CN114765750A

CN114765750A - Method performed by user equipment and user equipment

Info

Publication number: CN114765750A
Application number: CN202110048307.9A
Authority: CN
Inventors: 赵毅男; 罗超; 刘仁茂
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 2021-01-14
Filing date: 2021-01-14
Publication date: 2022-07-19
Also published as: WO2022152163A1

Abstract

The invention provides a method executed by user equipment and the user equipment, wherein the method comprises the following steps: a higher or upper layer of the user equipment requesting a physical layer to determine a subset of sidestream communication resources; the user equipment re-evaluates.

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 equipments directly communicate with each other without forwarding through a base station or a core network. Research topics regarding the implementation of the near D2D communication service using LTE devices were approved at RAN #63 congress of 3rd Generation Partnership Project (3 GPP) 3rd month 2014 (see non-patent document 1). Functions introduced by LTE Release 12D2D 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 13eD2D include:

1) D2D discovery for 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 in the 3GPP RAN #68 times congress in 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 13D2D (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 14V2X 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).

The 5G NR V2X topic supports resource allocation mode 2(resource allocation mode 2) based on user equipment sensing (sensing), or 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 for sidelink communication transmission after obtaining the report of the physical layer. For the selected sidelink communication resource (or the selected sidelink communication resource grant), the upper layer re-evaluates (re-evaluating) part or all of the sidelink communication resources.

The scheme of the patent mainly comprises a method for determining triggering reevaluation moment by user equipment and a method for determining whether to reevaluate the side communication resource or not by the user equipment.

Documents of the prior art

Non-patent literature

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 pro posal: 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 student on NR V2X

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: a higher or upper layer of the user equipment requesting a physical layer to determine a subset of sidestream communication resources; the user equipment re-evaluates.

According to the above method of the first aspect of the present invention, the higher layer or the upper layer selects the sidestream communication resource among the sidestream communication resource subset.

According to the method of the first aspect of the present invention, the selected sidestream communication resource is a selected sidestream communication scheduling grant.

According to the above method of the first aspect of the present invention, the higher layer or upper layer requests or triggers the process of determining the subset of sidestream communication resources on slot n.

According to the above method of the first aspect of the present invention, the ue re-evaluates one or more resources in the selected sidestream traffic scheduling grant, the ue first indicating the one or more resources on slot m.

According to the above method of the first aspect of the present invention, if the slot n is earlier in time domain than the timeslot

The user equipment is in the time slot

Re-evaluating the one or more resources, wherein,

representing a first processing delay.

According to the above method of the first aspect of the present invention, if the slot n is later than or equal to the slot n in the time domain

The user equipment does not re-evaluate the one or more resources, wherein,

representing a first processing delay.

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 the method according to any of the above first aspects of the invention.

The invention has the advantages of

According to the scheme of the patent, in the NR V2X sidelink communication, for the resource allocation method 2 based on ue sensing, the scheme of the present invention can ensure that, for sidelink communication resources selected by an upper layer, the time of triggering re-evaluation occurs after the time of triggering sensing and selecting the sidelink communication resources, so that re-evaluation of the sidelink communication resources can be effectively performed, and the efficiency of ue sensing and the transmission reliability of sidelink communication are 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 illustrating a basic procedure of the method performed by the user equipment in the first and second embodiments of the present invention.

Fig. 4 is a schematic diagram showing the basic procedure of the method performed by the user equipment in the third and fourth embodiments of the invention.

Fig. 5 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 should 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.

