CN112583528B

CN112583528B - Method and device for determining size of transmission block

Info

Publication number: CN112583528B
Application number: CN201910940790.4A
Authority: CN
Inventors: 花梦; 焦淑蓉
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2022-11-08
Anticipated expiration: 2039-09-30
Also published as: CN115765931A; CN112583528A

Abstract

Methods and apparatus for determining TBS are provided. The method comprises the following steps: determining N times of repeatedly transmitting uplink data channels, wherein the N times of repeatedly transmitting uplink data channels are the first N times of M times of repeatedly transmitting uplink data channels, M is larger than N, and N is a positive integer larger than 1; the transmission block TBS of the M times of repeated transmission uplink data channels is determined according to the symbol number of the previous N times of repeated transmission uplink data channels, so that the problem of too low code rate caused by determining the TBS by always adopting the symbol number of the repeated transmission of the symbol number of the M times of repeated transmission uplink data channels with the largest symbol number is avoided, and the problem of low spectrum efficiency caused by always adopting the symbol number of the repeated transmission of the M times of repeated transmission uplink data channels with the smallest symbol number to determine the TBS.

Description

Method and device for determining size of transmission block

Technical Field

The present application relates to the field of communications, and more particularly, to a method and apparatus for determining a transport block size in the field of communications.

Background

In the field of communications, in order to improve the reliability of transmission data, retransmission (retransmission) is performed, and a Transport Block Size (TBS) for each retransmission may be determined at the time of first transmission, and the TBS at the time of retransmission and the TBS at the time of first transmission may be matched.

In general, a terminal device determines the number of times of repeated transmission and the number of symbols (symbols) occupied by each repeated transmission of data according to a higher layer configuration or Downlink Control Information (DCI). However, due to some other factors, the actual number of times of repeated transmission and/or the number of symbols occupied by the actual data transmitted repeatedly each time are inconsistent with the number of times of repeated transmission and the number of symbols occupied by the data transmitted repeatedly each time determined by the terminal device according to the high-layer configuration or DCI. The TBS for each retransmission is identical to the TBS for the first transmission, and therefore it is important to determine an accurate TBS representation at the time of the first transmission. If the TBS determined during the first transmission is determined for one-time repeated transmission with the minimum number of symbols occupied in multiple repeated transmissions, the code rate of repeated transmission with more symbols occupied in the multiple repeated transmissions is reduced, so that the transmission efficiency is influenced; if the TBS determined during the first transmission is a TBS that is transmitted repeatedly for one time and occupies the largest number of symbols in multiple repeated transmissions, the code rate of the repeated transmission that occupies a small number of symbols in the multiple repeated transmissions is too high, which results in no way of decoding. Therefore, how to determine a relatively accurate TBS is an urgent problem to be solved.

Disclosure of Invention

The application provides a method and a device for determining TBS, which can ensure the transmission performance of the determined TBS and also can take the spectrum efficiency into account.

In a first aspect, a method for determining a TBS is provided, including: determining N times of repeatedly transmitted uplink data channels, wherein the N times of repeatedly transmitted uplink data channels are the first N times of M times of repeatedly transmitted uplink data channels, M is greater than N, and N is a positive integer greater than 1; and determining the transmission block TBS of the M times of repeated transmission uplink data channels according to the symbol number of the previous N times of repeated transmission uplink data channels.

Therefore, the TBS of the uplink data channel with M times of repeated transmission can be determined by using the number of symbols of the uplink data channel with N times of repeated transmission in the first time of the uplink data channel with M times of repeated transmission, thereby avoiding the problem of too low code rate caused by determining the TBS by always using the number of symbols of one repeated transmission with the largest number of symbols among the number of symbols of the uplink data channel with M times of repeated transmission, and also avoiding the problem of low spectrum efficiency caused by always using the number of symbols of one repeated transmission with the smallest number of symbols among the number of symbols of the uplink data channel with M times of repeated transmission to determine the TBS. Furthermore, when the number of symbols of the uplink data channel repeatedly transmitted for the previous N times is used to determine the transport block TBS of the uplink data channel repeatedly transmitted for the M times, it is beneficial to improve the success rate that the network device can decode the uplink data channel repeatedly transmitted for the previous N times, that is, when the remaining last uplink data channel of M-N times is not repeatedly transmitted, the network device can correctly decode to a certain extent, so as to reduce the time delay for receiving the uplink data channel.

Alternatively, the method may be performed by a terminal device or a network device.

For example, the uplink data channel is a Physical Uplink Shared Channel (PUSCH).

Alternatively, M may be equal to N. Alternatively, N may be equal to 1.

Alternatively, the number of symbols is a time domain symbol number, for example, the time domain symbol number may be an Orthogonal Frequency Division Multiplexing (OFDM) symbol (symbol) or a discrete fourier transform spread OFDM (DFT-s-OFDM) symbol.

Alternatively, M may be the actual number of repeated transmissions.

In a possible implementation manner, the determining, according to the number of symbols of the uplink data channel transmitted repeatedly for the first N times, the TBS of the uplink data channel transmitted repeatedly for the M times includes: and determining the TBS of the M repeated transmission uplink data channels according to the total symbol number of the previous N repeated transmission uplink data channels. The code rate of repeated transmission which occupies less symbols in repeated transmission for many times is not too high, the problem of low frequency efficiency is not caused, and the frequency spectrum efficiency is favorably improved.

In a possible implementation manner, the determining, according to the number of symbols of the uplink data channel transmitted repeatedly for the first N times, the TBS of the uplink data channel transmitted repeatedly for the M times includes: and determining the TBS of the uplink data channel repeatedly transmitted for M times according to the maximum symbol number in the symbol numbers of the uplink data channel repeatedly transmitted for the previous N times. The code rate of repeated transmission which occupies less symbols in repeated transmission for many times is not too high, the problem of low frequency efficiency is not caused, and the frequency spectrum efficiency is favorably improved. The code rate of the repeated transmission which occupies a large number of symbols in the repeated transmission is not too low, and the transmission efficiency is improved.

In a possible implementation manner, the determining the TBS of the uplink data channel with M times of repeated transmission according to the number of symbols of the uplink data channel with N times of repeated transmission includes: and determining the TBS of the uplink data channel repeatedly transmitted for M times according to the minimum symbol number in the symbol numbers of the uplink data channel repeatedly transmitted for the previous N times. The method can give consideration to the smaller repeated transmission with larger symbol number in repeated transmission for many times, and can give consideration to both transmission efficiency and spectrum efficiency.

In a possible implementation manner, the determining the TBS of the uplink data channel with M times of repeated transmission according to the number of symbols of the uplink data channel with N times of repeated transmission includes: and determining the TBS of the M times of repeated transmission uplink data channels according to the average symbol number of the previous N times of repeated transmission uplink data channels.

Alternatively, the TBS of the M repeated transmission uplink data channels may be determined according to the number of symbols rounded down or rounded up from the average number of symbols.

In some possible implementations, the determining the N times of repeatedly transmitting the uplink data channel includes: and determining the N times of repeated transmission uplink data channels according to a first mapping relation, wherein the first mapping relation is used for indicating the corresponding relation between the repeated transmission times M and the repeated transmission times N.

Optionally, if the method is executed by the terminal device, the method further includes: a first mapping relationship is received from a network device.

Optionally, the first mapping relationship may be preset or may be protocol-specified.

In some possible implementations, the determining the N times of repeatedly transmitting the uplink data channel includes: and the uplink data channel is repeatedly transmitted for N times according to a second mapping relation, wherein the second mapping relation is used for indicating the corresponding relation between the repeated transmission times L and the repeated transmission times N, and the repeated transmission times L is a positive integer and is obtained in the downlink control information DCI and/or the high-level configuration parameters.

In some possible implementations, M may be greater than L, or M may be equal to L, or M may be less than L.

Optionally, if the method is executed by the terminal device, the method further includes: a second mapping relationship is received from the network device.

Optionally, the second mapping relationship may be preset or may be protocol-specified.

In some possible implementations, the determining the N times of repeatedly transmitting the uplink data channel includes: and repeatedly transmitting the uplink data channel for the N times according to a third mapping relation, wherein the mapping relation is used for indicating the corresponding relation between the redundancy version and the repeated transmission times N.

Optionally, if the method is executed by the terminal device, the method further includes: a third mapping relationship is received from the network device.

Optionally, the third mapping relationship may be preset or may be protocol-specified.

Optionally, N may be determined according to the number of times of retransmission of the retransmission interval with the two redundancy versions being 0, for example, the redundancy version of the four-time retransmission is 0303, and the retransmission interval with the two redundancy versions being 0 is 2, then N is 2; for another example, if the redundancy version of the four-times-repeated transmission is 0312, N =4; if the redundancy version of the four repeated transmissions is 0000, then N =1. Specifically, a first redundancy version is obtained in the DCI and/or the higher layer configuration parameter, and after the first redundancy version is obtained, N is determined according to the third mapping relationship and the first redundancy version, and in combination with the foregoing example, if the first redundancy version is 0303, N is 2.

