CN117676838A

CN117676838A - Unlicensed spectrum resource determination method and device

Info

Publication number: CN117676838A
Application number: CN202210961934.6A
Authority: CN
Inventors: 易凤; 苏宏家; 卢磊
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-08-11
Filing date: 2022-08-11
Publication date: 2024-03-08
Also published as: WO2024032193A1

Abstract

The application provides a method and a device for determining resources of unlicensed spectrum, which relate to the technical field of communication and are used for solving the problems that a receiving end cannot acquire the resource occupation information of transmission data and the communication efficiency is low because the two parties of communication are not aware of the resource block information of the unlicensed spectrum of the other party. The method comprises the following steps: a first terminal accesses a channel, and determines a first staggered resource block set, wherein the first staggered resource block set comprises M resource blocks; and determining N resource blocks from the M resource blocks, wherein the N resource blocks are used for transmitting the first side information to the second terminal. Wherein N and M are positive integers, and the value of N is smaller than that of M.

Description

Unlicensed spectrum resource determination method and device

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a method and an apparatus for determining resources of an unlicensed spectrum.

Background

In a wireless communication system, communication between User Equipments (UEs) is called Sidelink (SL). In NR, according to the difference of the frequency bands used, the frequency bands may be divided into licensed frequency bands and unlicensed frequency bands, where the UE may use spectrum resources in the licensed frequency bands based on scheduling of the network device, and for the unlicensed frequency bands, the UE may use spectrum resources in a contention manner. For example, the UE may obtain a period of Channel Occupation Time (COT) of the partial spectrum Resource in the unlicensed band through a listen before talk (listen before talk, LBT) mechanism, such as determining a set of available spectrum Resource Blocks (RBs).

While certain legal requirements, such as requirements for occupying a channel bandwidth (Occupied Channel Bandwidth, OCB), are met for use in certain regions, for example, a channel of 20MHz is accessed in a 5GHz band, and at least a minimum OCB is required to be met to occupy the channel, for example, the minimum OCB is 80% of the 20MHz bandwidth, that is, at least 16MHz bandwidth is required to be occupied to preempt the 20MHz channel. Based on this, a concept of interleaving resource blocks (interlaced resource block, interleaved RBs) is proposed, e.g. partitioning a 20MHz bandwidth resource into a plurality of interleaved RBs, each RB set consisting of a plurality of scattered interleaved RBs.

However, the RB sets configured by different network devices may be different, for example, the number or distribution of the staggered RBs in the RB sets may be different, when the two parties of the communication are not aware of the RB set information of the other party, for example, in a scenario without network coverage or without network intervention, if the transmitting end sends data according to the staggered RBs of the transmitting end, the receiving end does not know the number or distribution of the staggered RBs of the transmitting end, so that multiple blind detection is required to accurately obtain the resource occupation information of the transmitting end, and the communication efficiency is low.

Disclosure of Invention

The application provides a method and a device for determining resources of unlicensed spectrum, which solve the problems that in the prior art, a receiving end cannot acquire the resource occupation information of transmission data and the communication efficiency is lower because the two communication parties are not aware of the resource block information of the unlicensed spectrum of the other party.

In order to achieve the above purpose, the present application adopts the following technical scheme:

in a first aspect, a method for determining resources of an unlicensed spectrum is provided, the method comprising: a first terminal accesses a channel, and determines a first staggered resource block set, wherein the first staggered resource block set comprises M resource blocks; determining N resource blocks, wherein the N resource blocks belong to the M resource blocks, N and M are positive integers, and the value of N is smaller than that of M; and sending the first side information to the second terminal on the N resource blocks.

According to the technical scheme, the transmitting end and the receiving end can adopt N RBs with fixed numbers and fixed positions to transmit and receive information, so that when the RB sets respectively configured by the receiving end and the transmitting end are different, side line information can be accurately received, and the side line transmission communication efficiency of the unlicensed spectrum is improved.

In one embodiment, the N resource blocks are the N resource blocks with the smallest or largest index among the M resource blocks, or include N resource blocks located in the middle of the M resource blocks. That is, the receiving end and the transmitting end may configure the same unlicensed spectrum resource selection manner, for example, the receiving end and the transmitting end are configured to transmit the first side information in N RBs with the smallest RB indexes in respective staggered resource block sets, so that the receiving end can successfully receive the information without multiple blind detection, and the communication efficiency is improved.

In one embodiment, N is preconfigured, or configured by a network device, or predefined, for the first terminal.

In one embodiment, N may be configured to be 10.

In one embodiment, the first side line information includes side line control information and/or side line data information.

In one embodiment, the first side-line information includes first side-line synchronization information. The receiving end and the transmitting end can continuously transmit side row information through N RBs in the staggered resource block set. Or the transmitting end and the receiving end can also adopt fixed N RBs to send and receive information only when transmitting for the first time, then can carry out signaling interaction through side uplink synchronous information, inform the opposite side of respective RB set information or protection bandwidth information and the like, and negotiate the time-frequency resource position of the subsequent transmitting information, thereby improving the utilization rate of frequency spectrum resources and further improving the communication efficiency.

In one embodiment, the method further comprises: the first terminal receives first indication information from the second terminal; the first indication information is used for indicating a first protection bandwidth, the first protection bandwidth is used for determining L resource blocks, and/or the first indication information indicates L resource blocks, wherein L is a positive integer. The first indication information can be used for the second terminal to inform the first terminal of the self resource block set information, so that the first terminal can determine the resources of the subsequent transmitting side line data according to the RB number of the RB set of the receiving terminal, and the resource utilization rate is improved.

In one embodiment, the first terminal receives the first indication information on N resource blocks.

In one embodiment, the first indication information is carried in a physical side uplink broadcast channel PSBCH, or in radio resource control RRC signaling, or in a medium access control MAC control element CE, or in side uplink control information SCI.

In one embodiment, the method further comprises: the first terminal sends second indication information to the second terminal on the N resource blocks, wherein the second indication information is used for indicating a second protection bandwidth, the second protection bandwidth is used for determining M resource blocks, and/or the second indication information is used for indicating the M resource blocks. The second indication information can be used for the first terminal to inform the second terminal of the self resource block set information, so that the second terminal can determine the resources of the subsequent receiving side row data according to the RB number of the RB set of the sending terminal, and the resource utilization rate is improved.

In one embodiment, the second indication information is carried on the first side-link synchronization information, or on the physical side-link broadcast channel PSBCH, or on the radio resource control RRC signaling, or on the medium access control MAC control element CE, or on the side-link control information SCI.

In one embodiment, the first indication information or the second indication information is carried in X bits, where the value of X is a positive integer, and the X is related to at least one of the number of configured protection bandwidths, the number of resource sets of the resource pool, and the subcarrier spacing. The first indication information or the second indication information indicates different information, the number of bits carried is different, and the indication mode is flexible.

In one embodiment, the method further comprises: mode 1: and the first terminal determines to send second sidestream information to the second terminal on Y resource blocks according to the first indication information, wherein the Y value is the smaller of the M value and the L value, or the Y resource blocks are intersections of the M resource blocks and the L resource blocks, and the second sidestream information comprises sidestream data. The receiving end and the sending end can determine to adopt the RB set with smaller RB number in the interval as the transmission resource according to the configuration mode, so that the receiving end can successfully receive the sidestream data, the blind detection times of the receiving end are reduced, and the resource utilization rate and the communication efficiency are improved.

In one embodiment, the method further comprises: mode 2: and the first terminal sends second sidestream information to the second terminal on the M resource blocks, wherein the second sidestream information comprises sidestream data. The receiving end and the sending end can send according to the configured RB set, and the receiving end receives according to the configured RB set, so that the receiving end can successfully receive the side line data, blind detection times of the receiving end are reduced, and resource utilization rate and communication efficiency are improved.

In one embodiment, the method further comprises: receiving third indication information from the network device; or, sending third indication information to the second terminal, where the third indication information is used to indicate that the resource allocation mode corresponding to sending the second sidestream information is mode 1 or mode 2.

In a second aspect, a method for determining resources of an unlicensed spectrum is provided, the method comprising: the second terminal determines a second staggered resource block set, wherein the second staggered resource block set comprises L resource blocks; determining N resource blocks, wherein the N resource blocks belong to the L resource blocks, N and L are positive integers, and the value of N is smaller than that of L; and receiving first side line information from the first terminal on the N resource blocks.

In one embodiment, the N resource blocks are the N resource blocks with the smallest or largest index among the L resource blocks, or include the N resource blocks located in the middle of the L resource blocks.

In one embodiment, N is preconfigured, or configured by a network device, or predefined, for the second terminal.

In one embodiment, N may be configured to be 10.

In one embodiment, the first side-line information includes first side-line synchronization information.

In one embodiment, the method further comprises: the second terminal sends first indication information to the first terminal, wherein the first indication information is used for indicating a first protection bandwidth, the first protection bandwidth is used for determining L resource blocks, and/or the first indication information indicates L resource blocks, and L is a positive integer.

In one embodiment, the second terminal sends the first indication information on N resource blocks.

In one embodiment, the method further comprises: the second terminal receives second indication information from the first terminal on the N resource blocks, wherein the second indication information is used for indicating a second protection bandwidth, the second protection bandwidth is used for determining M resource blocks, and/or the second indication information is used for indicating the M resource blocks.

In one embodiment, the first indication information or the second indication information is carried in X bits, where the value of X is a positive integer, and the X is related to at least one of a configured protection bandwidth, a number of resource sets of a resource pool, and a subcarrier interval.

