WO2022206817A1 - 由用户设备执行的方法以及用户设备 - Google Patents
由用户设备执行的方法以及用户设备 Download PDFInfo
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Definitions
- 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.
- 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.
- 3GPP 3rd Generation Partnership Project
- the upper layer supports unicast (Unicast) and multicast (Groupcast) communication functions.
- LTE Release 13 eD2D The main features introduced by LTE Release 13 eD2D include:
- 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:
- V2V Vehicle to Vehicle, that is, vehicle-to-vehicle communication
- V2P Vehicle to Pedestrian, that is, the vehicle sends a warning to pedestrians or non-motor vehicles
- V2N Vehicle to Network, that is, the vehicle is connected to the mobile network
- V2I Vehicle to Infrastructure, that is, communication between vehicles and road infrastructure.
- 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.
- the functions introduced by LTE Release 14 V2X mainly include:
- 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.
- resource allocation mode 2 (resource allocation mode 2) based on user equipment sensing (sensing) is supported, or transmission mode 2.
- resource allocation mode 2 the physical layer of the user equipment senses the transmission resources in the resource pool, and reports the set of available transmission resources to the upper layer. After obtaining the report of the physical layer, the upper layer selects the resources specifically used for the transmission of sideline communication.
- Non-Patent Document 6 a standardization research topic (see Non-Patent Document 6) based on the already standardized NR sidelink enhancement was approved.
- the enhancement of sideline communication includes the following two aspects:
- Standardize the resource allocation method for reducing the power consumption of sideline communication user equipment including but not limited to: resource allocation method based on partial sensing, resource allocation method based on random resource selection;
- the solution of the present patent includes, in the sideline communication enhancement, a method for the sideline communication user equipment to determine a candidate resource set in a resource allocation method based on partial sensing, and a method for the user equipment to determine the moment when the upper layer triggers the physical layer to perform partial sensing a method.
- NR sideline communication enhancement also includes the standardization research work for sideline communication discontinuous reception (SL Discontinuous Reception, SL DRX for short).
- SL DRX sideline communication discontinuous reception
- user equipment supports receiving the physical downlink control channel PDCCH discontinuously in time, called DRX, which can effectively reduce the power consumption of communication equipment.
- DRX physical downlink control channel
- discontinuous reception refers to receiving the physical sideline communication control channel PSCCH for a part of the time in the time domain, which is called Active time; the time when PSCCH is not received is called In-active time.
- the solution of this patent also includes a method for the sideline communication user equipment to determine the duration of the round-trip timer RTT timer.
- 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 RP-202846, WID revision: NR sidelink enhancement
- the purpose of the present invention is to provide a method performed by the user equipment and the user equipment that can ensure that the PSSCH transmitted by the sideline communication user equipment can be received by the opposite end user equipment during the active period, and enhance the reliability of the sideline communication.
- Another object of the present invention is to provide a resource allocation method based on partial sensing, the solution of this patent can ensure that after partial sensing is triggered, the user equipment can continuously monitor the PSCCH to avoid resource conflict, thereby improving the transmission of sideline communication Reliable methods performed by user equipment and user equipment.
- Another object of the present invention is to provide a method for user equipment to determine a round-trip timer in this patent, which ensures the consistency of the round-trip timer between the sending user equipment and the receiving user equipment, and can effectively reduce the power consumption of the sideline communication user equipment The method performed by the user equipment and the user equipment.
- the present invention provides a method performed by a user equipment and a user equipment.
- a request for determining transmission resources of PSSCH/PSCCH is received from a higher layer, the user equipment determines an active period of discontinuous reception of sideline communication, and the user equipment determines a set of listening time slots.
- a request to determine transmission resources of PSSCH/PSCCH is received from a higher layer on time slot n.
- the set of listening time slots at least includes time slots in all or part of the resource pool both within the time interval and within the active period, wherein the The time interval is [n, n + TB] or, [n + 1, n + TB], where TB is the 31st time slot in the resource pool starting from the time slot n, or , from which forward or subtract or time slots, or the TB is the 32nd time slot in the resource pool starting from the time slot n, or, on this basis, forward or subtract or time slot).
