CN113497692A - TBS determination method and related equipment - Google Patents

TBS determination method and related equipment Download PDF

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CN113497692A
CN113497692A CN202010266504.3A CN202010266504A CN113497692A CN 113497692 A CN113497692 A CN 113497692A CN 202010266504 A CN202010266504 A CN 202010266504A CN 113497692 A CN113497692 A CN 113497692A
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resource overhead
overhead
reference resource
dmrs
parameter
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CN113497692B (en
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彭淑燕
纪子超
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Vivo Mobile Communication Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path

Abstract

The invention provides a method for determining TBS and related equipment, wherein the method comprises the following steps: determining a first reference resource overhead; and determining a first Transport Block Size (TBS) according to the first reference resource overhead, wherein the first reference resource overhead comprises the reference resource overhead of second-level Sidelink Control Information (SCI) and/or the reference resource overhead of a channel state information reference signal (CSI-RS). According to the method for determining the TBS, provided by the invention, the terminal can determine the first reference resource overhead for determining the TBS, so that the TBS of initial transmission and retransmission can be ensured to be the same, the terminal can combine data, and the reliability of data transmission of the terminal is further improved.

Description

TBS determination method and related equipment
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a method for determining a TBS and a related device.
Background
In a wireless communication system, a terminal may directly perform data transmission with other terminals through a sidelink (also referred to as a sidelink, a side link, or the like), without passing through a network side device (such as a base station or the like). For example, in the car networking system, the intelligent vehicle-mounted device of the vehicle can perform data transmission with a terminal used by a roadside pedestrian or the intelligent vehicle-mounted device of another vehicle through a side link, and the like.
In the process of data transmission between the terminal and the receiving end through the sidelink, for example, data is transmitted on the sidelink supporting Hybrid Automatic Repeat reQuest (HARQ), if the initial transmission of data fails (i.e., initial transmission), the terminal may retransmit the data of the same transmission block to the receiving end at least once (i.e., retransmission), and the retransmitted information may be the same as or different from the initially transmitted information. However, the Transport Block Size (TBS) of the terminal during initial transmission and retransmission of data may be inconsistent, so that the initial transmission and the retransmission of data cannot be combined, which results in data transmission failure, and further reduces the reliability of data transmission by the terminal through the sidelink.
Disclosure of Invention
The embodiment of the invention provides a method for determining TBS and related equipment, which are used for solving the problem of low reliability of data transmission through a side link by a terminal at present.
In order to solve the technical problem, the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a method for determining a TBS, where the method is applied to a terminal and includes:
determining a first reference resource overhead;
determining a first transport block size, TBS, according to the first reference resource overhead;
the first reference resource overhead comprises reference resource overhead of second-level sidelink control information SCI and/or reference resource overhead of channel state information reference signal CSI-RS.
In a second aspect, an embodiment of the present invention further provides a terminal, including:
a first determining module to determine a first reference resource overhead;
a second determining module, configured to determine a first TBS according to the first reference resource overhead;
wherein the first reference resource overhead comprises reference resource overhead of the second-level SCI and/or reference resource overhead of the CSI-RS.
In a third aspect, an embodiment of the present invention further provides a terminal, including: a memory, a processor and a computer program stored on said memory and executable on said processor, said computer program, when executed by said processor, implementing the steps in the method for determining a TBS according to the first aspect.
In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when executed by a processor, the computer program implements the steps in the method for determining a TBS according to the first aspect.
In the embodiment of the invention, a first reference resource overhead is determined; determining a first Transport Block Size (TBS) according to the first Reference resource overhead, wherein the first Reference resource overhead includes Reference resource overhead of second-level Sidelink Control Information (SCI) and/or Reference resource overhead of Channel State Information Reference Signal (CSI-RS). In this way, the terminal can determine the first reference resource overhead for determining the TBS, so as to ensure that the TBSs for the initial transmission and the retransmission are the same, so that the terminal can combine the data, and further improve the reliability of data transmission of the terminal.
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Fig. 1 is a schematic structural diagram of a network system provided in an embodiment of the present invention;
fig. 2 is a flowchart illustrating a method for determining a TBS according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a terminal according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a hardware structure of a terminal according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "comprises," "comprising," or any other variation thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the use of "and/or" in the specification and claims means that at least one of the connected objects, such as a and/or B, means that three cases, a alone, B alone, and both a and B, exist.
In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
Embodiments of the present invention are described below with reference to the accompanying drawings. The embodiment provided by the invention can be applied to a wireless communication system. The wireless communication system may be a 5G system, or an Evolved Long Term Evolution (lte) system, or a subsequent Evolved communication system.
Fig. 1 is a block diagram of a network system according to an embodiment of the present invention, as shown in fig. 1, including a first terminal 11, a second terminal 12, and a network side device 13, where the first terminal 11 and the second terminal 12 may be mobile communication devices, for example: the Mobile terminal may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a Wearable Device (Wearable Device), or the like, or may be an intelligent vehicle-mounted Device of a vehicle, a Road Side Unit (RSU), an infrastructure, or the like. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present invention.
For example, in the case where the first terminal 11 is an intelligent vehicle-mounted device of a vehicle, the intelligent vehicle-mounted device of the vehicle may directly perform data transmission with the second terminal 12, and the second terminal 12 may be an intelligent vehicle-mounted device of another vehicle, a roadside unit, an infrastructure, or the like.
In addition, the network side device 13 may be a 5G network side device (e.g., a gNB or a 5G NR NB), or may be a 4G network side device (e.g., an eNB), or may be a 3G network side device (e.g., an NB), or a network side device in a subsequent evolved communication system, and so on, it should be noted that a specific type of the network side device 13 is not limited in this embodiment of the present invention.
Referring to fig. 2, fig. 2 is a flowchart illustrating a method for determining a TBS according to the present embodiment, which is applied to a terminal, and as shown in fig. 2, the method for determining a TBS includes the following steps:
step 201, determining a first reference resource overhead;
step 202, determining a first Transport Block Size (TBS) according to the first reference resource overhead;
the first Reference resource overhead includes Reference resource overhead of second-level Sidelink Control Information (SCI) and/or Reference resource overhead of Channel State Information Reference Signal (CSI-RS).
It should be noted that, because the terminal transmits data on the Sidelink (Sidelink) supporting Hybrid Automatic Repeat reQuest (HARQ) during data transmission, it needs to ensure that the TBSs determined during initial transmission and retransmission are the same, and the receiving end (e.g. other terminals, etc.) can combine the initial transmission data and the retransmission data when receiving the initial transmission data and the retransmission data, so as to obtain gain, thereby implementing normal transmission of data.