In some possible implementations, the method further includes: determining the number of symbols of each uplink data channel repeatedly transmitted in the uplink data channels repeatedly transmitted for the previous N times according to at least one of the following items:

a time unit format;

acquiring repeated transmission times L in downlink control information DCI and/or high-level configuration parameters;

and the number of symbols of each repeatedly transmitted uplink data channel in the L repeatedly transmitted uplink data channels acquired in the downlink control information DCI and/or the high-level configuration parameters.

In some possible implementations, the time unit format may be determined at least one of a higher layer parameter TDD-UL-DL-configuration common, TDD-UL-DL-configured determined, or DCI for configuration time.

For example, the time cell format is a slot format, including a pattern of slots, slot boundaries, and the like. The pattern of the slot contains the format of the symbols in the slot, e.g., uplink symbols, downlink symbols, and flexible symbols.

In some possible implementations the method further comprises: determining the repeated transmission times M for transmitting the uplink data channel according to at least one of the following items:

a time unit format;

and repeating the number of symbols of the uplink data channel in L times of repeated transmission of the uplink data channel.

In a second aspect, an apparatus for determining a TBS is provided to implement the method in the first aspect and/or any possible implementation manner thereof. The apparatus may be a terminal device or a network device, or may be an apparatus or a component in the terminal device or the network device, or may be an apparatus or a component that can be used with the terminal device or the network device. In one design, the apparatus may include a module corresponding to one for performing the method/operation/step/action described in the first aspect and/or any possible implementation manner thereof, and the module may be a hardware circuit, a software circuit, or a combination of a hardware circuit and a software circuit. In one design, the apparatus may include a first determination unit and a second determination unit.

In a third aspect, the present application provides a communication device comprising a processor configured to implement the method described in the first aspect and/or any possible implementation manner thereof. The apparatus may further comprise a memory coupled to the processor, the processor being configured to implement the method described in the above first aspect and/or any possible implementation thereof. Optionally, the processor is configured to store instructions, and when the processor executes the instructions stored in the memory, the method described in the above first aspect and/or any possible implementation manner thereof may be implemented. The apparatus may also include a communication interface for the apparatus to communicate with other devices, which may be, for example, a transceiver, circuit, bus, module, pin, or other type of communication interface.

In a fourth aspect, the present application provides a computer readable storage medium having stored thereon computer instructions which, when run on a computer, cause the computer to perform the method of the first aspect and any possible design thereof.

In a fifth aspect, the present application provides a chip comprising a processor. A processor is adapted to perform the method of the first aspect and any possible implementation thereof.

Optionally, the chip further comprises a memory, the memory being coupled to the processor.

Further optionally, the chip further comprises a communication interface.

In a sixth aspect, the present application provides a computer program product comprising computer program code which, when run on a computer, causes the computer to perform the method of the first aspect and any possible design thereof.

Drawings

Fig. 1 is an architecture diagram of a communication system according to an embodiment of the present application.

Fig. 2 is a schematic diagram of time domain resources provided in an embodiment of the present application.

Fig. 3 is a schematic diagram of a method for determining a size of a transport block according to an embodiment of the present application.

Fig. 4 is a schematic diagram of another method for determining a transport block size according to an embodiment of the present application.

Fig. 5 is a schematic block diagram illustrating an apparatus for determining a transport block size according to an embodiment of the present application.

Fig. 6 shows a schematic block diagram of an apparatus for determining a transport block size according to an embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, universal Mobile Telecommunications System (UMTS), fifth generation (5 g) system, new Radio (NR), future evolution communication system, and the like.

Referring first to the application scenario of the present application, fig. 1 is a schematic diagram of a communication system suitable for the present application.

The communication system includes a network device and a terminal device. The terminal device communicates with the network device through electromagnetic waves.

In the present application, the terminal device may be a device that includes a wireless transceiving function and can cooperate with a network device to provide a communication service for a user. In particular, a terminal device may refer to a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. For example, the terminal device may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network or a network after 5G, and the like, which is not limited in this embodiment of the application.

The embodiment of the application also relates to a network device. The network device may be a device for communicating with the terminal device, for example, may be an evolved Node B (eNB or eNodeB) in an LTE system, or the network device may be a relay station, an access point, a vehicle-mounted device, a wearable device, and a network side device in a future 5G network or a network after 5G or a network device in a future evolved PLMN network, and the like.

The network device may also be referred to as a Radio Access Network (RAN) device. The RAN equipment is connected with the terminal equipment and used for receiving data of the terminal equipment and sending the data to the core network equipment. The RAN device corresponds to different devices in different communication systems, for example, an evolved node B (eNB) in a 4G system, and a 5G system in a 5G system, such as an access network device in a new radio access technology (NR). The communication system in fig. 1 is only an example, and a communication system to which the present application is applied is not limited thereto, and for example, the number of network devices and terminal devices included in the communication system may be other numbers. For example, the communication system may also include more than two terminal devices.

In general, in order to improve reliability of transmission data, the terminal device may repeatedly (repeat) transmit the uplink data channel for multiple times, and the network device may receive the uplink data channel for multiple times. The TBS is the same for each repeated transmission of the uplink data channel. Therefore, the terminal device needs to determine the TBS when the uplink data channel is transmitted for the first time, and the TBSs of the uplink data channels transmitted except for the first transmission need not be determined additionally, and the TBS determined by the first transmission can be utilized.

It should be noted that the uplink data channel mentioned in this embodiment of the present application may also be an uplink data channel of a physical layer, for example, the uplink data channel of the physical layer may include a PUSCH, which is not limited in this embodiment of the present application. The uplink data channel is described as a PUSCH, but the PUSCH should not cause any limitation to the embodiments of the present application.

The determination of TBS when the terminal device and the network device transmit PUSCH for the first time is described below, and both the network device and the terminal device may determine TBS as follows.

1. Determining N 'number of Resource Elements (REs) used for transmitting PUSCH in one Physical Resource Block (PRB)' _RE 。

Wherein the content of the first and second substances,

the number of subcarriers in one PRB in frequency domain is different in different communication systems

The values may be different or the same, e.g. in LTE

And may be 12.

Is the number of symbols allocated to the PUSCH within one time unit, for example, the time unit is a slot (slot).

Is the number of REs occupied by the reference signal per PRB determined according to the higher layer parameters or physical layer parameters, for example, the reference signal may be a demodulation reference signal (DMRS),

is an additional overhead, e.g.

Is the overhead of the parameter xOverhead in the higher layer IE PUSCH-ServinCellConfig, if the overhead of xOverhead is not configured, then

Is 0.

It should be noted that the higher layer mentioned in the embodiments of the present application may include a Radio Link Control (RLC) layer and/or a Medium Access Control (MAC) layer.

The RE number N 'for PUSCH transmission' _RE Is only determined by way of example, but should not cause any limitation to the embodiments of the present application, N 'in different communication systems' _RE The manner of determination of (c) may be different. The embodiments of the present application do not limit this.

2. Determining the total number of REs N _RE

N _RE ＝min(156,N' _RE ).n _PRB

n _PRB And allocating the base station to the total PRB number of the terminal equipment.

3. Determining TBS

N' _TBS ＝N _RE ·R·Q _m ·υ

Where R is the code rate (available by table lookup), Q _m For modulation order (available by table lookup), upsilon is the number of spatial layers (available by configuration or table lookup). Need to be N' _TBS And obtaining the TBS for transmitting the PUSCH after quantization table look-up.

As can be seen from the above-described procedure for determining the TBS,

the number of symbols which are allocated by the network equipment to the terminal equipment in a time unit and are used for transmitting the PUSCH each time is the number of symbols which are allocated by the network equipment in a time unit and are used for transmitting the PUSCH each time, and when the network equipment also configures repeated transmission times for repeatedly transmitting the PUSCH for the terminal equipment and repeatedly transmits the PUSCH for multiple times, the symbols which are allocated to the PUSCH in a time unit for transmitting the PUSCH each time

Should be the same so that the TBS of the multiple repeated transmissions of PUSCH is the same. But the number of symbols of the PUSCH actually transmitted repeatedly by the terminal equipment at each time is not the number of symbols configured by the network equipment due to the following reasons, and even the actual number of repeated transmissions is not the number of repeated transmissions configured by the network equipment. For example, the number of symbols of the PUSCH transmitted repeatedly actually every time may be different from the number of symbols of the PUSCH transmitted repeatedly every time configured by the network device, and/or the number of times of actual repeated transmission may be different from the number of times of repeated transmission configured by the network device.