- the time interval is within the active period, wherein the time interval is [n, n+T B ] or, [n+1, n+T B ], the T B is the 31st time slot in the resource pool starting from the time slot n, or, on this basis, forward or subtract or time slots, or the TB is the 32nd time slot in the resource pool starting from the time slot n, or, on this basis, forward or subtract or time slot).
- the method includes: the first user equipment receives the time interval indication information sent by the second user equipment, and the first user equipment determines the duration of the round-trip timer for discontinuous reception of sideline communication.
- the time interval indicated by the time interval indication information represents the time required for PSFCH reception processing and retransmission preparation determined by the second user equipment.
- the first user equipment determines the duration of the round trip timer for the discontinuous reception of the sideline communication according to at least the time interval indication information.
- the user equipment obtains the configuration information of the sideline communication resource pool, and the receiving user equipment determines the duration of the round-trip timer for the discontinuous reception of the sideline communication.
- the configuration information of the sidelink communication resource pool at least includes the minimum time domain interval s1-MinTimeGapPSFCH between the PSSCH and the PSFCH, and the period of the PSFCH s1-PSFCH- Period.
- a user equipment includes: a processor; and a memory storing instructions; wherein the instructions, when executed by the processor, perform the method of the above-mentioned first aspect.
- the solution of this patent in the resource allocation method based on partial perception, it can be ensured that the PSSCH transmitted by the user equipment of the sideline communication can be received by the user equipment of the opposite end during the active period, which enhances the reliability of the sideline communication; , in the resource allocation method based on partial sensing, the solution of this patent can ensure that after partial sensing is triggered, the user equipment can continuously monitor the PSCCH to avoid resource conflict, and improve the transmission reliability of sideline communication; the user equipment in this patent determines The method of the round-trip timer RTT timer ensures the consistency of the round-trip timer RTT timer between the sending user equipment and the receiving user equipment, and can effectively reduce the power consumption of the sideline communication user equipment.
- 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 and third embodiments of the invention.
- FIG. 5 is a schematic diagram illustrating a basic process of a method performed by a user equipment in Embodiment 4 of the invention.
- FIG. 6 is a schematic diagram illustrating a basic process of a method executed by a user equipment in Embodiment 5 of the invention.
- FIG. 7 is a schematic diagram showing the basic process of the method performed by the user equipment in the sixth and seventh embodiments of the invention.
- FIG. 8 is a block diagram illustrating a user equipment according to an embodiment of the present invention.
- 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.
- 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.
- LTE Long Term Evolution, long term evolution technology
- 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
- 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
- SCI Sidelink Control Information, side communication control information
- PSCCH Physical Sidelink Control Channel
- MCS Modulation and Coding Scheme, modulation and coding scheme
- RB Resource Block, resource block
- CRB Common Resource Block, common resource block
- CP Cyclic Prefix, cyclic prefix
- PRB Physical Resource Block, physical resource block
- PSSCH Physical Sidelink Shared Channel
- FDM Frequency Division Multiplexing, Frequency Division Multiplexing
- RRC 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
- TDD Time Division Duplexing
- FDD Frequency Division Duplexing, frequency division duplexing
- SIBl 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 Number, system (wireless) frame number
- DFN Direct Frame Number, direct frame number
- 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
- PT-RS Phase-Tracking Reference Signals, phase tracking reference signal
- 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
- ARFCN Absolute Radio Frequency Channel Number, absolute radio frequency channel number
- SC-FDMA Single Carrier-Frequency Division Multiple Access, single carrier-frequency division multiplexing multiple access
- MAC Medium Access Control, media access control layer
- RTT Round Trip Time, round trip time
- 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.
- 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.
- 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.
- the first-level SCI is called 1st stage SCI or SCI format 1-A and is transmitted in PSCCH;
- the second-level SCI is called 2nd stage SCI or SCI format 2-A (or, SCI format 2-B) , transmitted in the corresponding PSSCH resources.
- the peer user equipment refers to the user equipment on the receiving side in the unicast communication (unicast) of the sideline communication, that is, the receiving user equipment.
- Unicast communication means that a connection is established between a sending user equipment and a receiving user equipment, which is called a PC5 RRC connection.
