CN109309554B

CN109309554B - Communication method and communication device

Info

Publication number: CN109309554B
Application number: CN201710624033.7A
Authority: CN
Inventors: 黎超; 冯淑兰; 张兴炜; 时洁
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-07-27
Filing date: 2017-07-27
Publication date: 2022-01-14
Anticipated expiration: 2037-07-27
Also published as: CN109309554A

Abstract

The present application provides communication methods and communication devices. A communication method includes: generating a demodulation reference signal according to first information and a cell identifier of a cell, where the first information indicates a time domain position of a synchronization signal in the cell; and sending the generated demodulation reference signal. Another communication method includes: receiving a demodulation reference signal; and determining first information according to a cell identifier of a cell and the demodulation reference signal, where the first information indicates a time domain position of a synchronization signal in the cell. The communication method and communication device of the embodiments of the present application help the receiving end device to accurately determine timing information.

Description

Communication method and communication device

Technical Field

The present application relates to the field of communications, and more particularly, to a communication method and a communication apparatus.

Background

In wireless communication systems, such as Long Term Evolution (LTE) systems and the fifth generation (the 5)^thgeneration, 5G) system, before a terminal accesses an access network, the terminal needs to synchronize with the access network.

In the process of synchronizing the terminal with the access network, it is generally required to detect a Synchronization Signal (SS) sent by the access network first to determine timing information according to the SS, so as to synchronize with the access network according to the timing information. The SS includes a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSs).

In a 5G system, a plurality of PSS and a plurality of SSS are included in one timing window, and a terminal cannot accurately determine timing information after detecting the PSS and the SSS.

Disclosure of Invention

The application provides a communication method and communication equipment, which are beneficial to a receiving end device to accurately determine timing information.

In a first aspect, the present application provides a method of communication. The communication method comprises the following steps: generating a demodulation reference signal (DMRS) according to first information and a cell identifier of a cell, the first information indicating a time domain position of a synchronization signal in the cell; and transmitting the generated demodulation reference signal.

In the communication method, the demodulation reference signal is generated according to the first information, so that the demodulation reference signal carries the first information, the receiving end can determine the first information according to the demodulation reference signal, the time domain position of the synchronization signal can be obtained according to the first information, and finally the timing information can be determined according to the time domain position of the synchronization signal.

In addition, the demodulation reference signal carrying the first information is generated according to the cell identifier of the cell, so that the receiving end can better associate the demodulation reference signal with the cell, and the efficiency of determining the timing information is improved.

In the first aspect, the cell identity may comprise a physical cell identity of the cell, a cell group identity of the cell, or an intra-cell group identity.

The cell group identifier may be a primary synchronization signal identifier of the cell, and the cell group identifier of the cell may be a secondary synchronization signal identifier of the cell.

In the first aspect, the demodulation reference signal may be a signal carried on a physical broadcast channel. Accordingly, transmitting the demodulation reference signal may include: the demodulation reference signal is transmitted on a physical broadcast channel.

In the first aspect, the transmission power of the subcarrier occupied by the demodulation reference signal is greater than the transmission power of the subcarrier occupied by the non-demodulation reference signal in the channel in which the demodulation reference signal is located by a predetermined value.

This may enable a signal to interference noise ratio of the DMRS of the current cell with respect to the data symbols of the neighboring cell to be improved when the symbols occupied by the DMRS of the current cell overlap with the symbols of the neighboring cell. Thereby, the detection probability of the first information can be improved.

In a first possible implementation manner, generating a demodulation reference signal according to the first information and a cell identifier of the cell may include: and generating sequence parameters of the reference signal sequence on the demodulation reference signal according to all information in the first information and the cell identification.

In a first possible implementation manner, the sequence parameter of the reference signal sequence on the demodulation reference signal may include one or more of the following: an initial value of a reference signal sequence, a cyclic shift value of the reference signal sequence, and a root sequence number of the reference signal sequence.

With reference to the first possible implementation manner, in a second possible implementation manner, the generating a demodulation reference signal according to the first information and the cell identifier of the cell may include: generating a first cyclic shift value according to the cell identifier of the cell; generating a second cyclic shift value according to the first information and the first cyclic shift value; and generating a reference signal sequence carried on the demodulation reference signal according to the first cyclic shift value and the second cyclic shift value.

The second cyclic shift value is the sequence parameter carrying the first information.

The first information may be all of the first information or may be a first part of the first information.

In a second possible implementation manner, optionally, generating a second cyclic shift value according to the first cyclic shift value and the first information may include: and generating a second cyclic shift value according to the first cyclic shift value, the first information and the time domain position of the time domain symbol carrying the demodulation reference signal.

With reference to the first possible implementation manner, in a third possible implementation manner, generating a demodulation reference signal according to the first information and a cell identifier of the cell includes: generating a first cyclic shift value according to the cell identifier of the cell; generating a second cyclic shift value according to the first information and the cell identifier of the cell; and generating a reference signal sequence carried on the demodulation reference signal according to the first cyclic shift value and the second cyclic shift value.

In a third possible implementation manner, optionally, generating a second cyclic shift value according to the first information and the cell identifier of the cell may include: and generating a second cyclic shift value according to the first information, the cell identification of the cell and the position of the time domain symbol carrying the demodulation reference signal.

In the second, third, or fourth possible implementation manner, the generating a first cyclic shift value according to the cell identifier of the cell may include: the cell identity of the cell is taken as the first cyclic shift value.

In the second or third possible implementation manner, optionally, the generating the first cyclic shift value according to the cell identifier of the cell may include: and generating a first cyclic shift value according to the cell identification of the cell and the time domain position of the time domain symbol carrying the demodulation reference signal.

With reference to the first possible implementation manner, in a fourth possible implementation manner, the generating a demodulation reference signal according to the first information and the cell identifier of the cell may include: generating a second cyclic shift value according to the cell identifier of the cell and the first information; generating a first cyclic shift value according to the cell identifier of the cell and the second cyclic shift value; generating the reference signal sequence according to the first cyclic shift value and the second cyclic shift value.

The first cyclic shift value and the second cyclic shift value are sequence parameters carrying the first information.

In a fourth possible implementation manner, generating the first cyclic shift value according to the cell identifier and the second cyclic shift value may include: and generating a first cyclic shift value according to the cell identifier, the second cyclic shift value and the position of the time domain symbol bearing the demodulation reference signal.

In the second, third, or fourth possible implementation manner, when the first information indicates adjacent time domain positions of the synchronization signal, the intervals of the second cyclic shift values may be equal and are integers greater than 1. Or, when the first information indicates different time domain positions of the synchronization signal, the intervals of the second cyclic shift values may be equal and are integers greater than 1. Further, the second cyclic shift value interval may be determined by the number of time domain positions of the synchronization signal and a length of a reference signal sequence carried on the demodulation reference signal.

And delta is larger than 1, so that the receiving end can quickly calculate the first information after detecting the second cyclic shift value, and the sequence fault-tolerant capability among different first information can be reduced.

With reference to the second, third, or fourth possible implementation manner, in a fifth possible implementation manner, the generating a reference signal sequence carried on a demodulation reference signal according to the first cyclic shift value and the second cyclic shift value may include:

generating a third sequence according to the first cyclic shift value, the second cyclic shift value, the first sequence and the second sequence;

taking the third sequence as a reference signal sequence carried on a demodulation reference signal; or

Intercepting a section of sequence in the third sequence as a reference signal sequence carried on the demodulation reference signal; or

Performing cyclic shift on the third sequence to obtain a reference signal sequence carried on the demodulation reference signal; or

And splicing the third sequence with another sequence to obtain a reference signal sequence carried on the demodulation reference signal.

The generating the third sequence according to the first cyclic shift value, the second cyclic shift value, the first sequence and the second sequence may specifically include: and shifting the first sequence by using the first cyclic shift value, shifting the second sequence by using the second cyclic shift value, and then generating a third sequence according to the two shifted sequences.

In general, if the length of the third sequence is greater than the length of the reference signal sequence that can be carried on the demodulation reference signal, after the third sequence is generated according to the first cyclic shift value, the second cyclic shift value, the first sequence and the second sequence, a sequence with the same length as the reference signal sequence that can be carried on the demodulation reference signal can be extracted from the third sequence as the reference signal sequence on the demodulation reference signal.

If the length of the third sequence is smaller than the length of the reference signal sequence which can be carried on the demodulation reference signal, the third sequence is generated according to the first cyclic shift value, the second cyclic shift value, the first sequence and the second sequence, and then the third sequence is shifted to obtain a sequence which is the same as the length of the reference signal sequence which is to be carried on the demodulation reference signal and is used as the reference signal sequence on the demodulation reference signal.

If the length of the third sequence is smaller than that of the reference signal sequence which can be borne on the demodulation reference signal, after the third sequence is generated according to the first cyclic shift value, the second cyclic shift value, the first sequence and the second sequence, other sequences are spliced on the third sequence, and the sequence which is obtained through splicing and has the same length as the reference signal sequence which can be borne on the demodulation reference signal is used as the reference signal sequence on the demodulation reference signal.

If the length of the third sequence is equal to the length of the reference signal sequence that can be carried on the demodulation reference signal, after the third sequence is generated according to the first cyclic shift value, the second cyclic shift value, the first sequence and the second sequence, the third sequence can be used as the reference signal sequence carried by the demodulation reference signal.

In a fifth possible implementation manner, the length of the first sequence, the length of the second sequence, and the length of the third sequence may be the same, and the initial values of the first sequence and the second sequence are non-all-zero integers.

In a fifth possible implementation manner, at least one of the first sequence and the second sequence may be obtained by any one of the following formulas:

x(i+6)＝(x(i+5)+x(i))mod2

x(i+6)＝(x(i+1)+x(i))mod2

x(i+6)＝(x(i+4)+x(i+3)+x(i+1)+x(i))mod2

x(i+6)＝(x(i+5)+x(i+2)+x(i+1)+x(i))mod2

x(i+6)＝(x(i+5)+x(i+3)+x(i+2)+x(i))mod2

x(i+6)＝(x(i+5)+x(i+4)+x(i+1)+x(i))mod2

in a fifth possible implementation manner, generating the third sequence according to the first cyclic shift value, the second cyclic shift value, the first sequence, and the second sequence may include:

generating a third sequence according to the following formula

d(n)＝[1-2x₀((n+m₀)modL)][1-2x₁((n+m₁)modL)]

Wherein x is₀Denotes a first sequence, x₁Denotes the second sequence, d denotes the third sequence, n is an integer from 0 to L-1, "mod" denotes modulo, L denotes the length of the third sequence, m denotes the length of the third sequence₁Denotes a second cyclic shift value, m₀Representing a first cyclic shift value.

With reference to the first possible implementation manner, in a sixth possible implementation manner, the generating a demodulation reference signal according to the first information and the cell identifier of the cell may include: generating an initial value of a fourth sequence by using the cell identifier; and according to the first information, intercepting a segment of sequence carrying the first information from the fourth sequence as a reference signal sequence carried on the demodulation reference signal.

This way, a fast detection of the first information by the receiving end is facilitated.

With reference to the first possible implementation manner, in a seventh possible implementation manner, generating a demodulation reference signal according to the first information and a cell identifier of the cell includes: generating an initial value of a fourth sequence according to the first information and the cell identifier; and intercepting a section of sequence from the fourth sequence to be used as a reference signal sequence carried on the demodulation reference signal.

In a sixth or seventh possible implementation manner, a position of the reference signal sequence on the demodulation reference signal in the fourth sequence indicates the first information.

With reference to the first possible implementation manner, in an eighth possible implementation manner, the generating a demodulation reference signal according to the first information and the cell identifier of the cell may include: determining a root sequence number according to the cell identifier; generating a third cyclic shift value according to the first information; generating a fifth sequence according to the root sequence number and the third cyclic shift value; and generating a reference signal sequence carried on the demodulation reference signal according to the fifth sequence.

With reference to the first aspect, in a ninth possible implementation manner, generating a demodulation reference signal according to the first information and a cell identifier of a cell includes: generating a reference signal sequence carried on a demodulation reference signal according to the cell identification of the cell; and generating modulation symbols carried on the reference signal sequence according to the first information.

When the modulation symbol of the reference signal sequence of the demodulation reference signal is used for carrying the first information, the sequence requirements under each cell can be reduced, the correlation performance between the sequences can be further improved, the inter-sequence interference under the multi-cell environment can be reduced, the detection rate can be improved, and the detection performance can be improved.