For one reason, in the TDD-UL-DL-common configuration (TDD-UL-DL-configuration common) and/or the TDD-UL-DL-configured dedicated configuration (TDD-UL-DL-configured) in the higher layer configuration transmitted by the network device to the terminal device, some symbols may be set as downlink symbols or flexible symbols, and these symbols set as downlink symbols or flexible symbols may also be configured by the network device to transmit symbols of the PUSCH, that is, two or more symbols are configured to be transmitted at these symbol positions, resulting in configuration conflicts, and therefore these symbols at the conflict positions are not configured to be symbolsThe symbols capable of transmitting PUSCH result in the reduction of the number of symbols for certain retransmitted PUSCHs, i.e. for certain retransmissions

Decrease; even the time slot of these symbols cannot transmit the PUSCH symbol, and if one time slot corresponds to one retransmission, the number of repeated transmissions is reduced. That is, this case may result in a reduction in the number of symbols for some retransmissions or a reduction in the number of retransmissions.

For the second reason, one repetition cannot span a slot. If for a certain repetition crossing the slot boundary, it will result in an increased number of repeated transmissions (i.e. one repetition becomes two repetitions) and a reduced number of symbols for some repeated transmissions of PUSCH. As shown in fig. 2, the high layer configures or Downlink Control Information (DCI) configures 4 retransmissions, each retransmission occupies 4 symbols, and one slot is 10 symbols, then 4 symbols of the 3 rd transmission are split into two transmissions, each transmission occupies 2 symbols, so that the actual number of retransmissions becomes 5, and the 3 rd and 4 th transmissions occupy 2 symbols, instead of 4 symbols. That is, this situation may result in an increased number of repeated transmissions and a reduced number of symbols for some of the repeated transmissions.

For the third reason, a certain repeated transmission may be an uplink or downlink handover, and the certain repeated transmission may also be split. This will cause the number of retransmissions to increase and some of the number of retransmitted symbols to decrease.

For the fourth reason, in the configuration granted (configured grant) transmission process, the number of repeated transmissions may be affected due to the configuration of the Redundancy Version (RV), for example, the higher layer is configured or the DCI is configured with 4 transmissions, the RV sequence is {0,3,0,3}, the first transmission is to occur on the transmission opportunity of RV =0 in 4 transmission opportunities, that is, the first transmission may start from the second 0 of the RV sequence, and may be transmitted only 2 times, which may result in the reduction of the number of repeated transmissions. In the configuration permission transmission, the terminal device may transmit the PUSCH using the uplink resource without DCI scheduling transmitted by the network device.

Of course, in the embodiment of the present application, the number of symbols of the PUSCH repeatedly transmitted in each time actually may be different from the number of symbols of the PUSCH repeatedly transmitted in each time configured by the network device for other reasons, and/or the number of times of actual repeated transmission is different from the number of times of repeated transmission configured by the network device, and for avoiding repeated description, this embodiment of the present application is not described in detail herein.

As can be seen from the above discussion, the TBS transmitted in each repetition is identical to the TBS transmitted in the first transmission, and therefore it is particularly important to determine an accurate TBS in the first transmission, and if the TBS determined in the first transmission is the TBS determined in the first repetition with the smallest actual number of symbols occupied in multiple repetitions, the code rate of the repetitions with a larger number of symbols occupied in the multiple repetitions is reduced, thereby affecting the transmission efficiency. In other words, the TBS is determined for the first transmission in the formula

Choosing the minimum value in a certain transmission relative to

In larger repeated transmission, only the code rate R can be reduced, which can cause the problem of reduced transmission efficiency; if the TBS determined during the first transmission is a TBS that is transmitted repeatedly for one time and occupies the largest number of symbols in multiple repeated transmissions, the code rate of the repeated transmission that occupies a small number of symbols in the multiple repeated transmissions is too high, which results in no way of decoding. In other words, the first transmission determines the formula for TBS

The maximum value in a certain transmission is selected, relative to

In smaller repeated transmission, the code rate R can only be increased, and if the code rate R is too high, decoding can not be performedIn order to avoid too high code rate R, the modulation order Q can be reduced _m This reduces spectral efficiency. Therefore, how to make the determined TBS guarantee transmission efficiency and also take into account spectrum efficiency when transmitting for the first time.

The method for determining TBS according to the embodiments of the present application is described below with reference to the accompanying drawings.

Fig. 3 illustrates a method 300 for determining a TBS according to an embodiment of the present application, where the method 300 may be performed by a terminal device or a network device, and the embodiment of the present application is not limited thereto. The method 300 includes:

s310, determining N times of repeatedly transmitting uplink data channels, wherein the N times of repeatedly transmitting uplink data channels are the first N times of M times of repeatedly transmitting uplink data channels, M is larger than or equal to N, and M and N are positive integers.

It should be understood that the M retransmission uplink data channels may be understood as actual M retransmission uplink data channels, and in S320, the TBS of the M actual retransmission uplink data channels may be determined by using the number of symbols of the previous N retransmission uplink data channels of the actual retransmission uplink data channel.

Optionally, the uplink data channel may be an uplink data channel of a physical layer, and the uplink data channel of the physical layer may include a PUSCH.

Optionally, S310 includes: determining the N times of repeated transmission uplink data channels according to a mapping relationship, where the mapping relationship is used to indicate a corresponding relationship between a number M of repeated transmissions and a number N of repeated transmissions (which may also be referred to as a first mapping relationship), or the mapping relationship is used to indicate a corresponding relationship between a number L of repeated transmissions obtained in downlink control information DCI and/or a high-level configuration parameter and the number N of repeated transmissions (which may also be referred to as a second mapping relationship), where L is a positive integer, or the mapping relationship is used to indicate a corresponding relationship between a redundancy version and the number N of repeated transmissions (which may hereinafter be referred to as a third mapping relationship).

Determining the upload data channel for N times of repeated transmission according to the first mapping relationship, the second mapping relationship, or the third mapping relationship is described below with reference to five cases.

Situation one

Step 1: the method 300 further includes: determining the repeated transmission times M for transmitting the uplink data channel according to at least one of the following items:

a time unit format;

a number of iterative transmission times L obtained in Downlink Control Information (DCI) (e.g., the DCI is used to schedule an uplink data channel) and/or in a higher layer configuration parameter;

and repeating the transmission of the symbols of the uplink data channel for each time in the L times of repeated transmission of the uplink data channels.

Alternatively, the time unit format may be determined in TDD-UL-DL-configuration common and/or TDD-UL-DL-configured determined. The time unit format may cause a change in the number of retransmission times L configured in the DCI or the high-level configuration parameter and the number of symbols of each uplink data channel for retransmission in the uplink data channel for retransmission of L times, and may determine the number of retransmission times M for actually transmitting the uplink data channel. Optionally, the RV may also cause the configured number L of repeated transmissions in the higher-layer configuration parameter to change, and the actual number M of repeated transmissions may also be determined according to the RV in combination with the configured number L of repeated transmissions.

For example, the time cell format is a slot format, including a pattern of slots, slot boundaries, and the like.

And 2, determining the uplink data channel for repeated transmission for N times according to a first mapping relation, wherein the first mapping relation is used for indicating the corresponding relation between the repeated transmission times M and the repeated transmission times N.

Specifically, for example, the first mapping relationship is shown in table 1, if M in step 1 is 2, N may be 1, that is, if the network device or the terminal device determines that the number of times of actually repeatedly transmitting the uplink data channel is 2, the terminal device and the network device may determine that the TBS of 2 times of actually repeatedly transmitting the uplink data channel is determined by using the number of symbols of the uplink data channel actually repeatedly transmitted 1 time of the uplink data channel actually repeatedly transmitted 2 times; if M in step 1 is 5, N is 3, that is, if the network device and the terminal device determine that the number of times of actually repeatedly transmitting the uplink data channel is 5, the terminal device and the network device may determine the TBS of the uplink data channel for 5 times of actually repeatedly transmitting the uplink data channel by using the number of symbols of the uplink data channel for the first 3 times of actually repeatedly transmitting the uplink data channel for 5 times, and so on.

TABLE 1

N	M
			1	2
2	3
		3	5
4	6
		6	8

And 3, determining the symbol number of the uplink data channel repeatedly transmitted each time in the uplink data channels repeatedly transmitted N times according to at least one of the repeated transmission times L and the symbol number of the uplink data channel repeatedly transmitted each time in the uplink data channels repeatedly transmitted L times which are obtained in the DCI (such as the uplink data channel scheduled by the DCI user) and/or the high-level configuration parameters.

