TWI809372B - 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

Sidelink time slot configuration method and device

The present invention relates generally to wireless communications, and, more specifically, to sidelink (SL) slot allocation and resource allocation.

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

Therefore, SL 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, including: the user equipment acquires side link (pre)configuration for side link operation through the side link in the wireless network, wherein the user equipment The device is configured with a Uu link connected to the base station in the wireless network; receives a time division duplex uplink/downlink configuration; based on the side link (pre)configuration, time division duplex uplink determining a side link time slot configuration of the side link through a road/downlink configuration and a reference parameter set; and performing side link transceiving 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 through a side link in a wireless network link (pre)configuration for side link operation, wherein the user equipment is configured with a Uu link connected to a base station in the wireless network; a synchronization module for receiving time division duplex uplink road/downlink configuration; a sidelink slot module for determining said sidelink based on said sidelink (pre)configuration, time division duplex uplink/downlink configuration and a reference parameter set The side link time slot configuration; and a side link control module, configured to perform side link transceiving through the side link based on the determined side link time slot configuration.

Reference will now be made in detail to some embodiments of the invention, examples of which are illustrated in the accompanying drawings.

On 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 SL CQI/RI reporting is enabled by higher layer signaling. SL CQI/RI reporting from RX UEs is enabled at the physical layer by sidelink control information (SCI) to assist TX UEs in link adaptation. Traditional CSI reporting on Uu is performed at the physical layer. The frame structure parameter set defines the frame/slot structure, such as subcarrier spacing (SCS) and symbol length. Unlike LTE networks, the parameter sets in NR networks support different types of SCS. The time slot configuration for SL communication needs to take into account the difference in parameter sets between SL and Uu links.

FIG. 1 is a system schematic diagram of an exemplary wireless network (system) for sidelink time slot configuration and resource configuration according to an embodiment of the present invention. Wireless system 100 includes one or more fixed infrastructure units forming a network distributed over a geographical area. An infrastructure unit may also be called an access point, access terminal, base station, Node-B, evolved Node-B (eNode-B), next-generation Node-B (gNB), or other terminology used in the art. Networks can be homogeneous or heterogeneous, and can be deployed on the same or different frequencies. gNB 101 is an exemplary base station in the NR network.

The wireless network 100 also includes a plurality of communication devices or mobile stations, such as user equipment (UE) 111 , 112 , 113 , 114 , 115 , 116 and 117 . Exemplary mobile devices in wireless network 100 are SL capable. A mobile device can establish one or more connections with one or more base stations (eg, gNB 101 ). UE 111 has an access link with gNB 101, including uplink (uplink, UL) and downlink (downlink, DL). A UE 112 also served by gNB 101 may also establish UL and DL with gNB 101 . UE 111 establishes SL with UE 112 . Both UE 111 and UE 112 are devices within coverage. Mobile devices on the vehicle, such as mobile devices 113, 114, and 115, are also SL capable. Mobile devices 113 and 114 are covered by gNB 101 . The device 113 within the coverage establishes an SL with the device 114 within the coverage. The mobile device 115 on the vehicle is an out-of-coverage device. The in-coverage mobile device 114 establishes an SL with the out-of-coverage device 115 . In other embodiments, mobile devices such as UEs 116 and 117 may both be out of coverage, but may transmit and receive packet data with one or more other mobile devices via sidelinks.

FIG. 1 further shows a simplified block diagram of a base station and a mobile device/UE for sidelink slot allocation and resource allocation. The gNB 101 has an antenna 156, which transmits and receives radio signals. The RF transceiver circuit 153 coupled to the antenna receives RF signals from the antenna 156 , converts the RF signals to baseband signals, and sends the baseband signals to the processor 152 . The RF transceiver 153 also converts the baseband signal received from the processor 152 to an RF signal and sends it to the antenna 156 . The processor 152 processes the received baseband signal, and invokes 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 mobile stations.

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

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

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

FIG. 3 is a schematic diagram of exemplary top-level functions for sidelink 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 one embodiment, side link 313 is configured for UE 301 and UE 302 .

