CN112770402A

CN112770402A - Method performed by user equipment and user equipment

Info

Publication number: CN112770402A
Application number: CN201911079863.1A
Authority: CN
Inventors: 赵毅男; 刘仁茂; 罗超
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 2019-11-06
Filing date: 2019-11-06
Publication date: 2021-05-07
Also published as: WO2021088918A1

Abstract

The invention provides a method executed by user equipment and the user equipment, wherein the method comprises the following steps: receiving first side communication configuration information sent by a base station gNB; receiving second side communication configuration information sent by the base station gNB; receiving configuration information of a sidelink communication configuration scheduling permission configured grant sent by the base station gNB; and the user equipment determines the resources of the configuration scheduling permission indicated by the configuration information of the configuration scheduling permission.

Description

Method performed by user equipment and user equipment

Technical Field

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

Background

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

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

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

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

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

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

2) priority handling mechanism for D2D communications.

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

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

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

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

4) V2I, Vehicle t0 Infrastructure, i.e. the Vehicle communicates with the road Infrastructure etc.

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

1) higher density DMRS to support high speed scenarios;

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

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

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

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

In conference 3GPP RAN1 AH #1901 in month 1 of 2019 (see non-patent document 6), the following conference conclusion is reached regarding transmission mode 1 in NR sidelink:

when the NR base station gNB schedules the NR side row communication transmission mode 1, a Type 1configured scheduling grant (Type 1configured grant) and a Type 2configured scheduling grant (Type 2configured grant) are supported.

At the 3GPP RAN1#96bis conference of 4 months in 2019 (see non-patent document 7), the following conference conclusion is reached regarding the configuration scheduling grant in the NR side-line communication:

a type 1 or type 2 configuration scheduling grant in a sidestream communication represents a set (set) of periodic resources for one or more NR side sidestream transmissions.

The scheme of the invention comprises a method for determining resources of configuration scheduling permission of type 1 by user equipment in NR side-line communication.

Documents of the prior art

Non-patent document

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

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

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

Non-patent document 4: RP-170798, New WID on 3GPP V2X Phase 2

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

Non-patent document 6: RAN1 AH #1901, Charrman notes, section 7.2.4.1.4

Non-patent document 7: RAN1#96bis, Chairman nodes, section 7.2.4.2.1

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: receiving first side communication configuration information sent by a base station gNB; receiving second side communication configuration information sent by the base station gNB; and receiving configuration information of a sidestream communication configuration scheduling permission configured grant sent by the base station gNB, wherein the user equipment is sidestream communication user equipment.

According to the method of the first aspect of the present invention, the first sidelink communication configuration information includes configuration information of a sidelink communication resource pool; and/or the configuration information of the sidestream communication resource pool comprises a first configuration period of the resource pool. And the user equipment determines the number of resources belonging to the resource pool in the first configuration period according to the configuration information of the sidestream communication resource pool.

According to the method of the first aspect of the present invention, the second sidelink communication configuration information includes a second configuration period of resources available for sidelink communication transmission. The user equipment determines the number of time slots of resources available for the sidelink communication transmission within the second configuration period.

According to the method of the first aspect of the present invention, the configuration information of the sidestream communication configuration scheduling grant includes a period Periodicity of the configuration scheduling grant; and/or the configuration information of the sideline communication configuration scheduling permission comprises a time domain resource offset timeDomainOffset of the configuration scheduling permission.

The method according to the first aspect of the invention, further comprising: and the user equipment determines the resource of the configuration scheduling permission indicated by the configuration information of the configuration scheduling permission according to the timeDomainOffset, and/or the configuration information of the sideline communication resource pool, and/or the second sideline communication configuration information, and/or the period.

The method according to the first aspect of the invention, further comprising: and the user equipment determines resources for sideline communication transmission according to the configuration information of the sideline communication resource pool, and/or the second sideline communication configuration information, and/or the period.

According to the method of the first aspect of the present invention, the resource transmitted by sidestream communication is a transmission resource corresponding to the configuration scheduling grant indicated by the configuration information of the configuration scheduling grant; and/or the resources transmitted by the sidelink communication are used for transmitting a physical sidelink communication control channel PSCCH and a physical sidelink communication shared channel PSSCH or PSSCH.

A communication device according to a second aspect of the present invention is a communication device having a packet data convergence protocol PDCP entity, comprising: a processor; and a memory storing instructions; wherein the instructions, when executed by the processor, perform the method of the first aspect.

