CN116828617A

CN116828617A - TBS determination method and device, user equipment and storage medium

Info

Publication number: CN116828617A
Application number: CN202210262368.XA
Authority: CN
Inventors: 杨聿铭; 纪子超; 彭淑燕
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2022-03-16
Filing date: 2022-03-16
Publication date: 2023-09-29

Abstract

The application discloses a TBS (tunnel boring system) determining method, a TBS determining device, user equipment and a storage medium, belonging to the technical field of communication, wherein the TBS determining method comprises the following steps: the UE determines TBS of PSSCH according to the target information; wherein the target information includes at least one of: the time unit of PSSCH or TBS, the number of resources of PSSCH or SL, the number of subcarriers over the frequency domain of PSSCH, the number of REs allocated to PSSCH, the number of resources occupied by SCI, the number of resources occupied by DMRS of PSSCH, the number of REs occupied by target reference signal of PSSCH.

Description

TBS determination method and device, user equipment and storage medium

Technical Field

The application belongs to the technical field of communication, and particularly relates to a TBS (tunnel boring system) determining method, device, user equipment and storage medium.

Background

The long term evolution (Long Term Evolution, LTE) side link (sidlink) has a dedicated frequency band, and because there is a great difference between the design of the LTE sidlink User Equipment (UE) and the design of the New air interface (NR) sidlink UE, the current NR sidlink UE cannot directly access the dedicated frequency band of the LTE sidlink for communication, so a scheme is required to be designed so that the NR sidlink UE can coexist with the LTE sidlink UE on the dedicated frequency band.

However, in the case of co-frequency coexistence, in order to backward-compatible LTE sip UEs and improve transmission reliability, the control signaling structure, demodulation reference signal (Demodulation Reference Signal, DMRS) pattern, etc. of the NR sip UEs may be redesigned or designed to reuse LTE sip, and initial transmission and retransmission of the UEs may fall in resource pools configured differently in consideration of diversity of resource pool configuration in co-frequency coexistence. If the original transport block size (Transport Block Size, TBS) calculation method is also used on the basis, the TBS calculation of the physical side link shared channel (Physical Sidelink Shared Channel, PSSCH) is not accurate, or the primary retransmission calculation is inconsistent, so that the demodulation of the PSSCH is affected.

Disclosure of Invention

The embodiment of the application provides a TBS (tunnel boring system) determining method, a TBS determining device, user equipment and a storage medium, which can solve the problem that demodulation of a PSSCH is affected due to inaccurate TBS calculation under the condition of co-channel coexistence.

In a first aspect, there is provided a method of determining a BS, the method comprising: the UE determines TBS of PSSCH according to the target information; wherein the target information includes at least one of: the number of PSSCH or TBS time units, PSSCH or Side Link (SL) resources, number of subcarriers over the PSSCH frequency domain, number of Resource Elements (REs) allocated to the PSSCH, number of resources occupied by side link control information (Sidelink Control Information, SCI), number of resources occupied by PSSCH demodulation reference signals (Demodulation Reference Signal, DMRS), number of REs occupied by PSSCH target reference signals.

In a second aspect, there is provided a TBS determining apparatus, including: and a determining module. The determining module is used for determining TBS of the PSSCH according to the target information; wherein the target information includes at least one of: the time unit of PSSCH or TBS, the number of resources of PSSCH or SL, the number of subcarriers over the frequency domain of PSSCH, the number of REs allocated to PSSCH, the number of resources occupied by SCI, the number of resources occupied by DMRS of PSSCH, the number of REs occupied by target reference signal of PSSCH.

In a third aspect, there is provided a UE comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, performs the steps of the method according to the first aspect.

In a fourth aspect, a UE is provided, including a processor and a communication interface, where the processor is configured to determine a TBS of a PSSCH according to target information; wherein the target information includes at least one of: the time unit of PSSCH or TBS, the number of resources of PSSCH or SL, the number of subcarriers over the frequency domain of PSSCH, the number of REs allocated to PSSCH, the number of resources occupied by SCI, the number of resources occupied by DMRS of PSSCH, the number of REs occupied by target reference signal of PSSCH.

In a fifth aspect, there is provided a readable storage medium having stored thereon a program or instructions which when executed by a processor realizes the steps of the method according to the first aspect.

In a sixth aspect, there is provided a chip comprising a processor and a communication interface coupled to the processor for running a program or instructions to implement the method of the first aspect.

In a seventh aspect, there is provided a computer program/program product stored in a storage medium, the computer program/program product being executed by at least one processor to implement the steps of the method of determining a TBS according to the first aspect.

In the embodiment of the application, the UE can determine the TBS of the PSSCH according to the target information, wherein the target information comprises at least one of the following: the time unit of PSSCH or TBS, the number of resources of PSSCH or SL, the number of subcarriers over the frequency domain of PSSCH, the number of REs allocated to PSSCH, the number of resources occupied by SCI, the number of resources occupied by DMRS of PSSCH, the number of REs occupied by target reference signal of PSSCH. Under the condition of co-frequency coexistence, the scheme considers that the NR Sidelink UE changes some basic designs for backward compatibility and improving transmission reliability, and gives out new TBS calculation rules, namely, the UE calculates TBS by combining PSSCH and/or related resource conditions of the TBS, and can obtain a TBS calculation result more accurately, so that demodulation of the PSSCH is facilitated, and transmission reliability is improved.

Drawings

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

fig. 2 is a schematic diagram of a method for determining a TBS according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a TBS determining apparatus according to an embodiment of the present application;

fig. 4 is a schematic hardware structure of a communication device according to an embodiment of the present application;

fig. 5 is a schematic diagram of a hardware structure of a UE according to an embodiment of the present application.

Detailed Description

The technical solutions of the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the application, fall within the scope of protection of the application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or otherwise described herein, and that the "first" and "second" distinguishing between objects generally are not limited in number to the extent that the first object may, for example, be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/" generally means a relationship in which the associated object is an "or" before and after.

It is noted that the techniques described in the embodiments of the present application are not limited to long term evolution (Long Term Evolution, LTE)/LTE implementationsThe LTE-Advanced, LTE-a system may also be used in other wireless communication systems, such as code division multiple access (Code Division Multiple Access, CDMA), time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA), single-carrier frequency division multiple access (Single-carrier Frequency Division Multiple Access, SC-FDMA), and other systems. The terms "system" and "network" in embodiments of the application are often used interchangeably, and the techniques described may be used for both the above-mentioned systems and radio technologies, as well as other systems and radio technologies. The following description describes a New air interface (NR) system for purposes of example and uses NR terminology in much of the description that follows, but these techniques are also applicable to applications other than NR system applications, such as generation 6 (6) ^th Generation, 6G) communication system.