It should be noted that, in step 1, the number of symbols of the uplink data channel repeatedly transmitted each time in the uplink data channel repeatedly transmitted M times may also be determined at the same time, so that it is not necessary to determine the number of symbols of the uplink data channel repeatedly transmitted N times in step 3, and the number of symbols of the uplink data channel N times before can be obtained from the number of symbols of the uplink data channel M times.

It should be understood that the first mapping relationship may be either preset or protocol-specified; if the method 300 is performed by a terminal device, the method 300 further includes: the network equipment sends the first mapping relation to the terminal equipment, and the terminal equipment receives the first mapping relation sent by the network equipment.

Situation two

Step 1: prior to S310, the method 300 further includes: according to the repeated transmission times L obtained in the downlink control information DCI (for example, the DCI user schedules the uplink data channel) and/or the high-level configuration parameters and the symbol number of the uplink data channel repeatedly transmitted each time in the uplink data channel repeatedly transmitted for L times.

And 2, determining the data channel on the repeated transmission for N times according to a second mapping relation, wherein the second mapping relation is used for indicating the corresponding relation between the repeated transmission times L and the repeated transmission times N, which are acquired in the downlink control information DCI and/or the high-level configuration parameters.

Specifically, for example, the second mapping relationship is as shown in table 2. If L in step 1 is 3, N may be 2, that is, if the number of times of repeatedly transmitting the uplink data channel configured in the DCI and/or the higher-layer configuration parameter is 3, the terminal device and the network device may determine to determine the TBS of actually repeatedly transmitting the uplink data channel for M times using the number of symbols of the uplink data channel for the first 2 times of actually repeatedly transmitting the uplink data channel for M times (at this time, it may not be necessary to know a specific value of M, or it may be understood that: determining the number of symbols of the uplink data channel repeatedly transmitted for multiple times by adopting the number of symbols of the uplink data channel actually repeatedly transmitted for the first 2 times (the number of times can be unknown) repeatedly transmitting the uplink data channel for multiple times; if L in step 1 is 8, N is 6, that is, if the number of times of repeatedly transmitting the uplink data channel configured in the DCI and/or the higher layer configuration parameter is 8, the terminal device and the network device may determine the TBS of the uplink data channel for actual repeated transmission M times by using the number of symbols of the uplink data channel for actual repeated transmission 6 times of the uplink data channel for actual repeated transmission M times, or may be understood as: and determining the number of the symbols of the uplink data channel repeatedly transmitted for multiple times by adopting the number of the symbols of the uplink data channel actually repeatedly transmitted for the first 6 times (the number can be unknown) of the uplink data channel repeatedly transmitted for multiple times, and so on.

TABLE 2

N	L
			2	3
3	4
		4	6
6	8
		6	8

Step 3, determining the number of symbols of each uplink data channel repeatedly transmitted in the uplink data channels repeatedly transmitted for N times according to at least one of the following items:

a time unit format;

the number of repeated transmissions L obtained in DCI (e.g., the DCI user schedules an uplink data channel) and/or in a higher layer configuration parameter;

It should be understood that the second mapping relationship may be either preset or protocol-specified; if the method 300 is performed by a terminal device, the method 300 further includes: and the network equipment sends the second mapping relation to the terminal equipment, and the terminal equipment receives the second mapping relation sent by the network equipment.

Situation three

Step 1: the method 300 further comprises: the RV is obtained according to the downlink control information DCI (for example, the DCI user schedules the uplink data channel) and/or the high-layer configuration parameters. The RV version corresponds to L times of repeated transmission of the uplink data channel in the DCI and/or in the higher layer configuration parameters.

And 2, determining a data channel on the N repeated transmissions according to a third mapping relation, wherein the third mapping relation is used for indicating the corresponding relation between the redundancy version and the repeated transmission times N.

Specifically, for example, the third mapping relationship is shown in table 3. If the RV in step 1 is 0303, N may be 2, that is, if the RV is 0303 configured in the DCI and/or the higher-layer configuration parameter, the terminal device and the network device may determine that the TBS of the uplink data channel is actually repeatedly transmitted M times, where the TBS is determined by using the number of symbols of the uplink data channel actually repeatedly transmitted M times (at this time, it may not be necessary to know a specific value of M, and it may also be unnecessary to determine M) times of actual repeatedly transmitted uplink data channels, or may be understood as: determining the number of symbols of the uplink data channel repeatedly transmitted for multiple times by adopting the number of symbols of the uplink data channel actually repeatedly transmitted for the first 2 times (the number of times can be unknown) repeatedly transmitted for multiple times; if the RV in step 1 is 0312, then N is 4, that is, if the RV is 0312 configured in the DCI and/or the high-level configuration parameter, the terminal device and the network device may determine that the TBS of the uplink data channel is actually transmitted repeatedly M times, where the TBS is determined by the number of symbols of the uplink data channel actually transmitted repeatedly M times (at this time, it may not be necessary to know a specific value of M, or it may be understood that: determining the number of symbols of the uplink data channel repeatedly transmitted for multiple times by adopting the number of symbols of the uplink data channel actually repeatedly transmitted for the first 4 times (the number of times can be unknown) repeatedly transmitted for multiple times; if RV in step 1 is 0000, N is 1, that is, if RV is configured in DCI and/or in a higher-layer configuration parameter to be 0000, the terminal device and the network device may determine to determine the TBS of the uplink data channel for M times of actual repeated transmission by using the number of symbols of the uplink data channel for the first 1 times of actual repeated transmission of the uplink data channel for M times (at this time, it may not be necessary to know a specific value of M, and it may also be unnecessary to determine M), or may be understood as: and determining the number of the symbols of the uplink data channel repeatedly transmitted for multiple times by adopting the number of the symbols of the uplink data channel actually repeatedly transmitted for the first 1 times (the number can be unknown) of the uplink data channel repeatedly transmitted for multiple times, and so on.

TABLE 3

N	RV
			2	0303
4	0312
		1	0000

a time unit format;

the number of repeated transmission times L and the number of symbols of each repeated transmission uplink data channel in the repeated transmission uplink data channel of L times, which are obtained in DCI (for example, the DCI user schedules the uplink data channel) and/or in the higher layer configuration parameter.

It should be understood that the third mapping relationship may be either preset or protocol-specified; if the method 300 is performed by a terminal device, the method 300 further includes: and the network equipment sends the third mapping relation to the terminal equipment, and the terminal equipment receives the third mapping relation sent by the network equipment.

Situation four

Step 1: the method 300 further includes: according to the repeated transmission times L obtained in the downlink control information DCI (for example, the DCI user schedules the uplink data channel) and/or the high-level configuration parameters and the symbol number of the uplink data channel repeatedly transmitted each time in the uplink data channel repeatedly transmitted for L times.

Step 2, determining the actual repeated transmission times M for transmitting the uplink data channel according to at least one of the following items:

a time unit format;

the number of repeated transmissions L obtained in the DCI and/or the high-level configuration parameter;

And 3, determining the data channel on the repeated transmission for N times according to a second mapping relation, wherein the second mapping relation is used for indicating the corresponding relation between the repeated transmission times L and the repeated transmission times N, which are acquired in the downlink control information DCI and/or the high-level configuration parameters.

Specifically, for example, the second mapping relationship is shown in table 4, and the column M in table 4 is obtained according to L, i.e., step 2 described above. If L in step 1 is 3, N may be 2, and M is 4 when L is 3 determined in step 1, that is, if the number of times of repeatedly transmitting the uplink data channel configured in the DCI and/or the high-level configuration parameter is 3, the terminal device and the network device may determine to determine the number of symbols of the uplink data channel actually repeatedly transmitted for 4 times by using the number of symbols of the uplink data channel actually repeatedly transmitted for the first 2 times of the uplink data channel actually repeatedly transmitted for 4 times; if L in step 1 is 8, N is 6, and M is 7 when L is 8 according to the determination in step 1, that is, if the number of times of repeatedly transmitting the uplink data channel configured in the DCI and/or the high-layer configuration parameter is 8, the terminal device and the network device may determine the TBS of actually repeatedly transmitting the uplink data channel for 7 times by using the number of symbols of the actually repeatedly transmitting uplink data channel for the first 6 times of actually repeatedly transmitting the uplink data channel for 7 times, and so on.

TABLE 4

And 4, determining the number of the symbols of the uplink data channel repeatedly transmitted each time in the uplink data channels repeatedly transmitted N times according to the time unit format, at least one of the number of times of repeated transmission L obtained in DCI (for example, the uplink data channel scheduled by the DCI user) and/or the number of the symbols of the uplink data channel repeatedly transmitted each time in the uplink data channels repeatedly transmitted L times.