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

In another embodiment 322, CSI-RS resource allocation is performed for sidelink communication. For CSI-RS transmission for CSI measurement, rate matching can be performed according to the presence of the SCI field for CSI request (eg, Phase 2 SCI) and the configuration of CSI-RS resources. 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, the CSI-RS resource may be mapped to a physical sidelink shared channel (physical sidelink shared channel, PSSCH) resource for transmitting 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 may be punctured to reduce complexity. The assumed CSI table should be indicated in the SCI (such as the second phase SCI) and/or high layer signaling, so that the UE can obtain the appropriate CSI index based on the CSI measurement.

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

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

FIG. 4 is an exemplary diagram of a sidelink slot configuration including NR frame and slot structure according to an embodiment of the present invention. An exemplary NR frame structure 410 shows a frame 411, a subframe 412, and a time slot 413. A 10 ms frame 411 includes 10 subframes, each subframe is 1 ms. 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 the cyclic prefix (CP) overhead. The NR network supports multiple SCSs. Scaling the base SCS by an integer yields multiple SCSs. 420 shows SCS parameters for parameter set configuration. The NR network supports multiple SCSs, including 15kHz, 30kHz, 60kHz, 120kHz, etc. The parameter set parameter μ is an integer of {0, 1, 2, 3, ...}, each integer corresponds to one SCS. Each NR subframe has a length of 1 ms, and the number of slots per subframe is based on the SCS, equal to 2µ. The slot duration is 1/2µms. In other embodiments, the NR network supports more SCS, such as 240kHz. 420 shows exemplary parameters.

In NR networks, multiple SCSs are supported for slot configuration. In current systems, slots can be classified into downlink, uplink, mixed UL and DL transmissions. In TDD, slots can be configured for mixed use of UL and DL. NR TDD uses a flexible slot configuration. Slot format configuration in NR can be static, semi-static and dynamic. Static and semi-static slot configuration may be supported through signaling messages, such as radio resource control (RRC) messages. Dynamic configuration for slot configuration uses physical downlink control channel (PDCCH) downlink control information (DCI). Slot configuration can be achieved through RRC messages such as tdd-UL-DL-ConfigurationCommon. The time slot configuration can only be configured with one type, or two types can be configured. 430 shows an example slot configured with only style 1 and parameter set parameter μ _ref . A single UL/DL pattern is periodically transmitted with dl-UL-TransmissionPeriodicity 431 . The total number of slots in a cycle 431 is determined based on the cycle and the configured SCS. The number of DL slots 432 and the number of UL slots 433 are configured in a cycle 431 . The number of DL symbols in DL/flexible (D/F) slots 434 and the number of UL symbols in flexible/UL (F/D) slots 435 are also configurable.

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

Fig. 5 is an example 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 connected to gNB 503 through Uu links 511 and 512 respectively in the NR network. UE 501 and UE 502 are configured with a sidelink configuration for sidelink 513 . The UE determines 520 the sidelink slot configuration based on the reference pattern and reference parameter set for slot configuration. The SL slot configuration 520 configures the number and/or location of SL slots including only SL symbols. The SL slot configuration 520 includes an SL cycle configuration 521 and a configuration 522 of the number of SL slots. The UE carries/indicates the configurations 521 and 522 in a sidelink synchronization signal block (S-SSB) 550 . For the TDD UL/DL information carried in the S-SSB to determine the available SL slots, the single cycle associated with the UL slots of each cycle is indicated in the S-SSB obtained from the Uu interface (e.g. SIB message) style and double-period style. SL cycle configuration 521 including cycle configuration and pattern indication can be obtained through TDD UL/DL configuration 552 . In one embodiment, the TDD UL/DL configuration 552 is carried by a SIB message.

