WO2023133834A1

WO2023133834A1 - Wireless communication method and communication device

Info

Publication number: WO2023133834A1
Application number: PCT/CN2022/072113
Authority: WO
Inventors: 赵振山; 林晖闵; 张世昌; 丁伊; 马腾
Original assignee: Oppo广东移动通信有限公司
Priority date: 2022-01-14
Filing date: 2022-01-14
Publication date: 2023-07-20

Abstract

Embodiments of the present application provide a wireless communication method and a communication device. The method comprises: determining at least one resource block set belonging to a resource pool within a first time range; and determining a first channel busy ratio (CBR) on the basis of a received signal strength indicator (RSSI) obtained by measuring interlaces in the at least one resource block set. The method provided in the present application improves the solution of SL RSSI measurement of resources for sidelink transmission in an SL-U system, truly reflects the degree of congestion in the resources for sidelink transmission on the basis of the determined CBR, and improves a congestion control mechanism based on a CBR and a CR in the SL-U system.

Description

Wireless communication method and communication device

technical field

The embodiments of the present application relate to the communication field, and more specifically, to a wireless communication method and a communication device.

Background technique

For the transmission technology of the sidelink, the user equipment (User Equipment, UE) can perform the sidelink reception signal on the transmission resources of each subchannel on each time slot in the resource pool according to the pre-configuration information or the configuration information of the network equipment. Strength indication (Received Signal Strength Indication, RSSI) measurement to obtain channel busy rate (Channel Busy Ratio, CBR). In addition, the user equipment can measure a channel occupancy ratio (Channel Occupancy Ratio, CR). CBR and CR are two basic measurements used to support congestion control. Specifically, when the UE independently selects resources, within a resource pool, the congestion control process based on CBR and CR will limit the physical sidelink control channel (Physical Sidelink Control Channel, PSCCH) and/or physical sidelink shared channel (Physical Sidelink Shared Channel, PSSCH) transmission parameters to avoid channel congestion.

However, when the sidelink communication works in the unlicensed frequency band, some regional regulations stipulate that any sidelink signal sent by the terminal equipment needs to occupy more than X% of the channel bandwidth in the frequency domain, for example, X=80, otherwise, work in the same Terminal devices on unlicensed frequency bands may perform channel monitoring on the occupied time-frequency resources, and consider that the occupied time-frequency resources meet the resource selection conditions, which will eventually lead to multiple terminal devices operating on the same time-frequency resource. Signals are sent on resources, causing serious mutual interference. In addition, in order to avoid excessive transmission power on certain physical resource blocks (PRBs), regulations in some regions limit the maximum transmission power of terminal equipment per MHz. Based on this, in order to improve terminal equipment The transmit power, the terminal device needs to expand the transmit bandwidth as much as possible. However, since the Physical Sidelink Control Channel (PSCCH) and the Physical Sidelink Shared Channel (PSSCH) only occupy multiple consecutive PRBs in the frequency domain, this design method cannot guarantee the occupied frequency The domain bandwidth is always greater than X% of the channel bandwidth, and the transmission power requirement cannot be guaranteed, so the subchannel-based resource pool may not be applicable to sidelink communication on unlicensed frequency bands. That is to say, the congestion control mechanism based on CBR and CR in the SL system is not suitable for the SL-U system.

Therefore, there is an urgent need in the art for a wireless communication method to improve the congestion control mechanism based on CBR and CR in the SL-U system.

Contents of the invention

The embodiment of the present application provides a wireless communication method and communication equipment, which not only improves the SL RSSI measurement scheme for sidelink transmission resources in the SL-U system, but also can truly reflect the sidelink transmission resources based on the determined CBR. The degree of congestion is improved, and the congestion control mechanism based on CBR and CR in the SL-U system is perfected.

In a first aspect, a wireless communication method is provided, including:

determining at least one resource block set belonging to the resource pool within the first time range;

Determine a first channel busy rate CBR based on a received signal strength indicator (RSSI) obtained by measuring comb teeth in the at least one resource block set.

In a second aspect, the present application provides a communication device configured to execute the method in the above first aspect or various implementations thereof. Specifically, the communications device includes a functional module configured to execute the method in the foregoing first aspect or its various implementation manners.

In one implementation manner, the communications device may include a processing unit configured to perform functions related to information processing. For example, the processing unit may be a processor.

In an implementation manner, the communication device may include a sending unit and/or a receiving unit. The sending unit is used to perform functions related to sending, and the receiving unit is used to perform functions related to receiving. For example, the sending unit may be a transmitter or transmitter, and the receiving unit may be a receiver or receiver. For another example, the communication device is a communication chip, the sending unit may be an input circuit or interface of the communication chip, and the sending unit may be an output circuit or interface of the communication chip.

In a third aspect, the present application provides a communication device, including a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, so as to execute the method in the above first aspect or each implementation manner thereof.

In an implementation manner, there are one or more processors, and one or more memories.

In an implementation manner, the memory may be integrated with the processor, or the memory may be separated from the processor.

In one implementation, the communication device further includes a transmitter (transmitter) and a receiver (receiver).

In a fourth aspect, the present application provides a chip configured to implement the method in the above-mentioned first aspect or various implementation manners thereof. Specifically, the chip includes: a processor, configured to invoke and run a computer program from a memory, so that a device installed with the chip executes the method in the above first aspect or its various implementations.

In a fifth aspect, the present application provides a computer-readable storage medium for storing a computer program, and the computer program causes a computer to execute the method in the above-mentioned first aspect or various implementations thereof.

In a sixth aspect, the present application provides a computer program product, including computer program instructions, where the computer program instructions cause a computer to execute the method in the above first aspect or various implementations thereof.

In a seventh aspect, the present application provides a computer program, which, when run on a computer, causes the computer to execute the method in the above first aspect or its implementations.

Based on the above technical solution, at least one resource block set belonging to the resource pool within the first time range is designed as a comb structure, and the first CBR is determined based on the RSSI obtained by measuring the comb teeth in the at least one resource block set, It not only improves the SL RSSI measurement scheme for sidelink transmission resources in the SL-U system, but also can truly reflect the congestion degree in the sidelink transmission resources based on the determined CBR, and improves the SL-U system based on CBR and CR. congestion control mechanism.

Description of drawings

Figures 1 to 7 are examples of scenarios provided in this application.

Fig. 8 is a schematic diagram of a lateral feedback provided by the present application.

FIG. 9 is an example of a time slot structure not including a PSFCH channel provided by an embodiment of the present application.

FIG. 10 is an example of a time slot structure including a PSFCH channel provided by an embodiment of the present application.

FIG. 11 is an example of comb-based transmission resources provided by the embodiment of the present application.

FIG. 12 and FIG. 13 are schematic diagrams of a comb-based frame structure provided by an embodiment of the present application.

FIG. 14 is a schematic diagram of an LBT subband provided by an embodiment of the present application.