In one embodiment, the method further comprises: mode 1: and the second terminal determines to receive second sidestream information from the first terminal on Y resource blocks according to the second indication information, wherein the Y value is the smaller of the M value and the L value, or the Y resource blocks are intersections of the M resource blocks and the L resource blocks, and the second sidestream information comprises sidestream data.

In one embodiment, the method further comprises: mode 2: and the second terminal determines to receive second sidestream information from the first terminal on the M resource blocks according to the second indication information, wherein the second sidestream information comprises sidestream data.

In one embodiment, the method further comprises: receiving third indication information from the network device; or, receiving third indication information from the first terminal, where the third indication information is used to indicate that a resource allocation mode corresponding to the second sidestream information is mode 1 or mode 2.

In a third aspect, there is provided a communication apparatus comprising: the processing module is used for accessing a channel and determining a first staggered resource block set, wherein the first staggered resource block set comprises M resource blocks; n resource blocks are determined, wherein the N resource blocks belong to the M resource blocks, N and M are positive integers, and the value of N is smaller than that of M. And the receiving and transmitting module is used for transmitting the first side information to the second terminal on the N resource blocks.

In one embodiment, the N resource blocks are the N resource blocks with the smallest or largest index among the M resource blocks, or include N resource blocks located in the middle of the M resource blocks.

In one embodiment, N is preconfigured for the communication device or configured by a network device or predefined.

In one embodiment, N may be configured to be 10.

In one embodiment, the transceiver module is further configured to receive first indication information from the second terminal; the first indication information is used for indicating a first protection bandwidth, the first protection bandwidth is used for determining L resource blocks, and/or the first indication information indicates L resource blocks, wherein L is a positive integer.

In one embodiment, the transceiver module is specifically configured to receive the first indication information on N resource blocks.

In an embodiment, the transceiver module is further configured to send second indication information to the second terminal on the N resource blocks, where the second indication information is used to indicate a second protection bandwidth, where the second protection bandwidth is used to determine M resource blocks, and/or where the second indication information is used to indicate the M resource blocks.

In one embodiment, the transceiver module is further configured to perform mode 1: and sending second sidestream information to the second terminal on Y resource blocks according to the first indication information, wherein the value of Y is the smaller of the M value and the L value, or the Y resource blocks are intersections of the M resource blocks and the L resource blocks, and the second sidestream information comprises sidestream data.

In one embodiment, the transceiver module is further configured to perform mode 2: and sending second sidestream information to the second terminal on the M resource blocks, wherein the second sidestream information comprises sidestream data.

In one embodiment, the transceiver module is further configured to receive third indication information from the network device; or, sending third indication information to the second terminal, where the third indication information is used to indicate that the resource allocation mode corresponding to sending the second sidestream information is mode 1 or mode 2.

In a fourth aspect, there is provided a communication apparatus comprising: a processing module, configured to determine a second set of interleaved resource blocks, where the second set of interleaved resource blocks includes L resource blocks; and determining N resource blocks, wherein the N resource blocks belong to the L resource blocks, N and L are positive integers, and the value of N is smaller than that of L. And the receiving and transmitting module is used for receiving the first side information from the first terminal on the N resource blocks.

In one embodiment, N may be configured to be 10.

In an embodiment, the transceiver module is further configured to send first indication information to the first terminal, where the first indication information is used to indicate a first protection bandwidth, and the first protection bandwidth is used to determine L resource blocks, and/or the first indication information indicates L resource blocks, where L is a positive integer.

In one embodiment, the transceiver module is specifically configured to send the first indication information on N resource blocks.

In one embodiment, the transceiver module is further configured to receive second indication information from the first terminal on the N resource blocks, where the second indication information is used to indicate a second protection bandwidth, where the second protection bandwidth is used to determine M resource blocks, and/or where the second indication information is used to indicate the M resource blocks.

In one embodiment, the transceiver module is further configured to perform mode 1: and the second terminal receives second sidestream information from the first terminal on Y resource blocks according to the second indication information, wherein the value of Y is the smaller one of the M value and the L value, or the Y resource blocks are intersections of the M resource blocks and the L resource blocks, and the second sidestream information comprises sidestream data.

In one embodiment, the transceiver module is further configured to: and the second terminal receives second sidestream information from the first terminal on the M resource blocks according to the second indication information, wherein the second sidestream information comprises sidestream data.

In one embodiment, the transceiver module is further configured to receive third indication information from the network device; or, receiving third indication information from the first terminal, where the third indication information is used to indicate that a resource allocation mode corresponding to the second sidestream information is mode 1 or mode 2.

In a fifth aspect, there is provided a terminal device, including: one or more processors and one or more memories; the one or more memories are coupled to the one or more processors, the one or more memories for storing computer program code comprising computer instructions which, when executed by the one or more processors, cause the terminal device to perform the method of any of the first aspects described above.

In a sixth aspect, there is provided a terminal device, including: one or more processors and one or more memories; the one or more memories are coupled with the one or more processors, the one or more memories for storing computer program code comprising computer instructions that, when executed by the one or more processors, cause the terminal device to perform the method of any of the second aspects described above.

In a seventh aspect, there is provided a computer readable storage medium having stored therein computer executable instructions for causing the computer to perform the method of any of the above first aspects when invoked by the computer.

In an eighth aspect, there is provided a computer readable storage medium having stored therein computer executable instructions for causing the computer to perform the method of any of the second aspects above when invoked by the computer.

In a ninth aspect, there is provided a computer program product containing instructions which, when run on a computer, cause the computer to perform the method of any one of the first aspects above.

In a tenth aspect, there is provided a computer program product containing instructions which, when run on a computer, cause the computer to perform the method of any of the second aspects above.

In an eleventh aspect, there is provided a chip coupled to a memory for reading and executing program instructions stored in the memory to implement the method according to any of the first aspects above.

In a twelfth aspect, there is provided a chip coupled to a memory for reading and executing program instructions stored in the memory to implement the method of any of the second aspects above.

A thirteenth aspect provides a communication system comprising a communication device as claimed in any one of the third aspects and a communication device as claimed in any one of the fourth aspects.

It should be appreciated that any of the above-mentioned communication apparatuses, terminal devices, computer-readable storage media, computer program products, chips or communication systems may be used to perform the corresponding methods provided above, and thus, the advantages achieved by the above-mentioned communication apparatuses, terminal devices, computer-readable storage media, computer-readable storage chips or communication systems may refer to the advantages of the corresponding methods provided above, and are not described herein.

Drawings

Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application;

fig. 2 is a schematic diagram of another communication system according to an embodiment of the present application;

fig. 3a, fig. 3b, fig. 4a, fig. 4b, fig. 4c are schematic views of several resource pool configurations provided in embodiments of the present application;

fig. 5 is a schematic structural diagram of a communication device according to an embodiment of the present application;

Fig. 6 is a flowchart of a method for determining resources of unlicensed spectrum according to an embodiment of the present application;

fig. 7 is a schematic diagram of another resource pool configuration provided in an embodiment of the present application;

fig. 8 is a flow chart of a resource determining method according to an embodiment of the present application;

fig. 9 is a flowchart of another method for determining resources of unlicensed spectrum according to an embodiment of the present application;

fig. 10 and fig. 11 are a first flowchart and a second flowchart of a resource determining method according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of another communication device according to an embodiment of the present application.

Detailed Description

The terms "first" and "second" are used below for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present embodiment, unless otherwise specified, the meaning of "plurality" is two or more.

In this application, the terms "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In order to facilitate understanding of the present application, a description will now be made of related art to which embodiments of the present application relate.

The 5G communication technology is the latest generation of cellular mobile communication technology, and is an extension of the fourth generation mobile communication technology, the third generation mobile communication technology and the second generation mobile communication technology. The performance goals of 5G are high data rates, reduced latency, energy savings, reduced cost, increased system capacity, and large-scale device connectivity.

Communications between UEs involved in a communication system are widely known as Sidelink (SL) communications. For example, the side links may include side transmissions in an in-vehicle wireless communication system, or side transmissions in a Device-to-Device (D2D) communication system.

The UE may be a mobile phone (mobile phone), a tablet (Pad), a computer with a wireless transceiving function, a vehicle-mounted terminal, a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal in an industrial control (industrial control), a wireless terminal in a self-driving (self-driving), a wireless terminal in a telemedicine (remote media), a wireless terminal in a smart grid (smart grid), a wireless terminal in a transportation security (transportation safety), a wireless terminal in a smart city (smart city), a wireless terminal in a smart home (smart home), a terminal device in a 5G network or a terminal device in a future evolved public land mobile communication network (public land mobile network, PLMN), a vehicle-mounted Unit (OBU), a vehicle-mounted box (also referred to as a vehicle-mounted T-Box (telematics box)), a Road Side Unit (RSU), a whole vehicle, a smart vehicle, or a device or a chip or the like capable of realizing the foregoing functions. The embodiments of the present application are not limited to application scenarios.

The methods and steps implemented by the UE in the present application may also be implemented by a component (e.g., a chip or a circuit) or the like that may be used for the UE. The UE and a component (e.g., a chip or a circuit) that may be provided in the UE may also be referred to as a terminal device or a terminal in the present application.

In the embodiment of the application, the terminal device or the network device may include a hardware layer, an operating system layer running above the hardware layer, and an application layer running above the operating system layer. The hardware layer includes hardware such as a central processing unit (central processing unit, CPU), a memory management unit (memory management unit, MMU), and a memory (also referred to as a main memory). The operating system may be any one or more computer operating systems that implement business processes through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer comprises applications such as a browser, an address book, word processing software, instant messaging software and the like. Further, the embodiment of the present application is not particularly limited to the specific structure of the execution body of the method provided in the embodiment of the present application, as long as the communication can be performed by the method provided in the embodiment of the present application by running the program recorded with the code of the method provided in the embodiment of the present application, and for example, the execution body of the method provided in the embodiment of the present application may be a terminal device or a network device, or a functional module in the terminal device or the network device that can call the program and execute the program.

