CN112291846A

CN112291846A - Method performed by user equipment and user equipment

Info

Publication number: CN112291846A
Application number: CN201910669618.XA
Authority: CN
Inventors: 赵毅男; 刘仁茂; 罗超
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2021-01-29
Also published as: WO2021013213A1

Abstract

The invention provides a method executed by user equipment and the user equipment, wherein the method comprises the following steps: determining configuration information of sideline communication sidelink; receiving a physical sidelink communication control channel PSCCH (physical sidelink communication control channel) carrying sidelink communication control information SCI (communication control information) sent by other user equipment; determining the total number of Resource Elements (REs) of a physical sidelink communication shared channel (PSSCH) corresponding to the PSCCH according to the received 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

In a conventional cellular network, all communications must pass through the base station. In contrast, D2D communication (Device-to-Device communication, direct Device-to-Device communication) refers to a communication method in which two user devices communicate directly without forwarding through a base station or a core network. The research topic on the realization of the D2D-adjacent communication service by LTE devices was approved at RAN #63 of 3rd Generation Partnership Project (3 GPP) in 2014 (see non-patent document 1). Functions introduced by LTE Release 12D 2D include:

1) discovery function (Discovery) between adjacent devices in an LTE network coverage scenario;

2) a direct Broadcast communication (Broadcast) function between neighboring devices;

3) the higher layer supports Unicast (Unicast) and multicast (Groupcast) communication functions.

On the 3GPP RAN #66 congress of 12 months in 2014, the research project of enhanced LTE eD2D (enhanced D2D) was approved (see non-patent document 2). The main functions introduced by LTE Release 13 eD2D include:

1) D2D discovery of no-network coverage scenarios and partial-network coverage scenarios;

2) priority handling mechanism for D2D communications.

Based on the design of the D2D communication mechanism, the V2X feasibility study topic based on D2D communication was approved at the RAN #68 time congress of 3GPP at 6 months 2015. V2X shows that Vehicle to evolution is expected to realize the interaction between Vehicle and all entity information that may affect the Vehicle, in order to reduce accident, slow down traffic jam, reduce environmental pollution and provide other information services. The application scenario of V2X mainly includes 4 aspects:

1) V2V, Vehicle to Vehicle, i.e. Vehicle-to-Vehicle communication;

2) V2P, Vehicle to peer, i.e. the Vehicle sends a warning to pedestrians or non-motor vehicles;

3) V2N, Vehicle to Network, i.e. Vehicle connected mobile Network;

4) V2I, Vehicle to Infrastructure, i.e. the Vehicle communicates with road Infrastructure etc.

The 3GPP has divided the research and standardization work of V2X into 3 stages. The first phase was completed in 2016 and 9 months, mainly focusing on V2V, and was formulated based on LTE Release 12 and Release 13D 2D (also called sidelink communication), i.e., proximity communication technology (see non-patent document 3). V2X stage 1 introduced a new D2D communication interface, called PC5 interface. The PC5 interface is mainly used to solve cellular internet of vehicles communication problems in high speed (up to 250 km/h) and high node density environments. The vehicles can interact with information such as position, speed and direction through the PC5 interface, i.e., the vehicles can communicate directly with each other through the PC5 interface. Compared with the proximity communication between D2D devices, the functions introduced by LTE Release 14V 2X mainly include:

1) higher density DMRS to support high speed scenarios;

2) introducing a sub-channel (sub-channel) to enhance a resource allocation mode;

3) a user equipment aware (sensing) mechanism with semi-persistent scheduling (semi-persistent) is introduced.

The second stage of the research topic of V2X belongs to the research category of LTE Release 15 (see non-patent document 4), and the introduced main characteristics include high-order 64QAM modulation, V2X carrier aggregation, short TTI transmission, and feasibility research of transmit diversity.

At the 3GPP RAN #80 congress of 6 months in 2018, the corresponding third stage was approved based on the V2X feasibility study topic of 5G NR network technology (see non-patent document 5).

In the conference of 3GPP RAN1#95 in 11 months in 2018 (see non-patent document 6), the following conference conclusions are reached regarding the multiplexing of PSCCH and PSCCH in NR sidelink:

for the case of CP-OFDM waveform, at least option3 is supported as the multiplexing mode of PSCCH and PSSCH. Among them, in a conference of 3GPP RAN1#94 in 8 months in 2018 (see non-patent document 7), the description about the PSCCH and PSCCH multiplexing mode option3 is as follows:

■ Option 3: a portion of the PSCCH and corresponding (or associated) PSCCH are transmitted on overlapping time domain resources that use different frequency domain resources. The other part of the PSCCH and/or the PSCCH corresponding to the other part are transmitted on non-overlapping time domain resources.

The scheme of the invention mainly comprises a method for determining the number of available REs for transmitting PSSCH by NR side user equipment for mobile communication.

Documents of the prior art

Non-patent document

Non-patent document 1: RP-140518, Work item deployment on LTE Device to Device Proximity Services

Non-patent document 2: RP-142311, Work Item Proposal for Enhanced LTE Device to Device Proximity Services

Non-patent document 3: RP-152293, New WI propofol: support for V2V services based on LTE sidelink

Non-patent document 4: RP-170798, New WID on3GPP V2X Phase 2

Non-patent document 5: RP-181480, New SID Proposal: study on NR V2X

Non-patent document 6: RAN1#95, Charrman notes, section 7.2.4.1.2

Non-patent document 7: RAN1#94, Charrman notes, section 7.2.4.1.2

Disclosure of Invention

To address at least some of the above issues, the present invention provides a method performed by a user equipment and a user equipment.

A method performed by a user equipment according to the first aspect of the invention comprises: determining configuration information of sideline communication sidelink; receiving a physical sidelink communication control channel PSCCH (physical sidelink communication control channel) carrying sidelink communication control information SCI (communication control information) sent by other user equipment; determining the total number of Resource Elements (REs) of a physical sidelink communication shared channel (PSSCH) corresponding to the PSCCH according to the received SCI

A method performed by a user equipment according to the second aspect of the invention, comprising: determining configuration information of sideline communication sidelink; receiving a physical sidelink communication control channel PSCCH (physical sidelink communication control channel) carrying sidelink communication control information SCI (communication control information) sent by other user equipment; determining the number of Resource Elements (REs) in each sub-channel of a physical sidelink communication control channel (PSSCH) corresponding to the PSCCH according to the received SCI

According toThe received SCI and/or the

Determining the total number of Resource Elements (REs) of the PSSCH corresponding to the PSCCH

According to the method of the first aspect or the second aspect of the present invention, the configuration information is configuration information sent by a base station through radio resource control, RRC, signaling; or the configuration information is contained in the pre-configuration information of the user equipment, and the configuration information only contains the configuration information of the resource pool, or the configuration information contains the configuration information of the resource pool, and also contains sidelink configuration information of a non-resource pool, and the configuration information contains: configuration information of sub-channel size of sub-channel

And/or configuration information of the time domain length of the PSCCH

And/or configuration information of frequency domain length of the PSCCH

And/or configuration information of a configuration type of a demodulation reference signal (DMRS); and/or a list of time-domain patterns of a demodulation reference signal (DMRS), or configuration information of the time-domain patterns; and/or configuration information of the number of resource units (REs) occupied by the PSCCH

According to the method of the first or second aspect of the invention, the SCI comprises: indication information of a configuration type of a demodulation reference signal (DMRS); and/or indication information of a time domain pattern of a demodulation reference signal (DMRS); and/or whether the other user equipment sends the indication information of the sidelink communication channel state information reference signal sidelink CSI-RS; and/or the indication information whether the other user equipment triggers the reporting of the sidelink communication channel status sidelink CSI.

