CN102710376B - Method and device for transmitting uplink control information - Google Patents

Abstract

The invention discloses a method and a device for transmitting uplink control information. The method comprises the following steps: when uplink control information UCI is transmitted on a physical uplink shared channel PUSCH of multiple digits, determining the digit corresponding to the UCI in the multiple digits according to a predetermined rule; and mapping the UCI to the corresponding digit to transmit. The device comprises a determining module and a transmitting module. According to the invention, the problem of transmitting the UCI on the PUSCH of the multiple digits is solved, and the method and the device are easily realized on the basis of LTE R8 without additionally adding many standardized jobs.

Description

Method and device for transmitting uplink control information

technical field

The present invention relates to the field of wireless communication, in particular to a method and device for transmitting uplink control information, in particular to a method and device for transmitting uplink control information on a physical uplink shared channel of multiple codewords.

Background technique

In the LTE (Long Term Evolution, Long Term Evolution) R8 wireless communication system, in order to support dynamic scheduling, downlink MIMO (Multiple Input Multiple Output, Multiple Input Multiple Output) transmission and hybrid automatic retransmission and other technologies, terminals need to pass PUCCH (Physical Uplink Control Channel (Physical Uplink Control Channel) and PUSCH (Physical Uplink Share Channel, Physical Uplink Shared Channel) feed back a variety of UCI (Uplink Control Information, uplink control information) to the base station, such as channel quality indication, coding matrix indication and hybrid automatic Confirmation information for retransmission, etc. Specifically, the UCI fed back through PUSCH includes: CQI (Channel Quality Information, channel quality information), RI (Rank Indication, rank indication) and HARQ-ACK (Hybrid Automatic Repeat request-Acknowledgment, hybrid automatic repeat request confirmation information) . Wherein, the CQI includes channel quality indication and coding matrix indication information when the MIMO transmission mode is closed-loop space division multiplexing and MU-MIMO (multi-user MIMO), and it is channel quality indication information in other transmission modes.

In the LTE R8 version, PUSCH only supports one codeword (Codeword) in a TTI (Transmission Time Interval, transmission time interval), and the codeword corresponds to the channel-coded bits of a transmission block. When UCI and data need to be sent through PUSCH within the same TTI, the specific implementation steps are as follows:

1) The terminal calculates the number of modulation symbols occupied by various UCIs;

2) The terminal calculates the number of bits encoded by various UCI channels;

3) The terminal performs channel coding related processing on data, CQI, RI and HARQ-ACK respectively, then multiplexes the coded data and coded CQI, and finally combines the multiplexed bits with the coded bits of RI and HARQ-ACK - The encoded bits of the ACK are channel interleaved;

4) The terminal performs a series of processes such as scrambling, modulation, DFT (Discrete Fourier Transform, discrete Fourier Transform) and resource mapping on the bits after channel interleaving and sends them to the base station;

5) The base station performs corresponding processing after receiving it, and separates the CQI, RI and HARQ-ACK information transmitted with the data through de-channel interleaving and de-multiplexing;

6) The base station performs de-channel coding to judge whether the UCI transmission is correct, and if it is correct, the original information bits of the transmitted CQI, RI and HARQ-ACK can be obtained.

The above method is a method for transmitting UCI when PUSCH supports one codeword in one TTI. With the development of technology, PUSCH can support multiple codewords in one TTI. When using the spatial multiplexing technology of domain layer permutation, the PUSCH can support a maximum of two codewords in one TTI. Therefore, it is necessary to study the method of transmitting UCI when the PUSCH can support multiple codewords in one TTI. How UCI is transmitted on the PUSCH of multiple codewords is a new problem, and there is no relevant prior art at present.

Contents of the invention

In order to solve the problem of transmitting UCI on PUSCHs with multiple codewords, the embodiments of the present invention provide a method and device for transmitting uplink control information. Described technical scheme is as follows:

A method for transmitting uplink control information, comprising:

When transmitting the uplink control information UCI on the physical uplink shared channel PUSCH of multiple codewords, according to a preset rule, determine the codeword corresponding to the UCI among the multiple codewords;

Map the UCI to the corresponding codeword for transmission.

A device for transmitting uplink control information, comprising:

A determining module, configured to, when transmitting uplink control information UCI on a physical uplink shared channel PUSCH of multiple codewords, determine a codeword corresponding to UCI among multiple codewords according to a preset rule;

The transmission module is configured to map the UCI to corresponding codewords for transmission.