Fig. 1 shows an example of a communication system applied to the embodiment of the present application, including a V2X communication system, a D2D communication system, and the like. As shown in fig. 1, the sidestream communication system may include: SL communication between the in-vehicle terminal and the in-vehicle terminal (Vehicle to Vehicle, V2V), SL communication between the in-vehicle terminal and the roadside infrastructure (Vehicle to Infrastructure, V2I), SL communication between the in-vehicle terminal and the pedestrian (Vehicle to Pedestrian, V2P), communication between the terminal devices with energy saving requirements, communication between the pedestrian and the in-vehicle terminal, communication between the pedestrian and the pedestrian, and uplink and downlink communication between the in-vehicle terminal and the network device (Vehicle to Network, V2N), and the like. The D2D communication system includes SL communication between the terminal 1 and the terminal 2.

In addition, the present application may be applied to a system for direct communication between terminals such as V2X, D D, and the like, and is also applicable to communication scenarios with network coverage and without network coverage, as shown in fig. 2, which is not particularly limited in this application.

Illustratively, as shown in FIG. 2, UE-1 is in the network signal coverage scenario of base station 1, and UE-1 may communicate with UE-2 via SL resources scheduled by the base station, which resources may be referred to as licensed resources or licensed bands. In addition, the UE-1 can also communicate without adopting a base station scheduling mode, and the UE-1 performs resource self-selection, namely selects resources for side-link communication from a resource pool to communicate with the UE-3 which is out of network coverage, wherein the resources can be called unlicensed resources or unlicensed frequency bands. As shown in fig. 2, terminals UE-2 and UE-4 respectively in signal coverage areas of different base stations can communicate, and UE-3 and UE-5 can build a SL link for communication in a resource self-selection manner because both are in non-coverage areas.

It should be understood that resources in this application refer to time-frequency resources. The spectrum used by SL communication may be unlicensed, licensed, and/or dedicated. Before the UE uses the unlicensed band for transmission, the UE needs to perceive whether the (sense) channel is idle (idle) before accessing the channel and starting to transmit data, and if the channel is idle for a certain time, the UE can occupy the channel, and if the channel is not idle, the UE needs to wait for the channel to resume to idle again before occupying the channel. UEs operating in various forms of different communication protocols need to meet regulations to use unlicensed bands, and thus use spectrum resources relatively fairly and efficiently. For example, the UE may contend for the channel through the LBT mechanism.

The LBT mechanism is a channel access rule based on random back-off (random back-off). The LBT access mode generally employs an energy-based detection, and/or a signal type-based detection method, etc. For example, a corresponding detection threshold (Energy Detection Threshold) is set based on the detection of energy, and when the energy detected by the UE exceeds the detection threshold, it is determined that the channel is busy, and the access to the channel is not allowed; and when the energy detected by the UE is lower than the detection threshold and the energy is lower than the detection threshold for more than a period of time, the channel is considered to be idle, and the channel is allowed to be accessed.

In addition, unlicensed spectrum resources can be shared between different terminal devices, i.e. a plurality of terminal devices can use the spectrum for information reception and transmission as long as certain regulations are met. For example, UE1 obtains a channel occupation time (Channel Occupancy Time, COT) of a part of the spectrum resources in the unlicensed band through LBT, where COT is a time length of continuously transmittable information corresponding to the contended spectrum resources. After acquiring the COT, the UE1 may share the spectrum with other UEs, and send the available resource information in the COT, including the corresponding time and the frequency domain position, to other UEs 2, where after receiving the shared information, the UE2 may send information using the specified frequency domain resource at the specified time.

The device applied to the D2D technology is generally a half duplex device, that is, the UE can only receive or transmit information at the same time, and does not have the capability of transmitting and receiving simultaneously.

Currently, for SL communication, a network device may (pre) configure a resource pool for a UE, one SL resource pool, including a number of sub-channels in the frequency domain, and the time domain is in units of SL time slots. One of the subchannels consists of a set of consecutive physical resource blocks (Physical Resource Block, PRBs) that may represent the subchannel size, with specific values being allocated to the resource pool by higher layers. In the embodiments described below in this application, RBs may refer to PRBs.

One SL slot is located within one slot (slot) in the time domain, occupies a continuous plurality of symbols (symbols), and the starting symbol position (start symbols) of the SL slot and the number of occupied continuous symbols (SL-length symbols) are configured by a higher layer. The time domain starting position and the number of time duration symbols of all the SL slots in one resource pool are the same. SL physical channels that may be transmitted over SL time slots include a side physical shared channel (Physical Sidelink Shared Channel, PSSCH), a side physical broadcast channel (Physical Sidelink Broadcast Channel, PSBCH), a side physical broadcast channel (Physical Sidelink Control Channel, PSCCH), and a side physical feedback channel (Physical Sidelink Feedback Channel, PSFCH).

Wherein, the resource pool configured for transmitting information may be referred to as TX resource pool, and the resource pool for receiving information may be referred to as RX resource pool. The UE can only transmit PSCCH or PSCCH in one TX resource pool for a given time, but can receive information in multiple RX resource pools.

For unlicensed spectrum resources of FR1, the UE may perform LBT on each 20MHz channel and may perform a channel access procedure on a multi-channel transmission, one transmission may be performed on multiple channels simultaneously, before transmitting SL data. To avoid that one 20MHz LBT channel is present in a different resource pool, it is possible that one resource pool configured for a UE may comprise at least one 20MHz bandwidth channel, as shown in fig. 3a, and the resource pool for the UE may comprise a plurality of 20MHz bandwidth channels, such as channel 1, channel 2, channel 3 and channel 4.

As shown in FIG. 3b, one LBT channel consists of RB set and guard bands at both ends. The guard bandwidth is used to ensure that the signal/energy on the current channel does not interfere with the adjacent channel. The guard bandwidths at the two ends may be symmetrical or asymmetrical, i.e. the number of PRB resources contained in the bandwidths of the two parts may not be equal.

When a terminal passes LBT on multiple channels of an unlicensed band, the resources available to the terminal at this time are not only resources on RB sets in two channels, but also guard band between two adjacent RB sets, and the available partial frequency domain resources are called a resource block set (RB set, also called RB set). As shown in fig. 3b, one LBT channel (20 MHz) includes two parts of RB set and guard bandwidth, so when the position and size of the guard bandwidth are determined, the starting RB position of RB set, the ending RB position and the number of RBs in the RB set are also determined. In addition, when the UE performs an LBT operation on a plurality of consecutive 20MHz channels and successfully accesses the channels, a guard bandwidth between two RB sets may be used to transmit data, and resource utilization is improved, i.e., RBs of the portion shown by the guard bandwidth may be used to transmit resources. For a carrier configured by a certain SCS, the guard bandwidth of the UE may be determined by the higher layer parameters startCRB and nrofCRBs. For example, when a UE is configured with n-1 guard bandwidths, the UE may determine, according to parameters startCRB and nrofCRBs corresponding to the n-1 guard bandwidths, a starting RB, an ending RB, and the number of RBs of each RB set in n available RB sets. Specific determination methods will be described in the following specific embodiments of the text application, and are not described herein.

Wherein, based on different carriers and subcarrier Spacing (SCS), the guard bandwidth configured for the UE may be different, and thus the determined RB sets are different, and the number of RBs in the RB sets may be different. For example, if scs=15 KHz, the number of RBs in one RB set ranges from 100 to 110; for scs=30 KHz, at most one RB set contains 56 RBs, and the number of RBs in the other RB sets ranges from 50 to 55. For scs=60 KHz, there is no RB structure of the interface.

In one embodiment, the LBT mechanism accesses unlicensed spectrum, and needs to meet regulatory requirements of countries and regions for using unlicensed bands, for example, 5GHz band, and the UE accesses a channel of 20MHz, and needs to meet requirements of at least minimum occupied channel bandwidth (Occupied Channel Bandwidth, OCB) to occupy the channel. For example, if the minimum OCB requirement is at least 80% of the normal bandwidth, for example, 20MHz, that is, the resources to be transmitted of a UE need to occupy at least 16MHz of bandwidth, the 20MHz channel can be preempted.

To meet the above requirement of OCB, a resource set allocation manner based on staggered distribution is introduced in the current 5G, and a resource block set of staggered distribution is simply referred to as a staggered resource block set (denoted as interlace), where each interlace is composed of the same/approximately the same number of scattered RBs by dividing a 20MHz bandwidth into a plurality of resource block sets of staggered distribution. The resource allocation of the interference can be applied to the selection of unlicensed spectrum of the side links.

For example, for a 20MHz bandwidth channel, there are defined not less than 10 RBs included in one interface. If SCS is equal to 15KHz, the number of RBs included in RB set in a 20MHz channel is in the range of 100-110, and a 20MHz channel comprises 10 interlaces, if the total number of RBs is 100, the number of RBs of 10 interlaces is 10; if the total number of RBs is 110, the number of RBs of 10 interlaces is 11; if the total number of RBs is not equal to 100 or 110, the number of RBs in 10 interlaces may be different at this time, that is, the number of interleaved RBs in part of interlaces is 10 and the number of interleaved RBs in part of interlaces is 11.

In addition, if SCS is equal to 30KHz, a 20MHz channel includes RBs ranging from 50 to 56, then a 20MHz channel may include 5 interlaces, where the number of interleaved RBs in part (or all) interlaces is 10, and may include 11 in part (or all) interlaces.

Furthermore, for wideband transmission, if the resource block corresponding to the guard band is allowed to be used, the number of available RBs may further include RB resources included in the guard band.

