CN113923629A

CN113923629A - Method performed by user equipment and user equipment

Info

Publication number: CN113923629A
Application number: CN202010654562.3A
Authority: CN
Inventors: 赵毅男; 刘仁茂; 罗超
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 2020-07-08
Filing date: 2020-07-08
Publication date: 2022-01-11
Also published as: WO2022007664A1

Abstract

The invention provides a method executed by user equipment and the user equipment, wherein the method comprises the following steps: the user equipment receives a system information block transmitted by a base station, wherein the system information block comprises configuration information ul-Carrier Freq or v2 x-CommCrierFreq-r 14 of one collateral communication carrier frequency; the user equipment carries out collateral communication by using the carrier frequency corresponding to the configuration information ul-Carrier Freq or v2 x-CommCrierFreq-r 14 of the one collateral communication carrier frequency; and the user equipment receives downlink control information DCI.

Description

Method performed by user equipment and user equipment

Technical Field

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

Background

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

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

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

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

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

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

2) priority handling mechanism for D2D communications.

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

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

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

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

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

The 3GPP has divided the research and standardization work of V2X into 3 stages. The first phase was completed in 2016 and 9 months, mainly focusing on V2V, and was formulated based on LTE Release12 and Release 13D 2D (also called sidelink communication), i.e., proximity communication technology (see non-patent document 3). V2X stage 1 introduced a new D2D communication interface, called PC5 interface. The PC5 interface is mainly used to solve cellular internet of vehicles communication problems in high speed (up to 250 km/h) and high node density environments. The vehicles can interact with information such as position, speed and direction through the PC5 interface, i.e., the vehicles can communicate directly with each other through the PC5 interface. Compared with the proximity communication between D2D devices, the functions introduced by LTE Release 14V 2X mainly include:

1) higher density DMRS to support high speed scenarios;

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

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

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

At the 3GPP RAN #80 congress of 6 months in 2018, the corresponding third stage was approved based on the V2X feasibility study topic of 5G NR network technology (see non-patent document 5). In the research project of standardization of 5GV2X, NR base station gNB scheduling side communication user equipment is supported to perform side communication in LTE side row communication transmission mode 3(mode3, including only semi-persistent scheduling SPS).

In conference of 3GPP RAN1#97 in month 5 in 2019 (see non-patent document 6), the following conference conclusion is reached with respect to scheduling LTE sidelink communication transmission mode3 by NR base station gNB:

■ do not support activation/deactivation of SPS semi-persistent scheduling in LTE sidestream communications based on RRC signaling indications.

■ support activation/deactivation of SPS semi-persistent scheduling in LTE sidelink communications based on DCI indications.

● NR base station gNB activation/deactivation of SPS semi-persistent scheduling in LTE sidestream communication by DCI is based on UE capability;

● providing indication fields related to the LTE DCI format5A and the SPS of the LTE side-line communication in the DCI;

● the DCI has the same number of bits (size) as that of DCI for scheduling NR side row communication by gNB defined in the NR side row communication;

● activation/deactivation applies to the first LTE subframe of (Z + X) ms after receiving the DCI described above.

O Z represents a time length offset in LTE sidelink communication.

The scheme of the patent mainly includes a method for determining a carrier (frequency) of the sidestream communication by the NR base station gNB when the LTE sidestream communication user equipment is scheduled to perform the sidestream communication in the LTE sidestream communication transmission mode 3.

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#97, Charrman notes, section 7.2.4.7

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.

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

the user equipment receives a system information block transmitted by a base station, wherein the system information block comprises configuration information ul-Carrier Freq or v2 x-CommCrierFreq-r 14 of one collateral communication carrier frequency;

the user equipment carries out collateral communication by using the carrier frequency corresponding to the configuration information ul-Carrier Freq or v2 x-CommCrierFreq-r 14 of the one collateral communication carrier frequency;

and 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 sl-V2X-ConfigCommon-r16 for LTE-side row communication.

In the method performed by the user equipment, preferably, the configuration information of the LTE sidestream communication includes a list v2x-inter freqlnfolist-r 14 of LTE sidestream communication carrier frequencies;

each sidestream communication carrier frequency SL-InterFreqInfo V2X-r14 contained in the LTE sidestream communication carrier frequency list corresponds to configuration information V2x-CommCarrier Freq-r14 of an ARFCN type and configuration information of a carrier bandwidth.

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

In the 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 v2 x-comcrrierfeq-r 14 of the one sidestream communication carrier frequency is the sl-Bandwidth-r 16.