The technical solution provided by the embodiment of the present invention solves the problem of how to transmit UCI on the PUSCH of multiple codewords, and the solution can be easily realized based on LTE R8 without adding too much additional standardization work.

Description of drawings

FIG. 1 is a flowchart of a method for transmitting uplink control information provided by an embodiment of the present invention;

FIG. 2 is a flowchart of a method for transmitting uplink control information provided by Embodiment 1 of the present invention;

Fig. 3 is a flow chart of the processing procedure after each part of the divided UCI is mapped to its corresponding codeword for transmission and received by the base station according to Embodiment 1 of the present invention;

FIG. 4 is a flow chart of a process related to data and UCI channel coding performed by a terminal provided in Embodiment 1 of the present invention;

FIG. 5 is a schematic diagram of positions of data and UCI in one TTI after channel interleaving provided by Embodiment 1 of the present invention;

FIG. 6 is a flowchart of a method for transmitting uplink control information provided by Embodiment 2 of the present invention;

FIG. 7 is a schematic flow diagram of transmitting one UCI on two codewords provided by Embodiment 2 of the present invention;

FIG. 8 is a flowchart of a method for transmitting uplink control information provided by Embodiment 3 of the present invention;

FIG. 9 is a flowchart of a method for transmitting uplink control information provided by Embodiment 4 of the present invention;

FIG. 10 is a structural diagram of a device for transmitting uplink control information provided in Embodiment 5 of the present invention;

FIG. 11 is another structural diagram of the device for transmitting uplink control information provided by Embodiment 5 of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Referring to FIG. 1, an embodiment of the present invention provides a method for transmitting uplink control information, including:

101: When transmitting uplink control information UCI on the physical uplink shared channel PUSCH of multiple codewords, determine the codeword corresponding to the UCI among the multiple codewords according to a preset rule;

102: Map the UCI to a corresponding codeword for transmission.

The above method solves the problem of how to transmit UCI on multiple codewords, can support LTE R8 version, LTE R9 version and higher versions, and fills the gap in related technologies in this field. When applied to the LTE R8 version, since there is only one codeword, the codeword is directly determined as the codeword corresponding to the UCI, and the UCI is mapped to the codeword for transmission.

The UCI in the embodiment of the present invention can be any type of UCI, including but not limited to: CQI, RI, HARQ-ACK or channel information, etc., which is not specifically limited in the embodiment of the present invention. In the embodiment of the present invention, there may be one or multiple UCIs to be transmitted. One UCI refers to control information corresponding to one control information encoding code block. When there are multiple UCIs to be transmitted, the types of any two UCIs in the multiple UCIs can be the same or different, for example: there are 3 UCIs, all of which are CQI; or, one is CQI and one is RI, One is HARQ-ACK.

There are many preset rules in the embodiment of the present invention, including but not limited to: one UCI is mapped to one codeword for transmission, one UCI is divided into multiple parts and mapped to multiple codewords for transmission, and multiple UCIs are mapped to a codeword for transmission, etc., which are not specifically limited in this embodiment of the present invention. The following four embodiments are used to describe in detail, and the preset rule in the embodiment of the present invention may be any one of the following four embodiments.

Example 1

Referring to Figure 2, this embodiment provides a method for transmitting uplink control information, which divides a UCI into multiple parts and then transmits them with multiple codewords, specifically including:

201: When transmitting UCI on the PUSCH of multiple codewords, for one UCI to be transmitted, divide the UCI into multiple parts, the number of the multiple parts is equal to the number of the multiple codewords, and each The portion corresponds to one of the codewords.

For example, there are two codewords: codeword 1 and codeword 2, and one UCI is divided into two parts, UCI1 and UCI2, wherein UCI1 corresponds to codeword 1, and UCI2 corresponds to codeword 2.

Wherein, the method of dividing one UCI into multiple parts is not specifically limited in this embodiment of the present invention. The lengths of any two parts among the divided parts may be the same or different.

202: Map each divided part of the UCI to its corresponding codeword for transmission.

In this embodiment, the processing flow of each part after UCI division is the same, referring to Fig. 3, the process of the above-mentioned 202 is specifically as follows:

301: Take each divided part of the UCI as a current part, and calculate the number Q′ of modulation symbols occupied by the current part of the UCI.

Specifically, if the current part of UCI is HARQ-ACK or RI, the following formula (1) is used for calculation, and if the current part of UCI is CQI, the following formula (2) is used for calculation.

