CN105635018B - Function indication method, device and system - Google Patents

Abstract

The invention discloses a method, a device and a system for function indication, wherein the method for function indication adopts the method of sending an instruction loaded in a channel or a signal to UE (user equipment), wherein the channel or the signal is the channel or the signal which needs to be received before receiving PDSCH (physical Downlink shared channel) or PDCCH (physical Downlink control channel) data when the UE is initially accessed into a network, the instruction is used for indicating whether the network supports a preset function, and the PDSCH data comprises the following steps: the PDSCH data carrying the broadcasted system parameters of the UE and the PDSCH data carrying the unicast service solve the problem of unnecessary power loss of coverage enhancement MTC UE, thereby avoiding excessive power loss of the MTC UE.

Description

Method, device and system for function indication

technical field

The present invention relates to the field of communications, and in particular, to a method, device and system for function indication.

Background technique

Machine Type Communication (MTC for short) or Machine to Machine (M2M for short) User Equipment (UE for short) is the main application form of the Internet of Things at this stage. Low power consumption/low cost is an important guarantee for its large-scale application. The M2M devices currently deployed on the market are mainly based on the Global System of Mobile communication (GSM for short) system. In recent years, due to the higher spectral efficiency of the Long Term Evolution (LTE) system, and more and more mobile operators have determined LTE as the evolution direction of the future broadband wireless communication system, there are many types of LTE-based M2M. The data business will also be more attractive.

The cost of user equipment (including MTC UE) mainly comes from two parts: baseband processing part and radio frequency part. In order to reduce the cost of MTC UEs, reducing the uplink and/or downlink transmission bandwidth (including baseband and radio frequency bandwidth) of the UE is a very effective way to reduce the cost of MTC UEs, for example, setting the uplink and/or downlink transmission bandwidth of all MTC UEs It can only be narrow-band bandwidth such as 1.4MHz (even if the system bandwidth is much more than 1.4MHz). In addition to the above bandwidth reduction method, the following methods can also be used to further reduce the cost of the MTC UE: single receive antenna, reduced transmit power, and reduced maximum transport block size (Transport Block Size, TBS for short), etc.

Since some MTC UEs are installed in the basement of residences or in locations shaded by aluminum alloy windows or traditional thick-walled building structures, these UEs experience quite severe penetration loss on the RF interface compared to normal MTC UEs. Therefore, in order to ensure the normal data transmission of the above-mentioned UE, the coverage of the above-mentioned MTC UE needs to be enhanced. The enhanced channel types include: Physical Uplink/Downlink Shared Channel (PUSCH/PDSCH for short) and Physical Uplink/Downlink Control Channel (PUCCH/PDCCH for short), etc. The coverage enhancement of the physical downlink shared channel PDSCH includes: coverage enhancement of broadcast system information block (System Information Block, SIB for short) data and coverage enhancement of unicast service data. In order to accumulate more energy to improve coverage, iterative methods are often used to achieve transmission enhancement for various channel types.

Therefore, low-cost MTC UEs can be divided into two categories, one is low-cost MTC equipment with coverage enhancement requirements (ie, coverage-enhanced MTC UEs), such as smart metering equipment, and the other is non- MTC devices with enhanced coverage requirements (ie conventional MTC UEs), such as consumer electronic devices. Currently, it is not mandatory for all cells to support MTC devices with enhanced coverage. In this case, in order to identify whether the cell supports the MTC device with enhanced coverage, the existing method is to make an MTC device with enhanced coverage first obtain the synchronization signal and the master information block (Master Information Block) of the cell through Keep Trying. Block, MIB for short), and then try to obtain the public SIB data related to coverage enhancement according to the MIB information. If the SIB data cannot be obtained within the determined time period limit, the coverage enhancement MTC device considers that the cell is not available. Coverage-enhanced MTC devices; the above approach results in excessive and unnecessary power consumption for coverage-enhancing MTC devices, since the UE has to try for a long time to receive public coverage-enhancing-related SIB data that may not exist.

In the related art, no effective solution has been proposed for the problem of unnecessary power consumption of the coverage enhancement MTC device.

SUMMARY OF THE INVENTION

The present invention provides a method, device and system for function indication to solve at least one of the above problems.

According to one aspect of the present invention, there is provided a method for function indication, which is used for machine type communication (MTC), comprising: sending an instruction carried in a channel or signal to a UE, wherein the channel or signal is the initial connection of the UE. The channel or signal that needs to be received before receiving PDSCH or PDCCH data when entering the network, the instruction is used to indicate whether the network supports a preset function, and the PDSCH data includes: the PDSCH data that carries the broadcast system parameters of the UE, and PDSCH data carrying unicast services.

Further, the preset function includes: an MTC coverage enhancement function, and the UE is a coverage enhancement MTC UE.

Further, sending an instruction borne in a channel or signal to the UE includes at least one of the following: sending an instruction borne in a primary synchronization signal PSS to the terminal; sending an instruction borne in a physical broadcast channel PBCH to the terminal; Send an instruction carried on a preset defined physical channel to the terminal.

Further, in the case where the instruction is carried in the primary synchronization signal PSS, it includes: the sequence of the PSS is 6, wherein the 6 PSS sequences are associated with the identities in the three different cell groups and the 6 of the signaling. One-to-one correspondence of different combinations.

Further, when the instruction is carried on the physical broadcast channel PBCH, it includes: the PBCH is transmitted on a fixed OFDM symbol of a predefined subframe; when the PBCH is not an existing LTE PBCH In the following, the fixed OFDM symbols of the predefined subframes do not overlap with the resources of the existing LTE PBCH transmission.

Further, in the case where the instruction is carried on a preset defined physical channel, it includes: the preset defined physical channel is transmitted on a fixed OFDM symbol of a predefined subframe; wherein, the fixed OFDM symbol of the predefined subframe The resources are the same as those of the existing LTE PBCH transmission, or, the fixed OFDM symbols of the predefined subframes do not overlap with the resources of the existing LTE PBCH transmission.

Further, the subframes used for the PBCH or the predefined physical channel transmission include: at least one of subframe 0, subframe 4, subframe 5 and subframe 9; and, used for the PBCH transmission where, for subframes 0 and 5, when the PBCH is an existing LTE PBCH, the fixed OFDM symbol is all of the other OFDM symbols except the OFDM symbols occupied by downlink control regions and synchronization signals or part; otherwise, the fixed OFDM symbol is all or part of other OFDM symbols except the OFDM symbols occupied by the existing LTE PBCH, downlink control region and synchronization signal; for subframes 4 and 9, the fixed OFDM symbol It is all or part of other OFDM symbols except the OFDM symbols occupied by the downlink control area; the fixed OFDM symbols used for the transmission of the predefined physical channel, when the fixed OFDM symbols and the resources of the existing LTE PBCH transmission are not When overlapping, wherein, for subframes 0 and 5, the fixed OFDM symbol is all or part of other OFDM symbols except the OFDM symbols occupied by the existing LTE PBCH, downlink control region and synchronization signal; for subframes 4 and 5 9. The fixed OFDM symbols are all or part of other OFDM symbols except the OFDM symbols occupied by the downlink control region.

Further, it includes: when the network supports the MTC coverage enhancement function, the system parameters of the coverage enhancement MTC UE and the system parameters of the conventional MTC UE are transmitted on the same narrowband, wherein the narrowband is a predefined narrowband , or the narrowband indicated by the main information block MIB signaling carried in the PBCH; the total number of system information block SIBs sent by the network on the narrowband is N, where any one of the N SIBs Contains system parameters of coverage enhanced MTC UEs and/or system parameters of regular MTC UEs; the N is a positive integer greater than or equal to 1.

Further, it includes: the first SIB in the N SIBs is transmitted on a predefined subframe, and other SIBs except the first SIB are transmitted according to their respective fixed scheduling periods and scheduling time window sizes, or, according to the The respective scheduling periods and scheduling time window sizes indicated by the fields in the first SIB are transmitted; wherein, the predefined subframes include but are not limited to: subframe 0, subframe 4, subframe 5 and subframe in an even-numbered radio frame at least one of frame 9, at least one of subframe 0, subframe 4, subframe 5, and subframe 9 in odd-numbered radio frames, and subframe 0, subframe 4, subframe 5, and subframe 9 in all radio frames at least one of.

Further, it includes: when the N is equal to 1, the unique SIB includes all system parameters of the coverage-enhanced MTC UE and all system parameters of the regular MTC UE; when the N is greater than 1, the N SIBs The first SIB in contains the system parameters shared by the coverage-enhanced MTC UE and the regular MTC UE, or the system parameters shared by the coverage-enhanced MTC UE and the regular MTC UE and the necessary parameters for controlling the transmission of other SIBs; Any one of the other SIBs except the first SIB in the N SIBs includes system parameters dedicated to the coverage-enhanced MTC UE, or system parameters dedicated to the regular MTC UE; Parameters include but are not limited to scheduling period and scheduling time window size and transmission format.

Further, it includes: when the N is 2, the first SIB includes a system parameter shared by the coverage-enhanced MTC UE and the regular MTC UE, or, the coverage-enhanced MTC UE and the regular MTC UE system parameters and necessary parameters for controlling the transmission of the second SIB; and the second SIB contains system parameters specific to the coverage-enhancing MTC UE.