Fig. 1 shows a block diagram of a wireless communication system to which an embodiment of the present application is applicable. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 may be a mobile phone, a tablet (Tablet Personal Computer), a Laptop (Laptop Computer) or a terminal-side Device called a notebook, a personal digital assistant (Personal Digital Assistant, PDA), a palm top, a netbook, an ultra-mobile personal Computer (ultra-mobile personal Computer, UMPC), a mobile internet appliance (Mobile Internet Device, MID), an augmented reality (augmented reality, AR)/Virtual Reality (VR) Device, a robot, a Wearable Device (weather Device), a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), a smart home (home Device with a wireless communication function, such as a refrigerator, a television, a washing machine, or a furniture), a game machine, a personal Computer (personal Computer, PC), a teller machine, or a self-service machine, and the Wearable Device includes: intelligent wrist-watch, intelligent bracelet, intelligent earphone, intelligent glasses, intelligent ornament (intelligent bracelet, intelligent ring, intelligent necklace, intelligent anklet, intelligent foot chain etc.), intelligent wrist strap, intelligent clothing etc.. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network-side device 12 may comprise an access network device or a core network device, wherein the access network device 12 may also be referred to as a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function or a radio access network element. Access network device 12 may include a base station, a WLAN access point, a WiFi node, or the like, which may be referred to as a node B, an evolved node B (eNB), an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a home node B, a home evolved node B, a transmission and reception point (Transmitting Receiving Point, TRP), or some other suitable terminology in the art, and the base station is not limited to a particular technical vocabulary so long as the same technical effect is achieved, and it should be noted that in the embodiment of the present application, only a base station in the NR system is described as an example, and the specific type of the base station is not limited.

The following explains some concepts and/or terms related to the method, the device, the user equipment and the storage medium for determining the TBS according to the embodiments of the present application.

1、Sidelink

The LTE system supports transmission of side links (Sidelink, or Sidelink, etc.), that is, data transmission between UEs is directly performed on a physical layer without a network device. LTE sip is broadcast based, and although available to support basic security class communications for internet of vehicles (Vehicle to Everything, V2X), is not applicable to other higher-level V2X services.

The 5G NR system will support more advanced sip transmission designs, such as unicast, multicast or multicast, etc., so that more comprehensive service types can be supported.

2、LTE PSCCH

PSCCH (herein referred to as SA), the composition of SA consists of the following indicated domains:

the PSCCH (i.e., SA) of LTE Sidelink and the PSSCH are transmitted in the same subframe, and the frequency domains of the SA and the PSSCH may be continuous or discontinuous, and they are divided into two schemes:

option1: the SA maps from the lowest frequency domain position in the lowest subchannel (sub-channel) of the resource selected for data transmission, occupying two physical resource blocks (Physical Resource Block, PRB);

Option2: the SA starts mapping from the frequency domain position in the SA resource pool (resource pool) corresponding to the lowest subshannel of the resources selected for data transmission, occupying two PRBs.

3、NR Sidelink 1 ^st SCI (SCI format 1-A in NR Sidelink)

1 ^st The composition of SCI consists of:

4、NR Sidelink 2 ^nd SCI

2 ^nd SCI has the following two forms (SCI format 2-a and SCI format 2-B):

5. SCI design

On the basis of the resource selection rule that NR UE sends control information SA to be compatible with LTE Sidelink, the reserved bit number of SA is limited, so that indicated content is limited, and therefore second control information needs to be sent and is borne on PSSCH. At this time, since the problem of the second control information having too many occupied bits no longer needs to be considered, the second control information may transmit all control information except the SA.

Alternatively, in a two-segment SCI design that reuses NR, third control information may be sent, the indication field of which may reuse NR 2 ^nd An indication field of SCI and is carried on PSSCH. The format and beta_offset indication of the third control information are indicated by the second control information。

6. PSFCH and DMRS locations

For example, LTE Sidelink DMRS has symbol positions of l=2, 5,8,11, and in NR Sidelink, the PSFCH channel occupies the last two symbols of the slot except Guard Period (GP), and the former symbol is a repetition of the latter symbol, and is used for automatic gain control (Automatic Gain Control, AGC) power control. In order to enable the NR UE to transmit both the PSFCH and the DMRS according to the pattern of the LTE DMRS, the LTE UE may also obtain accurate reference signal received power (Reference Signal Receiving Power, RSRP) by measuring the DMRS transmitted by the NR UE, and thus may change the first symbol of the PSFCH to transmit the DMRS. Thus, the UE can still perform AGC through the first symbol, and the DMRS pattern on the NR UE side can be backwards compatible with LTE.

The method for determining the TBS provided by the embodiment of the application is described in detail through some embodiments and application scenes thereof by combining the attached drawings.

At present, a dedicated frequency band is already divided for communication of LTE (Long term evolution) Sidelink, and the current NR Sidelink UE cannot directly access to the frequency band for communication because of a large difference between the designs of the LTE Sidelink UE and the NR Sidelink UE. Under the condition that the number of NR Sidelink UE is increased and the number of LTE Sidelink UE is decreased, the frequency band utilization rate divided for the LTE Sidelink UE is lower, so that methods are required to be designed so that the NR Sidelink UE can coexist with the LTE Sidelink UE on the frequency bands.

Therefore, in the context of dynamic co-frequency coexistence, for backward compatibility and improving transmission reliability, the NR sip UE may redesign or reuse the design of LTE sip, and if the original TBS calculation method is further used on this basis, the TBS calculation of the PSSCH may be no longer accurate, thereby affecting demodulation of the PSSCH. In addition, considering the diversity of resource pool configuration in co-frequency coexistence, the primary transmission and retransmission of the UE may fall in resource pools with different configurations, and if the original TBS calculation method is further used on this basis, the calculation of the TBS of the PSSCH is inconsistent under the primary transmission retransmission, thereby affecting the demodulation of the received data by the receiving end. Therefore, the design of a more appropriate TBS calculation rule in the co-frequency coexistence background is more beneficial to PSSCH demodulation, so that the transmission reliability is enhanced.

The scheme of the application provides a method for determining TBS under the coexistence of the same frequency, and when the UE calculates the TBS of PSSCH, the method is determined according to at least one of the following steps: the method comprises the steps of determining the number of PRBs allocated to PSSCH transmission according to whether the PSFCH and the DMRS are overlapped in symbol number and whether the frequency domain transmission positions of SA and PSSCH are adjacent, considering the transmission of control information SA by the number of REs occupied by control information, reconstructing NR SCI, and keeping TBS calculation consistent when the resource pool configuration of initial retransmission is different. In the context of co-frequency coexistence, it is considered that NR sidlink UEs change some basic designs for backward compatibility and to improve transmission reliability, so designing more appropriate TBS calculation rules on this basis may be more beneficial to demodulation of the PSSCH, thereby enhancing transmission reliability.

The embodiment of the application provides a method for determining TBS, and fig. 2 shows a flow chart of the method for determining TBS provided by the embodiment of the application. As shown in fig. 2, the method for determining a TBS according to the embodiment of the present application may include the following step 201.

Step 201, the UE determines the TBS of the PSSCH according to the target information. Wherein the target information includes at least one of: the time unit of PSSCH or TBS, the number of resources of PSSCH or SL, the number of subcarriers over the frequency domain of PSSCH, the number of REs allocated to PSSCH, the number of resources occupied by SCI, the number of resources occupied by DMRS of PSSCH, the number of REs occupied by target reference signal of PSSCH.

