TW202139769A - Methods and apparatus for slot configuration for sidelink communication - Google Patents

Abstract

Aspects of the disclosure provide a method of sidelink slot configuration. The method can include obtaining a sidelink (SL) （pre-）configuration for an SL operation using an SL by a user equipment (UE) in a wireless network, wherein the UE is configured with a Uu link with a base station in the wireless network; receiving a time division duplex (TDD) uplink/downlink (UL/DL) configuration; determining an SL slot configuration for the SL based on the SL (pre-)configuration, the TDD UL/DL configuration, and a reference numerology; and performing SL transceiving through the SL based on the determined SL slot configuration.

Description

Side link time slot configuration method and device

The present invention generally relates to wireless communication, and, more specifically, to sidelink (sidelink, SL) time slot configuration and resource configuration.

5G radio access technology will become a key component of modern access networks, and it will address the growth of high communication volume and the ever-increasing demand for high-bandwidth connections. In 3GPP new radio (NR), SL continues to evolve. With the support of new features, SL provides low latency, high reliability and high throughput for device-to-device communication. Support SL measurement in vehicle to everything (V2X). Unicast, multicast and broadcast all support V2X SL communication. In order to support efficient SL communication, SL resource allocation needs to consider the different configuration requirements and scenarios of the SL path and the Uu link path. Resource configuration includes channel state information reference signal (CSI-RS) resource configuration and reporting, and bandwidth part (BWP) configuration for SL communication. In addition, the time slot configuration of SL has common attributes with existing Uu links. SL and Uu links share configuration information to improve system efficiency. However, SL can be configured with different parameter sets (numerology), and time slot configuration requires additional steps.

Therefore, SL time slot configuration and side link resource configuration need to be improved and enhanced.

An embodiment of the present invention provides a side link time slot configuration method, which includes: obtaining a side link (pre) configuration for side link operation by a user equipment through a side link in a wireless network, wherein the user The device is configured with a Uu link connected to the base station in the wireless network; receiving time division duplex uplink/downlink configuration; based on the side link (pre) configuration, time division duplex uplink The path/downlink configuration and reference parameter set determine the side link time slot configuration of the side link; and perform side link transmission and reception through the side link based on the determined side link time slot configuration.

Another embodiment of the present invention provides a user equipment, including: a transceiver, used to send and receive radio frequency signals in a wireless network; a side link configuration module, used to obtain a side link in a wireless network The link (pre) configuration is used for side link operation, wherein the user equipment is configured with a Uu link connected to the base station in the wireless network; a synchronization module is used to receive the time division duplex uplink Path/downlink configuration; side link time slot module, used to determine the side link based on the side link (pre)configuration, time division duplex uplink/downlink configuration and reference parameter set The side link time slot configuration; and the side link control module, which is used to perform side link transmission and reception through the side link based on the determined side link time slot configuration.

Now some embodiments of the present invention are given in detail for reference, and examples thereof are described in the accompanying drawings.

In the NR wireless network, SL is enabled. NR V2X supports the transmission of CSI-RS. The CSI-RS is transmitted in the physical sidelink shared channel (PSSCH), and can only be transmitted when the higher layer (higher layer) signaling enables the SL CQI/RI report. The SL CQI/RI report from the RX UE is enabled at the physical layer by sidelink control information (SCI) to help the TX UE perform link adaptation (link adaptation). The traditional CSI report on Uu is performed at the physical layer. The parameter set of the frame structure defines the frame/slot structure, such as subcarrier spacing (SCS) and symbol length. Unlike the LTE network, the parameter set in the NR network supports different types of SCS. The time slot configuration of SL communication needs to consider the parameter set difference between SL and Uu links.

Figure 1 is a system schematic diagram of an exemplary wireless network (system) for side link time slot configuration and resource configuration according to an embodiment of the present invention. The wireless system 100 includes one or more fixed infrastructure units that form a network distributed over a geographic area. The basic facility unit may also be called an access point, an access terminal, a base station, a node B, an evolved node B (eNode-B), a next generation node B (gNB), or other terms used in the art. The network can be a homogeneous network or a heterogeneous network, and can be deployed at the same or different frequencies. gNB 101 is an exemplary base station in the NR network.