The method according to the first or second aspect of the invention, the

Represents a total number of resource elements REs of the PSSCH within one slot.

According to the method of the first aspect of the present invention, the total number of Resource Elements (REs) of a physical sidelink communication shared channel (PSSCH) corresponding to the PSCCH is determined according to the received SCI

The method comprises the following steps: determining a number of Orthogonal Frequency Division Multiplexing (OFDM) symbols of the PSSCH allocation according to the SCI

And/or determining the number of PSSCH assigned subchannels based on the SCI

And/or determining the total number N of Resource Elements (REs) of sidelink communication channel state information reference signal (sidelink CSI-RS) according to the SCI_CSI-RSAccording to said

And/or sub-channel size configuration information

And/or the SCI to determine the total number of Resource Elements (REs) N of the sidelink CSI-RS_CSI-RS(ii) a And/or according to configuration type information of a demodulation reference signal (DMRS), and/or time domain pattern information of the DMRS, and/or the DMRS

And/or the said

To determine a total number N of Resource Elements (REs) of the DMRS_DMRS(ii) a And/or according to said

And/or the said

And/or the said

And/or configuration information of frequency domain length of the PSCCH

And/or configuration information of the time domain length of the PSCCH

And/or said N_DMRSAnd/or the NC_SI-RSAnd/or configuration information of the number of resource units (REs) occupied by the PSCCH

To determine said

According to the method of the second aspect of the invention, the method

Represents the number of resource elements, REs, of the PSSCH within one slot.

According to the method of the second aspect of the present invention, the determining the number of Resource Elements (REs) in each sub-channel of the physical sidelink communication control channel (PSSCH) corresponding to the PSCCH according to the received SCI

The method comprises the following steps: determining the PSSCH allocation based on the SCINumber of OFDM symbols

And/or according to the configuration type information of the DMRS (demodulation reference signal), and/or the time domain pattern information of the DMRS, and/or the configuration information of the sub-channel size of the sub-channel

To determine the number N of resource elements RE within each subchannel of the DMRS_DMRS(ii) a And/or determining the number N of Resource Elements (REs) of sidelink communication channel state information reference signal (sidelink CSI-RS) in each subchannel according to the SCI_CSI-RSAccording to said

And/or the SCI to determine the number N of Resource Elements (REs) of the sidelink CSI-RS in each subchannel_CSI-RS(ii) a And/or according to said

And/or the number of OFDM symbols allocated by the PSSCH

And/or configuration information of the time domain length of the PSCCH

And/or said N_DMRSAnd/or the N_CSI-RSAnd/or configuration information of frequency domain length of the PSCCH

To determine said

According to the method of the second aspect of the present invention, the method further comprises receiving the SCI and/or the SCI

The method comprises the following steps:

determining the number of PSSCH assigned subchannels from the SCI

And/or according to said

And/or the said

To determine said

A user equipment according to a third aspect of the invention, comprising: a processor; and a memory storing instructions; wherein the instructions, when executed by the processor, perform the method of the first or second aspect.

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 schematic diagram illustrating LTE V2X UE sidelink communications.

Fig. 2 is a diagram illustrating a resource allocation scheme of LTE V2X.

Fig. 3 is a diagram illustrating a basic flow of a method performed by a user equipment in the first embodiment of the invention.

Fig. 4 is a diagram illustrating a basic flow of a method performed by a user equipment in embodiment two of the invention.

Fig. 5 is a diagram illustrating a basic flow of a method performed by a user equipment in the third embodiment of the present invention.

Fig. 6 is a diagram showing a basic flow of a method performed by a user equipment in the fourth embodiment of the present invention.

Fig. 7 is a diagram illustrating a basic flow of a method performed by a user equipment in embodiment five of the invention.

Fig. 8 is a diagram showing a basic flow of a method performed by a user equipment in the sixth embodiment of the present invention.

Fig. 9 is a block diagram illustrating a user equipment according to an embodiment of the present invention.

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

LTE: long Term Evolution, Long Term Evolution technology

NR: new Radio, New Wireless, New air interface

PDCCH: physical Downlink Control Channel, Physical Downlink Control Channel

DCI: downlink Control Information, Downlink Control Information

PDSCH: physical Downlink Shared Channel (pdcch)

UE: user Equipment, User Equipment

eNB: evolved NodeB, evolved node B

And g NB: NR base station

TTI: transmission Time Interval, Transmission Time Interval

OFDM: orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing

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

C-RNTI: cell Radio Network Temporary Identifier

CSI: channel State Information, Channel State Information

HARQ: hybrid Automatic Repeat Request (HARQ)

CSI-RS: channel State Information Reference Signal (CSI-RS)

CRS: cell Reference Signal, Cell specific Reference Signal

PUCCH: physical Uplink Control Channel, Physical Uplink Control Channel

PUSCH: physical Uplink Shared Channel, Physical Uplink Shared Channel

UL-SCH: uplink Shared Channel, Uplink Shared Channel

CG: configured Grant, configuring scheduling Grant

Sidelink: sidelink communications

SCI: sidelink Control Information, Sidelink communication Control Information

PSCCH: physical Sidelink Control Channel, Physical Sidelink communication Control Channel

MCS: modulation and Coding Scheme, Modulation and Coding Scheme

RB: resource Block, Resource Block

RE: resource Element, Resource Element

CRB: common Resource Block, Common Resource Block

And (3) CP: cyclic Prefix, Cyclic Prefix

PRB: physical Resource Block, Physical Resource Block

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

FDM: frequency Division Multiplexing, Frequency Division Multiplexing

RRC: radio Resource Control, Radio Resource Control

RSRP: reference Signal Receiving Power, Reference Signal Receiving Power

SRS: sounding Reference Signal

DMRS: demodulation Reference Signal

CRC: cyclic Redundancy Check (crc)

PSDCH: physical Sidelink Discovery Channel

PSBCH: physical Sidelink Broadcast Channel, Physical Sidelink communication Broadcast Channel

SFI: slot Format Indication

TDD: time Division Duplexing

FDD: frequency Division Duplexing

SIB 1: system Information Block Type 1, System Information Block Type 1

SLSS: sidelink synchronization Signal, a side-line communication synchronization Signal

PSSS: primary Sidelink Synchronization Signal, sideline communication Primary Synchronization Signal

SSSS: secondary Sidelink Synchronization Signal, sideline communication auxiliary Synchronization Signal

PCI: physical Cell ID, Physical Cell identity

PSS: primary Synchronization Signal, Primary Synchronization Signal

SSS: secondary Synchronization Signal, Secondary Synchronization Signal

BWP: bandwidth Part, BandWidth fragment/portion

GNSS: global Navigation Satellite positioning System (GNSS)

SFN: system Frame Number, System (radio) Frame Number

DFN: direct Frame Number, Direct Frame Number

IE: information Element, Information Element

And (3) SSB: synchronization Signal Block, synchronous System information Block

EN-DC: EUTRA-NR Dual Connection, LTE-NR Dual connectivity

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

SCG: secondary Cell Group, Secondary Cell Group

PCell: primary Cell, Primary Cell

SCell: secondary Cell, Secondary Cell

PSFCH: physical Sidelink Feedback Channel, Physical Sidelink communication Feedback Channel

SPS: semi-persistent Scheduling, Semi-persistent Scheduling

TA: timing Advance, uplink Timing Advance

The following is a description of the prior art associated with the inventive arrangements. Unless otherwise specified, the meanings of the same terms in the specific examples are the same as those in the prior art.