Fig. 15 is a schematic diagram of a correspondence between BWPs and resource block sets provided by the embodiment of the present application.

FIG. 16 is an example of a resource pool configured on an unlicensed spectrum provided by an embodiment of the present application.

Fig. 17 is a schematic flowchart of a wireless communication method provided by an embodiment of the present application.

FIG. 18 is a schematic diagram of a resource pool shared by multiple RATs provided by an embodiment of the present application.

FIG. 19 to FIG. 21 are schematic diagrams of determining the first CBR based on the comb teeth in at least one resource block set provided by the embodiments of the present application.

Fig. 22 is a schematic block diagram of a communication device provided by an embodiment of the present application.

Fig. 23 is another schematic block diagram of a communication device provided by an embodiment of the present application.

Fig. 24 is a schematic block diagram of a chip provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

The embodiments of the present application may be applicable to any terminal device-to-terminal device communication framework. For example, Vehicle to Vehicle (V2V), Vehicle to Everything (V2X), Device to Device (D2D), etc. Wherein, the terminal device in this application may be any device or device configured with a physical layer and a media access control layer, and the terminal device may also be called an access terminal. For example, user equipment (User Equipment, UE), subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a wireless Handheld devices with communication capabilities, computing devices or other linear processing devices connected to wireless modems, in-vehicle devices, wearable devices, etc. The embodiment of the present invention is described by taking a vehicle-mounted terminal as an example, but it is not limited thereto.

The technical solution of the embodiment of the present application can be applied to various communication systems, such as: Global System of Mobile communication (Global System of Mobile communication, GSM) system, code division multiple access (Code Division Multiple Access, CDMA) system, broadband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced long term evolution (LTE-A) system , New Radio (NR) system, evolution system of NR system, LTE (LTE-based access to unlicensed spectrum, LTE-U) system on unlicensed spectrum, NR (NR-based access to unlicensed spectrum) on unlicensed spectrum unlicensed spectrum (NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunications System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (Wireless Fidelity, WiFi), fifth-generation communication (5th-Generation, 5G) system or other communication systems, etc.

Generally speaking, the number of connections supported by traditional communication systems is limited and easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication, but also support, for example, Device to Device (Device to Device, D2D) communication, Machine to Machine (M2M) communication, Machine Type Communication (MTC), Vehicle to Vehicle (V2V) communication, or Vehicle to everything (V2X) communication, etc. , the embodiments of the present application may also be applied to these communication systems.

Optionally, the communication system of the present application may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, may also be applied to a dual connectivity (Dual Connectivity, DC) scenario, and may also be applied to an independent (Standalone, SA) network deployment scenario.

Optionally, the communication system of the present application can be applied to unlicensed spectrum, wherein the unlicensed spectrum can also be considered as shared spectrum; or, the communication system of the present application can also be applied to licensed spectrum, wherein the licensed spectrum can also be considered as unlicensed spectrum Shared spectrum.

The embodiments of the present application describe various embodiments in conjunction with network equipment and terminal equipment, wherein the terminal equipment may also be referred to as user equipment (User Equipment, UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.

The terminal device can be a station (STATION, ST) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (Personal Digital Assistant, PDA) devices, handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, next-generation communication systems such as terminal devices in NR networks, or future Terminal equipment in the evolved public land mobile network (Public Land Mobile Network, PLMN) network, etc.

In this application, terminal equipment can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as aircraft, balloons and satellites, etc.) .

In this application, the terminal device can be a mobile phone (Mobile Phone), a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (Virtual Reality, VR) terminal device, an augmented reality (Augmented Reality, AR) terminal device, an industrial Wireless terminal equipment in industrial control, wireless terminal equipment in self-driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid, transportation Wireless terminal devices in transportation safety, wireless terminal devices in smart city or wireless terminal devices in smart home, etc.

As an example but not a limitation, in this application, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices, which is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not only a hardware device, but also achieve powerful functions through software support, data interaction, and cloud interaction. Generalized wearable smart devices include full-featured, large-sized, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, etc., and only focus on a certain type of application functions, and need to cooperate with other devices such as smart phones Use, such as various smart bracelets and smart jewelry for physical sign monitoring.

In this application, the network device can be a device used to communicate with the mobile device, and the network device can be an access point (Access Point, AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA, or It is a base station (NodeB, NB) in WCDMA, or an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or a network in a vehicle-mounted device, a wearable device, and an NR network Equipment or a base station (gNB) or network equipment in a future evolved PLMN network or network equipment in an NTN network.

As an example but not a limitation, in this application, the network device may have a mobile feature, for example, the network device may be a mobile device. Optionally, the network equipment may be a satellite or a balloon station. For example, the satellite can be a low earth orbit (low earth orbit, LEO) satellite, a medium earth orbit (medium earth orbit, MEO) satellite, a geosynchronous earth orbit (geosynchronous earth orbit, GEO) satellite, a high elliptical orbit (High Elliptical Orbit, HEO) satellite. ) Satellite etc. Optionally, the network device may also be a base station installed on land, water, and other locations.

In this application, a network device may provide services for a cell, and a terminal device communicates with the network device through the transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell, and the cell may be a network device (such as a base station) The corresponding cell, the cell can belong to the macro base station, or the base station corresponding to the small cell (Small cell), where the small cell can include: Metro cell, Micro cell, Pico cell , Femto cell, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" in this article is just an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B can mean: A exists alone, A and B exist simultaneously, and there exists alone B these three situations. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

The terms used in the embodiments of the present application are only used to explain specific embodiments of the present application, and are not intended to limit the present application. The terms "first", "second", "third" and "fourth" in the specification and claims of the present application and the drawings are used to distinguish different objects, rather than to describe a specific order . Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion.

It should be understood that the "indication" mentioned in the embodiments of the present application may be a direct indication, may also be an indirect indication, and may also mean that there is an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation.

In the description of the embodiments of the present application, the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or that there is an association between the two, or that it indicates and is indicated, configuration and is configuration etc.

In this application, "predefinition" can be realized by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in devices (for example, including terminal devices and network devices). Do limited. For example, pre-defined may refer to defined in the protocol.

In this application, the "protocol" may refer to a standard protocol in the communication field, for example, it may include LTE protocol, NR protocol and related protocols applied in future communication systems, which is not limited in this application.

For side communication, according to the network coverage of the communicating terminal, side communication can be divided into network coverage inner communication, partial network coverage side communication and network coverage outer communication.

Fig. 1 to Fig. 5 are the system frameworks of the vehicle-mounted terminal to the vehicle-mounted terminal provided by the present application.

As shown in Figure 1, in the inline communication within the network coverage, all terminals (including terminal 1 and terminal 2) performing sideline communication are within the coverage of the network equipment, so all terminals can receive the configuration of the network equipment. Signaling, sidelink communication based on the same sidelink configuration.