The wireless network 100 also includes multiple communication devices or mobile stations, such as user equipment (UE) 111, 112, 113, 114, 115, 116, and 117. The exemplary mobile device in the wireless network 100 has SL capability. The mobile device can establish one or more connections with one or more base stations (such as gNB 101). The UE 111 has an access link with the gNB 101, including uplink (UL) and downlink (DL). The UE 112, which is also served by the gNB 101, can also establish UL and DL with the gNB 101. UE 111 and UE 112 establish an SL. Both UE 111 and UE 112 are devices within coverage. Mobile devices on the vehicle (such as mobile devices 113, 114, and 115) also have SL capabilities. Mobile devices 113 and 114 are covered by gNB 101. The device 113 in the coverage area establishes an SL with the device 114 in the coverage area. The mobile device 115 on the vehicle is an out-of-coverage device. The mobile device 114 within the coverage area establishes an SL with the device 115 outside the coverage area. In other embodiments, mobile devices such as UE 116 and 117 may be out of coverage, but can send and receive packet data with one or more mobile devices through a side link.

Figure 1 further shows a simplified block diagram of a base station and mobile device/UE for side link time slot configuration and resource configuration. The gNB 101 has an antenna 156, which transmits and receives radio signals. The RF transceiver circuit 153 coupled to the antenna receives the RF signal from the antenna 156, converts the RF signal into a baseband signal, and sends the baseband signal to the processor 152. The RF transceiver 153 also converts the baseband signal received from the processor 152 into an RF signal, and transmits it to the antenna 156. The processor 152 processes the received baseband signal, and calls different functional modules to execute the functional characteristics in the gNB 101. The memory 151 stores program instructions and data 154 to control the operation of the gNB 101. The gNB 101 also includes a set of control modules 155 for performing functional tasks to communicate with the mobile station.

The UE 111 has an antenna 165 for transmitting and receiving radio signals. The RF transceiver circuit 163 coupled to the antenna receives the RF signal from the antenna 165, converts the RF signal into a baseband signal, and sends the baseband signal to the processor 162. In an embodiment, the RF transceiver may include two RF modules (not shown). The first RF module is used for high frequency (HF) transmission and reception; the other RF module is different from the HF transceiver and is used for transmission and reception in different frequency bands. The RF transceiver 163 also converts the baseband signal received from the processor 162 into an RF signal, and transmits it to the antenna 165. The processor 162 processes the received baseband signal, and calls different functional modules to execute the functional characteristics in the UE 111. The memory 161 stores program instructions and data 164 to control the operation of the UE 111. The antenna 165 sends uplink transmissions to the antenna 156 of the gNB 101 and receives downlink transmissions from the antenna 156 of the gNB 101.

The UE 111 also includes a set of control modules for performing functional tasks. These functional modules can be implemented by circuits, software, firmware, or a combination of the above. The SL configuration module 191 uses the SL in the wireless network to obtain the SL (pre) configuration for the SL operation, where the UE is configured with a Uu link to connect to the base station in the wireless network. The synchronization module 192 receives a time division duplex (TDD) UL/DL configuration. The SL time slot module 193 determines the SL time slot configuration for the SL based on the SL (pre) configuration, the TDD UL/DL configuration, and the reference parameter set. The SL control module 194 performs SL transmission and reception through the SL based on the determined SL time slot configuration.