It is to be noted that V2X referred to in the description of the present invention has the same meaning as sidelink. V2X herein may also represent sidelink; similarly, sidelink herein may also refer to V2X, and is not specifically distinguished or limited hereinafter.

In the description of the present invention, the resource allocation method of V2X (sidelink) communication and the transmission mode of V2X (sidelink) communication may be replaced by equivalent methods. The resource allocation pattern referred to in the specification may indicate a transmission mode, and the transmission mode referred to may indicate a resource allocation pattern.

The PSCCH in the description of the present invention is used to carry SCI. The PSCCH referred to in the description of the present invention is referred to as corresponding PSCCH, or related PSCCH, or scheduled PSCCH, which all have the same meaning and all represent either an associated PSCCH or a associated PSCCH. Similarly, pschs referred to in the description correspond to pschs, or correspond to PSCCHs, or related PSCCHs all have the same meaning, and all refer to associated PSCCHs or corrserving PSCCHs. It is noted that the PSCCH corresponds to, or the corresponding, or associated PSCCH may be one PSCCH, or two PSCCHs. When the PSCCH includes two PSCCHs (or two SCIs), the PSCCH carrying the first-level SCI and the PSCCH carrying the second-level SCI are referred to in the specification of the present patent.

The DMRS (DMRS associated with and for psch) corresponding to the psch referred to in the description of the present invention is used to demodulate the psch. In NR sidelink, the DMRS corresponding to the PSCCH may be used for demodulating one or two PSCCHs corresponding to the PSCCH, or may be used for demodulating only the PSCCH, in addition to the PSCCH.

Scenarios for Sidelink communications

1) Out-of-Coverage (Out-of-Coverage) sidelink communication: neither UE performing sidelink communication has network coverage (e.g., the UE does not detect any cell satisfying the "cell selection criterion" on the frequency on which the sidelink communication is required, indicating that the UE has no network coverage).

2) Network Coverage (In-Coverage) side communication: both UEs performing sidelink communications have network coverage (e.g., the UE detects at least one cell satisfying the "cell selection criteria" on the frequency on which the sidelink communications are desired, indicating that the UE has network coverage).

3) Partial-Coverage (Partial-Coverage) sidelink communications: one of the UEs performing sidelink communication has no network coverage, and the other UE has network coverage.

From the UE side, the UE has only two scenarios, namely, network coverage and non-network coverage. Partial network coverage is described from the perspective of sidelink communications.

Basic procedure for LTE V2X (sidelink) communication

Fig. 1 is a schematic diagram illustrating LTE V2X UE sidelink communications. First, the UE1 transmits sidelink communications control information (SCI format 1), carried by the physical layer channel PSCCH, to the UE 2. SCI format 1 includes scheduling information of the pscch, such as frequency domain resources of the pscch. Second, UE1 transmits sidelink communications data to UE2, carried by the physical layer channel PSSCH. The PSCCH and the corresponding PSCCH are frequency division multiplexed, that is, the PSCCH and the corresponding PSCCH are located on the same subframe in the time domain and are located on different RBs in the frequency domain. The specific design modes of the PSCCH and the PSSCH are as follows:

1) the PSCCH occupies one subframe in the time domain and two consecutive RBs in the frequency domain. The initialization of the scrambling sequence takes a predefined value 510. The PSCCH may carry SCI format 1, where SCI format 1 at least includes frequency domain resource information of the PSCCH. For example, for the frequency domain resource indication field, SCI format 1 indicates the starting sub-channel number and the number of consecutive sub-channels of the pschs corresponding to the PSCCH.

2) The PSCCH occupies one subframe in the time domain, and the corresponding PSCCH employs Frequency Division Multiplexing (FDM). The PSSCH occupies one or more continuous sub-channels in the frequency domain, and the sub-channels represent n in the frequency domain_subCHsizeA plurality of RB, n in succession_subCHsizeConfigured by RRC parameters, the number of starting sub-channels and consecutive sub-channels is indicated by the frequency domain resource indication field of SCI format 1.

LTE V2X resource allocation Mode Transmission 3/4

Fig. 2 shows two resource allocation manners of LTE V2X, which are respectively referred to as resource allocation based on base station scheduling (Transmission Mode 3) and resource allocation based on UE sensing (sensing) (Transmission Mode 4). In LTE V2X, when there is eNB network coverage, a base station may configure a resource allocation manner of a UE, or referred to as a transmission mode of the UE, through UE-level proprietary RRC signaling (dedicated RRC signaling) SL-V2X-ConfigDedicated, specifically:

1) resource allocation scheme based on base station scheduling (Transmission Mode 3): the resource allocation method based on base station scheduling represents that the frequency domain resources used by sidelink communication are scheduled by the base station. The transmission mode 3 includes two scheduling modes, namely dynamic scheduling and semi-persistent scheduling (SPS). For dynamic scheduling, the UL grant (DCI format5A) includes frequency domain resources of the pscch, and the CRC of the PDCCH or EPDCCH carrying the DCI format5A is scrambled by the SL-V-RNTI. For SPS semi-persistent scheduling, the base station passes IE: the SPS-ConfigSL-rl4 configures one or more (up to 8) configured scheduling grants (configured grants), each configured scheduling grant containing a scheduling grant number (index) and a resource period of the scheduling grant. The UL grant (DCI format5A) includes frequency domain resources of the psch, and indication information (3bits) of a scheduling grant number and indication information of SPS activation (activation) or release (release or deactivation). The CRC of the PDCCH or EPDCCH carrying DCIformat 5A is scrambled by SL-SPS-V-RNTI.

Specifically, when the RRC signaling SL-V2X-ConfigDedicated is set to scheduled-r14, it indicates that the UE is configured to a transmission mode based on base station scheduling. The base station configures SL-V-RNTI or SL-SPS-V-RNTI through RRC signaling, and sends uplink scheduling permission UL grant to the UE through PDCCH or EPDCCH (DCI format5A, CRC adopts SL-V-RNTI scrambling or adopts SL-SPS-V-RNTI scrambling). The uplink scheduling grant UL grant at least includes scheduling information of psch frequency domain resources in sidelink communication. And when the UE successfully monitors PDCCH or EPDCCH scrambled by SL-V-RNTI or SL-SPS-V-RNTI, taking a PSSCH frequency domain resource indication domain in an uplink scheduling grant UL grant (DCI format5A) as indication information of a PSSCH frequency domain resource in the PSCCH (SCI format 1), and sending the PSCCH (SCI format 1) and the corresponding PSSCH.

For semi-persistent scheduling SPS in transmission mode 3, the UE receives DCI format5A scrambled by SL-SPS-V-RNTI on downlink subframe n. If the DCI format5A contains indication information of SPS activation, the UE determines frequency domain resources of the PSSCH according to the indication information in the DCI format5A, and determines time domain resources of the PSSCH (transmission sub-frame of the PSSCH) according to information such as sub-frame n and the like.

