CN113573410A

CN113573410A - Side link time slot configuration method and user equipment

Info

Publication number: CN113573410A
Application number: CN202110360115.1A
Authority: CN
Inventors: 陈滔
Original assignee: MediaTek Singapore Pte Ltd
Current assignee: MediaTek Singapore Pte Ltd
Priority date: 2020-04-10
Filing date: 2021-04-02
Publication date: 2021-10-29
Anticipated expiration: 2041-04-02
Also published as: CN113573410B; WO2021203411A1

Abstract

The embodiment of the invention provides a side link time slot configuration method and user equipment. One embodiment of the method for configuring a sidelink timeslot includes: obtaining, by a user equipment in a wireless network, a sidelink (pre) configuration over a sidelink for sidelink operation, wherein the user equipment is configured with a Uu link connected with a base station in the wireless network; receiving a time division duplex uplink/downlink configuration; determining a sidelink timeslot configuration for the sidelink based on the sidelink (pre) configuration, a time division duplex uplink/downlink configuration, and a set of reference parameters; and performing side link transceiving through the side link based on the determined side link timeslot configuration. By using the invention, the side link transceiving can be better executed.

Description

Side link time slot configuration method and user equipment

Technical Field

The present invention relates to wireless communication, and more particularly, to timeslot configuration and resource allocation for Sidelink (SL).

Background

The 5G radio access technology will become a key component of modern access networks, which will address the high traffic growth and the increasing demand for high bandwidth connections. In 3GPP New Radio (NR), SL is continuously evolving. With the new functionality supported, the SL provides low latency, high reliability, and high throughput for device-to-device communications. SL measurements are supported in vehicle to evolution (V2X). Unicast, multicast and broadcast may all support V2X SL communications. To support efficient SL communication, SL resource allocation needs to consider different configuration requirements and scenarios for the SL path and the Uu link path. The resource allocation includes channel state information reference signal (CSI-RS) resource allocation and reporting, and bandwidth part (BWP) configuration for SL communication. In addition, the slot configuration of SL has a common property with the existing Uu link. Sharing configuration information between SL and Uu links may improve system efficiency. However, SL may be configured with different parameter sets (numerology), and slot configuration requires additional steps.

Therefore, SL slot configuration and sidelink resource allocation need improvement and enhancement.

Disclosure of Invention

An embodiment of the present invention provides a method for configuring a sidelink timeslot, including: obtaining, by a user equipment in a wireless network, a sidelink (pre) configuration over a sidelink for sidelink operation, wherein the user equipment is configured with a Uu link connected with a base station in the wireless network; receiving a time division duplex uplink/downlink configuration; determining a sidelink timeslot configuration for the sidelink based on the sidelink (pre) configuration, a time division duplex uplink/downlink configuration, and a set of reference parameters; and performing side link transceiving through the side link based on the determined side link timeslot configuration.

Another embodiment of the present invention provides a user equipment, including: a transceiver to transmit and receive radio frequency signals in a wireless network; a sidelink configuration module to obtain a sidelink (pre) configuration for sidelink operation over a sidelink in a wireless network, wherein the user equipment is configured with a Uu link to which a base station in the wireless network is connected; a synchronization module to receive a time division duplex uplink/downlink configuration; a sidelink timeslot module to determine a sidelink timeslot configuration for the sidelink based on the sidelink (pre) configuration, a time division duplex uplink/downlink configuration, and a set of reference parameters; and a sidelink control module for sidelink transceiving through the sidelink based on the determined sidelink timeslot configuration.

Another embodiment of the present invention provides a storage medium storing a program, which when executed, causes a ue to perform the timeslot configuration method proposed in the present invention.

By using the invention, the side link transceiving can be better executed.

Drawings

The drawings illustrate embodiments of the invention, in which like numerals refer to like elements.

Fig. 1 is a system diagram of an exemplary wireless network (system) for sidelink timeslot configuration and resource allocation in accordance with an embodiment of the present invention.

Fig. 2 is a schematic diagram of an exemplary NR wireless system with a centralized upper layer of the NR radio interface stack in accordance with an embodiment of the present invention.

Fig. 3 is an exemplary top-level functional diagram for sidelink timeslot configuration and resource allocation in accordance with an embodiment of the present invention.

