CN111867092A

CN111867092A - Method performed by user equipment and user equipment

Info

Publication number: CN111867092A
Application number: CN201910366545.7A
Authority: CN
Inventors: 罗超; 刘仁茂; 赵毅男
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2020-10-30
Also published as: WO2020221241A1

Abstract

The invention provides a method executed by user equipment, which comprises the following steps: receiving direct-line control information SCI carried by a physical direct-line control channel PSCCH; and determining the time domain and/or frequency domain resource allocation of the physical straight-line shared channel PSSCH scheduled by the PSCCH according to the SCI.

Description

Method performed by user equipment and user equipment

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to a method performed by a user equipment and a corresponding user equipment.

Background

V2X (Vehicle-to-updating) communication refers to communication between a Vehicle (Vehicle) and any entity that may affect the Vehicle. Typical V2X communications include V2I (Vehicle-to-Infrastructure), V2N (Vehicle-to-network), V2V (Vehicle-to-Vehicle), V2P (Vehicle-to-Pedestrian), and the like.

In the LTE standard of 3GPP, V2V communication (3GPP V2X phase1) is supported from Rel-14, and V2X communication (3GPP V2X phase 2) is supported from Rel-15. In the 3GPP standard specification, V2V and V2X are both based on D2D (Device to Device) technology, and the interface between the corresponding UE and UE is referred to as PC5, and also referred to as "direct" or "sidelink" (SL) link in the physical layer, for distinguishing between Uplink (UL) link and Downlink (DL) link.

With the progress of standardization work for 5G NR (see non-patent document 1, hereinafter abbreviated as 5G, or NR, or NRRel-15, or 5G Rel-15) and the recognition by 3GPP of more advanced V2X service (eV2X service) demands, 3GPP V2Xphase 3, i.e., 5G V2X, began to be proposed. In the 6 th year 2018, a new research project on 3GPP 5GV2X (see non-patent document 2, hereinafter, referred to as 5G V2X research project or V2X Phase3 research project) was approved at 3GPP RAN #80 times congress. In 3 months of 2019, a new work item (see non-patent document 3, hereinafter referred to as 5G V2X work item) on 3GPP RAN #83 global meeting was approved for 3GPP 5G V2X. The goals of the 5G V2X work project include:

the design of SL signals, channels, Bandwidth Segments (BWPs) and resource pools (resource pools).

Design of resource allocation mechanism.

Design of SL synchronization mechanism.

Coexistence of SL operation for LTE and NR.

SL physical layer processes such as HARQ processes, CSI acquisition and power control, etc.

Congestion control.

Layer 2/layer 3 protocols and signaling.

Control of LTE SL over NR Uu interface.

gNB scheduling based on UE reporting assistance information.

QoS management.

In 5G V2X, the SL interface physical layer supports broadcast (broadcast), multicast (groupcast) and unicast (unicast) transmission in the in-coverage, out-of-coverage and partial-coverage scenarios.

5G V2X supports the SL synchronization function. The associated signals and channels include:

SL PSS (Primary Linear Synchronization Signal), also known as S-PSS, or PSSS (Primary Linear Synchronization Signal).

SL SSS (Single Secondary Synchronization Signal), also called S-SSS, or SSSS (Secondary Synchronization Signal).

PSBCH (Physical Sidelink Broadcast Channel).

In 5G V2X, the SL PSS, SL SSS and PSBCH are organized in a block form on a time-frequency resource grid, called SLSSB (Sidelink SS/PBCH block, direct line synchronization signal/physical broadcast channel block), or S-SSB. The transmission Bandwidth of the SL SSB is within the SL BWP (Sidelink Bandwidth Part) configured for the UE. The SL PSS and/or the SL SSS may carry a SL SSID (Sidelink Synchronization Identity, or Sidelink Synchronization Signal Identity), and the PSBCH may carry a SL MIB (Sidelink Master Information Block, inline Master Information Block).

A synchronization source (sometimes also referred to as a synchronization reference) of 5G V2X may include a GNSS (Global navigation satellite system), a gNB, an eNB, and an NR UE. The priority definition of the synchronization source is shown in table 1. Wherein the UE determines whether to use "GNSS based synchronization" or "gNB/eNB based synchronization" by means of (pre) configuration information.

TABLE 15G V2X Sync Source priority

Priority level	GNSS-based synchronization	gNB/eNB based synchronization
			P0	GNSS	gNB/eNB
P1	All UEs synchronized directly to GNSS	All UEs synchronized directly to gNB/eNB
			P2	All UEs indirectly synchronized to GNSS	All UEs synchronized indirectly to gNB/eNB
P3	Any other UE	GNSS
			P4	N/A	All UEs synchronized directly to GNSS
P5	N/A	All UEs indirectly synchronized to GNSS
			P6	N/A	Any other UE

In a non-coverage scenario, and in RRC _ IDLE state, one SL BWP (Sidelink Bandwidth Part) may be (pre) configured on one 5G V2X carrier. In the covered scenario, there is only one active (or active) SL BWP on one 5G V2X carrier. One or more Resource pools (Resource Pool, referring to a set of time-frequency resources that may be used for SL transmission and/or reception) may be (pre-) configured on one SL BWP.

The resource allocation of 5G V2X can be classified as follows:

mode 1: the base station schedules SL resources for SL transmission.

Mode 2: the UE determines SL resources for SL transmission (i.e., the base station does not participate in scheduling of SL resources).

The other channels involved in 5G V2X include at least:

PSSCH (Physical Sidelink Shared Channel).

PSCCH (physical direct Control Channel).

PSFCH (Physical Sidelink Feedback Channel).

In 5G V2X, the UE schedules transmission of data carried by the PSCCH through SCI (Sidelink Control Information) carried by the PSCCH. Depending on factors such as whether unicast or multicast or broadcast transmissions are scheduled, and whether HARQ feedback is required, one or more of the following may be included in the SCI:

layer 1 Source identifier (Layer-1 Source ID), or Physical Layer Source identifier (Physical Layer Source ID).

Layer 1 target identifier (Layer-1 Destination ID), or Physical Layer target identifier (Physical Layer Source ID).

HARQ Process identification (HARQ Process ID), or HARQ Process number (HARQ Process number).

New Data Indicator (NDI).

Redundancy Version (Redundancy Version, RV).

In 5G V2X, the multiplexing method of the PSCCH and its associated PSCCH at least includes: a portion of a PSCCH and a portion of a PSCCH with which it is associated use resources that overlap in the time domain (overlapping) but do not overlap in the frequency domain (non-overlapping), while another portion of the PSCCH and/or another portion of the PSCCH use resources that do not overlap in the time domain. An example of such a multiplexing scheme is shown in fig. 1.

In 5G V2X, the design of SL links may face problems including at least:

how to efficiently indicate in the SCI the time and/or frequency domain resources allocated to its scheduled psch.

How to efficiently configure the time domain resources of SL carrier and/or BWP, especially when 5GV2X UE and other UEs (e.g. UE supporting 5G Rel-15) share the same carrier resources.

Documents of the prior art

Non-patent document

Non-patent document 1: RP-181474, Revised WID on New Radio Access Technology

Non-patent document 2: RP-181429, New SID: study on 5G V2X

Non-patent document 3: RP-190766, New WID on 5G V2X with NR sidelink

Disclosure of Invention

To solve at least part of the above problems, the present invention provides a method performed by a user equipment and the user equipment, which can efficiently indicate in the SCI the time domain and/or frequency domain resources allocated to its scheduled psch.

According to the invention, a method performed by a user equipment is proposed, characterized by comprising: receiving direct-line control information SCI carried by a physical direct-line control channel PSCCH; and determining the time domain and/or frequency domain resource allocation of the physical straight-line shared channel PSSCH scheduled by the PSCCH according to the SCI.

Preferably, the SCI indicates any one or more of: a time domain resource allocation indicating a time domain resource allocated for the PSSCH; and a frequency domain resource allocation indicating the frequency domain resources allocated for the PSSCH.