In the method performed by the user equipment, preferably, the user equipment performs sidestream communication using a resource pool indicated by configuration information of the LTE sidestream communication resource pool corresponding to a carrier frequency included in the LTE sidestream communication carrier frequency list v2x-inter freqinfolist-r14 or a carrier frequency corresponding to the one sidestream communication carrier frequency, ul-CarrierFreq or v2 x-comcarrierfreq-r 14.

In the method performed by the user equipment, preferably, the DCI includes a sidelink communication carrier indicator field, where the indicator field is 3bits,

the indication field is equal to 0 or the sidestream communication carrier corresponding to the configuration information ul-CarrierFreq or v2x-CommCarrierFreq-r14 corresponding to the one sidestream communication carrier frequency,

and under the condition that the indication field is larger than 0, the value of the indication field corresponds to the corresponding sidestream communication carrier frequency SL-InterFreqInfo V2X-r 14.

In the above-described method performed by the user equipment, preferably, the configuration information ul-CarrierFreq or v2 x-comcarrierfreq-r 14 of the one sidestream communication carrier frequency is configuration information of an ARFCN type.

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

a processor; and

a memory having stored therein instructions that, when executed,

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

The invention has the advantages of

The scheme of the invention comprises a method for determining a carrier (frequency) of the sidestream communication by the NR base station when the NR base station schedules the LTE sidestream communication user equipment not to carry out the sidestream communication of the LTE sidestream communication transmission mode 3. According to the method, the NR base station can schedule the user equipment to carry out LTE sidelink communication. Meanwhile, the NR base station can schedule the LTE side communication user equipment to perform side communication on the carrier frequency covered by the LTE cell, so that the frequency spectrum sharing of the LTE up-down communication and the LTE side communication is realized, the frequency spectrum utilization efficiency is improved, and the communication quality is improved.

Drawings

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

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

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

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

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

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

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

Detailed Description

The invention is described in detail below with reference to the figures and the detailed description. It should be noted that the present invention should not be limited to the specific embodiments described below. In addition, for the sake of brevity, detailed descriptions of well-known technologies not directly related to the present invention are omitted 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: infbrmation 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

PT-RS: Phase-Tracking Reference Signals

TB: transport Block

CB: code Block, Code Block/Code Block

QPSK: quadrature Phase Shift Keying (QPSK)

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

AGC: auto Gain Control, automatic Gain Control

Tdra (field): time Domain Resource Assignment, Time Domain Resource allocation indication (Domain)

Fdra (field): frequency Domain Resource Assignment, Frequency Domain Resource allocation indication (Domain)

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

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. In NR side-row communication, transmission mode 1 indicates a transmission mode (resource allocation scheme) based on base station scheduling; transmission mode 2 denotes a transmission mode (resource allocation manner) based on user equipment awareness (sensing) and resource selection.

The PSCCH in the description of the present invention is used to carry SCI. The PSCCH referred to in the description of the present invention is referred to as corresponding PSCCH, or related PSCCH, or scheduled PSCCH, which all have the same meaning and all represent either an associated PSCCH or a associated PSCCH. Similarly, PSSCH references in the specification refer to corresponding, or related SCIs (including first-level SCI and second-level SCI) as having the same meaning, and all refer to associated SCI or associated SCI. It is noted that the first-level SCI, referred to as the 1st stage SCI or SCI format 0-1, is transmitted in the PSCCH; the second level SCI is called 2nd stage SCI or SCI format 0-2, and is transmitted in the resource of the corresponding PSSCH.

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 format1), carried by the physical layer channel PSCCH, to the UE 2. SCI format1 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 format1, where SCI format1 at least includes frequency domain resource information of the PSCCH. For example, for the frequency domain resource indication field, SCI format1 indicates the starting sub-channel number and the number of consecutive sub-channels of the pschs corresponding to the PSCCH.

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

LTE V2X resource allocation Mode Transmission 3/4

Fig. 2 shows two resource allocation manners of LTE V2X, which are respectively referred to as resource allocation based on base station scheduling (Transmission Mode 3) and resource allocation based on UE sensing (sensing) (Transmission Mode 4). In NR side-row communication, transmission mode3 of LTE V2X corresponds to transmission mode 1 in NR V2X, which is a transmission mode based on base station scheduling; transmission mode 4 of LTE V2X corresponds to transmission mode 2 in NR V2X, which is a UE-aware based transmission mode. In LTE V2X, when there is eNB network coverage, a base station may configure a resource allocation manner of a UE, or referred to as a transmission mode of the UE, through UE-level proprietary RRC signaling (dedicated RRC signaling) SL-V2X-ConfigDedicated, specifically:

1) resource allocation scheme 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 mode3 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 format5A is scrambled by the SL-V-RNTI. For SPS semi-persistent scheduling, the base station passes IE: the SPS-ConfigSL-r14 configures one or more (up to 8) configured scheduling grants (configured grant), each configured scheduling grant containing a scheduling grant number (index) and a resource period of the scheduling grant. The UL grant (DCI format 5A) includes frequency domain resources of the psch, and indication information (3bits) of a scheduling grant number and indication information of SPS activation (activation) or release (release or deactivation). The CRC of the PDCCH or EPDCCH carrying the DCI format5A is scrambled by SL-SPS-V-RNTI.