Among them, O is the number of bits of UCI's current part of the original information; is the transmission bandwidth of PUSCH when the same transmission block is initially transmitted; is the number of SC-FDMA occupied when the same transmission block is initially transmitted; It is the offset of the current part of UCI relative to the MCS (Modulation and Coding Scheme, modulation and coding scheme) of the data; is the transmission bandwidth of PUSCH; K _r is the sum of the number of information bits of the rth code block and the number of CRC check bits; C is the number of code blocks; It is the number of SC-FDMA occupied by the same transmission block; Q _RI is the number of modulation symbols occupied by RI; L is the number of bits of CRC parity bits, and the value of L is 0 when CQI is RM coded, and convolution is performed The value of L during encoding is 8; Q _m is the modulation order; when UCI is HARQ-ACK, When UCI is RI, ${\mathrm{\β}}_{\mathrm{offset}}^{\mathrm{PUSCH}}={\mathrm{\β}}_{\mathrm{offset}}^{\mathrm{RI}};$ When UCI is CQI, ${\mathrm{\β}}_{\mathrm{offset}}^{\mathrm{PUSCH}}={\mathrm{\β}}_{\mathrm{offset}}^{\mathrm{CQI}}.$

302: Calculate the number of bits after channel coding of the current part of the UCI.

Specifically, formula (3) can be used for calculation:

Q=Q _m Q′ (3)

Among them, Q is the number of bits after channel coding of the current part of UCI, Q _m is the modulation order, and Q′ is the number of modulation symbols occupied by the current part of UCI.

303: Perform channel coding-related processing on the transmission block, that is, the data to be transmitted, CQI, RI, and HARQ-ACK, multiplex the encoded data and the encoded CQI, and then combine the multiplexed bits with the RI The coded bits of the HARQ-ACK and the coded bits of the HARQ-ACK are channel interleaved.

304: After performing a series of processing such as scrambling, modulation, DFT transformation, and resource mapping, the bits after channel interleaving are sent to the base station to complete UCI transmission.

The series of processing refers to the relevant processing performed between the terminal and the base station for wireless transmission. This processing method is the same as the processing when the terminal side only sends service data without UCI, so it will not be described again.

After the above-mentioned processing is performed on each part of the UCI divided, the step of sending is performed. Therefore, for N codewords, after dividing a UCI into N parts and mapping them to the N codewords respectively, the mapped signal, and then the terminal sends the signal to the base station. Wherein, N is a natural number, and N≥2.

In this embodiment, further, after the terminal completes the UCI transmission, the following steps may also be included:

305: After the base station receives the signal from the terminal, it performs a series of processing on the signal, and separates the UCI information transmitted with the data through de-channel interleaving and de-multiplexing; de-channel coding, judges whether the UCI transmission is correct, and if it is correct, obtains Original information bits of the current part of the UCI transmitted by the terminal.

306: After obtaining the UCI part transmitted with each codeword, that is, N UCI parts, the base station combines the original information bits of the N parts together to obtain the complete UCI transmitted by the terminal, thus completing the UCI transmission.

Referring to FIG. 4, the above step 303 may specifically include:

401: Add a CRC check digit to the transmission block;

402: Divide the transmission block to obtain each code block, and add a CRC check bit to each code block;

403: Perform channel coding on each code block;

404: Perform rate matching on the channel-coded code blocks.

405: Concatenate the rate-matched code blocks together.

In addition, channel coding is also performed on the UCI, wherein performing channel coding on the UCI includes: performing channel coding on the CQI, performing channel coding on the RI, or performing channel coding on the HARQ-ACK. This step is not limited to the order of 401-405 above. If the UCI is CQI, it only needs to be done before 406. If the UCI is RI or HARQ-ACK, it only needs to be done before 407.

406: Multiplexing the data after code block concatenation and the CQI after channel coding;

407: Perform channel interleaving on the multiplexed bits, the channel-coded RI, and the channel-coded HARQ-ACK.

Wherein, channel interleaving makes the time-frequency positions of data and control information in one TTI after PUSCH resource mapping are roughly as shown in FIG. 5 . Each small square in the figure represents a time-frequency resource unit (Resource Element), the horizontal axis represents the time domain, and the vertical axis represents the frequency domain.