Further, it includes: when the N is 3, the first SIB includes a system parameter shared by the coverage-enhanced MTC UE and the regular MTC UE, or, the coverage-enhanced MTC UE and the regular MTC UE system parameters and necessary parameters for controlling the transmission of the second and third SIBs; and the second and third SIBs or the third and second SIBs contain systems dedicated to the coverage-enhanced MTC UEs and regular MTC UEs, respectively parameter.

Further, it includes: when the network supports the MTC coverage enhancement function, the paging message of the coverage-enhanced MTC UE and the Paging message of the regular MTC UE are transmitted in different narrowbands, and the coverage-enhanced MTC UE and the regular MTC UE are transmitted in different narrowbands. The MTC UE has different paging control channel PCCH system configuration parameters; wherein the different narrowbands are predefined or indicated by the SIB signaling.

Further, it includes: when the network supports the MTC coverage enhancement function, the Paging message uses group coding or independent coding, and the Paging message is transmitted through the enhanced downlink control channel EPDCCH scheduling or no control operation. ; In the case of group coding, in any one of the Paging messages, all the coverage-enhanced MTC UEs that are paged simultaneously use or have the same repetition level.

Further, it includes: acquiring an indication that the UE is in an idle Idle state and a repetition level of a historical Paging message; when it is determined that the UE is in an idle Idle state, the Paging message is transmitted according to an uncontrolled operation, and the Paging message is transmitted from the historical Paging message. The message repetition level starts, and all Paging message repetition levels above the historical Paging message repetition level are used in turn to attempt to transmit the Paging message until the uplink data from the UE is received; when it is determined that the UE is in the idle Idle state, The Paging message is transmitted according to the EPDCCH scheduling mode, and starting from the historical Paging message repetition level, all the Paging message repetition levels above the historical Paging message repetition level are used in turn to attempt to transmit the EPDCCH of the scheduled Paging message and the corresponding Paging message repetition level. Paging message until uplink data from the UE is received.

Further, it includes: in the case that the network supports the MTC coverage enhancement function, the system parameters of the coverage enhancement MTC UE and the system parameters of the regular MTC UE are transmitted in different narrowbands; wherein, through the MIB signal carried in the PBCH order to indicate, or, predefine the coverage-enhanced MTC UE narrowband; or, implicitly determine the coverage-enhanced MTC UE narrowband through the regular MTC UE narrowband.

Further, the system parameters of the coverage-enhanced MTC UE include at least one of the following: a parameter indicating the time-frequency position of the physical random access channel PRACH that is repeatedly transmitted, a parameter indicating a preset defined PRACH format, a parameter indicating the availability of the Paging message The parameter of the subframe, and the parameter indicating the repetition transmission resource or repetition transmission level/number of times of the physical channel.

According to another aspect of the present invention, there is also provided a function indication method for machine type communication (MTC), comprising: UE receiving an instruction carried in a channel or signal, wherein the channel or signal is the initial A channel or signal that needs to be received before receiving PDSCH or PDCCH data when accessing a network, the instruction is used to indicate whether the network supports a preset function, and the PDSCH data includes: PDSCH data that carries the broadcast system parameters of the UE and PDSCH data carrying unicast services.

Further, the preset function includes: an MTC coverage enhancement function, and the UE is a coverage enhancement MTC UE.

Further, receiving an instruction carried in a channel or signal includes at least one of the following: receiving an instruction carried in the primary synchronization signal PSS; receiving an instruction carried in a physical broadcast channel PBCH; receiving an instruction carried in a preset defined physical channel.

Further, in the case where the instruction is carried in the primary synchronization signal PSS, it includes: the sequence of the PSS is 6, wherein the 6 PSS sequences are associated with the identities in the three different cell groups and the 6 of the signaling. One-to-one correspondence of different combinations.

Further, when the instruction is carried on the physical broadcast channel PBCH, it includes: the PBCH is received on a fixed OFDM symbol of a predefined subframe; when the PBCH is not an existing LTE PBCH In the following, the fixed OFDM symbols of the predefined subframes do not overlap with the resources for receiving the existing LTE PBCH.

Further, in the case where the instruction is carried in a preset defined physical channel, it includes: the preset defined physical channel is received on a fixed OFDM symbol of a predefined subframe; wherein, the fixed OFDM symbol of the predefined subframe It is the same as the resource for receiving the existing LTE PBCH, or, the fixed OFDM symbol of the predefined subframe does not overlap with the resource for receiving the existing LTE PBCH.

Further, the subframes used for receiving the PBCH or the predefined physical channel include: at least one of subframe 0, subframe 4, subframe 5 and subframe 9; and, for receiving the PBCH where, for subframes 0 and 5, when the PBCH is an existing LTE PBCH, the fixed OFDM symbol is all of the other OFDM symbols except the OFDM symbols occupied by downlink control regions and synchronization signals or part; otherwise, the fixed OFDM symbol is all or part of other OFDM symbols except the OFDM symbols occupied by the existing LTE PBCH, downlink control region and synchronization signal; for subframes 4 and 9, the fixed OFDM symbol It is all or part of other OFDM symbols except the OFDM symbols occupied by the downlink control area; the fixed OFDM symbols used for receiving the preset defined physical channel, when the fixed OFDM symbols and the existing LTE PBCH transmission resources are not When overlapping, wherein, for subframes 0 and 5, the fixed OFDM symbol is all or part of other OFDM symbols except the OFDM symbols occupied by the existing LTE PBCH, downlink control region and synchronization signal; for subframes 4 and 5 9. The fixed OFDM symbols are all or part of other OFDM symbols except the OFDM symbols occupied by the downlink control region.

Further, when the preset-defined physical channel is used, the sequence in which the coverage-enhanced MTC UE initially accesses the network to receive signals or channels includes: firstly receiving the synchronization signal, then receiving the preset-defined physical channel, and other physical channels. wherein, the synchronization signal includes PSS and secondary synchronization signal SSS; wherein, the other physical channels include: enhanced downlink control channels EPDCCH, PBCH and PDSCH.

Further, the method includes: when the coverage enhancement MTC UE determines according to the instruction that the MTC coverage enhancement function is not supported by the network, the coverage enhancement MTC UE gives up access to the network.

Further, it includes: when the network supports the MTC coverage enhancement function, receiving the system parameters of the coverage enhancement MTC UE in the narrowband shared with the conventional MTC UE; wherein, the narrowband is a predefined narrowband, or according to The narrowband obtained by the MIB signaling of the main information block carried in the PBCH; the total number of system information block SIBs transmitted by the network on the narrowband is N, wherein any one of the N SIBs includes coverage enhancement MTC The system parameter of the UE and/or the system parameter of the conventional MTC UE; the N is a positive integer greater than or equal to 1.

Further, it includes: M SIBs including the coverage-enhancing MTC UE system parameters in the N SIBs, where M is a positive integer greater than or equal to 1 and less than or equal to N; One SIB is received on a predefined subframe, and other SIBs except the first SIB are received according to their respective fixed scheduling periods and scheduling time window sizes, or according to their respective schedules obtained from fields in the first SIB Period and scheduling time window size for receiving; wherein, the predefined subframes include but are not limited to: at least one of subframe 0, subframe 4, subframe 5 and subframe 9 in even-numbered radio frames, and in odd-numbered radio frames At least one of subframe 0, subframe 4, subframe 5, and subframe 9, and at least one of subframe 0, subframe 4, subframe 5, and subframe 9 in all radio frames.

Further, it includes: when the network supports the MTC coverage enhancement function, receiving the Paging message in the determined narrowband according to the PCCH system configuration parameters; wherein, the determined narrowband is predefined, or obtained according to SIB signaling narrowband; the determined narrowband and the PCCH system configuration parameters are different from the narrowband and PCCH system configuration parameters used by conventional MTC UE Paging messages.

Further, it includes: when the network supports the MTC coverage enhancement function, the Paging message is transmitted by using group coding or independent coding, and enhanced downlink control channel EPDCCH scheduling or no control operation; In this case, in any one of the Paging messages, all the coverage-enhanced MTC UEs that are simultaneously paged use or have the same repetition level.

Further, it includes: when the coverage-enhanced MTC UE is in the idle Idle state, if the EPDCCH-based scheduling transmission mode is used, receiving the EPDCCH scheduling the Paging message in a blind detection mode according to the repetition level of the historical Paging message, and then, according to the Receive Paging messages on the EPDCCH that schedules Paging messages; if uncontrolled operation and independent coding transmission mode are used, receive Paging messages in blind detection mode according to historical Paging message repetition level; if uncontrolled operation and group coding transmission mode are used , receive Paging messages in a blind detection manner according to the repetition level of historical Paging messages and the TBS set of potential Paging messages.

Further, it includes: when the network supports the MTC coverage enhancement function, receiving the system parameters of the coverage enhancement MTC UE in a narrowband different from that of the conventional MTC UE; wherein, the narrowband is a predefined narrowband, or according to The narrowband obtained by the MIB signaling carried in the PBCH, or the narrowband implicitly determined according to the conventional MTC UE narrowband.

According to another aspect of the present invention, there is also provided a function indication device for machine type communication (MTC), comprising: a sending module, configured to send an instruction carried in a channel or signal to the UE, wherein the The channel or signal is a channel or signal that needs to be received before receiving PDSCH or PDCCH data when the UE initially accesses the network, the instruction is used to indicate whether the network supports a preset function, and the PDSCH data includes: carrying the UE The PDSCH data of the broadcast system parameters, and the PDSCH data carrying the unicast service.

