WO2022007664A1

WO2022007664A1 - Method executed by user equipment, and user equipment

Info

Publication number: WO2022007664A1
Application number: PCT/CN2021/103093
Authority: WO
Inventors: 赵毅男; 刘仁茂; 罗超
Original assignee: 夏普株式会社; 赵毅男
Priority date: 2020-07-08
Filing date: 2021-06-29
Publication date: 2022-01-13
Also published as: CN113923629A

Abstract

Provided are a method executed by a user equipment, and a user equipment. The method comprises the following steps: a user equipment receiving a system information block sent by a base station, wherein the system information block includes configuration information ul-CarrierFreq or v2x-CommCarrierFreq-r14 of a sidelink communication carrier frequency; the user equipment using a carrier frequency corresponding to the configuration information ul-CarrierFreq or v2x-CommCarrierFreq-r14 of the sidelink communication carrier frequency to perform sidelink communication; and the user equipment receiving downlink control information (DCI).

Description

Method performed by user equipment and user equipment

technical field

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

Background technique

In traditional cellular networks, all communications must go through base stations. The difference is that D2D communication (Device-to-Device communication, direct device-to-device communication) refers to a direct communication method between two user equipments without being forwarded by a base station or a core network. At the RAN#63 plenary meeting of the 3rd Generation Partnership Project (3GPP) in March 2014, a research topic on implementing adjacent D2D communication services using LTE equipment was approved (see Non-Patent Document 1). Features introduced in LTE Release 12 D2D include:

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

2) Direct broadcast communication (Broadcast) function between adjacent devices;

3) The upper layer supports unicast (Unicast) and multicast (Groupcast) communication functions.

At the 3GPP RAN#66 plenary meeting in December 2014, a research project for enhanced LTE eD2D (enhanced D2D) was approved (see Non-Patent Document 2). The main features introduced by LTE Release 13 eD2D include:

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

2) The priority processing mechanism of D2D communication.

Based on the design of the D2D communication mechanism, at the RAN#68 plenary meeting of 3GPP in June 2015, the V2X feasibility study topic based on D2D communication was approved. V2X stands for Vehicle to everything, hoping to realize the exchange of information between vehicles and all entities that may affect vehicles, with the purpose of reducing accidents, slowing traffic congestion, reducing environmental pollution and providing other information services. The application scenarios of V2X mainly include four aspects:

1) V2V, Vehicle to Vehicle, that is, vehicle-to-vehicle communication;

2) V2P, Vehicle to Pedestrian, that is, the vehicle sends a warning to pedestrians or non-motor vehicles;

3) V2N, Vehicle to Network, that is, the vehicle is connected to the mobile network;

4) V2I, Vehicle to Infrastructure, that is, communication between vehicles and road infrastructure.

3GPP divides the research and standardization of V2X into three stages. The first phase was completed in September 2016, mainly focusing on V2V, based on LTE Release 12 and Release 13 D2D (also known as sidelink communication), that is, the development of proximity communication technology (see Non-Patent Document 3). V2X stage 1 introduces a new D2D communication interface called the PC5 interface. The PC5 interface is mainly used to solve the communication problems of cellular vehicle networking in high-speed (up to 250 km/h) and high-node density environments. Vehicles can interact with information such as position, speed and direction through the PC5 interface, that is, vehicles can communicate directly through the PC5 interface. Compared with the proximity communication between D2D devices, the functions introduced by LTE Release 14 V2X mainly include:

1) Higher density DMRS to support high-speed scenarios;

2) Introduce sub-channels to enhance resource allocation;

3) Introduce a user equipment sensing mechanism with semi-persistent scheduling.

The second phase of the V2X research topic belongs to the research scope of LTE Release 15 (see Non-Patent Document 4). The main features introduced include high-order 64QAM modulation, V2X carrier aggregation, short TTI transmission, and a feasibility study of transmit diversity.

At the 3GPP RAN#80 plenary meeting in June 2018, the corresponding third-phase V2X feasibility study topic based on 5G NR network technology (see Non-Patent Document 5) was approved. In the 5G V2X standardization research project, the NR base station gNB is supported to schedule sideline communication user equipment to perform sideline communication in LTE sideline communication transmission mode 3 (mode 3, which only includes the case of semi-persistent scheduling SPS).

At the 3GPP RAN1#97 meeting in May 2019 (see Non-Patent Document 6), regarding the scheduling of LTE sideline communication transmission mode 3 by the NR base station gNB, the following meeting conclusions were reached:

■SPS semi-persistent scheduling in the activation/deactivation of LTE sideline communication based on RRC signaling is not supported.