Preferably, the time domain resource allocation comprises one or more of: the number S of all OFDM symbols allocated to the PSSCH; number n of starting OFDM symbol of the PSSCH^starting(ii) a And the number S of OFDM symbols allocated for the PSSCH but not allocated for the PSCCH₂。

Preferably, the frequency domain resource allocation comprises one or more of: the number L of PSSCH frequency domain resource allocation units occupied by the PSSCH; PSSCH-specific frequency-domain resource allocation L₂。

Preferably, the determined time and/or frequency domain resource allocation of the psch comprises one or more of: the number S of OFDM symbols occupied by the PSSCH; number n of starting OFDM symbol of the PSSCH ^starting(ii) a Number n of the PSSCH's ending OFDM symbol^ending(ii) a Set C of OFDM symbols occupied by the PSSCH_T(ii) a The number L of PSSCH frequency domain resource allocation units occupied by the PSSCH; the number m of the initial PSSCH frequency domain resource allocation unit occupied by the PSSCH^starting(ii) a The number m of the PSSCH frequency domain resource allocation unit which is occupied by the PSSCH and ends the PSSCH^ending(ii) a And set C of PSSCH frequency domain resource allocation unit occupied by the PSSCH_F。

Preferably, S is determined by any one of the following:

s is directly indicated by the time domain resource allocation;

·S＝S₁+S₂；

·S＝S₁；

·S＝S₂，

wherein S is₁Is the number of OFDM symbols occupied by the PSCCH.

Preferably, n^startingIs determined by the following means:

·n^startingdirectly indicated by the time domain resource allocation;

·n^starting＝n₁；

·n^starting＝n₁+S₁，

wherein n is₁Is the number of the starting OFDM symbol of the PSCCH within a slot.

Preferably, L is determined by any one of the following:

l is directly indicated by the frequency domain resource allocation;

·

·

·

·

·L＝L₁，

wherein L is₁Is the number of PSCCH frequency domain resource allocation units occupied by the PSCCH, m₁Is the number of the starting PSCCH frequency domain resource allocation unit occupied by the PSCCH,

R₂＝L′₂ mod 2, or R₂＝(L-L′₂) mod 2, wherein L'₂Is the number of PSSCH frequency domain resource allocation units which are not overlapped with the frequency domain resources occupied by the PSSCH in the set of PSSCH frequency domain resource allocation units occupied by the PSSCH,

K_PSSCHIs the psch frequency domain resource allocation unit,

K_PSCCHis the PSCCH frequency domain resource allocation unit.

Preferably, m^startingIs determined by any one of the following:

·m^starting＝m₁；

·

·

·

·

wherein m is₁Is the number of the starting PSCCH frequency domain resource allocation unit occupied by the PSCCH,

K_PSSCHis the psch frequency domain resource allocation unit,

K_PSCCHis the PSCCH frequency domain resource allocation unit.

Further, according to the present invention, there is provided a user equipment comprising: a processor; and a memory storing instructions, wherein the instructions, when executed by the processor, perform the method described above.

Effects of the invention

According to the present invention, a method performed by a user equipment and the user equipment can be provided, which can efficiently indicate in the SCI the time domain and/or frequency domain resources allocated to its scheduled psch.

Drawings

The above and other features of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which:

fig. 1 is a diagram showing an example of a multiplexing scheme of PSCCH and PSCCH in time and frequency domains.

Fig. 2 is a flowchart illustrating a method performed by a user equipment according to a first embodiment of the present invention.

Fig. 3 is a flow chart illustrating a method performed by a user equipment according to a second embodiment of the present invention.

Fig. 4 is a flowchart illustrating a method performed by a user equipment according to a third embodiment of the present invention.

Fig. 5 is a flowchart illustrating a method performed by a user equipment according to a fourth embodiment of the present invention.

Fig. 6 is a block diagram schematically illustrating a user equipment to which the present invention relates.

Detailed Description

The invention is described in detail below with reference to the figures and the detailed description. It should be noted that the present invention should not be limited to the specific embodiments described below. In addition, for the sake of brevity, detailed descriptions of well-known technologies not directly related to the present invention are omitted to prevent confusion of understanding of the present invention.

Embodiments according to the present invention are described in detail below with a 5G mobile communication system and its subsequent evolution as an example application environment. However, it is to be noted that the present invention is not limited to the following embodiments, but is applicable to more other wireless communication systems, such as a communication system after 5G and a 4G mobile communication system before 5G, and the like.

Some terms to which the present invention relates will be described below, and the terms to which the present invention relates are defined herein, unless otherwise specified. The terms given in the invention may adopt different naming manners in LTE, LTE-Advanced Pro, NR and the following communication systems, but the unified terms adopted in the invention can be replaced by the terms adopted in the corresponding systems when being applied to the specific systems.

3 GPP: 3rd Generation partnershift Project, third Generation Partnership Project

AS: access Stratum, Access Stratum

BWP: bandwidth Part, Bandwidth fragment

CA: carrier Aggregation, Carrier Aggregation

CCE: control-channel element, control-channel element

CORESET: control-resource set, control resource set

And (3) CP: cyclic Prefix, Cyclic Prefix

CP-OFDM: cyclic Prefix Orthogonal Frequency Division Multiplexing, Cyclic Prefix Orthogonal Frequency Division Multiplexing

CRB: common Resource Block, Common Resource Block

CRC: cyclic Redundancy Check (crc)

CSS: common Search Space, Common Search Space

DC: dual Connectivity, Dual Connectivity

DCI: downlink Control Information, Downlink Control Information

DFT-s-OFDM: discrete Fourier transform Spread orthogonal frequency Division Multiplexing

DL: downlink, Downlink

DL-SCH: downlink Shared Channel, Downlink Shared Channel

DM-RS: demodulation reference signal, Demodulation reference signal

eMBB: enhanced Mobile Broadband communications

FDRA: frequency Domain Resource Assignment, Frequency Domain Resource allocation

FR 1: frequency Range1, Frequency Range1

FR 2: frequency Range1, Frequency Range 2

HARQ: hybrid Automatic Repeat Request (HARQ)

IE: information Element, Information Element

IP: internet Protocol (IP)

LCID: logical Channel ID, Logical Channel identifier

LTE-A: long Term Evolution-Advanced, a Long Term Evolution technology upgrade

MAC: medium Access Control, Medium Access Control

MAC CE: MAC Control Element, MAC Control Element

MCG (calcium carbonate): master Cell Group, Master Cell Group

MIB: master Information Block, Master Information Block

mMTC: massive Machine Type Communication

NAS: Non-Access-Stratum, Non-Access Stratum

NR: new Radio, New Radio

NUL: normal Uplink, Normal Uplink

OFDM: orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing

PBCH: physical Broadcast Channel, Physical Broadcast Channel

PDCCH: physical Downlink Control Channel, Physical Downlink Control Channel

PDCP: packet Data Convergence Protocol (PDMP)

PDSCH: physical Downlink Shared Channel (pdcch)

PSBCH: physical Sidelink Broadcast Channel, Physical direct Broadcast Channel

PSCCH: physical Sidelink Control Channel, a Physical direct Control Channel

PSSCH: physical Sidelink Shared Channel, a Physical direct Shared Channel

PRB: physical Resource Block, Physical Resource Block

PSS: primary Synchronization Signal, Primary Synchronization Signal

PSSS: primary Sidelink Synchronization Signal, Primary inline Synchronization Signal

PTAG: primary Timing Advance Group, Primary Timing Advance Group

PUSCH: physical uplink shared channel (PRCH)

PUCCH: physical uplink control channel, Physical uplink control channel

QCL: quasi co-location of Quasi co-location

An RAR: random Access Response (RANDOM ACCESS RESPONSE)

RB: resource Block, Resource Block

RE: resource Element, Resource Element

REG: resource-element group, resource element group

RF: radio Frequency, Radio Frequency

RLC: radio Link Control, Radio Link Control protocol

RNTI: Radio-Network Temporary Identifier (RNTI)

RRC: radio Resource Control, Radio Resource Control

SCG: secondary Cell Group, subcell Group

SCI: sidelink Control Information, straight-line Control Information

SCS: subcarrier Spacing, Subcarrier Spacing

SDAP: service Data Adaptation Protocol

SFN: system Frame Number, System Frame Number

SIB: system Information Block

SL: sidelink, straight

SL BWP: sidelink Bandwidth Part, straight-forward Bandwidth fragment

SL PSS: sidelink Primary Synchronization Signal, straight Primary Synchronization Signal