Further, the preset function includes: an MTC coverage enhancement function, and the UE is a coverage enhancement MTC UE.

According to another aspect of the present invention, there is also provided a function indication device for machine type communication (MTC), comprising: a receiving module for UE to receive an instruction carried in a channel or signal, wherein the channel or signal is a channel or signal that the UE needs to receive before receiving PDSCH or PDCCH data when initially accessing the network, the instruction is used to indicate whether the network supports a preset function, and the PDSCH data includes: a broadcast carrying the UE PDSCH data of system parameters and PDSCH data carrying unicast services.

Further, the preset function includes: an MTC coverage enhancement function, and the UE is a coverage enhancement MTC UE.

According to another aspect of the present invention, there is also provided a function indication system for machine type communication (MTC), including: a base station side, including the device described in any one of the above claims; a terminal side, including any one of the above claims. A device of the kind described.

According to the present invention, an instruction carried in a channel or signal is sent to the UE, wherein the channel or signal is the channel or signal that the UE needs to receive before receiving PDSCH or PDCCH data when the UE initially accesses the network, and the instruction uses In order to indicate whether the network supports a preset function, the PDSCH data includes: PDSCH data carrying system parameters broadcast by the UE, and PDSCH data carrying unicast services, which solves the coverage enhancement MTC UE unnecessary power consumption problem, thereby avoiding excessive power consumption of the MTC UE.

Description of drawings

The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

FIG. 1 is a flowchart 1 of a method for function indication according to an embodiment of the present invention;

2 is a schematic diagram of available fixed OFDM symbols of a predefined subframe according to an embodiment of the present invention;

3 is a second flowchart of a method for function indication according to an embodiment of the present invention;

4 is a structural block diagram 1 of an apparatus for function indication according to an embodiment of the present invention;

FIG. 5 is a second structural block diagram of an apparatus for function indication according to an embodiment of the present invention.

Detailed ways

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and in conjunction with embodiments. It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict.

A method for function indication is provided in this embodiment, and FIG. 1 is a flow chart 1 of a method for function indication according to an embodiment of the present invention. As shown in FIG. 1 , the flow includes the following steps:

Step S102, sending an instruction carried in a channel or signal to the UE, wherein the channel or signal is a channel or signal that needs to be received before receiving PDSCH or PDCCH data when the UE initially accesses the network, and the instruction is used to indicate whether the network is A preset function is supported, and the PDSCH data includes: PDSCH data carrying system parameters broadcast by the UE, and PDSCH data carrying unicast services.

Unless otherwise specified, the instructions are equivalent to signaling.

Through the above steps, whether the network supports the preset function is indicated through signaling, wherein the signaling is carried in a channel or signal that needs to be received before receiving PDSCH or PDCCH data when the UE initially accesses the network; wherein the PDSCH data includes : bears at least the PDSCH data of broadcast and the PDSCH data of unicast services, which solves the problem of unnecessary power consumption of MTC UEs with coverage enhancement, thereby avoiding excessive power consumption of MTC UEs.

In this embodiment, the preset function may include multiple functions, including: an MTC coverage enhancement function; in this case, the above-mentioned UE is a coverage enhancement MTC UE.

In this embodiment, the above-mentioned PDCCH includes but is not limited to: Enhanced Physical Downlink Control Channel (Enhanced Physical Downlink Control Channel, EPDCCH for short) data. The resource mapping of the PDCCH of the existing LTE system is performed within the full bandwidth, so the above-mentioned existing PDCCH will no longer be applicable to the coverage-enhanced MTC UE with only narrowband transmission capability; however, the EPDCCH of the existing LTE system supports In the form of narrowband transmission, that is, fewer physical resource blocks (Physical Resource Blocks, PRBs for short) can be occupied in the frequency domain.

In this embodiment, there may be multiple ways to send the command carried in the channel or signal to the UE, and may include at least one of the following: the channel or signal includes: a primary synchronization signal (Primary Synchronization Signal, PSS for short) and a physical A broadcast channel (Physical Broadcast Channel, PBCH for short) and a new physical channel (also referred to as a preset-defined physical channel) dedicated to transmitting the above signaling. Wherein, the PSS and the predefined physical channel are signals and channels dedicated to covering enhanced MTC UEs; the PBCH is a PBCH channel dedicated to covering enhanced MTC UEs or dedicated to covering enhanced MTC UEs and regular MTC UEs, or , which is the existing PBCH in the current LTE system. The advantages of using a new physical channel dedicated to the transmission of the above signaling are: because it carries the least content (only 1-bit payload), it has stronger coverage, and it requires less decoding delay and power compared to using PBCH. lower consumption.

In this embodiment, when the command is carried in the primary synchronization signal PSS, it includes: the above-mentioned PSS sequence is 6 and is different from the PSS sequence of the existing LTE system, and the above-mentioned PSS and the PSS time-frequency position of the existing LTE system The specific time-frequency resources are: in the time domain, the last orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) symbol of the first time slot of subframes 0 and 5 is located in the system in the frequency domain. 1.4MHz bandwidth or 6 PRB physical resources in the center of the bandwidth. In addition, the above-mentioned six PSS sequences are in one-to-one correspondence with three different intra-cell group identifiers and six different combinations of the above-mentioned commands. For example, the specific corresponding relationship can be shown in the following table:

Table 1

sequence combination

1st PSS sequence Identification within the first cell group, support for MTC coverage enhancement 2nd PSS sequence The first cell group identity, does not support MTC coverage enhancement 3rd PSS sequence The second cell group identification, support MTC coverage enhancement 4th PSS sequence The second cell group ID does not support MTC coverage enhancement 5th PSS sequence The third cell group identification, support MTC coverage enhancement 6th PSS sequence The 3rd cell group identity, does not support MTC coverage enhancement

Since the PSS dedicated to the coverage-enhanced MTC UE is in the same time-frequency position as the PSS of the existing LTE system (also referred to as the existing LTE), this method can not change the existing downlink synchronization behavior of the UE, including OFDM symbols, time slots , subframe and field level timing, etc. In order to ensure backward compatibility, the base station or network (eNB) can send two sets of PSS at the same time-frequency resource location mentioned above at the same time. Synchronization with coverage-enhancing MTC UEs.

In this embodiment, when the command is carried on the physical broadcast channel PBCH, it includes:

The above PBCH is transmitted on fixed OFDM symbols of predefined subframes. Wherein, the predefined subframes used for the PBCH transmission include: at least one of subframe 0, subframe 4, subframe 5 and subframe 9; and, fixed OFDM symbols used for the PBCH transmission, wherein for the subframe 0 and subframe 5, when the PBCH is a PBCH that uses the existing LTE system (also referred to as existing LTE), the fixed OFDM symbol is the OFDM symbol other than the OFDM symbol occupied by the downlink control region and the synchronization signal. All or part; otherwise, the fixed OFDM symbol is all or part of other OFDM symbols except the OFDM symbols occupied by the existing LTE PBCH, downlink control region and synchronization signal; for subframe 4 and subframe 9, the fixed OFDM symbol is all or part of other OFDM symbols except the OFDM symbols occupied by the downlink control region. In addition, when the PBCH is an existing LTE PBCH, in order to reuse the existing LTE PBCH resources allocated by the existing LTE system, that is, the first 4 OFDM symbols of the second time slot of subframe 0 to save overhead, the described The predefined subframe includes at least subframe 0 and the fixed OFDM symbols of the subframe 0 include at least the above-mentioned 4 OFDM symbols; when the PBCH is dedicated to covering enhanced MTC UEs or dedicated to covering enhanced MTC UEs and regular MTC UEs (also In the case of a PBCH that can be called non-existing LTE), the above method can ensure that the fixed OFDM symbols of the above-mentioned predefined subframes used for the above-mentioned PBCH transmission do not overlap with the resources or fixed OFDM symbols used for the above-mentioned existing LTE PBCH transmission.

For example, as shown in FIG. 2, it is assumed that the PBCH is a non-existing LTE PBCH and the predefined subframes for transmitting the PBCH include subframe 0, subframe 4, subframe 5 and subframe 9; Taking subframe 0 as an example, the first three OFDM symbols in subframe 0 are the downlink control region of the existing LTE system for resource mapping within the entire system bandwidth, and the first time slot (time slot 0) in subframe 0 The last 2 OFDM symbols are the existing LTE primary and secondary synchronization signals PSS/SSS, and the first 4 OFDM symbols of the second time slot (time slot 1) in subframe 0 are the existing LTE PBCH. In order to avoid different physical channels or severe interference between signals, so the above 9 OFDM symbols in subframe 0 cannot be used to transmit the PBCH; similarly, in other predefined subframes (including subframe 4, subframe 5 and subframe 9) OFDM symbols that are fixedly occupied by existing LTE physical channels or signals may also not be used to transmit the PBCH.

Furthermore, the fixed OFDM symbols in different predefined subframes in which the PBCH is transmitted may be the same or different.

If the above-mentioned PBCH is an existing LTE PBCH, the reserved bits in the existing MIB field carried in the existing LTE PBCH may be used. The content of the above-mentioned existing MIB field includes a system frame number (8 bits), a downlink bandwidth indication (3 bits), a physical HARQ Indication Channel (Physical HARQ Indication Channel, PHICH for short) configuration (3 bits) and a reserved field (10 bits); The above-mentioned HARQ is an abbreviation of Hybrid Automatic Repeated Request (Hybrid Automatic Repeated Request). One bit in the above-mentioned reserved field with a size of 10 bits may be used as the instruction to indicate to all coverage enhancement MTC UEs whether the current network supports the MTC coverage enhancement function.