It should be noted that, in step 2, the number of symbols of the uplink data channel repeatedly transmitted each time in the uplink data channel repeatedly transmitted M times may also be determined at the same time, so that it is not necessary to determine the number of symbols of the uplink data channel repeatedly transmitted N times in step 4, and the number of symbols of the uplink data channel N times before can be obtained from the number of symbols of the uplink data channel M times.

Situation five

Step 1: prior to S310, the method 300 further includes: the RV is obtained according to downlink control information DCI (for example, uplink data channel scheduling of the DCI user) and/or high-layer configuration parameters. The RV version corresponds to L times of repeatedly transmitting uplink data channels in the DCI and/or in the high-level configuration parameters.

a time unit format;

the number of repeated transmission times L is obtained in DCI and/or high-layer configuration parameters;

and repeating the symbol number of the uplink data channel in L times of repeated transmission of the uplink data channel.

And 3, determining the data channel on the N repeated transmissions according to a third mapping relation, wherein the third mapping relation is used for indicating the corresponding relation between the redundancy version and the repeated transmission times N.

Specifically, for example, the third mapping relationship is shown in table 5, and the column M in table 5 is obtained according to L in step 2. If the RV in step 1 is 0303, N may be 2, and M is 5 when L is L1 determined in step 2, that is, if the RV configured with L1 retransmissions in the DCI and/or the high-level configuration parameter is 0303, the terminal device and the network device may determine to determine the TBS of the uplink data channel for 5 actual retransmissions by using the number of symbols of the uplink data channel for the previous 2 actual retransmissions of the uplink data channel for 5 actual retransmissions; if the RV in step 1 is 0312, N is 4, and M is 6 when L is L2 determined according to step 2, that is, if the RV configured with L2 times of repeated transmission in DCI and/or in a high-level configuration parameter is 0312, the terminal device and the network device may determine the number of symbols of the uplink data channel actually transmitted repeatedly for 6 times, to determine the TBS of the uplink data channel actually transmitted repeatedly for 6 times; if the RV in step 1 is 0000, N is 1, and M is 4 when L is L3 determined in step 2, that is, if the RV configured with L3 times of repeated transmission in the DCI and/or the high-level configuration parameter is 0000, the terminal device and the network device may determine the number of symbols of the uplink data channel actually transmitted repeatedly for 4 times, to determine the TBS of the uplink data channel actually transmitted repeatedly for 4 times.

TABLE 5

N	RV	M
				2	0303	5
4	0312	6
			1	0000	4

Step 4, determining the number of the symbols of the uplink data channel repeatedly transmitted each time in the uplink data channels repeatedly transmitted for N times according to at least one of the following items:

a time unit format;

It should be noted that, in step 2, the number of symbols of the uplink data channel repeatedly transmitted each time in the uplink data channel repeatedly transmitted M times may also be determined at the same time, so that it is not necessary to determine the number of symbols of the uplink data channel repeatedly transmitted N times in step 4 again, and the number of symbols of the uplink data channel N times before can be obtained from the number of symbols of the uplink data channel M times.

Of course, the mapping relationship is not limited to the description of the above five cases, and may be in other manners, for example, when the number of repeated transmissions is M1, and the resource for transmitting the uplink data channel is F1, it may be determined that the uplink data channel is repeatedly transmitted M1 times by using the number of symbols of the uplink data channel transmitted N1 times; if the number of retransmission times is M2 and the resource for transmitting the uplink data channel is F2, it may be determined that the TBS for the uplink data channel for M2 times of retransmission is determined by the number of symbols for the uplink data channel for the previous N2 times of transmission.

It should be noted that, in the embodiment of the present application, the uplink data channel for repeated transmission for N times is not limited to be determined according to the mapping relationship, and the uplink data channel for repeated transmission for N times may also be determined according to a preset algorithm or in another manner.

S320, determining the TBS of the M times of repeated transmission uplink data channels according to the symbol number of the previous N times of repeated transmission uplink data channels.

It should be understood that the number of symbols is the number of time domain symbols, for example, the number of time domain symbols may be the number of OFDM symbols or DFT-s-OFDM symbols.

Specifically, the TBS of the M retransmission uplink data channels may be determined according to the number of symbols of the previous N retransmission uplink data channels in one of the following four manners.

In a first mode, the TBS of the uplink data channel with M repeated transmissions is determined according to the total number of symbols of the uplink data channel with N repeated transmissions.

Specifically, when the TBS is determined by using the total number of symbols of the uplink data channel for M times of repeated transmission when the uplink data channel is transmitted for the first time in the uplink data channel for M times of repeated transmission, this may result in that

Too large, if

Too large, the transmission will occupy less symbols in multiple retransmissionsThe code rate of (2) is too high, so that decoding cannot be achieved, and in order to avoid too high code rate, the problem of poor spectrum efficiency caused by reduction of modulation order may be needed. The embodiments of the present application may add the number of symbols of the uplink data channel with N times of repeated transmission to obtain the total number of symbols, that is, the total number of symbols is obtained in the formula for calculating the TBS

The total number of symbols of the uplink data channel is repeatedly transmitted for N times, but not the total number of symbols of the uplink data channel is repeatedly transmitted for M times, so that when the TBS is determined by adopting the total number of symbols of the uplink data channel repeatedly transmitted for N times, the calculation of the TBS formula can be reduced

The size of the code rate is small, so that the code rate of repeated transmission with less occupied symbols in repeated transmission is not too high, and the problem of low frequency efficiency is not caused. Further, when the terminal device determines the transport block TBS of the uplink data channel for M times of repeated transmission by using the total number of symbols of the uplink data channel for the previous N times of repeated transmission, it is beneficial to improve the success rate that the network device can decode the uplink data channel for the previous N times of repeated transmission, that is, when the remaining uplink data channel for the last M-N times of repeated transmission is not available, the network device can decode correctly to a certain extent, so that the time delay of receiving the uplink data channel by the network device can be reduced.

And determining the TBS of the M times of repeated transmission uplink data channels according to the maximum symbol number in the symbol numbers of the previous N times of repeated transmission uplink data channels.

Specifically, when the TBS is determined by using the maximum symbol number of the uplink data channel for M times of repeated transmission when the uplink data channel is transmitted for the first time in the uplink data channel for M times of repeated transmission, this may result in that

Too large, if

Too large will causeThe code rate of the repeated transmission with less symbol number occupied in the repeated transmission is too high, so that the decoding is not realized, and the problem of poor spectrum efficiency caused by the fact that the code rate is too high and the modulation order possibly needs to be reduced is solved. In the scheme of the embodiment of the application, the maximum number of the symbols in the number of the symbols of the uplink data channel repeatedly transmitted for the previous N times is smaller than the maximum number of the symbols in the number of the symbols of the uplink data channel repeatedly transmitted for the M times to a certain extent, so that the scheme of the embodiment of the application can properly reduce the number of the symbols of the uplink data channel repeatedly transmitted for the previous N times

The code rate of repeated transmission with less symbol occupation in repeated transmission for many times is not too high, and the problem of low frequency efficiency is not caused. Further, when the terminal device determines the transport block TBS of the uplink data channel for M times of repeated transmission by using the maximum symbol number of the uplink data channel for the previous N times of repeated transmission, it is beneficial to improve the success rate that the network device can decode the uplink data channel for the previous N times of repeated transmission, that is, when the remaining last uplink data channel for M-N times of repeated transmission is not available, the network device can decode correctly to a certain extent, so that the time delay of the network device for receiving the uplink data channel can be reduced.

And determining the TBS of the uplink data channel repeatedly transmitted for M times according to the minimum symbol number in the symbol numbers of the uplink data channel repeatedly transmitted for the previous N times.

Specifically, when the TBS is determined by using the minimum symbol number of the uplink data channel for M times of repeated transmission when the uplink data channel is first transmitted among the uplink data channels for M times of repeated transmission, this may result in that

Too small, if

If the code rate is too small, the code rate of the repeated transmission which occupies a large number of symbols in the repeated transmission is too low, and the transmission efficiency is reduced. The scheme of the embodiment of the application has the minimum number in the symbol number of the uplink data channel repeatedly transmitted for the previous N timesThe number of symbols is larger than the minimum number of symbols in the number of symbols of the uplink data channel repeatedly transmitted for M times to a certain extent, so the scheme of the embodiment of the application can be increased appropriately

The code rate of the repeated transmission which occupies more symbols in the repeated transmission for a plurality of times is not too low, which is beneficial to improving the transmission efficiency. Further, when the terminal device determines the transport block TBS of the uplink data channel for M times of repeated transmission by using the minimum symbol number of the uplink data channel for the previous N times of repeated transmission, it is beneficial to improve the success rate that the network device can decode the uplink data channel for the previous N times of repeated transmission, that is, when the remaining uplink data channel for the last M-N times of repeated transmission is not yet transmitted, the network device can decode correctly to a certain extent, so that the time delay of receiving the uplink data channel by the network device can be reduced.