In a ninth possible implementation manner, the modulation symbols carried on the reference signal sequence of the demodulation reference signal include one or more of the following: 8PSK modulation symbols, QPSK modulation symbols, BPSK modulation symbols.

With reference to the first aspect, in a tenth possible implementation manner, generating a demodulation reference signal according to the first information and a cell identifier of a cell includes: generating a reference signal sequence carried on a demodulation reference signal according to the cell identification of the cell; and determining a resource mapping mode of the demodulation reference signal according to the first information.

When the first information is carried in the resource mapping mode of the demodulation reference signal, the sequence requirements under each cell can be reduced, the correlation performance between sequences can be further improved, the interference between sequences under a multi-cell environment can be reduced, the detection rate can be improved, and the detection performance can be improved.

In a tenth possible implementation manner, the resource mapping manner of the demodulation reference signal includes one or more of the following: the demodulation reference signal is mapped to the direction of the frequency domain subcarrier; the position of the frequency domain subcarrier to which the demodulation reference signal is mapped.

With reference to the first aspect, in an eleventh possible implementation manner, generating a demodulation reference signal according to the first information and a cell identifier of a cell includes: and generating a sequence parameter of a reference signal sequence carried on the demodulation reference signal according to the first part of information in the first information and the cell identification of the cell, and generating a modulation symbol carried on the reference signal sequence according to the second part of information in the first information, wherein the first part of information and the second part of information form the first information.

In an eleventh possible implementation manner, the modulation symbols carried on the reference signal sequence of the demodulation reference signal include one or more of the following: 8PSK modulation symbols, QPSK modulation symbols, BPSK modulation symbols.

In an eleventh possible implementation manner, reference may be made to the first possible implementation manner in an implementation manner in which the sequence parameter of the reference signal sequence carried on the demodulation reference signal is generated according to the first part of information in the first information and the cell identifier of the cell. Specifically, the first information in the first possible implementation manner may be replaced by the first part of the first information.

With reference to the first aspect, in a twelfth possible implementation manner, the generating a demodulation reference signal according to the first information and the cell identifier of the cell includes: and generating a sequence parameter of a reference signal sequence on the demodulation reference signal according to the first part of information in the first information, and determining a resource mapping mode of the demodulation reference signal according to the second part of information in the first information, wherein the first part of information and the second part form the information in the first information.

In a twelfth possible implementation manner, the resource mapping manner of the demodulation reference signal includes one or more of the following: the demodulation reference signal is mapped to the direction of the frequency domain subcarrier; the position of the frequency domain subcarrier to which the demodulation reference signal is mapped.

In a twelfth possible implementation manner, the implementation manner of generating the sequence parameter of the reference signal sequence carried on the demodulation reference signal according to the first part of information in the first information and the cell identifier of the cell may refer to the first possible implementation manner. Specifically, the first information in the first possible implementation manner may be replaced by the first part of the first information.

With reference to the first aspect, in a thirteenth possible implementation manner, the generating a demodulation reference signal according to the first information and a cell identifier of a cell includes: generating a reference signal sequence carried on a demodulation reference signal according to the cell identification of the cell; and generating a modulation symbol carried on the reference signal sequence according to the first part of information in the first information, and determining a resource mapping mode of the demodulation reference signal according to the second part of information in the first information, wherein the first part of information and the second part of information form the first information.

In a thirteenth possible implementation manner, the resource mapping manner of the demodulation reference signal includes one or more of the following: the demodulation reference signal is mapped to the direction of the frequency domain subcarrier; the position of the frequency domain subcarrier to which the demodulation reference signal is mapped.

In a thirteenth possible implementation manner, the modulation symbols carried on the reference signal sequence of the demodulation reference signal include one or more of the following: 8PSK modulation symbols, QPSK modulation symbols, BPSK modulation symbols.

With reference to the first aspect, in a fourteenth possible implementation manner, the generating a demodulation reference signal according to the first information and a cell identifier of a cell includes: generating a first demodulation reference signal according to the first part of information in the first information and the cell identifier; generating a second demodulation reference signal according to a second part of information in the first information and the cell identifier, wherein the first part of information and the second part of information form first information; transmitting a demodulation reference signal, comprising: and transmitting the first demodulation reference signal and the second demodulation reference signal.

Reference may be made to any one of the first to eleventh possible implementation manners in the first aspect to an implementation manner of generating the first demodulation reference signal according to the first part of the first information and the cell identifier. Specifically, the first information in any one of the first to eleventh possible implementation manners in the first aspect may be replaced by the first partial information in the first information.

Reference may be made to any one of the first to eleventh possible implementation manners in the first aspect to an implementation manner of generating a second demodulation reference signal according to the second part of information in the first information and the cell identifier. Specifically, the first information in any one of the first to eleventh possible implementation manners in the first aspect may be replaced by the second part of the first information.

The first demodulation reference signal and the second demodulation reference signal may occupy different time domain symbols.

In the first aspect or any one of the foregoing possible implementation manners, the reference signal sequence on the demodulation reference signal may be BPSK modulated.

In the first aspect or any one of the foregoing possible implementations, optionally, the reference signal sequence on the demodulation reference signal may be QPSK modulated, and the sequence generation parameter used for the real part of the reference signal sequence on the demodulation reference signal may be different from the sequence generation parameter used for the imaginary part of the reference signal sequence on the demodulation reference signal.

In a second aspect, the present application provides a method of communication. The communication method comprises the following steps: receiving a demodulation reference signal; determining first information according to a cell identifier of a cell and a demodulation reference signal, wherein the first information indicates a time domain position of a synchronization signal in the cell.

In a second aspect, the cell identifier of the cell includes a physical cell identifier of the cell, a master synchronization signal identifier of the cell, or a slave synchronization signal identifier of the cell.

In a second aspect, a demodulation reference signal is received, comprising: a demodulation reference signal on a physical broadcast channel is received.

In the second aspect, the transmission power of the subcarriers occupied by the demodulation reference signal may be greater than the transmission power of the subcarriers occupied by the non-demodulation reference signal in the channel in which the demodulation reference signal is located by a predetermined value.

With reference to the second aspect, in a first possible implementation manner, the determining first information according to a cell identifier of a cell and a demodulation reference signal includes: determining first information according to the cell identification and the sequence parameter of the reference signal sequence on the demodulation reference signal; or

Determining first information according to a cell identifier and a modulation symbol carried on a reference signal sequence on a demodulation reference signal; or

Determining first information according to a cell identifier and a resource mapping mode of a demodulation reference signal; or

Determining a reference signal sequence on a demodulation reference signal according to the cell identifier; determining a first part of information in the first information according to the sequence parameter of the reference signal sequence on the demodulation reference signal; determining second part information in the first information according to modulation symbols carried on the reference signal sequence, wherein the first part information and the second part information form the first information; or

Determining a reference signal sequence on a demodulation reference signal according to the cell identifier; determining first part information in the first information according to sequence parameters of a reference signal sequence on a demodulation reference signal, and determining second part information in the first information according to a resource mapping mode of the demodulation reference signal, wherein the first part information and the second part form all information in the first information;

determining a reference signal sequence on a demodulation reference signal according to the cell identifier; and determining first part information in the first information according to modulation symbols carried on a reference signal sequence on the demodulation reference signal, and determining second part information in the first information according to a resource mapping mode of the demodulation reference signal, wherein the first part information and the second part information form the first information.

With reference to the second aspect or the first possible implementation manner, in a second possible implementation manner, the sequence parameters of the reference signal sequence on the demodulation reference signal include one or more of the following: initial value of the sequence, cyclic shift value of the sequence, root sequence number of the reference signal sequence.

With reference to the second aspect or any one of the foregoing possible implementations, in a third possible implementation, the modulation symbols carried on the reference signal sequence of the demodulation reference signal include one or more of the following: 8PSK modulation symbols, QPSK modulation symbols, BPSK modulation symbols.

With reference to the second aspect or any one of the foregoing possible implementation manners, in a fourth possible implementation manner, the resource mapping manner of the demodulation reference signal includes one or more of the following: the demodulation reference signal is mapped to the direction of the frequency domain subcarrier; the position of the frequency domain subcarrier to which the demodulation reference signal is mapped.

With reference to the second aspect or any one of the foregoing possible implementation manners, in a fifth possible implementation manner, the determining the first information according to the cell identifier and the demodulation reference signal includes: determining a first cyclic shift value according to the cell identifier; determining a second cyclic shift value according to a reference signal sequence carried on the demodulation reference signal and the first cyclic shift value; determining the first information according to a first cyclic shift value and a second cyclic shift value.

With reference to the fifth possible implementation manner, in a sixth possible implementation manner, the determining the first information according to the first cyclic shift value and the second cyclic shift value includes: and determining the first information according to the first cyclic shift value, the second cyclic shift value and the position of the time domain symbol carrying the demodulation reference signal.

With reference to the first aspect or any one of the first to the fourth possible implementation manners, in a seventh possible implementation manner, the determining first information according to a cell identifier of a cell and a demodulation reference signal includes: determining a first cyclic shift value according to the cell identifier; determining a second cyclic shift value according to a reference signal sequence carried on the demodulation reference signal and the first cyclic shift value; and determining the first information according to the second cyclic shift value and the cell identifier.

With reference to the seventh possible implementation manner, in an eighth possible implementation manner, the determining the first information according to the second cyclic shift value and the cell identifier includes: and determining the first information according to the cell identification, the position of the time domain symbol of the demodulation reference signal and the second cyclic shift value.

With reference to any one of the fifth to eighth possible implementation manners, in a ninth possible implementation manner, the determining a first cyclic shift value according to a cell identifier includes: and determining a first cyclic shift value according to the cell identification and the position of the time domain symbol carrying the demodulation reference signal.

With reference to any one of the fifth to ninth possible implementation manners, in a tenth possible implementation manner, determining a second cyclic shift value according to a reference signal sequence carried on a demodulation reference signal and the first cyclic shift value includes: determining a third sequence according to a reference signal sequence carried on the demodulation reference signal; and determining a second cyclic shift value according to the third sequence, the first sequence, the second sequence and the first cyclic shift value.

Wherein the first cyclic shift value is a shift value for shifting the first sequence, and the second cyclic shift value is a shift value for shifting the second sequence.

With reference to the tenth possible implementation manner, in an eleventh possible implementation manner, when the first information indicates adjacent time domain positions of the synchronization signal, the second cyclic shift values are equally spaced and are integers greater than 1.

With reference to the tenth or eleventh possible implementation manner, in a twelfth possible implementation manner, the second cyclic shift value interval is determined by the number of time domain positions of the synchronization signal and the length of the reference signal sequence carried on the demodulation reference signal.

With reference to any one of the tenth to the twelfth possible implementation manners, in a thirteenth possible implementation manner, the length of the first sequence, the length of the second sequence, and the length of the third sequence are the same, and the initial values of the first sequence and the second sequence are non-all-zero integers.

With reference to any one of the tenth to the thirteenth possible implementation manners, in a fourteenth possible implementation manner, the determining a second cyclic shift value according to the third sequence, the first sequence, the second sequence, and the first cyclic shift value includes:

determining a second cyclic shift value according to the following equation:

d(n)＝[1-2x₀((n+m₀)modL)][1-2x₁((n+m₁)modL)]

With reference to any one of the tenth to the fourteenth possible implementation manners, in a fifteenth possible implementation manner, at least one of the first sequence and the second sequence is obtained by any one of the following formulas:

x(i+6)＝(x(i+5)+x(i))mod2

x(i+6)＝(x(i+1)+x(i))mod2

x(i+6)＝(x(i+4)+x(i+3)+x(i+1)+x(i))mod2

x(i+6)＝(x(i+5)+x(i+2)+x(i+1)+x(i))mod2

x(i+6)＝(x(i+5)+x(i+3)+x(i+2)+x(i))mod2

x(i+6)＝(x(i+5)+x(i+4)+x(i+1)+x(i))mod2

with reference to the second aspect or any one of the first to the fourth possible implementation manners, in a sixteenth possible implementation manner, the determining the first information according to the cell identifier and the demodulation reference signal includes: determining a first cyclic shift value and a second cyclic shift value according to a reference signal sequence carried on a demodulation reference signal; and determining the first information according to the cell identification and the first cyclic shift value.

With reference to the sixteenth possible implementation manner, in a seventeenth possible implementation manner, the determining the first information according to the cell identifier and the first cyclic shift value includes: and determining the first information according to the cell identification, the first cyclic shift value and the position of the time domain symbol carrying the demodulation reference signal.