SL SSB: sidelink SS/PBCH block, inline Sync Signal/physical broadcast channel Block

SL SSS: sidelink Secondary Synchronization Signal, direct auxiliary Synchronization Signal

SpCell: special Cell, Special Cell

SRS: sounding Reference Signal

And (3) SSB: SS/PBCH block, Sync Signal/physical broadcast channel Block

SSS: secondary Synchronization Signal, Secondary Synchronization Signal

SSSS: secondary Sidelink Synchronization Signal, Secondary inline Synchronization Signal

STAG: secondary Timing Advance Group, Secondary Timing Advance Group

SUL: supplement Uplink, supplement Uplink

TA: timing Advance, Timing Advance

TAG: timing Advanced Group, Timing advance Group

TCP: transmission Control Protocol, Transmission Control Protocol

TDD: time Division Duplexing

TPC: transmit power control, transmission power control

UE: user Equipment, User Equipment

UL: uplink, Uplink

URLLC: Ultra-Reliable and Low Latency Communication

And (3) USS: UE-specific Search Space, UE-specific Search Space

V2I: Vehicle-to-Infrastructure, Vehicle-to-Infrastructure

V2N: vehicle-to-network, Vehicle-to-network

V2P: Vehicle-to-Pedestrian

V2V: Vehicle-to-Vehicle

V2X: vehicle-to-aircraft, Vehicle to any entity

[ example one ]

The method performed by the user equipment according to the first embodiment of the present invention is described below with reference to fig. 2.

As shown in fig. 2, in a first embodiment of the present invention, a user equipment UE performs the steps including: step S201 and step S203.

Specifically, in step S201, the straight line control information (SCI) is received. Wherein the content of the first and second substances,

optionally, the SCI may be carried in the PSCCH. Wherein the content of the first and second substances,

optionally, the PSCCH may be used for scheduling the PSCCH, in other words, SCI carried by the PSCCH may be used for scheduling the PSCCH.

Alternatively, the PSCCH may occupy S ₁One OFDM symbol (e.g., S)₁One consecutive OFDM symbol). Wherein the content of the first and second substances,

optionally, the S₁One OFDM symbol refers to S in the same time slot₁One OFDM symbol.

Optionally, the PSCCH may occupy more than one time slot, with S occupied in each occupied time slot₁One OFDM symbol.

Optionally, the PSSCH also occupies the S₁One OFDM symbol, e.g. the PSCCH occupies the S₁A portion of the frequency domain resources (denoted as Δ) over one OFDM symbol₁) And the PSSCH occupies the S₁Another part of the frequency domain resources (denoted as delta) on one OFDM symbol₂) And Δ₁And Δ₂There is no overlap.

O optionally, except for the S₁The PSSCH occupies zero or one or more other OFDM symbols determined in other ways in addition to the OFDM symbols.

Optionally, the PSSCH may occupy more than one slot, with the S occupied in each occupied slot₁One OFDM symbol. Optionally, the psch also occupies zero or one or more other OFDM symbols determined in other ways within each occupied slot.

Optionally, the S₁The value set of (a) may be any one of the following:

◇{1，2}

◇{1，2，3}

◇{1，2，3，4}

◇{1，2，3，4，5}

◇{1，2，3，4，5，6}

◇{1，2，3，4，5，6，7}

◇{1，2，3，4，5，6，7，8}

◇{1，2，3，4，5，6，7，8，9}

◇{1，2，3，4，5，6，7，8，9，10}

◇{1，2，3，4，5，6，7，8，9，10，11}

◇{1，2，3，4，5，6，7，8，9，10，11，12}

◇{1，2，3，4，5，6，7，8，9，10，11，12，13}

◇{1，2，3，4，5，6，7，8，9，10，11，12，13，14}

◇{2，3，4，5，6，7，8，9，10，11，12，13，14}

◇{2，3，4，5，6，7，8，9，10，11，12，13}

◇{2，3，4，5，6，7，8，9，10，11，12}

◇{3，4，5，6，7，8，9，10，11，12，13，14}

◇{3，4，5，6，7，8，9，10，11，12，13}

◇{3，4，5，6，7，8，9，10，11，12}

◇{4，5，6，7，8，9，10，11，12，13，14}

◇(4，5，6，7，8，9，10，11，12，13}

◇{4，5，6，7，8，9，10，11，12}

optionally, S₁The value sets of (a) may be related to a Cyclic Prefix (CP) configuration, for example, one set is taken when a normal CP (for example, an SL carrier or an SL BWP or a resource pool where the PSCCH and/or the PSCCH is located is configured as a normal CP), and the other set is taken when an extended CP (for example, an SL carrier or an SL BWP or a resource pool where the PSCCH and/or the PSCCH is located is configured as an extended CP).

Optionally, the number of the starting (or first) OFDM symbol of the PSCCH may be denoted as n₁。

Optionally, n₁May be the number of the starting OFDM symbol of the PSCCH within a slot.

Optionally, n₁The value set of (a) may be any one of the following:

◇{0，1}

◇{0，1，2}

◇{0，1，2，3}

◇{0，1，2，3，4}

◇{0，1，2，3，4，5}

◇{0，1，2，3，4，5，6}

◇{0，1，2，3，4，5，6，7}

◇{0，1，2，3，4，5，6，7，8}

◇{0，1，2，3，4，5，6，7，8，9}

◇{0，1，2，3，4，5，6，7，8，9，10}

◇{0，1，2，3，4，5，6，7，8，9，10，11}

◇{0，1，2，3，4，5，6，7，8，9，10，11，12}

◇{0，1，2，3，4，5，6，7，8，9，10，11，12，13}

optionally, n₁The value sets of (a) may be related to a Cyclic Prefix (CP) configuration, for example, one set is taken when a normal CP (for example, an SL carrier or an SL BWP or a resource pool where the PSCCH and/or the PSCCH is located is configured as a normal CP), and the other set is taken when an extended CP (for example, an SL carrier or an SL BWP or a resource pool where the PSCCH and/or the PSCCH is located is configured as an extended CP).

Alternatively, the PSCCH may occupy L₁And each PSCCH frequency domain resource allocation unit. Optionally, the PSCCH frequency domain resource allocation unit may be a PSCCH subchannel (subchannel), a Resource Block (RB), a Resource Block Group (RBG), a subcarrier (subcarrier), or another unit. The resource block may be a Virtual Resource Block (VRB), a Physical Resource Block (PRB), a Common Resource Block (CRB), or a resource block defined in other manners. Optionally, the size of the PSCCH frequency domain resource allocation unit may be represented by the number of resource blocks, which is denoted as K _PSCCH. For example, if the PSCCH frequency domain resource allocation unit is a PSCCH subchannel, K is_PSCCHIs the size of the PSCCH subchannel. For example, if K_PSCCHEqual to 2 resource blocks, and L ₁2, the PSCCH occupies 4 resource blocks.

Alternatively, the PSCCH frequency-domain resource allocation unit numbered 0 is referred to as a reference PSCCH frequency-domain resource allocation unit. Optionally, a starting resource block (denoted as "PSCCH" frequency domain resource allocation unit ") of the reference PSCCH frequency domain resource allocation unit

) May be a starting resource block of an SL carrier or an SL BWP or a resource pool where the PSCCH and/or PSCCH are located, or may be a predefined or preconfigured or configured value.

Optionally, the number of the starting PSCCH frequency domain resource allocation unit occupied by the PSCCH may be denoted as m₁。

Optionally, any one or more of the following may be indicated in the SCI:

time domain resource allocation (time domain resource allocation). Wherein the content of the first and second substances,

optionally, the time domain resource allocation is used to indicate the time domain resource allocated for the psch.

Optionally, the time domain resource allocation may be indicated by a field in the SCI, a part of bits of a field in the SCI, a part of values of a field in the SCI, or multiple fields in the SCI.

Optionally, the time domain resource allocation may include: the number of all OFDM symbols allocated for the PSSCH (denoted as S). Wherein the content of the first and second substances,

optionally, the PSCCH also occupies zero or one or more of the S OFDM symbols.