FIG. 2 is a schematic diagram of an exemplary NR wireless system with a centralized upper layer of NR radio interface stacking according to an embodiment of the present invention. There may be different protocol partitioning options between the upper layer of the central unit (CU)/gNB node and the lower layer of the distributed unit (DU)/gNB node. The division of functions between the central unit and the gNB lower layer may depend on the transport layer. Since the higher protocol layers have lower performance requirements for the transmission layer in terms of bandwidth, delay, synchronization and jitter, the low performance transmission between the central unit and the gNB lower layer can enable the high protocol layer of the NR radio stack in the central unit Get support. In one embodiment, the service data adaptation protocol (SDAP) and packet data convergence protocol (PDCP) layers are located in the central unit, and the radio link control (RLC), The media access control (MAC) and physical (PHY) layers are located in distributed units. The core unit 201 is connected to a central unit 211 having a gNB upper layer 252. In an embodiment 250, the gNB upper layer 252 includes a PDCP layer and an optional SDAP layer. The central unit 211 is connected to the decentralized units 221, 222, and 223, where the decentralized units 221, 222, and 223 correspond to the cells 231, 232, and 233, respectively. The distributed units 221, 222, and 223 include the gNB lower layer 251. In an embodiment, the gNB lower layer 251 includes PHY, MAC, and RLC layers. In another embodiment 260, each gNB has a protocol stack 261 including SDAP, PDCP, RLC, MAC, and PHY layers.

Figure 3 is a schematic diagram of an exemplary top-level function for side link time slot configuration and resource configuration according to an embodiment of the present invention. UE 301 and UE 302 are connected to gNB 303 in the NR network through Uu links 311 and 312, respectively. In an embodiment, side links 313 are configured for UE 301 and UE 302.

In an embodiment 321, the SL time slot configuration is based on a reference parameter set. The UE obtains the side link configuration and the TDD downlink/uplink configuration. The SL time slot configuration is based on the Uu link parameter set and the side link parameter set. The UE obtains a reference pattern for time slot configuration, and obtains the SL time slot pattern or the UL time slot pattern by considering different granularities.

In another embodiment 322, CSI-RS resource configuration is performed for side link communication. For the CSI-RS transmission used for CSI measurement, rate matching can be performed according to the existence of the SCI field (such as the second stage SCI) used for the CSI request and the configuration of the CSI-RS resource. Specifically, the presence or absence of the CSI request field can determine whether to perform rate matching, and the configuration of CSI-RS resources can be used to determine how to perform rate matching. In addition, CSI-RS resources can be mapped to physical sidelink shared channel (PSSCH) resources of a transport block (transport block, TB). In other words, it cannot be mapped to the PSSCH that transmits the second-stage SCI and/or the PSSCH that carries the first-stage SCI. In other embodiments, it can be punctured to reduce complexity. The assumed CSI table should be indicated in the SCI (such as the second stage SCI) and/or high-level signaling, so that the UE can obtain an appropriate CSI index based on the CSI measurement.

In yet another embodiment 323, resource pool configuration and allocation may be performed for SL communication. For resource pool allocation, special sub-channels can be introduced to accommodate resources (or resource blocks (resource block, RB)) that are not multiples of the sub-channel size or smaller than the sub-channel size. For such special sub-channels, it can be limited to PSSCH transmission or FDM multiplexed PSSCH and physical sidelink control channel (PSCCH) transmission. In an embodiment, if the PSCCH is available, the PSCCH may span all symbols in the SL time slot except for the GP symbol and the physical sidelink feedback channel (physical sidelink feedback channel, PSFCH) symbol. Multiple resource pools can be configured with different sub-channel sizes, and the UE can select resource pools randomly or based on rules (such as the priority order of resource pools).

In an embodiment, the SL time slot configuration can be obtained based on the UL time slot configuration and the reference parameter set.

FIG. 4 is an exemplary schematic diagram of a side link time slot configuration including an NR frame and a time slot structure according to an embodiment of the present invention. An exemplary NR frame structure 410 shows a frame 411, a sub-frame 412, and a time slot 413. The 10 ms frame 411 includes 10 sub-frames, each of which has 1 ms. The subframe 412 includes one or more time slots, depending on the subcarrier spacing in the parameter set. Each slot contains multiple symbols. 420 shows exemplary parameters in the NR parameter set. The parameter set is defined by the SCS and cyclic prefix (CP) overhead. NR network supports multiple SCS. Multiple SCSs can be obtained by scaling the basic SCS by integers. 420 shows SCS parameters used for parameter set configuration. The NR network supports multiple SCS, including 15kHz, 30kHz, 60kHz, 120kHz, etc. The parameter set parameter μ is an integer of {0, 1, 2, 3,...}, and each integer corresponds to a SCS. Each NR subframe has a length of 1ms, and the number of time slots in each subframe is based on SCS, which is equal to 2µ. The time slot duration is 1/2 µms. In other embodiments, the NR network supports more SCS, such as 240kHz. 420 shows exemplary parameters.