With reference to the second aspect or any one of the first to the fourth possible implementation manners, in an eighteenth possible implementation manner, the determining the first information according to the cell identifier of the cell and the demodulation reference signal includes: generating an initial value of a fourth sequence according to the cell identifier of the cell; and determining the first information according to the reference signal sequence and the fourth sequence carried on the demodulation reference signal.

With reference to the eighteenth possible implementation manner, in a nineteenth possible implementation manner, the determining the first information according to the reference signal sequence and the fourth sequence carried on the demodulation reference signal includes: and determining the first information according to the position of the reference signal sequence carried on the demodulation reference signal in the fourth sequence.

With reference to the second aspect or any one of the first to the fourth possible implementation manners, in a twentieth possible implementation manner, the determining the first information according to the cell identifier of the cell and the demodulation reference signal includes: and determining the first information according to the reference signal sequence on the demodulation reference signal, the fourth sequence, the cell identifier and the initial value of the fourth sequence, wherein the reference signal sequence on the demodulation reference signal is a segment of sequence in the fourth sequence.

In particular, the first information may be determined according to the position of the reference signal sequence in the fourth sequence.

With reference to the second aspect or any one of the first to the fourth possible implementation manners, in a twenty-first possible implementation manner, the determining first information according to a cell identifier of a cell and a demodulation reference signal includes: determining a root sequence number of a fifth sequence according to the cell identifier; determining a third cyclic shift value according to the root sequence number of the fifth sequence and a reference signal sequence carried on the demodulation reference signal; the first information is determined according to the third cyclic shift value.

With reference to the second aspect, in a twenty-second possible implementation manner, receiving a demodulation reference signal includes: receiving a first demodulation reference signal and a second demodulation reference signal; the determining the first information according to the cell identifier of the cell and the demodulation reference signal includes: determining first part information in the first information according to the cell identification of the cell and the first demodulation reference signal; and determining second part information in the first information according to the cell identification of the cell and the second demodulation reference signal, wherein the first part information and the second part information form the first information.

In a twenty-second possible implementation manner, the first demodulation reference signal and the second demodulation reference signal may occupy different time domain symbols.

With reference to the twenty second possible implementation manner, in a twenty third possible implementation manner, the determining the first part of the first information according to the cell identifier of the cell and the first demodulation reference signal includes: determining first part information according to the cell identification and the sequence parameter of the reference signal sequence on the first demodulation reference signal; and/or

Determining a first demodulation reference signal according to the cell identifier; determining first part information according to modulation symbols carried on a reference signal sequence on a first demodulation reference signal; and/or

Determining a first demodulation reference signal according to the cell identifier; and determining the first part of information according to the cell identifier and the resource mapping mode of the first demodulation reference signal.

With reference to the twenty-second or twenty-third possible implementation manner, in a twenty-fourth possible implementation manner, the determining, according to the cell identifier of the cell and the second demodulation reference signal, the second part of information in the first information includes: determining second part information according to the cell identification and the sequence parameter of the reference signal sequence on the second demodulation reference signal; and/or

Determining second part information according to the cell identification and a modulation symbol carried on a reference signal sequence on a second demodulation reference signal; and/or

And determining the second part of information according to the cell identifier and the resource mapping mode of the second demodulation reference signal.

In the second aspect or any one of the foregoing possible implementations, the reference signal sequence on the demodulation reference signal may be BPSK modulated.

In the second aspect or any one of the above possible implementations, optionally, the reference signal sequence on the demodulation reference signal may be QPSK modulated, and the sequence generation parameter used for the real part of the reference signal sequence on the demodulation reference signal may be different from the sequence generation parameter used for the imaginary part of the reference signal sequence on the demodulation reference signal.

In a third aspect, the present application provides a communication device. The communication device comprises means for performing the first aspect or the communication method in any one of the possible implementations of the first aspect.

In a fourth aspect, the present application provides a communication device. The communication device comprises means for performing the second aspect or the communication method in any one of the possible implementations of the second aspect.

In a fifth aspect, the present application provides a communication device. The communication device includes a processor, a transmitter, and a receiver. The processor is used for executing the program. The processor, the transmitter and the receiver implement the communication method of the first aspect or any one of the possible implementations of the first aspect when the processor executes the code.

Optionally, the communication device may further comprise a memory for storing code for execution by the processor.

In a sixth aspect, the present application provides a communication device. The communication device includes a processor, a receiver, and a transmitter. The processor is used for executing the program. The processor, the receiver and the transmitter implement the communication method of the second aspect or any one of the possible implementations of the second aspect when the processor executes the code.

In a seventh aspect, the present application provides a computer-readable storage medium. The computer readable storage medium has stored therein program code for execution by the communication device. The program code comprises instructions for performing the communication method of the first aspect or any one of the possible implementations of the first aspect.

In an eighth aspect, the present application provides a computer-readable storage medium. The computer readable storage medium has stored therein program code for execution by the communication device. The program code comprises instructions for carrying out the second aspect or the communication method in any one of the possible implementations of the second aspect.

In a ninth aspect, the present application provides a computer program product comprising instructions. The computer program product, when run on a communication device, causes the communication device to perform the communication method of the first aspect or any one of the possible implementations of the first aspect.

In a tenth aspect, the present application provides a computer program product comprising instructions. The computer program product, when run on a communication device, causes the communication device to perform the communication method of the second aspect or any one of the possible implementations of the second aspect.

In an eleventh aspect, the present application provides a chip system, which includes a processor, and is configured to support a distributed unit, a centralized unit, and a communication device to implement the communication method in the first aspect or any one of the possible implementations of the first aspect, for example, to generate or process data and/or information involved in the method. In one possible design, the system-on-chip further includes a memory for storing program instructions and data necessary for the distributed unit, the centralized unit, and the terminal device. The chip system may be constituted by a chip, or may include a chip and other discrete devices.

In a twelfth aspect, the present application provides a chip system, which includes a processor, and is configured to support the distributed unit, the centralized unit, and the communication device to implement the communication method in the second aspect or any one of the possible implementations of the second aspect, for example, to generate or process data and/or information involved in the foregoing methods. In one possible design, the system-on-chip further includes a memory for storing program instructions and data necessary for the distributed unit, the centralized unit, and the terminal device. The chip system may be constituted by a chip, or may include a chip and other discrete devices.

Drawings

Fig. 1 is a system architecture diagram of an application scenario to which the communication method according to the embodiment of the present application may be applied;

FIG. 2 is a schematic flow chart diagram of a communication method of one embodiment of the present application;

FIG. 3 is a schematic flow chart diagram of a communication method of another embodiment of the present application;

FIG. 4 is a schematic flow chart diagram of a communication method of another embodiment of the present application;

FIG. 5 is a schematic flow chart diagram of a communication method of another embodiment of the present application;

FIG. 6 is a schematic flow chart diagram of a communication method of another embodiment of the present application;

FIG. 7 is a schematic flow chart diagram of a communication method of another embodiment of the present application;

FIG. 8 is a schematic flow chart diagram of a communication method of another embodiment of the present application;

FIG. 9 is a schematic block diagram of a communication device of one embodiment of the present application;

fig. 10 is a schematic structural diagram of a communication apparatus of another embodiment of the present application;

fig. 11 is a schematic structural diagram of a communication apparatus of another embodiment of the present application;

fig. 12 is a schematic configuration diagram of a communication apparatus according to another embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings. It should be understood that, in the technical solutions of the present application, the same letter designations denote the same meanings unless otherwise specified.

As shown in fig. 1, a communication system to which the communication method of the embodiment of the present application can be applied may include a communication device 110 and a communication device 120.

Any one of the communication device and the communication device may be a terminal or a network side device. For example, when the communication device 110 is a terminal, the communication device 120 may be a terminal or a network side device; for another example, when the communication device 110 is a network-side device, the communication device may be a terminal, or may be a network-side device.

The terminal may be a User Equipment (UE). The UE may communicate with one or more Core Networks (CNs) via AN 120. A UE may be referred to as an access terminal, terminal device, subscriber unit, subscriber station, mobile, remote station, remote terminal, mobile device, user terminal, wireless network device, user agent, or user equipment. The UE may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capability, a computing device or other device connected to a wireless modem, a vehicle-mounted device, a wearable device or internet of things, a terminal device in a vehicle network, a terminal device in a future network in any form, and so on.

The network device may specifically be a Radio Access Network (RAN) device.

One example of a network device is a base station. It should be understood that the embodiment of the present application does not limit the specific type of the base station. In systems using different radio access technologies, the names of devices with base station functionality may vary. For convenience of description, in all embodiments of the present application, the above-mentioned apparatuses for providing a terminal with a wireless communication function are collectively referred to as a base station,

a Base Station (BS), also referred to as a base station device, is a device for accessing a terminal to a wireless network, including but not limited to: a Transmission Reception Point (TRP), a 5G Node B (gnb), an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base Station (e.g., home evolved Node B, or home Node B), an HNB base unit (BBU), or a Wifi Access Point (AP), or a small cell base equipment (pico), etc.

It should be understood that the embodiments of the present application are not limited to the system architecture shown in fig. 1, and moreover, the apparatus in fig. 1 may be hardware, or may be functionally divided software, or a combination of the two.

Fig. 2 is a schematic flow chart of a communication method according to an embodiment of the present application. It should be understood that fig. 2 shows steps or operations of the communication method, but the steps or operations are only examples, and other operations or variations of the operations in fig. 2 may be performed by the embodiments of the present application. Moreover, the various steps in FIG. 2 may be performed in a different order presented in FIG. 2, and it is possible that not all of the operations in FIG. 2 may be performed.

S210, the communication device 110 generates a demodulation reference signal according to the first information and the cell identifier, where the first information indicates a time domain position of the synchronization signal.

Or, it can be said that the demodulation reference signal carries the first information.

The time domain position of the synchronization signal in the present invention refers to: which time domain position of all candidate synchronization signals the currently transmitted synchronization signal is at.

For example, there are 8 time domain positions of the candidate synchronization signal that the base station can transmit at maximum, and the time domain position of the currently transmitted synchronization signal may be any one of the 8, for example, the 3 rd.

For another example, there are 4 time domain positions of the candidate synchronization signal that can be transmitted by the base station at maximum, and the time domain position of the currently transmitted synchronization signal may be any one of the 4 time domain positions, for example, the 2 nd position.

The demodulation reference signal may be located in the same synchronization block as the synchronization signal, and therefore, the first information may also indicate a time domain position of the demodulation reference signal or indicate a time domain position of the synchronization block.

When the symbols occupied by the demodulation reference signal and the synchronization signal in the time domain have a relatively fixed relationship, the demodulation reference signal and the synchronization signal can be said to be located in the same synchronization block.

For example, one synchronization block may consist of 4 adjacent time domain symbols. Specifically, one synchronization block may sequentially include one PSS, one Physical Broadcast Channel (PBCH), one SSS, and one PBCH.

S220, the communication device 110 transmits a demodulation reference signal. Accordingly, the communication device 120 receives the demodulation reference signal.

The demodulation reference signal may be a signal carried on the PBCH or a reference signal used for PBCH demodulation. Correspondingly, the communication device 110 transmits the demodulation reference signal, which may include: the communication device 110 transmits a demodulation reference signal on the PBCH. Correspondingly, the communication device 120 receiving the demodulation reference signal includes: the communication device 120 receives the demodulation reference signal on the PBCH.

As shown in fig. 3, there may be 24 Physical Resource Blocks (PRBs) on the PBCH, and there may be 12 Resource Elements (REs) in each PRB. There may be 3 REs equally spaced on each PRB to carry the demodulation reference signal, and the rest of the REs may be used to carry data. The RE carrying the demodulation reference signal is denoted by the letter "a" in fig. 3.

S230, the communication device 120 determines the first information according to the cell identifier of the cell and the received demodulation reference signal.

In the communication method according to the embodiment of the present application, the communication device 110 serving as the sending end carries the first information indicating the position information of the synchronization signal by the demodulation reference signal, so that the communication device 120 serving as the receiving end can determine the position information of the synchronization signal according to the first information, thereby being beneficial to the terminal to determine the timing information.

In addition, the communication device 110 generates the demodulation reference signal carrying the first information according to the cell identifier, which helps the communication device 120 to quickly determine the candidate demodulation reference signal for detecting the first information under the corresponding cell identifier.