Optionally, in the embodiment of the present application, the UE may acquire the target information by: predefined, protocol-agreed, preconfigured, network-configured, or UE-autonomously decided.

It should be noted that, the TBS of the PSSCH according to the embodiment of the present application may also be described as a TBS carrying data on the PSSCH. The PSSCH according to the embodiment of the present application may refer to the entire shared channel, for example, when describing the PSSCH carrying the reference signal, or may refer to a portion of the shared channel that only indicates to carry data, for example, when describing the number of REs allocated to the PSSCH. The number of occupied resources according to the embodiment of the present application may also be described as the number of allocated resources.

The SL (i.e., side link) is the SL associated/corresponding to the PSSCH or TBS. The target reference signal may be another reference signal carried on the PSSCH other than the DMRS, and may also be referred to as an overhead. The number of REs allocated to the PSSCH may be understood as the number of REs capable of being used as PSSCH transmission in the allocated resources.

Optionally, in an embodiment of the present application, the target reference signal may include at least one of the following: phase tracking signal (Phase Track Reference Signal, PT-RS), channel state information reference signal (Channel State Information Reference Signal, CSI-RS), sounding reference signal (Sounding Reference Signal, SRS), cell reference signal (Cell Reference Signal, CRS).

Alternatively, in the embodiment of the present application, the time unit may be 1 subframe (subframe) or 1 slot (slot), or may also be a unit of frame, millisecond, or second, etc., which is not limited by the embodiment of the present application.

Optionally, in an embodiment of the present application, the number of resources may include at least one of: the number of REs, the number of symbols, the number of Resource Blocks (RBs).

Optionally, in an embodiment of the present application, the number of resources of the PSSCH or SL includes at least one of the following: the number of symbols allocated to the PSSCH in time unit, and the number of PRBs allocated to the PSSCH.

Optionally, in the embodiment of the present application, the UE may directly determine the number of symbols, the number of PRBs, and/or the number of REs without considering the time domain resources and the frequency domain resources, so as to obtain the number of resources (e.g., the number of REs) of the PSSCH or SL.

Alternatively, in the embodiment of the present application, the number of resources of the PSSCH or SL is the number of symbols allocated to the PSSCH. The number of resources of the PSSCH or SL is determined according to at least one of the following: the number of symbols for SL in time units, the first number, the number of symbols for DMRS, the number of symbols for PSFCH multiplexed with DMRS, protocol conventions/predefining/network pre-configuration/network configuration.

Wherein the first number is the number of symbols occupied by the PSFCH or the number of symbols of the PSFCH determined from the PSFCH overhead configuration/indication.

Optionally, in the embodiment of the present application, the number of symbols of SL in the time unit is agreed by a protocol, predefined, network preconfigured, network configured or UE configured.

Optionally, in the embodiment of the present application, the number of symbols of the DMRS is the number of symbols occupied by the DMRS, or the number of symbols of the DMRS determined according to DMRS configuration/indication. It should be noted that, when the NR reuses the LTE DMRS, the DMRS occupies the entire symbol, and the manner of calculating the number of symbols occupied by the DMRS may be changed.

The NR reuse LTE DMRS refers to a technique in which NR transmits DMRS according to rules for generating and transmitting LTE DMRS so that it can demodulate LTE DMRS in a dynamic co-channel coexistence background and so that an LTE terminal can correctly demodulate DMRS carried by the NR terminal.

It should be noted that, for the number of symbols multiplexed by the PSFCH and the DMRS, when the LTE DMRS is reused by the NR, the last DMRS symbol position on the PSSCH may overlap or be multiplexed with the first symbol position of the PSFCH in the NR standard, so that it is necessary to consider where to calculate the number of symbols multiplexed by the PSFCH and the DMRS, and prevent the repetition of the calculation.

Alternatively, in the embodiment of the present application, when the LTE UE communicates with the NR UE, the calculation of the TBS (for example, the calculation of the number of resources of the PSSCH or SL) may be determined in the manner of LTE.

Optionally, in an embodiment of the present application, the number of symbols occupied by the PSFCH is determined according to at least one of the following: the number of symbols indicated by the higher layer parameter and the first indication information. The first indication information is used for indicating that the number of symbols occupied by the PSFCH is determined according to a first preset mode.

Illustratively, the number of symbols occupied by the above PSFCH is indicated by a high layer parameter:

for example, the number of symbols occupied by psfch=1.5, if the higher layer parameter indicates that the PSFCH period is 1, or when the higher layer index is not 0, the PSFCH overhead indication field indicates '1'; at this time, in order to average the number of PSFCH symbols of the primary retransmission, the number of symbols occupied by the PSFCH may be calculated as 1.5.

As another example, if the PSFCH occupies symbol number=2, if the higher layer parameter indicates that the PSFCH period is 1, or when the higher layer index is not 0, the PSFCH overhead indication field indicates '1', at which point the symbol multiplexed with the DMRS is not calculated considering the PSFCH symbol number.

Optionally, in an embodiment of the present application, the first preset manner may be any one of the following: the method comprises the steps of determining the number of symbols occupied by the PSFCH according to a first preset number, and determining the number of symbols occupied by the PSFCH according to the indication of sixth indication information, wherein the sixth indication information is used for indicating whether to calculate symbols multiplexed with the DMRS when determining the number of symbols occupied by the PSFCH.

It will be appreciated that if the higher layer parameter indication is calculated in a first predetermined manner when calculating the number of symbols occupied by the PSFCH, the UE calculates the number of symbols occupied by the PSFCH in the first predetermined manner before receiving the higher layer parameter indication again.

Optionally, in an embodiment of the present application, the number of resources of the PSSCH or SL is the number of PRBs allocated to the PSSCH. The number of resources of the PSSCH or SL is determined according to at least one of the following: the number of sub-channels allocated to the PSSCH, the size of the sub-channel allocated to the PSSCH, the first information, and the second indication information.

The first information is used for determining whether the first control information is adjacent to the frequency domain resource position of the PSSCH; the second indication information is used to indicate the number of resources occupied by the first control information, which may or may not need to be calculated when determining the number of resources of the PSSCH or SL.

Optionally, in an embodiment of the present application, the number of sub-channels of the PSSCH is determined according to at least one of the following: a first indication field in the first control information, a start subchannel of the first control information, a second indication field of the second control information.

The first indication field is used for indicating a first frequency domain resource position and/or retransmission information, the first frequency domain resource position is a frequency domain resource position of initial transmission and retransmission, and the second indication field is used for indicating frequency domain resource allocation information.

The first control information refers to control information transmitted by NR according to LTE SA, and the second control information refers to first node SCI in NR sidelink.

It will be appreciated that the first indication field may be an indication field in the SA that indicates the "frequency domain resource location for initial transmission and retransmission (i.e., frequency resource location of the initial transmission and retransmission)" and/or the "retransmission information (i.e., retransmission index)". The second indication field may be 1 ^st An indication field of SCI, which indicates "frequency domain resource allocation information (i.e., frequency resource assignment)".