Fig. 4 is an exemplary diagram of a side link slot configuration including an NR frame and slot structure according to an embodiment of the present invention.

Fig. 5 is an exemplary diagram of a sidelink timeslot configuration based on a reference parameter set according to an embodiment of the present invention.

Fig. 6 is an exemplary diagram for side link CSI-RS resource allocation according to an embodiment of the invention.

Fig. 7 is an exemplary diagram of a sidelink BWP configuration and allocation in accordance with an embodiment of the present invention.

Fig. 8 is an exemplary flowchart of a sidelink timeslot configuration process based on a reference parameter set according to an embodiment of the present invention.

Detailed Description

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

In NR wireless networks, SL is enabled. The NR V2X supports transmission of CSI-RS. The CSI-RS is transmitted in a Physical Sidelink Shared Channel (PSSCH) and only transmitted when SL CQI/RI reporting is enabled by higher layer (higher layer) signaling. SL CQI/RI reports from RX UEs are enabled by Sidelink Control Information (SCI) at the physical layer to assist TX UEs in link adaptation. The conventional CSI reporting 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 LTE networks, the set of parameters in NR networks support different types of SCS. The slot configuration for SL communication needs to take into account the parameter set difference between the SL and Uu links.

Fig. 1 is a system diagram of an exemplary wireless network (system) for sidelink timeslot configuration and resource allocation in accordance with an embodiment of the present invention. The wireless system 100 includes one or more fixed infrastructure elements that form a network distributed over a geographic area. The infrastructure elements may also be referred to as access points, access terminals, base stations, node bs, evolved node bs (eNode-bs), next generation node bs (gnbs), or other terminology used in the art. The network may be a homogeneous network or a heterogeneous network, and may be deployed using the same or different frequencies. The gbb 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 Equipments (UEs) 111, 112, 113, 114, 115, 116 and 117. An exemplary mobile device in wireless network 100 has SL capability. A mobile device may establish one or more connections with one or more base stations, such as the gNB 101. UE 111 has an access link with the gNB101, including an Uplink (UL) and a Downlink (DL). UEs 112 also served by the gNB101 may also establish UL and DL with the gNB 101. UE 111 establishes a SL with UE 112. UE 111 and UE 112 are both in-coverage devices. The mobile devices on the vehicle (e.g.,

mobile devices

113, 114, and 115) also have SL capability.

Mobile devices

113 and 114 are covered by the gNB 101. The in-coverage device 113 establishes a SL with the in-coverage device 114. The mobile device 115 on the vehicle is an out-of-coverage device. The in-coverage mobile devices 114 establish a SL with the out-of-coverage devices 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 another mobile device or devices over the sidelink.

Fig. 1 further shows a simplified block diagram of a base station and mobile devices/UEs for sidelink timeslot configuration and resource allocation. The gbb 101 has an antenna 156, which transmits and receives radio signals. RF transceiver circuitry 153 coupled to the antenna receives RF signals from antenna 156, converts the RF signals to baseband signals, and sends the baseband signals to processor 152. The RF transceiver 153 also converts a baseband signal received from the processor 152 into an RF signal and transmits to the antenna 156. Processor 152 processes the received baseband signals and invokes different functional blocks to perform functional features in the gNB 101. Memory 151 stores program instructions and data 154 to control the operation of the gNB 101. The gNB101 also includes a set of control modules 155 for performing functional tasks to communicate with mobile stations.