Optionally, the time domain resource allocation may include: the number of the starting OFDM symbol of the PSSCH (denoted as n)^starting). Wherein the content of the first and second substances,

o optionally, said n^startingMay be the number of the OFDM symbol relative to the first OFDM symbol of the slot in which the PSCCH is located, i.e. OFDM symbol 0. E.g. n ^starting1 denotes the second OFDM symbol of the slot in which the PSCCH is located.

O optionally, said n^startingMay be relative to the starting OFDM symbol (i.e. n) of the PSCCH₁) The number of OFDM symbols of (1). E.g. n ^starting1 represents n₁The next OFDM symbol.

Optionally, the time domain resource allocation may include: the number of OFDM symbols allocated to the PSSCH but not allocated to the PSCCH (denoted S)₂). Wherein the content of the first and second substances,

o optionally, the S₂The individual OFDM symbols may also be referred to as PSSCH-only (or PSSCH-specific, psschhsppectic) OFDM symbols.

O optionally, the S₂One OFDM symbol can also be called PSSCH occupied and PSCCH not repeated A superimposed OFDM symbol.

O optionally, the PSSCH occupies the S₂The same frequency domain resource (denoted as Δ) on each of the OFDM symbols₃) While the PSCCH does not occupy the S₂Any frequency domain resource over one OFDM symbol.

Alternatively, Δ₃＝Δ₁+Δ₂。

O optionally, the S₂One OFDM symbol refers to S in the same time slot₂One OFDM symbol.

Optionally, the PSSCH also occupies zero or one or more other OFDM symbols determined in other ways.

Optionally, the PSSCH may occupy more than one slot, with S occupied in each occupied slot₂One OFDM symbol. Optionally, the psch also occupies zero or one or more other OFDM symbols determined in other ways within each occupied slot.

O optionally, the S₂The value set of (a) may be any one of the following:

{0，1，2，3，4，5，6，7，8，9，10，11，12，13}

{0，1，2，3，4，5，6，7，8，9，10，11，12}

{0，1，2，3，4，5，6，7，8，9，10，11}

{0，1，2，3，4，5，6，7，8，9，10}

{0，1，2，3，4，5，6，7，8，9}

{0，1，2，3，4，5，6，7，8}

{0，1，2，3，4，5，6，7}

{0，1，2，3，4，5，6}

{0，1，2，3，4，5}

{0，1，2，3，4}

{0，1，2，3}

{0，1，2}

{0，1}

o optionally, S₂The value set of (a) may be related to a Cyclic Prefix (CP) configuration, for example, a set is taken when a normal CP (for example, an SL carrier or an SL BWP or a resource pool where the PSCCH and/or the PSCCH is located is configured as a normal CP), and a set is taken when an extended CP (for example, an SL carrier or an SL BWP or a resource pool where the PSCCH and/or the PSCCH is located is configured as a normal CP)SL BWP or resource pool configured as extended CP) takes another set.

Frequency domain resource allocation (frequency domain resource allocation). Wherein the content of the first and second substances,

optionally, the frequency domain resource allocation is used to indicate the frequency domain resources allocated for the psch. The unit of the frequency domain resource allocation may be referred to as a "psch frequency domain resource allocation unit".

Optionally, the unit of PSSCH frequency domain resource allocation may be a PSSCH subchannel, or a resource block group, or a subcarrier, or other units, where the resource block may be a virtual resource block, or a physical resource block, or a common resource block, or a resource block defined in other manners. For example, the frequency domain resource allocated for the psch may be a set of one or more psch subchannels (or resource blocks, or resource block groups, or subcarriers), where each psch subchannel (or resource block, or resource block group, or subcarrier) has a different frequency location and a different number. Optionally, the size of the psch frequency domain resource allocation unit may be represented by the number of resource blocks, which is denoted as K_PSSCH. For example, if the PSSCH frequency domain resource allocation unit is a PSSCH subchannel, K _PSSCHIs the size of the psch subchannel. For example, if K_PSSCHEqual to 3 resource blocks, and L₁And 3, the PSSCH occupies 9 resource blocks.

Optionally, the PSSCH frequency-domain resource allocation unit numbered 0 is referred to as a reference PSSCH frequency-domain resource allocation unit. Optionally, a starting resource block (denoted as "PSSCH") of the PSSCH frequency-domain resource allocation unit

) May be a starting resource block of an SL carrier or an SL BWP or a resource pool where the PSCCH and/or PSCCH are located, or may be a predefined or preconfigured or configured value. Alternatively,

is K_PSCCHAnd K_PSSCHThe common multiple of. Optionally, D ═ 0.

Optionally, the PSSCH frequency-domain resource allocation unit may be the same as the PSCCH frequency-domain resource allocation unit (for example, the PSSCH frequency-domain resource allocation unit is a PSSCH subchannel, the PSCCH frequency-domain resource allocation unit is a PSCCH subchannel, and the PSSCH subchannel and the PSCCH subchannel have the same definition), or may be different from the PSCCH frequency-domain resource allocation unit (for example, the PSSCH frequency-domain resource allocation unit is a PSSCH subchannel, and the size of the PSSCH subchannel is equal to 4 resource blocks; in addition, the PSCCH frequency-domain resource allocation unit is a PSCCH subchannel, and the size of the PSCCH subchannel is equal to 2 resource blocks; in addition, the PSSCH frequency-domain resource allocation unit is a PSSCH subchannel, and the size of the PSSCH subchannel is equal to 4 resource blocks; and in addition, the PSCCH frequency-domain resource allocation unit is a resource block).

Optionally, the frequency domain resource allocation may be indicated by a field in the SCI, a part of bits of a field in the SCI, a part of values of a field in the SCI, or multiple fields in the SCI.

Optionally, the frequency domain resource allocation may include any one or more of the following (in any combination of and or, where applicable):

◇L。

o PSSCH specific (PSSCH specific) frequency-domain resource allocation (noted L)₂). For example, L₂May be equal to any of the following:

L′₂。

L′₂/2。

L-L′₂。

(L-L′₂)/2。

wherein the content of the first and second substances,

l is the number of psch frequency domain resource allocation units occupied by the psch (or the size of the set of psch frequency domain resource allocation units occupied by the psch).

◇L′₂The number of PSSCH frequency domain resource allocation units which are not overlapped with the frequency domain resource occupied by the PSSCH in the set of PSSCH frequency domain resource allocation units occupied by the PSSCH.

Alternatively, "the frequency domain resources occupied by the PSCCH do not overlap" may mean that there is no overlap on any resource block in the frequency domain. For example, in the example shown in fig. 1, the set of PSSCH frequency domain resource allocation units occupied by the PSSCH (assuming that the unit is referred to as a PSSCH subchannel) is X ═ 1, 2, 3, where the set of resource blocks corresponding to the PSSCH subchannel 1 is {3, 4, 5}, the set of resource blocks corresponding to the PSSCH subchannel 2 is {6, 7, 8}, and the set of resource blocks corresponding to the PSSCH subchannel 3 is {9, 10, 11 }; the set of resource blocks corresponding to the frequency domain resources occupied by the PSCCH is 4, 5,6,7}. Therefore, in the set X, only one PSSCH subchannel which does not overlap with the resource block occupied by the PSCCH (namely PSSCH subchannel 3) exists, so L'₂1. Optionally, "the frequency domain resources occupied by the PSCCH are not overlapped" may also mean that any PSCCH subchannel, or subcarrier, or resource block group on the frequency domain is not overlapped.

Optionally, in a case that the PSCCH frequency-domain resource allocation unit and the PSCCH frequency-domain resource allocation unit are the same (for example, the PSCCH subchannel and the PSCCH subchannel, respectively, and the PSCCH subchannel are defined the same, and are simply referred to as "subchannels"), L ″.₂Or may be expressed as "the number of subchannels allocated for the PSCCH but not allocated for the PSCCH".

Alternatively, if

Or

L₂＝L′₂/2, the frequency domain resource allocation may further include R₂＝L′₂ mod 2。

Alternatively, if

Or

L₂＝(L-L′₂) /2, the frequency domain resource allocation may further include R₂＝(L-L′₂)mod 2。

Further, at step S203, one or more of the following are determined according to the SCI:

the number of OFDM symbols occupied by the psch (denoted as S).

Optionally, the S OFDM symbols refer to S OFDM symbols within the same slot.