It should be noted that, in order to enable coexistence, the NR UE may additionally carry the control information SA so that the LTE UE may detect the content of the control information of the NR UE, so it is considered herein that the number of sub-channels of the PSSCH may be determined according to the indication content of the SA.

Alternatively, in the embodiment of the present application, the size of the sub-channel allocated to the PSSCH may be determined by a higher layer parameter.

Optionally, in the embodiment of the present application, the first information/second indication information is configured by protocol convention/predefined/network pre-configuration/network configuration/UE pre-configuration.

It should be noted that, the first information is used by the UE to determine whether the frequency domain transmission positions of the SA and the PSSCH are adjacent, for example, adjacent (i.e., a portion of the PSSCH and the SA are located in one sub-channel), that is, the lowest/highest PRB index of the PSSCH is the highest PRB index+1 or the lowest PRB index-1 of the SA.

In case the UE receives the higher layer parameter indication, i.e. the second indication information, with/without considering the first control information (SA) in determining the number of resources of the PSSCH or SL, the UE may calculate the number of resources of the PSSCH or SL, both with/without considering the first control information, as needed, before receiving the higher layer parameter indication again.

Optionally, in the embodiment of the present application, the number of PRBs allocated to the pssch=the first product (i.e. the product of the number of sub-channels allocated to the PSSCH and the size of the sub-channels allocated to the PSSCH) minus a preset value (e.g. 0, 1 or 2, etc.).

For example, the number of PRBs allocated to the pssch=the first product minus 2, whether the transmission of NR would fall in the resource pool allocated only to the NR UE or multiplexed (overlap) with the resource pool allocated to the LTE UE or partially overlapped, is calculated according to this case, to ensure that the TBS calculation of the initial retransmission is consistent in the case of different resource pool allocation, i.e. subtracting the two PRBs occupied by the SA according to the case when the SA is adjacent to the frequency domain transmission position of the PSSCH.

Also for example, in order to ensure that the TBS calculation of the primary retransmission is consistent in the case of different resource pool configurations, and the probability of the LTE UE needs to be considered to be smaller, for example, the frequency domain range of the resource pool configured with the LTE UE is smaller, in this case, in order to prevent that the PRB number allocated to the PSSCH is uniformly subtracted by 2, which results in a larger probability of smaller TBS calculation, a median value may be taken to calculate the PRB number allocated to the PSSCH.

Also exemplary, the number of PRBs allocated to the pssch=first product, and the protocol reservation/pre-definition/network pre-configuration/network configuration calculates the number of PRBs allocated to the PSSCH according to the frequency domain occupation situation without considering the SA, further reducing the probability of TBS calculation to be small.

It should be noted that, when there are multiple resource pool configurations in the Bandwidth Part (BWP), that is, the TB transmitted by the NR UE may be located in the resource pool configured with the LTE UE or may be located in the resource pool not configured with the LTE UE. At this time, since the configurations of different resource pools are different, if some designs of LTE are not reused by the UEs in the NR resource pools, the physical structures (physical structure) faced by the Transport Blocks (TBs) of the primary retransmission of the NR UEs are different, so that TBs calculation results are inconsistent. Thus, this problem can be solved by:

When calculating the number of PRBs occupied by the PSSCH, whether the transmission of NR falls in a resource pool configured only for NR UEs or is calculated with a resource pool overlap or resource pool partial overlap configured for LTE UEs, it may be calculated according to one of the following cases to ensure that the TBS calculation of the initial retransmission is consistent in the case of different resource pool configurations:

n _PRB =first product-2;

n _PRB =first product-1;

n _PRB =first product-0;

wherein n is _PRB Is the number of PRBs allocated to the PSSCH.

When calculating the number of REs occupied by the DMRS, considering that the number of REs occupied by the DMRS is more when the LTE DMRS design is reused, the number of the REs occupied by the DMRS in different modes from the NR DMRS can be adopted for averaging, and the following scheme is adopted:

when the NR high layer parameter indicates that the DMRS pattern list is {2}, that is, the configuration pattern of the DMRS is only one, and the number of symbols is 2, the number of REs occupied by the DMRS in 1 PRB per time unit is 24 or 30. Where 24 is obtained when the fourth DMRS symbol in the LTE structure is calculated as a PSFCH symbol in the process of calculating TBS, and is not calculated as a DMRS symbol, and thus is less than when all DMRS symbols are calculated. The following example gives two results based on this consideration as well;

when the NR higher-layer parameter indicates that the DMRS mode list is {3}/{2,4}/{2,3,4}, and the number of REs occupied by the DMRS in 1 PRB in a time unit is 27 or 33;

When the NR higher-layer parameter indicates that the DMRS mode list is {4}, the number of REs occupied by the DMRS in 1 PRB per time unit is 30 or 36.

It should be noted that, when the higher-layer parameter indication is calculated in a certain preset manner (for example, the first preset manner or the second preset manner), the UE may calculate in the preset manner before the UE receives the higher-layer parameter indication again.

Optionally, in an embodiment of the present application, the SCI may include at least one of the following: 1 ^st SCI、2 ^nd SCI, SA. In this context, SCI format1 in LTE Sidelink is written as SA, and SCI format1-A in NR Sidelink is written as 1 ^st SCI (first SCI), writing SCI format 2-A, SCI format 2-B and/or SCI format 2-C in NR Sidelink as 2 ^nd SCI (i.e., second segment SCI).

Optionally, in the embodiment of the present application, the number of resources (such as the number of REs, the number of symbols, and/or the number of RBs) occupied by the SCI is determined according to at least one of the following: protocol predefined/network pre-configured/network configured/UE configured, third indication information, fourth indication information, second number, third number, fourth number, fifth number.

Wherein the third indication information is used for indicating the number of resources occupied by the first control information or not when determining the number of resources occupied by the SCI; the fourth indication information is used for indicating that the number of resources occupied by the first control information is calculated according to a preset proportion when the number of resources occupied by the first control information is determined; the second number comprises the first number of resources, the number of resources occupied by the second control information and the number of resources occupied by the third control information; the third number comprises the first number of resources and the number of resources occupied by the second control information; the fourth number comprises the number of resources occupied by the second control information and the number of resources occupied by the third control information; the fifth number is the number of resources occupied by the second control information. The first resource number is the resource number occupied by the first control information or the resource number occupied by the first control information calculated according to a preset proportion.

The third control information refers to the second section SCI in the NR sidelink. The second section SCI here refers to control information carried on the PSSCH channel. I.e. if the NR UE reconstructs the SCI, all control information except the SA is carried on the PSSCH, also referred to herein as the second segment SCI for convenience of presentation.

It will be appreciated that, in the case where the UE receives the higher layer parameter indication (i.e., the third indication information, the number of resources (e.g., the number of REs) occupied by the first control information (SA) need/need not be considered in calculating the number of resources occupied by the SCI), the UE may calculate the number of resources occupied by the SCI, both with and without the first control information need/need to be considered, as needed, before the UE receives the higher layer parameter indication again.