In one embodiment, the subchannel size defined in Rel-16 may be configured to 10, 12, 15, 20, 25, 50, 75 or 100 RBs, and the UE may determine whether to use a continuously composed subchannel for data transmission or a subchannel composed of RBs distributed in an interleaved manner according to the (pre) configuration of the resource pool. For example, assuming that one interlace includes at least 10 RBs, if the size of a subchannel configured by the resource pool is 10 RBs and the resource pool is configured to disable the interlace transmission, the UE may determine that a subchannel composed of 10 consecutive RBs performs data transmission; if the resource pool is configured such that the inter transmission can be used, the UE can determine to use the sub-channel consisting of 10 RBs distributed in a staggered manner for data transmission.

As shown in fig. 4a, the RB set includes a plurality of subchannels, wherein the subchannels may be formed of consecutive RBs, as shown in fig. 4a as left-hand side illustrating subchannel 1 and subchannel 2. The sub-channels may also be interlaces of staggered RB composition, as shown for sub-channel 1 on the right in fig. 4a, corresponding to interlace 1; and subchannel 2, corresponding to interlace 2.

As described above, regardless of whether the resource pool is configured with consecutive RBs or with RBs in an interleaved distribution as subchannels, the subchannels may be the smallest unit of SL resource allocation. For scenarios where the inter transmission is disabled in the resource pool, the PSCCH and PSSCH may be located on the smallest indicated sub-channel of the allocated PSSCH, and always within one sub-channel, in the manner defined in Rel-16. For scenarios where inter transmission is enabled in the resource pool, i.e. PSCCH and PSSCH may employ inter transmission, PSCCH and PSSCH may reuse similar design principles, i.e. the start position of PSCCH is aligned with the start position of allocated PSSCH and always within one sub-channel containing inter RB.

Like Rel-16, the resource pool (pre) configuration will ensure that the PSCCH allocation is not larger in size than the subchannel size, so that the UE need only blind decode one PSCCH in a given subchannel. For example, the resource pool enables the inter, the sub-channel size is the same as one inter (e.g., 10 PBRs), one PSCCH/PSSCH transmission has two allocated sub-channels, PSCCH and PSSCH can be time-division multiplexed (time-division multiplexing, TDM) and frequency-division multiplexed (Frequency Division Multiplexing, FDM), but PSCCH can always be allocated only within one sub-channel.

In addition, for a resource pool composed of a plurality of channels, that is, a resource pool including a plurality of 20MHz bandwidths, there are two possible resource allocation manners. In mode 1, the sub-channel corresponds to at least one interlace in the resource pool, i.e. for an exemplary 15KHz SCS configuration, the 20MHz bandwidth corresponds to 10 interlaces, when one sub-channel corresponds to one interlace in the resource pool, as shown in fig. 4b, the sub-channel 1 corresponds to the interlace-1 in the resource pool, and the sub-channel 2 corresponds to the interlace-2 in the resource pool, where the number of sub-channels in the resource pool is equal to 10, i.e. equal to the number of interlaces in the resource pool.

In mode 2, the sub-channels correspond to at least one interlace in each 20MHz, i.e., the interlaces in one 20MHz are numbered sequentially, then the interlaces in the next 20MHz are numbered sequentially, and then the sequence numbers of the sub-channels are continuously arranged according to the numbers. Specifically, an internal sequence number within 20MHz includes N subchannels, and each internal corresponds to a sequence number of a subchannel; then, the sequence numbering is continued for the next 20MHz, the inter sequence number is ranked to 2N, and the sub-channel sequence number is correspondingly ranked to 2N. As shown in fig. 4b, RB resources in the interlace-1 belong to the same interlace but belong to different sub-channels, i.e. sub-channel 1 or sub-channel 11, and in addition, if multiple interlaces are required to complete transmission for one data transmission, on the selection of sub-channels, continuous interlace selection (i.e. serial numbers of interlaces are continuous) or discontinuous interlace selection (i.e. serial numbers of interlaces are discontinuous) can be supported at the same time, but PSCCH is always in a fixed position of the same sub-channel.

Specifically, in order to meet the OCB regulation requirement of some areas, for unlicensed spectrum use, the SL may multiplex the foregoing inter-band structure or the foregoing sub-channel definition, but the RB set sizes configured by different operators or network devices for the UE may be different, where the number of RBs included in the inter-band of the RB set may also be different, where when the size information of the RB set of the opposite party is unknown to the two parties of communication in the scenario without network coverage or without network intervention, if the transmitting UE transmits data according to the RB set resources configured by itself, since the receiving UE does not know the guard band or RB set configuration condition of the transmitting UE, the receiving UE needs multiple blind detection to accurately obtain the resource occupation information of the transmitting UE, which results in an increase in the blind detection complexity of the receiving UE and a decrease in communication efficiency.

In another embodiment, for continuous RB transmission, an exemplary subchannel is formed by part of RBs in guard band and RB set, and in single channel access, since the configurations of guard band are different, PRB resources that can be used by the subchannel in which guard band is located are different, and for such a continuous transmission structure, the use of the subchannel in which guard band is located for transmitting information can be avoided. As shown in fig. 4c, the sub-channel 1 includes guard band and part of RBs in the RB set-1, so that it is possible to avoid transmitting information using the sub-channel 1.

In order to solve the above-mentioned problems, the embodiments of the present application provide a method for determining resources of unlicensed spectrum, where both UEs of two parties of communication are configured to transmit information by using multiple RB resources at fixed positions in an interlace set of resource blocks, so that receiving UEs can avoid increasing blind detection times caused by unaware of the resource information of RBs in the interlace occupied by transmitting data, and can effectively improve communication efficiency. Furthermore, during primary communication, the two communication parties can firstly send and receive information according to N RBs at fixed positions in the interface; when the subsequent communication is carried out, the communication parties can interact respective RB set information, so that the final resource selection is determined according to the RB information of the two parties, and the resource utilization rate is improved.

In addition, the communication apparatus in fig. 1 in the embodiment of the present application may be a functional module in a device, may be a network element in a hardware device, for example, a communication chip in a mobile phone, may be a software function running on dedicated hardware, or may be a virtualized function instantiated on a platform (for example, a cloud platform).

The communication device of fig. 1 may be implemented by the communication device 500 of fig. 5. Fig. 5 is a schematic diagram of a hardware configuration of a communication device applicable to an embodiment of the present application. The communication device 500 comprises at least one processor 501, communication lines 502, a memory 503 and at least one communication interface 504.

The processor 501 may be a general purpose central processing unit (central processing unit, CPU), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the programs of the present application.

Communication line 502 may include a pathway to transfer information between the aforementioned components, such as a bus.

Communication interface 504, using any transceiver-like device, is used to communicate with other devices or communication networks, such as an ethernet interface, a RAN interface, a wireless local area network (wireless local area networks, WLAN) interface, etc.

The memory 503 may be, but is not limited to, a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (random access memory, RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (electrically erasable programmable read-only memory, EEPROM), a compact disc (compact disc read-only memory) or other optical disk storage, optical disk storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory may be self-contained and coupled to the processor via communication line 502. The memory may also be integrated with the processor. The memory provided by embodiments of the present application may generally have non-volatility. The memory 503 is used for storing computer-executable instructions related to executing the present application, and is controlled by the processor 501 to execute the instructions. The processor 501 is configured to execute computer-executable instructions stored in the memory 503, thereby implementing the methods provided in the embodiments of the present application.

Alternatively, the computer-executable instructions in the embodiments of the present application may be referred to as application program codes, which are not specifically limited in the embodiments of the present application.

In a particular implementation, as one embodiment, processor 501 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 5.

In a particular implementation, as one embodiment, the communications apparatus 500 can include a plurality of processors, such as processor 501 and processor 507 in fig. 5. Each of these processors may be a single-core (single-CPU) processor or may be a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

In a specific implementation, as an embodiment, the communication apparatus 500 may further include an output device 505 and an input device 506. The output device 505 communicates with the processor 501 and may display information in a variety of ways. For example, the output device 505 may be a liquid crystal display (liquid crystal display, LCD), a light emitting diode (light emitting diode, LED) display device, a Cathode Ray Tube (CRT) display device, or a projector (projector), or the like. The input device 506 is in communication with the processor 501 and may receive user input in a variety of ways. For example, the input device 506 may be a mouse, a keyboard, a touch screen device, a sensing device, or the like.

The communication apparatus 500 may be a general-purpose device or a special-purpose device. In a specific implementation, the communication apparatus 500 may be a portable computer, a network server, a palm top computer (personal digital assistant, PDA), a mobile handset, a tablet computer, a wireless terminal, an embedded device, or a device having a similar structure as in fig. 5. The embodiments of the present application are not limited to the type of communication device 500.

The following specifically describes a communication method provided in the embodiments of the present application.

The embodiment of the application provides a method for determining resources of unlicensed spectrum, which is applied to a scenario that a first terminal sends information to a second terminal through unlicensed spectrum, as shown in fig. 6, and the method comprises the following steps.

S601: the first terminal accesses the channel and determines a first set of interleaved resource blocks.

In the embodiment of the present application, when the UE determines the position and size of the RB set(s) resource in the resource pool according to the guard band configuration information and the resource pool includes multiple RB sets, the guard band frequency domain resource between two adjacent RB sets also belongs to the resource pool, that is, the available resource in the resource pool is the union of the guard bandwidths between the RB set and the adjacent RB set, and the PRB resource set in the resource pool is referred to as a candidate resource set.