Here, the terminal may determine the first reference resource overhead for the determination of the TBS, so that the TBSs for the initial transmission and the retransmission may be ensured to be the same, so that the terminal may perform data combination, and further improve the reliability of data transmission of the terminal.
In addition, during the data transmission process of the terminal through the sidelink, the TBS is determined according to the number of available resources, and the number of available resources is calculated by subtracting the resource overhead from the total number of resources, where the resource overhead includes at least one of the resource overhead of the SCI and the resource overhead of the CSI-RS, so that the first reference resource overhead includes at least one of the reference resource overhead of the SCI and the reference resource overhead of the CSI-RS.
Of course, the resource overhead may also include: at least one of a resource overhead of Automatic Gain Control (AGC), a resource overhead of Guard Period (GP), a resource overhead of Physical Sidelink Feedback Channel (PSFCH), a resource overhead of Demodulation Reference Signal (DMRS), a resource overhead of Physical Sidelink Shared Channel (PSCCH), and a resource overhead of Phase Tracking Reference Signal (PTRS), etc. is not limited herein.
In this embodiment, the determining the first reference resource overhead may be that the terminal obtains the first reference resource overhead according to a preset rule, where the preset rule may be a protocol definition, a network side configuration, or a terminal pre-configuration.
In the process of data transmission through the Sidelink, the Sidelink supports two-stage SCI configuration, that is, a Physical Sidelink Control Channel (PSCCH) carries a first-stage SCI, a Physical Sidelink Shared Channel (PSCCH) carries a second-stage SCI, and Resource Elements (REs), that is, Resource cost occupied by the second-stage SCI, may be determined according to the TBS and the beta value, that is, when the first reference Resource cost includes reference Resource cost of the second-stage SCI, the reference Resource cost of the second-stage SCI may be determined according to the first beta value and the reference TBS.
Specifically, the reference resource overhead of the second-level SCI is determined according to the first beta value and the reference TBS, and may be calculated according to the following formula (1):
Figure BDA0002441436640000051
here, (O)SCI2+LSCI2) Indicating the size of the second level SCI;
Figure BDA0002441436640000052
represents the first beta value;
Figure BDA0002441436640000053
indicating the number of available resources, and the number of available resources may be determined according to a resource overhead of a Demodulation Reference Signal (DMRS);
Figure BDA0002441436640000054
represents the above reference TBS;
α represents a value configured on the network side.
In addition, the above description is given
Figure BDA0002441436640000055
And the above
Figure BDA0002441436640000056
The resource overhead of the corresponding DMRS may be different.
In addition, in the sidelink, the first-level SCI and the second-level SCI correspond to different SCI formats (formats), respectively, that is, the SCIs in different SCI formats in the sidelink may be defined by a protocol as the first-level SCI and the second-level SCI, respectively; alternatively, the SCIs defining the different SCI formats in the sidelink may be SCI format 0-1 (i.e., the first-level SCI), and SCI format 0-2 or SCI format 0-2-x (i.e., the second-level SCI), respectively.
In some embodiments, the first beta value may include at least one of:
beta values indicated in the first-level SCI;
determining a beta value according to a first parameter and a first mapping relation, wherein the first mapping relation is the mapping relation between the parameter and the beta value;
a protocol predefined value;
a value configured by a Radio Resource Control (RRC) or a media access Control unit MAC CE, or a value indicated by downlink Control information DCI;
a value associated with a Modulation and Coding Scheme (MCS).
The first beta value may be a beta value indicated in the first-level SCI, that is, the terminal calculates the reference resource overhead of the second-level SCI according to an actual beta value, so that the calculated reference resource overhead of the second-level SCI is more reasonable.
In the above embodiment, the first parameter may include a format of the second-level SCI, a fixed code point in the first-level SCI, or a transmission type of the second-level SCI, and so on; the first mapping relationship may be a mapping relationship between a parameter defined or configured by a protocol (network side configuration or terminal pre-configuration) and a beta value.
The first beta value may be a beta value determined according to a first parameter and a first mapping relationship, for example, the first beta value may be a protocol convention or a mapping relationship between a transmission type 1 of the second-level SCI (for example, the transmission type 1 of the second-level SCI is used for scheduling unicast (unicast) or multicast type group _ p _ cast 2) and the beta value 1 exists, and if the first parameter includes the transmission type 1 of the second-level SCI, the first beta value is the beta value 1, and so on.
Alternatively, the first beta value may be a protocol-defined value; or, it may also be a value configured by RRC or MAC CE or a value indicated by DCI.
It should be noted that, in the case that the first beta value is a value configured by RRC or MAC CE or a value indicated by DCI, the first beta value may be a value configured in a Resource Pool design mode (Resource Pool) per Resource Pool; and when the first beta value is a value indicated by the DCI, the first beta values indicated by the DCI when scheduling transmission of the same Transport Block (TB) are the same.
In addition, the first beta value may also be a MCS-associated value, and specifically, since the second-stage SCI may employ Quadrature Phase Shift Keying (QPSK) coding, and the transmitted data may be coded according to MCS indication, the modulation order Q corresponding to the MCS used in consideration of the TBS of the data may be codedmThe modulation order 2 used by the second level SCI may be different, which may have an effect on the reference resource overhead of the second level SCI, i.e., the first beta value may be the modulation order Q corresponding to the MCSmAnd (4) correlating. For example, the first beta value employed to determine the reference resource overhead for the second level SCI is a beta value (which may be a protocol defined value, a value in the first level SCI, a value for RRC or MAC CE configuration, or a value for DCI indication, etc.) versus one-half QmProduct of (i.e., beta (Q))m2), etc.
In some embodiments, the reference TBS may be determined according to a second parameter, wherein the second parameter comprises at least one of:
modulation order Qm；
Code rate R;
number of reference symbols N of PSSCHsymb；
Frequency domain resource size N indicated by first-level SCIPRB；
Number of subcarriers N in Physical Resource Block (PRB)SCE.g. NSCIs 12;
modulation and coding scheme MCS.
It should be noted that the reference symbol of the psch may be a symbol defined by a protocol for calculating the TBS.
In addition, in the case that the reference TBS is determined according to the number of reference symbols of the psch, the resource overhead of the PSFCH may be subtracted from all slots in the data transmission process, or the resource overhead of the PSFCH may not be considered in all slots.
In this embodiment, the reference TBS is determined according to the second parameter, and may be calculated according to a calculation formula defined or configured by a protocol.