Alternatively, the PSSCH may occupy more than one slot, with S OFDM symbols occupied in each occupied slot.

The number of the starting OFDM symbol of the PSSCH (denoted as n)^starting). For example,

the starting OFDM symbol of the PSSCH is numbered within one slot.

The number of the end (or last) OFDM symbol of the PSSCH (denoted as n)^ending). E.g. the number of the ending OFDM symbol of the psch within one slot.

Set of OFDM symbols occupied by the PSSCH (denoted C)_T)。

The number (denoted as L) of the psch frequency domain resource allocation units occupied by the psch.

The number (denoted as m) of the initial PSSCH frequency domain resource allocation unit occupied by the PSSCH^starting)。

The number (denoted as m) of the PSSCH frequency domain resource allocation unit which is occupied by the PSSCH and ends the PSSCH^ending)。

Set of PSSCH frequency-domain resource allocation units (denoted as C) occupied by the PSSCH_F)。

For example, S is optionally determined by any one of the following:

s is directly indicated by the time domain resource allocation.

·S＝S₁+S₂；

·S＝S₁；

·S＝S₂；

The value of S depends on the case of frequency domain resource allocation. For example, if L ═ L₁If S is equal to S₂，

Otherwise S is S₁+S₂. As another example, if L ₂0, then S ═ S₂Otherwise, S is equal to S₁+S₂. As another example, alternatively, n ^startingIs determined by any one of the following:

·n^startingis directly indicated by the time domain resource allocation.

·n^starting＝n₁。

·n^starting＝n₁+S₁。

·n^startingThe value of (c) depends on the frequency domain resource allocation. For example, if L ═ L₁Then, then

n^starting＝n₁+S₁Else n^starting＝n₁. As another example, if L₂When the value is equal to 0, then

n^starting＝n₁+S₁Else n^starting＝n₁。

As another example, alternatively, n^endingIs determined by any one of the following:

·n^ending＝n₁+S₁+S₂-1。

·n^ending＝n₁+S₁-1。

·n^ending＝n₁+S₂-1。

as another example, optionally C_TIs determined by any one of the following:

·C_T＝{n^starting，n^starting+1，...，n^starting+(S₁+S₂)-1}。

·C_T＝{n^starting，n^starting+1，...，n^starting+S₁-1}。

·C_T＝{n^starting，n^starting+1，...，n^starting+S₂-1}。

·C_Tthe value of (c) depends on the frequency domain resource allocation. For example, if L ═ L₁Then, then

C_T＝{n^starting，n^starting+1，...，n^starting+S₂-1}, otherwise

C_T＝{n^starting，n^starting+1，...，n^starting+(S₁+S₂) -1}. In another example of this application, a,

if L is₂When the value is 0, then C_T＝{n^starting，n^starting+1，...，n^starting+S₂-1}，

Otherwise C_T＝{n^starting，n^starting+1，...，n^starting+(S₁+S₂)-1}。

·C_T＝

{n^ending-(S₁+S₂)+1，n^ending-(S₁+S₂)+2，...，n^ending}。

·C_T＝{n^ending-S₁+1，n^ending-S₁+2，...，n^ending}。

·C_T＝{n^ending-S₂+1，n^ending-S₂+2，...，n^ending}。

As another example, L is optionally determined by any one of the following:

l is directly indicated by the frequency domain resource allocation.

·

·

·

·

·L＝L₁。

·L＝L₁+L₂。

As another example, alternatively, m^startingIs determined by any one of the following:

·m^starting＝m₁。

·

·

·

·

·

·

·

·

·

·

·m^starting＝m₁+D。

·

·

·

·

·

·

·

·

·

·

·m^starting＝m₁-D。

·

·

·

·

·

·

·

·

·

·

as another example, optionally C_FIs determined by any one of the following:

·

·

·

·

·C_F＝{m^starting，m^starting+1，...，m^starting+L₁-1}。

optionally, in a first embodiment of the present invention, the time domain resource allocation and the frequency domain resource allocation may be jointly indicated in a same SCI field.

Optionally, in the first embodiment of the present invention, whether the SCI indicates that the time domain resource allocation may be configured in a semi-static manner. For example, in the provisioning information, or by RRC signaling (e.g., in the MIB, or in the SIB), or by PC5RRC signaling (e.g., in the MIB-SL). Wherein the content of the first and second substances,

Optionally, if the time domain resource allocation is not indicated in the SCI, the number of the starting OFDM symbol of the PSCCH is equal to the number of the starting OFDM symbol of the PSCCH (i.e. n)^starting＝n₁)。

Optionally, if the time domain resource allocation is not indicated in the SCI, the set of OFDM symbols occupied by the PSCCH (e.g., OFDM symbols occupied by the PSCCH in one slot) is equal to the set of OFDM symbols occupied by the PSCCH (e.g., OFDM symbols occupied by the PSCCH in one slot).

Optionally, if the time domain resource allocation is not indicated in the SCI, the set of OFDM symbols occupied by the psch (e.g., OFDM symbols occupied by the psch in a slot) is equal to the set of OFDM symbols left in the slot excluding all OFDM symbols not used for the psch in the slot where the PSCCH is located. Wherein the all OFDM symbols not used for the PSSCH may include one or more of:

OFDM symbols for AGC (Automatic Gain Control).

OFDM symbols for GP (Guard Period, Guard interval).

OFDM symbols that do not belong to the resource pools corresponding to the PSCCH and the PSSCH.

Alternatively, in the first embodiment of the present invention,

and can be written as (m)₁·K_PSCCH)/K_PSSCH。

Thus, in the first embodiment of the present invention, by using the multiplexing mode of the PSCCH and the PSCCH in the time domain and/or the frequency domain, the time domain and/or the frequency domain resources of the PSCCH scheduled by the SCI carried in the PSCCH are indicated with less overhead, which improves the performance of the PSCCH compared with the conventional method.

[ example two ]

The method performed by the user equipment according to the second embodiment of the present invention is described below with reference to fig. 3.

As shown in fig. 3, in the second embodiment of the present invention, the steps performed by the user equipment UE include: step S301 and step S303.

Specifically, in step S301, configuration information about time domain resources of the SL carrier is acquired.

Wherein the content of the first and second substances,

optionally, the configuration information related to the time domain resource of the SL carrier may include one or more of the following:

SL slot bitmap. Wherein the content of the first and second substances,

optionally, the size (or width or length, denoted B) of the SL slot bitmap_SL) May be a bit.

Optionally, the size of the SL slot bitmap may be predefined as any one of the set S1 ═ {1, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64}, or configured or preconfigured or indicated as taking values from any subset of the set S1.

Optionally, a value or a set of values of the size of the SL slot bitmap may be related to the subcarrier spacing and/or CP length configured for the SL carrier. For example, different subcarrier spacings and/or CP lengths correspond to different values or value sets of the size of the SL slot bitmap.

SL originating (starting) OFDM symbol (denoted n)^starting). Wherein the content of the first and second substances,

optionally, the value of the SL starting OFDM symbol is the number of OFDM symbols within one slot.

Optionally, the SL starting OFDM symbol may be predefined as any one of the set S2 ═ {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, or configured or preconfigured or indicated to take values from any subset of the set S2.

Optionally, a value or a set of values of the SL starting OFDM symbol may be related to a subcarrier spacing and/or a CP length configured for the SL carrier. For example, different subcarrier spacings and/or CP lengths correspond to different values or value sets of SL starting OFDM symbols.

SL ends (ending) OFDM symbol (denoted n)^ending). Wherein the content of the first and second substances,

optionally, the value of the SL end OFDM symbol is the number of OFDM symbols within one slot.

Optionally, the SL end OFDM symbol may be predefined as any one of the set S3 ═ {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, or configured or preconfigured or indicated to take values from any subset of the set S3.

Optionally, a value or a set of values of the SL end OFDM symbol may be related to a subcarrier spacing and/or a CP length configured for the SL carrier. For example, different subcarrier intervals and/or CP lengths correspond to different values or value sets of SL-terminated OFDM symbols.

SL time domain resource period (denoted as T)_SL). Wherein the content of the first and second substances,

alternatively, the unit of the SL time domain resource period may be one or more symbols.