In the case that the UE receives the higher layer parameter indication (i.e., the fourth indication information, calculated according to a preset ratio (e.g., X%) when calculating the number of resources occupied by the first control information), the UE may calculate the number of resources occupied by the first control information according to X% of the number of resources occupied by the first control information (e.g., the number of REs) before the UE receives the higher layer parameter indication again.

It can be appreciated that in one case, the number of resources occupied by the SCI is defined by: the number of resources occupied by the first control information or the number of resources occupied by the first control information calculated according to X percent is 1 ^st The number of resources occupied by SCI and 2 ^nd The number of resources occupied by SCI.

In another case, the number of resources occupied by the SCI is defined by: the number of resources occupied by the first control information or the number of resources occupied by the first control information calculated according to X percent is 1 ^st The number of resources occupied by SCI constitutes (considering the case of SCI reconfiguration, where there is only one segment of SCI outside the SA).

In another case, the number of resources occupied by the SCI is as follows: 1 ^st Number of resources occupied by SCI, 2 ^nd The number of resources occupied by SCI is composed (the case that the SA occupies the RE is considered when the SA is separated from the frequency domain transmission position of the PSSCH or the PRB number is calculated, and here the SA is not considered any more).

In another case, the number of resources occupied by the SCI is equal to 1 ^st The number of resources occupied by SCI.

Optionally, in an embodiment of the present application, the number of resources occupied by the third control information satisfies at least one of the following conditions:

the symbols that can be used to transmit the third control information do not include symbols that transmit DMRS and PSFCH;

the number of REs that can be used to transmit the third control information on the target symbol is determined by the number of subcarriers on the target symbol that the PSSCH transmission is scheduled to carry the first control information and/or the second control information.

In calculation 2 ^nd The number of resources occupied by SCI can be 2 ^nd The number of modulation symbols of SCI is obtained. 2 ^nd The number of modulation symbols of SCI can be used for transmission 2 in rate matching ^nd The number of symbols of SCI and the number of symbols can be used for transmission 2 ^nd The number of REs of SCI is determined.

It can be appreciated that when the NR transmits a DMRS in LTE DMRS format, the entire DMRS symbol cannot carry data, and at the same time, there is a PSFCH, so that the symbol for transmitting the DMRS and the PSFCH is not included when the number of symbols is calculated; at the same time, can be used for transmission 2 on the calculation symbol ^nd When the RE number of SCI is increased, SA and 1 are required to be excluded ^st RE occupied by SCI.

Optionally, in the embodiment of the present application, the number of resources (for example, the number of REs, the number of symbols, and/or the number of RBs) occupied by the DMRS is determined according to at least one of the following: the number of resources indicated by the higher layer parameter, the pattern of the DMRS, the pattern list of the DMRS indicated by the higher layer parameter, and fifth indication information. The fifth indication information is used for indicating that the number of resources occupied by the DMRS is determined according to a second preset mode when the number of resources occupied by the DMRS is determined.

Optionally, in the embodiment of the present application, when the mode (pattern) of the DMRS is the first mode, the number of REs occupied by the DMRS in 1 PRB per time unit is 48. Alternatively, when the pattern of the DMRS is the first pattern, the number of REs occupied by the DMRS within 1 PRB in a time unit is 36 (since the last DMRS symbol may overlap with the first symbol of the PSFCH when reusing the LTE DMRS, this overlapping symbol may not be considered in calculating the DMRS).

Optionally, in the embodiment of the present application, when the higher layer parameter indicates the mode list of the DMRS, the number of REs occupied by the DMRS in 1 PRB on the time unit is a preset value (considering that the initial retransmission resource pool configuration is different, resulting in different DMRS modes, and considering that the average value is used to indicate the number of REs of the DMRS).

It may be appreciated that, in the case of receiving the higher layer parameter indication (i.e., the fifth indication information, which is determined according to the second preset manner when determining the number of resources occupied by the DMRS), the UE may calculate the number of resources occupied by the DMRS according to the second preset manner before the UE receives the higher layer parameter indication again.

Optionally, in an embodiment of the present application, the second preset manner may be any one of the following: the method comprises the steps of determining the number of resources occupied by the DMRS according to a second preset number, and determining the number of resources occupied by the DMRS according to the indication of seventh indication information, wherein the seventh indication information is used for indicating whether to calculate a symbol multiplexed with PSFCH when determining the number of resources occupied by the DMRS.

Optionally, in an embodiment of the present application, the target information includes the number of REs allocated to the PSSCH. The number of REs allocated to the PSSCH on each PRB is determined by any one of the following:

the number of subcarriers on one PRB, the number of symbols of PSSCH or SL, the number of symbols occupied by PSFCH, the number of REs occupied by target reference signals of PSSCH and the number of REs occupied by DMRS;

The number of subcarriers on one PRB, the number of symbols of PSSCH or SL, the number of symbols occupied by PSFCH, the number of symbols multiplexed by PSFCH and DMRS, the number of REs occupied by target reference signal of PSSCH and the number of REs occupied by DMRS;

the number of subcarriers on one PRB, the number of symbols of PSSCH or SL, the number of symbols occupied by PSFCH, the number of symbols occupied by DMRS and the number of REs occupied by target reference signal of PSSCH;

the number of subcarriers on one PRB, the number of symbols of PSSCH or SL, the number of symbols occupied by PSFCH, the number of symbols occupied by DMRS, the number of symbols multiplexed by PSFCH and DMRS, and the number of REs occupied by target reference signal of PSSCH.

Illustratively, the number of REs allocated to the PSSCH on each PRB is any of the following:

(taking into account the symbols that the DMRS may overlap with the PSFCH when calculated, and complementing the number of repeatedly calculated symbols);

(the DMRS occupies the whole symbol when reusing the LTE DMRS, so the symbol in which the DMRS is located is directly subtracted when calculating the number of symbols, and is not calculated in terms of the number of REs);

wherein N' _RE For the number of REs allocated to the PSSCH on each PRB,for the number of subcarriers on one PRB,symbol number for PSSCH or SL, +.>For the number of symbols occupied by PSFCH, +. >The number of REs occupied for the target reference signal of PSSCH, < >>RE number occupied for DMRS, +.>The number of symbols multiplexed for PSFCH and DMRS, < >>Number of symbols occupied for DMRS.

Optionally, in an embodiment of the present application, the target information includes the number of REs allocated to the PSSCH. The total number of REs allocated to the PSSCH on a PRB is determined by: the number of REs allocated to the PSSCH, the number of PRBs allocated to the PSSCH, and the number of REs occupied by the SCI on each PRB.

Optionally, in the embodiment of the present application, the total number N of REs allocated to the PSSCH on the PRB _RE The method comprises the following steps:wherein N' _RE For the number of REs allocated to the PSSCH on each PRB,n _PRB for the number of PRBs allocated to PSSCH, +.>Number of REs occupied for SCI.