Specifically, the reference TBS is: the modulation order QmThe code rate R and the reference symbol number N of the PSSCHsymbNumber of subcarriers N in each PRBSCAnd the frequency domain resource size NPRBThe above reference TBS is calculated according to the following formula (2).
TBS＝Qm·R·Nsymb·NPRB·NSC (2)
Alternatively, the reference TBS is: the code rate R and the reference symbol number N of the PSSCHsymbNumber of subcarriers N in each PRBSCAnd the frequency domain resource size NPRBThe integer multiple of the product of (a), specifically, the integer multiple may be two times, that is, the reference TBS is calculated by the following formula (3).
TBS＝(Qm·R·Nsymb·NPRB)/(Qm/2)·NSC
＝2·R·Nsymb·NPRB·NSC (3)
It should be noted that, as can be seen from the above formula (1), the reference resource of the second-level SCI is further associated with the number of available resources, which is the number of available resources in the formula (1)
Figure BDA0002441436640000081
And
Figure BDA0002441436640000082
at least one of
Figure BDA0002441436640000083
In some embodiments, a reference resource overhead of the second-level SCI may be determined according to the first beta value, the reference TBS, and a number of available resources, wherein the number of available resources is determined according to a reference resource overhead of the DMRS.
Here, the reference resource overhead of the second-level SCI is determined according to the beta value, the reference TBS, and the number of available resources, so that the determined reference resource overhead of the second-level SCI is more appropriate, and the reliability of data transmission through the side link is further improved.
It should be noted that the reference resource overhead of the DMRS may be resource overhead defined by a protocol for calculating the TBS; in addition, the reference resource overhead of the DMRS may be resource overhead acquired according to a protocol definition or a configuration manner.
In some embodiments, the reference resource overhead of the DMRS is determined according to at least one of:
a protocol-predefined number of symbols;
the number of symbols of the RRC configuration;
a predefined rule;
the number of reference symbols of the DMRS is obtained according to the pattern of the DMRS, and the pattern of the DMRS is indicated by the first-level SCI or PSCCH or RRC.
Here, the terminal may determine the reference resource overhead of the DMRS in any one of the above manners, so that the manner of determining the reference resource of the DMRS is flexible.
In this embodiment, the reference resource overhead of the DMRS may be determined according to the number of symbols predefined by the protocol; or, the number of symbols may be determined according to RRC configuration, where the number of symbols may be configured by the network side or preconfigured by the terminal in each resource pool.
In addition, the DMRS may be determined according to a predefined rule, and in particular, in the case that the reference resource overhead of the DMRS is determined according to the predefined rule, the reference resource overhead of the DMRS may include: reference resource overhead of a corresponding DMRS is calculated under the condition that a physical sidelink feedback channel PSFCH exists in each time slot in a resource pool; or, reference resource overhead of the corresponding DMRS is not present in each time slot in the resource pool, so that the occurrence of reference resource overhead values of different DMRSs for initial transmission and retransmission caused by the PSFCH can be avoided.
Or, the reference resource overhead of the DMRS corresponding to the number of PSFCH symbols referred to may also be defined or configured (e.g., configured by a network side or preconfigured by a terminal) by a protocol, and specifically, in a case that the reference resource overhead of the DMRS is determined according to a predefined rule, the reference resource overhead of the DMRS may be: and reference resource overhead of the corresponding DMRS under the condition that the last N reference symbol numbers in the resources can not be used for the DMRS, wherein N-1 is the PSFCH overhead of the reference.
It should be noted that the last symbol in the above resources is a symbol for protection, which may not be used as an overhead in the resource overhead of the PSFCH.
Of course, the reference resource overhead of the DMRS may also be determined according to the number of reference symbols of the DMRS, where the number of reference symbols of the DMRS may be obtained by the first-level SCI indication, PSCCH indication, or RRC-configured DMRS pattern.
It should be noted that the pattern of the DMRS of the first-level SCI indication, PSCCH indication, or RRC configuration may be a mapping rule defined or configured by a protocol (e.g., configured by a network side or preconfigured by a terminal). For example, if the first-level SCI indicates a DMRS with 4 symbols, when calculating the reference resource overhead of the second-level SCI, the reference resource overhead of the DMRS is 3 symbols, and so on.
In addition, due to the above
Figure BDA0002441436640000091
That is, the number of resources available for psch transmission is defined as the number of resources available for psch transmission, and if the resource overheads of DMRSs for initial transmission and retransmission are inconsistent, the number of resources used for psch transmission for calculation is inconsistent, which results in inconsistent reference resource overheads for calculating the second-level SCI, and further results in different TBSs obtained by initial transmission and retransmission calculation. Therefore, the initial transmission and the retransmission calculation can be realized by setting the same reference resource overhead of the DMRS used in the initial transmission and the retransmission calculationThe TBS calculated for the transmission and retransmission is the same.
In some embodiments, the reference resource overhead of the second-level SCI may be associated with MCS, for example, Q corresponding to MCS may be added in the above formula (1)mThe impact on the calculation of reference resource overhead for the second level SCI. Of course, the reference resource overhead of the second-level SCI may not be associated with the MCS, and is not limited herein.
In this embodiment, besides that the first reference resource overhead is the reference resource overhead of the second-level SCI determined according to the beta value and the reference TBS, the first reference resource overhead may also be the reference resource overhead of the second-level SCI and the reference resource overhead of the CSI-RS determined according to other manners.
In some embodiments, the first reference resource overhead is determined according to a third parameter and a second mapping relationship, where the second mapping relationship is a mapping relationship between the parameter and the resource overhead.
Specifically, the reference resource overhead of the second-level SCI may be determined according to the third parameter and the second mapping relationship; or, the reference resource overhead of the CSI-RS may be determined according to the third parameter and the second mapping relationship; or, the reference resource overhead of the second-stage SCI and the reference resource overhead of the CSI-RS may be determined according to the third parameter and the second mapping relationship.
It should be noted that, in the case that the first reference resource overhead includes the reference resource overhead of the second-level SCI and the reference resource overhead of the CSI-RS, the reference resource of the second-level SCI may be determined according to the beta value and the reference TBS, or according to the beta value, the reference TBS and the number of available resources, and the reference resource overhead of the CSI-RS is determined according to a third parameter and a second mapping relationship; or, the reference resource overhead of the second-stage SCI and the reference resource overhead of the CSI-RS may be determined according to the third parameter and the second mapping relationship.
The third parameter may be any parameter that affects a reference resource overhead of the second-level SCI or a reference resource overhead of the CSI-RS, and specifically, the third parameter may include at least one of a format of the second-level SCI, a fixed code point in the first-level SCI, and a transmission type of the second-level SCI.
