CN115334655A

CN115334655A - Method performed by user equipment and user equipment

Info

Publication number: CN115334655A
Application number: CN202110508156.0A
Authority: CN
Inventors: 赵毅男; 罗超; 刘仁茂
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 2021-05-10
Filing date: 2021-05-10
Publication date: 2022-11-11

Abstract

The invention provides a method executed by user equipment and the user equipment, wherein the method comprises the following steps: the high layer requests or triggers the user equipment to determine the transmission resource of PSSCH/PSCCH; and the user equipment determines a set of candidate timeslots.

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, device-to-Device communication (Device-to-Device communication) refers to a communication method in which two user equipments directly communicate with each other without forwarding through a base station or a core network. A research topic on implementing an approaching D2D communication service with LTE devices was approved at RAN #63 congress of 3rd Generation Partnership project (3 gpp) in 2014, 3 month (see non-patent document 1). Functions introduced by LTE Release 12 d 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 full 3gpp ran #66 meeting at 12 months 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 non-network coverage scenarios and partial network coverage scenarios;

2) Priority handling mechanism for D2D communication.

Based on the design of D2D communication mechanism, the V2X feasibility study topic based on D2D communication was approved at 3GPP RAN #68 second-time congress of 2015, 6 months. V2X represents a Vehicle to an observing, and it is desirable to realize information interaction between a Vehicle and all entities that may affect the Vehicle, so as to reduce accidents, alleviate traffic congestion, 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 divides the study and standardization work of V2X into 3 stages. The first stage is completed in 2016, 9 months, mainly focusing on V2V, and is formulated based on LTE Release 12 and Release 13 d2d (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 for solving the problem of cellular internet of vehicles communication 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 proximity communication between D2D devices, the functions introduced by LTE Release 14 V2X 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 V2X research topic belongs to the LTE Release 15 research category (see non-patent document 4), and the introduced main characteristics include high-order 64QAM modulation, V2X carrier aggregation, short TTI transmission, and also include feasibility research of transmit diversity.

At the 6 th and 6 th 3gpp ran #80 congress 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 5G NR V2X project, a resource allocation mode 2 (resource allocation mode 2) based on user equipment sensing (sending) is supported, or referred to as a transmission mode 2. In resource allocation mode 2, the physical layer of the ue senses the transmission resources in the resource pool and reports the available set of transmission resources to the upper layer. The upper layer selects resources specifically for sidelink communication transmission after obtaining the report of the physical layer.

On the full meeting of 3gpp ran #90e at 12 th 2020, the standardization study subject (see non-patent document 6) based on the NR sidelink enhancement (NR sidelink enhancement) that has been standardized has been approved. The enhancement of the sideline communication comprises the following two aspects:

1) Resource allocation for standardized reduction of power consumption (power saving) of a communication user equipment includes, but is not limited to: a resource allocation mode based on partial sensing and a resource allocation mode based on random resource selection;

2) Research is carried out to improve the communication reliability of the resource allocation mode 2 in NR side row communication and reduce the communication time delay of the resource allocation mode 2.

The scheme of the patent comprises a method for determining a monitored time slot set in a resource allocation mode based on partial perception by a user equipment of sidestream communication in the sidestream communication enhancement, and a method for determining candidate time slots by the user equipment of sidestream communication.

In the resource allocation method 2 based on ue sensing, the physical layer of the ue senses the transmission resources in the resource pool, and indicates that the ue excludes (excle) the resource in the candidate resource set that overlaps with the resource indicated by the indication information according to the received indication information in the SCIs sent by other ues, and the resource that is not excluded in the candidate resource set is reported to the higher layer.

The solution of the present patent also includes a method for a sidelink communication user equipment to exclude resources from a candidate resource set in a resource allocation method based on partial sensing.

Documents of the prior art

Non-patent document

Non-patent document 1: RP-140518, work item deployment on LTE Device to Device deployment 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 on 3GPP V2X Phase 2

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

Non-patent document 6: RP-202846, WID vision: NR sidelink enhancement

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: the high layer requests or triggers the user equipment to determine the transmission resource of PSSCH/PSCCH; and the user equipment determining a set of candidate timeslots.