■ Supports SPS semi-persistent scheduling in LTE sideline communication based on DCI indication activation/deactivation.

NR base station gNB activates/deactivates SPS semi-persistent scheduling in LTE sideline communication through DCI based on UE capabilities;

The above-mentioned DCI provides the indication field related to the LTE sideline communication SPS in LTE DCI format 5A;

The number of bits (size) of the DCI defined in the above-mentioned DCI and NR sideline communication by gNB scheduling NR sideline communication is the same;

• Activation/deactivation is applied to the first LTE subframe (Z+X)ms after receiving the above DCI.

○Z represents the time length offset in LTE sideline communication.

The solution of this patent mainly includes a method for the LTE sideline communication user equipment to determine the carrier (frequency) where the sideline communication is located when the NR base station gNB schedules the LTE sideline communication user equipment to perform the sideline communication of the LTE sideline communication transmission mode 3.

prior art literature

Non-patent literature

Non-patent document 1: RP-140518, Work item proposal 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 literature 3: RP-152293, New WI proposal: 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#97, Chairman notes, section 7.2.4.7

SUMMARY OF THE INVENTION

In order to solve at least a part of the above problems, the present invention provides a method performed by a user equipment and a user equipment.

According to a first aspect of the present invention, there is provided a method performed by a user equipment, comprising the following steps:

The user equipment receives a system information block sent by the base station, where the system information block includes configuration information ul-CarrierFreq or v2x-CommCarrierFreq-r14 of a carrier frequency of sideline communication;

The user equipment performs sidelink communication using the carrier frequency corresponding to the configuration information ul-CarrierFreq or v2x-CommCarrierFreq-r14 of the carrier frequency of one sidelink communication;

The user equipment receives downlink control information DCI.

In the above method performed by the user equipment, preferably, the system information block is an NR system information block 13, namely SIB13, and the SIB13 includes configuration information s1-V2X-ConfigCommon-r16 of LTE sideline communication.

In the above method performed by the user equipment, preferably, the configuration information of the LTE sideline communication includes the LTE sideline communication carrier frequency list v2x-InterFreqInfoList-r14;

Each sideline communication carrier frequency SL-InterFreqInfoV2X-r14 included in the LTE sideline communication carrier frequency list corresponds to an ARFCN type configuration information v2x-CommCarrierFreq-r14, and corresponds to a carrier bandwidth configuration information.

In the above method performed by the user equipment, preferably, the configuration information of the LTE sidelink communication includes configuration information of the LTE sidelink communication resource pool.

In the above method performed by the user equipment, preferably, the system information block includes configuration information sl-Bandwidth-r16 of a carrier bandwidth.

In the above method performed by the user equipment, preferably, the bandwidth of the carrier corresponding to the configuration information ul-CarrierFreq or v2x-CommCarrierFreq-r14 of the one sideline communication carrier frequency is the sl-Bandwidth-r16.

In the above method performed by the user equipment, preferably, the user equipment uses a carrier frequency corresponding to the carrier frequency included in the LTE sideline communication carrier frequency list v2x-InterFreqInfoList-r14 or the one sideline communication carrier frequency The configuration information ul-CarrierFreq or v2x-CommCarrierFreq-r14 corresponds to the carrier frequency corresponding to the carrier frequency corresponding to the resource pool indicated by the configuration information of the LTE sidelink communication resource pool for sidelink communication.

In the above method performed by the user equipment, preferably, the DCI includes a sideline communication carrier indication field, and the indication field is 3 bits,

The indication field equal to 0 corresponds to the sideline communication carrier corresponding to the configuration information ul-CarrierFreq or v2x-CommCarrierFreq-r14 of the one sideline communication carrier frequency,

When the indication field is greater than 0, the value of the indication field corresponds to the corresponding sideline communication carrier frequency SL-InterFreqInfoV2X-r14.

In the above method performed by the user equipment, preferably, the configuration information ul-CarrierFreq or v2x-CommCarrierFreq-r14 of one sideline communication carrier frequency is an ARFCN type of configuration information.

According to a second aspect of the present invention, a user equipment is provided, comprising:

processor; and

memory, storing instructions,

The instructions, when executed by the processor, cause the user equipment to perform a method according to the above.

The beneficial effects of the present invention

The solution of the present invention includes a method for the LTE sidelink communication user equipment to determine the carrier (frequency) where the sidelink communication is located when the NR base station schedules the LTE sidelink communication user equipment to perform the sidelink communication of the LTE sidelink communication transmission mode 3. According to the method of the present invention, the NR base station can schedule the user equipment to perform LTE sidelink communication. At the same time, the NR base station can schedule the LTE sidelink communication user equipment to perform sidelink communication on the carrier frequency covered by the LTE cell, realizing spectrum sharing between LTE uplink and downlink communication and LTE sidelink communication, improving spectrum utilization efficiency and improving communication. quality.