Drawings

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

fig. 1 is a schematic diagram illustrating LTE V2X UE sidelink communications.

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

Fig. 3 is a schematic diagram showing a basic procedure of a method executed by a user equipment in the first embodiment and the second embodiment of the present invention.

Fig. 4 is a schematic diagram showing a basic procedure of a method performed by a user equipment in a third embodiment and a fourth embodiment of the present 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 is to be noted that the present invention is not limited to the following embodiments, but is applicable to more other wireless communication systems, such as a communication system after 5G and a 4G mobile communication system before 5G, and the like.

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

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

LTE: long Term Evolution, Long Term Evolution technology

NR: new Radio, New Wireless, New air interface

PDCCH: physical Downlink Control Channel, Physical Downlink Control Channel

DCI: downlink Control Information, Downlink Control Information

PDSCH: physical Downlink Shared Channel (pdcch)

UE: user Equipment, User Equipment

eNB: evolved NodeB, evolved node B

And g NB: NR base station

TTI: transmission Time Interval, Transmission Time Interval

OFDM: orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing

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

C-RNTI: cell Radio Network Temporary Identifier

CSI: channel State Information, Channel State Information

HARQ: hybrid Automatic Repeat Request (HARQ)

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

CRS: cell Reference Signal, Cell specific Reference Signal

PUCCH: physical Uplink Control Channel, Physical Uplink Control Channel

PUSCH: physical Uplink Shared Channel, Physical Uplink Shared Channel

UL-SCH: uplink Shared Channel, Uplink Shared Channel

CG: configured Grant, configuring scheduling Grant

Sidelink: sidelink communications

SCI: sidelink Control Information, Sidelink communication Control Information

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

MCS: modulation and Coding Scheme, Modulation and Coding Scheme

RB: resource Block, Resource Block

RE: resource Element, Resource Element

CRB: common Resource Block, Common Resource Block

And (3) CP: cyclic Prefix, Cyclic Prefix

PRB: physical Resource Block, Physical Resource Block

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

FDM: frequency Division Multiplexing, Frequency Division Multiplexing

RRC: radio Resource Control, Radio Resource Control

RSRP: reference Signal Receiving Power, Reference Signal Receiving Power

SRS: sounding Reference Signal

DMRS: demodulation Reference Signal

CRC: cyclic Redundancy Check (crc)

PSDCH: physical Sidelink Discovery Channel

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

SFI: slot Format Indication

TDD: time Division Duplexing

FDD: frequency Division Duplexing

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

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

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

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

PCI: physical Cell ID, Physical Cell identity

PSS: primary Synchronization Signal, Primary Synchronization Signal

SSS: secondary Synchronization Signal, Secondary Synchronization Signal

BWP: bandwidth Part, BandWidth fragment/portion

GNSS: global Navigation Satellite positioning System (GNSS)

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

DFN: direct Frame Number, Direct Frame Number

IE: information Element, Information Element

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

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

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

SCG: secondary Cell Group, Secondary Cell Group

PCell: primary Cell, Primary Cell

SCell: secondary Cell, Secondary Cell

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

SPS: semi-persistent Scheduling, Semi-persistent Scheduling

TA: timing Advance, uplink Timing Advance

MAC: medium Access Control, media Access Control layer (protocol)

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

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

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

The uplink and downlink configuration information and the TDD configuration information related in the present invention have the same meaning. The uplink and downlink configuration information and the TDD configuration information in this document may be replaced equivalently. Similarly, the sidelink uplink and downlink configuration information and the sidelink TDD configuration information may be replaced by the same, and both of them have the same meaning.

The TDD configuration information and sidelink TDD configuration information involved in the embodiments of the present invention include at least one TDD configuration pattern. The TDD configuration pattern includes corresponding configuration information, such as a configuration period, a reference subcarrier interval, and the like.

In the description of the present invention, an uplink resource may refer to a sidelink resource, and the sidelink resource may represent an uplink resource. Similarly, the uplink slot resource corresponds to a sidelink slot resource, and the uplink symbol resource corresponds to a sidelink symbol resource.

In the description of the present invention, both the configuration scheduling grant of type 1 and the configuration scheduling grant of type 1 in sidestream communication indicate that the configuration scheduling grant does not require activation (activation) or deactivation (de-activation, or release, release) of the DCI, and after the configuration scheduling grant of type 1 is configured, the MAC entity (MAC entry) of the UE stores the configuration scheduling grant for sidestream communication transmission.