- the sending user equipment can send the PC5 RRC configuration message to the receiving user equipment (the opposite end user equipment); the receiving user equipment can also send the PC5 RRC configuration message to the sending user equipment, and the present invention does not do this. limit.
- the receiving user equipment sends a configuration message, or PSSCH, or PSFCH to the sending user equipment
- the sending user equipment at this time may also be referred to as a peer user equipment.
- the set of listening time slots determined by the user equipment may not include the time slot where the user equipment transmits (PSSCH/PSCCH), which is not limited in the present invention.
- 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).
- Partial-Coverage sidelink communication one of the UEs performing sidelink communication has no network coverage, and the other UE has network coverage.
- the UE 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.
- FIG. 1 is a schematic diagram illustrating sideline communication of an LTE V2X UE.
- 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.
- 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.
- a transport block TB may contain only one initial transmission, or one initial transmission and one blind retransmission (blind retransmission, which means retransmission not based on HARQ feedback).
- 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.
- 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 SCI format 1.
- FIG. 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).
- 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.
- 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:
- 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).
- SPS semi-persistent 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.
- 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.
- the RRC signaling SL-V2X-ConfigDedicated when the RRC signaling SL-V2X-ConfigDedicated is set to scheduled-r14, it indicates that the UE is configured as a transmission mode based on the 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, the CRC is scrambled with SL-V-RNTI or scrambled with 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.
- the UE 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.
- DCI format 5A the PSSCH frequency domain resource indication field in the uplink scheduling grant UL grant
- 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.
- 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.
- 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.
- 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.
- the resources sent and received by the UE belong to the resource pool resource pool.
- 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.
- the sidelink communication user equipment selects candidate resources within a time window, and determines and the reserved resources according to the reserved resources indicated by PSCCH sent by other user equipments in the monitoring time slot. There are overlapping candidate resources, and these overlapping candidate resources are excluded.
- the physical layer reports the set of candidate resources that are not excluded to the MAC layer, and the MAC layer selects transmission resources for PSSCH/PSCCH.
- PSFCH is used to carry HARQ feedback (HARQ-ACK) for sideline communication.
- HARQ-ACK HARQ feedback
- the transmitting user equipment sends PSSCH and PSCCH, and if the receiving user equipment correctly receives and decodes the PSCCH and PSSCH, it will feed back ACK on the PSFCH; otherwise, it will feed back NACK.
- the parameter set numerology includes the subcarrier spacing and the cyclic prefix CP length.
- Table 4.2-1 shows the set of supported transmission parameters, as follows shown.
- ⁇ ⁇ f 2 ⁇ ⁇ 15[kHz] CP (Cyclic Prefix) 0 15 normal 1 30 normal 2 60 normal, extended 3 120 normal 4 240 normal
- each slot (slot) contains 14 OFDM symbols; for extended CP, each slot contains 12 OFDM symbols.
- NR and LTE have the same definition of subframe, which means 1ms.
- subframe For the subcarrier spacing configuration ⁇ , 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 ⁇ 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
- the numbered SFN of a system 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.
- 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.
- 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.
- 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 Resource block RB, resource element RE and sub-channel sub-channel
- 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.
- the resource element RE represents 1 subcarrier in the frequency domain and 1 OFDM symbol in the time domain.
- PSSCH resource allocation is based on a sub-channel sub-channel as a basic unit, that is, PSSCH transmission occupies one or more consecutive sub-channels in the frequency domain.
- one subchannel represents multiple consecutive RBs in the frequency domain.
- the number of RBs included in one subchannel is configured through the RRC configuration information of the resource pool.
- the sideline communication user equipment monitors (monitors) the PSCCH during the active time of the active period; during the in-active time of the inactive period, the user equipment does not need to monitor the PSCCH.
- the user equipment determines whether the current moment is an active period or an inactive period through some timers (running or timeout). For the round-trip timer RTT timer, it means that when the timer is running (running), the user equipment considers that the peer user equipment will not send PSCCH to schedule retransmissions, or other sideline communication transmissions, so before the RTT timer times out, the The user equipment is in an inactive period and will not monitor the PSCCH.