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 Partnership Project, third Generation Partnership Project

Long Term Evolution (LTE) Long Term Evolution (Term Evolution)

New Radio, New Wireless, New air interface

Physical Downlink Control Channel (PDCCH), Physical Downlink Control Channel

DCI Downlink Control Information

PDSCH Physical Downlink Shared Channel (PDSCH)

User Equipment, UE

eNB EVOLVED NodeB, evolved node B

gNB NR base station

TTI, Transmission Time Interval

OFDM Orthogonal Frequency Division Multiplexing

CP-OFDM, Cyclic Prefix Orthogonal Frequency Division Multiplexing with Cyclic Prefix

C-RNTI Cell Radio Network Temporary Identifier

Channel State Information (CSI)

Hybrid Automatic Repeat Request (HARQ)

Channel State Information Reference Signal (CSI-RS), Channel State Information Reference Signal (CSI-RS)

CRS Cell Reference Signal, Cell specific Reference Signal

Physical Uplink Control Channel (PUCCH)

Physical Uplink Shared Channel (PUSCH), Physical Uplink Shared Channel (PUCCH)

UL-SCH an Uplink Shared Channel (UL-SCH)

CG, Configured Grant, configuring scheduling Grant

Sidelink communication

Sidelink Control Information, sideline communication Control Information

Physical Sidelink Control Channel, Physical Sidelink communication Control Channel

Modulation and Coding Scheme (MCS), Modulation and Coding Scheme

RB Resource Block, Resource Block

RE Resource Element, Resource Element

Common Resource Block (CRB), Common Resource Block

CP Cyclic Prefix, Cyclic Prefix

PRB Physical Resource Block

PSSCH Physical Sidelink Shared Channel

FDM Frequency Division Multiplexing

RRC Radio Resource Control

Reference Signal Receiving Power, Reference Signal Receiving Power

Sounding Reference Signal (SRS)

Demodulation Reference Signal (DMRS), Demodulation Reference Signal

Cyclic Redundancy Check (CRC)

PSDCH Physical Sidelink Discovery Channel

PSBCH Physical Sidelink Broadcast Channel

SFI Slot Format Indication

TDD Time Division Duplexing

FDD Frequency Division Duplexing, Frequency Division Duplexing

SIB1 System Information Block Type 1, System Information Block Type 1

Sidelink synchronization Signal, sideline communication synchronization Signal

PSSS Primary silicon Synchronization Signal, Primary Synchronization Signal for sideline communication

SSSS, Secondary site Synchronization Signal, side-line communication auxiliary Synchronization Signal

PCI Physical Cell ID, Physical Cell identity

Primary Synchronization Signal, Primary Synchronization Signal

SSS, Secondary Synchronization Signal

Bandwidth Part, BandWidth fragment/portion, BWP

GNSS, Global Navigation Satellite System, Global Navigation Satellite positioning System

SFN System Frame Number, System (radio) Frame Number

Direct Frame Number, Direct Frame Number

Information Element, Information Element

SSB Synchronization Signal Block, Synchronization System information Block

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

Master Cell Group, Master Cell Group

SCG, Secondary Cell Group

Primary Cell, Primary Cell

SCell, Secondary Cell

Physical Sidelink Feedback Channel, Physical Sidelink communication Feedback Channel

Semi-persistent Scheduling (SPS)

TA Timing Advance, uplink Timing Advance

Phase-Tracking Reference Signals, PT-RS

Transport Block, Transport Block

Code Block, Code Block/Code Block

QPSK Quadrature Phase Shift Keying

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

AGC (Auto Gain Control), automatic Gain Control

TDRA (field) Time Domain Resource Assignment, Time Domain Resource allocation indication (field)

FDRA (field) Frequency Domain Resource Assignment indication (field)

Absolute Radio Frequency Channel Number, Absolute Radio Frequency Channel Number

SC-FDMA, Single Carrier-Frequency Division Multiple Access

Medium Access Control, MAC

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 referred to in the specification may indicate a transmission mode, and the transmission mode referred to may indicate a resource allocation. 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 awareness (sensing) and resource selection.

The PSCCH in the description of the present invention is used to carry SCI. The PSCCHs corresponding to, or related to, or scheduled pschs referred to in the description of the present invention all have the same meaning, and all represent associated pschs or correlated PSCCHs. 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-level SCI, referred to as the 1st stage SCI or SCI format 0-1, is transmitted in the PSCCH; the second level SCI is called 2nd stage SCI or SCI format 0-2, and is transmitted in the resource of the corresponding PSSCH.