In this embodiment, the cell identifier may include a physical cell identifier, a cell group identifier, or an intra-cell group identifier.

Alternatively, the cell group identity may be an identity of a slave synchronization sequence, and the intra-cell group identity may be an identity of a master synchronization sequence.

In this embodiment of the present application, the transmission power of the subcarrier occupied by the demodulation reference signal may be greater than the transmission power of the subcarrier occupied by the non-demodulation reference signal in the channel in which the demodulation reference signal is located by a predefined value. The method has the effect that when the DMRS of the cell is overlapped with the data symbols of the adjacent cell, the signal interference noise ratio of the DMRS relative to the data symbols of the adjacent cell can be improved. Thereby improving the detection probability of the first information.

In this embodiment, the reference signal sequence on the demodulation reference signal may be BPSK modulation. The modulation mode can reduce the complexity of generating the reference signal sequence, and the detection of the receiving end is simpler.

An example of BPSK modulation is as follows:

r_x(n)＝1-2r(n)

wherein r is_xTo demodulate a reference signal sequence on a reference signal, r (n) is a sequence that generates the reference signal sequence.

Alternatively, the reference signal sequence on the demodulation reference signal may be QPSK modulation, and the sequence generation parameter used for the real part of the reference signal sequence on the demodulation reference signal and the sequence generation parameter used for the imaginary part of the reference signal sequence on the demodulation reference signal may be different. The modulation mode simultaneously utilizes the real part and the imaginary part, which is beneficial to improving the transmission efficiency of the demodulation reference signal and can provide more detectable information.

An example of QPSK modulation is as follows:

wherein r is_xFor demodulating a reference signal sequence on a reference signal, r₁(n) and r₂And (n) is a sequence generated according to different sequence parameters. For example, generate r₁(n) and r₂(n) differ in cyclic shift value of the sequence, and/or r is generated₁(n) and r₂The sequence of (n) has different initial values. Optionally, r can also be₁(n) and r₂The sequences of (n) are different.

In S210, the communication device 110 may generate a demodulation reference signal on a time domain symbol according to the cell identifier of the cell and the first information. Or, the demodulating reference signal carrying the first information may include: the demodulation reference signal on one time domain symbol carries all the information of the first information. Accordingly, the communication device 120 may determine all information of the first information according to the cell identification of the cell and the demodulation reference signal S230.

For example, the first information is 3 bits of information, and the demodulation reference signal on one time domain symbol can carry the 3 bits of information.

When the demodulation reference signal on one time domain symbol carries the first information, one possible implementation manner is: the sequence parameter of the reference signal sequence on the demodulation reference signal carries all information in the first information. Accordingly, the communication device 120 determines all information in the first information according to the cell identifier of the cell and the sequence parameter of the reference signal sequence carried on the demodulation reference signal.

The sequence used to generate the demodulation reference signal is referred to as a reference signal sequence.

The sequence parameter of the reference signal sequence on the demodulation reference signal refers to a parameter used for generating the reference signal sequence carried on the demodulation reference signal.

The sequence parameters of the reference signal sequence on the demodulation reference signal may include one or more of: initial value of the sequence, cyclic shift value of the sequence, root sequence number of the reference signal sequence.

The sequence initial values refer to: to generate a value for an initial state of the reference signal. In particular, for sequences generated with a shift register of finite length, the shift register needs to be initialized so that valid values can be obtained when the sequence is calculated with a generator polynomial.

Cyclic shift value of sequence: is the shift value according to which a sequence is cyclically shifted to obtain a new sequence.

Root sequence number of reference signal sequence: refers to a value of a root sequence number of a ZC (Zadoff-Chu) sequence.

When all information in the first information is carried by the cyclic shift value of the reference signal sequence, one possible implementation manner of the communication device 110 generating the demodulation reference signal according to the first information and the cell identifier of the cell may include: the communication device 110 generates a first cyclic shift value according to the cell identifier; generating a second cyclic shift value according to all the information in the first information and the first cyclic shift value; and generating a reference signal sequence according to the first cyclic shift value and the second cyclic shift value.

Accordingly, in S230, the communication device 120 may determine a first cyclic shift value according to the cell identity; determining a second cyclic shift value according to a reference signal sequence carried on the demodulation reference signal and the first cyclic shift value; determining the first information according to a first cyclic shift value and a second cyclic shift value.

When the communication device 110 generates the second cyclic shift value according to all the information in the first information and the first cyclic shift value, one implementation manner is as follows: according to the formula

A second cyclic shift value is generated.

Accordingly, the communication device may be based on the first cyclic shift value, the second cyclic shift value, and the formula

All of the first information is determined.

Where k denotes all information in the first information, and m₁Denotes a second cyclic shift value, L denotes a length of a sequence corresponding to the second cyclic shift value, M denotes a number of time domain positions of the synchronization signal, Δ denotes an interval of the second cyclic shift value,

indicating a rounding down.

Δ may be a configured or predefined integer, e.g., Δ may be predefined as 1, 2, 3, etc. Or Δ may be derived from L and M. For example, it can be based on a formula

A is obtained.

Δ is greater than 1, which enables the communication device 120 to calculate the first information quickly after detecting the second cyclic shift value, and also reduces the sequence tolerance between different first information.

When the communication device 110 generates the second cyclic shift value, in addition to generating the second cyclic shift value according to all the information in the first information and the first cyclic shift value, the second cyclic shift value may also be generated according to the position of the time domain symbol where the demodulation reference signal is located.

Accordingly, when the communication device 120 determines all information in the first information according to the first cyclic shift value and the second cyclic shift value, the second cyclic shift value may also be generated according to the position of the time domain symbol where the demodulation reference signal is located.

Another possible implementation manner of the communication device 110 generating the demodulation reference signal according to the first information and the cell identifier of the cell when all information in the first information is carried by the cyclic shift value of the reference signal sequence may include: the communication device 110 generates a first cyclic shift value according to the cell identifier; generating a second cyclic shift value according to all information in the first information and the cell identification; and generating a reference signal sequence according to the first cyclic shift value and the second cyclic shift value.

The communication device 110 may generate the second cyclic shift value according to all information in the first information and the cell, and may also generate the second cyclic shift value according to a position of a time domain symbol where the demodulation reference signal is located.

For example, the communication device 110 may determine the cell identifier n according to all information k in the first information_IDThe position n of the time domain symbol where the demodulation reference signal is located_xAnd formula

Generating a second cyclic shift value m₁。

Accordingly, when the communication device 120 determines all the information in the first information according to the cell identifier and the second cyclic shift value, the second cyclic shift value may also be generated according to the position of the time domain symbol where the demodulation reference signal is located.

For example, the communication device 120 may determine the cell identifier, the second cyclic shift value, and the position n of the time domain symbol where the demodulation reference signal is located_xAnd formula

All of the first information is determined.

In the foregoing various manners, when the communication device 110 or the communication device 120 generates the first cyclic shift value according to the cell identifier, one possible implementation manner is: the communication device 110 or the communication device 120 takes the cell identity as the first cyclic shift value, i.e. m₀＝n_ID，n_IDDenotes cell identity, m₀Representing a first cyclic shift value.

When the communication device 110 or the communication device 120 generates the first cyclic shift value, the first cyclic shift value may be generated according to a position of a time domain symbol where the demodulation reference signal is located, in addition to the cell identifier. E.g. m₀＝n_ID+n_x，n_xIndicating the position of the time domain symbol where the demodulation reference signal is located. m is₀＝n_ID+n_xDenotes the use of n_xAnd n_IDAdd to obtain m₀Of course, other methods may be used.

Another possible implementation manner of the communication device 110 generating the demodulation reference signal according to the first information and the cell identifier of the cell when all information in the first information is carried by the cyclic shift value of the reference signal sequence may include: the communication device 110 generates a second cyclic shift value according to the cell identifier and the first information; generating a first cyclic shift value according to all information in the first information and the second cyclic shift value; and generating a reference signal sequence according to the first cyclic shift value and the second cyclic shift value.

Accordingly, the communication device 120 determines all information in the first information according to the reference signal sequence on the demodulation reference signal, the first cyclic shift value, the second cyclic shift value, and the cell identity.

In various manners described above, the generating, by the communication device 110, the reference signal sequence according to the first cyclic shift value and the second cyclic shift value may include: the communication device 110 generates a third sequence according to the first cyclic shift value, the second cyclic shift value, the first sequence and the second sequence, and then generates a reference signal sequence according to the third sequence.

Accordingly, the communication device 120 determines a third sequence from the reference signal sequence on the demodulation reference signal, and determines a second cyclic shift value from the third sequence, the first sequence, and the second sequence.

The generating, by the communication device 110, a third sequence according to the first cyclic shift value, the second cyclic shift value, the first sequence, and the second sequence may specifically include: the communication device 110 shifts the first sequence using the first cyclic shift value, shifts the second sequence using the second cyclic shift value, and then generates a third sequence from the shifted two sequences.

The communication device 110 shifts the value m according to the first cycle₀The second cyclic shift value m₁A first sequence x₀And a second sequence x₁When generating the third sequence d, the following formula can be used to implement:

d(n)＝[1-2x₀((n+m₀)modL)][1-2x₁((n+m₁)modL)]

n is an integer less than the length of the third sequence and "mod" denotes modulo. Wherein, the lengths of the first sequence, the second sequence and the third sequence can be the same and are all L. For example, L may be 63.

Accordingly, when the communication device 120 determines the second cyclic shift value according to the third sequence, the first sequence, and the second sequence, it may also determine the second cyclic shift value according to the formula d (n) ([ 1-2x ])₀((n+m₀)modL)][1-2x₁((n+m₁)modL)]And (5) realizing.

x₀And x₁May be the same or different. x is the number of₀And x₁May be 63, x, respectively₀And x₁Each can be generated by any one of the following polynomials. Wherein x is₀And x₁May be 6 numbers other than all 0's.

x(i+6)＝(x(i+5)+x(i))mod2

x(i+6)＝(x(i+1)+x(i))mod2

x(i+6)＝(x(i+4)+x(i+3)+x(i+1)+x(i))mod2

x(i+6)＝(x(i+5)+x(i+2)+x(i+1)+x(i))mod2

x(i+6)＝(x(i+5)+x(i+3)+x(i+2)+x(i))mod2

x(i+6)＝(x(i+5)+x(i+4)+x(i+1)+x(i))mod2

When the length of the third sequence obtained by the communication device 110 is smaller than the length of the reference signal sequence, the communication device 110 may generate the reference signal sequence from the third sequence by using a cyclic shift method. For example, the length of the third sequence is 63, and the length of the reference signal sequence should be 72.

When the length of the third sequence obtained by the communication device 110 is smaller than the length of the reference signal sequence, the communication device 110 may also use serial concatenation of the third sequence and another sequence to obtain the reference signal sequence. For example, a part or all of the other sequence is taken to be spliced with the whole third sequence to obtain the reference signal sequence. The generation of the further sequence may refer to the generation of the third sequence.

For example, when the length of the third sequence is L and the length of the reference signal sequence on the demodulation reference signal is N, r (0: L-1) ═ d₁(0:L-1)，r(L:N-1)＝d₂(0: N-L-1). Where r denotes a reference signal sequence on the demodulation reference signal, d₁Denotes a third sequence, d₂Representing another sequence.

When the length of the third sequence obtained by the communication device 110 is greater than the length of the reference signal sequence, the communication device 110 may intercept a sequence from the third sequence as the reference signal sequence. For example, the third sequence has a length of 127, and the reference signal sequence has a length of only 72. The equation can be expressed as r (N) ═ d (N + a),0 ≦ N < N, N is the length of the reference signal sequence r on the demodulation reference signal, and a is a constant.

It is to be understood that when the length of the third sequence obtained by the communication device 110 is equal to the length of the reference signal sequence, the communication device 110 may directly use the third sequence as the reference signal sequence. For example, the third sequence has a length of 72, and the reference signal sequence also has a length of 72.