Illustratively, in mode one (i.e., TBS calculation rule 1), the UE, in determining the number of REs allocated to the PSSCH within a slot:

(1) Determining the number of REs allocated to the PSSCH within 1 PRB:wherein (1)> sl-LengthSymbols is the number of symbols allocated to PSSCH on the slot indicated by the higher layer, +.>

(2) Determining a total number of REs allocated to the PSSCH:wherein (1)>Is the number of REs occupied by SCI and SCI DMRS,>is any one of the following:

at this time, the NR Sidelink UE also transmits control information transmitted by the LTE Sidelink UE in addition to the design of reserving two SCIs, so that the LTE UE can identify the NR UE, and at this time, the control signaling SA and 1 to be transmitted is transmitted ^st SCI、2 ^nd SCI and RE number occupied by DMRS are calculated in control signalLet SCI and SCI DMRS occupy the RE number. Thus, in calculating n _PRB In the case of using SA, the PRB occupied by SA is also calculated as n _PRB An inner part;

at this time, the NR Sidelink UE redesigns two SCI designs except the control information SA sent by the LTE Sidelink UE, and only one SCI is sent;

at this time, the SA is not transmitted at the NR Sidelink UE, or when the SA is separated from the frequency domain transmission position of the PSSCH, or n is calculated _PRB When the conditions that the SA occupies the RE are considered, the conditions that the SA occupies the RE are not needed to be considered;

at this time, consider that the NR sidlink UE redesigns the two-segment SCI design, and only one segment SCI is transmitted.

Wherein, the liquid crystal display device comprises a liquid crystal display device,the number of REs occupied for the first control information (SA),>is 1 ^st RE number occupied by SCI,>is 2 ^nd Number of REs occupied by SCI.

Also illustratively, in mode two (i.e., TBS calculation rule 2), the UE, in determining the number of REs allocated to the PSSCH within the slot:

1. determining the number of REs allocated to the PSSCH within 1 PRB:

(2) Determining a total number of REs allocated to the PSSCH: the same method as in the first embodiment is described above.

The embodiment of the application provides a TBS determining method, UE can determine the TBS of PSSCH according to target information, and the target information comprises at least one of the following: the time unit of PSSCH or TBS, the number of resources of PSSCH or SL, the number of subcarriers over the frequency domain of PSSCH, the number of REs allocated to PSSCH, the number of resources occupied by SCI, the number of resources occupied by DMRS of PSSCH, the number of REs occupied by target reference signal of PSSCH. Under the condition of co-frequency coexistence, the scheme considers that the NR Sidelink UE changes some basic designs for backward compatibility and improving transmission reliability, and gives out new TBS calculation rules, namely, the UE calculates TBS by combining PSSCH and/or related resource conditions of the TBS, and can obtain a TBS calculation result more accurately, so that demodulation of the PSSCH is facilitated, and transmission reliability is improved.

It should be noted that, in the method for determining TBS provided in the embodiment of the present application, the execution body may be UE, or may be a device for determining TBS, or a control module used in the device for determining TBS to execute the method for determining TBS. In the embodiment of the present application, a method for determining a TBS performed by a UE is taken as an example, and a device for determining a TBS provided in the embodiment of the present application is described.

Fig. 3 shows a schematic diagram of a possible configuration of a TBS determining apparatus according to an embodiment of the present application, which is applied to a UE. As shown in fig. 3, the TBS determining apparatus 40 may include: a determination module 41.

Wherein, the determining module 41 is configured to determine a TBS of the PSSCH according to the target information; wherein the target information includes at least one of: the time unit of PSSCH or TBS, the number of resources of PSSCH or SL, the number of subcarriers over the frequency domain of PSSCH, the number of REs allocated to PSSCH, the number of resources occupied by SCI, the number of resources occupied by DMRS of PSSCH, the number of REs occupied by target reference signal of PSSCH.

The embodiment of the application provides a TBS determining device, under the condition of co-frequency coexistence, the scheme considers that NR Sidelink UE changes some basic designs for backward compatibility and transmission reliability improvement, and provides new TBS calculation rules, namely the TBS determining device calculates TBS by combining PSSCH and/or related resource conditions of TBS, and can obtain TBS calculation results more accurately, thereby being more beneficial to PSSCH demodulation and further enhancing transmission reliability.

In one possible implementation, the number of resources of the PSSCH or SL includes at least one of: the number of symbols allocated to the PSSCH in time unit, and the number of PRBs allocated to the PSSCH.

In one possible implementation, the number of resources of the PSSCH or SL is the number of symbols allocated to the PSSCH; the number of resources of the PSSCH or SL is determined according to at least one of: the number of symbols of SL in time unit, the first number, the number of symbols of DMRS, the number of symbols multiplexed by PSFCH and DMRS, protocol convention/predefining/network pre-configuring/network configuring; wherein the first number is the number of symbols occupied by the PSFCH or the number of symbols of the PSFCH determined from the PSFCH overhead configuration/indication.

In one possible implementation manner, the number of symbols occupied by the PSFCH is determined according to at least one of the following: the number of symbols indicated by the high-level parameters and the first indication information; the first indication information is used for indicating that the number of symbols occupied by the PSFCH is determined according to a first preset mode.

In one possible implementation, the number of resources of the PSSCH or SL is the number of PRBs allocated to the PSSCH; the number of resources of the PSSCH or SL is determined according to at least one of: the number of sub-channels allocated to the PSSCH, the size of the sub-channel allocated to the PSSCH, the first information, the second indication information; the first information is used for determining whether the first control information is adjacent to the frequency domain resource position of the PSSCH; the second indication information is used to indicate the number of resources occupied by the first control information, which may or may not need to be calculated when determining the number of resources of the PSSCH or SL.

In one possible implementation, the number of sub-channels of the PSSCH is determined according to at least one of: a first indication field in the first control information, a start sub-channel of the first control information, a second indication field of the second control information; the first indication field is used for indicating a first frequency domain resource position and retransmission information, the first frequency domain resource position is a frequency domain resource position of initial transmission and retransmission, and the second indication field is used for indicating frequency domain resource allocation information.

In one possible implementation, the number of resources occupied by the SCI is determined according to at least one of: protocol predefined/network pre-configured/network configured/user equipment UE configured, third indication information, fourth indication information, second number, third number, fourth number, fifth number; wherein the third indication information is used for indicating the number of resources occupied by the first control information or not when determining the number of resources occupied by the SCI; the fourth indication information is used for indicating that the number of resources occupied by the first control information is calculated according to a preset proportion when the number of resources occupied by the first control information is determined; the second number comprises the first number of resources, the number of resources occupied by the second control information and the number of resources occupied by the third control information; the third number comprises the first number of resources and the number of resources occupied by the second control information; the fourth number comprises the number of resources occupied by the second control information and the number of resources occupied by the third control information; the fifth number is the number of resources occupied by the second control information; the first resource number is the resource number occupied by the first control information or the resource number occupied by the first control information calculated according to a preset proportion.

In one possible implementation manner, the number of resources occupied by the third control information satisfies at least one of the following conditions: the symbols that can be used to transmit the third control information do not include symbols that transmit DMRS and PSFCH; the number of REs that can be used to transmit the third control information on the target symbol is determined by the number of subcarriers on the target symbol that the PSSCH transmission is scheduled to carry the first control information and/or the second control information.