In the NR network, multiple SCSs are supported for time slot configuration. In the current system, time slots can be classified into downlink, uplink, hybrid UL and DL transmission. In TDD, time slots can be configured for mixed use of UL and DL. NR TDD uses flexible time slot configuration. The slot format configuration in NR can be static, semi-static and dynamic. It can support static and semi-static time slot configuration through signaling messages, such as radio resource control (radio resource control, RRC) messages. The dynamic configuration for time slot configuration uses physical downlink control channel (physical downlink control channel, PDCCH) downlink control information (DCI). Time slot configuration can be realized through RRC messages (such as tdd-UL-DL-ConfigurationCommon). The time slot configuration can be configured with only one style or two styles. 430 shows an exemplary time slot configured with only pattern 1 and a parameter set parameter of μ _ref. A single UL/DL pattern is periodically transmitted in dl-UL-TransmissionPeriodicity 431. The total number of time slots in the period 431 is determined based on the period and the configured SCS. The number of DL time slots 432 and the number of UL time slots 433 are configured in the period 431. The number of DL symbols in the DL/flexible (D/F) time slot 434 and the number of UL symbols in the flexible/UL (F/D) time slot 435 can also be configured.

Utilizing the configuration parameters, the UL time slot associated with the configured pattern can be exported from the TDD UL/DL configuration. In an embodiment, the TDD UL/DL configuration is carried by a system information block (SIB). When the parameter sets of the Uu link and the side link are different, the number of side link time slots is also based on the parameter set difference between the SL and Uu link. The number of UL time slots is also based on the parameter set difference. 440 shows an exemplary scenario in which the side link time slot configuration is obtained based on the parameter set difference between the Uu link/interface and the side link. Referring to the example of 430, the side link time slot configuration uses TDD UL/DL configuration information to export the number of side link time slots. In one embodiment, it is assumed that the Uu interface μ _ref =2. The side link configuration 442 has the same number of side link time slots as the number of uplink time slots. When μ=1, the side link configuration 443 is configured such that the number of side link time slots is half of the uplink time slots. Similarly, when μ=3, the side link configuration 441 is configured such that the number of side link time slots is twice the number of uplink time slots. In addition, as shown in 444, when the side link and the Uu link have different parameter sets, the difference in the parameter sets may cause additional side link time slots based on the number of uplink symbols and the reference parameter set. The number of side link time slots in the side link time slot configuration is based on the reference parameter set.

Figure 5 is an exemplary diagram of side link time slot configuration based on a reference parameter set according to an embodiment of the present invention. UE 501 and UE 502 are respectively connected to gNB 503 through Uu links 511 and 512 in the NR network. UE 501 and UE 502 are configured with a side link configuration for side link 513. The UE determines the side link time slot configuration 520 based on the reference pattern and reference parameter set used for the time slot configuration. The SL slot configuration 520 configuration only includes the number and/or location of SL slots of SL symbols. The SL time slot configuration 520 includes an SL period configuration 521 and a configuration 522 of the number of SL time slots. The UE carries/indicates configurations 521 and 522 in a sidelink synchronization signal block (S-SSB) 550. For the TDD UL/DL information carried in the S-SSB used to determine the available SL time slots, the S-SSB that can be obtained from the Uu interface (such as SIB messages) indicates the single cycle related to the UL time slot of each cycle Style and dual-cycle style. The SL period configuration 521 including the period configuration and the pattern indication can be obtained through the TDD UL/DL configuration 552. In an embodiment, the TDD UL/DL configuration 552 is carried by the SIB message.