In addition, the second mapping relationship may be a mapping relationship between a parameter defined or configured by a protocol (e.g., network side configuration or terminal pre-configuration) and a resource overhead.
For example: the protocol may define or configure the second mapping relationship to include at least one of:
if the format of the second-level SCI is 0-2-1, or the fixed code point in the first-level SCI is 00, or the transmission type of the second-level SCI is used for scheduling a multicast type (groupcast type)1, the mapped resource overhead is N1 REs, and the resource overhead is the reference resource overhead of the second-level SCI;
if the format of the second-level SCI is 0-2-2, or the fixed code point in the first-level SCI is 01, or the transmission type of the second-level SCI is used for scheduling unicast (unicast) or groupcast type2, the mapped resource overhead is N2 REs, and the resource overhead includes reference resource overhead of the second-level SCI, of course, the resource overhead may also include reference resource overhead of CSI-RS;
if the format of the second-level SCI is 0-2-3, or the fixed code point in the first-level SCI is 10, or the transmission type of the second-level SCI is used for scheduling broadcast (broadcast), the mapped resource overhead is N3REs, and the resource overhead is the reference resource overhead of the second-level SCI;
here, the values of N1, N2, and N3 may be the same or different.
In this embodiment, the second mapping relationship may be a mapping relationship between the parameter and the resource overhead of the CSI-RS, that is, the reference resource overhead of the CSI-RS may be determined according to the third parameter and the second mapping relationship.
Specifically, in a case that the third parameter is used to indicate a first transmission mode, the reference resource overhead includes reference resource overhead of CSI-RS, where the first transmission mode includes any one of:
unicast；
unicast and groupcast type 2;
unicast, groupcast type2, and broadcast.
Here, in a case where the third parameter indicates the first transmission mode, the reference resource overhead of the CSI-RS may be determined by the third parameter and the second mapping relationship.
In this embodiment, the second mapping relationship may include: and mapping relation between the third parameter and reference resource overhead of the CSI-RS, wherein the reference resource overhead of the CSI-RS is first overhead.
For example, when the format of the second-stage SCI is used to schedule a uni-ack transmission, the overhead of the CSI-RS is Ncsi; otherwise, the overhead of the CSI-RS is 0; or when the format of the second-stage SCI is used for scheduling unicast transmission, calculating the overhead of the CSI-RS, wherein the overhead of the CSI-RS is Ncsi; otherwise, the overhead of the CSI-RS is not calculated.
Alternatively, the second mapping relationship may include: under the condition that the third parameter includes a resource parameter of a first resource, if the resource parameter of the first resource satisfies a preset condition, the reference resource overhead of the CSI-RS is a first overhead, where the first resource includes: indicating or reserved PSSCH resources or resources for transmitting the CSI-RS.
It should be noted that the resource parameter of the first resource may be any parameter associated with reference resource overhead of the CSI-RS, and the preset condition may be a protocol definition or a configuration condition, and the reference resource overhead of the CSI-RS is determined based on the resource parameter of the first resource and the preset condition.
In some embodiments, the resource parameter is a bandwidth size or a sequence length; the preset conditions include: the bandwidth size or the sequence length is greater than or equal to a preset threshold.
For example, the second mapping relationship may be: under the condition that the bandwidth size of the resource for the CSI-RS is larger than or equal to a preset threshold value, the reference resource overhead of the CSI-RS is Ncsi; otherwise, the overhead of the CSI-RS is not calculated.
In addition, the first overhead may be a resource overhead defined or configured by a protocol, and specifically, the first overhead may include any one of:
a protocol predefined reference value;
a network preconfigured reference value;
overhead for configuration of a CSI-RS;
an average of overheads of configuration of the multiple CSI-RSs;
wherein the configuration of the one CSI-RS and/or the configuration of the plurality of CSI-RSs are predefined by a protocol or preconfigured by a network.
In this embodiment, the first TBS determined according to the first reference resource overhead may be a reference TBS, or may be an actually used TBS, which is not limited herein.
To facilitate understanding of the method for determining the TBS, a practical application of the method for determining the TBS is illustrated herein, specifically as follows:
example 1
The protocol predefines the format of the second-level SCI, the relationship (i.e., the second mapping relationship) between the fixed code point in the first-level SCI or the transmission type of the second-level SCI and the reference resource overhead value REs, and the corresponding overhead values, as follows:
if the above parameter (i.e., the third parameter) indicates that the second-level SCI can be used to schedule groupcast type 1, the resource overhead is defined as N1 REs.
If the above parameters indicate that the second-level SCI can be used to schedule unicast or groupcast type2, its resource overhead is defined as N2 REs.
If the above parameters indicate that the second level SCI can be used to schedule broadcast, the resource overhead is defined as N3 REs.
If the sending end (i.e. the terminal) schedules a unique data packet for transmission, the sending end obtains the reference resource overhead of the second-level SCI as N2 REs according to the defined rule.
The transmitting end or the receiving end subtracts N2 from the resource of the pscch in one slot to calculate the available resource, thereby further calculating the actual TBS.
Of course, further, the terminal may calculate the resource overhead of the actual second-level SCI according to the actual TBS and the beta value indicated by the first-level SCI, etc.
Example two
The protocol predefines a relationship between a format of the second-stage SCI and a reference resource overhead value REs of the second-stage SCI, a relationship between a format of the second-stage SCI and a reference resource overhead value REs of the CSI-RS, and corresponding overhead values, which are specifically as follows:
if the format of the second-level SCI indicates that the second-level SCI can be used for scheduling groupcast type 1, the resource overhead of the second-level SCI is defined as N1 REs, and the resource overhead of the CSI-RS is 0;
if the format of the second-level SCI indicates that the second-level SCI can be used for scheduling unicasts, the resource overhead of the second-level SCI is defined as N2 REs, and the resource overhead of the CSI-RS is defined as Ncsi REs;
if the format of the second-level SCI indicates that the second-level SCI can be used for scheduling broadcast, the resource overhead of the second-level SCI is defined as N3REs, and the resource overhead of the CSI-RS is 0;
if the format of the second-level SCI indicates that the second-level SCI can be used for scheduling groupcast type2, the resource overhead of the second-level SCI is defined as N4 REs, and the resource overhead of the CSI-RS is 0.
If the sending end (namely the terminal) schedules a unique data packet for transmission, the sending end obtains the reference resource overhead of the second-stage SCI as N2 REs according to a defined rule, and obtains the reference resource overhead of the CSI-RS as Ncsi REs.
Then the transmitting end or the receiving end subtracts N2 and Ncsi from the resource of the pscch in one slot to calculate the available resource, thereby further calculating the TBS of the actual transmission.