In one possible implementation manner, the number of resources occupied by the DMRS is determined according to at least one of the following: the method comprises the steps of (1) the number of resources indicated by a high-level parameter, the mode of the DMRS, a mode list of the DMRS indicated by the high-level parameter and fifth indication information; the fifth indication information is used for indicating that the number of resources occupied by the DMRS is determined according to a second preset mode when the number of resources occupied by the DMRS is determined.

In one possible implementation, the target information includes the number of REs allocated to the PSSCH; the number of REs allocated to the PSSCH on each PRB is determined by any one of the following:

In one possible implementation, the target information includes the number of REs allocated to the PSSCH; the total number of REs allocated to the PSSCH on a PRB is determined by: the number of REs allocated to the PSSCH, the number of PRBs allocated to the PSSCH, and the number of REs occupied by the SCI on each PRB.

The device for determining the TBS in the embodiment of the present application may be a UE, for example, a UE with an operating system, or may be a component in the UE, for example, an integrated circuit or a chip. The UE may be a terminal or may be another device other than a terminal. By way of example, the UE may include, but is not limited to, the types of UE11 listed above, other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., and embodiments of the application are not specifically limited.

The TBS determining device provided by the embodiment of the present application can implement each process implemented by the UE in the above method embodiment, and achieve the same technical effects, so that repetition is avoided, and no detailed description is given here.

Optionally, as shown in fig. 4, the embodiment of the present application further provides a communication device 5000, which includes a processor 5001 and a memory 5002, where the memory 5002 stores a program or instructions that can be executed on the processor 5001, for example, when the communication device 5000 is a UE, the program or instructions implement each step of the method embodiment on the UE side when executed by the processor 5001, and the same technical effects can be achieved, so that repetition is avoided and no further description is given here.

The embodiment of the application also provides the UE, which comprises a processor and a communication interface, wherein the processor is used for determining the TBS of the PSSCH according to the target information; wherein the target information includes at least one of: the time unit of PSSCH or TBS, the number of resources of PSSCH or SL, the number of subcarriers over the frequency domain of PSSCH, the number of REs allocated to PSSCH, the number of resources occupied by SCI, the number of resources occupied by DMRS of PSSCH, the number of REs occupied by target reference signal of PSSCH. The UE embodiment corresponds to the UE-side method embodiment, and each implementation process and implementation manner of the method embodiment are applicable to the UE embodiment, and the same technical effects can be achieved. Specifically, fig. 5 is a schematic diagram of a hardware structure of a UE implementing an embodiment of the present application.

The UE700 includes, but is not limited to: at least some of the components of the radio frequency unit 701, the network module 702, the audio output unit 703, the input unit 704, the sensor 705, the display unit 706, the user input unit 707, the interface unit 708, the memory 709, and the processor 710.

Those skilled in the art will appreciate that the UE700 may further include a power source (e.g., a battery) for powering the various components, and that the power source may be logically coupled to the processor 710 via a power management system to perform functions such as managing charging, discharging, and power consumption via the power management system. The UE structure shown in fig. 5 does not constitute a limitation of the UE, and the UE may include more or less components than illustrated, or may combine certain components, or may be arranged in different components, which are not described in detail herein.

It should be appreciated that in embodiments of the present application, the input unit 704 may include a graphics processing unit (Graphics Processing Unit, GPU) 7041 and a microphone 7042, with the graphics processor 7041 processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The display unit 706 may include a display panel 7061, and the display panel 7061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 707 includes at least one of a touch panel 7071 and other input devices 7072. The touch panel 7071 is also referred to as a touch screen. The touch panel 7071 may include two parts, a touch detection device and a touch controller. Other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and so forth, which are not described in detail herein.

In the embodiment of the present application, after receiving downlink data from a network side device, the radio frequency unit 701 may transmit the downlink data to the processor 710 for processing; in addition, the radio frequency unit 701 may send uplink data to the network side device. Typically, the radio unit 701 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

The memory 709 may be used to store software programs or instructions and various data. The memory 709 may mainly include a first storage area storing programs or instructions and a second storage area storing data, wherein the first storage area may store an operating system, application programs or instructions (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. Further, the memory 709 may include volatile memory or nonvolatile memory, or the memory 709 may include both volatile and nonvolatile memory. The nonvolatile 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. The volatile memory may be random access memory (Random Access Memory, RAM), static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (ddr SDRAM), enhanced SDRAM (Enhanced SDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DRRAM). Memory 709 in embodiments of the application includes, but is not limited to, these and any other suitable types of memory.

Processor 710 may include one or more processing units; optionally, processor 710 integrates an application processor that primarily processes operations involving an operating system, user interface, application programs, and the like, and a modem processor that primarily processes wireless communication signals, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into the processor 710.

Wherein, the processor 710 is configured to determine a TBS of the PSSCH according to the target information; wherein the target information includes at least one of: the time unit of PSSCH or TBS, the number of resources of PSSCH or SL, the number of subcarriers over the frequency domain of PSSCH, the number of REs allocated to PSSCH, the number of resources occupied by SCI, the number of resources occupied by DMRS of PSSCH, the number of REs occupied by target reference signal of PSSCH.

The embodiment of the application provides a UE, under the condition of co-frequency coexistence, the scheme considers that the NR Sidelink UE changes some basic designs for backward compatibility and transmission reliability improvement, and gives out a new TBS calculation rule, namely, the UE calculates the TBS by combining PSSCH and/or related resource conditions of the TBS, and can obtain a TBS calculation result more accurately, so that demodulation of the PSSCH is facilitated, and the transmission reliability is enhanced.

The UE provided in the embodiment of the present application can implement each process implemented by the UE in the embodiment of the method and achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

The embodiment of the application also provides a readable storage medium, on which a program or an instruction is stored, which when executed by a processor, implements each process of the above method embodiment, and can achieve the same technical effects, and in order to avoid repetition, the description is omitted here.

Wherein the processor is a processor in the UE described in the above embodiment. The readable storage medium includes computer readable storage medium such as computer readable memory ROM, random access memory RAM, magnetic or optical disk, etc.

The embodiment of the application further provides a chip, which comprises a processor and a communication interface, wherein the communication interface is coupled with the processor, and the processor is used for running programs or instructions to realize the processes of the embodiment of the method, and can achieve the same technical effects, so that repetition is avoided, and the description is omitted here.

It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.

The embodiments of the present application further provide a computer program/program product stored in a storage medium, where the computer program/program product is executed by at least one processor to implement each process of the above method embodiments, and achieve the same technical effects, and are not repeated herein.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a computer software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present application.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.

Claims

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

the User Equipment (UE) determines TBS of a physical side link shared channel (PSSCH) according to the target information;

wherein the target information includes at least one of: the time unit of the PSSCH or TBS, the number of resources of the PSSCH or the side link SL, the number of subcarriers in the frequency domain of the PSSCH, the number of resource elements RE allocated to the PSSCH, the number of resources occupied by the side link control information SCI, the number of resources occupied by the demodulation reference signal DMRS of the PSSCH, and the number of REs occupied by the target reference signal of the PSSCH.