- the RTT timer generally indicates the minimum duration that the user equipment assumes that the peer user equipment will not schedule retransmissions.
- the timer expires means that the running time of the timer exceeds the duration of the timer, that is, the timer expires.
- the upper layer requests or triggers the physical layer to determine resources for PSSCH/PSCCH transmission on time slot n.
- the resource selection window is defined as [n+T1, n+T2], that is, the user equipment selects transmission resources in this window.
- T1 satisfies the condition The selection of T1 depends on the implementation of the user equipment; the RRC configuration information includes a resource selection window configuration list s1-SelectionWindowList, where the elements in the list corresponding to a given priority prio TX (priority for transmitting PSSCH) represent is T 2min .
- T2 satisfies the condition T 2min ⁇ T2 ⁇ remaining PDB, and the selection of T2 depends on the implementation of the user equipment; otherwise, T2 is set to remaining pdb.
- ⁇ SL represents the subcarrier spacing parameter of sideline communication, that is, the subcarrier spacing is ):
- 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.
- the steps performed by the user equipment include:
- step S101 a request (request, or trigger) for determining transmission resources of PSSCH/PSCCH is received from a higher layer (or upper layer).
- the higher layer requests the user equipment to determine the transmission resource of PSSCH/PSCCH on time slot slot n.
- the higher layer (being the physical layer) provides parameters for the PSSCH/PSCCH transmission.
- the parameter used for the PSSCH/PSCCH transmission includes at least the number L subCH of sub-channels used for PSSCH/PSCCH transmission.
- step S102 the sideline communication user equipment determines candidate resources (candidate resources).
- a candidate single-slot resource is defined as a slot in the resource pool and, optionally, the user equipment assumes (or, assumes, assumes) the set of L subCH consecutive sub-channels on the During the active period of discontinuous communication reception (SL DRX active time), any set of the L subCH continuous sub-channels included in the resource pool (in any time slot) corresponds to a single-slot candidate resource.
- T1 and T2 are determined by the specific implementation of the user equipment, or [n+T1, n+T2] represents a resource selection window. This embodiment does not impose any limitation on this.
- 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.
- the steps performed by the user equipment include:
- step S201 a request (request, or trigger) for determining transmission resources of PSSCH/PSCCH is received from a higher layer (or upper layer).
- the higher layer requests the user equipment to determine the transmission resource of PSSCH/PSCCH on time slot slot n.
- the higher layer (being the physical layer) provides parameters for the PSSCH/PSCCH transmission.
- step S202 the sideline communication user equipment determines the active period active time of the sideline communication discontinuously receiving SLDRX.
- step S203 the sideline communication user equipment determines a set of listening time slots.
- the set of listening time slots at least includes all or part of the time slots in the resource pool within [n, n + TB] (or, [n+1, n + TB]); and, optionally Ground, the time interval [n, n+T B ] (or, [n+1, n+T B ]) at least satisfies the condition: [n, n+T B ] (or, [n+1, n+ T B ]) within the active time of the active period of the SL DRX.
- the TB is the 31st time slot in the resource pool starting from the time slot n (or, on this basis, forward or subtract or time slots), or, the TB is the 32nd time slot in the resource pool starting from the time slot n (or, on this basis, forward or subtract or time slots), n is a natural number.
- FIG. 4 is a schematic diagram illustrating a basic process of a method performed by a user equipment according to Embodiment 3 of the present invention.
- the steps performed by the user equipment include:
- step S201 a request (request, or trigger) for determining transmission resources of PSSCH/PSCCH is received from a higher layer (or upper layer).
- the higher layer requests the user equipment to determine the transmission resource of PSSCH/PSCCH on time slot slot n.
- the higher layer (being the physical layer) provides parameters for the PSSCH/PSCCH transmission.
- step S202 optionally, the sideline communication user equipment determines the active period active time of the sideline communication discontinuously receiving SLDRX.
- step S203 the sideline communication user equipment determines a set of listening time slots.
- the set of listening time slots includes at least a time interval between [n, n + TB] (or, [n+1, n + TB]) and an active time during the active period of the SL DRX. All or part of the time slots in the resource pool.