As shown in Figure 2, in the case of partial network coverage for lateral communication, some terminals performing lateral communication are located within the coverage of network equipment, and these terminals (ie, terminal 1) can receive configuration signaling from network equipment, and Sidewalk communication is performed according to the configuration of the network device. The terminal outside the network coverage (i.e. terminal 2) cannot receive the configuration signaling of the network equipment. In this case, the terminal outside the network coverage will The information carried in the sidelink broadcast channel (Physical Sidelink BroadcastChannel, PSBCH) sent by the terminal in the terminal determines the sidelink configuration and performs sidelink communication.

As shown in Figure 3, for network coverage outer communication, all terminals (including terminal 1 and terminal 2) performing side communication are located outside the network coverage, and all terminals perform side communication according to the side communication configuration determined by the pre-configuration information. communication.

As shown in Figure 4, for side communication with a central control node, multiple terminals (including terminal 1, terminal 2, and terminal 3) form a communication group, and the communication group has a central control node and can become a group leader Terminal (Cluster Header, CH), the central control node has one of the following functions: responsible for the establishment of communication groups; joining and leaving of group members; performing resource coordination, allocating sideline transmission resources for other terminals, and receiving sideline transmission resources of other terminals. Feedback information; resource coordination with other communication groups and other functions. For example, terminal 1 shown in FIG. 4 is the central control node in the communication group formed by terminal 1 , terminal 2 and terminal 3 .

Device-to-device communication is a sidelink (Sidelink, SL) transmission technology based on D2D. Unlike the traditional cellular system in which communication data is received or sent through network devices, the Internet of Vehicles system uses terminal-to-device direct communication. way, so it has higher spectral efficiency and lower transmission delay. Two transmission modes are defined in 3GPP: first mode and second mode.

First mode:

The transmission resources of the terminal are allocated by the network equipment, and the terminal sends data on the sidelink according to the resources allocated by the network equipment; the network equipment can allocate resources for a single transmission to the terminal, and can also allocate semi-static transmission resources for the terminal resource. As shown in FIG. 1 , the terminal is located within the coverage of the network, and the network allocates transmission resources for sidelink transmission to the terminal.

Second mode:

The terminal selects a resource from the resource pool for data transmission. As shown in Figure 3, the terminal is located outside the coverage area of the cell, and the terminal independently selects transmission resources from the pre-configured resource pool for sidelink transmission; or as shown in Figure 1, the terminal independently selects transmission resources for sidelink transmission from the resource pool configured by the network transmission.

In the new air interface (New Radio, NR) vehicle to other equipment (Vehicle to Everything, V2X), it is necessary to support automatic driving, so higher requirements are put forward for data interaction between vehicles, such as higher throughput, lower Delay, higher reliability, larger coverage, more flexible resource allocation, etc.

In LTE-V2X, broadcast transmission is supported, and in NR-V2X, unicast and multicast transmission are introduced.

For unicast transmission, there is only one terminal at the receiving end. Fig. 5 is a schematic diagram of unicast transmission provided by this application. As shown in FIG. 5 , unicast transmission is performed between terminal 1 and terminal 2 .

For multicast transmission, its receivers are all terminals in a communication group, or all terminals within a certain transmission distance. Fig. 6 is a schematic diagram of multicast transmission provided by this application. As shown in FIG. 6 , terminal 1, terminal 2, terminal 3 and terminal 4 form a communication group, wherein terminal 1 sends data, and other terminal devices in the group are receiving terminals.

For the broadcast transmission mode, the receiving end is any terminal around the sending end terminal. Fig. 7 is a schematic diagram of broadcast transmission provided by the present application. As shown in FIG. 7 , terminal 1 is a transmitting terminal, and other terminals around it, terminal 2 to terminal 6 are all receiving terminals.

To facilitate a better understanding of the embodiments of the present application, the sidelink feedback channel related to the present application will be described.

In NR-V2X, in order to improve reliability, a sidelink feedback channel is introduced.

As shown in Figure 8, for unicast transmission, the sending terminal sends sidelink data (including Physical Sidelink Control Channel (PSCCH) and Physical Sidelink Shared Channel (PSSCH) to the receiving terminal. )), the receiving terminal sends a Hybrid Automatic Repeat reQuest (HARQ) feedback information (including an Acknowledgment (ACK) or a Negative Acknowledgment (NACK)) to the transmitting terminal, and the transmitting terminal according to The feedback information of the terminal at the receiving end determines whether retransmission is required. Wherein, the HARQ feedback information is carried in a sidelink feedback channel, such as PSFCH.

Exemplarily, the sidelink feedback may be activated or deactivated through pre-configuration information or network configuration information, or the sidelink feedback may be activated or deactivated through the transmitting end terminal. If the sidelink feedback is activated, the receiving terminal receives the sidelink data sent by the transmitting terminal, and feeds back ACK or NACK to the transmitting terminal according to the detection result, and the transmitting terminal decides to send retransmission data or new data according to the feedback information of the receiving terminal; If the sidelink feedback is deactivated, the receiving terminal does not need to send feedback information, and the transmitting terminal usually sends data in the form of blind retransmission. For example, the transmitting terminal repeats sending K times for each sidelink data, instead of receiving The end-terminal feedback information determines whether to send retransmission data.

The time slot structure in NR-V2X will be described below with reference to FIG. 9 and FIG. 10 .

FIG. 9 is an example of a time slot structure not including a PSFCH channel provided by an embodiment of the present application; FIG. 10 is an example of a time slot structure including a PSFCH channel provided by an embodiment of this application.

As shown in Figure 9 or Figure 10, within a time slot, the first OFDM symbol is fixed for automatic gain control (Automatic Gain Control, AGC), and on the AGC symbol, the UE replicates the information sent on the second symbol. The last symbol has a guard interval (GuardPeriod, GP) of one symbol, which is used for the UE to switch from the sending state to the receiving state, or from the receiving state to the sending state. PSCCH can occupy two or three OFDM symbols. In the frequency domain, the starting positions of PSCCH and PSSCH in the frequency domain are the same. If the number of PRBs occupied by PSCCH is less than the number of PRBs occupied by PSSCH, the OFDM symbol where PSCCH is located , PSCCH can be frequency division multiplexed with PSSCH.

In other words, in a slot, the PSCCH starts from the second side row symbol of the slot in the time domain and occupies 2 or 3 OFDM symbols, and can occupy {10,12 15,20,25 } PRBs. In order to reduce the complexity of the UE's blind detection of the PSCCH, only one number of PSCCH symbols and one number of PRBs are allowed to be configured in one resource pool. In addition, because the sub-channel is the minimum granularity of PSSCH resource allocation in NR-V2X, the number of PRBs occupied by PSCCH must be less than or equal to the number of PRBs contained in a sub-channel in the resource pool, so as not to select or Allocation creates additional constraints. In the time domain, the PSSCH also starts from the second side row symbol of the time slot, the last time domain symbol in the time slot is a guard interval (GP) symbol, and the remaining symbols are mapped to the PSSCH. The first side row symbol in this time slot is the repetition of the second side row symbol. Usually, the receiving terminal uses the first side row symbol as an AGC (Automatic Gain Control, Automatic Gain Control) symbol. Data is generally not used for data demodulation. The PSSCH occupies Q subchannels in the frequency domain, and each subchannel includes D consecutive PRBs, where Q and D are positive integers.