2) Resource allocation method based on UE sensing (sensing) (Transmission Mode 4): the UE sensing-based resource allocation mode represents a sensing (sensing) process of a UE-based candidate available resource set for sidelink communication. The RRC signaling SL-V2X-ConfigDedicated when set to UE-Selected-r14 indicates that the UE is configured to transmit mode based on UE sending. In the UE sensing based transmission mode,

the base station configures an available transmission resource pool, and the UE determines a sidelink transmission resource of the PSCCH in the transmission resource pool (resource pool) according to a certain rule (for a detailed procedure, see LTE V2X UE sending procedure), and transmits the PSCCH (SCI format 1) and the corresponding PSCCH.

Side communication resource pool (sidelink resource pool)

In the sidestream communication, the resources transmitted and received by the UE belong to a resource pool. For example, for a transmission mode based on base station scheduling in sidestream communication, the base station schedules transmission resources for sidelink UEs in the resource pool, or for a transmission mode based on UE perception in sidestream communication, the UE determines the transmission resources in the resource pool.

Method for determining PSCCH Resource block (Resource block) Resource pool by LTE V2X UE

When the configuration information or pre-configuration information of the resource pool includes "the UE always transmits the PSCCH and the corresponding (correlating) PSCCH on the adjacent (adjacent) RB", the PSCCH resource number m (PSCCH resource m) is composed of two consecutive RBs in the frequency domain, and the number n of the RB is n_RBIs n_RB＝n_subCHRBstart+m×n_subCHsize+ j, j ═ 0, 1, where n_subCHRBstartAnd n_subCHsizeIndicated by a higher layer RRC parameter;

when the resource pool configuration information or pre-configuration information includes "UE may transmit PSCCH and corresponding (correlating) PSCCH on non-adjacent (non-adjacent) RBs", PSCCH resource number m (PSCCH resource m) is composed of two consecutive RBs in frequency domain, and number n of RB is included in the resource pool configuration information or pre-configuration information_RBIs n_RB＝n_PSCCHstart+2 xm + j, j ═ 0, 1, where n_PSCCHstartIndicated by higher layer RRC parameters.

Configuration information of sub-channel (sub-channel) in LTE V2X resource pool (resource pool)

Sub-channel of a sub-channel represents n in the frequency domain_subCHsizeA plurality of RB, n in succession_subCHsizeConfigured by RRC parameters. The LTE V2X resource pool is configured by RRC cell SL-CommResourcePoolV2X-r14, which includes the total number of sub-channels, the size (size) of the sub-channels, and so on. The number of sub-channels is represented by a parameter numubchannel-r 14, and values of the parameter numubchannel-r 14 include 1, 3, 5, 8, 10, 15, and 20.

Parameter set (numerology) in NR (including NR sidelink) and in NR (including NR) sidelink) of Slot slot

Parameter set numerology includes both subcarrier spacing and cyclic prefix CP length implications. Where NR supports 5 subcarrier spacings, 15k, 30k, 60k, 120k, 240kHz (corresponding to μ ═ 0, 1, 2, 3, 4), and table 4.2-1 shows the set of supported transmission parameters, as shown below.

TABLE 4.2-1 NR supported subcarrier spacing

μ	Δf＝2^μ·15[kHz]	CP (Cyclic prefix)
			0	15	Is normal
1	30	Is normal
			2	60	Normal, extended
3	120	Is normal
			4	240	Is normal

Extended (Extended) CP is supported only when μ ═ 2, i.e., in the case of 60kHz subcarrier spacing, and only normal CP is supported in the case of other subcarrier spacing. For Normal (Normal) CP, each slot (slot) contains 14 OFDM symbols; for extended CP, each slot contains 12 OFDM symbols. For a sub-carrier spacing of 15kHz, 0, 1 slot 1 ms; mu is 1, namely 30kHz subcarrier interval, and 1 time slot is 0.5 ms; mu is 2, i.e. 60kHz subcarrier spacing, 1 slot is 0.25ms, and so on.

Parameter set in LTE (including LTE V2X) and slot and subframe in LTE (including LTE V2X)

LTE supports only 15kHz subcarrier spacing. Extended (Extended) CP is supported in LTE, as is normal CP. The subframe duration is 1ms, and comprises two slot slots, and the duration of each slot is 0.5 ms.

For Normal (Normal) CP, each subframe contains 14 OFDM symbols, and each slot in the subframe contains 7 OFDM symbols; for extended CP, each subframe contains 12 OFDM symbols, and each slot in the subframe contains 6 OFDM symbols.

Resource blocks RB and resource elements RE

The resource block RB is defined as in the frequency domain

The RB is 180kHz in the frequency domain for a contiguous number of subcarriers, e.g., 15kHz subcarrier spacing. For subcarrier spacing 15kHz 2^μThe resource element RE represents 1 subcarrier in the frequency domain and 1 OFDM symbol in the time domain.

DMRS (DMRS associated with PSSCH or DMRS for PSSCH)

And when the PSSCH is demodulated and decoded, the corresponding DMRS is adopted for channel estimation. For the DMRS corresponding to the psch in LTE V2X, the DMRS and the psch are located on the same PRB in the frequency domain. The time domain resource of the DMRS is OFDM symbol 2 and OFDM symbol 5 of the first slot in the subframe where the PSSCH is located, and includes OFDM symbol 1 and OFDM symbol 4 of the second slot in the subframe. For example, in LTE V2X, the psch occupies 8 consecutive PRBs in the frequency domain, and the total number of REs occupied by the DMRS corresponding to the psch is equal to 384(12 × 4 × 8), i.e., the total number of REs occupied by the corresponding DMRS on each PRB is equal to 48(12 × 4).

In NR sidelink, the DMRS corresponding to the PSCCH is also applicable to demodulation and decoding of the PSCCH, and may also be applicable to demodulation and decoding of the PSCCH, that is, the DMRS corresponding to the PSCCH may also be used to demodulate a PSCCH that includes information required for decoding (decoding) the PSCCH, or may not include information required for decoding the PSCCH.

DMRS configuration type 1(DMRS configuration type 1)/configuration type 2 (DMRS) configuration type2)

DMRS configuration type 1 means that the distribution of 12 REs (numbered 0-11) of DMRS within one RB is RE0, RE2, RE4, RE6, RE8, RE 10. Density RS of type 1 can be understood to be configured for DMRS_dense6/12 ═ 1/2. DMRS configuration type 2 means that the distribution of 12 REs (numbered 0-11) of DMRS within one RB is RE0, RE1, RE6, RE 7. Density RS of type 2 can be understood to be configured for DMRS_dense4/12 ═ 1/3.

It is worth noting that the density of DMRS or sidelink CSI-RS (denoted as RS) is referred to in the description of the present invention_denseValues can be taken from 1/2, 1/3,1/4, 1/6, 1/12, which is not limited by the present invention) indicates that the number of REs occupied by the DMRS or sidelink CSI-RS in one RB is RS_dense×12。

Time domain pattern of DMRS (DMRS pattern in time domain)

The time domain pattern of the DMRS comprises information such as the number n of OFDM symbols occupied by the DMRS in one slot and/or initial OFDM symbols. The time-domain pattern of the DMRS may contain other information than the above, and the present invention is not limited thereto.