According to the method performed by the user equipment in the first aspect of the present invention, the resource allocation manner of the user equipment is a resource allocation manner based on partial sensing.

According to the method performed by the user equipment of the first aspect of the invention, the manner in which the user equipment determines the set of candidate timeslots is dependent on the implementation of the user equipment.

According to the method performed by the user equipment of the first aspect of the present invention, the higher layer requests the user equipment to determine the transmission resources of the psch/PSCCH on a slot n.

According to the method performed by the user equipment of the first aspect of the present invention, the user equipment determines the candidate timeslot set such that a timeslot of the candidate timeslot set is not identical to a timeslot

Overlap in the time domain, wherein,

is any one of the set of candidate timeslots; p _reserve Is equal to

Or P _reserve Is equal to

T′ _max Indicates the number of slots belonging to the resource pool for SFN/DFN0 to SFN/DFN 1023 in 10240 ms; k is equal to 1, or a positive integer, or determined by configuration or pre-configuration information.

The method performed by the user equipment according to the first aspect of the present invention further comprises: the user equipment determines a set of timeslots to listen to.

According to the method performed by the ue in the first aspect of the present invention, in a situation where a kth bit in a bitmap is set to 1 or 0, the set of listening slots listened by the ue at least includes slots

Wherein the content of the first and second substances,

is any one of the set of candidate timeslots; p _reserve Is equal to

Or P _reserve Is equal to

T′ _max Indicates the number of time slots of SFN/DFN0 to SFN/DFN 1023 belonging to the resource pool within 10240 ms; for a set of time slots

Wherein K represents a positive integer, and n is the same as or equal to

Or alternatively

Or

Or time slot

Or

Or

Or

The last previous slot is denoted as

Wherein the content of the first and second substances,

representing the first time slot in the time domain in the set of candidate time slots.

According to the method performed by the user equipment of the first aspect of the present invention, the set of listening slots that the user equipment listens to includes at least slots

Removing time slots that overlap the candidate time slots, wherein,

is any one of the set of candidate timeslots; p _reserve Is equal to

Or P _reserve Is equal to

The user equipment according to the second aspect of the present invention comprises: a processor; and a memory storing instructions; wherein the instructions, when executed by the processor, perform any of the methods according to the above first aspect of the invention.

The invention has the advantages of

According to the scheme of the patent, in the NR side row communication enhancement, firstly, the number of time slots in a time slot set which needs to be monitored by user equipment can be reduced, the power consumption of the side communication user equipment is effectively reduced, and the service life of the equipment is prolonged; secondly, the monitoring time slot set and the candidate time slot set are not overlapped in a time domain, and the time delay of sideline communication is reduced; thirdly, the probability of the conflict of the collateral communication resources can be reduced, and the reliability of the collateral communication is improved.

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 schematic diagram showing a basic procedure of a method performed by a user equipment in the first and second embodiments of the invention.

Fig. 4 is a diagram showing a basic procedure of a method performed by a user equipment in the third embodiment of the present invention.

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

Fig. 6 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 so as to prevent the confusion of the 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.

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

LTE: long Term Evolution, long Term Evolution

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 (PRCH)

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, 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 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, 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

SIB1: 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

And (3) MCG: master Cell Group, master Cell Group

SCG: secondary Cell Group, secondary Cell Group

PCell: primary Cell

SCell: secondary Cell, secondary Cell

PSFCH: physical Sidelink Feedback Channel, physical Sidelink communications Feedback Channel

SPS: semi-persistent Scheduling, semi-persistent Scheduling

TA: timing Advance, uplink Timing Advance

PT-RS: phase-Tracking Reference Signals

TB: transport Block

CB: code Block, code Block/Code Block

QPSK: quadrature Phase Shift Keying (QPSK)

16/64/256QAM:16/64/256Quadrature Amplitude Modulation

AGC: auto Gain Control

TDRA (field): time Domain Resource Assignment, time Domain Resource Assignment indication (Domain)