In NR-V2X, PSFCH resources are configured periodically. If PSFCH resources exist in a slot, PSFCH is located in the penultimate OFDM symbol in the slot. Due to the received power of UE on the OFDM symbol where PSFCH is located It may change, and the penultimate symbol in the slot will also be used for PSFCH transmission to assist the receiving UE in AGC adjustment. In addition, the UE that transmits PSSCH may be different from the UE that transmits PSFCH. Therefore, in the two PSFCH symbols Before, an additional symbol needs to be added for the sending and receiving conversion of the UE.

As shown in Fig. 9, the PSFCH channel may not be included in the time slot.

As shown in FIG. 10 , when a time slot includes a PSFCH channel, the second-to-last and third-to-last symbols in the time slot are used for PSFCH channel transmission, and a time-domain symbol before the PSFCH channel is used as a GP symbol.

The unlicensed spectrum is the spectrum allocated by the country and region that can be used for radio device communication. This spectrum is usually considered a shared spectrum, that is, communication devices in different communication systems can be used as long as they meet the regulatory requirements set by the country or region on the spectrum. To use this spectrum, there is no need to apply to the government for exclusive spectrum authorization.

In order to allow various communication systems that use unlicensed spectrum for wireless communication to coexist friendly on this spectrum, some countries or regions have stipulated regulatory requirements that must be met when using unlicensed spectrum. For example, communication equipment follows the principle of "Listen Before Talk (LBT)", that is, before the communication equipment transmits signals on the channel of the unlicensed spectrum, it needs to perform channel detection first, and only when the channel detection result is that the channel The communication device can only send signals when it is idle; if the channel detection result of the communication device on an unlicensed spectrum channel shows that the channel is busy, the communication device cannot send signals. In order to ensure fairness, in a transmission, the duration of signal transmission by the communication device using the channel of the unlicensed spectrum cannot exceed the Maximum Channel Occupancy Time (MCOT).

This application studies the sidewalk transmission system based on unlicensed spectrum (called SL-U system). Communication on unlicensed frequency bands usually needs to meet the corresponding regulatory requirements. For example, if the terminal wants to use unlicensed frequency bands for communication , the frequency band occupied by the terminal needs to be greater than or equal to 80% of the system bandwidth. Therefore, in order to allow as many users as possible to access channels within the same time period, this application introduces a resource allocation method based on interlace. A comb tooth includes N RBs, and a total of M comb teeth are included in the frequency band. The mth comb tooth includes {m, M+m, 2M+m, 3M+m,...}, for a certain comb The tooth index, which includes multiple resource blocks in the comb, is called an Interlaced Resource Block (IRB). The number of resource blocks separated by two consecutive comb resource blocks in one comb is fixed at M, where the specific value of M is determined by the subcarrier spacing. For 15KHz subcarrier spacing, M is 10; and for 30KHz subcarrier spacing, M is 5. Likewise, M comb teeth can be orthogonally multiplexed in the frequency domain, and the indices of their comb teeth are 0 to M-1. .

It should be noted that the combs, comb resources, or comb indexes described in the embodiments of the present application may be replaced with each other, which is not limited in the embodiments of the present application. For example, one comb tooth includes multiple RBs, it can be replaced by one comb tooth resource including multiple RBs, or one comb tooth index including multiple RBs

As shown in Figure 11, assuming that the system bandwidth includes 30 RBs, the 30 RBs can also be divided into 5 combs, that is, M=5, and the distance between two adjacent RBs in one comb is 5 RBs, each Comb teeth may include 6 RBs.

If the comb-based resource allocation granularity is adopted, channels such as PSCCH and PSSCH in the SL-U system are all based on the comb structure. Optionally, the PSFCH channel is also based on the comb structure.

Figure 12 and Figure 13 are schematic diagrams of comb-based frame structures provided by the embodiments of the present application. Figure 12 is a schematic diagram of a frame structure that includes only PSCCH and PSSCH in a time slot and does not include PSFCH; Figure 13 is a schematic diagram of a time slot that includes PSCCH, Schematic diagram of the frame structure of PSSCH and PSFCH. It should be understood that the system bandwidth in the figure includes 20 RBs, and 5 combs are configured, that is, M=5, and each comb includes 4 RBs, where the numbers on the left indicate the index of the RB, and the numbers on the right indicate the index of the comb .

As shown in Figure 12, for a frame structure that does not include PSFCH, the system configures PSCCH to occupy one comb, and the time domain to occupy two OFDM symbols. The same data on the second time domain symbol in the slot, usually used as AGC, and the last symbol is the GP symbol. For example, PSSCH1 occupies comb tooth 0 and comb tooth 1, and its corresponding PSCCH1 occupies comb tooth 0, that is, the starting positions in the frequency domain of PSCCH1 and the PSSCH1 scheduled by the PSCCH1 are the same. For another example, PSSCH2 occupies comb 2, and its corresponding PSCCH2 also occupies comb 2. As shown in Figure 13, corresponding to the time slot structure including PSFCH resources, one PSFCH occupies one comb tooth, such as PSFCH0 occupies comb tooth 0, and occupies two time domain symbols in the time domain, wherein, the data transmitted on the two time domain symbols The data is the same, for example, the data on the first symbol is a repetition of the data on the second symbol, or, the data on the second symbol is a repetition of the data on the first symbol, and when the first symbol occupied by PSFCH A symbol before the domain symbol is a GP symbol, and a symbol after the last time domain symbol occupied by PSFCH is a GP symbol. Additionally, the data on the first time domain symbol shown in Figures 12 and 13 may be a repetition of the data on the second symbol, which is typically used as the AGC.

It should be noted that Fig. 12 and Fig. 13 are only examples of the present application and should not be construed as limiting the present application. For example, in other alternative embodiments, the frame structure shown may also involve the second-order side The resources occupied by Sidelink Control Information (SCI) and the resources occupied by PSCCH demodulation reference signal (Demodulation Reference Signal, DMRS) and PSSCH DMRS.

In order to facilitate understanding of the solution of this application, the NR-based access to Unlicensed spectrum (NR-U) resource block set (Resource Block Set, RB set) is described below.

In the NR-U system, each transmission is based on a granularity of 20MHz bandwidth due to the requirements of the use of unlicensed spectrum. The design of NR has taken into account large bandwidth and high throughput transmission, so the transmission of NR in the unlicensed spectrum should not be limited to a 20M bandwidth for transmission, so larger bandwidth transmission needs to be supported in NR-U, here is more Large bandwidth refers to the order of magnitude of several times of 20MHz.