In this embodiment, when the instruction is carried on a preset defined physical channel,

The pre-defined physical channel is transmitted on fixed OFDM symbols of pre-defined subframes; wherein, the pre-defined subframes used for pre-defined physical channel transmission include: subframe 0, subframe 4, subframe 5 and subframe at least one of 9.

The fixed OFDM symbols of the above-mentioned predefined subframes are the same (overlapped) as the resources (OFDM symbols) used for the existing LTE PBCH transmission, that is, the first four OFDM symbols of the second time slot (time slot 1) in subframe 0 symbol; at this time, the predefined subframe is subframe 0 and the fixed OFDM symbol is the first 4 OFDM symbols of the second time slot; this method can save the physical channel overhead as much as possible, but due to the difference between different channels Interference between them, a larger acquisition or decoding delay may be caused, which is not conducive to energy saving;

Or, the fixed OFDM symbols of the above-mentioned predefined subframes do not overlap with the resources of the existing LTE PBCH transmission; at this time, the fixed OFDM symbols used for the transmission of the predefined physical channel, wherein, for subframes 0 and 5, the fixed OFDM symbols OFDM symbols are all or part of other OFDM symbols except OFDM symbols occupied by existing LTE PBCH, downlink control region and synchronization signal; for subframes 4 and 9, the fixed OFDM symbols are OFDM symbols other than those occupied by downlink control region All or part of other OFDM symbols other than symbols; although this method can ensure the transmission performance of the pre-defined physical channel, it leads to more physical channel overhead, especially the overhead located in the center of the system bandwidth.

Wherein, the above-mentioned pre-defined physical channel structure may be based on a sequence/orthogonal code spreading method in the time-frequency domain, or based on a conventional channel coding and modulation method; when the above-mentioned sequence/orthogonal code spreading method is applied, Considering its structure similar to the synchronization signal, the above-mentioned preset definition physical channel can also assist in downlink synchronization.

Considering that the coverage-enhanced MTC UE does not know the system bandwidth when receiving the PBCH or the preset-defined physical channel, the frequency position of the PBCH or the preset-defined physical channel must always be located in the 6 physical resources in the center of the system bandwidth block within the PRB range. To improve coverage, the predefined subframe and/or the number of fixed OFDM symbols of the predefined subframe used for the PBCH or pre-defined physical channel transmission may be relatively large.

In the above embodiment, if the MTC coverage enhancement function is not supported by the network, all the system parameters broadcast by the eNB no longer include system parameters dedicated to the coverage enhancement MTC UE. At this time, the network will only consider the regular MTC UE type, and no longer consider the coverage enhanced MTC UE type. To save control overhead, the predefined subframes for broadcasting any one of the system parameters do not need to be too many, or the size of the corresponding scheduling time window does not need to be set too large. Wherein, the scheduling time window occurs periodically based on the scheduling period of the system parameter and includes at least one subframe.

In the above-mentioned embodiment, considering the Layer 2/Layer 3 (L2/L3) functions required by the conventional MTC UE and the coverage-enhanced MTC UE, for example, the degree of mobility support, and the different transmission modes of specific physical channels, For example, for a coverage-enhanced MTC UE, the repetition transmission mechanism and corresponding repetition level of a specific physical channel will be introduced, so the system configuration parameters of the above-mentioned two types of MTC UEs may not be exactly the same.

In the case where the network supports the MTC coverage enhancement function, the coverage enhancement MTC UE system parameters and the conventional MTC UE system parameters can be transmitted in the same narrowband, wherein the narrowband is a predefined narrowband, or is carried in the PBCH through the main The narrowband indicated by the information block MIB signaling; the PBCH is a PBCH channel dedicated to covering enhanced MTC UEs or dedicated to covering enhanced MTC UEs and regular MTC UEs; There may be multiple available narrowbands. In this case, one of the multiple narrowbands may be predefined, or the MIB signaling may indicate that one of the multiple narrowbands is used to transmit the above two types of MTC UEs. Type of system parameter. In addition, the total number of system information block SIBs sent by the network or eNB on the narrowband is N, wherein any one of the N SIBs includes system parameters covering enhanced MTC UEs and/or system parameters of conventional MTC UEs; the N is a positive integer greater than or equal to 1.

The first SIB among the N SIBs is transmitted in a predefined subframe, and other SIBs except the first SIB are transmitted according to their respective fixed scheduling periods and scheduling time window sizes, or according to the fields in the first SIB. The indicated respective scheduling period and scheduling time window size transmission; wherein, the predefined subframes include but are not limited to: at least one of subframe 0, subframe 4, subframe 5 and subframe 9 in an even-numbered radio frame, an odd-numbered radio frame At least one of subframe 0, subframe 4, subframe 5, and subframe 9 in a radio frame, and at least one of subframe 0, subframe 4, subframe 5, and subframe 9 in all radio frames.

When the N is equal to 1, the unique SIB includes all system parameters of the coverage enhanced MTC UE and all system parameters of the conventional MTC UE; at this time, the system parameters of the conventional MTC UE and the coverage enhanced MTC UE are uniformly designed, that is, whether it is Which UE type, the set of system parameters they receive is always the same, except that the system parameters dedicated to coverage enhanced MTC UEs are not valid for regular MTC UEs, and similarly the system parameters dedicated to regular MTC UEs are for It is also ineffective for coverage enhancement MTC UEs.

When the N is greater than 1, the first SIB in the N SIBs includes the system parameters shared by the coverage-enhanced MTC UE and the regular MTC UE, or the system parameters shared by the coverage-enhanced MTC UE and the regular MTC UE and the system parameters shared by the coverage-enhanced MTC UE and the regular MTC UE Necessary parameters for controlling transmission of other SIBs; any one of the N SIBs other than the first SIB includes system parameters dedicated to the coverage-enhanced MTC UE, or system parameters dedicated to regular MTC UEs ; Wherein, the necessary parameters for controlling other SIB transmissions include but are not limited to: scheduling period, scheduling time window size, transmission format and the specific content contained in the SIB; the transmission format includes but is not limited to TBS and the number of allocated PRBs.

In this case, the network will need to consider both regular and coverage enhanced MTC UE types. In order to ensure coverage, more predefined subframes for transmitting the first SIB in the above-mentioned N SIBs are required, and the size of the scheduling time window including other SIBs dedicated to covering the system parameters of the enhanced MTC UE needs to be set larger; To avoid unnecessary system control overhead, the size of the scheduling time window of other SIBs including system parameters dedicated to conventional MTC UEs does not need to be set too large.

In this embodiment, the above N is equal to 2. Wherein, the first SIB includes the system parameters shared by the regular MTC UE and the coverage-enhanced MTC UE, or the system parameters shared by the regular MTC UE and the coverage-enhanced MTC UE and the necessary parameters for controlling the transmission of the second SIB; and, the second SIB Contains system parameters specific to coverage-enhanced MTC UEs. At this time, the system parameters of the regular MTC UE and the coverage-enhanced MTC UE are designed independently, and it is assumed that the system parameters required by the regular MTC UE must be the system parameters required by the coverage-enhanced MTC UE, but the system parameters required by the coverage-enhanced MTC UE may not be applicable for conventional MTCUE. Specifically, all system parameters are divided into two categories, one is the system parameters shared by the regular MTC UE and the coverage-enhanced MTC UE and the necessary parameters for controlling the second SIB transmission, and the other is the system dedicated to the coverage-enhanced MTC UE parameter. Both conventional and coverage-enhanced MTC UEs need to receive the above-mentioned first SIB, but conventional MTC UEs do not need to receive the above-mentioned second SIB, and the necessary parameters for controlling the transmission of the second SIB are invalid for conventional MTC UEs. In addition to the SIB, the second SIB message should continue to be received.

In this embodiment, the above-mentioned N is equal to 3. Wherein, the first SIB includes the system parameters shared by the regular MTC UE and the coverage-enhanced MTC UE, or the system parameters shared by the regular MTC UE and the coverage-enhanced MTC UE and the necessary parameters for controlling the transmission of the second and third SIBs; and, The second and third SIBs or the third and second SIBs contain system parameters dedicated to coverage enhanced MTC UEs and regular MTC UEs, respectively. At this time, the system parameters of the conventional and coverage-enhanced MTC UEs are designed independently, and it is assumed that the system parameters required by the conventional MTC UE and the system parameters required by the coverage-enhanced MTC UE are partially overlapped; specifically, all system parameters are divided into three categories , the first category is the system parameters shared by the regular MTC UE and the coverage enhanced MTC UE and the necessary parameters for controlling the transmission of the second and third SIBs, and the second category is the system parameters dedicated to the coverage enhanced MTC UE (assuming the first Two SIBs), and the third category is system parameters dedicated to conventional MTC UEs (assumed to be the third SIB). Both the regular MTC UE and the coverage-enhanced MTC UE need to receive the first SIB; the regular MTC UE does not need to receive the second SIB, and the necessary parameters used to control the transmission of the second SIB are invalid for the regular MTC UE, but continue to receive the third SIB. SIB; Coverage-enhanced MTC UE should continue to receive the above-mentioned second SIB in addition to the first SIB, but does not need to receive the third SIB, and the necessary parameters for controlling the transmission of the third SIB are invalid for the coverage-enhancing MTC UE.