UE 111 has an antenna 165 for transmitting and receiving radio signals. The RF transceiver circuit 163, which is 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). A first RF module for High Frequency (HF) transmission and reception; the other RF module is different from the HF transceiver for transmission and reception of different frequency bands. The RF transceiver 163 also converts a baseband signal received from the processor 162 into an RF signal and transmits to the antenna 165. Processor 162 processes the received baseband signals and invokes different functional modules to perform functional features in UE 111. Memory 161 stores program instructions and data 164 to control the operation of UE 111. Antenna 165 sends uplink transmissions to antenna 156 of gNB101 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 blocks may be implemented by circuitry, software, firmware, or a combination thereof. The SL configuration module 191 uses the SL in the wireless network to obtain SL (pre) configuration for SL operation, where the UE is configured with a Uu link to connect with a 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 a SL slot configuration for the SL based on the SL (pre) configuration, the TDD UL/DL configuration, and the set of reference parameters. The SL control module 194 performs SL transceiving through the 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 the NR radio interface stack in accordance with an embodiment of the present invention. Different protocol partitioning options are possible between the upper layer of the Central Unit (CU)/gNB node and the lower layer of the Distributed Unit (DU)/gNB node. The functional division between the central unit and the lower layers of the gbb may depend on the transport layer. Since higher protocol layers have lower performance requirements on the transport layer in terms of bandwidth, delay, synchronization and jitter, low performance transmission between the central unit and the lower layers of the gbb may enable the high protocol layers of the NR radio stack to be supported in the central unit. In one embodiment, Service Data Adaptation Protocol (SDAP) and Packet Data Convergence Protocol (PDCP) layers are located in a central unit, and Radio Link Control (RLC), Medium Access Control (MAC), and Physical (PHY) layers are located in a distributed unit. A core unit (core unit)201 is connected to a central unit 211 having a gNB upper layer 252. In an embodiment, the gbb upper layers 252 include a PDCP layer and an optional SDAP layer. Central unit 211 is connected to distributed

units

221, 222, and 223, where distributed

units

221, 222, and 223 correspond to

cells

231, 232, and 233, respectively. Distributed

units

221, 222, and 223 include a gbb lower layer 251. In an embodiment, the gbb lower layer 251 includes PHY, MAC, and RLC layers. In another embodiment 260, each gNB has a protocol stack 261 that includes SDAP, PDCP, RLC, MAC, and PHY layers.

Fig. 3 is an exemplary top-level functional diagram for sidelink timeslot configuration and resource allocation in accordance with an embodiment of the present invention. UE 301 and UE 302 are connected to the gNB 303 in the NR network via Uu links 311 and 312, respectively. In an embodiment, the sidelink 313 is configured for both the UE 301 and the UE 302.

In an embodiment 321, the SL slot configuration is based on a reference parameter set. The UE obtains a sidelink configuration and a TDD downlink/uplink configuration. The SL slot configuration is derived based on the Uu link parameter set and the sidelink 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 granularity (granularity).

In another embodiment 322, CSI-RS resource allocation is performed for sidelink communications. For CSI-RS transmission for CSI measurement, rate matching may be performed based on the presence of an SCI field (e.g., a second stage SCI) for the CSI request and the configuration of CSI-RS resources. Specifically, the presence or absence of the CSI request field may determine whether to perform rate matching, and the configuration of the CSI-RS resources may be used to determine how to perform rate matching. In addition, the CSI-RS resource may be mapped onto a physical sidelink shared channel (pscch) resource of a Transport Block (TB). In other words, it cannot be mapped to the PSSCH transmitting the second-stage SCI and/or the PSSCH carrying the first-stage SCI. In other embodiments, it may be punctured (punctured) to reduce complexity. The assumed CSI table should be indicated in the SCI (e.g., second stage SCI) and/or higher layer signaling to enable the UE to derive the appropriate CSI index based on CSI measurements.

In yet another embodiment 323, resource pool configuration and allocation may be performed for SL communications. For resource pool allocation, special subchannels may be introduced to accommodate resources (or resource blocks, RBs) that are multiples of the non-subchannel size or smaller than the subchannel size. For such special sub-channels, it may be limited to PSCCH transmission or transmission of FDM multiplexed pschs and Physical Sidelink Control Channels (PSCCHs). In an embodiment, the PSCCH may span all symbols in the SL slot except for GP symbols and Physical Sidelink Feedback Channel (PSFCH) symbols, if the PSCCH is available. Multiple resource pools may be configured with different subchannel sizes, and the UE may select the resource pools randomly or based on a rule (e.g., priority of the resource pools).