The bits in S-SSB are limited, so all combinations cannot be carried. In order to save bits, for the same pattern in each cycle in the double cycle, that is, {P1=n, P2=n}, the same indication can be used for different values of n through different nuances. For example, for the two-period mode {P1, P2}={5, 5}, the consecutive SL or UL time slots of the pattern {5, 5} are indicated by some bits. For other patterns with the same period of P1 and P2, namely {2, 2}, {2.5, 2.5} and {10, 10}, please refer to the SL or UL time slot indication for pattern {5, 5}, Draw the difference of the corresponding information and parameter set. As shown in 430 and 440, when a reference pattern such as 430 is configured, the UE may derive the SL or UL time slot configuration based on the reference pattern configuration in 430. The configuration in 440 is applicable to side link and uplink time slot configuration, and its parameter set is different from the reference parameter set µ _ref .

The number of SL time slots 522 can be obtained through the Uu link time slot configuration 532 and the side link parameter set 531. The Uu link time slot configuration 532 includes a Uu link parameter set or reference parameter set 535, and the number of UL time slots or the number of reference time slots 536. The above UL time slot includes only UL symbols. The Uu link time slot configuration 532 can be obtained from the TDD UL/DL configuration 552. The SL parameter set 531 may be (pre-)configured for the side link operation. In an embodiment, the SL parameter set 531 may be obtained from the SL signaling message 553 (such as an RRC message). In yet another embodiment, for the inter-carrier indication of the eNB/gNB switching from one frequency to another frequency for TDD UL/DL configuration for SL operation, the base station signaling for SL operation may be used, such as A dedicated RRC or SIB message for SL operation to indicate the parameter set related to the TDD UL/DL configuration for the SL frequency. In an embodiment, the reference parameter set is a Uu link parameter set. According to different embodiments, the reference parameter set and the side link parameter set (pre) are configured with the same or different parameter sets.

Figure 6 is an exemplary schematic diagram for side link CSI-RS resource configuration according to an embodiment of the present invention. In an embodiment, CSI-RS 610 for SL CSI measurement is configured. In an embodiment 611, the configuration 610 maps resources to PSSCH symbols used for TB transmission. In another embodiment 612, a breakdown resource is used. For the CSI-RS transmission used for CSI measurement, rate matching can be performed according to the existence of the SCI field (such as the second stage SCI) used for the CSI request and the configuration of the CSI-RS resource. In addition, in an embodiment, the CSI-RS resource is mapped on the PSSCH resource for transmitting the TB. CSI-RS resources cannot be mapped to the PSSCH transmitting the second-stage SCI and/or the PSSCH carrying the first-stage SCI, because the UE needs to match the deceleration rate to decode the first-stage SCI and the second-stage SCI that carry the CSI request field. Since the resource size of the second-stage SCI may change, the exact CSI-RS resource location may also change, so as to avoid conflicts between the second-stage SCI and the first-stage SCI resources. CSI-RS resources can only be mapped to PSSCH symbols used for TB transmission (that is, there is no first-stage SCI and second-stage SCI transmission). In an embodiment, the exact CSI-RS resource location can be obtained implicitly according to the time/frequency resources of the first stage SCI and/or the second stage SCI, or the exact CSI-RS resource location can be obtained according to the configuration. In another embodiment, SL CSI-RS resources can be broken down. For the UE receiver, these will be transparent, and the performance degradation will be small or negligible.