Example three
The protocol is predefined, and the reference resource overhead of the second-level SCI is calculated according to the beta value and the reference TBS.
Wherein the beta value is the value indicated in the first stage SCI, and the reference TBS is based on formula Qm·R·Nsymb·NPRB·NSC(i.e., the above equation (2)) is calculated to obtain the phaseThe relevant parameters are defined as follows:
Qmand R is obtained according to the MCS indicated in the first-level SCI;
Nsymbdetermining the cost of the PSFCH according to the assumed cost of the PSFCH, namely subtracting the cost of the reference PSFCH from the symbol number of the PSSCH;
NPRBis the size of the frequency domain resource indicated in the first level SCI;
NSCfor the number of subcarriers in each physical resource block PRB, e.g. NSCIs 12.
And then, acquiring the number of resources (namely the number of available resources) available to the second-level SCI according to the number of the reference DMRS resources (namely the reference resource overhead of the DMRS). Wherein the number of reference DMRS resources is obtained according to an RRC pre-configured value (i.e., the number of RRC-configured symbols).
The reference overhead M1 of the second-level SCI is calculated by substituting the following formula according to the reference TBS obtained above, the defined beta, and the number of resources available for the second-level SCI.
Figure BDA0002441436640000141
When the transmitting end (i.e. the terminal) schedules a data packet for transmission, the transmitting end terminal obtains the reference overhead of the second-level SCI according to the defined rule as M1 REs (i.e. the reference resource overhead of the second-level SCI).
The transmitting end or the receiving end subtracts M1 from the resource of the pscch in one slot to calculate an available resource, thereby further calculating the TBS of the actual transmission.
Of course, the terminal may further calculate the resource overhead of the actual second-level SCI according to the actual TBS and the beta value indicated by the SCI.
Referring to fig. 3, fig. 3 is a terminal according to an embodiment of the present invention, and as shown in fig. 3, a terminal 300 includes:
a first determining module 301, configured to determine a first reference resource overhead;
a second determining module 302, configured to determine a first TBS according to the first reference resource overhead;
wherein the first reference resource overhead comprises reference resource overhead of the second-level SCI and/or reference resource overhead of the CSI-RS.
Optionally, the first reference resource overhead includes a reference resource overhead of the second-level SCI, and the reference resource overhead of the second-level SCI is determined according to the first beta value and the reference TBS.
Optionally, the first beta value includes at least one of:
beta values indicated in the first-level SCI;
determining a beta value according to a first parameter and a first mapping relation, wherein the first mapping relation is the mapping relation between the parameter and the beta value;
a protocol predefined value;
a value configured by a radio resource control RRC or a media access control (MAC CE) control unit, or a value indicated by Downlink Control Information (DCI);
a value associated with a modulation and coding scheme, MCS.
Optionally, the reference TBS is determined according to a second parameter, where the second parameter includes at least one of:
modulation order Qm；
Code rate R;
number of reference symbols N of physical side link shared channel PSSCHsymb；
Frequency domain resource size N indicated by first-level SCIPRB；
Number of subcarriers N in physical resource Block PRBSC；
Modulation and coding scheme MCS.
Optionally, the reference TBS is: the product of the modulation order, the code rate, the number of reference symbols of the PSSCH, the number of subcarriers in the PRB, and the size of the frequency domain resource; alternatively, the first and second electrodes may be,
the reference TBS is: the code rate, the number of reference symbols of the PSSCH, the number of subcarriers in the PRB, and an integer multiple of the product of the frequency domain resource size.
Optionally, the reference resource overhead of the second-level SCI is determined according to the first beta value, the reference TBS, and the number of available resources, where the number of available resources is determined according to the reference resource overhead of the DMRS.
Optionally, the reference resource overhead of the DMRS is determined according to at least one of the following:
a protocol-predefined number of symbols;
the number of symbols of the RRC configuration;
a predefined rule;
the number of reference symbols of the DMRS is obtained according to the pattern of the DMRS, and the pattern of the DMRS is indicated by the first-level SCI or PSCCH or RRC.
Optionally, in a case that the reference resource overhead of the DMRS is determined according to a predefined rule, the reference resource overhead of the DMRS includes:
reference resource overhead of a corresponding DMRS is calculated under the condition that a physical sidelink feedback channel PSFCH exists in each time slot in a resource pool; alternatively, the first and second electrodes may be,
reference resource overhead for a corresponding DMRS in the absence of a PSFCH in each slot in the resource pool.
Optionally, under the condition that the reference resource overhead of the DMRS is determined according to a predefined rule, the reference resource overhead of the DMRS is:
and reference resource overhead of the corresponding DMRS under the condition that the last N reference symbol numbers in the resources can not be used for the DMRS, wherein N-1 is the PSFCH overhead of the reference.
Optionally, the reference resource overhead of the second-level SCI is associated with an MCS or a modulation order Qm.
Optionally, the first reference resource overhead is determined according to a third parameter and a second mapping relationship, where the second mapping relationship is a mapping relationship between a parameter and a resource overhead.
Optionally, the third parameter includes at least one of a format of the second-level SCI, a fixed code point in the first-level SCI, and a transmission type of the second-level SCI.
Optionally, in a case that the third parameter is used to indicate a first transmission mode, the reference resource overhead includes reference resource overhead of CSI-RS, where the first transmission mode includes any one of:
unicasting the unicast;
unicast and multicast type groupcast type 2;
unicast, groupcast type2, and broadcast.
Optionally, the second mapping relationship includes:
mapping relation between the third parameter and reference resource overhead of the CSI-RS, wherein the reference resource overhead of the CSI-RS is first overhead; or
Under the condition that the third parameter includes a resource parameter of a first resource, if the resource parameter of the first resource satisfies a preset condition, the reference resource overhead of the CSI-RS is a first overhead, where the first resource includes: indicating or reserved PSSCH resources or resources for transmitting the CSI-RS.
Optionally, the resource parameter is a bandwidth size or a sequence length; the preset conditions include: the bandwidth size or the sequence length is greater than or equal to a preset threshold.
Optionally, the first overhead includes any one of:
a protocol predefined reference value;
a network preconfigured reference value;
overhead for configuration of a CSI-RS;
an average of overheads of configuration of the multiple CSI-RSs;
wherein the configuration of the one CSI-RS and/or the configuration of the plurality of CSI-RSs are predefined by a protocol or preconfigured by a network.
It should be noted that, in the embodiment of the present invention, the terminal or 300 may be a terminal in an implementation manner in the method embodiment shown in fig. 2, and any implementation manner of the terminal in the method embodiment may be implemented by the terminal 300 in the embodiment of the present invention, and the same beneficial effects are achieved, and in order to avoid repetition, details are not described here again.