Alternatively, the unit of the SL time domain resource period may be one or more slots.

Optionally, the unit of the SL time domain resource period may be one or more subframes.

Alternatively, the unit of the SL time domain resource period may be one or more frames.

Alternatively, the unit of the SL time domain resource period may be one or more milliseconds.

Optionally, the SL time-domain resource period may be identical to the period of the S-SSB (alternatively referred to as SL SSB) (denoted as T)_S-SSB) It is related. For example,

T_SL＝k₁·T_S-SSBwherein k is₁Is an integer, or 1/k₁Is an integer.

Optionally, the SL time domain resource period may be related to the size of the SL slot bitmap. E.g. T_SL＝k₂·B_SLWherein k is₂Is an integer.

Optionally, the SL time domain resource period may be predefined as any one of the set S4 ═ 0.25, 0.5, 0.625, 1, 1.25, 2, 2.5, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 22, 24, 25, 26, 28, 30, 32, 34, 35, 36, 38, 40, 42, 44, 45, 46, 48, 50, 52, 54, 55, 56, 58, 60, 62, 64, 65, 70, 75, 80, 85, 90, 100, or configured or preconfigured or indicated to take values from any subset of the set S4.

Optionally, in said set S1, non-integer values only apply if the unit of said SL time domain resource period is milliseconds.

Optionally, the set of values of the SL time domain resource period may relate to a subcarrier spacing and/or a CP length configured for the SL carrier. For example, different subcarrier intervals and/or CP lengths correspond to different values or value sets of SL time domain resource periods.

Optionally, in the configuration information related to the time domain resource of the SL carrierE.g., the SL slot bitmap, again the SL starting OFDM symbol, again the SL time domain resource period, again the k₁As also said k₂) May be from the UE (e.g., predefined information or pre-configured information or default configuration information of the UE), may be from a base station (e.g., a gNB or eNB), or may be from other UEs (e.g., MIB-SL transmitted by other UEs).

Optionally, any of the configuration information related to the time domain resources of the SL carrier (e.g., the SL slot bitmap, as well as the SL starting OFDM symbol, as well as the SL time domain resource period, as well as the k₁As also said k₂) May be included in an RRC message or a PC5RRC message (e.g., MIB, such as SIB, such as MIB-SL, such as pre-configuration information, such as default configuration information, such as other RRC messages, such as other PC5RRC messages), may also be included in the MAC CE, may also be included in Downlink Control Information (DCI), or may also be included in the direct control information (SCI).

Further, in step S303, the time domain resource of the SL carrier is determined.

For example, the SL slots of the SL carrier are determined from the SL slot bitmap. For example, the SL slot bitmap is periodically applied to a set of slots of the SL carrier. Wherein the content of the first and second substances,

optionally, the period may be equal to the SL time domain resource period (T)_SL)。

Optionally, the set of start times (in units of the SL time domain resource periods) of each of the periods may be {0, T }_SL，2T_SL，...，Is also S-SSB

(or S-SSB candidates) or a subset thereof.

As another example, it may be determined that the set of OFDM symbols for SL may be { n } in all SL slots of the SL carrier^starting，n^starting+1，...，n^ending}。

Optionally, in the second embodiment of the present invention, one or more OFDM symbols in the SL slot may be used for SL.

Optionally, in the second embodiment of the present invention, the SL may be used for SL transmission, or for SL reception, or for AGC on SL, or for GP on SL, or for other uses related to SL.

Thus, the embodiment of the invention ensures that the understanding of time domain resources of corresponding SL carriers among different UEs is consistent through indicating information such as SL time slot bitmaps and SL initial OFDM symbols in messages such as MIB-SL, and ensures the synchronization of the different UEs in time during SL transmission and SL reception.

[ third example ]

The method performed by the user equipment according to the third embodiment of the present invention is described below with reference to fig. 4.

As shown in fig. 4, in a third embodiment of the present invention, the steps performed by the user equipment UE include: step S401, step S403, and step S405.

Specifically, in step S401, a PSCCH and a PSCCH scheduled by a direct Sequence Control Information (SCI) carried by the PSCCH are received.

Further, in step S403, a propagation type (cast-type, or communication type) is determined. Wherein the propagation type may be a propagation type of any one or more of the PSCCH, the SCI, the psch, and a transport block carried by the psch.

For example, it is determined whether the propagation type is unicast or multicast. As another example, a determination is made as to whether the propagation type is unicast or broadcast. As another example, it is determined whether the propagation type is multicast or broadcast. As another example, it is determined whether the propagation type is unicast, multicast, or broadcast.

Optionally, a propagation type is defined only for one or more of the PSCCH, the SCI, the psch, and transport blocks carried by the psch.

Optionally, the PSCCH, the SCI, the psch, and transport blocks carried by the psch (where applicable, for example, where a propagation type is defined) correspond to the same propagation type.

Optionally, the manner of determining the propagation type may be any one of the following:

determining the propagation type according to frequency domain and/or time domain resources occupied by the PSCCH and/or the PSCCH. For example, the propagation type is broadcast if the resource pool to which the PSCCH and/or PSCCH belongs is configured for broadcast transmission only.

-determining the propagation type from the DMRS sequence used by the PSCCH.

-determining the propagation type from the DMRS sequence used by the psch.

-determining the propagation type according to the geographical area (zone) in which the UE is located. The propagation type is determined, for example, from an area Identification (ID) of a geographical area in which the UE is located.

Determining the propagation type from the propagation type indication in the SCI. The propagation type indication may be an explicit indication (e.g., directly indicated by one or more fields in the SCI) or an implicit indication (e.g., derived from one or more fields in the SCI).

Determining the propagation type according to the format of the SCI.

Determine the propagation type according to other means.

Further, the propagation type is indicated (or reported) by the physical layer to the higher layer (e.g., the MAC sublayer) at step S405.

Thus, the embodiment of the invention reports the transmission type of the received transmission block to the MAC sublayer through the physical layer, so that the receiving UE can definitely distinguish unicast transmission and multicast transmission under the condition of configuring HARQ feedback, thereby avoiding carrying out HARQ combination on the received transmission block for unicast and the received transmission block for multicast and ensuring the performance of HARQ combination.

[ example four ]

The method performed by the user equipment according to the fourth embodiment of the present invention is described below with reference to fig. 5.

As shown in fig. 5, in the fourth embodiment of the present invention, the steps performed by the user equipment UE include:

step S501 and step S503.

Specifically, in step S501, the straight line control information (SCI) is received. Wherein the content of the first and second substances,

optionally, the SCI may be carried in a PSCCH, which may be used to schedule a PSCCH, which may carry one transport block. Wherein the content of the first and second substances,

Optionally, the transport block may be transmitted one or more times. Recording the transmission block

The number of transmissions of (2) is N.

Optionally, the N may also be referred to as the maximum number of transmissions of the transport block, or the maximum possible number of transmissions of the transport block. Optionally, the actual number of transmissions of the transport block may be less than N.

Optionally, the value set of N may be set S1 ═ {1, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 68, 72, 76, 80, 84, 88, 92, 96, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 144, 148, 152, 156, 160, 164, 168, 172, 176, 180, 184, 188, 192, 196, 200, 204, 208, 212, 216, 220, 224, 228, 232, 236, 240, 244, 248, 252, 256} or any subset of the set S1.

Optionally, the number of N transmissions of the transport block may start from 0, e.g. the 1 st transmission is called "transmission 0", the second transmission is called "transmission 1", etc. Accordingly, the set of numbers for N transmissions of the transport block is {0, 1.

Optionally, the set of numbers of actual transmissions of the transport block may be a subset of {0, 1., N-1}, e.g., if N ═ 4, the number of actual transmissions of the transport block may be {0, 1, 2, 3}, or {0, 1}, or {0, 2}, etc.

Optionally, each transmission of the transport block corresponds to a unique PSCCH, SCI and PSCCH, respectively. Noting that the transmission number of the transmission block carried by the PSSCH scheduled by the SCI carried by the PSCCH is i, the PSCCH, the SCI and the PSSCH can be respectively recorded as PSCCH_i、SCI_iAnd PSSCH_iWhere i ∈ {0, 1, 2.,. N-1 }.