In one embodiment, as can be seen from the foregoing description, the first terminal may access the channel through the LBT mechanism, obtain the channel usage right, and determine, according to the size of the sideline data, the frequency domain resource occupied by the sideline data in the COT. For example, UE1 performs LBT in units of 20MHz bandwidth resources, and determines a set of resources occupied by transmission data, where the occupied set of resources may include a continuous set of RB resources, or may include multiple sets of interleaved resources.

In addition, the carrier of the UE may have multiple RB sets, and the frequency domain start position of one resource pool may be the start position of one RB set, and the frequency domain end position may be the end position of one RB set, that is, one resource pool at least includes one RB set, and may also include time-frequency resources greater than one RB set, such as including part of time-frequency resources in one RB set and another RB set. For example, when the frequency domain resource in a certain resource pool includes a subset of RB sets, since the channel unit of the LBT mechanism performed by the unlicensed spectrum is a 20MHz bandwidth channel, in some areas or countries, the subset of the RB sets of resources cannot be used to send information due to failure to meet the OCB regulation requirement, so that the resource utilization rate is reduced.

In the embodiment of the present application, the available resource set determined by the UE1 includes an interleaved resource set as an example.

For example, the first terminal UE1 determines that at least one set of interleaved resources is included in the available set of resources through the LBT access channel.

By way of example, if SCS is equal to 15KHz, a 20MHz RB set can include 10 interlaces, interlace-1, interlace-2, … … interlace-10, including a number of RBs ranging from 100 to 110. Wherein, the number of RBs in 10 interlaces may be the same or different, and the number of RBs in an interlace may be 10 or 11.

In one embodiment, UE1 determines the available one or more interface resources, and may first LBT the RB set or 20MHz channel, and then determine which one or more interface resources to select from. Alternatively, UE1 may determine which one or more resources to select, and then LBT the one or more RB sets where the one or more resources are located or the one or more 20MHz channels where the one or more resources are located.

In the examples of the present application, UE1 determines the available resource set through LBT, and by way of example, the embodiment of the present application may be described by taking the first interlace resource set (interlace-1) included in the available resource set as an example. So that UE1 may send information to UE2 over some or all of the resources in the first set of interleaved resources, illustratively, the first set of interleaved resources, inter 1, includes M RBs of interleaved distribution.

The UE may determine information of the RB set corresponding to each protection bandwidth according to the configured configuration information of at least one protection bandwidth. Wherein one guard bandwidth corresponds to at least two RB sets. In addition, the UE may determine a set of resource pool frequency domain resources according to configuration information of the resource pool.

In one embodiment, when the UE supports large bandwidth transmission, the candidate set of resources for the UE may also include RBs occupied by the guard bandwidth, i.e., RBs between two adjacent sets of RBs. The resources may be used for sidestream communications between UEs, including UEs transmitting and receiving at least one of the following physical channels: such as PSCCH, PSSCH, PSDCH, PSFCH or PSBCH, etc., wherein the traffic types carried by the PSSCH may include unicast, multicast and/or broadcast traffic types.

Further, if the UE performs LBT through at least two RB sets adjacent to the guard band, the UE may use RBs included in the guard band for transmission. For example, when the UE1 supports using the guard band resource, if the UE1 passes LBT in both the RB set-0 and the RB set-1, the available resources determined by the UE1 are RBs included in the RB set-0 and RBs included in the RB set-1, and RBs included in the guard band between the two RB sets. If UE1 passes LBT only in RB set-1 and does not pass LBT in RB set-0, UE1 can use only RB resources included in RB set-1 and cannot use RBs included in guard band.

In one embodiment, the UE may obtain the first configuration information and the second configuration information of the side link under network signal coverage by receiving a system message block (System Information Block, SIB) of the network device, radio resource control (Radio Resource Control, RRC) signaling of a cell-specific, or RRC signaling of an end user level (UE-specific). Alternatively, the UE may also use the device factory pre-configured SL first configuration information (e.g., when there is no network signal coverage).

In particular, the first configuration information may be used to indicate Bandwidth Part (BWP) configuration information of the SL, and/or SL resource pool configuration information, where the SL resource pool configuration information is used to indicate the SL resource pool. The second configuration information may be used to indicate the guard bandwidth configuration information, and may specifically include a common resource block (Common Resource Block, CRB) startCRB of the guard bandwidth start, and the number nrofCRBs of CRBs.

Next, a specific manner of determining the RB set by the UE according to the configuration information of the guard band is described.

The UE obtains N according to the acquired _RB-set -1 configuration information of guard band, N can be determined _RB-set And RB sets. Wherein the start position of the guard band can be used as a parameter It is indicated that the size of the guard band can be used +.>Representing s.epsilon. {0,1, …, N _RB-set -2}, representing N _RB-set The s-th in 1 guard band, μ represents the parameter corresponding to the subcarrier spacing.

The UE may determine the starting CRB parameters of the RB set by the following equation 1Determining the ending CRB parameter of the RB set according to equation 2 below>Wherein (1)>And->May be represented by RB index.

The UE may then followAnd->The number of RBs included in the RB set is obtained as follows: /> Wherein +.in the above formula 1 and formula 2>The starting CRB position representing the first RB set, and (2)>Representing the carrier size, i.e. the number of RBs in the carrier, s e {0,1, …, N _RB-set -1}。

As shown in fig. 7, the carrier has a plurality of RB sets, RB set-0 and one RB set-1 are distinguished by guard band. When UE1 determines the resource location of the RB set and the number of RBs included in the RB set according to parameters startCRB and nrofCRBs, etc. of the guard bandwidth configured for it, the number of RBs included in each interlace resource set in the RB set may be different. As can be seen from FIG. 7, if the number of RBs in RB set-0 is 102, it can be seen from the figure that the number of RBs in interlace-1 and interlace-2 in RB set-0 is 11, and the number of RBs in interlaces-3-10 is 10, i.e. the sizes of the different numbered interlace resource sets may be different.

S602: the first terminal sends first side information to the second terminal on N resource blocks in the M resource blocks.

The first terminal may determine that the first set of staggered resource blocks includes M staggered resource blocks.

That is, the first terminal may determine to select only a portion of the interleaving resources in the first interleaving resource block set for transmitting the side row information, such as selecting N RBs therein, according to the configuration. Specifically, the first terminal determines N resource blocks in the M resource blocks, where the N resource blocks belong to the first staggered resource block set, N and M are positive integers, and the value of N is smaller than that of M.

In one embodiment, the value of N may be preconfigured by the first terminal, or configured by the network device for the first terminal, or predefined by the protocol.

In one embodiment, the value of N may be 10.

For example, if N is set to 10, UE1 chooses to transmit the first side line information using only 10 RBs in the interface-1. If N is preconfigured to 5, UE1 chooses to send the first side information using only 5 RBs in the interface-1.

In one embodiment, the N resource blocks are the N resource blocks with the smallest or largest index among the M resource blocks, or include the N resource blocks located in the middle of the M resource blocks.

For example, as shown in FIG. 7, the interface-1 contains 11 RBs with RB indices { RB0, RB10, …, RB100 }. If n=5, UE1 may select 5 RBs with the smallest RB index, UE1 may transmit only in the frequency domain with RB indexes { RB0, RB10, RB20, RB30, RB40 }. Alternatively, UE1 may select the 5 RBs with the largest RB index, and UE1 may transmit only in the frequency domain with RB indexes { RB100, RB90, RB80, RB70, RB60 }. Alternatively, UE1 may select 5 RBs with the RB index in the middle of the RB set, and UE1 may transmit only in the frequency domain with RB indices { RB40, RB50, RB60, RB70, RB80 }.

S603: the second terminal determines to receive the first side information from the first terminal on N resource blocks in the L resource blocks.

The second terminal may obtain the configuration information of the resource pool and the protection bandwidth through the first configuration information and the second configuration information configured by the network device, determine the guard band position, determine the corresponding RB set position according to the guard band, and include the number of RBs in the RB set, similar to the method in the foregoing step S601.

Illustratively, the RB set determined by the UE2 includes a second set of interleaved resource blocks, where the second set of interleaved resource blocks includes L RBs. Then, the UE2 may determine to receive information on N RBs from among L RBs included in the second set of interleaved resource blocks according to the configured N values. Wherein N resource blocks belong to L resource blocks, N and L are positive integers, and the value of N is smaller than that of L.

In a possible implementation manner, due to different guard band configurations of UE1 and UE2, the sizes of available RB sets of the transmitting end UE1 and the receiving end UE2 are different, and through the above implementation manner of the present application, the transmitting and receiving end may transmit by using a fixed position and a fixed number of partial RBs (N) in the RB set, so that the number of blind detection times of the receiving end, which is increased due to different numbers of RBs in the staggered resource set, may be effectively reduced, and communication efficiency may be improved.

Illustratively, as shown in FIG. 7, where the available RB set of UE1 includes 102 RBs, then for each RB set in the resource pool, UE 1's inter-1-inter-2 contain 11 RBs, and inter-3-inter-10 each include 10 RBs. If the available RB set of UE2 contains 103 RBs, then for each RB set in the resource pool, the inter-1-inter-3 of UE2 contains 11 RBs, and the inter-3-inter-10 each contain 10 RBs. According to the above method, as shown in fig. 8, when UE1 and UE2 are both configured with n=10, if UE1 and UE2 determine to use the frequency domain resources of inter-1 to inter-3 for communication, UE1 only takes the first 10 RBs of inter-1, inter-2 and inter-3 for data transmission, and UE2 also takes the first 10 RBs of inter-1, inter-2 and inter-3 for data reception.