And determining the TBS of the M times of repeated transmission uplink data channels according to the average symbol number of the previous N times of repeated transmission uplink data channels. Alternatively, the TBS for the M times of repeated transmission of the upload data channel may be determined after rounding the average symbol number, for example, the rounding operation may be an upper rounding operation or a lower rounding operation, which is not limited in this embodiment of the present application.

Too small, if

If the code rate is too small, the code rate of the repeated transmission which occupies a large number of symbols in the repeated transmission is too low, and the transmission efficiency is reduced. If the total symbol number or the maximum symbol number of the uplink data channel with M times of repeated transmission is adopted to determine the TBS, the method results in

Too large, if

If the code rate is too large, the code rate of the repeated transmission with a small number of occupied symbols in the repeated transmission is too high, so that decoding cannot be performed, and in order to avoid the problem that the spectrum efficiency is poor due to the fact that the code rate is too high and the modulation order needs to be reduced. By adopting the scheme of the embodiment of the application, after the average number of the symbols of the uplink data channel repeatedly transmitted for the previous N times is rounded, the average number of the symbols is larger than the minimum number of the symbols of the uplink data channel repeatedly transmitted for the M times to a certain extent, and is smaller than the maximum number of the symbols of the uplink data channel repeatedly transmitted for the M times. Therefore, the scheme of the embodiment of the application can be balanced properly

So that

The method is not too large or too small, can give consideration to small repeated transmission with large symbol number in repeated transmission, and can give consideration to both transmission efficiency and spectrum efficiency. Further, when the terminal device determines the transport block TBS of the uplink data channel for M times of repeated transmission after rounding the average symbol number of the uplink data channel for the previous N times of repeated transmission, it is beneficial to improve the success rate that the network device can decode the uplink data channel for the previous N times of repeated transmission, that is, when the remaining last uplink data channel for M-N times of repeated transmission is not yet transmitted, the network device can decode correctly to a certain extent, so that the time delay of the network device for receiving the uplink data channel can be reduced.

It should be noted that, in the embodiment of the present application, determining the TBS of the uplink data channel for M times of repeated transmission according to the number of symbols of the uplink data channel for N previous times of repeated transmission is not limited to the four manners described above, and may also be other manners, for example, the TBS may be determined according to the number of symbols obtained after mathematical operation on the number of symbols of the uplink data channel for N previous times of repeated transmission, which is not limited in this embodiment in order to avoid redundancy.

It should be understood that the definition of the number of repeated transmissions in the embodiment of the present application is not limited in any way, and the aforementioned number of repeated transmissions M and N may be replaced by a repetition level, one repetition level may include one or more repeated transmissions, and if one repetition level includes one repeated transmission, the repetition level and the repeated transmission may be interchanged.

The method 400 for determining a TBS in the embodiment of the present application is described below with reference to fig. 4, where the TBS is determined by a terminal device as an example, and a manner of determining the TBS by a network device is similar to that of determining the TBS by the terminal device, and for avoiding repeated description, detailed description is not repeated in the embodiment of the present application. The method 400 is described by taking a time unit format as a time slot format and an uplink data channel as a PUSCH as an example, and the method 400 includes:

s410, the terminal device receives the higher layer IE TDD-UL-DL-configuration common and/or TDD-UL-DL-configuration determined, and determines the first format (also called time unit format) of each slot.

One slot may be configured to transmit downlink symbols, uplink symbols, and flexible symbols.

The slot format is determined by the higher layer IE TDD-UL-DL-configuration common received by the terminal device. The TDD-UL-DL-configuration common may include parameters: reference subcarrier spacing configuration (indicated with reference subcarrier spacing) mu _ref And Pattern 1. Relevant parameters of Pattern1 include a slot configuration period of P milliseconds (indicated by dl-UL-Transmission periodicity), a slot number containing only downlink symbols (indicated by nrofDownlinkSlots), d _slots And the number of downlink symbols (indicated by nrofDownlinkSymbols) d _sym The number of slots (indicated by nrofUplinkSlots) u containing only the uplink symbols _slots And the number of uplink symbols (indicated by nrofuplink symbols) u _sym

One slot configuration period P milliseconds includes

Subcarrier spacing of mu _ref Slot of (c). Front d of these S slots _slots Each slot only contains downlink symbols, the last u _slots Each slot only containsAnd uplink symbols. d _slots D after a downlink slot _sym The symbol is a downlink symbol, u _slots U before one uplink slot _sym One symbol is an uplink symbol, the rest

The symbols are flexible symbols.

If TDD-UL-DL-configuration common includes pattern1 and pattern2, the terminal device sets S slots indicated by the former pattern1 as pattern1, and sets S indicated by the latter pattern2 as pattern1 ₂ The slots are set as pattern 2.

The relevant parameters of Pattern2 include a P ₂ A slot configuration period of milliseconds (indicated by dl-UL-transmissionPeriodicity), a number of slots containing only downlink symbols (indicated by nrofDownlinkSlots), d _slots,2 And the number of downlink symbols (indicated by nrofDownlinkSymbols) d _sym Slot number u including only uplink symbol _slots,2 (indicated by nrofUplinkSlots), number of uplink symbols (indicated by nrofUplinkSymbols) u _sym,2

One slot configuration period P + P ₂ The millisecond comprises a first part

Slot and second part

A slot second part S ₂ The uplink and downlink of the slot symbols is similar to the first part

And (4) confirming the slot.

A terminal device may additionally configure TDD-UL-DL-configdetermined, and may configure the flexible symbols in each slot of the TDD-UL-DL-configuration common configuration as uplink symbols or downlink symbols. The TDD-UL-DL-configuration common includes a plurality of sets of slot configurations, each set of slot configurations including: a slot number (indicated by slot index) and a configuration of a set of symbols (symbols) in the slot, if symbols = allDownlink, all symbols in the slot are downlink symbols; if symbols = allUplink, then all symbols in this slot are uplink symbols; if symbols = explicit, nrofDownlinkSymbols indicates the number of downlink symbols at the beginning of a slot, if nrofDownlinkSymbols do not exist, it indicates no downlink symbols, nrofUplinkSymbols indicates the number of uplink symbols before the end of a slot, if nrofUplinkSymbols do not exist, it indicates no uplink symbols, and the other symbols are flexible symbols.

The second format of the slot of the higher layer configuration may be determined according to the TDD-UL-DL-configuration common and TDD-UL-DL-configuration determined described above.

The terminal device may also be configured to periodically receive DCI format 2_0, where the SFI-index field of DCI format 2_0 indicates the slot format of several slots of the terminal device from the detection of DCI format 2_0. The slot number indicated in DCI format 2_0 is greater than the receiving period of DCI format 2_0. Different values of the SFI-index field indicate different symbol settings.

The terminal device may determine the final first format of each slot by combining the DCI format 2_0 and the second format of the slot.

It should be noted that the terminal device may not receive DCI format 2_0, and then the first format of the slot is the same as the second format, that is, in step S430 below, the terminal device may also determine, according to the second format, the number of times of repeated transmission M of the PUSCH actually transmitted by the terminal device and the number of symbols of the PUSCH repeatedly transmitted each time in the M times of repeated transmission PUSCH.

S420, the terminal equipment determines the repeated transmission times L for transmitting the PUSCH and the number of symbols of the PUSCH repeatedly transmitted each time in the repeated transmission times L for transmitting the PUSCH. The different types of the transmission PUSCHs determine that the repeated transmission times L of the transmission PUSCHs are different from the symbol number of each repeated transmission PUSCH in the repeated transmission PUSCHs of the times L.

For PUSCH transmission based on dynamic scheduling, a terminal device performs scheduling using DCI of a physical layer every time PUSCH is transmitted, and when the terminal device receives DCI scheduling PUSCH, DCI indicates a symbol number (also referred to as a nominal symbol number) of each repeated transmission and a starting symbol position (also referred to as a nominal symbol number) of each repeated transmission, for example, the symbol number of PUSCH of each repeated transmission may be set to be the same, and the terminal device may obtain the symbol number of each repeated transmission in DCI. Meanwhile, the terminal device may determine the number of iterative transmissions L in the higher layer parameter.

For configuring a permission type1 (type 1) for transmitting PUSCH, the terminal equipment receives a rrc-configurable uplink grant of a higher layer, and determines the number of times of repeated transmission L, the number of symbols for repeatedly transmitting PUSCH each time and the number of starting symbols according to repK, period, and time Domain offset in the rrc-configurable uplink grant.