Description of drawings

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

FIG. 1 is a schematic diagram illustrating sideline communication of an LTE V2X UE.

FIG. 2 is a schematic diagram illustrating a resource allocation manner of LTE V2X.

FIG. 3 is a schematic diagram illustrating a basic process of a method performed by a user equipment in Embodiment 1 of the invention.

Fig. 4 is a schematic diagram showing the basic process of the method executed by the user equipment in the second embodiment of the invention.

FIG. 5 is a schematic diagram illustrating a basic process of a method executed by a user equipment in Embodiment 3 of the invention.

FIG. 6 is a block diagram illustrating a user equipment according to an embodiment of the present invention.

detailed description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. 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 in order to avoid obscuring the understanding of the present invention.

Hereinafter, the 5G mobile communication system and its subsequent evolved versions are used as an example application environment to specifically describe various embodiments according to the present invention. However, it should be pointed out that the present invention is not limited to the following embodiments, but can be applied to more other wireless communication systems, such as communication systems after 5G and 4G mobile communication systems before 5G.

Part of the terms involved in the present invention are described below. Unless otherwise specified, the terms involved in the present invention are defined here. The terms given in the present invention may adopt different naming methods in LTE, LTE-Advanced, LTE-Advanced Pro, NR and later communication systems, but unified terms are adopted in the present invention. When applied to a specific system, Can be substituted with the term used in the corresponding system.

3GPP: 3rd 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, physical downlink shared channel

UE: User Equipment, user equipment

eNB: evolved NodeB, evolved base station

gNB: 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, Orthogonal Frequency Division Multiplexing with Cyclic Prefix

C-RNTI: Cell Radio Network Temporary Identifier, the temporary identifier of the cell wireless network

CSI: Channel State Information, channel state information

HARQ: Hybrid Automatic Repeat Request, hybrid automatic repeat request

CSI-RS: Channel State Information Reference Signal, channel state information reference signal

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, configure scheduling permission

Sidelink: Sideline Communication

SCI: Sidelink Control Information, side 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 unit

CRB: Common Resource Block, common resource block

CP: Cyclic Prefix, cyclic prefix

PRB: Physical Resource Block, physical resource block

PSSCH: Physical Sidelink Shared Channel, Physical Sidelink Shared Channel

FDM: Frequency Division Multiplexing, frequency division multiplexing

RRC: Radio Resource Control, Radio Resource Control

RSRP: Reference Signal Receiving Power, reference signal receiving power

SRS: Sounding Reference Signal, sounding reference signal

DMRS: Demodulation Reference Signal, demodulation reference signal

CRC: Cyclic Redundancy Check, Cyclic Redundancy Check

PSDCH: Physical Sidelink Discovery Channel, Physical Sidelink Communication Discovery Channel

PSBCH: Physical Sidelink Broadcast Channel, Physical Sidelink Communication Broadcast Channel

SFI: Slot Format Indication, 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

SLSS: Sidelink synchronization Signal, side communication synchronization signal

PSSS: Primary Sidelink Synchronization Signal, side communication main synchronization signal

SSSS: Secondary Sidelink Synchronization Signal, side communication auxiliary synchronization signal

PCI: Physical Cell ID, physical cell identification

PSS: Primary Synchronization Signal, the main synchronization signal

SSS: Secondary Synchronization Signal, secondary synchronization signal

BWP: BandWidth Part, Bandwidth Fragment/Part

GNSS: Global NaVigation Satellite System, global navigation satellite positioning system

SFN: System Frame Nuimber, system (wireless) frame number

DFN: Direct Frame Number, direct frame number

IE: Information Element, information element

SSB: Synchronization Signal Block, synchronization system information block

EN-DC: EUTRA-NR Dual Connection, LTE-NR dual connection

MCG: Master Cell Group, the main cell group

SCG: Secondary Cell Group, secondary cell group

PCell: Primary Cell, the main cell

SCell: Secondary Cell, secondary cell

PSFCH: Physical Sidelink Feedback Channel, Physical Sidelink Communication Feedback Channel

SPS: Semi-Persistant Scheduling, semi-static scheduling

TA: Timing Advance, uplink timing advance

PT-RS: Phase-Tracking Reference Signals, phase tracking reference signal

TB: Transport Block, transport block

CB: Code Block, coding block/code block

QPSK: Quadrature Phase Shift Keying, quadrature phase shift keying

16/64/256 QAM: 16/64/256 Quadrature Amplitude Modulation, Quadrature 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, frequency domain resource allocation indication (field)

ARFCN: Absolute Radio Frequency Channel Number, absolute radio frequency channel number

The following is a description of the prior art associated with the aspects of the present invention. Unless otherwise specified, the meanings of the same terms in the specific embodiments are the same as those in the prior art.