In one embodiment, the first sidestream information may include sidestream control information and/or sidestream data information. For example, in the above step S602, the first terminal sends the PSSCH to the second terminal on N resource blocks, where the PSSCH includes first side line information, specifically may include side line control information, or includes side line data. That is, in the embodiment shown in fig. 6, the first terminal and the second terminal may transmit side line data or side line control information through the fixed number of configured RBs, N RBs at a fixed location, for example, the first PSSCH, the second PSSCH, etc. are sequentially transmitted through N RBs.

In one embodiment, the transmitting end and the receiving end may transmit and receive information using N RBs of a fixed number and fixed location according to the foregoing embodiments. Or the sending end and the receiving end can also adopt fixed N RBs to send and receive information only when in first transmission, then inform the opposite side of respective RB set information or protection bandwidth information and the like through signaling interaction, and negotiate the time-frequency resource position of the subsequent sending information, thereby improving the utilization rate of frequency spectrum resources and further improving the communication efficiency.

As shown in fig. 9, the method may further include the following steps.

S901: the first terminal accesses the channel and determines a first set of interleaved resource blocks.

Reference is made to the description related to the aforementioned step S601.

S902: the first terminal sends first side information to the second terminal on N resource blocks in the M resource blocks.

Reference is made to the description related to the aforementioned step S602.

In one implementation, the first side-row information does not include side-row data and may include first side-row synchronization information. The side-row synchronization information may include a side-row synchronization signal and a PBCH block, and the first side-row information may be a first S-SSB, for example.

The interactive side uplink synchronization information between the first terminal and the second terminal may be transmitted by an existing resource selection method or at a designated resource location, or may be transmitted by the above resource determination method provided in the present application.

S903: the second terminal determines to receive the first side information from the first terminal on N resource blocks in the L resource blocks.

Reference is made to the description related to the aforementioned step S603.

That is, the second terminal may determine, according to a predefined or configured value of N, that the first side information from the first terminal may be received on N resource blocks in the second resource set, e.g., obtain S-SSB, or obtain SCI or other indication information included in the first side information.

S904: the second terminal sends first indication information to the first terminal.

In an exemplary embodiment, if the at least one protection bandwidth configured by the second terminal includes a first protection bandwidth, the RB set determined by the second terminal according to the first protection bandwidth includes L resource blocks, the first indication information may be used to indicate information of the first protection bandwidth, the first protection bandwidth is used to determine L resource blocks, and/or the first indication information may be used to indicate L resource blocks.

In one embodiment, the second terminal may send the first indication information through some or all of the resources in the N RBs determined in the foregoing step S903.

Correspondingly, the first terminal may receive first indication information from the second terminal on the N resource blocks, and determine L resource blocks included in the available RB set of the second terminal according to the content indicated by the first indication information.

In one embodiment, the first indication information may be carried in a physical side uplink broadcast channel PSBCH, or in radio resource control (Radio Resource Control, RRC) signaling, or in a medium access control (Medium Access Control, MAC) Control Element (CE), or in side uplink control information (Sidelink Control Information, SCI).

S905: the first terminal sends second indication information to the second terminal.

In an exemplary embodiment, if the at least one protection bandwidth configured by the first terminal includes a second protection bandwidth, the RB set determined by the first terminal according to the second protection bandwidth includes M resource blocks, the second indication information may be used to indicate information of the second protection bandwidth, the second protection bandwidth is used to determine the M resource blocks, and/or the second indication information may be used to indicate the M resource blocks.

In one embodiment, the first terminal may transmit the second indication information to the second terminal through some or all of the resources in the N RBs determined in the foregoing step S902.

In one embodiment, the second indication information may be carried in the side uplink synchronization signal and the PBCH block S-SSB, as in the first S-SSB in step S902, that is, step S902 and step S905 may be transmitted simultaneously, that is, the first S-SSB may include the second indication information for indicating the M resource blocks of the first terminal side to the second terminal.

Alternatively, the second indication information may be carried in a physical side-link broadcast channel PSBCH of the S-SSB, or in radio resource control (Radio Resource Control, RRC) signaling, or in a medium access control (Medium Access Control, MAC) element (CE), or in side-link control information (Sidelink Control Information, SCI).

For example, for a unicast scenario of SL communication, if the transmitting end UE1 sends information to the UE2, the UE1 may send second indication information to the UE2 through RRC signaling of the PC5 port, where the second indication information is used to indicate information of the RB set configured by the UE 1. In addition, the receiving end UE2 may also send first indication information to the UE1 through RRC signaling of the PC5 port, where the first indication information is used to indicate information of the RB set configured by the UE 2.

S906: the first terminal determines to send second sidestream information to the second terminal on Y resource blocks.

The transmitting UE1 may determine the resource of the subsequent transmitting sidestream information in the following two manners, where the second sidestream information includes sidestream data, and may be, for example, PSSCH. Correspondingly, the receiving UE2 may also determine the resource location of subsequently receiving the sidestream information from UE1 in the following two ways.

Mode 1: the sending end determines to adopt an RB set with smaller RB number in the interface as a transmission resource in the RB sets of the sending end and the receiving end.

For example, if the inter set includes M RBs in the RB set of UE1 and the inter set includes L RBs in the RB set of UE2, the value of Y is the smaller of the value of M and the value of L.

In an embodiment, the first terminal may determine, according to the first indication information received from the second terminal, that, in the available resource set of the first terminal, the interlace includes M RBs, and that, in the available resource set of the second terminal, the interlace includes L resource blocks, and if M > L, it is determined that second side line information, that is, y=l, is sent to the second terminal on the L resource blocks. If M < L, it is determined that the second sidestream information is transmitted to the second terminal on M resource blocks, i.e., y=m.

In another embodiment, the first terminal determines an intersection of the first terminal and the second terminal, i.e. if the intersection of M resource blocks and L resource blocks of the interlace is Y resource blocks, the first terminal determines to send the second sidestream information to the second terminal on the Y resource blocks.

As shown in fig. 10, when UE1 and UE2 perform data interaction for the first time and interact with the first/second indication information of the RB set (e.g., through RRC signaling interaction) according to the foregoing method, N RBs at fixed positions on the interlaces are selected for data transmission and reception, e.g., n=10, and the first 10 RBs in each interlace are selected for transmission. When the UE1 and the UE2 determine to perform resource selection according to the method 1 in the subsequent transmission of the second side line information (side line data), since the RB set of the UE1 includes 102 RBs and the RB set of the UE2 includes 103 RBs, it is determined that the RB set=min {102, 103} = 102, that is, it is determined that the RBs in the inter are occupied according to the resource allocation method on the UE1 side. That is, side row data is transmitted according to the configuration mode of the RB set of UE1, if UE1 and UE2 determine to use the frequency domain resources of inter-1 to inter-10, then UE1 takes the first 11 RBs of inter-1 and inter-2 and the first 10 RBs of inter-3 to inter-10 to transmit the second side row information, so that UE2 can receive the second side row information at the corresponding resources according to the same mode 1, i.e., the first 11 RBs of inter-1 and inter-2 and the first 10 RBs of inter-3 to inter-10.

Mode 2: the sending end determines to adopt the RB set of the sending end as the transmission resource.

That is, the first terminal transmits the second sidestream information to the second terminal on M resource blocks, and correspondingly, the second terminal receives the second sidestream information on M resource blocks.

That is, the transmitting end transmits according to the RB set configured by itself, and the receiving end receives according to the RB set configuration of the transmitting end. As shown in fig. 11, when UE1 and UE2 interact with the first/second indication information (e.g., through RRC signaling interaction) according to the foregoing method, N RBs at fixed positions on the interface are selected for data transmission and reception, e.g., n=10. When the UE1 and the UE2 determine to perform subsequent data interaction according to the mode 2, if the UE1 and the UE2 determine to use frequency domain resources of the interlaces-1 to-3, since 52 RBs are included in the RB set of the UE1 and 55 RBs are included in the RB set of the UE2, the data interaction can be performed according to the configuration mode of the RB set of the UE1, the UE1 occupies the first 11 RBs of the interlaces-1 and-2, and the first 10 RBs of the interlaces-3 send side line data, and then the UE2 only takes the first 11 PRBs of the interlaces-1 and-2 and the first 10 RBs of the interlaces-3 to receive and decode the side line data.

In an embodiment, the first terminal and the second terminal perform data interaction, and the mode of selecting the resource adopts the mode 1 or the mode 2, which may be preconfigured, for example, both UE1 and UE2 are preconfigured to determine the transmission resource in the mode 1. Alternatively, the manner of selecting the resource may also be configured by the network device, for example, the network device sends third indication information to the first terminal and the second terminal to configure. Or, interaction between the two communication parties may be also possible, for example, the first terminal sends third indication information to the second terminal, for indicating that the transmission resource is determined in mode 2.

For example, the method may further comprise: the network device sends third indication information to the first terminal/the second terminal, wherein the third indication information is used for indicating that the resource allocation mode corresponding to the second sidestream information is mode 1 or mode 2.

For example, the third indication information may be carried in 1 bit information, and when the bit value is 0, it is determined in mode 1; alternatively, when the bit value is 1, it means that the transmission resource is determined in the manner 1.

When only one side of the two communication parties is configured with the resource configuration mode, the resource can be determined according to the resource configuration mode. If both communication parties are configured with the resource allocation method, but the resource determination methods configured by both communication parties are not identical, transmission resources may be determined by, for example, pre-agreeing to use the resource allocation method of the transmitting end, for example, the method 2 configured by the transmitting end UE 1. Or, the transmission resource is also determined by means of the interactive resource configuration, for example, UE1 sends third indication information to UE2 for indicating that the transmission resource is determined in means 1.

In an embodiment, in the foregoing step, the specific indication content of the first indication information or the second indication information may be information of each protection bandwidth in the resource pool configured by the terminal, or the first indication information or the second indication information is only information indicating the protection bandwidth with the largest number of RBs in the RB set corresponding to the protection bandwidth on the terminal side.