The bits in the S-SSB are limited, so not all combinations can be carried. To save bits, for the same pattern for each of the double periods, ie {P1=n, P2=n}, the same indication can be used with different nuances for different values of n. For example, for a two-period pattern {P1, P2} = {5, 5}, consecutive SL or UL slots of pattern {5, 5} are indicated by some bits. For other patterns where P1 and P2 have the same period, i.e. {2, 2}, {2.5, 2.5} and {10, 10}, refer to the SL or UL slot indication for pattern {5, 5}, The corresponding information and parameter set differences are derived. As shown in 430 and 440 , when the reference pattern as in 430 is configured, the UE may derive the SL or UL slot configuration based on the reference pattern configuration in 430 . The configuration in 440 applies to sidelink and uplink slot configurations with different parameter sets than the reference parameter set µ _ref .

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

FIG. 6 is an exemplary diagram for configuring sidelink CSI-RS resources according to an embodiment of the present invention. In an embodiment, a CSI-RS 610 for SL CSI measurement is configured. In an embodiment 611, the configuration 610 maps resources onto symbols of the PSSCH for TB transmission. In another embodiment 612, punctured resources are used. For CSI-RS transmission for CSI measurement, rate matching can be performed according to the presence of the SCI field for CSI request (eg, Phase 2 SCI) and the configuration of CSI-RS resources. In addition, in an embodiment, the CSI-RS resource is mapped on the PSSCH resource for transmitting the TB. The CSI-RS resources cannot be mapped to the PSSCH that transmits the stage 2 SCI and/or the PSSCH that carries the stage 1 SCI because the UE needs deceleration rate matching to decode the stage 1 SCI and the stage 2 SCI carrying 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 symbols of the PSSCH for TB transmission (ie without any phase 1 SCI and phase 2 SCI transmission). In an embodiment, the exact CSI-RS resource position can be obtained implicitly according to the time/frequency resource of the first-stage SCI and/or the second-stage SCI, or can be obtained according to configuration. In another embodiment, SL CSI-RS resources can be punctured. These will be transparent to the UE receiver with little or negligible performance degradation.

In another embodiment, a SL CSI table 620 for CSI reporting is configured. In an embodiment 621, SL CSI reporting resources are configured by resource pool/BWP. In another embodiment 622, the SL CSI reporting resource is indicated in the SCI field. For SL CSI reporting, an assumed SL CSI table (e.g. 64QAM, 256QAM, or ultra reliable low latency communication (URLLC) table), and/or an assumed SL CSI table can be configured per resource pool/BWP CSI tables can be exchanged between UEs through PC5-RRC. In other embodiments, the assumed SL CSI table may be indicated in the SCI field (eg Phase 2 SCI) from a set of (pre-)configured CSI tables. In this way, dynamic switching between SL MCS tables may be performed based on SL CSI reports derived from different hypothetical SL CSI tables corresponding to different SL MCS tables. In an embodiment, the SCI and/or high-level signaling only indicates an assumed CSI table, and the reported CSI is implicitly associated with this assumption. In another embodiment, multiple assumed 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 case multiple CSI resources are configured, the UE may report the CSI result associated with the corresponding CSI-RS resource index.

FIG. 7 is an exemplary schematic diagram of sidelink BWP configuration and allocation according to an embodiment of the present invention. In an NR network, a subchannel 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 (ie, not a multiple of the sub-channel size or smaller than the sub-channel size) to fully utilize all resources. For example, multiple resource pools can be configured with different subchannel sizes so that segment resources are very limited. The UE can select a resource pool randomly or based on rules (such as priority order of resource pools).

In another embodiment 712, 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 a resource pool.

In yet another embodiment 713, at 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 may be configured for the SL BWP, where at most (or at least) one resource pool is configured with RBs that are not a multiple of the size of the subchannel. 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 subchannel size) 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 sub-channel can carry PSCCH and PSSCH through FDM multiplexing. In this case, PSCCH may be transmitted on all symbols in the SL slot except GP symbols and PSFCH symbols (if available).