In another embodiment, an SL CSI table 620 for CSI reporting is configured. In an embodiment 621, SL CSI report resources are configured according to resource pool/BWP. In another embodiment 622, the SL CSI report resource is indicated in the SCI field. For SL CSI reports, an assumed SL CSI table (such as 64QAM, 256QAM or ultra reliable low latency communication (URLLC) table) and/or an assumed SL can be configured for each resource pool/BWP The CSI table can be exchanged between UEs through PC5-RRC. In other embodiments, a hypothetical SL CSI table may be indicated from a set of (pre-)configured CSI tables in the SCI field (such as the second stage SCI). In this way, based on SL CSI reports obtained from different hypothetical SL CSI tables corresponding to different SL MCS tables, it is possible to dynamically switch between SL MCS tables. In an embodiment, the SCI and/or high-level signaling only indicates a hypothetical CSI table, and the reported CSI is implicitly associated with this hypothesis. In another embodiment, multiple hypothetical CSI tables are indicated. The UE may report the CSI associated with the assumed CSI table index, that is, different CSI reports are associated with different CSI tables. In the case where multiple CSI resources are configured, the UE may report the CSI result associated with the corresponding CSI-RS resource index.

Figure 7 is an exemplary schematic diagram of side link BWP configuration and allocation according to an embodiment of the present invention. In the NR network, the sub-channel is configured with N RBs. The SL BWP configuration 710 configures the SL BWP by the number of RBs instead of a multiple of the subchannel size.

In an embodiment 711, one or more resource pools may be configured to utilize minimized fragmented resources (that is, a multiple of or less than the sub-channel size) to make full use of all resources. For example, multiple resource pools can be configured to have different subchannel sizes, so that segmentation resources are very limited. The UE can select the resource pool randomly or based on rules (such as the priority order of the resource pool).

In another embodiment 712, the segmented resources may be configured to use separate resource pools for PSSCH and/or PSCCH and/or PSFCH transmission. Any number of PRBs can be configured for the resource pool.

In another embodiment 713, the most (or at least) one resource pool in the SL BWP may be configured with RBs that are not a multiple of the subchannel size. For example, multiple resource pools can be configured for the SL BWP, where the RB configured by the most (or at least) one resource pool is not a multiple of the subchannel size. PSSCH transmission/reception will be limited to those resources that are multiples of the subchannel size. The smallest RB index in the smallest subchannel index of the resource pool is the smallest RB index of the resource pool. The remaining RBs in the resource pool (that is, RBs smaller than the size of the subchannel) can be designated as special subchannels. The above special subchannels can be used for PSSCH transmission, but cannot be used for PSCCH transmission, which can be regarded as a supplementary subchannel for PSSCH transmission. aisle. This special subchannel can carry PSCCH and PSSCH through FDM multiplexing. In this case, PSCCH can be transmitted on all symbols except GP symbols and PSFCH symbols in the SL slot (if available).

Fig. 8 is an exemplary flow chart of the configuration process of the side link time slot based on the reference parameter set according to an embodiment of the present invention. In step 801, the UE obtains an SL (pre) configuration for SL operation through SL in the wireless network, where the UE is configured with a Uu link connected to a base station in the wireless network. In step 802, the UE receives the TDD UL/DL configuration. In step 803, the UE determines the SL time slot configuration of the SL based on the SL configuration, the TDD UL/DL configuration and the reference parameter set. In step 804, the UE performs SL transmission and reception through the SL based on the determined SL time slot configuration.

In one embodiment, a storage medium (such as a computer-readable storage medium) stores a program, and when the above-mentioned program is executed, the UE executes the embodiment of the present invention.

Although the present invention has been disclosed above for the preferred embodiments, it is not intended to limit the present invention. Without departing from the scope of protection of the present invention defined by the scope of the patent application, various changes, modifications and combinations can be made to the features in the embodiments.