FDRA (field): frequency Domain Resource Assignment, frequency Domain Resource allocation indication (Domain)

ARFCN: absolute Radio Frequency Channel Number, absolute Radio Frequency Channel Number

SC-FDMA: single Carrier-Frequency Division Multiple Access, single Carrier-Frequency Division Multiple Access

MAC: medium Access Control, media Access Control layer

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 scheme of V2X (sidelink) communication and the transmission mode of V2X (sidelink) communication may be replaced equivalently. 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. In NR side-row communication, transmission mode 1 indicates a transmission mode (resource allocation scheme) based on base station scheduling; transmission mode 2 denotes a transmission mode (resource allocation manner) based on user equipment sensing (sensing) and resource selection.

The PSCCH in the description of the present invention is used to carry the 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, PSSCH references in the specification refer to corresponding, or related SCIs (including first-level SCI and second-level SCI) as having the same meaning, and all refer to associated SCI or associated SCI. It is noted that the first stage SCI, referred to as lst stage SCI or SCI format1-A, is transmitted in the PSCCH; the second level SCI is called 2nd stage SCI or SCI format 2-A (or SCI format 2-B), and is transmitted in the resource of the corresponding PSSCH.

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) Communication is carried out on the side of network Coverage (In-Coverage): both UEs performing sidelink communications have network coverage (e.g., the UE detects at least one cell satisfying the "cell selection criteria" at a frequency where sidelink communications are desired, indicating that the UE has network coverage).

3) Partial-network overlay (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, UE1 transmits sidelink communications control information (SCI format 1) carried by the physical layer channel PSCCH to UE 2. The SCI format1 includes scheduling information of the PSSCH, for example, frequency domain resources of the PSSCH. Then, UE1 transmits sidelink communication data to UE2, which is carried by a physical layer channel pscch. 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. In LTE V2X, a transport block TB may contain only one initial transmission, or one initial transmission and one blind retransmission (indicating a retransmission not based on HARQ feedback).

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 SCIformat1, where SCIformat1 at least includes frequency domain resource information of the PSCCH. For example, for the frequency domain resource indication field, SCI format1 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 _subCHsize A continuous RB, n _subCHsize Configured 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 3/4

Fig. 2 shows two resource allocation schemes 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 NR side-row communication, transmission mode 3 of LTE V2X corresponds to transmission mode 1 in NR V2X, which is a transmission mode based on base station scheduling; transmission mode4 of LTE V2X corresponds to transmission mode 2 in NR V2X, which is a UE-aware based transmission mode. 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 dedicated RRC signaling (dedicated RRC signaling) SL-V2X-ConfigDedicated, specifically:

1) Resource allocation scheme (Transmission Mode 3) based on base station scheduling: 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, i.e., dynamic scheduling and semi-persistent scheduling (SPS). For dynamic scheduling, the frequency domain resource including PSSCH in UL grant (DCI format 5A), and the PDCCH carrying DCI format 5A or CRC of EPDCCH are scrambled by SL-V-RNTI. For SPS semi-persistent scheduling, the base station passes IE: the SPS-ConfigSL-r14 configures one or more (up to 8) configured scheduling grants (configured grant), each configured scheduling grant containing a scheduling grant number (index) and a resource period of the scheduling grant. The UL grant (DCI format 5A) includes frequency domain resources of the psch, and indication information (3 bits) 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 the DCI format 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 format 5A, CRC scrambling by adopting SL-V-RNTI or scrambling by adopting SL-SPS-V-RNTI). 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 the PDCCH or EPDCCH scrambled by the SL-V-RNTI or the SL-SPS-V-RNTI, taking a PSSCH frequency domain resource indication domain in an uplink scheduling permission UL grant (DCI format 5A) as indication information of a PSSCH frequency domain resource in a 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 SL-SPS-V-RNTI scrambled DCIformat 5A on downlink subframe n. If the DCI format 5A contains indication information of SPS activation, the UE determines frequency domain resources of the PSSCH according to the indication information in the DCI format 5A, 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 is set to UE-Selected-r14, which indicates that the UE is configured to transmit mode based on UE sending. In a transmission mode based on UE sending, a base station configures an available transmission resource pool, and a UE determines a sidelink transmission resource of a PSCCH in the transmission resource pool (resource pool) according to a certain rule (for a detailed description of the 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, both the sending and receiving resources of 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 transmission resources in the resource pool.