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

Fig. 4 is an exemplary diagram of a side link slot configuration including an NR frame and slot structure according to an embodiment of the present invention. The exemplary NR frame structure 410 shows a frame 411, a subframe 412 and a slot 413. The 10ms frame 411 includes 10 subframes, each having 1 ms. Subframe 412 includes one or more time slots, depending on the subcarrier spacing in the parameter set. Each slot contains a plurality of symbols. Diagram 420 shows exemplary parameters in the NR parameter set. The parameter set is defined by SCS and Cyclic Prefix (CP) overhead. NR networks support multiple SCS. Scaling the base SCS by integer may result in multiple SCS's. The diagram 420 shows SCS parameters 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, …, each integer corresponding to one SCS. Each NR subframe has a length of 1ms and the number of slots per subframe is SCS based, equal to 2 μ. Time slot duration of 1/2^μms. In other embodiments, the NR network supports more SCS, such as 240 kHz. Graph 420 shows exemplary parameters.

In NR networks, multiple SCS's are supported for slot configuration. In current systems, timeslots can be classified as downlink, uplink, hybrid UL and DL transmissions. In TDD, time slots may be configured for mixed use of UL and DL. NR TDD uses flexible slot configuration. The slot format configuration in the NR can be static, semi-static and dynamic. Static and semi-static slot configurations may be supported via signaling messages, such as Radio Resource Control (RRC) messages. Dynamic configuration for time slot configuration uses Physical Downlink Control Channel (PDCCH) downlink controlInformation (DCI). The slot configuration may be implemented through an RRC message, such as tdd-UL-DL-configuration common. The slot configuration may configure only one pattern, or may configure two patterns. Diagram 430 shows a configuration with only pattern 1 and parameter set parameters of μ_refExemplary time slots. A single UL/DL pattern is periodically transmitted in DL-UL-TransmissionPeriodicity 431. The total number of slots in 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 within the period 431. The number of DL symbols in the DL/flexible (D/F) slot 434 and the number of UL symbols in the flexible/UL (F/D) slot 435 may also be configured.

With the configuration parameters, the UL time slot associated with the configured pattern may 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 the Uu link and the sidelink are different, the number of sidelink slots is also based on the parameter set difference between the SL and Uu links. The number of UL slots is also based on parameter set differences. Diagram 440 illustrates an exemplary scenario in which a sidelink slot configuration is derived based on parameter set differences between the Uu link/interface and the sidelink. Referring to the exemplary example of fig. 430, the sidelink timeslot configuration uses TDD UL/DL configuration information to derive the number of sidelink timeslots. In one embodiment, assume the Uu interface μ _ref2. The sidelink configuration 442 has the same number of sidelink slots as the uplink slots. When μ ═ 1, the sidelink configuration 443 is configured such that the number of sidelink slots is half of the uplink slots. Similarly, when μ is 3, the sidelink configuration 441 is configured such that the number of sidelink slots is twice as many as the uplink slots. Furthermore, as shown at 444, when the sidelink and Uu link have different parameter sets, the parameter set difference may result in additional sidelink slots being generated 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 exemplary diagram of a sidelink timeslot configuration based on a reference parameter set according to an embodiment of the present invention. UE 501 and UE 502 are connected to the gNB 503 in the NR network through

Uu links

511 and 512, respectively. UE 501 and UE 502 are configured with a sidelink configuration for sidelink 513. The UE determines the sidelink slot configuration 520 based on the reference pattern and the reference parameter set for the slot configuration. SL slot configuration 520 configures the number and/or location of SL slots that include 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 TDD UL/DL information carried in the S-SSB for determining available SL timeslots, the single-period pattern and the bi-period pattern associated with the UL timeslot for each period may be indicated in the S-SSB acquired from the Uu interface (e.g., SIB message). The SL periodic configuration 521 including the periodic configuration and the pattern indication may be obtained through TDD UL/DL configuration 552. In an embodiment, TDD UL/DL configuration 552 is carried by SIB messages.

The bits in the S-SSB are limited and therefore cannot carry all combinations. To save bits, the same indication can be used with different granularities for different values of n for the same pattern in each of the two cycles, i.e., { P1 ═ n, P2 ═ n }. For example, for a bi-periodic pattern P1, P2 ═ 5, consecutive SL or UL slots of the

pattern

5, 5 are indicated by some bits. For other patterns with the same periodicity for P1 and P2, i.e., {2, 2}, {2.5, 2.5}, and {10, 10}, the difference of the corresponding information and parameter set can be derived with reference to the SL or UL slot indication for pattern {5, 5 }. As shown in fig. 430 and 440, when the reference pattern as in fig. 430 is configured, the UE may derive the SL or UL slot configuration based on the reference pattern configuration in fig. 430. The configuration in diagram 440 applies to both the side link and uplink slot configurations, with parameter sets and reference parameter sets μ_refDifferent.