It is worth pointing out that the V2X and sidelink involved in the description of the present invention have the same meaning. V2X in the text can also represent sidelink; similarly, sidelink in the text can also represent V2X, and no specific distinction or limitation will be made in the following text.

The resource allocation mode of V2X (sidelink) communication in the specification of the present invention and the transmission mode of V2X (sidelink) communication can be equivalently replaced. The resource allocation method referred to in the specification may represent the transmission mode, and the transmission mode referred to may represent the resource allocation method. In NR sidelink communication, transmission mode 1 represents a transmission mode (resource allocation method) based on base station scheduling; transmission mode 2 represents a transmission mode (resource allocation method) based on user equipment sensing and resource selection.

The PSCCH in the specification of the present invention is used to carry the SCI. The PSCCH involved in the description of the present invention corresponds to, or corresponds to, or is related to, or, the scheduled PSSCH indicates the same meaning, and both indicate associated PSSCH or corresponding PSSCH. Similarly, the PSSCH involved in the description corresponds to, or corresponds to, or has the same meaning as the related SCI (including the first-level SCI and the second-level SCI), which means associated SCI or corresponding SCI. It is worth pointing out that the first-level SCI is called 1st stage SCI or SCI format 0-1, and is transmitted in PSCCH; the second-level SCI is called 2nd stage SCI or SCI format 0-2, and is transmitted in the corresponding PSSCH resources .

Scenario of Sidelink Communication

1) Out-of-Coverage sideline communication: neither of the two UEs performing sidelink communication has network coverage (for example, the UE cannot detect any cell cell, indicating that the UE has no network coverage).

2) In-Coverage sideline communication: both UEs performing sidelink communication have network coverage (for example, the UE detects at least one cell that satisfies the "cell selection criterion" on the frequency where sidelink communication needs to be performed, Indicates that the UE has network coverage).

3) Partial-Coverage sidelink communication: 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: no network coverage and network coverage. Part of the network coverage is described in terms of sidelink communication.

Basic process of LTE V2X (sidelink) communication

FIG. 1 is a schematic diagram illustrating sideline communication of an LTE V2X UE. First, UE1 sends sideline communication control information (SCI format 1) to UE2, which is carried by the physical layer channel PSCCH. SCI format 1 contains PSSCH scheduling information, such as PSSCH frequency domain resources. Secondly, UE1 sends sideline communication data to UE2, which is carried by the physical layer channel PSSCH. The PSCCH and the corresponding PSSCH are in a frequency division multiplexing manner, that is, the PSCCH and the corresponding PSSCH are located in the same subframe in the time domain, and are located in different RBs in the frequency domain. The specific design methods of PSCCH and 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 the predefined value 510 . SCI format 1 can be carried in PSCCH, wherein SCI format 1 at least includes frequency domain resource information of PSSCH. 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 PSSCH corresponding to the PSCCH.

2) The PSSCH occupies one subframe in the time domain, and adopts frequency division multiplexing (FDM) with the corresponding PSCCH. PSSCH occupies one or more consecutive sub-channels in the frequency domain, sub-channels represent n _subCHsize consecutive RBs _{in the frequency domain, n subCHsize} is configured by the RRC parameter, the number of starting sub-channels and consecutive sub-channels Indicated by the frequency domain resource indication field of SCIformat 1.

LTE V2X resource allocation method Transmission Mode 3/4

Figure 2 shows two resource allocation methods of LTE V2X, which are respectively called resource allocation based on base station scheduling (Transmission Mode 3) and resource allocation based on UE sensing (Transmission Mode 4). In NR sideline communication, transmission mode 3 of LTE V2X corresponds to transmission mode 1 in NR V2X, which is based on base station scheduling; transmission mode 4 of LTE V2X corresponds to transmission mode 2 in NR V2X, which is based on UE perception. transfer mode. In LTE V2X, when there is eNB network coverage, the base station can configure the resource allocation mode of the UE through UE-level dedicated RRC signaling (dedicated RRC signaling) SL-V2X-ConfigDedicated, or the transmission mode of the UE. ,Specifically:

1) Resource allocation method based on base station scheduling (Transmission Mode 3): The resource allocation method based on base station scheduling indicates that the frequency domain resources used for sidelink communication come from the scheduling of the base station. Transmission mode 3 includes two scheduling methods, namely dynamic scheduling and semi-persistent scheduling (SPS). For dynamic scheduling, the UL grant (DCI format 5A) includes the frequency domain resources of PSSCH, and the CRC of the PDCCH or EPDCCH carrying the DCI format 5A is scrambled by SL-V-RNTI. For SPS semi-persistent scheduling, the base station configures one or more (up to 8) configured scheduling grants (configured grants) through IE: SPS-ConfigSL-r14, each configured scheduling grant contains a scheduling grant number (index) and scheduling grants Licensed resource period. The UL grant (DCI format 5A) includes the frequency domain resources of the PSSCH, and the indication information (3 bits) of the scheduling grant number and the indication information of the SPS activation (activate) or release (release, or deactivation). The CRC of the PDCCH or EPDCCH carrying DCI format 5A is scrambled by SL-SPS-V-RNTI.

Specifically, when the RRC signaling SL-V2X-ConfigDedicated is set to scheduled-r14, it means that the UE is configured as a transmission mode based on base station scheduling. The base station configures SL-V-RNTI or SL-SPS-V-RNTI through RRC signaling, and uses PDCCH or EPDCCH (DCI format 5A, CRC scrambled by SL-V-RNTI or scrambled by SL-SPS-V-RNTI) ) sends an uplink scheduling grant UL grant to the UE. The above-mentioned uplink scheduling grant UL grant at least includes scheduling information of PSSCH frequency domain resources in sidelink communication. When the UE successfully monitors the PDCCH or EPDCCH scrambled by SL-V-RNTI or SL-SPS-V-RNTI, it uses the PSSCH frequency domain resource indication field in the uplink scheduling grant UL grant (DCI format 5A) as the PSCCH Indication information of the frequency domain resources of PSSCH in (SCI format 1), and send PSCCH (SCI format 1) and the corresponding PSSCH.

For semi-persistently scheduled SPS in transmission mode 3, the UE receives SL-SPS-V-RNTI scrambled DCI format 5A on downlink subframe n. If the indication information of SPS activation is included in the DCI format 5A, the UE determines the frequency domain resources of the PSSCH according to the indication information in the DCI format 5A, and determines the time domain resources of the PSSCH (the transmission subframe of the PSSCH) according to information such as subframe n.

2) Resource allocation method based on UE sensing (Transmission Mode 4): The resource allocation method based on UE sensing indicates that the resources used for sidelink communication are based on the UE sensing process of the set of candidate available resources. When the RRC signaling SL-V2X-ConfigDedicated is set to ue-Selected-r14, it indicates that the UE is configured as the transmission mode based on UE sensing. In the UE sensing-based transmission mode, the base station configures the available transmission resource pool, and the UE determines the PSSCH sidelink transmission resources in the transmission resource pool (resource pool) according to certain rules (see the LTE V2X UE sensing process section for a detailed process description). , and send PSCCH (SCI format 1) and corresponding PSSCH.

Sidelink resource pool

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

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

The parameter set numerology includes the subcarrier spacing and the cyclic prefix CP length. Among them, NR supports 5 subcarrier intervals, which are 15k, 30k, 60k, 120k, 240kHz (corresponding to μ=0, 1, 2, 3, 4). Table 4.2-1 shows the set of supported transmission parameters, as follows shown.

Table 4.2-1 Subcarrier spacing supported by NR

μμ	Δf＝2 ^μ·15[kHz] Δf=2 ^μ ·15[kHz]	CP(循环前缀)CP (Cyclic Prefix)
00	1515	正常normal
11	3030	正常normal
22	6060	正常，扩展normal, extended
33	120120	正常normal
44	240240	正常normal

Extended CP is supported only when μ=2, that is, in the case of 60 kHz subcarrier spacing, and only normal CP is supported in other subcarrier spacings. For normal (Normal) CP, each slot (slot) contains 14 OFDM symbols; for extended CP, each slot contains 12 OFDM symbols. For μ=0, i.e. 15kHz subcarrier spacing, 1 slot=1ms; μ=1, i.e. 30kHz subcarrier spacing, 1 slot=0.5ms; μ=2, i.e. 60kHz subcarrier spacing, 1 slot =0.25ms, and so on.

NR and LTE have the same definition of subframe, which means 1ms. For the subcarrier spacing configuration μ, the slot number in a subframe (1ms) can be expressed as

The range is 0 to

The slot number in a system frame (frame, duration 10ms) can be expressed as

The range is 0 to

in,

and

The definitions of the cases at different subcarrier spacing μ are shown in the table below.