The UE can be configured with a large bandwidth BWP, which covers multiple 20MHz channel bandwidths. These 20MHz bandwidths are called LBT subbands in the early design of NR-U, and there are guard bands between subbands and subbands. The role of the guard band is to prevent interference between sub-bands due to out-of-band power leakage. The interference here is that UE transmits on a subband, and interferes with transmissions of other UEs or even transmissions of other system equipment on subbands adjacent to the subband. Such interference is called inter-subband interference.

As shown in FIG. 14 , a 60MHz BWP covers three 20MHz channel bandwidths, and these three 20MHz bandwidths may be called LBT subband 1, LBT subband 2, and LBT subband 3. A guard band is set between the LBT sub-band 1 and the LBT sub-band 2 and between the LBT sub-band 2 and the LBT sub-band 3 .

Further, the LBT subbands are also collectively referred to as a resource block set (resource block set). The resource block set and interval guard band configuration method is that the base station first configures a carrier bandwidth on the common resource block grid (CRB) and configures one or more guard bands in the cell within the carrier bandwidth. The configuration includes the CRB position of the starting point and the length of the guard band. After the configuration is completed, the entire carrier bandwidth is divided into multiple resource block sets. Finally, the network configures the BWP, and then maps the resource block set to the BWP. It is worth noting that the 3GPP protocol requires that the BWP configured by the network must include an integer number of resource block sets.

As shown in FIG. 15 , the BWP configured by the network includes two resource block sets, that is, resource block set 1 and resource block set 2 .

The resource block set in the Sidelink-Unlicensed (SL-U) system will be described below.

In some embodiments, the SL-U system can configure a resource pool on an unlicensed spectrum or a shared spectrum through pre-configuration information or network configuration information, and the resource pool can be used for sidelink transmission. In some implementations, the resource pool includes M1 resource block sets (Resource Block Set, RBset), wherein one resource block set includes M2 resource blocks (ResourceBlock, RB), and M1 and M2 are positive integers. In some implementations, a resource block set corresponds to a channel in the unlicensed spectrum (or shared spectrum), or a resource block set corresponds to the minimum frequency domain granularity for LBT, or a resource block set corresponds to an LBT subband .

For example, the bandwidth corresponding to a channel on an unlicensed spectrum is 20MHz, that is, the bandwidth corresponding to a set of resource blocks is also 20MHz. Or, the bandwidth of a channel on an unlicensed spectrum is 20MHz, corresponding to M3 RBs, and the M3 RBs are all RBs included in a channel, or all RBs available for data transmission in a channel, such as M3=100 (corresponding to 15kHz subcarrier spacing), then one RB set also corresponds to 100 RBs, that is, M2=100.

For another example, on the unlicensed spectrum, it is necessary to judge whether the unlicensed spectrum can be used based on the result of LBT. The minimum frequency domain granularity for LBT is 20MHz, and a resource block set corresponds to the number of RBs included in 20MHz. Or one resource block set includes M2=100 RBs (corresponding to 15kHz subcarrier spacing), and the minimum frequency domain granularity of LBT is one resource block set, that is, 100 RBs.

It should be noted that, in the embodiment of the present application, the set of resource blocks may also be called a channel or an LBT subband, which is not limited in the embodiment of the present application.

In some implementation manners, the starting position in the frequency domain of the resource pool is the same as the starting position in the frequency domain of the first resource block set in the M1 resource block sets, where the first resource block set may be A resource block set with the lowest frequency domain position among the M1 resource block sets. In some implementation manners, the frequency domain end position of the resource pool is the same as the frequency domain end position of the second resource block set in the M1 resource block sets, wherein the second resource block set may be the A resource block set with the highest frequency domain position among the M1 resource block sets.

As shown in Figure 16, it is assumed that the resource pool includes M1=3 resource block sets, and the indexes of the corresponding resource block sets are respectively resource block set 0, resource block set 1 and resource block set 2, wherein resource block set 0 The frequency domain position of resource block set 2 is the lowest, and the frequency domain position of resource block set 2 is the highest. Therefore, the frequency domain start position of the resource pool is the same as the frequency domain start position of resource block set 0, or the frequency domain start position of the resource pool Determined according to the start position of the frequency domain of resource block set 0; the end position of the frequency domain of the resource pool is the same as the end position of the frequency domain of resource block set 2, or the end position of the frequency domain of the resource pool is based on the frequency domain of resource block set 2 The end position is determined.

In some implementation manners, among the M1 resource block sets included in the resource pool, there is a guard band (Guard Band, GB) between two adjacent resource block sets.

In some implementation manners, the frequency domain starting position and the frequency domain size of the guard frequency band may be determined according to preconfiguration information or network configuration information. In other words, the terminal device obtains pre-configuration information or network configuration information, and the pre-configuration information or network configuration information is used to configure a guard band (Guard Band, GB). In some embodiments, guard bands are used to separate resource block sets RBset.

In conjunction with Figure 16, three guard bands are configured in the sideband bandwidth part (BWP), corresponding to guard band 0, guard band 1, and guard band 2, and these three guard bands separate 4 resource blocks Set, according to the frequency domain start position of the side row BWP (that is, the start point of the side row BWP shown in the figure) and the frequency domain start position of each guard band (that is, the start point of the guard band shown in the figure) and the protection The frequency domain size of the frequency band (that is, the length of the guard frequency band shown in the figure) can determine the start position and end position of each resource block set in the frequency domain. Since the resource pool includes three resource block sets, that is, resource block set 0 to resource block set 2, the starting position of the resource pool in the frequency domain (that is, the starting point of the resource pool shown in the figure) corresponds to the resource block set 0 The starting position in the frequency domain of , and the ending position in the frequency domain of the resource pool (ie, the end point of the resource pool shown in the figure) correspond to the ending position in the frequency domain of resource block set 2 .

In some implementations, one resource block set includes multiple combs.

Referring to FIG. 16 , each resource block set in resource block set 0 to resource block set 2 may include multiple combs.

In some embodiments, a PSSCH may be sent in one or more resource block sets. Alternatively, one PSSCH may occupy transmission resources in one or more resource block sets.