In the description of the present invention, mod represents a remainder calculation, for example, a mod b represents a remainder obtained by dividing a by b.

Scenarios for Sidelink communications

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

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

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

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

Basic procedure for LTE V2X (sidelink) communication

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

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

2) The PSCCH occupies one subframe in the time domain, and the corresponding PSCCH employs Frequency Division Multiplexing (FDM). The PSSCH occupies one or more continuous sub-channels in the frequency domain, and the sub-channels represent n in the frequency domain_subCHsizeA plurality of RB, n in succession_subCHsizeConfigured by RRC parameters, the number of starting sub-channels and consecutive sub-channels is indicated by the frequency domain resource indication field of 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 LTE V2X, when there is eNB network coverage, a base station may configure a resource allocation manner of a UE, or referred to as a transmission mode of the UE, through UE-level proprietary RRC signaling (dedicated RRC signaling) SL-V2X-ConfigDedicated, specifically:

1) resource allocation scheme based on base station scheduling (Transmission Mode 3): the resource allocation method based on base station scheduling represents that the frequency domain resources used by sidelink communication are scheduled by the base station. The transmission mode 3 includes two scheduling modes, namely dynamic scheduling and semi-persistent scheduling (SPS). For dynamic scheduling, the UL grant (DCI 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-rl4 configures one or more (up to 8) configured scheduling grants (configured grants), each configured scheduling grant containing a scheduling grant number (index) and a resource period of the scheduling grant. The UL grant (DCI 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 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 adopts SL-V-RNTI scrambling or adopts SL-SPS-V-RNTI scrambling). The uplink scheduling grant UL grant at least includes scheduling information of psch frequency domain resources in sidelink communication. And when the UE successfully monitors PDCCH or EPDCCH scrambled by SL-V-RNTI or SL-SPS-V-RNTI, taking a PSSCH frequency domain resource indication domain in an uplink scheduling grant UL grant (DCI format 5A) as indication information of a PSSCH frequency domain resource in the PSCCH (SCI format 1), and sending the PSCCH (SCI format 1) and the corresponding PSSCH.

For semi-persistent scheduling SPS in transmission mode 3, the UE receives DCI 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-rl4 indicates that the UE is configured to transmit mode based on UE sending. In the UE sensing-based transmission mode, the base station configures an available transmission resource pool, and the UE determines a sidelink transmission resource of the PSCCH in the transmission resource pool (resource pool) according to a certain rule (for a detailed description of the procedure, see LTE V2X UE sensing procedure part), and transmits the PSCCH (SCI format 1) and the corresponding PSCCH.

NR carrier and sidelink carrier

The carriers referred to in the description of the present invention all represent a segment of contiguous frequency domain resources in the frequency domain. The NR carrier indicates a frequency at which a serving cell serving the UE operates, and on the NR carrier, the UE performs reception of downlink transmission from the base station, uplink transmission of the UE itself, and the like. The Sidelink carrier indicates a frequency at which the UE performs Sidelink communication transmission and reception. The sidelink carrier referred to in the description of the present invention may represent an NR sidelink carrier, or an LTE sidelink carrier. On the NR sidelink carrier wave, the UE transmits and receives NR side row communication; on the LTE sidelink carrier, the UE transmits and receives LTE sidelink communications. The two same carriers represent that the frequency domain resources occupied by the two carriers are completely the same; two carriers are referred to as different carriers if their frequency domain resources do not completely coincide with each other.

Sets of parameters (numerology) in NR (including NR sidelink) and in NR (including NR sidelink) Slot slot

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

TABLE 4.2-1 NR supported subcarrier spacing

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

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

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 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 (60kHz), 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, the numbering range being also 0 to 1023, and the above statements on the relation between system frames and numerology are equally applicable to Direct system frames (Direct Frame), 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.