2. The method of claim 1, wherein the number of resources of the PSSCH or the SL comprises at least one of: the number of symbols allocated to the PSSCH in time unit, and the number of PRBs allocated to the PSSCH.

3. The method according to claim 1 or 2, characterized in that the number of resources of the PSSCH or the SL is the number of symbols allocated to the PSSCH;

the number of resources of the PSSCH or the SL is determined according to at least one of: the number of symbols of the SL, the first number, the number of symbols of the DMRS, the number of symbols of the physical sidelink feedback channel PSFCH multiplexed with the DMRS, protocol conventions/predefining/network pre-configuration/network configuration in time units;

Wherein the first number is the number of symbols occupied by a PSFCH or the number of symbols of the PSFCH determined from the PSFCH overhead configuration/indication.

4. A method according to claim 3, wherein the number of symbols occupied by the PSFCH is determined from at least one of: the number of symbols indicated by the high-level parameters and the first indication information;

the first indication information is used for indicating that the number of symbols occupied by the PSFCH is determined according to a first preset mode.

5. The method according to claim 1 or 2, characterized in that the number of resources of the PSSCH or the SL is the number of PRBs allocated to the PSSCH;

the number of resources of the PSSCH or the SL is determined according to at least one of: the number of sub-channels allocated to the PSSCH, the size of the sub-channel allocated to the PSSCH, the first information, the second indication information;

the first information is used for determining whether the first control information is adjacent to the frequency domain resource position of the PSSCH; the second indication information is used for indicating that the number of resources occupied by the first control information needs or does not need to be calculated when determining the number of resources of the PSSCH or the SL.

6. The method of claim 5, wherein the number of sub-channels of the PSSCH is determined according to at least one of: a first indication field in the first control information, a start sub-channel of the first control information, and a second indication field of the second control information;

7. The method of claim 1 wherein the number of resources occupied by the SCI is determined based on at least one of: protocol predefined/network pre-configured/network configured/the UE configuration, third indication information, fourth indication information, second number, third number, fourth number, fifth number;

wherein the third indication information is used for indicating the number of resources occupied by the first control information or not when determining the number of resources occupied by the SCI; the fourth indication information is used for indicating that the number of resources occupied by the first control information is calculated according to a preset proportion when the number of resources occupied by the first control information is determined; the second number comprises the first resource number, the resource number occupied by the second control information and the resource number occupied by the third control information; the third number comprises the first resource number and the resource number occupied by the second control information; the fourth number comprises the number of resources occupied by the second control information and the number of resources occupied by the third control information; the fifth number is the number of resources occupied by the second control information;

The first resource number is the resource number occupied by the first control information or the resource number occupied by the first control information calculated according to a preset proportion.

8. The method of claim 7, wherein the number of resources occupied by the third control information satisfies at least one of the following conditions:

symbols that can be used to transmit the third control information do not include symbols that transmit the DMRS and PSFCH;

the number of REs on a target symbol that can be used to transmit the third control information is determined by the number of subcarriers on the target symbol that schedule the PSSCH transmission, the number of subcarriers that carry the first control information and/or the second control information.

9. The method of claim 1, wherein the number of resources occupied by the DMRS is determined according to at least one of: the number of resources indicated by the high-level parameter, the mode of the DMRS, the mode list of the DMRS indicated by the high-level parameter and fifth indication information;

the fifth indication information is used for indicating that the number of resources occupied by the DMRS is determined according to a second preset mode when the number of resources occupied by the DMRS is determined.

10. The method of claim 1, wherein the target information comprises a number of REs allocated to the PSSCH;

The number of REs allocated to the PSSCH on each PRB is determined by any one of:

the number of subcarriers on one PRB, the number of symbols of the PSSCH or the SL, the number of symbols occupied by PSFCH, the number of REs occupied by a target reference signal of the PSSCH and the number of REs occupied by the DMRS;

the number of subcarriers on one PRB, the number of symbols of the PSSCH or the SL, the number of symbols occupied by PSFCH, the number of symbols multiplexed by the PSFCH and the DMRS, the number of REs occupied by a target reference signal of the PSSCH and the number of REs occupied by the DMRS;

the number of subcarriers on one PRB, the number of symbols of the PSSCH or the SL, the number of symbols occupied by PSFCH, the number of symbols occupied by the DMRS and the number of REs occupied by a target reference signal of the PSSCH;

the number of subcarriers on one PRB, the number of symbols of the PSSCH or the SL, the number of symbols occupied by the PSFCH, the number of symbols occupied by the DMRS, the number of symbols multiplexed by the PSFCH and the DMRS, and the number of REs occupied by a target reference signal of the PSSCH.

11. The method of claim 1, 2 or 10, wherein the target information includes a number of REs allocated to the PSSCH;

The total number of REs allocated to the PSSCH on a PRB is determined by: the number of REs allocated to the PSSCH, the number of PRBs allocated to the PSSCH, and the number of REs occupied by the SCI on each PRB.

12. A device for determining a transport block size TBS, said device comprising:

a determining module, configured to determine a TBS of a physical sidelink shared channel PSSCH according to the target information;

13. The apparatus of claim 12, wherein the number of resources of the PSSCH or the SL comprises at least one of: the number of symbols allocated to the PSSCH in time unit, and the number of PRBs allocated to the PSSCH.

14. The apparatus according to claim 12 or 13, wherein the number of resources of the PSSCH or the SL is the number of symbols allocated to the PSSCH;

15. The apparatus of claim 14, wherein the number of symbols occupied by the PSFCH is determined based on at least one of: the number of symbols indicated by the high-level parameters and the first indication information;

16. The apparatus according to claim 12 or 13, wherein the number of resources of the PSSCH or the SL is the number of PRBs allocated to the PSSCH;

17. The apparatus of claim 16, wherein the number of sub-channels of the PSSCH is determined according to at least one of: a first indication field in the first control information, a start sub-channel of the first control information, and a second indication field of the second control information;

18. The apparatus of claim 12 wherein the number of resources occupied by the SCI is determined based on at least one of: protocol predefined/network pre-configured/network configured/user equipment UE configured, third indication information, fourth indication information, second number, third number, fourth number, fifth number;

19. The apparatus of claim 18, wherein the third control information occupies a number of resources that satisfy at least one of:

20. The apparatus of claim 12, wherein the number of resources occupied by the DMRS is determined according to at least one of: the number of resources indicated by the high-level parameter, the mode of the DMRS, the mode list of the DMRS indicated by the high-level parameter and fifth indication information;

21. The apparatus of claim 12, wherein the target information comprises a number of REs allocated to the PSSCH;

22. The apparatus of claim 12, 13 or 21, wherein the target information comprises a number of REs allocated to the PSSCH;

23. A user equipment, UE, characterized by comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor realizes the steps of the method of determining a transport block size, TBS, according to any of claims 1 to 11.

24. A readable storage medium, characterized in that the readable storage medium has stored thereon a program or instructions which, when executed by a processor, implement the steps of the method of determining a transport block size TBS according to any of claims 1 to 11.