Resource allocation based on (partial) perception

For the resource allocation mode based on (partial) perception, the sidestream communication user equipment selects candidate resources in a time window, determines candidate resources overlapping with the reserved resources according to the reserved resources indicated by the PSCCH sent by other user equipment in the listening time slot, and excludes the candidate resources (excludes) overlapping with the reserved resources. And the physical layer reports the candidate resource set which is not excluded to the MAC layer, and the MAC layer selects transmission resources for PSSCH/PSCCH.

Resource selection window [ n + T1, n + T2 ]]

In a sensing (or partially sensing) based resource allocation approach, the higher layer requests or triggers the physical layer to determine (sense or partially sense) resources for PSCCH/PSCCH transmission at time slot n. The resource selection window is defined as [ n + T1, n + T2 ]]I.e. the user equipment selects a transmission resource within the window. Wherein T1 satisfies the condition

The choice of T1 depends on the implementation of the user equipment; the RRC configuration information comprises a configuration list sl-Selection WindowList of resource Selection windows, wherein the list corresponds to a given priority prio _TX The element of (priority of transmission PSSCH) is denoted T _2min . If the T is _2min Less than the remaining packet delay budget (remaining PDB), then T2 satisfies the condition T _2min T2 ≦ remaining PDB, T2 selection depending on user equipment implementation; otherwise, T2 is set to remaining PDB.

Is defined as follows (. Mu.m) _SL A subcarrier spacing parameter indicative of sidelink communication, i.e. a subcarrier spacing of

Table 8.1.4-2：

Value of

Table 8.1.4-1：

Value of

_x，y Candidate single-slot resource R (candidate single-slot resource)

One candidate single slot resource R _x，y Is indicated in a time slot

Upper continuous L _subCH A subchannel (denoted x + j, where j =0,1 _subCH -1) of the collection. Wherein the content of the first and second substances,

representing any one of the set of candidate timeslots in the resource selection window. L is a radical of an alcohol _subCH Indicating the number of subchannels provided by a higher layer (or upper layer) for psch/PSCCH transmission.

Parameter set (numeroloay) 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 sub-carrier spacings, 15k,30k,60k,120k,240khz (corresponding to μ =0,1,2,3, 4), 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 and normal
			2	60	Normal, extended
3	120	Is normal
			4	240	Is normal

Extended (Extended) CP is supported only in case of μ =2, i.e., 60kHz subcarrier spacing, and only normal CP is supported in 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 μ =0, i.e. 15kHz subcarrier spacing, 1 slot =1ms; μ =1, i.e. 30kHz subcarrier spacing, 1 slot =0.5ms; μ =2, i.e. 60kHz subcarrier spacing, 1 slot =0.25ms, and so on.

NR and LTE have the same definition for a subframe (subframe), indicating 1ms. For a subcarrier spacing configuration μ, the slot number within 1 subframe (1 mS) may be expressed as

In the range of 0 to

The slot number within 1 system frame (frame, duration 10 ms) can be expressed as

In the range of 0 to

Wherein the content of the first and second substances,

and

the definition of the case at different subcarrier spacings μ is shown in the table below.

Table 4.3.2-1: the number of symbols contained in each slot, the number of slots contained in each system frame and the number of slots contained in each subframe during normal CP

Table 4.3.2-2: when CP is expanded (60 kHz), the number of symbols contained in each slot, the number of slots contained in each system frame, and the number of slots contained in each subframe

On the NR carriers, the numbered SFN of the system frame (or simply frame) ranges from 0 to 1023. The concept of a direct system frame number DFN is introduced in the sidelink communication, again with a number ranging from 0 to 1023, and the above statements on the relation between system frames and numerology are equally applicable to direct system frames, e.g. a direct system frame having a duration equal to 10ms, a direct system frame comprising 10 slot slots for a subcarrier spacing of 15kHz, etc. DFN is applied for timing on sidelink carriers.