Determination in examples related to the descriptionN_DMRSDescription of (1)

UE determines N_DMRSA specific embodiment of (A) is

Alternatively, another specific embodiment is

Wherein N represents the number of OFDM symbols occupied by DMRS (demodulation reference symbols) in one slot by the time domain pattern indication (or configuration) information of the DMRS, the method determines N_DMRSThe specific embodiments of (1) include, but are not limited to, the above two modes.

Channel state information reference signal CSI-RS

In Rel-15NR, in order to better adapt to a variation of a radio channel, a UE reports channel state information to a gNB by measuring CSI-RS. Similarly, a sidelink communication channel state reference signal sidelink CSI-RS is introduced into the NR sidelink for the sidelink UE to measure the sidelink communication channel state. And after measuring the side-row communication channel state according to the received side-row CSI-RS, the side-row communication channel state is reported by the side-row UE by using PSSCH carrying channel state information CSI.

Determination in examples related to the descriptionN_CSI-RSDescription of (1)

UE determines N_CSI-RSA specific embodiment of (A) is

Alternatively, another specific embodiment is

Wherein N represents the number of OFDM symbols occupied by the sidelink CSI-RS in one slot, or if other user equipment indicates that the sidelink CSI-RS is not transmitted or does not trigger (trigger) sidelink CSI reporting in the transmitted SCI, then N_CSI-RS0, the invention pairDeterminingNC_SI-RSThe specific embodiments of (a) include, but are not limited to, the three above-mentioned modes.

Specific examples, embodiments, and the like according to the present invention will be described in detail below. As described above, the examples and embodiments described in the present disclosure are illustrative for easy understanding of the present invention, and do not limit the present invention.

[ example one ]

Fig. 3 is a diagram illustrating a basic flow of a method performed by a user equipment according to a first embodiment of the present invention.

The method executed by the ue according to the first embodiment of the present invention is described in detail below with reference to the basic flowchart shown in fig. 3.

As shown in fig. 3, in a first embodiment of the present invention, the steps performed by the user equipment include:

in step S101, the sidestream communication user equipment determines configuration information of sidelink.

Optionally, the sidelink configuration information is configuration information sent by the base station through RRC signaling. Alternatively, the first and second electrodes may be,

optionally, the configuration information of the sidelink is included in Pre-configuration (Pre-configuration) information of the ue.

Optionally, the configuration information of the sidelink only includes configuration information of a sidelink resource pool, or, optionally, the configuration information of the sidelink includes configuration information of the sidelink resource pool, and also includes non-resource pool (optionally, cell-specific (cell-specific) or UE-specific (UE-specific)) sidelink configuration information.

Optionally, the sidelink configuration information includes sub-channel size configuration information of a sub-channel

Optionally, the

In units of RB.

Optionally, the configuration information of sidelink includes configuration information of a time domain length of the PSCCH

Optionally, the

In units of OFDM symbols.

Optionally, the sidelink configuration information includes configuration information of a frequency domain length of the PSCCH

Optionally, the

Configuration information of frequency domain length of PSCCH in RB unit or, alternatively

Is a predefined (pre-defined) or fixed (fixed) valueE.g., 2RB, 4RB, this is not a limitation of the present invention.

Optionally, the configuration information of sidelink includes configuration information of a DMRS configuration type. Or, optionally, the configuration type of the DMRS is fixed to a DMRS configuration type 1, or to a DMRS configuration type 2.

Optionally, the configuration information of the sidelink includes a list of DMRS time domain patterns (DMRS patterns in time domains), or optionally, the configuration information of the sidelink includes configuration information of the DMRS time domain patterns.

Optionally, the configuration information of sidelink includes configuration information of the number of REs occupied by PSCCH

In step S102, the sidelink ue receives PSCCH carrying sidelink communication control information SCI sent by other ues.

Optionally, the SCI includes indication information of a DMRS configuration type.

Optionally, the SCI contains indication information of a DMRS time-domain pattern.

Optionally, the SCI includes indication information whether the other ue sends a sidelink CSI-RS, and/or the SCI includes indication information whether the other ue triggers (trigger) sidelink CSI reporting.

In step S103, the sidelink ue determines the total number of PSCCH resource elements REs corresponding to the PSCCH according to the received SCI

(total number of RE allocated for PSSCH)。

Optionally, the

Represents the total number of REs of the PSSCH within one slot.

Optionally, the sidelink ue determines the number of OFDM symbols allocated by the psch according to the SCI

Or, the sidelink UE determines the time domain offset value from the PSCCH to the PSSCH according to the SCI

Optionally, the

In units of OFDM symbols.

Optionally, the sidelink ue determines the number of the psch assignment sub-channels according to the SCI

Optionally, the sidelink ue determines the total number N of REs of the sidelink CSI-RS according to the SCI_CSI-RSOr, optionally, the sidelink UE is according to the

And/or the said

And/or the SCI, determining the total number N of REs of the sidelink CSI-RS_CSI-RS。

Optionally, the sidelink UE configures the type information according to the DMRS, and/or the DMRS time domain pattern information

And/or the said

Determining a total number of REs N for a DMRS_DMRS。

Optionally, the sidelink UE is according to

And/or the said

And/or the said

And/or the said

And/or the said

And/or said N_DMRSAnd/or said N_CSI-RSAnd/or the said

Determining the

Specific embodiments include, but are not limited to, the following six embodiments:

1) optionally, the sidelink UE determines the total number of REs of the PSSCH

Is equal to

Alternatively, the first and second electrodes may be,

2) optionally, the sidelink UE determines the total number of REs of the PSSCH

Is equal to

Alternatively, the first and second electrodes may be,

3) optionally, if the DMRS configuration type isDMRS configuration type 1, the sidelink UE determines the total number of REs of the PSSCH

Is equal to

Wherein the content of the first and second substances,

indicating the number of OFDM symbols where the DMRS and the PSCCH overlap in the time domain,

alternatively, the first and second electrodes may be,

4) optionally, if the DMRS configuration type is DMRS configuration type 1, the sidelink user equipment determines the total number of REs in the psch

Is equal to

Wherein the content of the first and second substances,

alternatively, the first and second electrodes may be,

5) optionally, if the DMRS configuration type is DMRS configuration type 2, the sidelink user equipment determines the total number of REs of the psch

Is equal to

Wherein the content of the first and second substances,

alternatively, the first and second electrodes may be,

6) optionally, if the DMRS configuration type is DMRS configuration type 2, the sidelink user equipment determines the total number of REs of the psch

Is equal to

Wherein the content of the first and second substances,

indicating the number of OFDM symbols in which the DMRS and the PSCCH overlap in the time domain.

Optionally, the

Is equal to

And

is smaller value of, i.e. if said

Then the

Remains unchanged, otherwise, the

Is equal to

[ example two ]

Fig. 4 is a diagram illustrating a basic flow of a method performed by a user equipment according to a second embodiment of the present invention.

Next, the method executed by the user equipment according to the second embodiment of the present invention is described in detail with reference to the basic flowchart shown in fig. 4.

As shown in fig. 4, in the second embodiment of the present invention, the steps performed by the user equipment include:

in step S201, the sidelink communication user equipment determines configuration information of sidelink.

Optionally, the

In units of RB.