The above method provided by this embodiment solves the problem of how to transmit UCI on the PUSCH of multiple codewords. Dividing one UCI into multiple parts, each of which is encoded with a different codeword and then transmitted, can make full use of the transmit power of the terminal. For example, the maximum total transmit power of the terminal is 23dBm, and the maximum transmit power of the two antennas on it is 20dBm. Using the method of this embodiment, the UCI is divided into two parts and transmitted with 2 codewords. All antennas have UCI transmission, in this case the maximum transmission power of UCI can reach 23dBm. If the UCI is not divided into two parts, but is transmitted with one of the codewords, the UCI is only transmitted on one antenna at the same time. At this time, the maximum transmit power of the UCI can only reach 20dBm. It can be seen that the The method can make full use of the transmitting power of the terminal. In addition, the method of this embodiment can reuse the relevant standards of the LTE R8 version and the transmission and reception processing flow in the implementation to the greatest extent, maintain backward compatibility, and can easily implement the solution based on LTE R8 without additional Too much standardized work.

Example 2

Since a UCI is divided into multiple parts for encoding in Embodiment 1, compared to LTE R8, the implementation complexity is increased, and the performance of UCI is limited by the performance of multiple parts, and the probability of UCI being correctly received will be lower than The probability that either part is received correctly. Therefore, referring to FIG. 6, this embodiment provides another method for transmitting uplink control information. In a manner different from that of Embodiment 1, the channel-coded UCI is divided into multiple parts and then transmitted with multiple codewords respectively. Specifically include:

601: When UCI is transmitted on the PUSCH of multiple codewords, for a UCI to be transmitted, perform channel coding on the UCI;

Specifically, the process of channel coding the UCI is as follows:

1) Calculate the number Q' of the modulation symbols occupied by the UCI on each codeword. If the above UCI is HARQ-ACK or RI, use the following formula (4) for calculation. If the above UCI is CQI, use the following The formula (5) is calculated. Equations (4) and (5) are amendments to the corresponding equations in LTE R8.

In this embodiment, the UCI occupies the same number of modulation symbols on each codeword, all of which are Q′.

Among them, O is the number of bits of UCI's current part of the original information; is the transmission bandwidth of PUSCH when the same transmission block is initially transmitted; is the number of SC-FDMA occupied when the same transmission block is initially transmitted; is the offset of the current part of UCI relative to the MCS; is the transmission bandwidth of PUSCH; K _r is the sum of the number of information bits and the number of CRC check bits of the rth code block of the ith codeword; C _i is the number of code blocks of the ith codeword; N _CW is the code the number of words; is the number of SC-FDMA occupied by the same transmission block; is the number of modulation symbols occupied by RI on each codeword; L is the number of bits of the CRC check bit, the value of L is 0 when CQI is RM coded, and the value of L is 8 when convolutional coding is performed; Q _m is the modulation order; when UCI is HARQ-ACK, When UCI is RI, ${\mathrm{\β}}_{\mathrm{offset}}^{\mathrm{PUSCH}}={\mathrm{\β}}_{\mathrm{offset}}^{\mathrm{RI}};$ When UCI is CQI, ${\mathrm{\β}}_{\mathrm{offset}}^{\mathrm{PUSCH}}={\mathrm{\β}}_{\mathrm{offset}}^{\mathrm{CQI}}.$

Since in this embodiment, UCI is firstly channel-coded and then divided into multiple parts, channel coding is only done once, and it can be seen from formulas (4) and (5) that only one The value can be calculated, no need for multiple and It is notified to the terminal by the base station, so it can be seen that this embodiment can save signaling overhead.

2) Calculate the number of bits Q after the above UCI channel coding.

Specifically, formula (6) can be used for calculation:

$\mathrm{<span\; class="notranslate">\; Q</span>}<span\; class="notranslate">\; =</span>\underset{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0</span>}}{\overset{{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; CW</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{\mathrm{<span\; class="notranslate">\; Q</span>}}_{\mathrm{<span\; class="notranslate">\; mi</span>}}<span\; class="notranslate">\; \&Center\; Dot;</span>{\mathrm{<span\; class="notranslate">\; Q</span>}}^{<span\; class="notranslate">\; \&prime;</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 6</span>}<span\; class="notranslate">\; )</span>$

Among them, Q is the number of bits after UCI channel coding, Q _mi is the modulation order of the i-th codeword, and Q′ is the number of modulation symbols occupied by UCI on each codeword.

3) Based on the number of bits Q after UCI channel coding, channel coding is performed on the UCI.

602: Divide the channel-coded UCI into multiple parts, where the number of the multiple parts is equal to the number of the multiple codewords, and each part corresponds to one codeword in the multiple codewords.

For example, there are N codewords, N is a natural number, and N≥2, the UCI after channel coding is divided into N parts: UCI1, UCI2, ..., UCIN, corresponding to codeword 1, codeword 2, . . . . codeword N.