FIG. 8 is an exemplary flow chart of a sidelink slot configuration process based on a reference parameter set according to an embodiment of the present invention. In step 801, the UE acquires SL (pre)configuration for SL operation through SL in the wireless network, wherein the UE is configured with a Uu link connected to the base station in the wireless network. At step 802, the UE receives a TDD UL/DL configuration. In step 803, the UE determines the SL 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 transceiving through SL based on the determined SL time slot configuration.

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

Although the present invention has been disclosed above with respect to preferred embodiments, it is not intended to limit the present invention. Various changes, modifications and combinations can be made to each feature in each embodiment without departing from the scope of protection of the present invention defined by the patent scope of the application.

100: wireless system 111-117, 301-302, 501-502: user equipment 101, 303, 503: base stations 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: Decentralized Units 231-233: Community 250, 260, 321-323, 611-612, 621-622, 711-713: Examples 251: gNB lower layer 252: gNB upper layer 261: Protocol stacking 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 form for CSI reporting 710: SL BWP configuration 801-804: Steps

A more complete understanding of this application can be had by reading the ensuing detailed description and examples with reference to the accompanying drawings, in which: FIG. 1 is a system schematic diagram of an exemplary wireless network (system) for sidelink 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 an NR radio interface stack according to an embodiment of the present invention. FIG. 3 is a schematic diagram of exemplary top-level functions for sidelink time slot configuration and resource configuration according to an embodiment of the present invention. FIG. 4 is an exemplary diagram of a sidelink slot configuration including NR frame and slot structure according to an embodiment of the present invention. Fig. 5 is an example diagram of side link time slot configuration based on a reference parameter set according to an embodiment of the present invention. FIG. 6 is an exemplary diagram for configuring sidelink CSI-RS resources according to an embodiment of the present invention. FIG. 7 is an exemplary schematic diagram of sidelink BWP configuration and allocation according to an embodiment of the present invention. FIG. 8 is an exemplary flow chart of a sidelink slot configuration process based on a reference parameter set according to an embodiment of the present invention.

801-804: Steps

Claims (8)

A side link time slot configuration method, comprising: obtaining a side link (pre)configuration for side link operation by a user equipment in a wireless network through a side link, wherein the user equipment is configured by configured with a Uu link connected to a base station in said wireless network; receiving a time division duplex uplink/downlink configuration; based on said side link (pre)configuration, said time division duplex determining a sidelink time slot configuration for the sidelink with an uplink/downlink configuration and a reference parameter set; and performing a sidelink through the sidelink based on the determined sidelink time slot configuration Transceiver, wherein the side link slot configuration is used to configure the number and/or location of side link slots that only include side link symbols, and the number of side link slots that only include side link symbols is passed The number of time slots including only uplink symbols, the reference parameter set and one side link parameter set are obtained. The side link time slot configuration method as described in claim 1, wherein the reference parameter set is a Uu link parameter set, and the Uu link parameter set and the side link parameter set are (pre)configured with Same or different parameter sets. The sidelink time slot configuration method according to claim 1, wherein the reference parameter set is related to the time division duplex uplink/downlink configuration. The sidelink time slot configuration method according to claim 1, wherein the sidelink parameter set is (pre)configured for the sidelink operation. The side link time slot configuration method according to claim 4, 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 as claimed in claim 1, wherein the only includes The number of time slots for uplink symbols is obtained through the TDD uplink/downlink configuration. The method for configuring side link time slots according to claim 1, 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, comprising: 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 through a side link in the wireless network link (pre)configuration for side link operation, wherein the user equipment is configured with a Uu link connected to a base station in the wireless network; a synchronization module for receiving a time division dual a dual uplink/downlink configuration; a sidelink time slot module for use based on said sidelink (pre)configuration, said time division duplex uplink/downlink configuration and a reference parameter determining the side link time slot configuration of the side link; and a side link control module, configured to perform side link transceiving through the side link based on the determined side link time slot configuration , wherein the side link slot configuration is used to configure the number and/or position of side link slots that only include side link symbols, and the number of side link slots that only include side link symbols is configured by including only The number of time slots of uplink symbols, the reference parameter set and one side link parameter set are obtained.