Specifically, when the RRC signaling SL-V2X-ConfigDedicated is set to scheduled-r14, it indicates that the UE is configured to a transmission mode based on base station scheduling. The base station configures SL-V-RNTI or SL-SPS-V-RNTI through RRC signaling, and sends uplink scheduling permission UL grant to the UE through PDCCH or EPDCCH (DCI format5A, CRC adopts SL-V-RNTI scrambling or adopts SL-SPS-V-RNTI scrambling). The uplink scheduling grant UL grant at least includes scheduling information of psch frequency domain resources in sidelink communication. And when the UE successfully monitors PDCCH or EPDCCH scrambled by SL-V-RNTI or SL-SPS-V-RNTI, taking a PSSCH frequency domain resource indication domain in an uplink scheduling grant UL grant (DCI format 5A) as indication information of a PSSCH frequency domain resource in the PSCCH (SCI format1), and sending the PSCCH (SCI format1) and the corresponding PSSCH.

For semi-persistent scheduling SPS in transmission mode3, the UE receives DCI format5A scrambled by SL-SPS-V-RNTI on downlink subframe n. If the DCI format5A includes indication information for SPS activation, the UE determines frequency domain resources of the PSSCH according to the indication information in the DCI format5A, and determines time domain resources of the PSSCH (transmission subframe of the PSSCH) according to information such as subframe n.

2) Resource allocation method based on UE sensing (sensing) (Transmission Mode 4): the UE sensing-based resource allocation mode represents a sensing (sensing) process of a UE-based candidate available resource set for sidelink communication. The RRC signaling SL-V2X-ConfigDedicated when set to UE-Selected-r14 indicates that the UE is configured to transmit mode based on UE sending. In the UE sensing-based transmission mode, the base station configures an available transmission resource pool, and the UE determines a sidelink transmission resource of the PSCCH in the transmission resource pool (resource pool) according to a certain rule (for a detailed description of the procedure, see LTE V2X UE sensing procedure part), and transmits the PSCCH (SCI format1) and the corresponding PSCCH.

Side communication resource pool (sidelink resource pool)

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

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 4.2-1NR 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,

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, again with a number ranging from 0 to 1023, and the above statements on the relation between system frames and numerology are equally applicable to direct system frames, e.g. a direct system frame having a duration equal to 10ms, a direct system frame comprising 10 slot slots for a subcarrier spacing of 15kHz, etc. DFN is applied for timing on sidelink carriers.

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

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

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

Resource blocks RB and resource elements RE

The resource block RB is defined as in the frequency domain

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

Absolute Radio Frequency Channel Number (ARFCN)

In LTE sidelink communications, the frequency at which the sidelink communications carrier is located corresponds to an uplink carrier. For the relationship between ARFCN and the uplink carrier frequency (carrier frequency, in MHz), it is determined by the following formula:

F_UL＝F_{UL_low}+0.1×(N_UL-N_offs-UL).

wherein N is_ULRepresents ARFCN; f_{UL_low}And N_offs-ULGiven by the corresponding ascending columns in the following table, for example, for LTE operating band 1, assuming ARFCN 18200, then carrier frequency F corresponding to ARFCN (18200)_UL＝1920+0.1×(18200-18000)＝1940(MHz)。

Table5.7.3-1：E-UTRA channel numbers

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 sidestream communication user equipment receives the system information block transmitted by the base station gNB.

Optionally, the system information block includes configuration information sl-V2X-ConfigCommon-r16 for LTE sidelink communication.

Optionally, the system information block is an NR system information block 13(SIB13), and the SIB13 includes configuration information sl-V2X-ConfigCommon-r16 for LTE sidelink communication.

Optionally, the configuration information of the LTE sidestream communication includes an LTE sidestream communication carrier frequency list (list) v2x-inter freqlnfolist-r 14; optionally, each sidestream communication carrier frequency SL-inter freqlnfo v2X-r14 included in the LTE sidestream communication carrier frequency list corresponds to (or includes) configuration information v2x-comm carrier freq-r14 of an ARFCN type. Optionally, each sidelink communication carrier frequency SL-inter freqlnfo v2X-r14 included in the LTE sidelink communication carrier frequency list corresponds to (or includes) configuration information of a carrier bandwidth (carrier bandwidth).