In still some implementation manners, one PSSCH may be sent in one or more resource block sets, and the one PSSCH occupies one or more combs in the one or more resource block sets. For example, referring to FIG. 16, the resource pool includes three resource block sets, namely, resource block set 0, resource block set 1, and resource block set 2; further, when the subcarrier spacing is 15kHz, in one resource block The set includes 100 RBs, corresponding to 10 comb teeth, that is, comb tooth 0 to comb tooth 9. One PSSCH can be transmitted in one resource block set, and further, the one PSSCH can occupy part or all of resources corresponding to the comb teeth in one resource block set. For example, PSSCH 1 is sent in resource block set 0, and PSSCH 1 occupies resources corresponding to all combs in resource block set 0, that is, PSSCH 1 occupies resources corresponding to combs 0 to 9 in resource block set 0. PSSCH 2 is sent in resource block set 1, and PSSCH 2 occupies resources corresponding to two combs in resource block set 1, for example, PSSCH 2 occupies resources corresponding to comb 0 and comb 1 in resource block set 1. PSSCH 3 is sent in resource block set 1 and resource block set 2, and PSSCH 3 respectively occupies the resources corresponding to the three combs in the two resource block sets, for example, PSSCH 3 occupies resources in resource block set 1 and resource block set 2 respectively. Comb 3, Comb 4, and Comb 5 resources.

The channel access mode in the NR-U system will be described below.

In NR-U, there are the following LBT (Listen Before Talk) methods:

Type1 LBT method: multi-slot channel detection with random backoff based on contention window size adjustment. According to the channel access priority p, a channel occupation of length T _mcot can be initiated. The base station uses type1 LBT method, except for sending its own For data, the COT can also be shared with the UE. The UE uses the type1 LBT method. In addition to sending its own data, it can also share the COT with the base station. When the terminal performs Type1LBT, different channel access priorities and corresponding parameters can be used. Wherein, different channel priorities may correspond to different channel access parameters.

The channel access priorities and corresponding parameters used by the terminal when performing Type1 LBT are exemplarily described below in conjunction with Table 1.

Table 1

It should be noted that in the above Table 1, m _p refers to the number of back-off slots corresponding to the channel access priority P, CW _p refers to the contention window size corresponding to the channel access priority P, CW _min,p Refers to the minimum value of CW _p corresponding to the channel access priority P, CW _max,p refers to the maximum value of CW _p corresponding to the channel access priority P, T _mcot,p refers to the channel access priority The maximum occupied time length of the channel corresponding to level P. The LBT mode of Type 1 in NR-U includes 4 kinds of channel access priorities, and p=1 is the highest priority.

Type 2 LBT mode: a channel access mode based on fixed-length channel monitoring time slots.

LBT mode of Type2A: channel detection of a single time slot with a fixed length (or fixed duration) of 25us (microseconds), and the channel detection starts 25us before the data starts to be sent. Including a 16us detection and a 9us detection, if the channel is idle, the channel is considered to be idle, and the channel can be accessed.

Type2B LBT mode: channel detection with a fixed length (or fixed duration) of 16us for a single time slot, within the last 9us of detection, if there is more than 4us of idle time, the channel is considered to be idle.

Type2C LBT method: no channel detection, direct transmission, because the time difference between this transmission and the previous transmission is less than 16us, it can be considered as the same transmission, but the transmission length does not exceed 584us.

It should be noted that LBT can also be called channel access. The above-mentioned Type1LBT method, Type2ALBT method, Type2BLBT method, and Type2CLBT method are respectively called Type1 channel access method, Type2A channel access method, and Type2B channel access method. mode, Type2C channel access mode.

The CBR and CR measurements of SL are described below.

Channel Busy Ratio (Channel Busy Ratio, CBR) and Channel Occupancy Ratio (Channel Occupancy Ratio, CR) are two basic measurement quantities used to support congestion control. Among them, the SL CBR measured by slot n is defined as: within the CBR measurement window [nc,n-1], the SL RSSI measurement is performed on the subchannels in the resource pool, and the SL RSSI measurement results are higher than the (pre)configured threshold subchannels The proportion of the total number of sub-channels measured in the measurement window, where c is equal to 100 or 100*2 ^μ slots (SL Channel Busy Ratio (SL CBR) measured in slot n is defined as the portion of sub-channels in the resource pool whose SL RSSI measured by the UE exceeded a(pre-)configured threshold sensed over a CBR measurement window[nc,n-1],wherein a is equal to 100 or 100·2μ slots). When the subcarrier spacing is 15KHz, 30KHz, 60KHz, 120KHz, μ is 0, 1, 2, 3 respectively. The definition of SL CR measured by time slot n is: the number of subchannels that have been used for sidelink transmission in the range of [na,n-1] and the number of authorized subchannels in the range of [n,n+b] The sum accounts for the proportion of the total number of sub-channels belonging to the transmission resource pool in the range [na,n+b] (Sidelink Channel Occupancy Ratio (SL CR) evaluated at slot n is defined as the total number of sub-channels used for its transmissions in slots[na,n-1] and granted in slots[n,n+b]divided by the total number of configured sub-channels in the transmission pool over[na,n+b]). CR can be calculated separately for different priorities. Where a is a positive integer, b is 0 or a positive integer, and the values of a and b are determined by the UE, but the following three conditions need to be met:

1) a+b+1=1000 or 1000*2μ time slots;

2) b<(a+b+1)/2;

3) n+b is the last retransmission of the current transmission indicated by the sideline grant.

In some embodiments, for the UE in the RRC connected state, the CBR should be measured and reported according to the configuration of the gNB. The UE shall perform congestion control based on the measured CBR and CR. For example, when UE independently selects resources, in a resource pool, the congestion control process will limit the transmission parameters of PSCCH/PSSCH to avoid channel congestion.

Considering the congested environment of the same priority service in different channels, and the congested environment of different priority services in the same channel will correspond to different PSSCH transmission parameters, therefore, the upper layer sets up multiple CBR level configurations, and each CBR level configuration Corresponds to multiple CBR levels, and different priorities will correspond to different CBR level configurations. The terminal will determine the CBR level under the corresponding CBR level configuration according to the priority and the measured CBR, and then further correspond to the PSSCH transmission parameters according to the CBR level. The specific sending parameters include:

1) Supported MCS range;

2) The optional range of the number of sub-channels;

3) The maximum number of retransmissions of the PSSCH;

4) Maximum transmit power;

5) CR limit CR _Limit .

Among them, the specific role of the parameter CR _Limit in congestion control is as follows: the sum of the CR corresponding to the side transmission with a priority value not lower than k is less than or equal to the CR _Limit corresponding to the priority k, that is:

∑ _i≥k CR(i)≤CR _Limit (k);

Among them, CR(i) is the CR corresponding to the priority i measured by the UE in the time slot (nN), and the corresponding CR _Limit (k) is the sidelink transmission for the priority k configured by the upper layer and the UE in the time slot (nN). ) is the CR restriction in the PSSCH transmission parameters corresponding to the measured CBR, n represents the PSSCH transmission time slot, N represents the time required for the UE to process congestion control, and has a relationship with μ. For example, 3GPP defines two UE congestion control processing capabilities (processing capability 1 and processing capability 2). Optionally, how the terminal satisfies the above CR restriction is determined by the terminal implementation, and can be satisfied by discarding some PSSCH transmissions.