The following is an example in which the communication device 110 generates a reference signal sequence on the demodulation reference signal from the cell identity and the first information. Namely, a third sequence d is obtained according to the following formula, and then a reference signal sequence on the demodulation reference signal is obtained according to the third sequence:

d(n)＝[1-2x₀((n+m₀)modL)][1-2x₁((n+m₁)modL)]

0≤m₀<N_PCID-1

0≤k<M

0≤n<L

wherein d is a third sequence; x is the number of₀Is a first sequence; x is the number of₁Is a second sequence; m is₀For the first cyclic shift value for shifting the first sequence, the cell identifier of the current cell in all cells may be taken; m is₁A second cyclic shift value that shifts the second sequence; l is the length of the third sequence; n is a radical of_PCIDIs the total number of cells; k represents the value of the first information, and the position of the current synchronization signal can be taken; m represents the total state number of the first information to be transmitted, if the first information to be transmitted is 3 bits, the value of M is 8, and if the information to be transmitted is 2 bits, the value of M is 4; Δ is a predefined or preconfigured constant, e.g. a value of 1; as another example, Δ may be the second cyclic shift value interval in the embodiments of the present application, and its value may be

Indicating a rounding down. n is an integer and represents each symbol on sequence d. For the value of the parameter k, a decimal value corresponding to the first information bit to be transmitted may be used, and if the bit corresponding to the first information is 111, the value of k may be 7. If the bit corresponding to the first information is 10, the value of k may beAnd is 2. The value of k may also be an index value of the first information. This is not to be taken as an example.

Here, after the communication device 110 obtains the third sequence d, d may be directly used as the reference signal sequence on the demodulation reference signal, and of course, other methods may be used to obtain the reference signal sequence on the demodulation reference signal according to d.

The following is another example of the communication device 110 generating a reference signal sequence on a demodulation reference signal from the cell identity and the first information. Namely, a third sequence d is obtained according to the following formula, and then a reference signal sequence on the demodulation reference signal is obtained according to the third sequence:

d(n)＝[1-2x₀((n+m₀)modL)][1-2x₁((n+m₁)modL)]

m₀＝n_ID+n_x

0≤m₀<N_PCID-1

0≤k<M

0≤n<L

wherein n is_xA time domain resource identifier representing a demodulation reference signal; n is_IDIndicating the cell identity of the current cell.

d(n)＝[1-2x₀((n+m₀)modL)][1-2x₁((n+m₁)modL)]

m₁＝(k+n_ID·M)·Δ

0≤n_ID<N_PCID

0≤k<M

0≤n<L

wherein the communication device 110 determines the cyclic shift value m0 of the first sequence from the cyclic shift value m1 of the second sequence. The uniform distribution of the values of all candidate first information on each cyclic shift value can be realized, so that the detection fault-tolerant capability of the first information is improved.

When all information in the first information is carried by the cyclic shift value of the reference signal sequence, the communication device 110 generates the demodulation reference signal according to the first information and the cell identifier, which may include: the communication device 110 first generates a longer sequence according to the cell identifier, for example, using the cell identifier as an initial value of the longer sequence and generating the longer sequence; then, a sequence corresponding to the first information is extracted from the longer sequence based on the first information as a reference signal sequence. This longer sequence may be referred to as the fourth sequence. For example, the fourth sequence may be 2 in length³¹-1. Thus, the rapid detection of the first information at the receiving end is facilitated.

Accordingly, the communication device 120 generates an initial value of the fourth sequence and the fourth sequence according to the cell identifier of the cell; and determining the first information according to the reference signal sequence and the fourth sequence carried on the demodulation reference signal.

The communication device 110 or the communication device 120 generates the fourth sequence according to the cell identifier of the cell, which may include:

C_init＝n_ID

c(n)＝(x₁(n+N_C)+x₂(n+N_C))mod2

c represents a fourth sequence, C_initDenotes the initial value of c, N_CIs a constant, configured or predefined, and n is an integer of length less than c.

The communication device 110 may extract, as the reference signal sequence, a sequence corresponding to the first information from the fourth sequence according to the first information, and may include:

r(n)＝[1-2c(n+k·T)]

r denotes a reference signal sequence, k denotes first information, T is a constant, and may be configured or predefined, for example, 1, 1600, 3200, 6400, etc., which is not limited in this application.

For example, when the first information is 3 bits, M may be equal to 8; when the first information is 2 bits, M may be equal to 4 and T may be equal to 1. As another example, when M equals 8 and T equals 1600, the fourth sequence length 72+ M × T equals 12872.

Fig. 4 is a schematic diagram of the communication device 110 intercepting the reference signal sequence carrying the first information of "000" to "111" of 3 bits from the fourth sequence with the length of 72+ M × T.

When all the information in the first information is carried by the initial value of the sequence, one possible implementation manner for the communication device 110 to generate the demodulation reference signal according to the first information and the cell identifier includes: the communication device 110 generates an initial value of the fourth sequence from all information in the first information and the cell identification of the cell.

Accordingly, the communication device 120 determines the first information according to the reference signal sequence on the demodulation reference signal, which is a segment of the fourth sequence, the identity of the cell, and an initial value of the fourth sequence.

The initial value for generating the fourth sequence according to the first information and the cell identifier may be expressed in the form of a formula: c. C_init＝f(n_IDK), where k represents all information of the first information, n_IDDenotes cell identity, c_initDenotes the initial value of the fourth sequence and f (x, y) denotes a function of the input parameters x and y.

The initial value for generating the fourth sequence from the first information and the cell identity may be expressed as: c. C_init＝n_ID+ k + D or c_init＝(n_ID+ k) D, D is a predefined constant.

When all information in the first information is carried by the root sequence number of the reference signal sequence, the communication device 110 generates the demodulation reference signal according to the first information and the cell identifier, which may include: the communication device 110 generates a root sequence number from the cell identity; generating a third cyclic shift value according to the first information; generating a fifth sequence according to the root sequence number and the third cyclic shift value, or generating the fifth sequence according to the cell identifier and the third cyclic shift value; and generating a reference signal sequence according to the fifth sequence.

Accordingly, the communication device 120 determines the root sequence number of the fifth sequence according to the cell identifier; determining a third cyclic shift value according to the root sequence number of the fifth sequence and a reference signal sequence carried on the demodulation reference signal; the first information is determined according to the third cyclic shift value.

The communication device 110 or the communication device 120 generates a root sequence number according to the cell identifier, which may include: the communication device 110 or the communication device 120 has the cell identity as the root sequence number. Optionally, the generating, by the communication device 110 or the communication device 120, the root sequence number according to the cell identifier may include: the communication device 110 or the communication device 120 generates a root sequence number according to the cell identifier and the position of the time domain symbol where the demodulation reference signal is located and the cell identifier.

The communication device 110 generates a third cyclic shift value according to the first information, which may include: the communication device 110 generates a third cyclic shift value from the root sequence number and the first information. The communication device 110 may refer to an implementation manner in which the communication device generates the second cyclic shift value according to the first cyclic shift value and the first information.

Optionally, the generating, by the communication device 110, a third cyclic shift value according to the first information may include: the communication device 110 generates a third cyclic shift value according to the position of the time domain symbol where the demodulation reference signal is located and the first information. The communication device 110 may refer to an implementation manner in which the communication device 110 generates the third cyclic shift value according to the position of the time domain symbol in which the demodulation reference signal is located and the first information.

One implementation of the communication device 110 generating the root sequence number according to the cell identifier, generating the third cyclic shift value according to the first information, generating the fifth sequence according to the root sequence number and the third cyclic shift value, and generating the reference signal sequence according to the fifth sequence is as follows:

d(m₂,m₃)＝r(m₂modL,n+m₃)

r(u,n)＝x_u(nmodL)

0≤n<L

wherein d represents a reference signal sequence; m is₂Indicating a tracking sequence number, which can be obtained by a cell identifier; m is₃Represents a third cyclic shift value, x represents a fifth sequence, and L is equal to the length of the fifth sequence; Δ represents a predefined constant; k represents the first information and k represents the second information,

indicating a rounding down. Wherein L can be 71. M represents the maximum state or numerical value corresponding to the first information to be transmitted. If the information to be transmitted is 3 bits, M is 8; if the information to be transmitted is 2 bits, M is 4.

When the demodulation reference signal is generated by using the method, for the first information in one cell, after the communication device 120 determines the second sequence, the first information may be obtained by blind-checking M third sequences.

Another implementation manner of the communication device 110 generating the root sequence number according to the cell identifier, generating the third cyclic shift value according to the first information, generating the fifth sequence according to the root sequence number and the third cyclic shift value, and generating the reference signal sequence according to the fifth sequence is as follows:

d(m₂,m₃)＝r(m₂modL,n+m₃)

r(u,n)＝x_u(nmodL)

0≤n<L

wherein d represents a reference signal sequence; l equals the length of the fifth sequence minus 1; m is₂Indicating a tracking sequence number, which can be obtained by a cell identifier; m is₃Represents a third cyclic shift value, x represents a fifth sequence, Δ represents a predefined constant; k denotes first information, n_xIndicating the identity of the time domain resource in which the demodulation reference signal is located,

indicating a rounding down. Wherein L can be 71.

Compared with the previous method, the method can enable the demodulation reference signal to have different sequence parameters at different time, thereby randomizing the interference.

When the demodulation reference signal on one time domain symbol carries the first information, one possible implementation manner is: the modulation symbols of the reference signal sequence on the demodulation reference signal carry all of the first information.

The modulation symbols on the reference signal sequence include any one of: eight Phase Shift Keying (8 PSK) modulation symbols, Quadrature Phase Shift Keying (QPSK) modulation symbols, Binary Phase Shift Keying (BPSK) modulation symbols.

Here, the modulation symbol refers to mapping the first information into a corresponding modulation symbol, and then multiplying the corresponding symbol by all or part of symbols in a reference signal sequence of the demodulation reference signal to carry the modulation symbol in a spread spectrum manner. For example, if the first information is 3 bits, modulation symbols x and y may be generated, where x and y may both be 8PSK symbols to which the 3 bits are mapped, where x and y may be the same or different. As another example, if the first information is 2 bits, modulation symbols x and y may be generated, and x and y may both be QPSK symbols to which the 2 bits are mapped, where x and y may be the same or different. For example, in fig. 6, on the symbol where the PBCH is located, the length of the generated demodulation reference signal sequences r1(n) and r2(n) is 72, and the modulation symbols are x and y. Multiplying x by the symbol corresponding to r1(n) and y by the symbol corresponding to r2(n) is the way the modulation symbols are carried to the reference signal sequence.

For example, when the first information has three bits in total, the communication device 110 may generate a modulation symbol of 8PSK, and multiply the modulation symbol with each symbol of the reference signal sequence, thereby generating a demodulation reference signal carrying all the information in the first information.

When the demodulation reference signal on one time domain symbol carries the first information, one possible implementation manner is: the resource mapping mode of the demodulation reference signal carries all information in the first information.

The resource mapping mode of the demodulation reference signal comprises any one of the following modes: the demodulation reference signal is mapped to the direction of the frequency domain subcarrier; and demodulating the frequency domain subcarrier position to which the reference signal is mapped.

For example, the resource mapping direction of the demodulation reference signal may include two directions: mapping from high frequency resource blocks to low frequency resource blocks and mapping from low frequency resource blocks to high frequency resource blocks. The resource mapping manner of the demodulation reference signal may carry 1 bit of first information.

For example, for indicating 2-bit information, the position of the (0,0) corresponding DMRS in the PRB occupying 12 REs is {0, 4, 8 }; (0,1) corresponds to a position of the DMRS in the PRB occupying 12 REs being {1, 5, 9}, (1,0) corresponds to a position of the DMRS in the PRB occupying 12 REs being {2, 6, 10}, and (1,1) corresponds to a position of the DMRS in the PRB occupying 12 REs being {3, 7, 11 }.

When the resource mapping manner of the demodulation reference signal or the modulation symbol of the reference signal sequence carried on the demodulation reference signal carries all the information of the first information, one possible generation manner of the reference signal sequence carried by the demodulation reference signal is as follows: the communication device 110 generates a third sequence according to the following formula, and then generates a reference signal sequence carried on the demodulation reference signal according to the third sequence.

d(n)＝[1-2x₀((n+m₀)modL)][1-2x₁((n+m₁)modL)]

0≤m₀<N_PCID-1

0≤n<L

Wherein d is a third sequence; n is a radical of_PCIDIs the total number of cells; m is₀Taking the cell identification of the current cell for the first cyclic shift value; x is the number of₀Is a first sequence, x₁Is a second sequence; l is the length of the third sequence minus 1; mod represents the modulus; a is a pre-defined constant value that is,

indicating a rounding down.