Optionally, the

In units of OFDM symbols.

Optionally, the

The frequency domain length of the PSCCH is predefined (pre-defined) or, alternatively, a fixed (fixed) value, e.g., 2RB, 4RB, in RB units, which the present invention does not limit.

In step S202, the sidelink ue receives PSCCH carrying sidelink communication control information SCI sent by other ues.

In step S203, the sidelink ue determines, according to the received SCI, the number of (within a sub-channel) resource units REs in each sub-channel of the psch corresponding to the PSCCH

(number of RE allocated for PSSCH within a sub-channel)。

Optionally, the

Represents the number of REs of the PSSCH within one slot.

Optionally, the

In units of OFDM symbols.

Determining the number of REs N of DMRS within each subchannel_DMRS。

Optionally, the sidelink ue determines the number N of REs of the sidelink CSI-RS in each sub-channel according to the SCI_CSI-RSOr, optionally, the sidelink UE is according to the

And/or the SCI, determining the number N of REs of the sidelink CSI-RS in each subchannel_CSI-RS。

Optionally, the sidelink UE is according to

And/or the said

And/or the said

And/or said N_DMRSAnd/or said N_CSI-RSAnd/or the said

Determining the

Optionally, the sidelink user equipment determines the

Is equal to

Optionally, the

Is equal to

And

is smaller value of, i.e. if said

Then the

Remains unchanged, otherwise, the

Is equal to

In step S204, the sidelink UE responds to the received SCI and/or SCI

Determining the total number of PSSCH Resource Elements (REs) corresponding to the PSCCH

(total number of RE allocated for PSSCH)。

Optionally, the

Represents the total number of REs of the PSSCH within one slot.

Optionally, the sidelink ue determines the number of the psch assignment sub-channels according to the SCl

Optionally, the sidelink UE is according to

And/or the said

Determining the

Alternatively, the first and second electrodes may be,

optionally, if the DMRS configuration type is DMRS configuration type 1, the sidelink user equipment determines the DMRS configuration type

Is equal to

Wherein the content of the first and second substances,

alternatively, the first and second electrodes may be,

optionally, if the DMRS configuration type is DMRS configuration type 2, the sidelink user equipment determines the DMRS configuration type

Is equal to

Wherein the content of the first and second substances,

[ third example ]

Fig. 5 is a diagram illustrating a basic flow of a method performed by a user equipment according to a third embodiment of the present invention.

Next, the method executed by the user equipment according to the third embodiment of the present invention is described in detail with reference to the basic flowchart shown in fig. 5.

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

in step S301, the sidestream communication user equipment determines configuration information of sidelink.

Optionally, the

In units of RB.

(optionally, the configuration information of the time domain length of the PSCCH carrying the first-level SCI and the second-level SCI is all configuration information of the PSCCH carrying the first-level SCI and the second-level SCI

) Optionally, the

Taking OFDM symbol as a unit, or, optionally, the configuration information of sidelink includes configuration information carrying PSCCH time domain length of first-stage SCI

And/or the configuration information of the sidelink comprises configuration information of PSCCH time domain length carrying second-level SCI

Optionally, the

In RB, or, alternatively, frequency domain length of PSCCH

Is a predefined (pre-defined) or fixed (fixed) value, such as 2RB or 4RB, which the present invention does not limit at all (alternatively, the configuration information of the frequency domain length of the PSCCH carrying the first-level SCI and the second-level SCI is all the frequency domain length of the PSCCH carrying the first-level SCI and the second-level SCI

) Or, optionally, the configuration information of sidelink includes configuration information of PSCCH frequency domain length carrying first-stage SCI

And/or the configuration information of the sidelink comprises configuration information of PSCCH frequency domain length carrying second-level SCI

(optionally, the configuration information of the number of REs occupied by PSCCH carrying the first-level SCI and the second-level SCI are all configuration information of the number of REs occupied by PSCCH

) Or, optionally, the configuration information of sidelink includes configuration information of the number of REs occupied by PSCCH carrying first-level SCI

Andor the configuration information of sidelink comprises configuration information of RE number occupied by PSCCH carrying second-level SCI

In step S302, the sidelink ue receives the first PSCCH carrying the first-level SCI and the second PSCCH carrying the second-level SCI sent by other ues.

Optionally, the first-level SCI includes indication information that the second-level SCI occupies resources.

Optionally, the first-level SCI or the second-level SCI includes indication information of a DMRS configuration type.

Optionally, the first-level SCI or the second-level SCI includes indication information of a DMRS time-domain pattern.

Optionally, the first-level SCI or the second-level SCI includes indication information whether the other user equipment sends the sidelink CSI-RS, and/or the first-level SCI or the second-level SCI includes indication information whether the other user equipment triggers (trigger) sidelink CSI reporting.

In step S303, the sidelink ue determines the total number of PSCCH resource elements REs corresponding to the first PSCCH and the second PSCCH according to the received first-level SCI and/or the received second-level SCI

(total number of RE allocated for PSSCH)。

Optionally, the

Represents the total number of REs of the PSSCH within one slot.

Optionally, the sidelink ue determines the number of OFDM symbols allocated by the psch according to the first-level SCI and/or the second-level SCI

Or, the sidelink UE determines a time domain offset value from the first PSCCH and/or the second PSCCH to the PSSCH according to the first-level SCI and/or the second-level SCI

Optionally, the

In units of OFDM symbols.

Optionally, the sidelink ue determines the number of the psch assignment sub-channels according to the first-level SCI and/or the second-level SCI

Optionally, the sidelink ue determines the total number N of REs of the sidelink CSI-RS according to the first-level SCI and/or the second-level SCI_CSI-RSOr, alternatively, isAccording to the above, the sidelink UE

And/or the said

And/or the first-stage SCI and/or the second-stage SCI, and determining the total number N of REs of the sidelink CSI-RS_CSI-RS。

And/or the said

Determining a total number of REs N for a DMRS_DMRS。

Optionally, the sidelink UE is according to

And/or the said

And/or the said

And/or the said

(alternatively, the above

And/or the said

) And/or the said

(alternatively, the above

And/or the said

) And/or the NDMRS, and/or the N_CSI-RSAnd/or the said

(alternatively, the above

And/or the said

) Determining the above

1) optionally, the sidelink UE determines the total number of REs of the PSSCH

Is equal to

Alternatively, the first and second electrodes may be,

2) optionally, the sidelink UE determines the total number of REs of the PSSCH

Is equal to

Optionally, the

In the alternative way of

Optionally, the

Another alternative of (1) is

Alternatively, the first and second electrodes may be,

3) optionally, if the DMRS configuration type is DMRS configuration type 1, the sidelink user equipment determines the total number of REs in the psch

Is equal to

Wherein the content of the first and second substances,

indicating a number of OFDM symbols in which the DMRS and the first PSCCH or the second PSCCH overlap in a time domain,

alternatively, the first and second electrodes may be,

Is equal to

Wherein the content of the first and second substances,

indicating the number of OFDM symbols in which the DMRS and the first or second PSCCH overlap in the time domain, optionally the PSCCH

In the alternative way of

Optionally, the

Another alternative of (1) is

Alternatively, the first and second electrodes may be,

Is equal to

Wherein the content of the first and second substances,

alternatively, the first and second electrodes may be,

Is equal to

Wherein the content of the first and second substances,

In the alternative way of

Optionally, the

Another alternative of (1) is

Optionally, the

Is equal to

And

is smaller value of, i.e. if said

Then the

Remains unchanged, otherwise, the

Is equal to

[ example four ]

Fig. 6 is a diagram illustrating a basic flow of a method performed by a user equipment according to a fourth embodiment of the present invention.