Indication and determination method of NR TDD configuration information

The NR base station gNB configures the TDD configuration information of the cell level through TDD-UL-DL-ConfigCommon in SIB1, which includes:

● reference subcarrier spacing mu_ref；

● high-level parameters patternl (the information element is optional and represents TDD configuration style 1, the same below), which includes the following high-level parameters:

■ configuration period P (ms);

■ number of downstream time slots d_siotsThe downlink time slot only contains downlink OFDM symbols (which can be called DL-only time slot);

■ number of downlink OFDM symbols d_sym；

■ number u of upstream time slots_slotsThe uplink time slot only contains uplink OFDM symbols (which may be called UL-only time slot);

■ number u of uplink OFDM symbols_sym。

The period of the configuration information is Pms, corresponding to continuous

And a time slot. In S time slots, d is first_slotsA downlink time slot u_slotsThe uplink slots are located at the end of the S slots. d_symOne downlink OFDM symbol is located at d_slotsAfter one downlink time slot, u_symOne uplink OFDM symbol is located at u_slotsBefore one uplink time slot, the rest

Each OFDM symbol is an X symbol (X denotes a flexible symbol). The X symbol may be a downlink symbol, an uplink symbol, or a guard interval symbol between downlink and uplink in different application scenarios. Wherein the content of the first and second substances,for normal cp (normal cp),

for extended cp (extended cp),

the TDD-UL-DL-ConfigCommon in SIBl may contain a higher layer parameter pattern2 (this information element is Optional and indicates TDD configuration pattern2, the same below). The pattern2 and the pattern1 have the same configuration information (the parameters of the pattern2 include the periods P2, d_slots，2，u_slots，2，d_sym，2，u_sym，2) The corresponding parameters are the same as the corresponding patternls. Reference subcarrier spacing mu_refIs the same as pattern1, so the reference subcarrier spacing μ is not repeatedly configured for pattern2_ref. The period of the configuration information is P2 ms, corresponding to continuous

And a time slot. In S2 time slots, d is first_slots，2A downlink time slot u_slots，2The uplink time slots are located at the end of the S2 time slots. d_sym，2After a downlink OFDM symbol is located in a downlink time slot, u_sym，2One uplink OFDM symbol is located before the uplink time slot, and the rest

Each OFDM symbol is an X symbol (X denotes a flexible symbol). The X symbol may be a downlink symbol, an uplink symbol, or a guard interval symbol between downlink and uplink in different application scenarios. Wherein, for normal CP (normal CP),

for extended cp (extended cp),

when the TDD-UL-DL-ConfigCommon includes both pattern1 and pattern2, the TDD configuration information has a configuration period of (P + P2) ms, which includes the above-mentioned S and S2 time slots (S in time domain first, and S2 second).

The periods P and P2 in the configuration information satisfy the following conditions:

1) p is a divisor of 20, i.e. P can be divided by 20, and the first time domain symbol of every 20/P periods is the first symbol of an even frame;

2) p + P2 is a divisor of 20, i.e., P + P2 is divisible by 20, while it is required that the first time domain symbol every 20/(P + P2) cycles is the first symbol of an even frame.

Preferable ranges of P and P2 include {0.5, 0.625, 1, 1.25, 2, 2.5, 5, 10} ms. The values of P and P2 also include 3ms and 4ms, as represented by IE: dl-UL-Transmission permission-v 1530. When the base station configures dl-UL-Transmission permission-v 1530 in pattern1/2, the UE ignores the dl-UL-Transmission permission corresponding to pattern 1/2.

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 (transmission mode 1 in NR 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 (transmission mode 2 in NR sidestream communication), the UEs determine transmission resources in the resource pool.

In the specification of the present invention, the configuration period (or configuration length, or length of configured bitmap) of the sidelink communication resource pool is b_ResourcePoolTo indicate. Optionally, the configuration period is in units of slot slots. At b_ResourcePoolThe number of time slots available for sidelink transmission configured internally adopts a_slotTo indicate. E.g. b_ResourcePoolIs 40, each bit position 1 indicates availability for sidelink transmission (i.e., belongs to the resource pool), at b_ResourcePoolThere are a total of 20 bits set to 1, then a_slot＝20。

After the UE determines the time domain resources of the resource pool (e.g., the time domain resources in slot units in the resource pool), the slot slots in all resource pools (the slot slots in all resource pools within SFN 0 to 1023 or the slot slots in all resource pools within DFNs 0 to 1023) are numbered according to a rule that starts from 0 and continues and increases, which may be represented as s_q(q＝0，1，...，q_max) In the description of the present invention, q is referred to as a logical number (or a local index) of a resource pool.