- the TB is the 31st time slot in the resource pool starting from the time slot n (or, on this basis, forward or subtract or time slots), or, the TB is the 32nd time slot in the resource pool starting from the time slot n (or, on this basis, forward or subtract or time slots), n is a natural number.
- FIG. 5 is a schematic diagram illustrating a basic process of a method performed by a user equipment according to Embodiment 4 of the present invention.
- the steps performed by the user equipment include:
- step S301 the first sideline communication user equipment receives the time interval indication information sent by the second sideline communication user equipment.
- the second user equipment sends through PC5 RRC signaling, or sends the time interval indication information through SCI.
- the time interval indicated by the time interval indication information represents the PSFCH reception processing and retransmission preparation (including channel multiplexing, transmission/reception switching, and reception/transmission switching) determined by the second user equipment. time.
- the time interval is determined by the specific implementation of the second sideline communication user equipment (up to UE implementation).
- the communication between the first user equipment and the second user equipment is unicast unicast communication.
- step S302 the first user equipment determines the duration of the round-trip timer RTT timer of the discontinuous reception of SLDRX in sideline communication.
- the duration of the round-trip timer RTT timer is at least determined by the time interval, and/or the configured (or pre-configured) minimum time interval s1-MinTimeGapPSFCH between PSSCH and PSFCH, and/or configured The period sl-PSFCH-Period of the (or pre-configured) PSFCH is determined.
- FIG. 6 is a schematic diagram illustrating a basic process of a method performed by a user equipment according to Embodiment 5 of the present invention.
- the steps performed by the user equipment include:
- step S401 the sideline communication user equipment acquires the configuration information of the sideline communication resource pool.
- the configuration information of the sideline communication resource pool at least includes the minimum time interval s1-MinTimeGapPSFCH between the PSSCH and the PSFCH, and the period s1-PSFCH-Period of the PSFCH.
- step S402 the receiving user equipment determines the duration of the round-trip timer RTT timer for discontinuous reception of SLDRX in sideline communication.
- the duration of the round-trip timer RTT timer is equal to the minimum value of the time required by the user equipment for PSFCH reception processing and retransmission preparation (including channel multiplexing, sending/receiving switching, and receiving/sending switching), or,
- the duration of the round-trip timer RTT timer is equal to the sum of the minimum value of the time required by the user equipment for PSFCH reception processing, retransmission preparation (including channel multiplexing, transmission/reception switching and reception/transmission switching) and a time interval time interval.
- the time interval is determined by at least the minimum time interval s1-MinTimeGapPSFCH between the PSSCH and the PSFCH, and the period s1-PSFCH-Period of the PSFCH.
- FIG. 7 is a schematic diagram illustrating a basic process of a method performed by a user equipment according to Embodiment 6 of the present invention.
- the steps performed by the user equipment include:
- a higher layer (higher layer, or upper layer) requests (request, or triggers a trigger) a sideline communication user equipment (physical layer) to determine the transmission resources of PSSCH/PSCCH.
- the higher layer requests the user equipment to determine the transmission resource of PSSCH/PSCCH on time slot slot n.
- step S502 the sideline communication user equipment determines a set of candidate slots (candidate slots).
- the manner in which the user equipment determines the set of candidate time slots depends on the implementation of the user equipment (up to UE implementation).
- step S503 the sideline communication user equipment determines a set of time slots to monitor.
- the monitoring time slot set monitored by the user equipment includes at least time slots or time slot or time slot All or part of the time slots in the resource pool that are coincident with the 31 or 32 previous resource pool time slots and/or the sideline discontinuous reception active period SL DRX active time; optionally, if in time slot or time slot or time slot The time of the previous 31 or 32 resource pool time slots is earlier than the time slot n, then, the monitoring time slot set of the user equipment (shall monitor, or monitor) at least includes time slots or time slot or time slot All or part of the time slots in the resource pool that coincide with the time slot n and/or the sideline discontinuous reception active period SL DRX active time. in, is any time slot in the candidate time slot set, for example, the first one, the last one, which is not limited in the present invention.
- FIG. 7 is a schematic diagram illustrating a basic process of a method performed by a user equipment according to Embodiment 7 of the present invention.