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

Fig. 6 is an exemplary diagram for side link CSI-RS resource allocation according to an embodiment of the 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 psch used for TB transmission. In another embodiment 612, punctured resources are used. For CSI-RS transmission for CSI measurement, rate matching may be performed based on the presence of an SCI field (e.g., a second stage SCI) for the CSI request and the configuration of CSI-RS resources. In addition, in an embodiment, the CSI-RS resources are mapped on the pscch resources on which the TBs are transmitted. The CSI-RS resources cannot be mapped to the psch that sends the second-stage SCI and/or the psch that carries the first-stage SCI because the UE needs deceleration rate matching 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 vary, the exact CSI-RS resource location may also vary, thereby avoiding collision between the second-stage SCI and the first-stage SCI resources. The CSI-RS resource can only be mapped onto symbols of the psch for TB transmission (i.e., without any first-stage SCI and second-stage SCI transmission). In an embodiment, the exact CSI-RS resource location may be implicitly derived from the time/frequency resources of the first-stage SCI and/or the second-stage SCI, or may be derived from the configuration. In another embodiment, the SL CSI-RS resources may 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, the SL CSI reporting resource is configured in resource pool/BWP. In another embodiment 622, the SL CSI reporting resources are indicated in the SCI field. For SL CSI reporting, a hypothetical SL CSI table (e.g., 64QAM, 256QAM, or Ultra Reliable Low Latency Communication (URLLC) table) may be configured for each resource pool/BWP and/or may be exchanged between UEs through PC 5-RRC. In other embodiments, the hypothetical SL CSI table may be indicated in a SCI field (e.g., a second-stage SCI) from a set of (pre-) configured CSI tables. In this manner, dynamic switching between SL MCS tables may be performed based on SL CSI reports derived from different assumed SL CSI tables corresponding to different SL MCS tables. In an embodiment, SCI and/or higher layer signaling indicate only one hypothetical CSI table, with which the reported CSI is implicitly associated. In another embodiment, multiple hypothetical CSI tables are indicated. The UE may report CSI associated with the assumed CSI table index, i.e. different CSI reports are associated with different CSI tables. In the case where multiple CSI resources are configured, the UE may report CSI results associated with corresponding CSI-RS resource indices.

Fig. 7 is an exemplary diagram of a sidelink BWP configuration and allocation in accordance with an embodiment of the present invention. In an NR network, a subchannel is configured with N RBs. SL BWP configuration 710 configures SL BWP by the number of RBs rather than a multiple of the subchannel size.

In an embodiment 711, one or more resource pools may be configured to utilize minimized fragmented resources (i.e., not a multiple of a subchannel size or less than a subchannel size) to fully utilize all resources. For example, multiple resource pools may be configured with different subchannel sizes, such that fragmentation resources are very limited. The UE may select the resource pool randomly or based on a rule, such as a priority of the resource pool.

In another embodiment 712, the segmented resources may be configured to employ separate resource pools for pschs and/or PSCCHs and/or PSFCH transmissions. Any number of PRBs may be configured for the resource pool.

In yet another embodiment 713, at most (or at least) one resource pool in a SL BWP may be configured with RBs that are not multiples of the subchannel size. For example, multiple resource pools may be configured for SL BWP, where the RBs for which at most (or at least) one resource pool is configured are not multiples of the subchannel size. The transmission/reception of the pschs will be limited to those resources that are multiples of the subchannel size. The smallest RB index among the smallest subchannel indexes of the resource pool is the smallest RB index of the resource pool. The remaining RBs in the resource pool (i.e., RBs smaller than the subchannel size) may be designated as special subchannels that may be used for PSCCH transmission but not PSCCH transmission, i.e., as a supplemental subchannel for PSCCH transmission. Such special sub-channels may carry the PSCCH and PSCCH by FDM multiplexing. In this case, the PSCCH may be transmitted on all symbols in the SL slot (if available) except for the GP symbol and the PSFCH symbol.

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

In one embodiment, a storage medium (e.g., a computer-readable storage medium) stores a program that, when executed, causes a UE to perform embodiments of the present invention.