Alternatively, sometimes the transmission with the transport block number 0 is called initial transmission (initial transmission), and the other subsequent transmissions (if any) are called retransmission (retransmission). For example, a transmission numbered 1 of the transport block may also be referred to as a 1 st retransmission of the transport block, a transmission numbered 2 of the transport block may also be referred to as a 2 nd retransmission of the transport block, and so on.

Optionally, the SCI_iMay indicate any one or more of the following:

the PSSCH_iTime and/or frequency domain resources.

PSSCH carrying the next transmission of the transport block (i.e., PSSCH)_i+1) Time and/or frequency domain resources.

Optionally, only if i is odd at the SCI_iIndicating the PSSCH_i+1Time and/or frequency domain resources.

Optionally, only when i is even, then at the SCI _iIndicating the PSSCH_i+1Time and/or frequency domain resources.

Optionally, for a portion of the predefined, preconfigured or configured set of values of i (e.g., a subset of odd-numbered components in {0, 1, 2.., N-1}, such as a subset of even-numbered components in {0, 1, 2.., N-1}, such as { N-1}), the SCI_iThe PSSCH indicated in_i+1Is a predefined, pre-configured or configured special value (e.g. a null value, as well as an illegal value). For example, when the SCI is present_iFor indicating the PSSCH_i+1All bits of the field of the time and/or frequency domain resource have a value of 0, or all have a value of 01. As another example, at this time the SCI_iFor indicating the PSSCH_i+1The value of the field of the time domain and/or frequency domain resource corresponds to any one of the states of the special (e.g., empty, and illegal) time domain and/or frequency domain resource allocation.

Carrying PSSCH of last transmission of the transport block (i.e., PSSCH)_i-1) Time and/or frequency domain resources.

Optionally, only if i is odd at the SCI_iIndicating the PSSCH_i-1Time and/or frequency domain resources.

Optionally, only if i is even and i ≠ 0 (or i > 0) at the SCI _iIndicating the PSSCH_i-1Time and/or frequency domain resources.

Optionally, for a portion of a predefined, preconfigured or configured set of values of i (e.g., a subset of odd-numbered components in {0, 1, 2.., N-1}, such as a subset of even-numbered components in {0, 1, 2.., N-1}, such as { N-1}), the SCI_iThe PSSCH indicated in_i-1Is a predefined, pre-configured or configured special value (e.g. a null value, as well as an illegal value). For example, when the SCI is present_iFor indicating the PSSCH_i-1All bits of the field of the time and/or frequency domain resource take values of 0 or 1. As another example, at this time the SCI_iFor indicating the PSSCH_i-1The value of the field of the time domain and/or frequency domain resource corresponds to any one of the states of the special (e.g., empty, and illegal) time domain and/or frequency domain resource allocation.

Inverse transmission number (denoted as j)₁). E.g. j₁N-i-1. For example,

transmission numbers

0, 1, … …, N-1 correspond to reverse transmission numbers N-1, N-2, … …, 0, respectively.

Optionally, j₁May also be used to indicate the number of remaining transmissions, e.g. in the PSSCH_iAfter the end of the transmission, the number of times the transport block needs to be (or possibly, or at most, needs to be) transmitted is also needed. For example, if N is 4, then the message is sent SCI (i.e., SCI) corresponding to transmission of transport blocks numbered 0, 1, 2, and 3, respectively₀、SCI₁、SCI₂And SCI₃) The indicated values of the remaining number of transmissions are equal to 3, 2, 1, 0, respectively. For another example, if N is 1, the transmission with number 0 of the transport block (which is also a unique primary transmission) corresponds to SCI (i.e., SCI)₀) The value of the indicated remaining number of transmissions is equal to 0.

Reverse transmission pair (transmission pair) number (denoted as j)₂). For example,

in another example of this application, a,

(i.e., the reverse transmission pair number is indicated by the reverse transmission number). Wherein the content of the first and second substances,

optionally, if N > 1, the transmissions numbered 2N and 2N +1, respectively, of the transport block constitute a transmission pair numbered N of the transport block, wherein

For example,

transmission numbers

0, 1, 2, 3, … …, N-2, N-1 correspond to reverse transmission pair numbers, respectively

Wherein the content of the first and second substances,

optionally, N is always even at this time.

Optionally, if i is odd, the transmission of the transport block numbered i-1 and i, respectively, constitutes the th of the transport block

And a transmission pair.

Optionally, if i is an even number, the transmissions of the transport block numbered i and i +1, respectively, constitute the th of the transport block

And a transmission pair.

Optionally, if N ═ 1, then the transmission numbered 0 of the transport block is the "transmission pair" numbered 0 of the transport block. Alternatively, it may also be considered that no transmission pair exists at this time.

Optionally, j₂It can also be used to indicate the number of remaining transmission pairs, e.g. at the transport block number

(if said i is an odd number) or

The number of transmission pairs that the transport block needs to (or may also, or may at most) transmit after the end of the transmission pair (if i is an even number). For example, if N is 4, the

transmission numbers

0, 1, 2 and 3 in the transport block correspond to SCIs (i.e., SCIs) respectively₀、SCI₁、SCI₂And SCI₃) The indicated number of remaining transmission pairs has values equal to 1, 0, respectively. For another example, if N is 1, the transmission with number 0 of the transport block (which is also a unique primary transmission) corresponds to SCI (i.e., SCI)₀) The value of the indicated number of remaining transmission pairs is equal to 0.

The transport block identifier. Wherein the value of the transport block identifier is set to SCI (i.e. SCI) corresponding to all N transmissions of the transport block₀、SCI₁、......、SCI_N-1) The same as in (1).

Initial redundancy version (RV, denoted as r)₀). For example, the redundancy version for the transmission of the transport block number 0.

Wherein the content of the first and second substances,

alternatively, the PSSCH_i+1And the PSSCH _i-1The time domain and/or frequency domain resources of can be in the same SCI wordIndicated in the section. For example, when the i is even, the SCI field indicates the PSSCH_i+1Time and/or frequency domain resources of; the SCI field indicates the PSSCH when the i is odd_i-1Time and/or frequency domain resources.

Alternatively, the PSSCH_iTime and/or frequency domain resource of said PSSCH_i+1Time and/or frequency domain resource of said PSSCH_i-1Any one of the time and/or frequency domain resource of (i), the "reverse transmission number", the "remaining number of transmissions", the "reverse transmission pair number", the "number of remaining transmission pairs", and the "transport block identifier" may be indicated by one field of the SCI, may be indicated by a part of bits of one field of the SCI, may be indicated by a part of values of one field of the SCI, or may be indicated by a plurality of fields of the SCI.

In addition, in step S503, information about the transport block carried by the psch is determined according to the SCI. For example, information related to HARQ feedback is determined. For example, one or more of the following are determined:

The PSSCH_iWhether it corresponds to the last transmission of the transport block.

For example, if the remaining number of transmissions is 0, the PSSCH_iIs the last transmission of the transport block.

In another example, if the reverse transmission number is 0, the PSSCH is assigned_iIs the last transmission of the transport block.

Another example is if the SCI_iThe PSSCH indicated in_i+1Is a predefined, pre-configured or configured special value (e.g. null value, also e.g. illegal value), then the psch_iIs the last transmission of the transport block.

Another example is if the SCI_iThe PSSCH indicated in_i-1Is a predefined, pre-configured or configured special value (e.g. a null value, as well asIllegal value), then the PSSCH_iIs the last transmission of the transport block.

Another example is any combination of the above examples.

The PSSCH_iPosition in the corresponding transmission pair.

For example, if the remaining number of transmissions is even, then the PSSCH_iIs the first transmission in the corresponding transmission pair.

Another example is that if the remaining number of transmissions is odd, then the psch_iIs the second transmission in the corresponding transmission pair.

Another example is that if the remaining number of transmissions is odd, then the psch_iIs the first transmission in the corresponding transmission pair.

Another example is that if the remaining number of transmissions is even, then the psch_iIs the second transmission in the corresponding transmission pair.

The PSSCH_iTime and/or frequency domain resources.

The PSSCH_i+1Time and/or frequency domain resources.

The PSSCH_i-1Time and/or frequency domain resources.

The PSSCH_iThe corresponding transport block. For example, the PSSCH is determined by the transport Block identifier_iThe corresponding transport block.