When the resource mapping mode of the demodulation reference signal or the modulation symbol of the reference signal sequence carried on the demodulation reference signal carries all the information of the first information, another possible generation mode of the reference signal sequence carried by the demodulation reference signal is as follows: the communication device 110 generates a third sequence according to the following formula, and then generates a reference signal sequence carried on the demodulation reference signal according to the third sequence.

d(m₂,m₃)＝r(m₂modL,n+m₃)

r(u,n)＝x_u(nmodL)

0≤n<L

Wherein d represents a reference signal sequence; l is equal to the length of the third sequence minus 1; m is₂Indicating a tracking sequence number, which can be obtained by a cell identifier; m is₃Represents a third cyclic shift value, x represents a third sequence, Δ represents a predefined constant; k denotes first information, n_xIndicating the time domain symbol identity where the demodulation reference signal is located,

indicating a rounding down. Wherein L can be 71.

When the first information is carried by using the modulation symbol of the reference signal sequence of the demodulation reference signal or the resource mapping mode of the demodulation reference signal, the sequence requirements under each cell can be reduced, so that the correlation performance between sequences can be improved, the interference between sequences under a multi-cell environment can be reduced, the detection rate can be improved, and the detection performance can be improved.

An example of using the frequency domain subcarrier locations of the demodulation reference signals to carry the first information is shown in fig. 5. Where the lattice with the letter "a" represents the RE carrying the demodulation reference signal. Fig. 5 shows examples of the positions of the frequency domain subcarriers when the first information is 2-bit information and the first information is "00", "01", "10", and "11", respectively.

When the demodulation reference signal on one time domain symbol carries all information in the first information, the first information can be divided into two parts, one part is called first part information, and the other part is called second part information.

For example, the first information is 3 bits of information, and the 3 bits of information may be divided into 1 bit of information and two bits of information. The 1-bit information may be used as the first part information, and the 2-bit information may be used as the second part information.

For another example, the first information is 3 bits of information, and the 3 bits of information may be divided into two bits of information and two bits of information. The 2 bits of information may be used as the first part of information, the 2 bits of information may be used as the second part of information, and the front and back of one bit of information are the same.

For example, for a specific example of 3 bits of the first information (a2, a1, a0), the first partial information may be a0, and the second partial information may be a1 and a 2. For another example: the first partial information may be a0 and a1, and the second partial information may be a 2. The following steps are repeated: the first partial information may be a0 and a1, and the second partial information may be a1 and a 2. If it is 2 bits of first information (a1, a0) information, the first part information may be a0 and the second part information may be a 1.

For another example, if the first information is 110, the first part of information may be "1" again, and the second part of information is "10". Or if the first information is 110, the first part of information may be "11" again, and the second part of information is "0".

When the first information is divided into two parts, one part is called first part information, and the other part is called second part information, the first part information can be carried by sequence parameters of a reference signal sequence of a demodulation reference signal, and modulation symbols of the reference signal sequence carry the second part information; or the sequence parameter of the reference signal sequence carries the first part of information, and the resource mapping mode of the demodulation reference signal carries the second part of information; or, the modulation symbol of the reference signal sequence carries the first part of information, and the resource mapping mode of the demodulation reference signal carries the second part of information.

Accordingly, the communication device 120 may determine the first partial information according to the sequence parameter of the reference signal sequence of the demodulation reference signal, and determine the second partial information according to the modulation symbol of the reference signal sequence; or determining the first part of information according to the sequence parameter of the reference signal sequence, and determining the second part of information according to the resource mapping mode of the demodulation reference signal; or, determining the first part of information according to the modulation symbol of the reference signal sequence, and determining the second part of information according to the resource mapping mode of the demodulation reference signal.

The implementation manner in which the sequence parameter of the reference signal sequence of the demodulation reference signal carries the first part of information may refer to the implementation manner in which the sequence parameter of the reference signal sequence of the previous demodulation reference signal carries all the information of the first information. For example, "all information of the first information" is replaced with the first partial information.

Similarly, the implementation manner in which the modulation symbol of the reference signal sequence of the demodulation reference signal carries the first part of information may refer to the implementation manner in which the modulation symbol of the reference signal sequence of the previous demodulation reference signal carries all the information of the first information. For example, the entire information of the first information is replaced with the first partial information.

For example, when the first information includes 3 bits of information in total, the first part of information may be 2 bits of information, and in this case, a QPSK modulation symbol may be generated and then multiplied by a symbol of the reference signal sequence. Thus, the modulation symbols of the reference signal sequence carry the 2 bits of the first part of information.

Similarly, the implementation manner in which the modulation symbol of the reference signal sequence of the demodulation reference signal carries the second part of information may refer to the implementation manner in which the modulation symbol of the reference signal sequence of the previous demodulation reference signal carries all the information of the first information. For example, the whole information of the first information is replaced with the second partial information.

For example, when the first information includes 3 bits of information in total, the second part of information may be 1 bit of information, and in this case, one BPSK modulation symbol may be generated and then multiplied by a symbol of the reference signal sequence. Thus, the modulation symbols of the reference signal sequence carry 1 bit of the second part of information.

Similarly, the implementation manner in which the resource mapping manner of the demodulation reference signal carries the second part of information may refer to the implementation manner in which the resource mapping manner of the previous demodulation reference signal carries all the information of the first information. For example, the "entire information of the first information" is replaced with the second partial information.

When the demodulation reference signal on one time domain symbol carries all information in the first information, the communication device 110 may divide the first information into three parts, one part is referred to as first part information, one part is referred to as second part information, and one part is referred to as third part information. At this time, the sequence parameter of the reference signal sequence on the demodulation reference signal carries the first part of information, the modulation symbol of the reference signal sequence carries the second part of information, and the resource mapping mode of the demodulation reference signal carries the third part of information.

Accordingly, the communication device 120 may determine the first partial information according to the sequence parameter of the reference signal sequence on the demodulation reference signal, determine the second partial information according to the modulation symbol of the reference signal sequence, and determine the third partial information according to the resource mapping manner of the demodulation reference signal.

For example, when the first information includes 3 bits of information, the first part of information, the second part of information, and the third part of information may include one bit, respectively.

Similarly, the implementation manner in which the resource mapping manner of the demodulation reference signal carries the third part of information may refer to the implementation manner in which the resource mapping manner of the previous demodulation reference signal carries all the information of the first information. For example, the "entire information of the first information" is replaced with the third partial information.

When the communication device 110 divides the first information into two parts, one part is referred to as first part information, and the other part is referred to as second part information, the demodulation reference signals generated by the communication device 110 according to the first information and the cell identifier may be two demodulation reference signals, one demodulation reference signal may be referred to as a first demodulation reference signal, and the other demodulation reference signal may be referred to as a second demodulation reference signal. The demodulation reference signal generated by the communication device 110 according to the first information and the cell identifier may include: the communication device 110 generates a first demodulation reference signal according to the cell identifier and the first part of information, where the first demodulation reference signal carries the first part of information; and generating a second demodulation reference signal according to the cell identifier and the second part of information, wherein the second demodulation reference signal carries the second part of information.

Accordingly, the communication device 110 transmits the demodulation reference signal, which may include: the communication device 110 transmits the first demodulation reference signal and the second demodulation reference signal. The communication device 120 receives the demodulation reference signal, and may include: the communication device 120 receives the first demodulation reference signal and the second demodulation reference signal.

When the first demodulation reference signal carries the first part of information, the method may include: carrying first part information by sequence parameters of a reference signal sequence of a first demodulation reference signal; or the modulation symbol of the reference signal sequence of the first demodulation reference signal carries the first part of information; or the resource mapping mode of the first demodulation reference signal carries the first part of information.

Accordingly, the communication device 120 may determine the first partial information according to a sequence parameter of a reference signal sequence of the first demodulation reference signal; or determining the first part of information according to the modulation symbols of the reference signal sequence of the first demodulation reference signal; or determining the first part of information according to the resource mapping mode of the first demodulation reference signal.

The implementation manner in which the sequence parameter of the reference signal sequence of the first demodulation reference signal carries the first part of information may refer to the implementation manner in which the sequence parameter of the reference signal sequence of the demodulation reference signal carries all the information of the first part of information. For example, "all information of the first information" is replaced with the first partial information.

Similarly, the implementation manner in which the modulation symbol of the reference signal sequence of the first demodulation reference signal carries the first part of information may refer to the implementation manner in which the modulation symbol of the reference signal sequence of the demodulation reference signal carries all the information of the first information. For example, "all information of the first information" is replaced with the first partial information.

For example, when the first information includes 3 bits of information in total, the first part of information may be 2 bits of information, and in this case, a QPSK modulation symbol may be generated and then multiplied by a symbol of a reference signal sequence of the first demodulation reference signal. Thus, the modulation symbols of the reference signal sequence of the first demodulation reference signal carry the 2-bit first partial information.

Similarly, the implementation manner in which the resource mapping manner of the first demodulation reference signal carries the first part of information may refer to the implementation manner in which the resource mapping manner of the previous demodulation reference signal carries all the information of the first information. For example, "all information of the first information" is replaced with the first partial information.

When the second demodulation reference signal carries the second part of information, the method may include: the sequence parameter of the reference signal sequence of the second demodulation reference signal carries second part information; or the modulation symbol of the reference signal of the second demodulation reference signal carries the second part of information; or the resource mapping mode of the second demodulation reference signal carries the second part of information.

Accordingly, the communication device 120 may determine the second partial information according to the sequence parameter of the reference signal sequence of the second demodulation reference signal; or determining the second part of information according to the modulation symbol of the reference signal of the second demodulation reference signal; or determining the second part of information according to the resource mapping mode of the second demodulation reference signal.

The implementation manner in which the sequence parameter of the reference signal sequence of the second demodulation reference signal carries the second part of information may refer to the implementation manner in which the sequence parameter of the reference signal sequence of the demodulation reference signal carries all the information of the first information. For example, the "entire information of the first information" is replaced with the second partial information.

Similarly, the implementation manner in which the modulation symbol of the reference signal sequence of the second demodulation reference signal carries the second part of information may refer to the implementation manner in which the modulation symbol of the reference signal sequence of the demodulation reference signal carries all the information of the first information. For example, the "entire information of the first information" is replaced with the second partial information.

For example, when the first information includes 3 bits of information in total, the second part of information may be 1 bit of information, and in this case, one modulation symbol of BPSK may be generated and then multiplied by a symbol of the reference signal sequence of the second demodulation reference signal. Thus, the modulation symbols of the reference signal sequence of the second demodulation reference signal carry the 2-bit second partial information.

Similarly, the implementation manner in which the resource mapping manner of the second demodulation reference signal carries the second part of information may refer to the implementation manner in which the resource mapping manner of the previous demodulation reference signal carries all the information of the first information. For example, the "entire information of the first information" is replaced with the second partial information.

A specific example of an implementation manner in which the modulation symbol of the reference signal sequence of the first demodulation reference signal carries the first part of information, and the modulation symbol of the reference signal sequence of the second demodulation reference signal carries the second part of information in the first information is given below.

And the two PBCH DMRS respectively bear part of information in the first information, and the sum of the information borne by the two PBCH DMRS symbols is all the information of the first information.

In particular, there are different sub-embodiments. For example, the first information is 3 bits, and the 3 bits of information can be carried in any one of the following manners.

Sub-mode 1: (x, y) ═ (BPSK, QPSK).

Sub-mode 2: (x, y) ═ BPSK QPSK, QPSK).

Sub-mode 3: (x, y) ═ BPSK QPSK, conj (QPSK)).

In the sub-mode 1, one DMRS uses BPSK to carry 1 bit, and the other DMRS uses QPSK to carry 2 bits, so that 3 bits of information can be transmitted in total.

In the sub-scheme 2, one DMRS uses BPSK and QPSK to carry 3 bits, and the other DMRS uses QPSK to carry 2 bits, so that 3 bits of information can be transmitted in total. Where the QPSK in 2 symbols carries the same information.

In the sub-scheme 3, one DMRS uses BPSK and QPSK to carry 3 bits, and the other DMRS uses QPSK conjugate to carry 2 bits, so that 3 bits of information can be transmitted in total. Where the QPSK in 2 symbols carries the same information. Where conj (x) denotes the conjugation of complex number x.

A specific example that the first demodulation reference signal carries the first part of the first information and the second demodulation reference signal carries the second part of the second information is given below.