Resource available for sidelink communication transmission (available resources for sidelink transmission)

The resources available for sidelink communications transmission referred to in the description of the present invention is a superset (superset) of the above-mentioned sidelink communications resource pool, which represents the union of the resource pools of the respective UEs. For example, the base station gNB broadcasts a set of resources available for sidelink communications transmission in the cell, and configures sidelink communications resource pools for the user equipment 1 and the user equipment 2 respectively in the resources available for sidelink communications transmission. The sidelink communication resource pools of the user equipment 1 and the user equipment 2 may overlap or may not overlap on the time frequency resources.

The resources available for sidelink communication transmission may be referred to as sidelink communication slot resources (sidelink slots) for short. Optionally, the base station may indicate sidelink slots in a bitmap manner, or the base station indicates the resources available for sideline communication transmission by an uplink timeslot number (or a sum of the uplink timeslot number and a timeslot number including an X symbol) included in the same form as the NR TDD configuration pattern (pattern), or the base station indicates the resources available for sideline communication transmission by an available timeslot number for sideline communication included in the same form as the NR TDD configuration pattern. For example, the base station indicates a configuration period P, where P corresponds to a configuration period in TDD configuration pattern configuration, and indicates the number of uplink (or available for sidelink communication) timeslots in the period (optionally, only the number of uplink timeslots or available for sidelink communication timeslots may be indicated in the period, which is still described in the same form as the NR TDD configuration pattern in the present specification), and the UE may determine the resources available for sidelink communication transmission.

In the specification of the present invention, the configuration period (or configuration length, or length of configured bitmap) of the resources available for sidelink communication transmission adopts d_AllSlotsTo indicate. At d_AllSlotsInterconfigured number of slots available for sidelink transmission using c_SLSlotsTo indicate. For example, if the same form as the NR TDD configuration pattern described above is used for indication, then,

c_SLSlots＝u_slots. Similarly, if both of the above-described NR TDD configuration patterns 1 and NR TDD configuration patterns 2 are employed, then,

c_SLSlots＝u_slots+u_slots，2. The present invention includes, but is not limited to, the above-described embodiments for the indication of resources available for sidestream communication transmissions.

NR type 1 configuration scheduling grant (CG)

In Rel-15 NR, CG-based PUSCH transmission is simultaneously supported on the basis of supporting DCI dynamic scheduling PUSCH. In the description of the present invention, CG denotes a configured grant, i.e., a scheduling grant representing a configuration. For the NR type 1 configuration scheduling grant, the base station configures CG for the UE through RRC signaling. In the mechanism of configuring the scheduling grant by NR type 1, the UE can transmit PUSCH by using the CG configured by the base station without monitoring the DCI dynamic scheduling including the UL grant. The method specifically comprises the following steps: the base station configures parameters for PUSCH transmission through RRC signaling configuredGrantConfig, wherein the RRC signaling configuredGrantConfig includes RRC-configuredUplinkGrant. The configuration scheduling grant configuredGrantConfig includes at least the time domain resource, the frequency domain resource, and the resource period of the semi-persistent scheduled PUSCH. Wherein the rrc-configurable uplink grant comprises the scheduling of the time domain resource and the frequency domain resource. In type 1CG PUSCH transmission, the UE does not need to monitor an uplink scheduling grant (UL grant) in the DCI, and when the base station configures type 1CG (IE), the UE can transmit the PUSCH by using the configured CG resources

For the configuration scheduling grant of type 1 in NR side row communication, similarly, the base station configures the information of the configuration scheduling grant of type 1 for the UE through RRC signaling, where the configuration information of the configuration scheduling grant also includes the period of the resource. After the base station configures type 1CG, the UE may use the configured CG resource for sidelink communication transmission.

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

[ example one ]

Fig. 3 is a diagram illustrating a basic 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, the ue receives first sidelink communication configuration information sent by the base station gNB.

Optionally, the first sidelink communication configuration information includes configuration information of a sidelink communication resource pool. Optionally, the configuration information of the sidelink communication resource pool includes a first configuration period (or a first configuration length, or a length of a bitmap of the first configuration) b_ResourcePool. Optionally, the UE determines the first configuration period b according to configuration information of the sidelink communication resource pool_ResourcePoolNumber of resources (or number of slots) a belonging to the resource pool within_slot。

In step S102, the ue receives the second sidelink communication configuration information sent by the base station gNB.