Although the present invention has been described in connection with the specified embodiments for the purpose of illustration, the present invention is not limited thereto. Accordingly, various modifications, adaptations, and combinations of the various features of the described embodiments can be practiced without departing from the scope of the invention as set forth in the claims.

Claims

1. A method for configuring a sidelink timeslot includes:

obtaining, by a user equipment in a wireless network, a sidelink (pre) configuration over a sidelink for sidelink operation, wherein the user equipment is configured with a Uu link connected with a base station in the wireless network;

receiving a time division duplex uplink/downlink configuration;

determining a sidelink timeslot configuration for the sidelink based on the sidelink (pre) configuration, a time division duplex uplink/downlink configuration, and a set of reference parameters; and

performing side link transceiving through the side link based on the determined side link timeslot configuration.

2. The sidelink timeslot configuration method according to claim 1, wherein the sidelink timeslot configuration is used to configure the number and/or position of sidelink timeslots including only sidelink symbols.

3. The sidelink timeslot configuration method of claim 2, wherein the sidelink timeslot number that only includes sidelink symbols is obtained by a timeslot number that only includes uplink symbols, a reference parameter set, and a sidelink parameter set.

4. The method of claim 3, wherein the reference parameter set is a Uu link parameter set, and wherein the Uu link parameter set and the sidelink parameter set are (pre) configured with the same or different parameter sets.

5. The method of claim 3, wherein the reference parameter set relates to the TDD UL/DL configuration.

6. The sidelink timeslot configuration method of claim 3, wherein the sidelink parameter set is (pre-) configured for the sidelink operation.

7. The sidelink timeslot configuration method of claim 6, wherein the sidelink parameter set is (pre-) configured by receiving a signaling message, wherein the signaling message is a dedicated radio resource control message or a system information block message.

8. The method of claim 3, wherein the number of time slots comprising only uplink symbols is obtained by the TDD UL/DL configuration.

9. The sidelink timeslot configuration method of claim 2, wherein the number of sidelink timeslots including only sidelink symbols is carried in a sidelink synchronization signal block.

10. The method of claim 1, wherein the TDD uplink/downlink configuration is carried by a system information block.

11. A user equipment, comprising:

a transceiver to transmit and receive radio frequency signals in a wireless network;

a sidelink configuration module to obtain a sidelink (pre) configuration for sidelink operation over a sidelink in a wireless network, wherein the user equipment is configured with a Uu link to which a base station in the wireless network is connected;

a synchronization module to receive a time division duplex uplink/downlink configuration;

a sidelink timeslot module to determine a sidelink timeslot configuration for the sidelink based on the sidelink (pre) configuration, a time division duplex uplink/downlink configuration, and a set of reference parameters; and

a side link control module for performing side link transceiving through the side link based on the determined side link timeslot configuration.

12. The UE of claim 11, wherein the sidelink Slot is configured to configure the number and/or location of sidelink slots comprising sidelink symbols only.

13. The UE of claim 12, wherein the number of sidelink timeslots including only sidelink symbols is derived from a number of timeslots including only uplink symbols, a reference parameter set, and a sidelink parameter set.

14. The UE of claim 13, wherein the reference parameter set is a Uu link parameter set, and wherein the Uu link parameter set and the side link parameter set are (pre) configured with the same or different parameter sets.

15. The UE of claim 13, wherein the set of reference parameters relates to the TDD UL/DL configuration.

16. The user equipment according to claim 13, wherein the sidelink parameter set is (pre-) configured for the sidelink operation.

17. The UE of claim 16, wherein the set of sidelink parameters is (pre-) configured by receiving a signaling message, wherein the signaling message is a dedicated radio resource control (R C) message or a system information block (SI) message.

18. The UE of claim 13, wherein the number of timeslots including only uplink symbols is obtained via the TDD UL/DL configuration.

19. The UE of claim 12, wherein the number of sidelink timeslots including sidelink symbols only is carried in a sidelink synchronization signal block.

20. The user equipment of claim 11, wherein the time division duplex uplink/downlink configuration is carried by a system information block.

21. A storage medium storing a program that, when executed, causes a user equipment to perform the steps of the sidelink timeslot configuration method as set forth in any one of claims 1-10.