There are multiple methods for dividing the channel-coded UCI into multiple parts, which is not specifically limited in this embodiment of the present invention. One method is that the number of bits occupied by each part on its corresponding codeword is calculated by Q _mi ·Q', which represents the number of bits occupied by the i-th part on its corresponding i-th codeword.

603: Map each divided part to its corresponding codeword for transmission.

The process is as follows:

1) Perform channel coding on the transport block on each codeword respectively, and for each codeword, multiplex the coded data with the part corresponding to the codeword after CQI channel coding, and then multiplex the coded data Channel interleaving is performed on the used bits with the part corresponding to the codeword separated after RI channel coding, and the part corresponding to the codeword separated after HARQ-ACK channel coding;

2) After a series of processing such as scrambling, modulation, DFT transformation and resource mapping, the bits after channel interleaving are sent to the base station. This step is the same as 304, and will not be repeated here;

3) After the base station receives the signal from the terminal, it performs a series of processing on the signal, and de-channel interleaves and demultiplexes each code word to separate the information of the UCI part transmitted with each code word, N code words A total of N UCI parts are obtained.

4) After merging the N UCI parts obtained above, channel decoding is performed. If the decoding is correct, the original information bits of the UCI transmitted by the terminal are obtained, thereby completing the transmission of the UCI.

Referring to FIG. 7 , taking two codewords as an example, the specific implementation process of the above method provided by this embodiment is described. The transmission blocks on the two codewords are respectively channel-coded, and UCI is used for channel coding, including: CQI, RI, and HARQ-ACK; after channel coding, they are divided into two parts, of which one part is mapped to the first codeword for transmission, and the other One part is mapped to the second codeword for transmission. After receiving it, the base station de-channel interleaves and demultiplexes to obtain two parts of UCI, which are combined and then channel-decoded to obtain the original information bits of UCI transmitted by the terminal.

The above method provided by this embodiment solves the problem of how to transmit UCI on the PUSCH of multiple codewords. Dividing one UCI into multiple parts after channel coding, each of which is transmitted with a different codeword, can make full use of the transmit power of the terminal, and the reason is the same as that described in Embodiment 1. Compared with Embodiment 1, the complexity of implementation is reduced, the performance of UCI is improved, and the solution can be easily realized based on LTE R8 without adding too much standardization work. Since in this embodiment, UCI is firstly channel-coded and then divided into multiple parts, channel coding is only done once, and it can be seen from formulas (4) and (5) that only one The value can be calculated, no need for multiple and It is notified to the terminal by the base station, so it can be seen that this embodiment can save signaling overhead.

Example 3

Since the transmission and reception process of LTE R8 UCI needs to be modified when transmitting on PUSCH in embodiment 2, it is not conducive to reusing the algorithm of LTE R8, and it is necessary to modify the formula of LTE R8 to calculate the number of modulation symbols occupied by UCI and the number of bits after UCI channel coding , that is, formulas (4) and (5), usually, the number of original information bits of RI and HARQ-ACK is small, such as 1~2bit, at this time, in order to allow it to be transmitted with multiple codewords, additional repetitions may be required Coding, resulting in unnecessary waste of resources. In order to solve the above problems, this embodiment provides another method for transmitting uplink control information, which is different from the methods in Embodiments 1 and 2, and transmits by mapping a UCI to a codeword, see Figure 8, specifically including :

801: When UCI is transmitted on the PUSCH of multiple codewords, for one UCI to be transmitted, determine the codeword specified in the multiple codewords as the codeword corresponding to the UCI;

Wherein, the specified codeword can be a codeword specified by the terminal, or a codeword indicated by the uplink authorization UL Grant, or a codeword notified by the base station signaling, such as through RRC (Radio Resource Control, radio resource control ) signaling notification. Specifically, the UL Grant can explicitly or implicitly indicate the codeword through one of the fields, such as explicitly indicating the codeword by adding a new field in the UL Grant, or implicitly indicating the codeword through the MCS field, the terminal The corresponding codeword can be determined according to the value of the MCS field. The UL Grant is obtained by the terminal by receiving downlink control signaling from the base station.

802: Map the UCI to a corresponding codeword for transmission.

Specifically, the process may include:

1) Based on the MCS of the determined codeword, calculate the number of modulation symbols occupied by the above UCI, if the UCI is HARQ-ACK or RI, use formula (1) to calculate, if the UCI is CQI, then use formula (2) calculate.

2) Calculate the number of bits after the UCI channel coding, based on the number of UCI occupied modulation symbols calculated in the previous step, and use formula (3) for calculation.