Regardless of whether it is a regular MTC UE or a coverage-enhanced MTC UE, they can try to combine and receive the first SIB data in adjacent predefined subframes, and other SIB data except the first SIB in different scheduling periods.

In this embodiment, when the command is carried on a non-existing LTE PBCH, the above-mentioned first SIB may include the system bandwidth information included in the MIB carried on the existing LTE PBCH in the existing LTE system, but considering the MTC UE The system bandwidth cannot be determined when the first SIB is received, so in this case at least the transmission narrowband of the first SIB can only be pre-defined as the narrowband at the center of the system bandwidth, or, by being carried on the non-existing LTE PBCH The new MIB field above at least indicates the determined frequency offset of the transmission narrowband of the first SIB.

In this embodiment, if the network supports the MTC coverage enhancement function, the paging messages of the coverage enhancement and regular MTC UEs are transmitted on different narrowbands, and the coverage enhancement MTC UE and the regular MTC UE have different paging control Channel PCCH (Paging Control Channel, PCCH for short) system configuration parameter; wherein, the different narrowbands are predefined or indicated by respective SIB signaling.

In this embodiment, the Paging message of the coverage-enhanced MTC UE is transmitted using group encoding or independent encoding, and based on EPDCCH scheduling or control-free operation; in the case of group encoding, in any Paging message, the All coverage-enhanced MTC UEs called use or have the same repetition level. The above-mentioned group coding means that any Paging message can include one or more paging records used for paging one or more UEs; the above-mentioned independent coding means that any Paging message always includes a paging record used for paging one UE. The only paging record.

In this embodiment, after obtaining the indication that the coverage-enhanced MTC UE is in the idle state, it is also necessary to obtain the historical Paging message repetition level of the UE;

If the transmission mode based on uncontrolled operation is used, obtain the historical Paging message repetition level from the Mobile Management Entity (Mobile Management Entity, MME for short), and start from the above historical Paging message repetition level, and use it sequentially above the above historical Paging message repetition level All Paging message repetition levels, try to transmit Paging messages until the uplink data from the coverage enhanced MTC UE is received;

If the transmission method based on EPDCCH scheduling is used, the historical Paging message repetition level is obtained from the MME, and starting from the above historical Paging message repetition level, all Paging message repetition levels above the above historical Paging message repetition level are used in turn, and the transmission schedule is attempted The EPDCCH of the Paging message and the corresponding Paging message until the uplink data from the coverage-enhanced MTC UE is received;

Wherein, under the determined repetition level of the Paging message, the specific repetition transmission times required by the Paging message itself is related to the transmission block size TBS of the Paging message; wherein, the above TBS depends on the simultaneous paging of the coverage-enhanced MTC UE using the same repetition level Specifically, for independent coding, the above-mentioned number of simultaneously paging UEs is always one, so the above-mentioned TBS is always a fixed value; for group coding, the above-mentioned number of simultaneously paging UEs may be greater than or equal to 1. The number of different UEs, Therefore, the above-mentioned TBS is a non-fixed value.

In this embodiment, if the MTC coverage enhancement function is supported by the network, the system parameters of the coverage enhancement MTC UE and the system parameters of the conventional MTC UE can also be transmitted in different narrowbands; at this time, it is equivalent to the conventional MTC UE and the coverage enhancement. MTC UEs use different narrowband systems without any interference with each other.

In this embodiment, the MIB signaling carried in the PBCH indicates, or the above-mentioned coverage-enhanced MTC UE narrowband is pre-defined; or, the above-mentioned coverage-enhanced MTC UE narrowband is implicitly determined through the conventional MTC UE narrowband; the PBCH is dedicated to Coverage enhanced MTC UE or PBCH channel dedicated to coverage enhanced MTC UE and regular MTC UE. For example, given the known conventional MTC UE narrowband, the coverage-enhanced MTC UE narrowband can be determined according to the following equation:

q ₂ =(q ₁ +k)modQ,

where q ₁ represents the narrowband index identifying the narrowband location of the regular MTC UE, _q2 represents the narrowband index identifying the narrowband location of the coverage enhanced MTC UE, Q represents the total number of available narrowbands, and k represents a fixed offset or depends on the system bandwidth or total The available narrowband number of Q biases.

In the above embodiment, the system parameter dedicated to the coverage enhancement MTC UE includes at least one of the following:

A parameter indicating the time-frequency position of a Physical Random Access Channel (PRACH) for repeated transmission, a parameter indicating a preset defined PRACH format, a parameter indicating an available subframe of the Paging message, and a physical channel The repeat transmission resource or repeat transmission level/number parameter.

This embodiment also provides a function indication method, which is applied on the terminal side. FIG. 3 is a second flowchart of a function indication method according to an embodiment of the present invention. As shown in FIG. 3 , the flow includes the following step:

Step S202, the UE receives an instruction carried in a channel or signal, where the channel or signal is a channel or signal that needs to be received before receiving PDSCH or PDCCH data when the UE initially accesses the network, and the instruction is used to indicate whether the network supports By default, the PDSCH data includes: PDSCH data bearing the broadcast system parameters of the UE and PDSCH data bearing the unicast service.

Through the above steps, whether the network supports the preset function is indicated through signaling, wherein the signaling is carried in a channel or signal that needs to be received before receiving PDSCH or PDCCH data when the UE initially accesses the network; wherein the PDSCH data includes : bears at least the PDSCH data of broadcast and the PDSCH data of unicast services, which solves the problem of unnecessary power consumption of MTC UEs with coverage enhancement, thereby avoiding excessive power consumption of MTC UEs.

In this embodiment, the preset function includes an MTC coverage enhancement function; at this time, the UE is a coverage enhancement MTC UE.

In this embodiment, the above-mentioned PDCCH includes but is not limited to EPDCCH data.

In this embodiment, there may be multiple ways to receive an instruction carried in a channel or signal, which may include at least one of the following: the above-mentioned channel or signal includes: a primary synchronization signal PSS and a physical broadcast channel PBCH, and a channel dedicated to transmitting the above-mentioned signaling. The new physical channel (also referred to as a pre-defined physical channel). Wherein, the PSS and the predefined physical channel are signals and channels dedicated to covering enhanced MTC UEs; the PBCH is a PBCH channel dedicated to covering enhanced MTC UEs or dedicated to covering enhanced MTC UEs and regular MTC UEs, or , which is the existing PBCH in the current LTE system. The advantages of using a new physical channel dedicated to the transmission of the above signaling are: because it carries the least content (only 1-bit payload), it has stronger coverage, and it requires less decoding delay and power compared to using PBCH. lower consumption.

In this embodiment, when the command is carried in the PSS, it includes: the above-mentioned PSS sequences are 6 and are different from the PSS sequences of the existing LTE system, and the above-mentioned PSS and the PSS of the existing LTE system have the same time-frequency position ; wherein, the above-mentioned 6 PSS sequences are in one-to-one correspondence with 6 different combinations of the identities in three different cell groups and the above-mentioned commands.

In this embodiment, when the command is carried on the PBCH, it includes:

The above-mentioned PBCH is received on a fixed OFDM symbol of a predefined subframe;

If the above-mentioned PBCH is an existing LTE PBCH, the reserved bits in the existing MIB field carried in the above-mentioned existing LTE PBCH can be used. If the above-mentioned PBCH is not an existing LTE PBCH, the fixed OFDM symbols of the above-mentioned predefined subframes used for the above-mentioned PBCH reception do not overlap with the resources used for the existing LTE PBCH reception.

In this embodiment, when the instruction is carried on a preset-defined physical channel, the preset-defined physical channel is received on a fixed OFDM symbol of a predefined subframe; wherein, the fixed OFDM symbol of the predefined subframe It can be the same (overlapping) with the resources (OFDM symbols) of the existing LTE PBCH. This method can save the physical channel overhead as much as possible, but due to the interference between different channels, more presets define the repetition of physical channels and more A large acquisition or decoding delay may be caused, which is not conducive to energy saving; or, the fixed OFDM symbols of the predefined subframe do not overlap with the resources for receiving the existing LTE PBCH, although this method can ensure the transmission of the predefined physical channel. performance, but incurs more physical channel overhead, especially at the center of the system bandwidth. Wherein, the above-mentioned pre-defined physical channel structure may be based on a sequence/orthogonal code spreading method in the time-frequency domain, or based on a conventional channel coding and modulation method; when the above-mentioned sequence/orthogonal code spreading method is applied, Considering its structure similar to the synchronization signal, the above-mentioned preset definition physical channel can also assist in downlink synchronization.