In one embodiment, if the content indicated by the first indication information or the second indication information is different, the number of bits of the bearing information is different, for example, the first indication information or the second indication information may be borne in X bits. The value of X may be a positive integer, where X is related to at least one of a guard bandwidth configured at the terminal side, the number of resource sets in the resource pool, and a subcarrier interval.

The following list of several possible indication modes of the first indication information or the second indication information, and the number of bits required for the different indication modes, i.e. the value of X.

1. Information of n-1 guard bands in the interactive resource pool:

if the configuration information corresponding to the guard band is interacted between the sending end and the receiving end, the startCRB parameter and the nrofCRB parameter, and if n RB sets exist in the resource pool, n-1 guard band information is needed.

The startCRB parameter has 275 values, and indicates that the number of bits required by one startCRB parameter is: ceil (log 2 (275))=9bit, the nrofCRBs parameter has a total of 16 values, indicating that one nrofCRBs parameter requires the number of bits: ceil (log 2 (16))=4bit, and therefore, information indicating one guard band requires 9+4 =13bit.

The number of bits required for n-1 guard band information is: x= (n-1) × (9+4) =13× (n-1). For example, up to 4 guard bands are configured for the UE, i.e., n-1 has a maximum value of 4, so X has a maximum value of: x=13×4=53 bits.

Then, the receiving end of the first/second indication information may obtain RB set information through the guard band information.

2. Information of n RB sets in the interaction resource pool:

for example, when SCS is 15KHz, the number of RBs included in the RB set is 100 to 110, and total 11 values are required, where x=n×ceil (log 2 (11))=n×4bit. For example, a maximum of 5 RB sets are configured for the UE, so the maximum value of X is: x= 4*5 =20bit.

If SCS is 30khz, the number of RBs included in the RB set is 50 to 56, and a total of 7 values are required, where x=n×ceil (log 2 (7))=n×3 bits. For example, a maximum of 5 RB sets are configured for the UE, so the maximum value of X is: x= 3*5 =15 bits.

3. Information of m-1 guard bands where LBT was successful was interacted with:

assuming that the number of channels for which the current LBT of the UE is successful is m, only information of m-1 guard bands for which the LBT is successful may be interacted. In contrast to the interaction mode 1 or mode 2 described above, m is less than or equal to n.

If the startCRB parameter and nrofCRB parameter of the guard band are interacted, assuming that m RB sets LBT pass in the resource pool, m-1 guard band information is required. From the above algorithm, the number of bits required for n-1 guard band information is: x= (m-1) × (9+4) =13× (m-1). UE configures maximum 4 guard bands, i.e. maximum value of m-1 is 4, so maximum value of X is x=13×4=53 bit.

4. Information of m RB sets for which interactive LBT is successful:

assuming that the number of channels for which the current LBT of the UE is successful is m, only information of m RB sets for which the LBT is successful may be interacted. In contrast to the interaction mode 1 or mode 2 described above, m is less than or equal to n.

For example, when SCS is 15KHz, the number of RBs included in the RB set is 100-110, and total 11 values are obtained, and the number of bits required at this time is: x=m×ceil (log 2 (11))=m×4bit. For example, a maximum of 5 RB sets are configured for the UE, so the maximum value of X is: x= 4*5 =20bit.

If SCS is 30KHz, the value range of RB number included in RB set is 50-56, and total 7 values are obtained, and the required bit number is: x=m×ceil (log 2 (7))=m×3 bits. For example, a maximum of 5 RB sets are configured for the UE, so the maximum value of X is: x= 3*5 =15 bits.

5. And (5) the guard band information with the largest RB number occupied by the guard band in the interactive resource pool:

the resource pool of the UE is configured with configuration information corresponding to n-1 guard bands, and only the startCRB parameter and nrofCRB parameter of the guard band corresponding to the RB set with the largest RB number can be interacted. The receiving end may use this information as a reference for other guard bands, or may take this approach when both communicating parties have the same guard band configuration.

From the above calculations, it can be seen that the startCRB parameter and nrofCRB parameter of a guard band are configured, and the number of bits required is: x= (9+4) bit=13 bit.

6. Information of the RB set with the least number of RBs in the RB set in the interaction resource pool:

if n RB sets are configured in the resource pool of the UE, only information including the RB set with the minimum number of RBs in the resource pool may be interacted.

As is clear from the above calculation, when scs=15 kHz, the number of RBs included in the RB set is 100 to 110, and a total of 11 values, x=ceil (log 2 (11))=4bit is required.

If scs=30 khz, the number of RBs included in the RB set is 50 to 56, and the total number of RBs is 7, and the number of bits required at this time is: x=ceil (log 2 (7))=3bit.

Through the embodiment, the sending end and the receiving end can determine the resource selection mode of the subsequent transmission data by interacting the configuration information of the respective RB sets, so that the utilization rate of resources is improved, and the communication efficiency is improved.

Based on the foregoing embodiment, the present application further provides a communication device, configured to implement the steps implemented by the first terminal in the foregoing embodiments. As shown in fig. 12, the communication device includes: a processing module 1201 and a transceiver module 1202.

The processing module 1201 is configured to access a channel, determine a first set of interleaved resource blocks, where the first set of interleaved resource blocks includes M resource blocks; n resource blocks are determined, wherein the N resource blocks belong to the M resource blocks, N and M are positive integers, and the value of N is smaller than that of M.

The transceiver module 1202 is configured to send the first side information to the second terminal on the N resource blocks.

In one embodiment, N may be configured to be 10.

In one embodiment, the transceiver module 1202 is further configured to receive first indication information from the second terminal; the first indication information is used for indicating a first protection bandwidth, the first protection bandwidth is used for determining L resource blocks, and/or the first indication information indicates L resource blocks, wherein L is a positive integer.

In one embodiment, the transceiver module 1202 is specifically configured to receive the first indication information on N resource blocks.

In an embodiment, the transceiver module 1202 is further configured to send second indication information to the second terminal on the N resource blocks, where the second indication information is used to indicate a second protection bandwidth, where the second protection bandwidth is used to determine M resource blocks, and/or where the second indication information is used to indicate the M resource blocks.

In one embodiment, the transceiver module 1202 is further configured to perform mode 1: and sending second sidestream information to the second terminal on Y resource blocks according to the first indication information, wherein the value of Y is the smaller of the M value and the L value, or the Y resource blocks are intersections of the M resource blocks and the L resource blocks, and the second sidestream information comprises sidestream data.

In one embodiment, the transceiver module 1202 is further configured to perform mode 2: and sending second sidestream information to the second terminal on the M resource blocks, wherein the second sidestream information comprises sidestream data.

In one embodiment, the transceiver module 1202 is further configured to receive third indication information from the network device; or, sending third indication information to the second terminal, where the third indication information is used to indicate that the resource allocation mode corresponding to sending the second sidestream information is mode 1 or mode 2.

In addition, based on the steps executed by the second terminal in the foregoing embodiment, the present application further provides a communication device, which is configured to implement the steps implemented by the first terminal in the foregoing embodiment. As shown in fig. 12, the communication device includes: a processing module 1201 and a transceiver module 1202.

Wherein, the processing module 1201 is configured to determine a second set of interleaved resource blocks, where the second set of interleaved resource blocks includes L resource blocks; and determining N resource blocks, wherein the N resource blocks belong to the L resource blocks, N and L are positive integers, and the value of N is smaller than that of L.

The transceiver module 1202 is configured to receive first side-line information from a first terminal on the N resource blocks.

In one embodiment, N is preconfigured, or configured by a network device, or predefined, for the communication apparatus 1200.

In one embodiment, N may be configured to be 10.

In an embodiment, the transceiver module 1202 is further configured to send first indication information to the first terminal, where the first indication information is used to indicate a first protection bandwidth, and the first protection bandwidth is used to determine L resource blocks, and/or the first indication information indicates L resource blocks, where L is a positive integer.

In one embodiment, the transceiver module 1202 is specifically configured to send the first indication information on N resource blocks.

In an embodiment, the transceiver module 1202 is further configured to receive second indication information from the first terminal on the N resource blocks, where the second indication information is used to indicate a second protection bandwidth, where the second protection bandwidth is used to determine M resource blocks, and/or where the second indication information is used to indicate the M resource blocks.

In one embodiment, the transceiver module 1202 is further configured to perform mode 1: and the second terminal receives second sidestream information from the first terminal on Y resource blocks according to the second indication information, wherein the value of Y is the smaller one of the M value and the L value, or the Y resource blocks are intersections of the M resource blocks and the L resource blocks, and the second sidestream information comprises sidestream data.

In one embodiment, transceiver module 1202 is further configured to: and the second terminal receives second sidestream information from the first terminal on the M resource blocks according to the second indication information, wherein the second sidestream information comprises sidestream data.

In one embodiment, the transceiver module 1202 is further configured to receive third indication information from the network device; or, receiving third indication information from the first terminal, where the third indication information is used to indicate that a resource allocation mode corresponding to the second sidestream information is mode 1 or mode 2.

In a simple embodiment, one skilled in the art will appreciate that the communication device 1200 described above may take the form shown in fig. 5. For example, the processor 501 in fig. 5 may cause the communication device 1200 to perform the method described by each network element/communication device in the method embodiment described above by invoking computer-executable instructions stored in the memory 503.

Illustratively, the functions/implementations of the transceiver module 1202 of fig. 12 may be implemented by the processor 501 of fig. 5 invoking computer-executable instructions stored in the memory 503. Alternatively, the functions/implementation of the processing module 1201 in fig. 12 may be implemented by the processor 501 in fig. 5 invoking computer executable instructions stored in the memory 503, and the functions/implementation of the transceiver module 1202 in fig. 12 may be implemented by the communication interface 504 in fig. 5.