3) Perform channel coding-related processing, multiplexing, and channel interleaving on UCI and data, and then send them to the base station after a series of processing such as scrambling, modulation, DFT transformation, and resource mapping, which is the same as 303-304, and will not be repeated here repeat.

5) After the base station receives the signal from the terminal, it separates the UCI transmitted with the codeword through de-channel interleaving and de-multiplexing, performs de-channel coding, and judges whether the UCI transmission is correct. If it is correct, it obtains the information of the UCI transmitted by the terminal. The information is the same as 305 and will not be repeated here.

The above method provided by this embodiment solves the problem of how to transmit UCI on the PUSCH of multiple codewords. A UCI is mapped to a codeword for transmission. Compared with Embodiment 2, the algorithm of LTE R8 does not need to be modified, and the relevant standards of the LTE R8 version and the transmission and reception processing procedures in the implementation can be reused to the greatest extent, maintaining the post- Directional compatibility, and the solution can be easily implemented based on LTE R8, without adding too much additional standardization work. Moreover, for UCI with less original information bits, additional repetitive coding can be avoided, saving resources.

Example 4

In the embodiment of the present invention, the UCI to be transmitted by the terminal may be UCI for one downlink carrier, or UCI for multiple downlink carriers. Wherein, the UCI of multiple downlink carriers may adopt independent coding or joint coding, and the joint coding includes UCI joint coding of all downlink carriers, or UCI joint coding of some downlink carriers. During independent coding, the UCI of each downlink carrier will be channel coded separately. When joint coding is performed, the UCIs of multiple downlink carriers that are jointly coded are combined for one channel coding.

On the basis of Embodiment 3, this embodiment provides a method for transmitting uplink control information in addition to the method provided in Embodiment 3 when there are multiple UCIs to be transmitted by the terminal, as shown in FIG. 9 , specifically including :

901: When multiple UCIs are transmitted on the PUSCH of multiple codewords, for multiple UCIs of the same type among the UCIs to be transmitted, determine the codeword corresponding to each UCI among multiple codewords according to preset rules , the preset rules are as follows:

If the number M of multiple UCIs of the same type is divided by the number N of codewords to form an integer, the M UCIs are divided into N groups, each group corresponds to a codeword in the N codewords, and each Each group contains M/N UCIs; for example, M=4, N=2, then M/N=2, therefore, divide 4 UCIs into two groups, each group contains 2 UCIs, the first group corresponds to the One codeword, the second group corresponds to the second codeword;

If M<N and M/N is not an integer, select M codewords from the N codewords in the specified order, and map M UCIs to the M codewords, where each UCI corresponds to a Codeword; for example, M=2, N=3, then select 2 codewords according to the specified order from 3 codewords, and correspond 2 UCIs to the 2 codewords, and the remaining codeword No UCI information, only data transmission;

If M>N and M/N is not an integer, the quotient is X, and the remainder is Y, divide M UCIs into N groups, each group corresponds to one of the N codewords, and each group contains X UCI, and then select Y codewords according to the specified order from the N codewords, and map the remaining Y UCIs after grouping to the Y codewords, wherein each UCI corresponds to a codeword; for example, M=7, N=3, then the M/N quotient is 2, and the remainder is 1. UCI is divided into 3 groups, each group includes 2 UCIs, and the 3 groups correspond to 3 codewords respectively. At this time, 1 UCI, select a codeword according to the specified order from the 3 codewords, and correspond the remaining 1 UCI to the selected 1 codeword, if there are multiple UCIs left, such as Z, then Select Z codewords according to the specified order, and map the remaining Z UCIs to the Z codewords.

Wherein, M, N, X, Y and Z are all natural numbers, and N≥2.

The specified order involved in the above steps is specifically: according to the order of MCS corresponding to each codeword from high to low, or according to the order of MCS corresponding to each codeword from low to high.

902: Map the above multiple UCIs to respective codewords for transmission.

In this embodiment, in the above rules, further, the terminal can map one of the above multiple UCIs to a specified codeword for transmission, and the specified codeword can be a codeword specified by the terminal, or a codeword specified by the UL Grant A codeword indicated or implicitly indicated by a field in , or a codeword notified by signaling from the base station. That is, while satisfying the foregoing rules, the terminal can also ensure that one of the UCIs is mapped to a specified codeword.