100: wireless system 111-117, 301-302, 501-502: user equipment 101, 303, 503: base station 151, 161: Memory 152, 162: Processor 153, 163: Transceiver 154, 164: Program 155: Control Module 156, 165: Antenna 191: SL configuration module 192: Synchronization module 193: SL time slot module 194: SL control module 201: core unit 211: Central Unit 221-223: Distributed unit 231-233: Community 250, 260, 321-323, 611-612, 621-622, 711-713: Examples 251: gNB lower layer 252: gNB upper layer 261: Protocol Stack 311, 312, 511, 512: Uu link 313, 513: SL 410: frame structure 411: frame 412: subframe 413, 432-435: time slot 420: parameter set 430: Time slot configuration 431: cycle 440-444, 520: Side link time slot configuration 521: SL cycle configuration 522: Configuration of the number of SL time slots 531: Side link parameter set 532: Uu link time slot configuration 535: Uu link parameter set 536: Number of UL time slots 550: S-SSB 552: TDD UL/DL configuration 553: SL signaling 610: CSI-RS for SL CSI measurement 620: SL CSI table for CSI report 710: SL BWP configuration 801-804: steps

You can understand this application more comprehensively by reading the detailed description and examples that follow with reference to the accompanying drawings, in which: Figure 1 is a system schematic diagram of an exemplary wireless network (system) for side link time slot configuration and resource configuration according to an embodiment of the present invention. FIG. 2 is a schematic diagram of an exemplary NR wireless system with a centralized upper layer of NR radio interface stacking according to an embodiment of the present invention. Figure 3 is a schematic diagram of an exemplary top-level function for side link time slot configuration and resource configuration according to an embodiment of the present invention. FIG. 4 is an exemplary schematic diagram of a side link time slot configuration including an NR frame and a time slot structure according to an embodiment of the present invention. Figure 5 is an exemplary diagram of side link time slot configuration based on a reference parameter set according to an embodiment of the present invention. Figure 6 is an exemplary schematic diagram for side link CSI-RS resource configuration according to an embodiment of the present invention. Figure 7 is an exemplary schematic diagram of side link BWP configuration and allocation according to an embodiment of the present invention. Fig. 8 is an exemplary flow chart of the configuration process of the side link time slot based on the reference parameter set according to an embodiment of the present invention.

801-804: steps

Claims (10)

A side link time slot configuration method, including: A side link (pre) configuration is acquired by a user equipment in a wireless network through a side link for side link operation, wherein the user equipment is configured to be connected to a base station in the wireless network A Uu link connected to each station; Receive a time division duplex uplink/downlink configuration; Determining the side link time slot configuration of the side link based on the side link (pre) configuration, the time division duplex uplink/downlink configuration, and a reference parameter set; and Perform side link transmission and reception through the side link based on the determined side link time slot configuration. The side link time slot configuration method according to claim 1, wherein the side link time slot configuration is used to configure the number and/or position of side link time slots that only include side link symbols. The side link time slot configuration method according to claim 2, wherein the number of side link time slots including only side link symbols is determined by the number of time slots including only uplink symbols, the reference parameter set, and One side link parameter set is obtained. The side link time slot configuration method according to claim 3, wherein the reference parameter set is a Uu link parameter set, and the Uu link parameter set and the side link parameter set (pre-)configured The same or different parameter sets. The side link time slot configuration method according to claim 3, wherein the reference parameter set is related to the time division duplex uplink/downlink configuration. The side link time slot configuration method according to claim 3, wherein the side link parameter set is (pre-)configured for the side link operation. The side link time slot configuration method according to claim 6, wherein the side link parameter set is (pre-)configured by receiving a signaling message, wherein the signaling message is a dedicated radio resource control message or A system block message. The side link time slot configuration method according to claim 3, wherein the number of time slots including only uplink symbols is obtained through the time division duplex uplink/downlink configuration. The side link time slot configuration method according to claim 2, wherein the number of side link time slots including only side link symbols is carried in a side link synchronization signal block. A user equipment including: A transceiver for sending and receiving radio frequency signals in a wireless network; The side link configuration module is used to obtain a side link (pre) configuration for side link operation through a side link in the wireless network, wherein the user equipment is configured with the A Uu link connected to a base station in a wireless network; A synchronization module for receiving a time division duplex uplink/downlink configuration; A side link time slot module, used to determine one side of the side link based on the side link (pre) configuration, the time division duplex uplink/downlink configuration, and a reference parameter set Link time slot configuration; and The side link control module is used to perform side link transmission and reception through the side link based on the determined side link time slot configuration.

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