In this embodiment, the subframes used for receiving the PBCH or the predefined physical channel include:

at least one of subframe 0, subframe 4, subframe 5, and subframe 9; and,

A fixed OFDM symbol used for the PBCH reception, wherein, for subframe 0 and subframe 5, when the PBCH is an existing LTE PBCH, the fixed OFDM symbol is an OFDM symbol other than the OFDM symbol occupied by the downlink control region and the synchronization signal All or part of the symbol; otherwise, the fixed OFDM symbol is all or part of the other OFDM symbols except the OFDM symbols occupied by the existing LTE PBCH, downlink control region and synchronization signal; for subframe 4 and subframe 9, the fixed OFDM symbol The OFDM symbol is all or part of other OFDM symbols except the OFDM symbols occupied by the downlink control region;

The fixed OFDM symbol used for receiving the preset defined physical channel, when the fixed OFDM symbol does not overlap with the resources transmitted by the existing LTE PBCH, wherein, for subframe 0 and subframe 5, the fixed OFDM symbol is divided by the existing All or part of the other OFDM symbols other than the OFDM symbols occupied by the LTEPBCH, the downlink control region and the synchronization signal; for subframe 4 and subframe 9, the fixed OFDM symbol is the OFDM symbol other than the OFDM symbols occupied by the downlink control region. in whole or in part.

In this embodiment, when a preset defined physical channel is used, the sequence in which the enhanced coverage MTC UE initially accesses the network to receive signals or channels includes:

First receive the synchronization signal, and then receive the predefined physical channel and other physical channels;

Wherein, the synchronization signal includes:

Primary synchronization signal PSS and secondary synchronization signal (Secondary Synchronization Signal, SSS for short);

Wherein, the other physical channels include: EPDCCH, PBCH, PDSCH and so on.

In this embodiment, when the coverage enhancement MTC UE determines according to the instruction that the MTC coverage enhancement function is not supported by the network, the coverage enhancement MTC UE gives up access to the network.

In this embodiment, when the network supports the MTC coverage enhancement function, the system parameters of the coverage enhancement MTC UE are received in the narrowband shared with the conventional MTC UE; The narrowband acquired by MIB signaling in the PBCH is a PBCH dedicated to coverage-enhanced MTC UEs or dedicated to coverage-enhanced and regular MTC UEs. The total number of SIBs transmitted by the network in the narrowband is N, wherein any one of the N SIBs includes system parameters of the coverage enhanced MTC UE and/or system parameters of the regular MTC UE; N is a positive integer greater than or equal to 1.

Among the N SIBs, there are M SIBs including system parameters covering the enhanced MTC UE, where M is a positive integer greater than or equal to 1 and less than or equal to N, preferably equal to 1 or 2; the first SIB of the M SIBs is in Receiving on a predefined subframe, other SIBs except the first SIB are received according to their respective fixed scheduling periods and scheduling time window sizes, or according to their respective scheduling periods and scheduling times obtained from fields in the first SIB The predefined subframe includes but is not limited to: at least one of subframe 0, subframe 4, subframe 5 and subframe 9 in even-numbered radio frames, subframe 0, subframe 0, subframe 9 in odd-numbered radio frames At least one of frame 4, subframe 5, and subframe 9, and at least one of subframe 0, subframe 4, subframe 5, and subframe 9 in all radio frames.

In this embodiment, when the network supports the MTC coverage enhancement function, the Paging message is received on the determined narrowband according to the PCCH system configuration parameters; wherein the determined narrowband is predefined or obtained according to SIB signaling Narrowband; and, the determined narrowband and the PCCH system configuration parameters are different from the narrowband and PCCH system configuration parameters used by conventional MTC UE Paging messages.

In the case that the network supports the MTC coverage enhancement function, the Paging message is transmitted using group encoding or independent encoding, and based on EPDCCH scheduling or no control operation; in the case of group encoding, in any Paging message, at the same time All the coverage-enhancing MTC UEs that are paged use or have the same repetition level.

In this embodiment, when the coverage enhancement MTC UE is in the idle Idle state,

If the transmission mode based on EPDCCH scheduling is used, the EPDCCH for scheduling the Paging message is blindly detected according to the repetition level of the historical Paging message, and then the Paging message is received according to the EPDCCH for scheduling the Paging message; wherein the EPDCCH for scheduling the Paging message The repetition level is always the same as the Paging message repetition level. Specifically, first, the coverage-enhanced MTC UE attempts to decode the EPDCCH of the scheduled Paging message based on the historical Paging message repetition level up to the maximum Paging message repetition level in turn, until it is decoded correctly; The size of the DCI) is a fixed value, so it is not necessary to blindly detect the DCI size of the EPDCCH channel based on determining the repetition level of the Paging message to attempt to decode the EPDCCH that schedules the Paging message; then, decode the Paging message according to the acquired DCI information; wherein, the DCI Contains the transmission format of the Paging message (including the Paging message TBS, etc.).

If the uncontrolled operation and independent coding transmission mode are used, the Paging message is received in a blind detection manner according to the historical Paging message repetition level; specifically, the coverage enhancement MTC UE sequentially attempts to decode Paging based on the historical Paging message repetition level up to the maximum Paging message repetition level message until correctly decoded; wherein, since the TBS for independently encoded Paging messages is a fixed value, attempting to decode Paging messages based on determining the Paging message repetition level also does not require blind detection of the Paging message TBS size.

If the uncontrolled operation based and block-coded transmission mode is used, the Paging message is received in a blind detection manner according to the historical Paging message repetition level and the TBS set of potential Paging messages; specifically, the coverage enhancement MTC UE is in turn based on the historical Paging message repetition level Attempting to decode the Paging message up to the maximum Paging message repetition level until it is correctly decoded; wherein, the attempt to decode the Paging message based on the determined Paging message repetition level includes: based on possible different Paging message TBSs, and the TBS in the above determined Paging message The specific number of repeated transmissions under the message repetition level to attempt to decode the Paging message. For example, it is assumed that there are 3 repetition levels of Paging messages, and the possible TBSs of Paging messages include 4 types. The repetition level is the second repetition level, then the coverage-enhanced MTC UE can try to decode the Paging message based on the second repetition level and the third repetition level in sequence until it is decoded correctly; wherein, trying to decode the Paging message based on the second repetition level refers to the Attempting to decode the Paging message based on the above-mentioned four different Paging message TBSs and the specific repeated transmission times of the TBS at the second repetition level, and attempting to decode the Paging message based on the third Paging message repetition level refers to the above four different Paging message TBSs respectively. and the specific repeated transmission times of the TBS at the third repetition level to attempt to decode the Paging message.

Table 2

In this embodiment, when the network supports the MTC coverage enhancement function, all system parameters of the coverage enhancement MTC UE are received in a narrowband different from the conventional MTC UE; wherein the narrowband is a predefined narrowband or is carried in the PBCH according to the The narrowband obtained by MIB signaling, or the narrowband implicitly determined according to the narrowband of the conventional MTC UE; the PBCH is a PBCH channel dedicated to covering the enhanced MTC UE or dedicated to covering the enhanced MTC UE and the conventional MTC UE.

In this embodiment, the instruction carried in the channel or signal that needs to be received before receiving PDSCH or PDCCH data when the coverage-enhanced MTC UE initially accesses the network is used to indicate whether the network supports the MTC coverage enhancement function, so that the coverage-enhanced MTC UE can fully It is possible to quickly obtain the support capability of the current network for it, and solve the problem of unnecessary power consumption of the MTC UE with coverage enhancement, thereby avoiding excessive power consumption of the MTC UE.

FIG. 4 is a structural block diagram 1 of an apparatus for function indication according to an embodiment of the present invention, which is used for machine type communication MTC, as shown in FIG. 4 , located in the base station side, and the apparatus includes:

The sending module 32 is configured to send an instruction carried in a channel or signal to the UE, wherein the channel or signal is a channel or signal that needs to be received before receiving PDSCH or PDCCH data when the UE initially accesses the network, and the instruction is used for Indicates whether the network supports a preset function, and the PDSCH data includes: PDSCH data carrying system parameters broadcast by the UE, and PDSCH data carrying unicast services.

Through the above device, an instruction is used to indicate whether the network supports a preset function, wherein the instruction is carried in a channel or signal that needs to be received before receiving PDSCH or PDCCH data when the UE initially accesses the network; wherein, the PDSCH data includes: At least the broadcast PDSCH data and the PDSCH data carrying unicast services solve the problem of unnecessary power consumption of the MTC UE with coverage enhancement, thereby avoiding excessive power consumption of the MTC UE. In the above device, the preset function includes: an MTC coverage enhancement function, and the UE is a coverage enhancement MTC UE.

FIG. 5 is a second structural block diagram of an apparatus for function indication according to an embodiment of the present invention, which is used for machine type communication (MTC), as shown in FIG. 5 , located on the terminal side, and the apparatus includes:

The receiving module 42 is used for the UE to receive an instruction carried in a channel or signal, where the channel or signal is a channel or signal that the UE needs to receive before receiving PDSCH or PDCCH data when the UE initially accesses the network, and the instruction is used for Indicates whether the network supports a preset function, and the PDSCH data includes: PDSCH data carrying system parameters broadcast by the UE and PDSCH data carrying unicast services.

Through the above device, an instruction is used to indicate whether the network supports a preset function, wherein the instruction is carried in a channel or signal that needs to be received before receiving PDSCH or PDCCH data when the UE initially accesses the network; wherein, the PDSCH data includes: At least the broadcast PDSCH data and the PDSCH data carrying unicast services solve the problem of unnecessary power consumption of the MTC UE with coverage enhancement, thereby avoiding excessive power consumption of the MTC UE. In the above apparatus, the preset function includes: an MTC coverage enhancement function, and the UE is a coverage enhancement MTC UE.

In this embodiment, a function indication system is also provided, which is characterized in that, used for machine type communication MTC, including:

The base station side includes the device on the base station side, where the device implements the method in the above embodiment;

The terminal side includes the foregoing apparatus on the terminal side, where the apparatus implements the method in the foregoing embodiment.