Next, a method executed by the user equipment according to the fourth embodiment of the present invention is described in detail with reference to the basic flowchart shown in fig. 6.

As shown in fig. 6, in the fourth embodiment of the present invention, the steps performed by the user equipment include:

in step S401, the sidestream communication user equipment determines configuration information of sidelink.

Optionally, the

In units of RB.

) Optionally, the

Optionally, the

The frequency domain length of the PSCCH is predefined (pre-defined) or fixed (fixed) in RB units, such as 2RB and 4RB, which is not limited by the present invention (alternatively, the configuration information of the frequency domain length of the PSCCH carrying the first-level SCI and the second-level SCI is the same as the configuration information of the frequency domain length of the PSCCH carrying the first-level SCI and the second-level SCI

) Or is orOptionally, the configuration information of the sidelink includes configuration information of the number of REs occupied by PSCCH carrying the first-level SCI

In step S402, the sidelink ue receives the first PSCCH carrying the first-level SCI and the second PSCCH carrying the second-level SCI sent by other ues.

Optionally, the first-level SCI includes indication information that the second-level SCI occupies resources. .

In step S403, the sidelink ue determines, according to the received first-level SCI and/or second-level SCI, the number of (within a sub-channel) resource units REs in each sub-channel of the psch corresponding to the first PSCCH and the second PSCCH

(number of RE allocated for PSSCH within a sub-channel)。

Optionally, the

Represents the number of REs of the PSSCH within one slot.

Optionally, the

In units of OFDM symbols.

Determining the number of REs N of DMRS within each subchannel_DMRS。

Optionally, the sidelink ue determines the number N of REs of the sidelink CSI-RS in each sub-channel according to the first-level SCI and/or the second-level SCI_CSI-RSOr, optionally, the sidelink UE is according to the

And/or the first-stage SCI and/or the second-stage SCI, and determining the number N of REs of the sidelink CSI-RS in each subchannel_CSI-RS。

Optionally, the sidelink UE is according to

And/or the said

And/or the said

(alternatively, the above

And/or the said

) And/or said N_DMRSAnd/or said N_CSI-RSAnd/or the said

(alternatively, the above

And/or the said

) Determining the above

Optionally, the sidelink user equipment determines the

Is equal to

Optionally, the

In an alternative embodiment of

The above-mentioned

Another alternative embodiment of (1) is

Optionally, the

Is equal to

And

is smaller value of, i.e. if said

Then the

Remains unchanged, otherwise, the

Is equal to

In step S404, the sidelink UE responds to the received first-level SCI and/or the second-level SCI and/or the received second-level SCI

Determining a total number of PSSCH Resource Elements (REs) corresponding to the first PSCCH and the second PSCCH

(total number of RE allocated for PSSCH)。

Optionally, the

Represents the total number of REs of the PSSCH within one slot.

Optionally, the sidelink UE is according to

And/or the said

Determining the

Alternatively, the first and second electrodes may be,

Is equal to

Wherein the content of the first and second substances,

alternatively, the first and second electrodes may be,

Is equal to

Wherein the content of the first and second substances,

represents the number of OFDM symbols in which the DMRS and the first PSCCH or the second PSCCH overlap in the time domain.

[ example five ]

Fig. 7 is a diagram illustrating a basic flow of a method performed by a user equipment according to a fifth embodiment of the present invention.

Next, a method executed by the user equipment according to the fifth embodiment of the present invention is described in detail with reference to the basic flowchart shown in fig. 7.

As shown in fig. 7, in a fifth embodiment of the present invention, the steps performed by the user equipment include:

in step S501, the sidelink communication user equipment determines configuration information of sidelink.

Optionally, the

In units of RB.

) Optionally, the

Optionally, the

In RB, or, alternatively, frequency domain length of PSCCH

And or bothThe configuration information of the sidelink comprises configuration information of the number of REs occupied by PSCCH carrying second-level SCI

In step S502, the sidelink ue receives the first PSCCH carrying the first-level SCI and the second PSCCH carrying the second-level SCI sent by other ues.

In step S503, the sidelink ue determines the total number of PSCCH resource elements REs corresponding to the first PSCCH and the second PSCCH according to the received first-level SCI and/or the second-level SCI

(total number of RE allocated for PSSCH)。

Optionally, the

Represents the total number of REs of the PSSCH within one slot.

Or the sidelink UE is according to the aboveA first-level SCI and/or the second-level SCI, and determining a time domain offset value from the first PSCCH and/or the second PSCCH to the PSSCH

Optionally, the

In units of OFDM symbols.

Optionally, the sidelink UE determines the total number of REs NC of the sidelink CSI-RS according to the first-level SCI and/or the second-level SCI_SI-RSOr, optionally, the sidelink UE is according to the

And/or the said

And/or the said

Determining a total number of REs N for a DMRS_DMRS。

Optionally, the sidelink UE is according to

And/or the said

And/or the said

And/or the said

(alternatively, the above

And said

) And/or the said

(alternatively, the above

And said

) And/or said N_DMRSAnd/or said N_CSI-RSAnd/or the said

(alternatively, the above

And said

) Determining the above

Specific embodiments include, but are not limited to, the following 12 embodiments:

1) optionally, the sidelink UE determines the total number of REs of the PSSCH

Is equal to

Alternatively, the first and second electrodes may be,

2) optionally, the sidelink UE determines the total number of REs of the PSSCH

Is equal to

Alternatively, the first and second electrodes may be,

3) optionally, the sidelink UE determines the total number of REs of the PSSCH

Is equal to

Alternatively, the first and second electrodes may be,

4) optionally, the sidelink UE determines the total number of REs of the PSSCH

Is equal to

Alternatively, the first and second electrodes may be,

5) optionally, if the DMRS configuration type is DMRS configuration type 1, the DMRS configuration type is DMRS configuration type 1Determining, by sidelink UE, the total number of REs of the PSSCH

Is equal to

Wherein the content of the first and second substances,

represents the number of OFDM symbols in which the DMRS and the first PSCCH and/or the second PSCCH overlap in the time domain,

alternatively, the first and second electrodes may be,

6) optionally, if the DMRS configuration type is DMRS configuration type 1, the sidelink user equipment determines the total number of REs in the psch

Is equal to

Wherein the content of the first and second substances,

indicating a number of OFDM symbols where the DMRS and the first PSCCH overlap in a time domain,

indicating a number of OFDM symbols in which the DMRS and the second PSCCH overlap in a time domain,

alternatively, the first and second electrodes may be,

7) optionally, if the DMRS configuration type is DMRS configuration type 1, the sidelink user equipment determines the total number of REs in the psch

Is equal to

Wherein the content of the first and second substances,

alternatively, the first and second electrodes may be,

8) optionally, if the DMRS configuration type is DMRS configuration type 1, the sidelink user equipment determines the total number of REs in the psch

Is equal to

Wherein the content of the first and second substances,

alternatively, the first and second electrodes may be,

9) alternatively, if the DMR isIf the S configuration type is DMRS configuration type 2, the sidelink UE determines the total number of REs of the PSSCH

Is equal to

Wherein the content of the first and second substances,

alternatively, the first and second electrodes may be,

10) optionally, if the DMRS configuration type is DMRS configuration type 2, the sidelink user equipment determines the total number of REs of the psch

Is equal to

Wherein the content of the first and second substances,

alternatively, the first and second electrodes may be,

11) optionally, if the DMRS configuration type is DMRS configuration type 2, the sidelink user equipment determines the total number of REs of the psch

Is equal to

Wherein the content of the first and second substances,

alternatively, the first and second electrodes may be,

12) optionally, if the DMRS configuration type is DMRS configuration type 2, the sidelink user equipment determines the total number of REs of the psch

Is equal to

Wherein the content of the first and second substances,

represents the number of OFDM symbols in which the DMRS and the second PSCCH overlap in the time domain.