- Embodiment 7 of the present invention will be described in detail with reference to the basic process diagram shown in FIG. 7 .
- the steps performed by the user equipment include:
- a higher layer (higher layer, or upper layer) requests (request, or triggers a trigger) a sideline communication user equipment (physical layer) to determine the transmission resources of PSSCH/PSCCH.
- the higher layer requests the user equipment to determine the transmission resource of PSSCH/PSCCH on time slot slot n.
- step S502 the sideline communication user equipment determines a set of candidate slots (candidate slots).
- the manner in which the user equipment determines the set of candidate time slots depends on the implementation of the user equipment (up to UE implementation).
- step S503 the sideline communication user equipment determines a set of time slots to monitor.
- time slot or time slot or time slot The time of the previous 31 or 32 resource pool time slots is later than or equal to the time slot n, then the time slot or time slot or time slot All or part of the time slots in the resource pool between the previous 31 or the previous 32 resource pool time slots belong to the active period SL DRX active time of discontinuous reception of sideline communication; or time slot or time slot
- the time of the previous 31 or 32 resource pool time slots is earlier than the time slot n, then the time slot or time slot or time slot All or part of the time slots in the resource pool between the time slot n and the time slot n belong to the active period SL DRX active time of discontinuous reception of sideline communication.
- FIG. 8 is a block diagram showing a user equipment UE according to the present invention.
- 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.
- the memory 802 has program instructions stored thereon. 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.
- the above-described embodiments of the present invention may be implemented by software, hardware, or a combination of both software and hardware.
- 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.
- DSP digital signal processing
- ASICs Application Specific Integrated Circuits
- FPGAs Field Programmable Gate Arrays
- CPLDs Programmable Logic Devices
- 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.
- embodiments of the invention disclosed herein may be implemented on a computer program product.
- the computer program product is a product having a computer-readable medium on which computer program logic is encoded, and when executed on a computing device, the computer program logic provides relevant operations to achieve The above technical solutions of the present invention.
- computer program logic When executed on at least one processor of a computing system, 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.
- 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.
- the present invention can also use the integrated circuit obtained by using the advanced technology.
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Abstract
Description
μ | Δf=2 μ·15[kHz] | CP(循环前缀) |
0 | 15 | 正常 |
1 | 30 | 正常 |
2 | 60 | 正常,扩展 |
3 | 120 | 正常 |
4 | 240 | 正常 |
Claims (10)
- 一种由用户设备UE执行的方法,包括:从高层接收确定PSSCH/PSCCH的传输资源的请求,所述用户设备确定侧行通信不连续接收的活跃期,所述用户设备确定监听时隙的集合。
- 根据权利要求1所述的由用户设备执行的方法,还包括,在时隙n上从高层接收确定PSSCH/PSCCH的传输资源的请求。
- 一种由用户设备UE执行的方法,包括:第一用户设备接收第二用户设备发送的时间间隔指示信息,所述第一用户设备确定侧行通信不连续接收的往返定时器的时长。
- 根据权利要求5所述的由用户设备执行的方法,其特征在于,所述时间间隔指示信息所指示的时间间隔表示所述第二用户设备确定的PSFCH接收处理、重传准备所需的时间。
- 根据权利要求5所述的由用户设备执行的方法,其特征在于,所述第一用户设备至少根据所述时间间隔指示信息确定所述侧行通信不连续接收的往返定时器的时长。
- 一种由用户设备UE执行的方法,包括:用户设备获取侧行通信资源池的配置信息,所述接收用户设备确定侧行通信不连续接收的往返定时器的时长。
- 根据权利要求8所述的由用户设备执行的方法,其特征在于,所述侧行通信资源池的配置信息至少包括PSSCH和PSFCH之间的最小时域间隔sl-MinTimeGapPSFCH,以及,PSFCH的周期sl-PSFCH-Period。
- 一种用户设备,包括:处理器;以及存储器,存储有指令;其中,所述指令在由所述处理器运行时执行根据权利要求1至9中的任一项所述的方法。
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- 2022-03-30 EP EP22778999.7A patent/EP4319221A1/en active Pending
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