For configuring a permission type 2 (type 1) for transmitting PUSCH, the terminal equipment receives a higher layer IE rrc-configurable uplink Grant, and determines the repeated transmission times L, the number of symbols for repeatedly transmitting PUSCH each time and the number of starting symbols according to the repK, the period and the time domain resource allocation field in the IE rrc-configurable uplink Grant.

It should be noted that, in the embodiment of the present application, the order of S410 and S420 is not limited at all, and S410 may be performed before or after S420, or simultaneously.

S430, the terminal device adjusts the number of repeated transmission times L in S420 and the number of symbols for each repeated transmission of the PUSCH according to the first format of each slot determined in S410, and the terminal device determines the number of repeated transmission times M for actually transmitting the PUSCH.

Optionally, the terminal device adjusts the number of times of repeated transmission L and the number of symbols of the PUSCH repeatedly transmitted each time in S420 according to the first format of each slot determined in S410 and the Redundancy Version (RV) of the PUSCH repeatedly transmitted each time, and determines the number of times of repeated transmission M of the PUSCH actually transmitted by the terminal device (optionally, the number of symbols of the PUSCH repeatedly transmitted each time in the PUSCH repeatedly transmitted M times may also be determined at the same time). For the transmission of configuration grant type1 and grant type 2, the RV may be determined from the repK-RV in the IE rrc-configurable uplink grant.

As an alternative manner of S410 and S430, the terminal device may further adjust the number L of repeated transmissions in S420 and the number of symbols of the PUSCH transmitted repeatedly each time according to the switching point of the uplink and the downlink, and determine the number M of repeated transmissions of the PUSCH actually transmitted by the terminal device (optionally, the number of symbols of the PUSCH transmitted repeatedly each time in the PUSCH transmitted repeatedly M times may also be determined simultaneously).

Alternatively, the method 400 may not include S430, that is, the number M of repeated transmissions of the PUSCH is not required to be determined, in other words, the terminal device may not need to know what the specific value of the number M of repeated transmissions of the PUSCH is actually repeated.

S440, the terminal equipment determines the uplink data channel repeatedly transmitted for the previous N times.

Specifically, the terminal device determines the uplink data channel for the first N times of repeated transmission of the uplink data channel for M times according to the first mapping relationship, the second mapping relationship, or the third mapping relationship. Reference is made in detail to the description in method 300.

S450, the terminal device adjusts the number of times of repeated transmission L in S420 and the number of symbols for each PUSCH repeated transmission according to the first format of each slot determined in S410, and the terminal device determines the number of symbols for actually transmitting the uplink data channel N times.

Optionally, the terminal device adjusts the number of repeated transmissions L in S420 and the number of symbols of the PUSCH for each repeated transmission according to the first format of each slot and the Redundancy Version (RV) of the PUSCH for each repeated transmission determined in S410, and the terminal device determines the number of symbols of the PUSCH for each repeated transmission in the PUSCH for N times. For the transmission of configuration grant type1 and grant type 2, the RV may be determined from the repK-RV in the IE rrc-configurable uplink grant.

As an alternative manner of S450, the terminal device may further adjust the number of times of repeated transmission L in S420 and the number of symbols in each repeated transmission of the PUSCH according to the switching point of the uplink and the downlink, and the terminal device determines the number of symbols in each repeated transmission of the PUSCH in the N repeated transmissions of the PUSCH.

Alternatively, if S430 exists, in S430, the number of symbols of the uplink data channel repeatedly transmitted each time in the uplink data channel repeatedly transmitted M times may also be determined at the same time, so that it is not necessary to determine the number of symbols of the uplink data channel repeatedly transmitted N times in S450 again, that is, S450 does not exist, and the number of symbols of the uplink data channel N times before may be obtained from the number of symbols of the uplink data channel M times.

S460, determining the size TBS of the transmission block of the M times of repeated transmission uplink data channels according to the symbol number of the previous N times of repeated transmission uplink data channels.

Specifically, for the method for determining the TBS for the M times of repeated transmission of the uplink data channel in S450, reference is made to four methods in the method 300, and details are not described herein to avoid redundancy in the embodiments of the present application.

It should be noted that the flows shown in fig. 2 to fig. 4 are merely exemplary, and the sequence number of each step in the drawings is for clarity of description, but the sequence number of each step does not limit the order of execution in the method, for example, a smaller sequence number may be executed before or after a larger sequence number, and this is not limited in this embodiment of the present application. Optionally, each step is an optional step, and in different implementations, different steps may be adopted, or other steps may be executed but are not shown in the drawings, and this is not limited by the embodiment of the present application.

It is to be understood that the method and operation implemented by the terminal device in the foregoing method embodiments may also be implemented by a component (e.g., a chip or a circuit) applicable to the terminal device, and the method and operation implemented by the network device in the foregoing method embodiments may also be implemented by a component (e.g., a chip or a circuit) applicable to the network device.

The method for determining a TBS according to an embodiment of the present application is described in detail above with reference to fig. 1 to 4, and the apparatus for determining a TBS according to an embodiment of the present application is described in detail below with reference to fig. 5 and 6.

Fig. 5 shows a schematic block diagram of an apparatus 500 for determining a TBS according to the embodiment of the present application, where the apparatus 500 may correspond to a terminal device or a network device described in the foregoing method, and may also correspond to a chip or a component of the terminal device or the network device, and each module or unit in the apparatus 500 may be configured to execute each action or process performed by the terminal device in the foregoing method, and as shown in fig. 5, the apparatus 500 for determining a TBS may include a first processing unit 510 and a second processing unit 520.

A first processing unit 510, configured to determine N uplink data channels for repeated transmission, where the N uplink data channels for repeated transmission are the first N times of the M uplink data channels for repeated transmission, M is greater than N, and N is a positive integer greater than 1;

a second processing unit 520, configured to determine a transport block size TBS of the uplink data channel with M times of repeated transmission according to the number of symbols of the uplink data channel with N times of repeated transmission.

As an optional embodiment, the second processing unit 520 is specifically configured to:

determining the TBS of the M times of repeated transmission uplink data channels according to the total number of the symbols of the previous N times of repeated transmission uplink data channels; or alternatively

Determining the TBS of the uplink data channel repeatedly transmitted for M times according to the maximum symbol number in the symbol numbers of the uplink data channel repeatedly transmitted for the previous N times; or alternatively

Determining the TBS of the uplink data channel repeatedly transmitted for M times according to the minimum symbol number in the symbol numbers of the uplink data channel repeatedly transmitted for the previous N times; or

And determining the TBS of the M times of repeated transmission uplink data channels according to the average symbol number of the previous N times of repeated transmission uplink data channels.

As an optional embodiment, the first processing unit 510 is specifically configured to:

and determining the uplink data channel for the N repeated transmissions according to a mapping relationship, where the mapping relationship is used to indicate a corresponding relationship between the number of repeated transmissions M and the number of repeated transmissions N, or the mapping relationship is used to indicate a corresponding relationship between the number of repeated transmissions L and the number of repeated transmissions N, where L is a positive integer, obtained in the downlink control information DCI and/or in the high-level configuration parameter, or the mapping relationship is used to indicate a corresponding relationship between the redundancy version and the number of repeated transmissions N.

As an alternative embodiment, the apparatus 500 further comprises:

a transceiving unit 530, configured to receive the mapping relationship from the network device.

As an alternative embodiment, the first processing unit 510 or the second processing unit 520 is further configured to:

determining the number of symbols of each uplink data channel repeatedly transmitted in the uplink data channels repeatedly transmitted for the previous N times according to at least one of the following items:

a time unit format;

determining the repeated transmission times M for transmitting the uplink data channel according to at least one of the following items:

a time unit format;

and repeatedly transmitting the uplink data channel in L times of repeatedly transmitting the uplink data channel.

Optionally, the apparatus 500 may further include a storage unit, where the storage unit is configured to store codes or data, and the first processing unit 510 or the second processing unit 520 may read the codes or data in the storage unit to implement corresponding operations. Alternatively, the storage unit may be implemented by a memory. The transceiving unit 530 may also be referred to as a communication unit or a communication interface.

The first processing unit 510 and the second processing unit 520 in the above embodiments may be implemented by a processor or processor-related circuitry.

It should be understood that for the specific processes of the units in the apparatus 500 to execute the corresponding steps described above, reference is made to the description of the method embodiment in conjunction with fig. 3 to 4, and for brevity, no further description is provided here.

The apparatus 500 of each of the above schemes has a function of implementing corresponding steps executed by the terminal device or the network device in the above method; the functions can be realized by hardware or software, and the corresponding software can be executed by hardware. The hardware or software comprises one or more modules corresponding to the functions; for example, the sending unit may be replaced by a communication interface, the receiving unit may be replaced by a communication interface, and other units, such as the determining unit, may be replaced by a processor, to perform the transceiving operation and the related processing operation in each method embodiment, respectively. In an embodiment of the present application, a communication interface of an apparatus is used for the apparatus to communicate with other devices. For example, the communication interface may be a transmitter, a receiver, a transceiver, a circuit, a bus, a module, a pin, or other types of communication interfaces, and the embodiments of the present application are not limited thereto.