Optionally, the

Is equal to

And

is smaller value of, i.e. if said

Then the

Remains unchanged, otherwise, the

Is equal to

[ sixth example ]

Fig. 8 is a diagram showing a basic flow of a method performed by a user equipment of embodiment six of the present invention.

Next, a method executed by the user equipment according to the sixth embodiment of the present invention is described in detail with reference to the basic flowchart shown in fig. 8.

As shown in fig. 8, in a sixth embodiment of the present invention, the steps performed by the user equipment include:

in step S601, the sidelink communication user equipment determines configuration information of sidelink.

Optionally, the

In units of RB.

) Optionally, the

Optionally, the

In step S602, the sidelink ue receives the first PSCCH carrying the first-level SCI and the second PSCCH carrying the second-level SCI sent by other ues.

In step S603, the sidelink ue determines, according to the received first-level SCI and/or second-level SCI, the number of (within a sub-channel) resource units REs in each sub-channel of the psch corresponding to the first PSCCH and the second PSCCH

(number of RE allocated for PSSCH within a sub-channel)。

Optionally, the

Represents the number of REs of the PSSCH within one slot.

Optionally, the

In units of OFDM symbols.

Determining the number of REs N of DMRS within each subchannel_DMRS。

Optionally, the sidelink UE is according to

And/or the said

And/or the said

(alternatively, the above

And/or the said

) And/or said N_DMRSAnd/or said N_CSI-RSAnd/or the said

(alternatively, the above

And/or the said

) Determining the above

Optionally, the sidelink user equipment determines the

Is equal to

Alternatively, the first and second electrodes may be,

optionally, the sidelink user equipment determines the

Is equal to

Optionally, theThe above-mentioned

Is equal to

And

is smaller value of, i.e. if said

Then the

Remains unchanged, otherwise, the

Is equal to

In step S604, the sidelink ue receives the first-level SCI and/or the second-level SCI

(total number of RE allocated for PSSCH)。

Optionally, the

Represents the total number of REs of the PSSCH within one slot.

Optionally, the sidelink UE is according to

And/or the said

Determining the

Alternatively, the first and second electrodes may be,

Is equal to

Wherein the content of the first and second substances,

alternatively, the first and second electrodes may be,

Is equal to

Wherein the content of the first and second substances,

alternatively, the first and second electrodes may be,

Is equal to

Wherein the content of the first and second substances,

alternatively, the first and second electrodes may be,

Is equal to

Wherein the content of the first and second substances,

Fig. 9 is a block diagram showing a user equipment UE according to the present invention. As shown in fig. 9, the user equipment UE80 includes a processor 801 and a memory 802. The processor 801 may include, for example, a microprocessor, microcontroller, embedded processor, or the like. The memory 802 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 802 has stored thereon program instructions. Which when executed by the processor 801 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 equipment, comprising:

determining configuration information of sideline communication sidelink;

receiving a physical sidelink communication control channel PSCCH (physical sidelink communication control channel) carrying sidelink communication control information SCI (communication control information) sent by other user equipment;

determining the total number of Resource Elements (REs) of a physical sidelink communication shared channel (PSSCH) corresponding to the PSCCH according to the received SCI

2. A method performed by a user equipment, comprising:

determining configuration information of sideline communication sidelink;

determining the number of Resource Elements (REs) in each sub-channel of a physical sidelink communication control channel (PSSCH) corresponding to the PSCCH according to the received SCI

According to the received SCI and/or the

3. The method according to claim 1 or 2,

the configuration information is configuration information sent by a base station through Radio Resource Control (RRC) signaling; or

The configuration information is included in pre-configuration information of the user equipment, and,

the configuration information only contains the configuration information of resource pool, or

The configuration information includes the configuration information of resource pool, and also includes the sidelink communication configuration information of non-resource pool,

the configuration information includes:

configuration information of sub-channel size of sub-channel

And/or

Configuration information of the time domain length of the PSCCH

And/or

Configuration information of the frequency domain length of the PSCCH

And/or

Configuration information of a configuration type of a demodulation reference signal DMRS; and/or

A list of time-domain patterns of a demodulation reference signal (DMRS) or configuration information of the time-domain patterns; and/or

Configuration information of the number of resource units (REs) occupied by the PSCCH

4. The method according to claim 1 or 2,

the SCI includes:

indication information of a configuration type of a demodulation reference signal (DMRS); and/or

Indication information of a time domain pattern of a demodulation reference signal (DMRS); and/or

Whether the other user equipment sends the indication information of the sidelink communication channel state information reference signal sidelink CSI-RS or not; and/or

And whether the other user equipment triggers the indication information reported by the sidelink CSI.

5. The method according to claim 1 or 2,

the above-mentioned

6. The method of claim 1,

The method comprises the following steps:

determining a number of Orthogonal Frequency Division Multiplexing (OFDM) symbols of the PSSCH allocation according to the SCI

And/or

Determining the number of PSSCH assigned subchannels from the SCI

And/or

Determining the total number N of Resource Elements (REs) of sideline communication channel state information reference signals (sidelink CSI-RS) according to the SCI_CSI-RSAccording to said

And/or sub-channel size configuration information

And/or the SCI to determine the total number of Resource Elements (REs) N of the sidelink CSI-RS_CSI-RS(ii) a And/or

According to the configuration type information of a demodulation reference signal DMRS (demodulation reference signal), and/or the time domain pattern information of the DMRS, and/or the DMRS

And/or the said

To determine a total number N of Resource Elements (REs) of the DMRS_DMRS(ii) a And/or

According to the above

And/or the said

And/or the said

And/or configuration information of frequency domain length of the PSCCH

And/or configuration information of the time domain length of the PSCCH

And/or said N_DMRSAnd/or the N_CSI-RSAnd/or configuration information of the number of resource units (REs) occupied by the PSCCH

To determine said

7. The method of claim 2,

the above-mentioned

Represents the number of resource elements, REs, of the PSSCH within one slot.

8. The method of claim 2,

The method comprises the following steps:

And/or

According to the configuration type information of a demodulation reference signal DMRS (demodulation reference signal), and/or the time domain pattern information of the DMRS, and/or the configuration information of the sub-channel size of a sub-channel

To determine the number N of resource elements RE within each subchannel of the DMRS_DMRS(ii) a And/or

Determining the number N of Resource Elements (REs) of sidelink communication channel state information reference signal (sidelink CSI-RS) in each subchannel according to the SCI_CSI-RSAccording to said