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 0.5ms.

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 x 2 ^μ The resource element RE represents 1 subcarrier in the frequency domain and 1 OFDM symbol in the time domain.

Specific examples and embodiments 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 procedure 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 process diagram shown in fig. 3.

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

in step S101, a higher layer (or upper layer) requests (or triggers) the sidelink communication user equipment (physical layer) to determine the transmission resource of the pscsch/PSCCH.

Optionally, the resource allocation manner of the ue is a partial sensing (partial sensing) based resource allocation manner.

Optionally, the higher layer requests the user equipment for sidelink communication to determine the transmission resource of the psch/PSCCH on the slot n.

In step S102, the sidestream user equipment determines a set of candidate slots (candidate slots).

Optionally, the user equipment determines the candidate timeslot set in a manner that depends on an implementation of the user equipment (up to UE initialization).

In step S103, the sidestream user equipment determines a monitored timeslot set.

Optionally, if the kth bit in a bitmap is set to 1 (or set to 0), the listening slot set of the ue listening (or monitor) at least includes slots

Wherein, the first and the second end of the pipe are connected with each other,

is any one of the set of candidate timeslots; alternatively, P _reserve Is equal to

Or, P _reserve Is equal to

The resource reservation period set represents a subset or a whole set of the resource reservation period set in the resource pool configuration information; optionally, the resource pool configuration information includes the resource reservation period set, where T' _max Indicating the number of slots belonging to the resource pool within 10240ms (SFN/DFN 0-SFN/DFN 1023). For a set of time slots

(where K represents a positive integer), in the time slot n (or,

alternatively, the first and second liquid crystal display panels may be,

or

) Or time slot

(or (alternatively,

alternatively, the first and second electrodes may be,

or alternatively

) The last time slot before is denoted as

Wherein the content of the first and second substances,

[ example two ]

Fig. 3 is a diagram illustrating a basic procedure 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 process diagram shown in fig. 3.

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

in step S101, a higher layer (or upper layer) requests (or triggers) the sidelink communication user equipment (physical layer) to determine the transmission resource of the psch/PSCCH.

Optionally, the resource allocation manner of the user equipment is a partial sensing (partial sensing) based resource allocation manner.

Optionally, the higher layer requests the user equipment for sidelink communication to determine the transmission resource of the psch/PSCCH on slot n.

In step S102, the sidestream user equipment determines a set of candidate timeslots (candidate slots).

Optionally, the listening slot set of the ue listening (or monitor) at least includes a slot

-removing (except for) the time slots overlapping said candidate time slots. Wherein the content of the first and second substances,

Or, P _reserve Is equal to

The resource reservation period set represents a subset or a whole set of the resource reservation period set in the resource pool configuration information; optionally, the resource pool configuration information includes the resource reservation period set, where T' _max Indicating the number of slots belonging to the resource pool in 10240ms (SFN/DFN 0-SFN/DFN 1023). k is equal to 1, or a positive integer, or is determined by configuration (or preconfigured) information, which is not limited by the invention.

[ third example ]

Fig. 4 is a diagram illustrating a basic procedure 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 process diagram shown in fig. 4.

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

in step S201, the higher layer (or upper layer) requests (or triggers) the sidelink communication user equipment (physical layer) to determine the transmission resource of the pscsch/PSCCH.

In step S202, the sidestream user equipment determines a set of candidate slots (candidate slots).

Optionally, the user equipment determines the set of candidate timeslots such that (sub th) timeslots in the set of candidate timeslots do not coincide with timeslots

Overlapping in the time domain. Wherein the content of the first and second substances,

Or, P _reserve Is equal to

The resource reservation period set represents a subset or a complete set of the resource reservation period set in the resource pool configuration information; optionally, the resource pool configuration information includes the resource reservation period set, where T' _max Indicating the number of slots belonging to the resource pool in 10240ms (SFN/DFN 0-SFN/DFN 1023). k is equal to 1, or a positive integer, or is determined by configuration (or preconfigured) information, as the present invention is not limited in this respect.