In particular implementations, the processor may be configured to perform, for example and without limitation, baseband-related processing, and the communication interface may be configured to perform, for example and without limitation, information exchange. The above devices may be respectively disposed on separate chips, or at least a part or all of the devices may be disposed on the same chip. For example, the processor may be further divided into an analog baseband processor and a digital baseband processor, wherein the analog baseband processor may be integrated with the communication interface on the same chip, and the digital baseband processor may be disposed on a separate chip. With the development of integrated circuit technology, more and more devices can be integrated on the same chip, for example, a digital baseband processor can be integrated on the same chip with various application processors (such as, but not limited to, a graphics processor, a multimedia processor, etc.). Such a chip may be referred to as a System On Chip (SOC). Whether each device is separately located on a different chip or integrated on one or more chips often depends on the specific needs of the product design. The embodiment of the present application does not limit the specific implementation form of the above device.

It is understood that, for the processor referred to in the foregoing embodiments, the functions referred to in any design of the foregoing embodiments of the present application can be implemented by a hardware platform having a processor and a communication interface executing program instructions, respectively, and based on this, as shown in fig. 6, the present application embodiment provides a schematic block diagram of an apparatus 600 for determining a TBS, where the apparatus 600 includes: a processor 610, a communication interface 620, and a memory 630. Wherein the processor 610, the communication interface 620 and the memory 630 are coupled to communicate with each other, the memory 630 is used for storing instructions, and the processor 610 is used for executing the instructions stored in the memory 630 to control the communication interface 620 to transmit signals and/or receive signals. The coupling in the embodiments of the present application is an indirect coupling or a communication connection between devices, units or modules, and may be an electrical, mechanical or other form for information interaction between the devices, units or modules.

The processor 610 is configured to determine N uplink data channels for repeated transmission, where the N uplink data channels for repeated transmission are the first N times of the M uplink data channels for repeated transmission, M is greater than N, and N is a positive integer greater than 1; the processor 610 is further configured to determine a transport block size TBS of the uplink data channel with M repeated transmissions according to the number of symbols of the uplink data channel with N previous repeated transmissions.

It should be understood that the apparatus in fig. 5 in this embodiment of the present application may be implemented by the apparatus 600 in fig. 6, and may be configured to perform various steps and/or flows corresponding to the terminal device or the network device in the foregoing method embodiments.

In one possible design, an exemplary embodiment of the present application may further provide a TBS determination system, which includes a network device and a terminal device. The terminal device is configured to perform the steps of the

aforementioned method

300 or 400, and the network device is configured to perform the steps of the aforementioned method 300.

It should be understood that the various design aspects described in this application may relate to methods, processes, operations or steps that can be implemented in a one-to-one correspondence manner through computer software, electronic hardware, or a combination of computer software and electronic hardware. Whether the functions are executed in a hardware or software manner depends on specific applications and design constraints of the technical scheme, for example, aspects such as software and hardware decoupling with good universality and low cost are considered, the functions can be realized in a manner of executing program instructions, and aspects such as system performance and reliability are considered, and special circuits can be adopted for realization. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

According to the method provided by the embodiment of the present application, the present application further provides a computer program product, which includes: computer program code which, when run on a computer, causes the computer to perform the method in the above-described embodiments. The various embodiments in this application may also be combined with each other.

According to the method provided by the embodiment of the present application, the present application also provides a computer readable medium, the computer readable medium stores program code, and when the program code runs on a computer, the computer is caused to execute the method in the above embodiment.

In the embodiment of the present application, it should be noted that the above method embodiments of the present application may be applied to a processor, or may be implemented by a processor. The processor may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The processor may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or any conventional processor or the like.

It will be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. There are many different types of RAM, such as Static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and direct bus RAM (DR RAM).

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

The appearances of the phrases "first," "second," and the like in this application are only for purposes of distinguishing between different items and the phrases "first," "second," and the like do not by themselves limit the actual order or function of the items so modified. Any embodiment or design described herein as "exemplary," e.g., "optionally" or "in certain implementations" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of these words is intended to present relevant concepts in a concrete fashion.

Various objects such as various messages/information/devices/network elements/systems/devices/operations/etc. that may appear in the present application are named, it is understood that these specific names do not constitute limitations on related objects, and the named names may vary with factors such as scenes, contexts, or usage habits, and the understanding of the technical meaning of the technical terms in the present application should be mainly determined from the functions and technical effects embodied/performed in the technical solutions.

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

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

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. In the embodiments of the present application, the embodiments may refer to each other, for example, methods and/or terms between the embodiments of the method may refer to each other, for example, functions and/or terms between the embodiments of the apparatus and the embodiments of the method may refer to each other, without logical contradiction.

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

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

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

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

Claims

1. A method for determining a transport block size, comprising:

determining N times of repeatedly transmitted uplink data channels, wherein the N times of repeatedly transmitted uplink data channels are the first N times of M times of repeatedly transmitted uplink data channels, M is greater than N, and N is a positive integer greater than 1;

and determining the size TBS of the transmission block of the M times of repeated transmission uplink data channels according to the number of the symbols of the previous N times of repeated transmission uplink data channels.

2. The method of claim 1, wherein said determining the TBS of the M retransmission uplink data channels according to the number of symbols of the previous N retransmission uplink data channels comprises:

determining the TBS of the M times of repeated transmission uplink data channels according to the total number of the symbols of the previous N times of repeated transmission uplink data channels; or

Determining the TBS of the uplink data channel repeatedly transmitted for M times according to the minimum symbol number in the symbol numbers of the uplink data channel repeatedly transmitted for the previous N times; or alternatively

3. The method according to claim 1 or 2, wherein the determining N times of repeatedly transmitting the uplink data channel comprises:

and determining the uplink data channel for repeated transmission for the N times according to a mapping relationship, where the mapping relationship is used to indicate a corresponding relationship between the number of times of repeated transmission M and the number of times of repeated transmission N, or the mapping relationship is used to indicate a corresponding relationship between the number of times of repeated transmission L and the number of times of repeated transmission N, where L is a positive integer, obtained in the downlink control information DCI and/or in the high-level configuration parameter, or the mapping relationship is used to indicate a corresponding relationship between the redundancy version and the number of times of repeated transmission N.

4. The method of claim 3, further comprising:

receiving the mapping relationship from a network device.

5. The method according to claim 1 or 2, characterized in that the method further comprises:

determining the number of symbols of each uplink data channel repeatedly transmitted in the previous N times of uplink data channels repeatedly transmitted according to at least one of the following items:

a time unit format;

the number L of repeated transmissions is obtained in the DCI and/or the high-level configuration parameters;

6. The method according to claim 1 or 2, characterized in that the method further comprises:

a time unit format;

7. An apparatus for determining a transport block size, comprising:

the first processing unit is used for determining N times of repeatedly transmitting uplink data channels, wherein the N times of repeatedly transmitting uplink data channels are the first N times of M times of repeatedly transmitting uplink data channels, M is greater than N, and N is a positive integer greater than 1;

and the second processing unit is used for determining the size TBS of the transmission block of the M times of repeated transmission uplink data channels according to the number of the symbols of the previous N times of repeated transmission uplink data channels.

8. The apparatus according to claim 7, wherein the second processing unit is specifically configured to:

Determining the TBS of the uplink data channel repeatedly transmitted for M times according to the maximum symbol number in the symbol numbers of the uplink data channel repeatedly transmitted for the previous N times; or

9. The apparatus according to claim 7 or 8, wherein the first processing unit is specifically configured to:

10. The apparatus of claim 9, further comprising:

and the transceiving unit is used for receiving the mapping relation from the network equipment.

11. The apparatus of claim 7 or 8, wherein the first processing unit or the second processing unit is further configured to:

determining the number of symbols of the uplink data channel repeatedly transmitted each time in the previous N times of uplink data channels repeatedly transmitted according to at least one of the following items:

a time unit format;

12. The apparatus of claim 7 or 8, wherein the first processing unit or the second processing unit is further configured to:

a time unit format;

13. A communication apparatus comprising a memory, a processor, wherein the memory stores a program for execution on the processor, wherein the processor implements the method of any one of claims 1 to 6 when executing the program.

14. A computer-readable storage medium, characterized in that it stores a computer program which, when executed, implements the method according to any one of claims 1 to 6.

15. A chip comprising a processor coupled to a memory for storing a computer program, the processor being configured to execute the computer program stored in the memory to cause the chip to perform the method of any of claims 1 to 6.