For example, the time domain symbols occupied by the first demodulation reference signal and the second demodulation reference signal may be different, and in this case, the reference signal sequences on the first demodulation reference signal and the second demodulation reference signal may be different. Specifically, the communication device 110 may generate the reference signal sequences on the first demodulation reference signal and the second demodulation reference signal according to the following formula:

d(n)＝[1-2x₀((n+m₀)modL)][1-2x₁((n+m₁)modL)]

0≤m₀<N_PCID-1

0≤n<L

wherein x is₀And x₁May be a predefined sequence; n is a radical of_PCIDIs the total number of cells; m is₀Is x₀The cyclic shift value of (2) may be a cell identity of the current cell; m is₁Is x₁The cyclic shift value of (a); l is the length of sequence d minus 1; mod represents the modulus; a is a pre-defined constant value that is,

indicating a rounding down. l_PBCHRepresenting the first demodulation reference signal or the second solutionAnd adjusting the identification of the time domain symbol where the reference signal is located. The sequence d may be directly used as a reference signal sequence, or may be further processed to obtain the reference signal sequence.

Alternatively, the communication device 110 may also generate the reference signal sequences on the first demodulation reference signal and the second demodulation reference signal according to the following formula:

d(n)＝[1-2x₀((n+m₀)modL)][1-2x₁((n+m₁)modL)]

m₀＝n_ID+n_x

0≤n_ID<N_PCID-1

0≤n<L

wherein x is₀And x₁May be a predefined sequence; n is a radical of_PCIDIs the total number of cells; m is₀Is x₀The cyclic shift value of (a); n is_IDA cell identity representing a cell; m is₁Is x₁The cyclic shift value of (a); l is the length of sequence d minus 1; mod represents the modulus; a is a pre-defined constant value that is,

indicating a rounding down. l_PBCHAn identifier representing a time domain symbol in which the first demodulation reference signal or the second demodulation reference signal is located; n is_xAnd represents the time domain resource identification of the first demodulation reference signal or the second demodulation reference signal. The sequence d may be directly used as a reference signal sequence, or may be further processed to obtain the reference signal sequence.

For another example, when the modulation symbol on the reference signal sequence of the first demodulation reference signal carries the first part of information in the first information, and the modulation symbol on the reference signal sequence of the second demodulation reference signal carries the second part of information in the first information, a possible implementation manner is shown in fig. 6. Where the squares with the letter "a" represent REs carrying demodulation reference signals.

As can be seen from fig. 6, the reference signal sequence r of the first demodulation reference signal₁(n) multiplying the modulation symbol x generated according to the first part of information, that is, carrying the modulation symbol x on the reference signal sequence of the first demodulation reference signal; reference signal sequence r of second demodulation reference signal₂(n) is multiplied by a modulation symbol y generated from the second partial information, that is, the modulation symbol y is carried on the reference signal sequence of the second demodulation reference signal.

If the first information is 3 bits of information in total, x may be a BPSK modulation symbol, and y may be a QPSK modulation symbol, so that the first demodulation reference signal may carry 1 bit of information, and the second demodulation reference signal may carry 2 bits of information.

As shown in fig. 7, if the resource mapping scheme of the first demodulation reference signal indicates "0" when the first demodulation reference signal is mapped from the high frequency resource unit to the low frequency resource unit, and the resource mapping scheme of the first demodulation reference signal indicates "1" when the first demodulation reference signal is mapped from the low frequency resource unit to the high frequency resource unit, the first demodulation reference signal may carry 1-bit information in the first information. Where the squares with the letter "a" represent REs carrying demodulation reference signals.

If the resource mapping manner of the second demodulation reference signal indicates "0" when the second demodulation reference signal is mapped from the high frequency resource unit to the low frequency resource unit, and the resource mapping manner of the second demodulation reference signal indicates "1" when the second demodulation reference signal is mapped from the low frequency resource unit to the high frequency resource unit, the second demodulation reference signal may carry another 1-bit information in the first information.

When the first demodulation reference signal carries the first part of information, the second part of information may be carried by time domain orthogonal cover mask sequences of two reference signal sequences, namely, a first reference signal sequence of the first demodulation reference signal and a second reference signal sequence of the second demodulation reference signal.

As shown in fig. 8, a reference signal sequence r on the first demodulation reference signal₁(n) one in frequency domain resourceThe sequence value on each resource block is multiplied by 1, and the reference signal sequence r on the second demodulation reference signal₂(n) multiplying the sequence value on the corresponding resource block in the same frequency domain resource by-1, so that the first reference signal sequence and the second reference signal sequence can jointly carry '0' in the 1-bit second partial information; r is₁(n) the sequence value over one resource block in the frequency domain resources is multiplied by 1, and r₂(n) the sequence value on the corresponding resource block in the same frequency domain resource is multiplied by 1, then the first reference signal sequence and the second reference signal sequence can jointly carry "1" in the 1-bit second partial information.

Fig. 9 is a schematic configuration diagram of a communication apparatus according to an embodiment of the present application. It should be understood that the communication device 900 shown in fig. 9 is only an example, and the communication device of the embodiment of the present application may further include other modules or units, or include modules having functions similar to those of the respective modules in fig. 9, or not include all the modules in fig. 9.

A processing module 910, configured to generate a demodulation reference signal according to first information and a cell identifier of a cell, where the first information indicates a time domain position of a synchronization signal in the cell.

A sending module 920, configured to send the demodulation reference signal.

Optionally, the processing module 910 may be specifically configured to:

generating a sequence parameter of a reference signal sequence on the demodulation reference signal according to all information in the first information and the cell identifier; or

Generating a reference signal sequence on the demodulation reference signal according to the cell identifier; generating modulation symbols carried on the generated reference signal sequence according to all the first information; or

Generating a reference signal sequence on the demodulation reference signal according to the cell identifier; determining a resource mapping mode of the demodulation reference signal according to all information in the first information; or

Generating a sequence parameter of a reference signal sequence on the demodulation reference signal according to a first part of information in the first information and the cell identifier, and generating a modulation symbol carried on the reference signal sequence according to a second part of information in the first information, wherein the first part of information and the second part of information form the first information; or

Generating a sequence parameter of a reference signal sequence on the demodulation reference signal according to a first part of information in the first information, and determining a resource mapping mode of the demodulation reference signal according to a second part of information in the first information, wherein the first part of information and the second part form all information in the first information; or

Generating a reference signal sequence on the demodulation reference signal according to the cell identifier; and generating a modulation symbol carried on the reference signal sequence according to a first part of information in the first information, and determining a resource mapping mode of the demodulation reference signal according to a second part of information in the first information, wherein the first part of information and the second part of information form the first information.

Optionally, the sequence parameters of the reference signal sequence on the demodulation reference signal include one or more of: an initial value of a sequence, a cyclic shift value of a sequence, a root sequence number of the reference signal sequence.

Optionally, the processing module 910 may be specifically configured to: generating a first cyclic shift value according to the cell identifier;

generating a second cyclic shift value according to the first information and the first cyclic shift value; and generating a reference signal sequence on the demodulation reference signal according to the first cyclic shift value and the second cyclic shift value.

Optionally, the processing module 910 may be specifically configured to: generating a first cyclic shift value according to the cell identifier; generating a second cyclic shift value according to the first information and the cell identifier; and generating a reference signal sequence on the demodulation reference signal according to the first cyclic shift value and the second cyclic shift value.

Optionally, the processing module 910 may be specifically configured to: generating a second cyclic shift value according to the cell identifier and the first information; generating a first cyclic shift value according to the cell identifier and a second cyclic shift value; and generating a reference signal sequence on the demodulation reference signal according to the first cyclic shift value and the second cyclic shift value.

Optionally, the processing module 910 may be specifically configured to: generating a third sequence according to the first cyclic shift value and the second cyclic shift value; taking the third sequence as the reference signal sequence; or truncating a section of the third sequence as the reference signal sequence; or performing cyclic shift on the third sequence to obtain the reference signal sequence; or splicing the third sequence with another sequence to obtain the reference signal sequence.

Optionally, the processing module 910 may be specifically configured to: taking the cell identification as an initial value of a fourth sequence; and intercepting a segment of sequence carrying the first information from the fourth sequence according to the first information to serve as a reference signal sequence carried on the demodulation reference signal.

Optionally, the processing module 910 may be specifically configured to: generating an initial value of a fourth sequence according to the first information and the cell identifier; and intercepting a sequence from the fourth sequence as a reference signal sequence carried on the demodulation reference signal.

Optionally, the processing module 910 may be specifically configured to: generating a first demodulation reference signal according to a first part of information in the first information and the cell identifier; generating a second demodulation reference signal according to a second part of information in the first information and the cell identifier, wherein the first part of information and the second part of information form the first information; the sending module 920 may be specifically configured to: transmitting the first demodulation reference signal and the second demodulation reference signal.

The communication device shown in fig. 9 may perform each step performed by the communication device 110 in the communication method shown in fig. 2, that is, technical features of the communication device 110 in the communication method shown in fig. 2 may also be applied to the communication device shown in fig. 9, and for brevity, details are not described here again.

Fig. 10 is a schematic configuration diagram of a communication apparatus according to an embodiment of the present application. It should be understood that the communication device 1000 shown in fig. 10 is only an example, and the communication device of the embodiment of the present application may further include other modules or units, or include modules having functions similar to those of the respective modules in fig. 10, or not include all the modules in fig. 10.

A receiving module 1010, configured to receive a demodulation reference signal.

A processing module 1020, configured to determine first information according to a cell identifier of a cell and the demodulation reference signal, where the first information indicates a time domain position of a synchronization signal in the cell.

Optionally, the processing module 1020 may be specifically configured to:

determining the first information according to the cell identifier and a sequence parameter of a reference signal sequence on the demodulation reference signal; or

Determining the first information according to the cell identifier and a modulation symbol carried on a reference signal sequence on the demodulation reference signal; or

Determining the first information according to the cell identifier and the resource mapping mode of the demodulation reference signal; or

Determining a reference signal sequence on the demodulation reference signal according to the cell identifier; determining a first part of information in the first information according to a sequence parameter of a reference signal sequence on the demodulation reference signal; determining second part information in the first information according to modulation symbols carried on the reference signal sequence, wherein the first part information and the second part information form the first information; or

Determining a reference signal sequence on the demodulation reference signal according to the cell identifier; determining a first part of information in the first information according to a sequence parameter of a reference signal sequence on the demodulation reference signal, and determining a second part of information in the first information according to a resource mapping mode of the demodulation reference signal, wherein the first part of information and the second part form all information in the first information; or

Determining a reference signal sequence on the demodulation reference signal according to the cell identifier; determining a first part of information in the first information according to modulation symbols carried on a reference signal sequence on the demodulation reference signal, and determining a second part of information in the first information according to a resource mapping mode of the demodulation reference signal, wherein the first part of information and the second part of information form the first information.

Optionally, the processing module 1020 may be specifically configured to: determining a first cyclic shift value according to the cell identifier; determining a second cyclic shift value according to a reference signal sequence carried on the demodulation reference signal and the first cyclic shift value; determining the first information according to the first cyclic shift value and the second cyclic shift value.

Optionally, the processing module 1020 may be specifically configured to: determining a first cyclic shift value according to the cell identifier;

determining a second cyclic shift value according to a reference signal sequence carried on the demodulation reference signal and the first cyclic shift value; and determining the first information according to the second cyclic shift value and the cell identifier.

Optionally, the processing module 1020 may be specifically configured to: determining a third sequence according to a reference signal sequence carried on the demodulation reference signal; determining the second cyclic shift value according to the third sequence, the first sequence, the second sequence and the first cyclic shift value.

Optionally, the processing module 1020 may be specifically configured to: determining a first cyclic shift value and a second cyclic shift value according to a reference signal sequence carried on the demodulation reference signal; determining the first information according to the cell identifier and the first cyclic shift value.

Optionally, the processing module 1020 may be specifically configured to: generating an initial value of a fourth sequence according to the cell identifier; and determining the first information according to the reference signal sequence carried on the demodulation reference signal and the fourth sequence.

Optionally, the processing module 1020 may be specifically configured to: and determining first information according to the reference signal sequence on the demodulation reference signal, a fourth sequence, the identifier of the cell and an initial value of the fourth sequence, wherein the reference signal sequence on the demodulation reference signal is a segment of sequence in the fourth sequence.

Optionally, the receiving module 1010 may be specifically configured to: receiving a first demodulation reference signal and a second demodulation reference signal; the processing module 1020 may specifically be configured to: determining a first part of information in the first information according to the cell identifier and the first demodulation reference signal; and determining second part information in the first information according to the cell identifier and the second demodulation reference signal, wherein the first part information and the second part information form the first information.