The above method provided by this embodiment maps multiple UCIs to corresponding codewords evenly and in a specified order for transmission, without dividing the UCI into parts, and maps one or more UCIs to one codeword, which solves how to The problem of transmitting multiple UCIs on the PUSCH of multiple codewords, and can reuse the relevant standards of the LTE R8 version and the transmission and reception processing procedures in the implementation to the greatest extent, maintain backward compatibility, and can be compared based on LTE R8 This scheme is easily implemented without much additional standardized work. By mapping multiple UCIs to multiple codewords, it is avoided that multiple UCIs are mapped to one codeword, resulting in a large amount of resources being occupied by UCIs, few resources available for data, and a very small amount of data carried. In addition, if multiple UCIs are mapped to one codeword, when the data transmission fails this time, the small amount of data needs to be retransmitted on the same resource as this time, if there is no new UCI to be transmitted during retransmission , there will be a scene where data is retransmitted at a very low bit rate, resulting in unnecessary waste of resources. Therefore, the method of this embodiment can also effectively reduce unnecessary waste of resources caused by data retransmission.

Example 5

Referring to Figure 10, this embodiment provides an apparatus for transmitting uplink control information, including:

The determination module 1001 is configured to determine a codeword corresponding to UCI among multiple codewords according to a preset rule when transmitting UCI on the PUSCH of multiple codewords;

The transmission module 1002 is configured to map the UCI to corresponding codewords for transmission.

Referring to Figure 11, in this embodiment, the determination module 1001 may specifically include:

The first determining unit 1001a is configured to, when transmitting UCI on the PUSCH of multiple codewords, for a UCI to be transmitted, determine the codeword specified in the multiple codewords as the codeword corresponding to the UCI, and the specified code The word is a codeword specified by the terminal, or a codeword indicated by the UL Grant, or a codeword notified by the base station signaling. Among them, the UL Grant can explicitly or implicitly indicate the codeword through one of the fields.

Or, the determining module 1001 specifically includes:

The second determination unit 1001b is configured to, when transmitting UCI on the PUSCH of multiple codewords, divide the UCI into multiple parts for one UCI to be transmitted, and the number of multiple parts is equal to the number of multiple codewords , and each part corresponds to one codeword among multiple codewords.

Or, the determining module 1001 specifically includes:

The third determining unit 1001c is configured to, when transmitting UCI on PUSCHs of multiple codewords, perform channel coding on the UCI for one UCI to be transmitted, and divide the channel-coded UCI into multiple parts. The number is equal to the number of multiple codewords, and each part corresponds to one codeword among the multiple codewords.

Or, the determining module 1001 specifically includes:

The fourth determination unit 1001d is configured to transmit UCI on the PUSCH of multiple codewords, for the multiple UCIs of the same type in the UCI to be transmitted, if the number M of the multiple UCIs of the same type is equal to the codeword The number N is divided into an integer, then the M UCIs are divided into N groups, each group corresponds to a code word in the N code words, and each group contains M/N UCIs; if M<N and M /N is not an integer, select M codewords from the N codewords in the specified order, and map M UCIs to the M codewords, where each UCI corresponds to a codeword; if M> N and M/N is not an integer, the quotient is X, and the remainder is Y, then the M UCIs are divided into N groups, each group corresponds to one of the N codewords, and each group contains X UCIs, Then select Y codewords from the N codewords according to the specified order, and map the remaining Y UCIs after grouping to the Y codewords, wherein each UCI corresponds to a codeword; M and N are Natural numbers, and N≥2.

Wherein, for the second determination unit 1001b or the third determination unit 1001c, at this time, the transmission module 1002 specifically includes:

The transmission unit 1002a is configured to map each part of the UCI to its corresponding codeword for transmission.

In this embodiment, the specified order is specifically: according to the order of MCS corresponding to each codeword from high to low, or according to the order of MCS corresponding to each codeword from low to high.

Any of the foregoing devices provided in this embodiment may be integrated into a terminal, and the terminal communicates with the base station in a wireless manner.

The above method provided by this embodiment solves the problem of how to transmit one or more UCIs on the PUSCH of multiple codewords, and can reuse the relevant standards of the LTE R8 version and the transmission and reception processing flow in the implementation to the greatest extent, The backward compatibility is maintained, and the solution can be easily implemented based on LTE R8, without adding too much additional standardization work. Mapping multiple UCIs to multiple codewords can increase available data resources and effectively reduce unnecessary waste of resources caused by data retransmission.