Fig. 4 is a schematic diagram of a hardware structure of a terminal for implementing various embodiments of the present invention, where the terminal 400 includes, but is not limited to: radio frequency unit 401, network module 402, audio output unit 403, input unit 404, sensor 405, display unit 406, user input unit 407, interface unit 408, memory 409, processor 410, and power supply 411. Those skilled in the art will appreciate that the terminal configuration shown in fig. 4 is not intended to be limiting, and that the terminal may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
Wherein, the processor 410 is configured to:
determining a first reference resource overhead;
determining a first TBS according to the first reference resource overhead;
the first reference resource overhead comprises reference resource overhead of second-level sidelink control information SCI and/or reference resource overhead of channel state information reference signal CSI-RS.
Optionally, the first reference resource overhead includes a reference resource overhead of the second-level SCI, and the reference resource overhead of the second-level SCI is determined according to the first beta value and the reference TBS.
Optionally, the first beta value includes at least one of:
beta values indicated in the first-level SCI;
determining a beta value according to a first parameter and a first mapping relation, wherein the first mapping relation is the mapping relation between the parameter and the beta value;
a protocol predefined value;
a value configured by a radio resource control RRC or a media access control (MAC CE) control unit, or a value indicated by Downlink Control Information (DCI);
a value associated with a modulation and coding scheme, MCS.
Optionally, the reference TBS is determined according to a second parameter, where the second parameter includes at least one of:
modulation order Qm；
Code rate R;
number of reference symbols N of physical side link shared channel PSSCHsymb；
Frequency domain resource size N indicated by first-level SCIPRB；
Number of subcarriers N in physical resource Block PRBSC；
Modulation and coding scheme MCS.
Optionally, the reference TBS is: the product of the modulation order, the code rate, the number of reference symbols of the PSSCH, the number of subcarriers in the PRB, and the size of the frequency domain resource; alternatively, the first and second electrodes may be,
the reference TBS is: the code rate, the number of reference symbols of the PSSCH, the number of subcarriers in the PRB, and an integer multiple of the product of the frequency domain resource size.
Optionally, the reference resource overhead of the second-level SCI is determined according to the first beta value, the reference TBS, and the number of available resources, where the number of available resources is determined according to the reference resource overhead of the DMRS.
Optionally, the reference resource overhead of the DMRS is determined according to at least one of the following:
a protocol-predefined number of symbols;
the number of symbols of the RRC configuration;
a predefined rule;
the number of reference symbols of the DMRS is obtained according to the pattern of the DMRS, and the pattern of the DMRS is indicated by the first-level SCI or PSCCH or RRC.
Optionally, in a case that the reference resource overhead of the DMRS is determined according to a predefined rule, the reference resource overhead of the DMRS includes:
reference resource overhead of a corresponding DMRS is calculated under the condition that a physical sidelink feedback channel PSFCH exists in each time slot in a resource pool; alternatively, the first and second electrodes may be,
reference resource overhead for a corresponding DMRS in the absence of a PSFCH in each slot in the resource pool.
Optionally, under the condition that the reference resource overhead of the DMRS is determined according to a predefined rule, the reference resource overhead of the DMRS is:
and reference resource overhead of the corresponding DMRS under the condition that the last N reference symbol numbers in the resources can not be used for the DMRS, wherein N-1 is the PSFCH overhead of the reference.
Optionally, the reference resource overhead of the second-level SCI is associated with an MCS or a modulation order Qm.
Optionally, the first reference resource overhead is determined according to a third parameter and a second mapping relationship, where the second mapping relationship is a mapping relationship between a parameter and a resource overhead.
Optionally, the third parameter includes at least one of a format of the second-level SCI, a fixed code point in the first-level SCI, and a transmission type of the second-level SCI.
Optionally, in a case that the third parameter is used to indicate a first transmission mode, the reference resource overhead includes reference resource overhead of CSI-RS, where the first transmission mode includes any one of:
unicasting the unicast;
unicast and multicast type groupcast type 2;
unicast, groupcast type2, and broadcast.
Optionally, the second mapping relationship includes:
mapping relation between the third parameter and reference resource overhead of the CSI-RS, wherein the reference resource overhead of the CSI-RS is first overhead; or
Under the condition that the third parameter includes a resource parameter of a first resource, if the resource parameter of the first resource satisfies a preset condition, the reference resource overhead of the CSI-RS is a first overhead, where the first resource includes: indicating or reserved PSSCH resources or resources for transmitting the CSI-RS.
Optionally, the resource parameter is a bandwidth size or a sequence length; the preset conditions include: the bandwidth size or the sequence length is greater than or equal to a preset threshold.
Optionally, the first overhead includes any one of:
a protocol predefined reference value;
a network preconfigured reference value;
overhead for configuration of a CSI-RS;
an average of overheads of configuration of the multiple CSI-RSs;
wherein the configuration of the one CSI-RS and/or the configuration of the plurality of CSI-RSs are predefined by a protocol or preconfigured by a network.
It should be understood that, in the embodiment of the present invention, the radio frequency unit 401 may be used for receiving and sending signals during a message sending and receiving process or a call process, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 410; in addition, the uplink data is transmitted to the base station. Typically, radio unit 401 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. Further, the radio unit 401 can also communicate with a network and other devices through a wireless communication system.
The terminal provides wireless broadband internet access to the user through the network module 402, such as helping the user send and receive e-mails, browse web pages, and access streaming media.
The audio output unit 403 may convert audio data received by the radio frequency unit 401 or the network module 402 or stored in the memory 409 into an audio signal and output as sound. Also, the audio output unit 403 may also provide audio output related to a specific function performed by the terminal 400 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 403 includes a speaker, a buzzer, a receiver, and the like.
The input unit 404 is used to receive audio or video signals. The input Unit 404 may include a Graphics Processing Unit (GPU) 4041 and a microphone 4042, and the Graphics processor 4041 processes image data of a still picture or video obtained by an image capturing apparatus (such as a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 406. The image frames processed by the graphic processor 4041 may be stored in the memory 409 (or other storage medium) or transmitted via the radio frequency unit 401 or the network module 402. The microphone 4042 may receive sound, and may be capable of processing such sound into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 401 in case of the phone call mode.
The terminal 400 also includes at least one sensor 405, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that adjusts the brightness of the display panel 4061 according to the brightness of ambient light, and a proximity sensor that turns off the display panel 4061 and the backlight when the terminal 400 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the terminal posture (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensors 405 may also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., which will not be described in detail herein.