It should be noted that one or more of the above modules or units may be implemented in software, hardware, or a combination of both. When any of the above modules or units are implemented in software, the software exists in the form of computer program instructions and is stored in a memory, a processor can be used to execute the program instructions and implement the above method flows. The processor may be built in a SoC (system on a chip) or ASIC, or may be a separate semiconductor chip. The processor may further include necessary hardware accelerators, such as field programmable gate arrays (field programmable gate array, FPGAs), PLDs (programmable logic devices), or logic circuits implementing dedicated logic operations, in addition to the cores for executing software instructions for operation or processing.

When the above modules or units are implemented in hardware, the hardware may be any one or any combination of a CPU, microprocessor, digital signal processing (digital signal processing, DSP) chip, micro control unit (microcontroller unit, MCU), artificial intelligence processor, ASIC, soC, FPGA, PLD, special purpose digital circuitry, hardware accelerator, or non-integrated discrete devices that may run the necessary software or that do not rely on software to perform the above method flows.

Optionally, an embodiment of the present application further provides a chip system, including: at least one processor and an interface, the at least one processor being coupled with the memory through the interface, the at least one processor, when executing the computer programs or instructions in the memory, causing the method of any of the method embodiments described above to be performed. In one possible implementation, the system on a chip further includes a memory. Alternatively, the chip system may be formed by a chip, or may include a chip and other discrete devices, which are not specifically limited in this embodiment of the present application.

Optionally, embodiments of the present application further provide a computer-readable storage medium. All or part of the flow in the above method embodiments may be implemented by a computer program to instruct related hardware, where the program may be stored in the above computer readable storage medium, and when the program is executed, the program may include the flow in the above method embodiments. The computer readable storage medium may be an internal storage unit of the communication device of any of the foregoing embodiments, such as a hard disk or a memory of the communication device. The computer readable storage medium may be an external storage device of the communication apparatus, for example, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a flash card (flash card) or the like provided in the communication apparatus. Further, the computer readable storage medium may further include both an internal storage unit and an external storage device of the communication apparatus. The computer-readable storage medium is used to store the computer program described above and other programs and data required by the communication apparatus. The above-described computer-readable storage medium may also be used to temporarily store data that has been output or is to be output.

Optionally, the embodiment of the application further provides a computer program product. All or part of the above-described method embodiments may be implemented by a computer program to instruct related hardware, where the program may be stored in the above-described computer program product, and the program, when executed, may include the above-described method embodiments.

Alternative embodiments of the present application also provide a computer instruction. All or part of the flow in the above method embodiments may be implemented by computer instructions to instruct related hardware (such as a computer, a processor, an access network device, a mobility management network element, or a session management network element, etc.). The program may be stored in the above-mentioned computer readable storage medium or in the above-mentioned computer program product.

From the foregoing description of the embodiments, it will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of functional modules is illustrated, and in practical application, the above-described functional allocation may be implemented by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to implement all or part of the functions described above.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another apparatus, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and the parts displayed as units may be one physical unit or a plurality of physical units, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The foregoing is merely a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method for determining resources of an unlicensed spectrum, the method comprising:

a first terminal accesses a channel, and determines a first staggered resource block set, wherein the first staggered resource block set comprises M resource blocks;

determining N resource blocks, wherein the N resource blocks belong to the M resource blocks, N and M are positive integers, and the value of N is smaller than that of M;

and sending the first side information to the second terminal on the N resource blocks.

2. The method of claim 1, wherein the N resource blocks are the N resource blocks with the smallest or largest index among the M resource blocks, or comprise the N resource blocks located in the middle of the M resource blocks.

3. A method according to claim 1 or 2, characterized in that said N is preconfigured for said first terminal or configured by a network device or predefined.

4. A method according to any one of claims 1-3, wherein N is 10.

5. The method according to any of claims 1-4, wherein the first sidestream information comprises sidestream control information and/or sidestream data information.

6. The method of any of claims 1-4, wherein the first side-line information comprises first side-line synchronization information.

7. The method according to claim 5 or 6, characterized in that the method further comprises:

the first terminal receives first indication information from the second terminal;

the first indication information is used for indicating a first protection bandwidth, the first protection bandwidth is used for determining L resource blocks, and/or the first indication information indicates L resource blocks, wherein L is a positive integer.

8. The method of claim 7, wherein the step of determining the position of the probe is performed,

the first terminal receives the first indication information on the N resource blocks.

9. The method according to claim 7 or 8, characterized in that the first indication information is carried in a physical side uplink broadcast channel PSBCH, or in radio resource control, RRC, signaling, or in a medium access control, MAC, control element, CE, or in side uplink control information, SCI.

10. The method according to any one of claims 6-9, further comprising:

the first terminal sends second indication information to the second terminal on the N resource blocks, wherein the second indication information is used for indicating a second protection bandwidth, the second protection bandwidth is used for determining M resource blocks, and/or the second indication information is used for indicating the M resource blocks.

11. The method according to claim 10, characterized in that the second indication information is carried on the first side-link synchronization information, or in a physical side-link broadcast channel PSBCH, or in radio resource control RRC signaling, or on a medium access control MAC control element CE, or on side-link control information SCI.

12. The method according to any one of claims 8-11, wherein the first indication information or the second indication information is carried by X bits, wherein the value of X is a positive integer, and the X is related to at least one of a configured guard bandwidth, a number of resource sets of a resource pool, and a subcarrier spacing.

13. The method of any one of claims 1-4, 6-12, wherein the method further comprises:

Mode 1: and the first terminal determines to send second sidestream information to the second terminal on Y resource blocks according to the first indication information, wherein the value of Y is the smaller one of the M value and the L value, or the Y resource blocks are intersections of the M resource blocks and the L resource blocks, and the second sidestream information comprises sidestream data.

14. The method of any one of claims 1-4, 6-12, wherein the method further comprises:

mode 2: and the first terminal sends second sidestream information to the second terminal on the M resource blocks, wherein the second sidestream information comprises sidestream data.

15. The method according to claim 13 or 14, characterized in that the method further comprises:

receiving third indication information from the network device; or,

and sending third indication information to the second terminal, wherein the third indication information is used for indicating that the resource allocation mode corresponding to the second sidestream information is mode 1 or mode 2.

16. A method for determining resources of an unlicensed spectrum, the method comprising:

the second terminal determines a second staggered resource block set, wherein the second staggered resource block set comprises L resource blocks;

Determining N resource blocks, wherein the N resource blocks belong to the L resource blocks, N and L are positive integers, and the value of N is smaller than that of L;

and receiving first side line information from the first terminal on the N resource blocks.

17. The method of claim 16, wherein the N resource blocks are the N resource blocks with the smallest or largest index among the L resource blocks, or comprise the N resource blocks located in the middle of the L resource blocks.

18. The method according to claim 16 or 17, wherein the first sidestream information comprises sidestream control information and/or sidestream data information.

19. The method of any of claims 16-18, wherein the first side-line information comprises first side-line synchronization information.

20. The method of claim 19, wherein the method further comprises:

the second terminal sends first indication information to the first terminal, wherein the first indication information is used for indicating a first protection bandwidth, the first protection bandwidth is used for determining L resource blocks, and/or the first indication information indicates L resource blocks, and L is a positive integer.

21. The method of claim 20, wherein the step of determining the position of the probe is performed,

and the second terminal sends the first indication information on N resource blocks.

22. The method according to any of the claims 19-21, characterized in that the first indication information is carried in a physical side-link broadcast channel PSBCH, or in radio resource control, RRC, signaling, or in a medium access control, MAC, control element, CE, or in side-link control information, SCI.

23. The method according to any one of claims 19-22, further comprising:

the second terminal receives second indication information from the first terminal on the N resource blocks, wherein the second indication information is used for indicating a second protection bandwidth, the second protection bandwidth is used for determining M resource blocks, and/or the second indication information is used for indicating the M resource blocks.

24. The method according to claim 23, characterized in that the second indication information is carried on the first side-link synchronization information, or on the physical side-link broadcast channel PSBCH, or on the radio resource control RRC signaling, or on the medium access control MAC control element CE, or on the side-link control information SCI.

25. The method according to any one of claims 21-24, wherein the first indication information or the second indication information is carried by X bits, wherein the value of X is a positive integer, and the X is related to at least one of a configured guard bandwidth, a number of resource sets of a resource pool, and a subcarrier spacing.

26. The method of any one of claims 16-18, 20-25, wherein the method further comprises:

mode 1: and the second terminal determines to receive second sidestream information from the first terminal on Y resource blocks according to the second indication information, wherein the Y value is the smaller of the M value and the L value, or the Y resource blocks are intersections of the M resource blocks and the L resource blocks, and the second sidestream information comprises sidestream data.

27. The method of any one of claims 16-18, 20-25, wherein the method further comprises:

mode 2: and the second terminal determines to receive second sidestream information from the first terminal on the M resource blocks according to the second indication information, wherein the second sidestream information comprises sidestream data.

28. A communication device for performing the method of any of claims 1 to 15, or 16 to 27.

29. A communication device, the communication device comprising: one or more processors and one or more memories;

the one or more memories are coupled to the one or more processors, the one or more memories being configured to store computer program code comprising computer instructions that, when executed by the one or more processors, cause the communications apparatus to perform the methods of any of claims 1-15 or to perform the methods of any of claims 16-27.

30. A computer readable storage medium having stored therein computer executable instructions which when invoked by the computer are for causing the computer to perform the method of any of the preceding claims 1-15 or to perform the method of any of the claims 16-27.