Optionally, the second side communication configuration information packetA second configuration period (or a second configuration length or a length of a bitmap of the second configuration) d of resources available for sidelink communication transmission_AllSlots. Optionally, the UE determines the second configuration period d_AllSlotsNumber of resources (or number of slots) c of resources available for the sidelink communication transmission_SLSlots. Optionally, c is_SLSlotsRepresenting said second configuration period d_AllSlotsThe number of uplink timeslots in the uplink, or the number of sidelink communication timeslot resources.

In step S103, the ue receives the configuration information of the sidelink communication configuration scheduling grant sent by the base station gNB.

Optionally, the configuration information of the sidestream communication configuration scheduling grant includes a period Periodicity of the configuration scheduling grant.

Optionally, the configuration information of the sideline communication configuration scheduling grant includes a time domain resource offset timeDomainOffset of the configuration scheduling grant.

In step S104, the user equipment determines the resource of the configuration scheduling grant indicated by the configuration information of the configuration scheduling grant according to the timeDomainOffset, and/or the configuration information of the sideline communication resource pool, and/or the second sideline communication configuration information, and/or the period.

Optionally, the resource configured with the scheduling grant indicated by the configuration information configured with the scheduling grant is a slot resource configured with the scheduling grant.

Optionally, the condition that the timeslot resource configured with the scheduling grant satisfies is: q ═ Q (timeDomainOffset + N × period) mod Q_maxEither the first or the second substrate is, alternatively,

alternatively, the first and second electrodes may be,

alternatively, the first and second electrodes may be,

wherein, optionally, q represents a logical number of the slot resource of the configuration scheduling grant in the resource pool, and N represents any integer greater than or equal to 0. Wherein, optionally,

alternatively, the first and second electrodes may be,

alternatively, the first and second electrodes may be,

wherein, numberOfSlotsPerD irectFrame (or adopting

Wherein 15k × 2^μHz represents the subcarrier interval corresponding to the sideline communication carrier) represents the number of slot slots in one system Frame (or one Direct system Frame).

[ example two ]

Fig. 3 is a diagram showing 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:

Optionally, the first sidelink communication configuration information includes configuration information of a sidelink communication resource pool. Optionally, the side trafficThe configuration information of the information resource pool comprises a first configuration period (or a first configuration length or a length of a bit map of the first configuration) b_ResourcePool. Optionally, the UE determines the first configuration period b according to configuration information of the sidelink communication resource pool_ResourcePoolNumber of resources (or number of slots) a belonging to the resource pool within_slot。

Optionally, the second sidelink communication configuration information includes a second configuration period (or a second configuration length, or a length of a bitmap of the second configuration) d of resources available for sidelink communication transmission_AllSlots. Optionally, the UE determines the second configuration period d_AllSlotsNumber of resources (or number of slots) c of resources available for the sidelink communication transmission_SLSlots. Optionally, c is_SLSlotsRepresenting said second configuration period d_AllSlotsThe number of uplink timeslots in the uplink, or the number of sidelink communication timeslot resources.

Optionally, said configuring scheduling grantsThe time slot resources meet the following conditions:

alternatively, the first and second electrodes may be,

alternatively, the first and second electrodes may be,

alternatively, the first and second electrodes may be,

alternatively, the first and second electrodes may be,

alternatively, the first and second electrodes may be,

optionally, the DFN and the slot number in the directframe respectively indicate a system frame number where the slot resource configured with the scheduling grant is located and a slot number in the system frame (or a direct system frame number and a slot number in the direct system frame), and N indicates any integer greater than or equal to 0. Wherein, the numberOfSlotsPerDirectFrame (or the use of

[ 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 ue receives first sidelink communication configuration information sent by the base station gNB.

In step S202, the ue receives the second sidelink configuration information sent by the base station gNB.

Optionally, the second sidelink communication configuration information includes a second configuration period (or a second configuration length, or a length of a bitmap of the second configuration) d of resources available for sidelink communication transmission_AllSlots. Optionally, the UE determines the second configuration period d_AllSlotsNumber of resources (or number of slots) c of resources available for the sidelink communication transmission_SLSlots. Optionally, c is_SLSlotsRepresenting said second configuration period d_AllSlotsNumber of upstream time slots in, or sidestream communication time slotsThe amount of resources.

In step S203, the ue receives the configuration information of the sidelink communication configuration scheduling grant sent by the base station gNB.

In step S204, the ue determines resources for sideline communication transmission according to the configuration information of the sideline communication resource pool, and/or the second sideline communication configuration information, and/or the period.