The display unit 406 is used to display information input by the user or information provided to the user. The Display unit 406 may include a Display panel 4061, and the Display panel 4061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.
The user input unit 407 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function indications of the terminal. Specifically, the user input unit 407 includes a touch panel 4071 and other input devices 4072. Touch panel 4071, also referred to as a touch screen, may collect touch operations by a user on or near it (e.g., operations by a user on or near touch panel 4071 using a finger, a stylus, or any suitable object or attachment). The touch panel 4071 may include two portions of a touch detection device and a touch indicator. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch indicator; the touch indicator receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 410, receives a command from the processor 410, and executes the command. In addition, the touch panel 4071 can be implemented by using various types such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 4071, the user input unit 407 may include other input devices 4072. Specifically, the other input devices 4072 may include, but are not limited to, a physical keyboard, function keys (such as a volume indication key, a switch key, etc.), a track ball, a mouse, and a joystick, which are not described herein again.
Further, the touch panel 4071 can be overlaid on the display panel 4071, and when the touch panel 4071 detects a touch operation thereon or nearby, the touch operation is transmitted to the processor 410 to determine the type of the touch event, and then the processor 410 provides a corresponding visual output on the display panel 4061 according to the type of the touch event. Although in fig. 4, the touch panel 4071 and the display panel 4061 are two independent components to implement the input and output functions of the terminal, in some embodiments, the touch panel 4071 and the display panel 4061 may be integrated to implement the input and output functions of the terminal, which is not limited herein.
The interface unit 408 is an interface for connecting an external device to the terminal 400. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 408 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the terminal 400 or may be used to transmit data between the terminal 400 and an external device.
The memory 409 may be used to store software programs as well as various data. The memory 409 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 409 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 410 is an instruction center of the terminal, connects various parts of the entire terminal using various interfaces and lines, and performs various functions of the terminal and processes data by operating or executing software programs and modules stored in the memory 409 and calling data stored in the memory 409, thereby performing overall monitoring of the terminal. Processor 410 may include one or more processing units; preferably, the processor 410 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 410.
The terminal 400 may further include a power supply 411 (e.g., a battery) for supplying power to various components, and preferably, the power supply 411 may be logically connected to the processor 410 through a power management system, so as to implement functions of managing charging, discharging, and power consumption through the power management system.
In addition, the terminal 400 includes some functional modules that are not shown, and are not described in detail herein.
Preferably, an embodiment of the present invention further provides a terminal, including a processor 410, a memory 409, and a computer program stored in the memory 409 and capable of being executed on the processor 410, where the computer program, when executed by the processor 410, implements each process of the above-mentioned method for determining a TBS, and can achieve the same technical effect, and in order to avoid repetition, the details are not described here again.
It should be noted that, in this embodiment, the terminal 400 may be a terminal in any implementation manner in the method embodiment of the present invention, and any implementation manner of the terminal in the method embodiment of the present invention may be implemented by the terminal 400 in this embodiment, so as to achieve the same beneficial effects, and details are not described here.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements the above processes corresponding to the first network function, the second network function, and the terminal or the base station node, and can achieve the same technical effects, and details are not repeated here to avoid repetition. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
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 an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention 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 invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (34)

1. A method for determining TBS is applied to a terminal, and the method comprises the following steps:
determining a first reference resource overhead;
determining a first transport block size, TBS, according to the first reference resource overhead;
the first reference resource overhead comprises reference resource overhead of second-level sidelink control information SCI and/or reference resource overhead of channel state information reference signal CSI-RS.
2. The method of claim 1 wherein the reference resource overhead of the second level SCI is determined based on the first beta value and a reference TBS.
3. The method of claim 2, wherein the first beta value comprises at least one of:
beta values indicated in the first-level SCI;
determining a beta value according to a first parameter and a first mapping relation, wherein the first mapping relation is the mapping relation between the parameter and the beta value;
a protocol predefined value;
a value configured by a radio resource control RRC or a media access control (MAC CE) control unit, or a value indicated by Downlink Control Information (DCI);
a value associated with a modulation and coding scheme, MCS.
4. The method of claim 2, wherein the reference TBS is determined according to a second parameter, wherein the second parameter comprises at least one of:
modulation order Qm；
Code rate R;
number of reference symbols N of physical side link shared channel PSSCHsymb；
Frequency domain resource size N indicated by first-level SCIPRB；
Number of subcarriers N in physical resource Block PRBSC；
Modulation and coding scheme MCS.
5. The method of claim 4, wherein the reference TBS is: the product of the modulation order, the code rate, the number of reference symbols of the PSSCH, the number of subcarriers in the PRB, and the size of the frequency domain resource; alternatively, the first and second electrodes may be,
the reference TBS is: the code rate, the number of reference symbols of the PSSCH, the number of subcarriers in the PRB, and an integer multiple of the product of the frequency domain resource size.
6. The method of claim 2, wherein a reference resource overhead of the second-level SCI is determined according to the first beta value, a reference TBS, and a number of available resources, wherein the number of available resources is determined according to a reference resource overhead of the DMRS.
7. The method of claim 6, wherein the reference resource overhead for the DMRS is determined based on at least one of:
a protocol-predefined number of symbols;
the number of symbols of the RRC configuration;
a predefined rule;
the number of reference symbols of the DMRS is obtained according to the pattern of the DMRS, and the pattern of the DMRS is indicated by the first-level SCI or PSCCH or RRC.
8. The method of claim 7, wherein, in the case that the reference resource overhead for the DMRS is determined according to a predefined rule, the reference resource overhead for the DMRS comprises:
reference resource overhead of a corresponding DMRS is calculated under the condition that a physical sidelink feedback channel PSFCH exists in each time slot in a resource pool; alternatively, the first and second electrodes may be,
reference resource overhead for a corresponding DMRS in the absence of a PSFCH in each slot in the resource pool.
9. The method of claim 7, wherein, if the reference resource overhead for the DMRS is determined according to a predefined rule, the reference resource overhead for the DMRS is:
and reference resource overhead of the corresponding DMRS under the condition that the last N reference symbol numbers in the resources can not be used for the DMRS, wherein N-1 is the PSFCH overhead of the reference.
10. The method of claim 1, wherein the reference resource overhead of the second level SCI is associated with a MCS or a modulation order QmAnd (6) associating.
11. The method of claim 1, wherein the first reference resource overhead is determined according to a third parameter and a second mapping relationship, and the second mapping relationship is a mapping relationship between the parameter and the resource overhead.