Obviously, those skilled in the art should understand that the above-mentioned modules or steps of the present invention can be implemented by a general-purpose computing device, which can be centralized on a single computing device, or distributed in a network composed of multiple computing devices Alternatively, they may be implemented in program code executable by a computing device, such that they may be stored in a storage device and executed by the computing device, and in some cases, in a different order than here The steps shown or described are performed either by fabricating them separately into individual integrated circuit modules, or by fabricating multiple modules or steps of them into a single integrated circuit module. As such, the present invention is not limited to any particular combination of hardware and software.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (29)

1. A method for function indication, MTC, comprising:

sending an instruction loaded in a channel or a signal to a coverage enhancement MTC terminal UE, wherein the channel or the signal is a channel or a signal which needs to be received before PDSCH or PDCCH data is received when the UE initially accesses a network, the instruction is used for indicating whether the network supports an MTC coverage enhancement function, and the PDSCH data comprises: PDSCH data for carrying broadcasted system parameters of the UE and PDSCH data for carrying unicast service;

in the case that the network supports the MTC coverage enhancement function, the system parameters of the coverage enhancement MTC UE and the system parameters of the conventional MTCU are transmitted on the same narrow band, wherein the narrow band is a predefined narrow band or a narrow band indicated by Master Information Block (MIB) signaling carried in PBCH;

the total number of System Information Blocks (SIBs) sent by a network on the narrow band is N, wherein any one of the N SIBs contains system parameters covering enhanced MTC UE and/or system parameters of conventional MTC UE;

n is a positive integer greater than or equal to 1;

a first SIB in the N SIBs is transmitted on a predefined subframe, and other SIBs except the first SIB are transmitted according to a respective fixed scheduling period and a scheduling time window size, or are transmitted according to a respective scheduling period and a scheduling time window size indicated by a field in the first SIB;

wherein the predefined subframes include, but are not limited to: at least one of subframe 0, subframe 4, subframe 5, and subframe 9 in an even radio frame, at least one of subframe 0, subframe 4, subframe 5, and subframe 9 in an odd radio frame, and at least one of subframe 0, subframe 4, subframe 5, and subframe 9 in all radio frames.

2. The method of claim 1, wherein sending the instructions carried in a channel or signal to the UE comprises at least one of:

sending an instruction loaded on a Primary Synchronization Signal (PSS) to the terminal;

sending a command carried on a physical broadcast channel PBCH to the terminal;

and sending an instruction loaded in a preset defined physical channel to the terminal.

3. The method of claim 2, wherein the instructions, carried in the primary synchronization signal PSS, comprise:

the PSS has 6 sequences, wherein the 6PSS sequences correspond to 6 different combinations of the instructions and the identifiers in three different cell groups one by one.

4. The method of claim 2, wherein the instructions, when carried on the physical broadcast channel PBCH, comprise:

the PBCH is transmitted on a fixed Orthogonal Frequency Division Multiplexing (OFDM) symbol of a predefined subframe;

in the case that the PBCH is not an existing LTE PBCH, the fixed OFDM symbols of the predefined subframe do not overlap with resources of existing LTEPBCH transmissions.

5. The method of claim 2, wherein the instructions carried in the predefined physical channels comprise:

the preset defined physical channel is transmitted on a fixed OFDM symbol of a predefined subframe;

wherein the fixed OFDM symbol of the predefined subframe is the same as the resource of the existing LTE PBCH transmission, or the fixed OFDM symbol of the predefined subframe is not overlapped with the resource of the existing LTE PBCH transmission.

6. The method of claim 4 or 5, wherein the subframe for the PBCH or the pre-defined physical channel transmission comprises:

at least one of subframe 0, subframe 4, subframe 5, and subframe 9; and the number of the first and second groups,

a fixed OFDM symbol for the PBCH transmission, wherein for subframes 0 and 5, when the PBCH is an existing LTE PBCH, the fixed OFDM symbol is all or part of other OFDM symbols except the OFDM symbols occupied by the downlink control region and the synchronization signal; otherwise, the fixed OFDM symbol is all or part of other OFDM symbols except the OFDM symbols occupied by the existing LTEPBCH, the downlink control area and the synchronous signals; for sub-frames 4 and 9, the fixed OFDM symbol is all or part of other OFDM symbols except for OFDM symbols occupied by the downlink control region;

a fixed OFDM symbol for the preset defined physical channel transmission, when the fixed OFDM symbol does not overlap with the resources of the existing LTEPBCH transmission, wherein, for sub-frames 0 and 5, the fixed OFDM symbol is all or part of other OFDM symbols except the OFDM symbols occupied by the existing LTEPBCH, the downlink control region and the synchronization signal; for subframes 4 and 9, the fixed OFDM symbol is all or part of other OFDM symbols except for OFDM symbols occupied by the downlink control region.

7. The method of claim 1, comprising:

when said N is equal to 1, then,

the unique SIB contains all system parameters of the coverage enhancement MTC UE and all system parameters of the conventional MTC UE;

when the N is greater than 1, the N,

a first SIB in the N SIBs contains system parameters shared by the coverage enhancement MTC UE and the conventional MTC UE, or the system parameters shared by the coverage enhancement MTC UE and the conventional MTC UE and necessary parameters for controlling other SIB transmissions; any one of the other SIBs of the N SIBs except the first SIB contains system parameters dedicated to the coverage enhanced MTC UE or system parameters dedicated to a regular MTC UE; the necessary parameters for controlling the transmission of other SIBs include, but are not limited to, scheduling period and scheduling time window size, and transmission format.

8. The method of claim 7, comprising:

in the case where said N is 2,

the first SIB comprises system parameters shared by the coverage enhancement MTC UE and the conventional MTC UE, or the system parameters shared by the coverage enhancement MTC UE and the conventional MTC UE and necessary parameters for controlling transmission of a second SIB; and the second SIB includes system parameters specific to the coverage enhanced MTC UE.

9. The method of claim 7, comprising:

in the case where said N is 3,

the first SIB contains system parameters shared by the coverage enhancement MTC UE and the conventional MTC UE, or the system parameters shared by the coverage enhancement MTC UE and the conventional MTC UE and necessary parameters for controlling the transmission of the second SIB and the third SIB; and the second and third SIBs or the third and second SIBs contain system parameters dedicated to the coverage enhanced MTC UE and the regular MTC UE, respectively.

10. The method of claim 1, comprising:

under the condition that the network supports the MTC coverage enhancement function, the Paging message of the coverage enhancement MTC UE and the Paging message of the conventional MTC UE are transmitted on different narrow bands, and the coverage enhancement MTC UE and the conventional MTC UE have different Paging Control Channel (PCCH) system configuration parameters; wherein the different narrowband is predefined or indicated by SIB signaling.

11. The method of claim 1, comprising:

in the case where the network supports MTC coverage enhancement functions,

the Paging message uses block coding or independent coding, and is transmitted by means of enhanced downlink control channel EPDCCH scheduling or non-control operation;

in the case of group coding, all the coverage enhanced mtues that are Paging simultaneously use or have the same repetition level in any one of the Paging messages.

12. The method of claim 11, comprising:

acquiring an indication that the UE is in an Idle state and a historical Paging message repetition level;

when the UE is determined to be in an Idle Idle state, the Paging message is transmitted according to a mode of no control operation, and all Paging message repetition levels above the historical Paging message repetition level are used for trying to transmit the Paging message in sequence from the historical Paging message repetition level until uplink data from the UE are received;

when the UE is determined to be in the Idle state, the Paging message attempts to transmit the EPDCCH of the scheduling Paging message and the corresponding Paging message by using all the Paging message repetition levels above the historical Paging message repetition level in sequence from the historical Paging message repetition level according to the transmission mode of EPDCCH scheduling until uplink data from the UE is received.

13. The method of claim 1, comprising:

under the condition that the network supports an MTC coverage enhancement function, system parameters of the coverage enhancement MTC UE and system parameters of a conventional MTCE are transmitted in different narrow bands; wherein, the coverage enhancement MTC UE narrow band is indicated through MIB signaling carried in PBCH, or predefined; or implicitly determining the coverage enhancement MTC UE narrowband through a conventional MTC UE narrowband.

14. The method according to any one of claims 1 to 5 and 7 to 13, wherein the system parameters of the coverage enhanced MTC UE comprise at least one of:

the parameter indicating the time-frequency position of the physical random access channel PRACH for repeated transmission, the parameter indicating the preset defined PRACH format, the parameter indicating the available subframe of the Paging message, and the parameter indicating the repeated transmission resource or the repeated transmission level/times of the physical channel.