Table 2

μmu	N处理能力1(单位时隙)N processing capacity 1 (unit time slot)	N处理能力2(单位时隙)N processing capacity 2 (unit time slot)
00	22	22
11	22	44
22	44	88
33	88	1616

As shown in Table 2, for processing capability 1, when μ is 1, N is 2 time slots; for processing capability 2, when μ is 1, N is 4 time slots.

That is to say, for the transmission technology of the sidelink, the user equipment (User Equipment, UE) in the radio resource control (Radio Resource Control, RRC) connection state can configure the resources in the resource pool according to the pre-configuration information or the configuration information of the network equipment. The transmission resources of each sub-channel on each time slot are measured for the Sidelink (Sidelink, SL) Received Signal Strength Indication (RSSI) to obtain the Channel Busy Ratio (CBR). In addition, the user equipment can measure and channel occupancy ratio (Channel Occupancy Ratio, CR). CBR and CR are two basic measurements used to support congestion control. Specifically, when the UE independently selects resources, within a resource pool, the congestion control process based on CBR and CR will limit the physical sidelink control channel (Physical Sidelink Control Channel, PSCCH) and/or physical sidelink shared channel (Physical Sidelink Shared Channel, PSSCH) transmission parameters to avoid channel congestion.

However, when the sidelink communication works in the unlicensed frequency band, some regional regulations stipulate that any sidelink signal sent by the terminal equipment needs to occupy more than X% of the channel bandwidth in the frequency domain, for example, X=80, otherwise, work in the same Terminal devices on unlicensed frequency bands may perform channel monitoring on the occupied time-frequency resources, and consider that the occupied time-frequency resources meet the resource selection conditions, which will eventually lead to multiple terminal devices operating on the same time-frequency resource. Signals are sent on resources, causing serious mutual interference. In addition, in order to avoid excessive transmission power on certain physical resource blocks (PRBs), regulations in some regions limit the maximum transmission power of terminal equipment per MHz. Based on this, in order to improve terminal equipment The transmit power, the terminal device needs to expand the transmit bandwidth as much as possible. However, since the Physical Sidelink Control Channel (PSCCH) and the Physical Sidelink Shared Channel (PSSCH) only occupy multiple consecutive PRBs in the frequency domain, this design method cannot guarantee the occupied frequency The domain bandwidth is always greater than X% of the channel bandwidth, and the transmission power requirement cannot be guaranteed, so it cannot be applied to sidelink communication on unlicensed frequency bands.

In view of this, the embodiment of the present application provides a wireless communication method and communication equipment, which not only improves the SL RSSI measurement scheme for sidelink transmission resources in the SL-U system, but also can reflect the real side information based on the determined CBR. It improves the congestion control mechanism based on CBR and CR in the SL-U system.

FIG. 17 is a schematic flowchart of a wireless communication method 200 provided by an embodiment of the present application. The method 200 may be executed by a communication device. The communication device may be a terminal device, for example, the communication device may be the terminal B mentioned above, or the terminal A mentioned above. The communication device may also be a network device.

As shown in Figure 17, the method 200 may include:

S210. The communication device determines at least one resource block set belonging to the resource pool within the first time range;

S220. The communication device determines a first channel busy rate CBR based on a received signal strength indication (Received Signal Strength Indication, RSSI) obtained by measuring comb teeth in the at least one resource block set.

Exemplarily, when performing RSSI measurement on the subchannels in the at least one resource block set, the SL RSSI may be defined as: starting from the second OFDM, configuring in the OFDM symbols of the time slots configured for PSCCH and PSSCH The linear average of the total received power (in [W]) observed in the comb teeth (Sidelink Received Signal Strength Indicator (SL RSSI) is defined as the linear average of the total received power (in [W]) observed in the configured IRB in OFDM symbols of a slot configured for PSCCH and PSSCH, starting from the 2nd OFDM symbol).

In this embodiment, at least one resource block set belonging to the resource pool within the first time range is designed as a comb structure, and the first CBR is determined based on the RSSI obtained by measuring the combs in the at least one resource block set, It not only improves the CBR measurement scheme for sidelink transmission resources in the SL-U system, but also can truly reflect the congestion degree in the sidelink transmission resources based on the determined CBR, and improves the CBR and CR-based CBR and CR measurement scheme in the SL-U system. Congestion control mechanism.

Certainly, in other alternative embodiments, the communication device may also determine the first channel busy rate CBR based on the received signal strength indicator RSSI obtained by measuring the subchannels in the at least one resource block set. Exemplarily, when performing RSSI measurement on the subchannels in the at least one resource block set, the SL RSSI may be defined as: starting from the second OFDM, configuring in the OFDM symbols of the time slots configured for PSCCH and PSSCH Sidelink Received Signal Strength Indicator (SL RSSI) is defined as the linear average of the total received power (in [W]) observed in the configured sub-channel in OFDM symbols of a slot configured for PSCCH and PSSCH, starting from the 2nd OFDM symbol).

In some implementation manners, the first time range includes [nc,n-1], where c is a parameter determined according to preconfiguration information or network configuration information. Exemplarily, c is equal to 100 or 100*2 ^μ time slots, when the subcarrier spacing is 15KHz, 30KHz, 60KHz, 120KHz, μ is 0, 1, 2, 3 respectively; n represents the time slot for measuring CBR;

Exemplarily, the first time range includes at least one time unit, and the time unit includes but not limited to: a frame, a field frame, a time slot, a symbol, and the like.

Exemplarily, the at least one resource block set includes resource block sets in a part of time units or all time units in the at least one time unit. For example, the resource pool includes resource block set 0 to resource block set 3, and the at least one time unit includes time slot 0 to time slot 10, wherein the at least one resource block set includes resource block set 0 in time slot 1 , resource block set 0 to resource block set 3 in slot 2.

Exemplarily, the at least one resource block set is a resource block set used for RSSI measurement.

Exemplarily, the resource pool may further include resource block sets other than the at least one resource block set.

Exemplarily, the at least one resource block set includes all resource block sets belonging to the resource pool.

Exemplarily, the resource pool may further include time units other than the at least one time unit.

In some embodiments, the S220 may include:

The communication device obtains the comb teeth (or subchannels) whose RSSI measurement results in the at least one resource block set exceed the first threshold value by performing RSSI measurement on the comb teeth (or subchannels) in the at least one resource block set the first quantity of

The communications device determines the first CBR based on the first quantity.

Exemplarily, the communication device may determine the First CBR. For example, the first CBR is the ratio of the first number to the number of comb teeth (or subchannels) measured by the communication device in the at least one resource block set within the first time range; or The first CBR is a ratio of the first number to the number of comb teeth (or sub-channels) measured by the communication device in the at least one resource block set within the first time range. That is to say, the communication device may compare the first number with the number of comb teeth (or subchannels) measured by the communication device in the at least one resource block set within the first time range ratio, determined for the first CBR. Of course, in other alternative embodiments, the comb teeth (or subchannels) whose RSSI measured by the comb teeth (or subchannels) in the at least one resource block set exceed the first threshold value may also be included in the first threshold The proportion occupied by comb teeth (or subchannels) measured in the at least one resource block set within a time range is determined as the first CBR, which is not specifically limited in this embodiment of the present application.