12. The method of claim 11 wherein the third parameters include at least one of a format of the second-level SCI, a fixed code point in the first-level SCI, and a transmission type of the second-level SCI.
13. The method of claim 12, wherein the reference resource overhead comprises a reference resource overhead for CSI-RS if the third parameter is used to indicate a first transmission mode, wherein the first transmission mode comprises any one of:
unicasting the unicast;
unicast and multicast type group _ host type 2;
unicast, groupcast type2, and broadcast.
14. The method of claim 12, wherein the second mapping relationship comprises:
mapping relation between the third parameter and reference resource overhead of the CSI-RS, wherein the reference resource overhead of the CSI-RS is first overhead; or
Under the condition that the third parameter includes a resource parameter of a first resource, if the resource parameter of the first resource satisfies a preset condition, the reference resource overhead of the CSI-RS is a first overhead, where the first resource includes: indicating or reserved PSSCH resources or resources for transmitting the CSI-RS.
15. The method of claim 14, wherein the resource parameter is a bandwidth size or a sequence length; the preset conditions include: the bandwidth size or the sequence length is greater than or equal to a preset threshold.
16. The method of claim 14, wherein the first overhead comprises any of:
a protocol predefined reference value;
a network preconfigured reference value;
overhead for configuration of a CSI-RS;
an average of overheads of configuration of the multiple CSI-RSs;
wherein the configuration of the one CSI-RS and/or the configuration of the plurality of CSI-RSs are predefined by a protocol or preconfigured by a network.
17. A terminal, comprising:
a first determining module to determine a first reference resource overhead;
a second determining module, configured to determine a first TBS according to the first reference resource overhead;
wherein the first reference resource overhead comprises reference resource overhead of the second-level SCI and/or reference resource overhead of the CSI-RS.
18. The terminal of claim 17, wherein the reference resource overhead for the second level SCI is determined based on the first beta value and a reference TBS.
19. The terminal of claim 18, wherein the first beta value comprises at least one of:
beta values indicated in the first-level SCI;
determining a beta value according to a first parameter and a first mapping relation, wherein the first mapping relation is the mapping relation between the parameter and the beta value;
a protocol predefined value;
a value configured by a radio resource control RRC or a media access control (MAC CE) control unit, or a value indicated by Downlink Control Information (DCI);
a value associated with a modulation and coding scheme, MCS.
20. The terminal of claim 18, wherein the reference TBS is determined based on a second parameter, wherein the second parameter comprises at least one of:
modulation order Qm；
Code rate R;
number of reference symbols N of physical side link shared channel PSSCHsymb；
Frequency domain resource size N indicated by first-level SCIPRB；
Number of subcarriers N in PRBSC；
Modulation and coding scheme MCS.
21. The terminal of claim 20, wherein the reference TBS is: the product of the modulation order, the code rate, the number of reference symbols of the PSSCH, the number of subcarriers in the PRB, and the size of the frequency domain resource; alternatively, the first and second electrodes may be,
the reference TBS is: the code rate, the number of reference symbols of the PSSCH, the number of subcarriers in the PRB, and an integer multiple of the product of the frequency domain resource size.
22. The terminal of claim 18, wherein a reference resource overhead of the second level SCI is determined according to the first beta value, a reference TBS, and a number of available resources, wherein the number of available resources is determined according to a reference resource overhead of the DMRS.
23. The terminal of claim 22, wherein the reference resource overhead for the DMRS is determined according to at least one of:
a protocol-predefined number of symbols;
the number of symbols of the RRC configuration;
a predefined rule;
the number of reference symbols of the DMRS is obtained according to the pattern of the DMRS, and the pattern of the DMRS is indicated by the first-level SCI or PSCCH or RRC.
24. The terminal of claim 23, wherein, in the case that the reference resource overhead for the DMRS is determined according to a predefined rule, the reference resource overhead for the DMRS comprises:
reference resource overhead of a corresponding DMRS is calculated under the condition that a physical sidelink feedback channel PSFCH exists in each time slot in a resource pool; alternatively, the first and second electrodes may be,
reference resource overhead for a corresponding DMRS in the absence of a PSFCH in each slot in the resource pool.
25. The terminal of claim 23, wherein, in case the reference resource overhead for the DMRS is determined according to a predefined rule, the reference resource overhead for the DMRS is:
and reference resource overhead of the corresponding DMRS under the condition that the last N reference symbol numbers in the resources can not be used for the DMRS, wherein N-1 is the PSFCH overhead of the reference.
26. The terminal of claim 17, wherein the reference resource overhead of the second level SCI is associated with MCS or modulation order QmAnd (6) associating.
27. The terminal of claim 17, wherein the first reference resource overhead is determined according to a third parameter and a second mapping relationship, and the second mapping relationship is a mapping relationship between a parameter and a resource overhead.
28. The terminal of claim 27 wherein the third parameters include at least one of a format of the second-level SCI, a fixed code point in the first-level SCI, and a transmission type of the second-level SCI.
29. The terminal of claim 28, wherein the reference resource overhead comprises a reference resource overhead for CSI-RS if the third parameter is used to indicate a first transmission mode, wherein the first transmission mode comprises any of:
unicasting the unicast;
unicast and groupcast type 2;
unicast, groupcast type2, and broadcast.
30. The terminal of claim 28, wherein the second mapping relationship comprises:
mapping relation between the third parameter and reference resource overhead of the CSI-RS, wherein the reference resource overhead of the CSI-RS is first overhead; or
Under the condition that the third parameter includes a resource parameter of a first resource, if the resource parameter of the first resource satisfies a preset condition, the reference resource overhead of the CSI-RS is a first overhead, where the first resource includes: indicating or reserved PSSCH resources or resources for transmitting the CSI-RS.
31. The terminal of claim 30, wherein the resource parameter is a bandwidth size or a sequence length; the preset conditions include: the bandwidth size or the sequence length is greater than or equal to a preset threshold.
32. The terminal of claim 30, wherein the first overhead comprises any of:
a protocol predefined reference value;
a network preconfigured reference value;
overhead for configuration of a CSI-RS;
an average of overheads of configuration of the multiple CSI-RSs;
wherein the configuration of the one CSI-RS and/or the configuration of the plurality of CSI-RSs are predefined by a protocol or preconfigured by a network.
33. A terminal, comprising: memory, processor and computer program stored on said memory and executable on said processor, said computer program, when executed by said processor, implementing the steps in the method for determination of a TBS according to any of claims 1 to 16.
34. A computer-readable storage medium, characterized in that a computer program is stored thereon, which computer program, when being executed by a processor, realizes the steps in the method for determining a TBS according to any one of the claims 1 to 16.
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