The PSSCH_iThe PSSCH_i+1And the PSSCH_i-1Respectively, corresponding to one or more of the redundancy versions.

For example, the PSSCH_iThe corresponding redundancy version is

In another example, the PSSCH_iThe corresponding redundancy version is

In another example, the PSSCH_iThe corresponding redundancy version is

In another example, the redundancy version corresponding to PSSCHi is

In another example, the PSSCH_iThe corresponding redundancy version is

In another example, the PSSCH_iThe corresponding redundancy version is

Another example is if the PSSCH_iIs the first transmission in the corresponding transmission pair, then the PSSCH_iThe corresponding redundancy version is 0.

Another example is if the PSSCH_iIs the second transmission in the corresponding transmission pair, then the PSSCH _iThe corresponding redundancy version is 2.

If the PSSCH, for example_iIs the first transmission in the corresponding transmission pair, then the PSSCH_iThe corresponding redundancy version is 3.

Another example is if the PSSCH_iIs the second transmission in the corresponding transmission pair, then the PSSCH_iThe corresponding redundancy version is 1.

Wherein the content of the first and second substances,

○A₀＝0，A₁＝2，A₂＝3，A₃＝1。

○r₀＝A_t，t∈{0，1，2，3}。

thus, the embodiment of the invention enables the receiving UE to correctly distinguish which received PSSCHs carry different transmissions of the same transport block and/or correctly deduce redundancy versions corresponding to the different transmissions by means of the information of the transmissions corresponding to the different transmission numbers of the chain indication transport block in the SCI, thereby ensuring the performance of HARQ merging.

[ modified examples ]

As a modification, a user equipment capable of executing the method performed by the user equipment described in detail above of the present invention is explained below with reference to fig. 6.

Fig. 6 is a block diagram showing a user equipment UE according to the present invention.

As shown in fig. 6, the user equipment UE60 includes a processor 601 and a memory 602. The processor 601 may include, for example, a microprocessor, a microcontroller, an embedded processor, or the like. The memory 602 may include, for example, volatile memory (e.g., random access memory RAM), a Hard Disk Drive (HDD), non-volatile memory (e.g., flash memory), or other memory, among others. The memory 602 has stored thereon program instructions. Which when executed by the processor 601 may perform the above-described method performed by the user equipment as described in detail herein.

The method of the invention and the apparatus involved have been described above in connection with preferred embodiments. It will be appreciated by those skilled in the art that the above illustrated approaches are exemplary only, and that the various embodiments described above can be combined with each other without conflict. The method of the present invention is not limited to the steps or sequence shown above. The network nodes and user equipment shown above may comprise further modules, e.g. modules that may be developed or developed in the future, which may be available to a base station, MME, or UE, etc. The various identifiers shown above are exemplary only and not limiting, and the invention is not limited to the specific information elements that are examples of these identifiers. Many variations and modifications may occur to those skilled in the art in light of the teachings of the illustrated embodiments.

It should be understood that the above-described embodiments of the present invention can be implemented by software, hardware, or a combination of both software and hardware. For example, various components within the base station and the user equipment in the above embodiments may be implemented by various means, including but not limited to: analog circuit devices, Digital Signal Processing (DSP) circuits, programmable processors, Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), programmable logic devices (CPLDs), and the like.

In this application, a "base station" may refer to a mobile communication data and control switching center with a large transmission power and a wide coverage area, and includes functions of resource allocation scheduling, data receiving and transmitting, and the like. "user equipment" may refer to a user mobile terminal, including, for example, a mobile phone, a notebook, etc., which may wirelessly communicate with a base station or a micro base station.

Furthermore, embodiments of the invention disclosed herein may be implemented on a computer program product. More specifically, the computer program product is one of the following: there is a computer readable medium having computer program logic encoded thereon that, when executed on a computing device, provides related operations for implementing the above-described aspects of the present invention. When executed on at least one processor of a computing system, the computer program logic causes the processor to perform the operations (methods) described in embodiments of the present invention. Such arrangements of the invention are typically provided as downloadable software images, shared databases, etc. arranged or encoded in software, code and/or other data structures on a computer readable medium such as an optical medium (e.g., CD-ROM), floppy or hard disk or other medium such as firmware or microcode on one or more ROM or RAM or PROM chips or in one or more modules. The software or firmware or such configurations may be installed on a computing device to cause one or more processors in the computing device to perform the techniques described in embodiments of the present invention.

Further, each functional block or respective feature of the base station device and the terminal device used in each of the above embodiments may be implemented or executed by a circuit, which is typically one or more integrated circuits. Circuitry designed to perform the various functions described in this specification may include a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC) or a general purpose integrated circuit, a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, or discrete hardware components, or any combination thereof. A general-purpose processor may be a microprocessor, or the processor may be an existing processor, controller, microcontroller, or state machine. The general-purpose processor or each circuit described above may be configured by a digital circuit, or may be configured by a logic circuit. Further, when advanced technology capable of replacing the current integrated circuit is developed due to the advancement of semiconductor technology, the present invention can also use the integrated circuit obtained by the advanced technology.

Although the present invention has been described in conjunction with the preferred embodiments thereof, it will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention. Accordingly, the present invention should not be limited by the above-described embodiments, but should be defined by the appended claims and their equivalents.

Claims

1. A method performed by a user device, comprising:

receiving direct-line control information SCI carried by a physical direct-line control channel PSCCH; and

and determining the time domain and/or frequency domain resource allocation of the physical straight-line shared channel PSSCH scheduled by the PSCCH according to the SCI.

2. The method of claim 1,

the SCI indicates any one or more of the following:

a time domain resource allocation indicating a time domain resource allocated for the PSSCH; and

a frequency domain resource allocation indicating frequency domain resources allocated for the PSSCH.

3. The method of claim 2,

the time domain resource allocation includes one or more of:

the number S of all OFDM symbols allocated to the PSSCH;

number n of starting OFDM symbol of the PSSCH^starting(ii) a And

number S of OFDM symbols allocated for the PSSCH but not allocated for the PSCCH₂。

4. The method of claim 3,

the frequency domain resource allocation comprises one or more of:

the number L of PSSCH frequency domain resource allocation units occupied by the PSSCH; and

PSSCH-specific frequency-domain resource allocation L ₂。

5. The method of claim 4,

the determined time and/or frequency domain resource allocation of the PSSCH includes one or more of:

the number S of OFDM symbols occupied by the PSSCH;

number n of starting OFDM symbol of the PSSCH^starting；

Number n of the PSSCH's ending OFDM symbol^ending；

Set C of OFDM symbols occupied by the PSSCH_T；

The number L of PSSCH frequency domain resource allocation units occupied by the PSSCH;

the number m of the initial PSSCH frequency domain resource allocation unit occupied by the PSSCH^starting；

The number m of the PSSCH frequency domain resource allocation unit which is occupied by the PSSCH and ends the PSSCH^ending(ii) a And

set C of PSSCH frequency domain resource allocation unit occupied by PSSCH_F。

6. The method of claim 5,

s is determined by any one of the following:

s is directly indicated by the time domain resource allocation;

·S＝S₁+S₂；

·S＝S₁；

·S＝S₂，

wherein S is₁Is the number of OFDM symbols occupied by the PSCCH.

7. The method of claim 5,

n^startingis determined by the following means:

·n^startingdirectly indicated by the time domain resource allocation;

·n^starting＝n₁；

·n^starting＝n₁+S₁，

8. The method of claim 5,

L is determined by any one of the following:

l is directly indicated by the frequency domain resource allocation;

·

·

·

·

·L＝L₁，

R₂＝L′₂mod 2, or R₂＝(L-L′₂) mod 2, wherein L'₂The number of PSSCH frequency domain resource allocation units which are not overlapped with the frequency domain resource occupied by the PSSCH, L in the set of PSSCH frequency domain resource allocation units occupied by the PSSCH₁Is the number of PSCCH frequency domain resource allocation units occupied by the PSCCH,

K_PSSCHis the psch frequency domain resource allocation unit,

K_PSCCHis the PSCCH frequency domain resource allocation unit.

9. The method of claim 5,

m^startingis determined by any one of the following:

·m^starting＝m_i；

·