15. A method for function indication, MTC, comprising:

the coverage enhancement MTC UE receives an instruction carried in a channel or a signal, wherein the channel or the signal is a channel or a signal which needs to be received before PDSCH or PDCCH data is received when the UE initially accesses a network, the instruction is used for indicating whether the network supports an MTC coverage enhancement function, and the PDSCH data comprises: PDSCH data for carrying broadcasted system parameters of the UE and PDSCH data for carrying unicast service;

under the condition that the network supports the MTC coverage enhancement function, receiving system parameters of the coverage enhancement MTC UE in a narrow band shared by the conventional MTC UE; the narrowband is a predefined narrowband or a narrowband obtained according to a master information block MIB signaling carried in a PBCH;

the total number of System Information Blocks (SIBs) transmitted by a network on the narrow band is N, wherein any one of the N SIBs contains system parameters covering enhanced MTC UE and/or system parameters of regular MTC UE;

n is a positive integer greater than or equal to 1;

the number of SIBs including the coverage enhancement MTC UE system parameters is M,

wherein M is a positive integer greater than or equal to 1 and less than or equal to N;

receiving a first SIB of the M SIBs on a predefined subframe, and receiving other SIBs except the first SIB according to a respective fixed scheduling period and a scheduling time window size, or according to a respective scheduling period and a scheduling time window size obtained from a field in the first SIB;

wherein the predefined subframes include, but are not limited to: at least one of subframe 0, subframe 4, subframe 5, and subframe 9 in an even radio frame, at least one of subframe 0, subframe 4, subframe 5, and subframe 9 in an odd radio frame, and at least one of subframe 0, subframe 4, subframe 5, and subframe 9 in all radio frames.

16. The method of claim 15, wherein receiving the instruction carried in the channel or signal comprises at least one of:

receiving an instruction loaded on a primary synchronization signal PSS;

receiving an instruction loaded on a physical broadcast channel PBCH;

an instruction carried in a preset defined physical channel is received.

17. The method of claim 16, wherein the instructions, carried in the primary synchronization signal PSS, comprise:

the PSS has 6 sequences, wherein the 6PSS sequences correspond to 6 different combinations of the instructions and the identifiers in three different cell groups one by one.

18. The method of claim 16, wherein the instructions, when carried on the physical broadcast channel PBCH, comprise:

receiving the PBCH on a fixed Orthogonal Frequency Division Multiplexing (OFDM) symbol of a predefined subframe;

in case the PBCH is not an existing LTE PBCH, the fixed OFDM symbols of the predefined subframe do not overlap with resources receiving an existing LTE PBCH.

19. The method of claim 16, wherein the instructions, when carried in the predefined physical channels, comprise:

the preset defined physical channel is received on a fixed OFDM symbol of a predefined subframe; wherein the fixed OFDM symbol of the predefined subframe is the same as the resource for receiving the existing LTE PBCH, or the fixed OFDM symbol of the predefined subframe is not overlapped with the resource for receiving the existing LTE PBCH.

20. The method of claim 18 or 19, wherein the subframe for the PBCH or the preset defined physical channel reception comprises:

at least one of subframe 0, subframe 4, subframe 5, and subframe 9; and the number of the first and second groups,

a fixed OFDM symbol for the PBCH reception, wherein for subframes 0 and 5, when the PBCH is an existing LTE PBCH, the fixed OFDM symbol is all or part of other OFDM symbols except for OFDM symbols occupied by a downlink control region and a synchronization signal; otherwise, the fixed OFDM symbol is all or part of other OFDM symbols except the OFDM symbols occupied by the existing LTEPBCH, the downlink control area and the synchronous signals; for sub-frames 4 and 9, the fixed OFDM symbol is all or part of other OFDM symbols except for OFDM symbols occupied by the downlink control region;

a fixed OFDM symbol for the preset defined physical channel reception, when the fixed OFDM symbol does not overlap with the resources of the existing LTEPBCH transmission, wherein, for sub-frames 0 and 5, the fixed OFDM symbol is all or part of other OFDM symbols except the OFDM symbols occupied by the existing LTEPBCH, the downlink control region and the synchronization signal; for subframes 4 and 9, the fixed OFDM symbol is all or part of other OFDM symbols except for OFDM symbols occupied by the downlink control region.

21. The method according to claim 16, wherein when the predefined physical channels are used, the order in which the coverage enhancement MTC UEs initially access a network to receive signals or channels comprises:

firstly, receiving a synchronous signal, and then receiving a preset defined physical channel and other physical channels;

wherein the synchronization signals comprise a PSS and a secondary synchronization signal SSS;

wherein the other physical channels include: enhanced downlink control channels EPDCCH, PBCH and PDSCH.

22. The method of claim 15, comprising:

when the coverage enhancement MTC UE determines that the MTC coverage enhancement function is not supported by the network according to the instruction, the coverage enhancement MTC UE gives up accessing the network.

23. The method of claim 15, comprising:

under the condition that the network supports the MTC coverage enhancement function, receiving a Paging message on a determined narrow band according to the PCCH system configuration parameters; wherein the determined narrowband is predefined or acquired according to SIB signaling; the determined narrowband and PCCH system configuration parameters are different from the narrowband and PCCH system configuration parameters used by a conventional MTC UE Paging message.

24. The method of claim 15, comprising:

in the case where the network supports MTC coverage enhancement functions,

the Paging message is transmitted by using grouped coding or independent coding and enhanced downlink control channel EPDCCH scheduling or a mode without control operation;

in the case of group coding, all the coverage enhanced mtues that are Paging simultaneously use or have the same repetition level in any one of the Paging messages.

25. The method of claim 24, comprising:

when the coverage enhancement MTC UE is in an Idle Idle state,

if the transmission mode is used based on the EPDCCH scheduling, receiving the EPDCCH of the scheduling Paging message in a blind detection mode according to the repetition level of the historical Paging message, and then receiving the Paging message according to the EPDCCH for scheduling the Paging message;

if the non-control operation and independent coding transmission mode is used, receiving the Paging message in a blind detection mode according to the historical Paging message repetition level;

if a control-less operation and block coding based transmission scheme is used, the Paging message is received in a blind detection manner based on a historical Paging message repetition level and a TBS set of potential Paging messages.

26. The method of claim 15, comprising:

in the case where the network supports MTC coverage enhancement functions,

receiving system parameters of the coverage enhancement MTC UE in a narrow band different from a normal MTC UE; the narrow band is a predefined narrow band, or a narrow band obtained according to an MIB signaling carried in a PBCH, or a narrow band implicitly determined according to a normal MTC UE narrow band.

27. An apparatus for function indication, MTC, for machine type communication, comprising:

a sending module, configured to send an instruction carried in a channel or a signal to a coverage enhancement MTC UE, where the channel or the signal is a channel or a signal that needs to be received before receiving PDSCH or PDCCH data when the UE initially accesses a network, and the instruction is used to indicate whether the network supports an MTC coverage enhancement function, where the PDSCH data includes: PDSCH data for carrying broadcasted system parameters of the UE and PDSCH data for carrying unicast service;

under the condition that the network supports the MTC coverage enhancement function, system parameters of the coverage enhancement MTC UE and system parameters of the conventional MTC UE are transmitted on the same narrow band, wherein the narrow band is a predefined narrow band or a narrow band indicated by a Master Information Block (MIB) signaling carried in a PBCH (physical broadcast channel);

the total number of System Information Blocks (SIBs) sent by a network on the narrow band is N, wherein any one of the N SIBs contains system parameters covering enhanced MTC UE and/or system parameters of conventional MTC UE;

n is a positive integer greater than or equal to 1;

a first SIB in the N SIBs is transmitted on a predefined subframe, and other SIBs except the first SIB are transmitted according to a respective fixed scheduling period and a scheduling time window size, or are transmitted according to a respective scheduling period and a scheduling time window size indicated by a field in the first SIB;

wherein the predefined subframes include, but are not limited to: at least one of subframe 0, subframe 4, subframe 5, and subframe 9 in an even radio frame, at least one of subframe 0, subframe 4, subframe 5, and subframe 9 in an odd radio frame, and at least one of subframe 0, subframe 4, subframe 5, and subframe 9 in all radio frames.

28. An apparatus for function indication, MTC, for machine type communication, comprising:

a receiving module, configured to receive, by a coverage enhancement MTC UE, an instruction carried in a channel or a signal, where the channel or the signal is a channel or a signal that needs to be received before receiving PDSCH or PDCCH data when the UE initially accesses a network, where the instruction is used to indicate whether the network supports an MTC coverage enhancement function, and the PDSCH data includes: PDSCH data for carrying broadcasted system parameters of the UE and PDSCH data for carrying unicast service;

receiving system parameters of coverage enhancement MTC UE in a narrow band shared by conventional MTC UE under the condition that the network supports the MTC coverage enhancement function; the narrowband is a predefined narrowband or a narrowband obtained according to a master information block MIB signaling carried in a PBCH;

the total number of System Information Blocks (SIBs) transmitted by a network on the narrow band is N, wherein any one of the N SIBs contains system parameters covering enhanced MTC UE and/or system parameters of regular MTC UE;

n is a positive integer greater than or equal to 1;

the number of SIBs including the coverage enhancement MTC UE system parameters is M,

wherein M is a positive integer greater than or equal to 1 and less than or equal to N;

receiving a first SIB of the M SIBs on a predefined subframe, and receiving other SIBs except the first SIB according to a respective fixed scheduling period and a scheduling time window size, or according to a respective scheduling period and a scheduling time window size obtained from a field in the first SIB;

wherein the predefined subframes include, but are not limited to: at least one of subframe 0, subframe 4, subframe 5, and subframe 9 in an even radio frame, at least one of subframe 0, subframe 4, subframe 5, and subframe 9 in an odd radio frame, and at least one of subframe 0, subframe 4, subframe 5, and subframe 9 in all radio frames.

29. A system of function indication, for Machine Type Communication (MTC), comprising:

a base station side comprising the apparatus of claim 27;

a terminal side comprising the apparatus of claim 28.

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