Optionally, the resources of the sidelink communication transmission are used for transmitting PSCCH/PSCCH, or PSCCH.

Optionally, the resource for sidelink communication transmission is a transmission resource corresponding to the configuration scheduling grant indicated by the configuration information of the configuration scheduling grant.

Optionally, the transmission mode of the user equipment is a transmission mode based on base station scheduling (transmission mode 1).

Optionally, if the time domain resource (or timeslot resource) of the PSCCH/PSCCH (or PSCCH) transmission determined by the ue corresponds to a logical number m in a resource pool, the logical number in the resource pool is (m + j × periodic), or,

alternatively, the first and second electrodes may be,

alternatively, the first and second electrodes may be,

is also a transmission resource corresponding to the configuration scheduling grant (optionally, frequency domain resources corresponding to the time slot resources with different logic numbers, or sub-channels of the sub-channels are the same, or different). Wherein j represents an integer greater than or equal to 1.

[ example four ]

Fig. 4 is not intended to illustrate a basic procedure of a method performed by a user equipment of the 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:

Optionally, the second sidelink communication configuration information includes a second configuration period (or a second configuration length, or a length of a bitmap of the second configuration) d of resources available for sidelink communication transmission_AllSlots，1And/or a third configuration period (or a third configuration length or a length of a bitmap of the third configuration) d of resources available for sidelink communication transmission_AllSlots，2. Optionally, the UE determines the second configuration period d_AllSlots，1And the third configuration period d_AllSlots，2In (wherein, d)_AllSlots＝d_AllSlots，1+d_AllSlots，2) The number of resources (or, the number of time slots) c of the resources available for the sidelink communication transmission_SLSlots. Optionally, c is_SLSlotsRepresenting said second configuration period d_AllSlots，1The number of uplink timeslots in, or,number of sidelink communication time slot resources c_SLSlots，1And the third configuration period d_AllSlots，2The number of uplink time slots in the uplink or the number of sidelink communication time slot resources c_SLSlots，2Sum of (i) i.e. c_SLSlots＝c_SLSlots，1+c_SLSlots，2。

alternatively, the first and second electrodes may be,

alternatively, the first and second electrodes may be,

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, among others. The memory 802 has stored thereon program instructions. Which when executed by the processor 801 may perform the above-described method performed by the user equipment as described in detail herein.

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

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

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

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

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

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

Claims

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

receiving first side communication configuration information sent by a base station gNB;

receiving second side communication configuration information sent by the base station gNB;

and receiving configuration information of the sidelink communication configuration scheduling permission configured grant sent by the base station gNB.

2. The method of claim 1,

the first sidelink communication configuration information comprises configuration information of a sidelink communication resource pool; and/or

The configuration information of the sideline communication resource pool comprises a first configuration period of the resource pool.

3. The method of claim 2, further comprising,

and the user equipment determines the number of resources belonging to the resource pool in the first configuration period according to the configuration information of the sidestream communication resource pool.

4. The method of claim 1,

the second sidelink communication configuration information includes a second configuration period of resources available for sidelink communication transmission.

5. The method of claim 4, further comprising,

the user equipment determines the number of time slots of resources available for the sidelink communication transmission within the second configuration period.

6. The method of claim 1,

the configuration information of the sidestream communication configuration scheduling permission comprises the period Periodicity of the configuration scheduling permission; and/or

The configuration information of the sideline communication configuration scheduling permission comprises a time domain resource offset timeDomainOffset of the configuration scheduling permission.

7. The method of claim 1, further comprising,

and the user equipment determines the resource of the configuration scheduling permission indicated by the configuration information of the configuration scheduling permission according to the timeDomainOffset, and/or the configuration information of the sideline communication resource pool, and/or the second sideline communication configuration information, and/or the period.

8. The method of claim 1, further comprising,

and the user equipment determines resources for sideline communication transmission according to the configuration information of the sideline communication resource pool, and/or the second sideline communication configuration information, and/or the period.

9. The method of claim 8,

the resource transmitted by the sidestream communication is a transmission resource corresponding to the configuration scheduling permission indicated by the configuration information of the configuration scheduling permission; and/or

The resources transmitted by the sidestream communication are used for transmitting a physical sidestream communication control channel PSCCH and a physical sidestream communication shared channel PSSCH, or the PSSCH.

10. 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 9.