Table 4.3.2-1: The number of symbols contained in each slot in 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: The number of symbols contained in each slot when the CP is extended (60kHz), the number of slots contained in each system frame, and the number of slots contained in each subframe

On an NR carrier, the numbered SFN of a system frame (or, simply referred to as a frame) ranges from 0 to 1023. The concept of direct system frame number DFN is introduced in sideline communication, and the numbering range is also from 0 to 1023. The above description of the relationship between system frames and numerology can also be applied to direct system frames. For example, the duration of a direct system frame Also equal to 10ms, for a subcarrier spacing of 15kHz, a direct system frame includes 10 slots, and so on. DFN is used for timing on sidelink carriers.

Parameter sets in LTE (including LTE V2X) and time slots in LTE (including LTE V2X) slot and subframe subframe

LTE only supports subcarrier spacing of 15kHz. Extended CP is supported in LTE, and normal CP is also supported. The subframe subframe has a duration of 1ms and includes two slots, each of which has a duration of 0.5ms.

For 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 in the frequency domain as

consecutive sub-carriers, eg for a sub-carrier spacing of 15 kHz, the RB is 180 kHz in the frequency domain. For a subcarrier spacing of 15 kHz×2 ^μ , the resource element RE represents 1 subcarrier in the frequency domain and 1 OFDM symbol in the time domain.

Absolute Radio Frequency Channel Number (Absolute Radio Frequency Channel Number, ARFCN)

In the LTE sideline communication, the frequency where the sideline communication carrier is located corresponds to the uplink carrier. The relationship between ARFCN and the upstream carrier frequency (carrier frequency, in MHz) is determined by the following formula:

F _UL =F _{UL_low} +0.1×(N _UL -N _Offs-UL ).

Among them, N _UL represents ARFCN; F _{UL_low} and N _Offs-UL are given by the column corresponding to the uplink in the following table. For example, for LTE operating band 1, assuming ARFCN=18200, then the carrier frequency corresponding to ARFCN (18200) F _UL =1920 +0.1×(18200-18000)=1940 (MHz).

Table 5.7.3-1: E-UTRA channel numbers

Hereinafter, specific examples, embodiments, and the like according to the present invention will be described in detail. In addition, as mentioned above, the example, the Example, etc. which are described in this disclosure are illustrative descriptions for easy understanding of this invention, and do not limit this invention.

[Example 1]

FIG. 3 is a schematic diagram illustrating a basic process of a method performed by a user equipment according to Embodiment 1 of the present invention.

Hereinafter, the method executed by the user equipment according to Embodiment 1 of the present invention will be described in detail with reference to the basic process diagram shown in FIG. 3 .

As shown in FIG. 3, in Embodiment 1 of the present invention, the steps performed by the user equipment include:

In step S101, the sideline communication user equipment receives the system information block sent by the base station gNB.

Optionally, the system information block includes configuration information s1-V2X-ConfigCommon-r16 of LTE sideline communication.

Optionally, the system information block is NR system information block 13 (SIB13), and the SIB13 includes configuration information s1-V2X-ConfigCommon-r16 of LTE sideline communication.

Optionally, the configuration information of the LTE sideline communication includes an LTE sideline communication carrier frequency list (list) v2x-InterFreqInfoList-r14; wherein, optionally, each of the LTE sideline communication carrier frequencies included in the list The sideline communication carrier frequency SL-InterFreqInfoV2X-r14 corresponds to (or includes) an ARFCN type configuration information v2x-CommCarrierFreq-r14. Optionally, each sideline communication carrier frequency SL-InterFreqInfoV2X-r14 included in the LTE sideline communication carrier frequency list corresponds to (or includes) configuration information of a carrier bandwidth (carrier bandwidth).

Optionally, the configuration information of the LTE sideline communication includes configuration information of the LTE sideline communication resource pool resource pool.

Optionally, the system information block (on the basis of including the LTE sideline communication carrier frequency list v2x-InterFreqInfoList-r14, in addition) includes a sideline communication carrier frequency configuration information ul-CarrierFreq or v2x-CommCarrierFreq- r14. Optionally, the configuration information ul-CarrierFreq or v2x-CommCarrierFreq-r14 of the one sideline communication carrier frequency is ARFCN type configuration information.

Optionally, the system information block includes configuration information sl-Bandwidth-r16 of a carrier bandwidth.

Optionally, the bandwidth of the carrier corresponding to the configuration information ul-CarrierFreq or v2x-CommCarrierFreq-r14 of the one sideline communication carrier frequency is the sl-Bandwidth-r16.