All or part of the above-mentioned technical solutions provided by the embodiments of the present invention can be completed by program instructions related hardware, and the program can be stored in a readable storage medium, and the storage medium includes: ROM, RAM, magnetic disk or optical disk Various media that can store program codes.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (16)

1. A method for transmitting uplink control information, characterized in that the method comprises: When transmitting uplink control information UCI on the physical uplink shared channel PUSCH of multiple codewords, according to preset rules, determine the codeword corresponding to the UCI among the multiple codewords; Mapping the UCI to the corresponding codeword for transmission; wherein, according to preset rules, determining the codeword corresponding to the UCI in the plurality of codewords specifically includes: For a UCI to be transmitted, determining a codeword specified in the plurality of codewords as a codeword corresponding to the UCI to be transmitted; The specified codeword is a codeword indicated by the uplink authorization UL Grant; wherein, The codeword indicated by the UL Grant includes: A codeword implicitly indicated by the modulation and coding scheme MCS field in the UL Grant. 2. The method according to claim 1, wherein the codeword implicitly indicated by the MCS domain in the UL Grant comprises: A codeword determined according to the value of the MCS field in the UL Grant. 3. The method according to claim 1 or 2, wherein the UCI includes channel quality information. 4. The method according to claim 1 or 2, wherein when the UCI is hybrid automatic repeat transmission acknowledgment information HARQ-ACK or rank indication RI, the UCI occupies modulation symbols on each codeword of the same number. 5. A device for transmitting uplink control information, characterized in that the device comprises: A determining module, configured to, when transmitting uplink control information UCI on a physical uplink shared channel PUSCH of multiple codewords, determine a codeword corresponding to the UCI among the multiple codewords according to a preset rule; A transmission module, configured to map the UCI to the corresponding codeword for transmission; wherein, the determination module specifically includes: The first determining unit is configured to, when transmitting UCI on the PUSCH of multiple codewords, for one UCI to be transmitted, determine the specified codeword among the multiple codewords as the one corresponding to the one UCI to be transmitted A codeword, the specified codeword is a codeword indicated by the uplink authorization UL Grant; wherein, The codeword indicated by the UL Grant includes: A codeword implicitly indicated by the modulation and coding scheme MCS field in the UL Grant. 6. The device according to claim 5, wherein the codeword implicitly indicated by the MCS field in the UL Grant comprises: A codeword determined according to the value of the MCS field in the UL Grant. 7. The device according to claim 5 or 6, wherein the UCI includes channel quality information. 8. The device according to claim 5 or 6, wherein when the UCI is hybrid automatic repeat transmission acknowledgment information HARQ-ACK or rank indication RI, the UCI occupies modulation symbols on each codeword of the same number. 9. A method for acquiring uplink control information, comprising: Receive uplink control information UCI transmitted on the physical uplink shared channel PUSCH of multiple codewords; According to preset rules, determine a codeword corresponding to the UCI among the plurality of codewords; Obtain the UCI according to the codeword corresponding to the UCI; wherein, The codeword corresponding to the UCI is a codeword indicated by the uplink authorization UL Grant; wherein, The codeword indicated by the UL Grant includes: A codeword implicitly indicated by the modulation and coding scheme MCS field in the UL Grant. 10. The method according to claim 9, wherein the codeword implicitly indicated by the MCS field in the UL Grant comprises: A codeword determined according to the value of the MCS field in the UL Grant. 11. The method according to claim 9 or 10, wherein the UCI includes channel quality information. 12. The method according to claim 9 or 10, wherein when the UCI is hybrid automatic repeat transmission acknowledgment information HARQ-ACK or rank indication RI, the UCI occupies modulation symbols on each codeword of the same number. 13. A device for acquiring uplink control information, comprising: The receiving unit is configured to receive the uplink control information UCI transmitted on the physical uplink shared channel PUSCH of multiple codewords; A determining unit, configured to determine a codeword corresponding to the UCI among the plurality of codewords according to preset rules; An acquiring unit, configured to acquire the UCI according to the codeword corresponding to the UCI; wherein, The codeword corresponding to the UCI is a codeword indicated by the uplink authorization UL Grant; wherein, The codeword indicated by the UL Grant includes: A codeword implicitly indicated by the modulation and coding scheme MCS field in the UL Grant. 14. The device according to claim 13, wherein the codeword implicitly indicated by the MCS field in the UL Grant includes: A codeword determined according to the value of the MCS field in the UL Grant. 15. The apparatus according to claim 13 or 14, wherein the UCI includes channel quality information. 16. The device according to claim 13 or 14, wherein when the UCI is hybrid automatic repeat transmission acknowledgment information HARQ-ACK or rank indication RI, the UCI occupies modulation symbols on each codeword of the same number.