The communication device shown in fig. 10 may perform each step performed by the communication device 120 in the communication method shown in fig. 2, that is, technical features of the communication device 120 in the communication method shown in fig. 2 may also be applied to the communication device shown in fig. 10, and for brevity, details are not described here again.

Fig. 11 is a schematic configuration diagram of a communication apparatus according to an embodiment of the present application. It should be understood that the communication device 1100 shown in fig. 11 is only an example, and the communication device of the embodiment of the present application may further include other modules or units, or include modules having functions similar to those of the respective modules in fig. 11, or not include all the modules in fig. 11.

Processor 1130 may be configured to implement the operations or steps that processing module 910 of fig. 9 can implement, and transmitter 1110 may be configured to implement the operations or steps that transmitting module 920 of fig. 9 can implement.

Optionally, the communication device 1100 may also include a receiver 1120. Receiver 1120 may be used to receive information transmitted by other communication devices.

The receiver 1120 and the transmitter 1110 may be integrated together and referred to as a transceiver.

The communication device shown in fig. 11 may also include a memory for storing program code executed by the processor. Memory may be integrated within processor 1130, among other things.

Fig. 12 is a schematic configuration diagram of a communication apparatus according to an embodiment of the present application. It should be understood that the communication device 1200 shown in fig. 12 is only an example, and the communication device of the embodiment of the present application may further include other modules or units, or include modules having functions similar to those of the respective modules in fig. 12, or not include all the modules in fig. 12.

Among other things, the processor 1230 may be used to implement the operations or steps that the processing module 1020 in fig. 10 can implement, and the receiver 1220 may be used to implement the operations or steps that the receiving module 1010 in fig. 10 can implement.

Optionally, the communication device 1200 may further comprise a transmitter 1210. The transmitter 1210 may be used to transmit information to other communication devices.

The receiver 1220 and the transmitter 1210 may be integrated together and referred to as a transceiver.

The communication device shown in fig. 12 may also include a memory for storing program code executed by the processor. Processor 1230 may have memory integrated therein.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. a communication method, is characterized in that, comprises:

The demodulation reference signal is generated according to the first information and the cell identity of the cell, the first information indicates the time domain position of the synchronization signal in the cell, wherein the demodulation reference signal is generated according to the first information and the cell identity of the cell signals, including:

generating a sequence parameter of a reference signal sequence on the demodulation reference signal according to all the information in the first information and the cell identity; or

generating a reference signal sequence on the demodulation reference signal according to the cell identifier; generating a modulation symbol carried on the generated reference signal sequence according to all the information in the first information; or

generating a reference signal sequence on the demodulation reference signal according to the cell identifier; determining a resource mapping manner of the demodulation reference signal according to all the information in the first information; or

The sequence parameter of the reference signal sequence on the demodulation reference signal is generated according to the first part of the information in the first information and the cell identifier, and the reference signal sequence carried on the reference signal is generated according to the second part of the information in the first information. a modulation symbol on a signal sequence, the first part of the information and the second part of the information make up the first information; or

The sequence parameters of the reference signal sequence on the demodulation reference signal are generated according to the first part of the information in the first information, and the resource mapping mode of the demodulation reference signal is determined according to the second part of the information in the first information , the first part of the information and the second part constitute all the information in the first information; or

Generate a reference signal sequence on the demodulation reference signal according to the cell identifier; generate a modulation symbol carried on the reference signal sequence according to the first part of the information in the first information, The second part of the information determines the resource mapping mode of the demodulation reference signal, and the first part of the information and the second part of the information form the first information;

The demodulation reference signal is transmitted.

2. The communication method according to claim 1, wherein the generating a demodulation reference signal according to the first information and a cell identity of the cell comprises:

generating a first cyclic shift value according to the cell identifier;

generating a second cyclic shift value according to the first information and the first cyclic shift value;

A reference signal sequence on the demodulation reference signal is generated according to the first cyclic shift value and the second cyclic shift value.

3. The communication method according to claim 1, wherein the generating a demodulation reference signal according to the first information and a cell identity of the cell comprises:

generating a first cyclic shift value according to the cell identifier;

generating a second cyclic shift value according to the first information and the cell identity;

4. The communication method according to claim 1, wherein the generating a demodulation reference signal according to the first information and a cell identity of the cell comprises:

generating a second cyclic shift value according to the cell identity and the first information;

generating a first cyclic shift value according to the cell identity and the second cyclic shift value;

5. The communication method according to any one of claims 2 to 4, wherein generating the demodulation reference signal according to the first cyclic shift value and the second cyclic shift value The reference signal sequence, including:

generating a third sequence according to the first cyclic shift value and the second cyclic shift value;

using the third sequence as the reference signal sequence; or

Truncate a segment of the third sequence as the reference signal sequence; or

cyclically shifting the third sequence to obtain the reference signal sequence; or

The reference signal sequence is obtained by splicing the third sequence with another sequence.

6. The communication method according to claim 1, wherein the generating a demodulation reference signal according to the first information and a cell identity of the cell comprises:

using the cell identity as the initial value of the fourth sequence;

According to the first information, a segment of the sequence carrying the first information is intercepted from the fourth sequence, as a reference signal sequence carried on the demodulation reference signal.

7. The communication method according to claim 1, wherein the generating a demodulation reference signal according to the first information and a cell identity of the cell comprises:

generating an initial value of a fourth sequence according to the first information and the cell identity;

A sequence is cut out from the fourth sequence as a reference signal sequence carried on the demodulation reference signal.

8. The communication method according to claim 1, wherein the generating a demodulation reference signal according to the first information and a cell identity of the cell comprises:

generating a first demodulation reference signal according to the first part of the information in the first information and the cell identifier;

generating a second demodulation reference signal according to the second part of the information in the first information and the cell identifier, the first part of the information and the second part of the information form the first information;

The sending the demodulation reference signal includes:

The first demodulation reference signal and the second demodulation reference signal are transmitted.

9. The communication method according to claim 1, wherein the sequence parameters of the reference signal sequence on the demodulation reference signal comprise one or more of the following: an initial value of the sequence, a cyclic shift value of the sequence, The root sequence number of the reference signal sequence.

10. A communication method, comprising:

receive a demodulation reference signal;

The first information is determined according to the cell identity of the cell and the demodulation reference signal, the first information indicates the time domain position of the synchronization signal in the cell, wherein the first information is determined according to the cell identity of the cell and the demodulation reference signal The signal determines the first information, including:

determining the first information according to the cell identity and the sequence parameter of the reference signal sequence on the demodulation reference signal; or

determining the first information according to the cell identity and the modulation symbols carried on the reference signal sequence on the demodulation reference signal; or

determining the first information according to the cell identifier and the resource mapping manner of the demodulation reference signal; or

Determine the reference signal sequence on the demodulation reference signal according to the cell identifier; determine the first part of the first information according to the sequence parameter of the reference signal sequence on the demodulation reference signal; the modulation symbol carried on the signal sequence to determine the second part of the information in the first information, and the first part of the information and the second part of the information form the first information; or

Determine the reference signal sequence on the demodulation reference signal according to the cell identifier; determine the first part of the information in the first information according to the sequence parameter of the reference signal sequence on the demodulation reference signal; The resource mapping method of the reference signal determines the second part of the information in the first information, and the first part of the information and the second part constitute all the information in the first information; or

Determine the reference signal sequence on the demodulation reference signal according to the cell identifier; determine the first part of the information in the first information according to the modulation symbol carried on the reference signal sequence on the demodulation reference signal, according to the The resource mapping manner of the demodulation reference signal determines the second part of the information in the first information, and the first part of the information and the second part of the information constitute the first information.

The communication method according to claim 10, wherein the determining the first information according to the cell identifier of the cell and the demodulation reference signal comprises:

determining a first cyclic shift value according to the cell identifier;

determining a second cyclic shift value according to the reference signal sequence carried on the demodulation reference signal and the first cyclic shift value;

The first information is determined according to the first cyclic shift value and the second cyclic shift value.

12. The communication method according to claim 10, wherein the determining the first information according to the cell identity of the cell and the demodulation reference signal comprises:

determining a first cyclic shift value according to the cell identifier;

The first information is determined according to the second cyclic shift value and the cell identity.

13. The communication method according to claim 11 or 12, wherein the second cyclic shift value is determined according to the reference signal sequence carried on the demodulation reference signal and the first cyclic shift value, include:

determining a third sequence according to the reference signal sequence carried on the demodulation reference signal;

The second cyclic shift value is determined from the third sequence, the first sequence, the second sequence and the first cyclic shift value.

determining a first cyclic shift value and a second cyclic shift value according to the reference signal sequence carried on the demodulation reference signal;

The first information is determined according to the cell identity and the first cyclic shift value.

15. The communication method according to claim 10, wherein the determining the first information according to the cell identity of the cell and the demodulation reference signal comprises:

generating an initial value of the fourth sequence according to the cell identifier;

The first information is determined according to the reference signal sequence carried on the demodulation reference signal and the fourth sequence.

The first information is determined according to the reference signal sequence on the demodulation reference signal, the fourth sequence, the identity of the cell, and the initial value of the fourth sequence, where the reference signal sequence on the demodulation reference signal is the A sequence in the fourth sequence.

17. The communication method according to claim 10, wherein the receiving a demodulation reference signal comprises:

receiving a first demodulation reference signal and a second demodulation reference signal;

Wherein, the determining the first information according to the cell identifier of the cell and the demodulation reference signal includes:

determining the first part of information in the first information according to the cell identity and the first demodulation reference signal;

The second part of the information in the first information is determined according to the cell identifier and the second demodulation reference signal, and the first part of the information and the two parts of information form the first information.

18. A communication device, comprising:

A processing module, configured to generate a demodulation reference signal according to first information and a cell identifier of a cell, where the first information indicates a time domain position of a synchronization signal in the cell, wherein the processing module is specifically configured to:

A sending module, configured to send the demodulation reference signal.

19. The communication device according to claim 18, wherein the processing module is specifically configured to:

generating a first cyclic shift value according to the cell identifier;

20. The communication device according to claim 18, wherein the processing module is specifically configured to:

generating a first cyclic shift value according to the cell identifier;

21. The communication device according to claim 18, wherein the processing module is specifically configured to:

22. The communication device according to any one of claims 19 to 21, wherein the processing module is specifically configured to:

using the third sequence as the reference signal sequence; or

Truncate a segment of the third sequence as the reference signal sequence; or

23. The communication device according to claim 18, wherein the processing module is specifically configured to:

using the cell identity as the initial value of the fourth sequence;

24. The communication device according to claim 18, wherein the processing module is specifically configured to:

25. The communication device according to claim 18, wherein the processing module is specifically configured to:

The sending module is specifically used for:

26 . The communication device according to claim 18 , wherein the sequence parameters of the reference signal sequence on the demodulation reference signal comprise one or more of the following: an initial value of the sequence, a cycle of the sequence Shift value, the root sequence number of the reference signal sequence.

27. A communication device, comprising:

a receiving module for receiving the demodulation reference signal;

A processing module, configured to determine first information according to the cell identifier of the cell and the demodulation reference signal, where the first information indicates the time domain position of the synchronization signal in the cell, wherein the processing module is specifically configured to:

The reference signal sequence on the demodulation reference signal is determined according to the cell identifier; the first part of the information in the first information is determined according to the modulation symbol carried on the reference signal sequence on the demodulation reference signal, according to the The resource mapping manner of the demodulation reference signal determines the second part of the information in the first information, and the first part of the information and the second part of the information constitute the first information.

28. The communication device according to claim 27, wherein the processing module is specifically configured to:

determining a first cyclic shift value according to the cell identifier;

29. The communication device according to claim 27, wherein the processing module is specifically configured to:

determining a first cyclic shift value according to the cell identifier;

30. The communication device according to claim 28 or 29, wherein the processing module is specifically configured to:

31. The communication device according to claim 27, wherein the processing module is specifically configured to:

32. The communication device according to claim 27, wherein the processing module is specifically configured to:

33. The communication device according to claim 27, wherein the processing module is specifically configured to:

34. The communication device according to claim 27, wherein the receiving module is specifically configured to:

Wherein, the processing module is specifically used for:

35. A communication system, characterized in that the communication system comprises the communication device according to any one of claims 18 to 26 and the communication device according to any one of claims 27 to 34.

36. A computer-readable storage medium for storing a computer program, characterized in that the computer program is used for executing instructions of the method according to any one of claims 1 to 17.