In step S102, the sideline communication user equipment uses the carrier frequency included in the LTE sideline communication carrier frequency list v2x-InterFreqInfoList-r14 or the one sideline communication carrier frequency ul-CarrierFreq or v2x -CommCarrierFreq-r14 for sidelink communication (V2X sidelink transmission), or,

The sideline communication user equipment uses a carrier frequency that corresponds to (or, associates with) the LTE sideline communication carrier frequency list v2x-InterFreqInfoList-r14 or the one sideline communication carrier frequency ul-CarrierFreq Or the resource pool indicated by the configuration information of the LTE sidelink communication resource pool of the carrier frequency corresponding to v2x-CommCarrierFreq-r14 performs sidelink communication (V2X sidelink transmission).

[Example 2]

FIG. 4 is a schematic diagram illustrating a basic process of a method performed by a user equipment according to Embodiment 2 of the present invention.

Hereinafter, the method executed by the user equipment according to Embodiment 2 of the present invention will be described in detail with reference to the basic process diagram shown in FIG. 4 .

As shown in FIG. 4 , in Embodiment 2 of the present invention, the steps performed by the user equipment include:

In step S201, the sideline communication user equipment receives the system information block sent by the base station gNB.

Optionally, the system information block (on the basis of including the LTE sideline communication carrier frequency list v2x-InterFreqInfoList-r14, in addition) includes a sideline communication carrier frequency configuration information ul-CarrierFreq or v2x-CommCarrierFreq- r14. Optionally, the configuration information ul-CarrierFreq or v2x-CommCarrierFreq-r14 of one sideline communication carrier frequency is ARFCN type configuration information.

In step S202, optionally, the sideline communication user equipment uses a carrier frequency included in the LTE sideline communication carrier frequency list v2x-InterFreqInfoList-r14 or the one sideline communication carrier frequency ul -CarrierFreq or v2x-CommCarrierFreq-r14 for sidelink communication (V2X sidelink transmission), or,

In step S203, optionally, the sideline communication user equipment receives downlink control information DCI.

Optionally, the DCI is NR DCI format 3_1.

Optionally, the DCI includes a sideline communication carrier indication field, and the indication field is 3 bits.

Optionally, the indication field equal to 0 corresponds to the sideline communication carrier corresponding to the one sideline communication carrier frequency ul-CarrierFreq or v2x-CommCarrierFreq-r14; and, optionally, (the indication If the field is greater than 0), the value of the indication field corresponds to the corresponding sideline communication carrier frequency SL-InterFreqInfoV2X-r14.

[Example 3]

FIG. 5 is a schematic diagram illustrating a basic process of a method performed by a user equipment according to Embodiment 3 of the present invention.

Hereinafter, the method executed by the user equipment according to Embodiment 3 of the present invention will be described in detail with reference to the basic process diagram shown in FIG. 5 .

As shown in FIG. 5 , in Embodiment 3 of the present invention, the steps performed by the user equipment include:

In step S301, the sideline communication user equipment receives the system information block sent by the base station gNB.

In step S302, the user equipment ignores (ignores) the configuration information sl-Bandwidth-r16 of the carrier bandwidth in the system information block.

FIG. 6 is a block diagram showing a user equipment UE according to the present invention. As shown in FIG. 6 , the user equipment UE80 includes a processor 801 and a memory 802 . The processor 801 may include, for example, a microprocessor, a microcontroller, an embedded processor, or the like. The memory 802 may include, for example, volatile memory (eg, random access memory RAM), a hard disk drive (HDD), non-volatile memory (eg, flash memory), or other memory, or the like. Program instructions are stored on the memory 802 . When the instructions are executed by the processor 801, the above method described in detail in the present invention and executed by the user equipment can be executed.

The method and related apparatus of the present invention have been described above with reference to the preferred embodiments. Those skilled in the art can understand that the methods shown above are only exemplary, and the various embodiments described above can be combined with each other under the condition that no contradiction occurs. The method of the present invention is not limited to the steps and sequences shown above. The network node and user equipment shown above may include more modules, for example, may also include modules that can be developed or developed in the future and can be used for base stations, MMEs, or UEs, and so on. The various identifiers shown above are only exemplary and not restrictive, and the present invention is not limited to the specific information elements exemplified by these identifiers. Numerous changes 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 may be implemented by software, hardware, or a combination of both. For example, the various components inside the base station and the user equipment in the above embodiments may be implemented by various devices, including but not limited to: analog circuit devices, digital circuit devices, digital signal processing (DSP) circuits, programmable processing Controllers, Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), Programmable Logic Devices (CPLDs), etc.