[ example four ]

Fig. 5 is a diagram illustrating a basic procedure 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 process diagram shown in fig. 5.

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

in step S301, the higher layer (or upper layer) requests (or triggers) the sidelink communication user equipment (physical layer) to determine the transmission resource of the pscsch/PSCCH.

In step S302, the sidestream user equipment determines a set of candidate slots (candidate slots).

The last time slot in the time domain in the candidate time slot set is recorded as

In step S303, the ue is in a timeslot

The first side communication control information SCI is received.

Wherein, optionally, the first SCI comprises a resource reservation indication field; and, optionally, the value indicated by the resource reservation indication field is P _{rsvp_RX} 。

Optionally, the user equipment assumes (assign) to be in a time slot

Receiving a second SCI identical to the first SCI; wherein, the first and the second end of the pipe are connected with each other,

T′ _max indicating the number of slots belonging to the resource pool within 10240ms (SFN/DFN 0-SFN/DFN 1023). Q =1,2. If it is not

And is provided with

Then

Otherwise Q =1. Wherein, T _scal Represents T2 in the resource selection window;

in step S304, the UE excludes (exclude) one or more candidate single slot resources R _x，y 。

Optionally, the user equipment excludes one or more R _x，y At least the conditions need to be met: the user equipment determines the obtained resource block and time slot set according to the first SCI, and/or determines the obtained resource block and time slot set and the single time slot resource R according to the second SCI _x，y Overlap (overlap).

Fig. 6 is a block diagram showing a user equipment UE according to the present invention. As shown in fig. 6, 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, etc. 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 with reference to preferred embodiments. It will be appreciated by those skilled in the art that the methods shown above are merely exemplary and that the various embodiments described above can be combined with each other without contradiction. 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 be made by those skilled in the art in light of the teachings of the illustrative 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., that 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. The computer program logic, when executed on at least one processor of a computing system, 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:

the high layer requests or triggers the user equipment to determine the transmission resource of PSSCH/PSCCH; and

the user equipment determines a set of candidate timeslots.

2. The method of claim 1,

the resource allocation mode of the user equipment is a resource allocation mode based on partial perception.

3. The method of claim 1,

the manner in which the user equipment determines the set of candidate timeslots is dependent on the user equipment's implementation.

4. The method according to any one of claims 1 to 3,

the high layer requests the user equipment to determine the transmission resources of the PSSCH/PSCCH on a slot n.

5. The method according to any one of claims 1 to 3,

the user equipment determines the candidate timeslot set such that timeslots in the candidate timeslot set are not in common with timeslots

Overlap in the time domain, wherein,

is any one of the set of candidate timeslots;

P _reserve is equal to

Or P _reserve Is equal to

T′ _max Indicates the number of time slots of SFN/DFN0 to SFN/DFN 1023 belonging to the resource pool within 10240 ms;

k is equal to 1, or a positive integer, or determined by configuration or pre-configuration information.

6. The method according to any one of claims 1 to 3,

further comprising: the user equipment determines a set of timeslots to listen to.

7. The method of claim 6,

when the kth bit in a bitmap is set to 1 or 0, the listening slot set listened by the ue at least includes slots

Wherein the content of the first and second substances,

is any one of the set of candidate timeslots;

P _reserve is equal to

Or P _reserve Is equal to

for a set of time slots

Wherein K represents a positive integer,

in said time slot n or

Or alternatively

Or

Or time slot

Or

Or

Or

Previous most recent slot tableShown as

Wherein the content of the first and second substances,

8. The method of claim 6,

the monitoring time slot set monitored by the user equipment at least comprises time slots

Removing time slots that overlap the candidate time slots, wherein,

is any one of the set of candidate timeslots;

P _reserve is equal to

Or P _reserve Is equal to

9. A user equipment, comprising:

a processor; and

a memory storing instructions;

wherein the instructions, when executed by the processor, perform the method of any of claims 1 to 8.