The selected sidelink communication resource referred to in the description of the present invention also means a selected sidelink communication resource scheduling grant (selected sidelink grant), and the present invention is not limited thereto.

The upper layer and the upper layer in the description of the present invention may refer to a MAC layer or other layers, which is not limited in this respect.

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" at a frequency where sidelink communications are desired, indicating that the UE has network coverage).

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

From the UE side, the UE only has 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. 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 SCIformat 1, where SCIformat 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 SCIformat 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 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 mode 4 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 proprietary 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 indicates 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 format 5A) includes frequency domain resources of the pscch, and the CRC of the PDCCH or EPDCCH carrying the DCI format 5A is scrambled by the 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 (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 the DCI format 5A is scrambled by SL-SPS-V-RNTI.

Specifically, when the RRC signaling SL-V2X-ConfigDedicated is 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 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 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 DCI format 5A scrambled by SL-SPS-V-RNTI 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 when set to UE-Selected-r14 indicates that the UE is configured to transmit mode based on UE sending. In the UE sending-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 description of the process, see LTE V2X UE sending process), 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.

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 and 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 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.

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

In the range of 0 to

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

In the range of 0 to

Wherein,

and

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

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

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

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 sidestream communication, the numbering range being equally 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 time duration equal to equally 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, and normal CP is also supported. 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 block RB and resource element 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^μThe resource element RE represents 1 subcarrier in the frequency domain and 1 OFDM symbol in the time domain.

NR collateral communication resource allocation mode 2 and resource re-evaluation (re-evaluation)

The 5G NR V2X topic supports resource allocation mode 2(resource allocation mode 2) based on user equipment sensing (sensing), or 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 set of available transmission resources to the upper layer. After obtaining the report of the physical layer, the upper layer selects the resource for sidelink communication transmission or selects a sidelink communication scheduling permission.

In the resource allocation manner 2, re-evaluation (re-evaluation) of the transmission resource selected by the upper layer is supported, that is, before the time at which the transmission resource is located comes, sensing (sensing) is performed again on the selected transmission resource to determine whether the transmission resource is still available.

The sensing (sensing) performed by the upper layer triggered physical layer may also be referred to as an upper layer request (request) physical layer determining resource subsets (subsets) in which the upper layer selects sidelink communication resources for psch/PSCCH transmission.

Processing time delay of resource allocation mode 2 in NR (noise-and-noise) sideline communication

In the description of the invention, at least two processing delays are involved:

and

and

is shown below, wherein, mu_SLInformation indicating the subcarrier spacing for sidelink communications.

Table 1:

value of

Table 2:

value of

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 a first embodiment of the present invention, the steps performed by the user equipment include:

in step S101, optionally, a higher layer (or, an upper layer) of the sidestream communication user equipment requests the physical layer to determine a sidestream communication resource subset (subsets of resources).

Wherein,

the higher layer (or upper layer) selects a sidelink communications resource in the sidelink communications resource subset, optionally for transmission of a physical sidelink communications shared channel PSCCH and a physical sidelink communications control channel PSCCH,

and the number of the first and second groups,

optionally, the selected sidelink communication resource is referred to as a selected sidelink communication scheduling grant (selected sidelink grant).

Optionally, the higher layer requests (or triggers trigger) the process of determining a subset of sideline communications resources over a slot n.

In step S102, the user equipment performs re-evaluation (re-evaluation).

Wherein,

optionally, the user equipment reevaluates one or more resources in the selected sidestream communication scheduling grant. Wherein the user equipment indicates (signal at first time) the one or more resources for the first time on slot m.

Optionally, if the slot n is earlier in time domain than the slot

Then, the user equipment is in the time slot

The one or more resources are re-evaluated. Wherein,

representing a first processing delay.