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

Optionally, the system information block (in addition to containing the LTE sidestream communication carrier frequency list v2x-inter freqinfolist-r 14) contains configuration information ul-carrier freq or v2x-comm carrier freq-r14 of one sidestream communication carrier frequency. Optionally, the configuration information ul-CarrierFreq or v2 x-comcarrierfreq-r 14 of the one sidestream communication carrier frequency is ARFCN type configuration information.

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

Optionally, the Bandwidth of the carrier corresponding to the configuration information ul-carrier freq or v2 x-comcarrier freq-r14 of the one sidestream communication carrier frequency is sl-Bandwidth-r 16.

In step S102, the sidelink communication user equipment performs sidelink communication (V2X sidelink transmission) using a carrier frequency contained in (included in) the LTE sidelink communication carrier frequency list V2x-inter freqinfolist-r14 or the one sidelink communication carrier frequency ul-CarrierFreq or V2 x-comcarrierfreq-r 14, or,

the sidelink communication user equipment uses a resource pool indicated by configuration information of the LTE sidelink communication resource pool corresponding to a carrier frequency (correct to or assign with) contained in the LTE sidelink communication carrier frequency list V2x-InterFreqInfoList-r14 or a carrier frequency ul-Carrier Freq or V2 x-CommCrierFreq-r 14 to perform sidelink communication (V2X sidelink transmission).

[ example two ]

Fig. 4 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. 4.

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

in step S201, the sidestream communication user equipment receives the system information block transmitted by the base station gNB.

In step S202, optionally, the sidelink communication user equipment uses the carrier frequency contained in (included in) the LTE sidelink communication carrier frequency list V2x-inter freqinfolist-r14 or the one sidelink communication carrier frequency ul-CarrierFreq or V2x-comm carrier freq-r14 for sidelink communication (V2X sidelink transmission), or,

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

Optionally, the DCI is NR DCI format 3_ 1.

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

Optionally, the indication field is equal to 0 for (corresponds to) the sidestream communication carrier to which the one sidestream communication carrier frequency ul-CarrierFreq or v2 x-comcarrierfreq-r 14 corresponds; and, optionally, (in case the indication field is greater than 0), the value of the indication field corresponds to the corresponding sidelink communication carrier frequency SL-inter freqlnfo v2X-r 14.

[ third example ]

Fig. 5 is a diagram showing 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. 5.

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

in step S301, the sidestream communication user equipment receives the system information block transmitted by the base station gNB.

In step S302, the ue ignores (ignores) 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, 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 electrically use the integrated circuit obtained by the advanced technology.

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

Claims

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

and the user equipment receives downlink control information DCI.

2. The method performed by a user equipment of claim 1,

the system information block is an NR system information block 13, namely, SIB13, and the SIB13 contains configuration information sl-V2X-ConfigCommon-r16 for LTE-side row communication.

3. The method performed by the user equipment of claim 2,

the configuration information of the LTE sidestream communication comprises an LTE sidestream communication carrier frequency list v2x-InterFreqInfoList-r 14;

each sidestream communication carrier frequency SL-lnfov 2X-r14 contained in the LTE sidestream communication carrier frequency list corresponds to configuration information v2 x-comcarrierfreq-r 14 of an ARFCN type and configuration information of a carrier bandwidth.

4. The method performed by a user equipment of claim 3,

the configuration information of the LTE sidestream communication comprises configuration information of an LTE sidestream communication resource pool.

5. The method performed by the user equipment of claim 2,

the system information block contains configuration information sl-Bandwidth-r16 for one carrier Bandwidth.

6. The method performed by the user equipment of claim 5,

the Bandwidth of the carrier corresponding to the configuration information ul-Carrier Freq or v2 x-CommCrierFreq-r 14 of the one sidestream communication carrier frequency is sl-Bandwidth-r 16.

7. The method performed by the user equipment of claim 4,

the user equipment performs sidestream communication using a resource pool indicated by configuration information of the LTE sidestream communication resource pool corresponding to a carrier frequency included in the LTE sidestream communication carrier frequency list v2x-inter freqlnfolist-r 14 or a carrier frequency corresponding to the one sidestream communication carrier frequency, ul-CarrierFreq or v2 x-comcanerrirfreq-r 14.

8. The method performed by a user equipment of claim 3,

the DCI comprises a sidelink communication carrier indication field, wherein the indication field is 3bits,

9. The method performed by a user equipment of claim 1,

the configuration information ul-CarrierFreq, or v2x-CommCarrierFreq-r14 of the one sidestream communication carrier frequency is one type of configuration information of ARFCN.

10. A user equipment, comprising:

a processor; and

a memory having stored therein instructions that, when executed,

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