In this application, "base station" may refer to a mobile communication data and control switching center with larger transmission power and wider coverage area, including functions such as resource allocation and scheduling, data reception and transmission, and the like. "User equipment" may refer to a user mobile terminal, for example, including a mobile phone, a notebook, and other terminal equipment that can 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 a product having a computer-readable medium on which computer program logic is encoded that, when executed on a computing device, provides relevant operations to achieve The above technical solutions 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 the embodiments of the present invention. Such arrangements of the present invention are typically provided as software, code and/or other data structures arranged or encoded on a computer readable medium such as an optical medium (eg CD-ROM), floppy or hard disk, or such as one or more Firmware or other medium of microcode on a ROM or RAM or PROM chip, or a downloadable software image in one or more modules, a shared database, etc. Software or firmware or such a configuration may be installed on a computing device, so that one or more processors in the computing device execute the technical solutions described in the embodiments of the present invention.

In addition, each functional module or each 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 usually one or more integrated circuits. Circuits designed to perform the various functions described in this specification may include general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs) or general purpose integrated circuits, field programmable gate arrays (FPGAs) or other Program logic devices, discrete gate or transistor logic, or discrete hardware components, or any combination of the above. 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 digital circuits, or may be configured by logic circuits. In addition, when an advanced technology that can replace the current integrated circuit appears due to the advancement 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 conjunction with the preferred embodiments thereof, those skilled in the art will appreciate that various modifications, substitutions and alterations can be made herein without departing from the spirit and scope of the invention. Therefore, the present invention should not be limited by the above-described embodiments, but should be defined by the appended claims and their equivalents.

Claims

A method performed by a user equipment, comprising the steps of:

The user equipment receives a system information block sent by the base station, where the system information block includes configuration information ul-CarrierFreq or v2x-CommCarrierFreq-r14 of a carrier frequency of sideline communication;

The user equipment performs sidelink communication using the carrier frequency corresponding to the configuration information ul-CarrierFreq or v2x-CommCarrierFreq-r14 of the carrier frequency of one sidelink communication;

The user equipment receives downlink control information DCI.
The method performed by user equipment according to claim 1, wherein,

The system information block is NR system information block 13, namely SIB13, and the SIB13 includes configuration information s1-V2X-ConfigCommon-r16 of LTE sideline communication.
The method performed by user equipment according to claim 2, wherein,

The configuration information of the LTE sideline communication includes the LTE sideline communication carrier frequency list v2x-InterFreqInfoList-r14;

Each sideline communication carrier frequency SL-InterFreqInfoV2X-r14 included in the LTE sideline communication carrier frequency list corresponds to an ARFCN type configuration information v2x-CommCarrierFreq-r14, and corresponds to a carrier bandwidth configuration information.
The method performed by user equipment according to claim 3, wherein,

The configuration information of the LTE sideline communication includes configuration information of the LTE sideline communication resource pool.
The method performed by user equipment according to claim 2, wherein,

The system information block includes configuration information sl-Bandwidth-r16 of a carrier bandwidth.
The method performed by user equipment according to claim 5, wherein,

The bandwidth of the carrier corresponding to the configuration information ul-CarrierFreq or v2x-CommCarrierFreq-r14 of one sideline communication carrier frequency is the sl-Bandwidth-r16.
The method performed by user equipment according to claim 4, wherein,

The user equipment uses the carrier frequency corresponding to the carrier frequency included in the LTE sideline communication carrier frequency list v2x-InterFreqInfoList-r14 or the configuration information ul-CarrierFreq or v2x-CommCarrierFreq-r14 corresponding to the one sideline communication carrier frequency. The resource pool indicated by the configuration information of the LTE sidelink communication resource pool of the carrier frequency performs sidelink communication.
The method performed by user equipment according to claim 3, wherein,

The DCI includes a sideline communication carrier indication field, and the indication field is 3 bits,

The indication field is equal to 0 and corresponds to the sideline communication carrier corresponding to the configuration information ul-CarrierFreq or v2x-CommCarrierFreq-r14 of the one sideline communication carrier frequency,

When the indication field is greater than 0, the value of the indication field corresponds to the corresponding sideline communication carrier frequency SL-InterFreqInfoV2X-r14.
The method performed by user equipment according to claim 1, wherein,

The configuration information ul-CarrierFreq or v2x-CommCarrierFreq-r14 of one sideline communication carrier frequency is an ARFCN type of configuration information.
A user equipment comprising:

processor; and

memory, storing instructions,

The instructions, when executed by the processor, cause the user equipment to perform the method of any of claims 1-9.