[ 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:

Wherein,

the higher layer (or upper layer) selects the sidelink communications resource in the sidelink communications resource subset, optionally for transmission of a physical sidelink communications shared channel PSSCH and a physical sidelink communications control channel PSCCH,

and (c) a second step of,

alternatively, the selected sidelink communications resource is referred to as a selected sidelink communications scheduling grant (selected sidelink grant).

Optionally, the higher layer requests (or triggers trigger) the process of determining the subset of sidelink communication resources on a slot n.

In step S102, the user equipment performs re-evaluation (re-evaluation).

Wherein,

optionally, the user equipment reevaluates one or more resources in the selected sidestream communication scheduling grant. Wherein the user equipment indicates (signal at first time) the one or more resources for the first time on a slot m.

Optionally, if the slot n is later in time (or equal) than the slot n

Then the user equipment does not re-evaluate the one or more resources.

[ 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 the third embodiment of the present invention, the steps performed by the user equipment include:

in step S201, the higher layer of the user equipment (for the physical layer) provides parameters for psch/PSCCH transmission.

Wherein,

optionally, the user equipment provides the parameter for psch/PSCCH transmission on a slot n.

Optionally, the resource allocation manner of the user equipment is a resource allocation manner based on user equipment perception.

Optionally, the parameter for PSSCH/PSCCH transmission comprises at least the number L of sub-channels for PSSCH/PSCCH transmission_subCH。

In step S202, the user equipment determines (or identifies) candidate resources (candidate resources).

Optionally, a single-slot candidate resource (candidate-slot resource) is defined as any slot in the resource pool

The L of_subCHA number of consecutive sub-channels; and, optionally, the user equipment considers (or, supposing, assign) at time intervals [ the n + T1, the n + T2 [ ]]Any of the L's (in any time slot) contained in the resource pool_subCHEach of the successive sub-channels corresponds to a single slot candidate resource, and the elimination (except) is performed in the time interval [ said n + T1, said

]Within the time slot. Wherein T1 denotes a first time interval, T2 denotes a second time interval,

indicating a first processing delay and, optionally,

[ example four ]

Fig. 4 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. 4.

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

Wherein,

optionally, the user equipment provides the parameter for psch/PSCCH transmission on slot n.

L of_subCHA number of consecutive sub-channels; and, optionally, the user equipment considers (or, assumes) at a time interval [ the

The n + T2]Any of the L's (in any time slot) contained in the resource pool_subCHEach of the consecutive sub-channels corresponds to a single-slot candidate resource, where T2 denotes a first time interval,

representing a first processing delay.

Fig. 5 is a block diagram showing a user equipment UE according to the present invention. As shown in fig. 5, 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 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 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 sending, 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 present integrated circuit has appeared due to the progress of semiconductor technology, the present invention can also use the integrated circuit obtained by using the advanced technology.

Although the present invention has been shown in connection with the preferred embodiments of the present invention, those skilled in the art will appreciate that various modifications, substitutions and changes can be made thereto without departing from the spirit and scope of the present 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:

a higher or upper layer of the user equipment requesting a physical layer to determine a subset of sidestream communication resources;

the user equipment re-evaluates.

2. The method of claim 1,

the higher layer or upper layer selects sidelink communications resources from the sidelink communications resource subset.

3. The method of claim 2,

the selected sidestream communication resource is a selected sidestream communication scheduling grant.

4. The method of claim 3,

the higher layer or upper layer requests or triggers the process of determining the subset of sidestream communication resources on slot n.

5. The method of claim 4,

the user equipment reevaluates one or more resources in the selected sidestream communication scheduling grant,

the user equipment indicates the one or more resources for the first time on a slot m.

6. The method of claim 5,

if the time slot n is earlier than the time slot in the time domain

The user equipment is in the time slot

The one or more resources are re-evaluated,

wherein,

representing a first processing delay.

7. The method of claim 5,

if the time slot n is later than or equal to the time slot in the time domain

The user equipment does not re-evaluate the one or more resources,

wherein,

representing a first processing delay.

8. 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 7.