Exemplarily, the communication device may determine the first CBR based on the first number and the number of combs (or sub-channels) measured by the communication device in the resource pool within the first time range. For example, the first CBR is the ratio of the first number to the number of comb teeth (or sub-channels) measured by the communication device in the resource pool within the first time range; or the first CBR is a ratio of the first number to the number of comb teeth (or sub-channels) measured by the communication device in the resource pool within the first time range. That is to say, the communication device may determine the ratio of the first number to the number of comb teeth (or sub-channels) measured by the communication device in the resource pool within the first time range as The first CBR. Of course, in other alternative embodiments, the comb teeth (or sub-channels) whose RSSI measurement results in the at least one resource block set exceed the first threshold value may also be included in the first time range. The proportion occupied by comb teeth (or subchannels) measured in the resource pool is determined as the first CBR, which is not specifically limited in this embodiment of the present application.

In some embodiments, the first threshold value is pre-configured or configured by a network device.

In some embodiments, the S210 may include:

The communication device determines a set of resource blocks used for sidelink transmission within the first time range as the at least one set of resource blocks.

Exemplarily, the resource block set used for sidelink transmission is determined according to the resource block set where the comb (or subchannel) used for sidelink transmission is located. For example, the set of resource blocks used for sidelink transmission includes the set of resource blocks where combs (or sub-channels) used for sidelink transmission are located.

In some embodiments, when the communication device determines the resource block set used for sidelink transmission within the first time range as the at least one resource block set, the communication device determines the set of resource blocks used in the at least one resource block according to all the combs (or sub-channels) in the block set, and determine the combs (or sub-channels) measured by the communication device in the at least one resource block set within the first time range. Exemplarily, the communication device determines all combs (or subchannels) in the at least one resource block set as the communication device being in the at least one resource block set within the first time range The comb (or sub-channel) of the measurement.

Exemplarily, when the communication device determines the resource block set used for sidelink transmission within the first time range as the at least one resource block set, the communication device may set the at least one resource block set Perform RSSI measurement on all combs (or sub-channels) in the at least one resource block set, and obtain a first number of combs (or sub-channels) whose RSSI measurement results in the at least one resource block set exceed a first threshold.

In some embodiments, when the communication device determines the resource block set used for sidelink transmission within the first time range as the at least one resource block set, the communication device determines the set of resource blocks used in the at least one resource block according to The comb teeth (or subchannels) used for sidelink transmission in the block set determine the comb teeth (or subchannels) measured by the communication device in the at least one resource block set within the first time range. Exemplarily, the communication device determines the sidelink transmission comb (or subchannel) in the at least one resource block set as the at least one Combs (or sub-channels) measured within a set of resource blocks.

Exemplarily, when the communication device determines the resource block set used for sidelink transmission within the first time range as the at least one resource block set, the communication device may set the at least one resource block set RSSI measurement is performed on combs (or subchannels) used for sidelink transmission in the at least one resource block set to obtain a first number of combs (or subchannels) whose RSSI measurement results exceed a first threshold in the at least one resource block set.

In some embodiments, the set of resource blocks used for sidelink transmission is determined according to a detection result of a physical sidelink control channel PSCCH within the first time range. Exemplarily, the set of resource blocks used for sidelink transmission is the set of resource blocks indicated by the PSCCH. Specifically, the set of resource blocks used for sidelink transmission is the set of resource blocks indicated by the SCI carried by the PSCCH.

Exemplarily, the PSCCH detection result is the detected PSCCH. That is to say, the resource block set used for sidelink transmission is determined according to the PSCCH detected within the first time range. For example, the set of resource blocks used for sidelink transmission is the set of resource blocks indicated by the PSCCH.

Exemplarily, the resource block set used for sidelink transmission is determined according to the SCI detection result within the first time range. For example, the SCI detection result is the detected SCI carried by the PSCCH. That is to say, the set of resource blocks used for sidelink transmission is determined according to the SCI carried by the PSCCH detected within the first time range. Exemplarily, the set of resource blocks used for sidelink transmission is the set of resource blocks indicated by the SCI carried by the PSCCH detected within the first time range.

In some embodiments, the set of resource blocks used for sidelink transmission includes the set of resource blocks where sidelink transmission resources indicated by the PSCCH detected within the first time range are located.

Exemplarily, the sidelink transmission resources indicated by the PSCCH are comb teeth (or subchannel) resources indicated by the PSCCH for sidelink transmission. That is to say, the set of resource blocks used for sidelink transmission includes the set of resource blocks where the comb tooth (or subchannel) resource for sidelink transmission indicated by the PSCCH detected within the first time range is located.

In some embodiments, the set of resource blocks used for sidelink transmission includes the set of resource blocks where the sidelink transmission resource indicated by the SCI carried by the PSCCH detected within the first time range is located.

Exemplarily, the sidelink transmission resource indicated by the SCI carried by the PSCCH is a comb (or subchannel) resource indicated by the SCI for sidelink transmission. That is to say, the resource block set used for sidelink transmission includes the resource block where the comb tooth (or subchannel) resource for sidelink transmission indicated by the SCI carried by the PSCCH detected within the first time range is located gather.

In some embodiments, the combs (or subchannels) used for sidelink transmission in the at least one resource block set are determined according to the PSCCH detection results in the first time range. Exemplarily, the comb teeth (or subchannels) used for sidelink transmission are the comb teeth (or subchannels) indicated by the PSCCH. Specifically, the comb teeth (or subchannels) used for sidelink transmission are the comb teeth (or subchannels) indicated by the SCI carried by the PSCCH.

Exemplarily, the PSCCH detection result is the detected PSCCH. That is to say, the combs (or subchannels) used for sidelink transmission in the at least one resource block set are determined according to the PSCCH detected in the first time range.

Exemplarily, the comb teeth (or sub-channels) used for sidelink transmission in the at least one resource block set are determined according to the SCI detection result in the first time range. For example, the SCI detection result is the detected SCI carried by the PSCCH. That is to say, the combs (or subchannels) used for sidelink transmission in the at least one resource block set are determined according to the SCI carried by the PSCCH detected within the first time range. Exemplarily, the comb teeth (or subchannels) used for sidelink transmission in the at least one resource block set are the comb teeth (or subchannels) indicated by the SCI carried by the PSCCH detected within the first time range.

In some embodiments, the combs (or subchannels) used for sidelink transmission in the at least one resource block set include the combs where the sidelink transmission resources indicated by the PSCCH detected in the first time range are located. teeth (or sub-channels).

Exemplarily, the sidelink transmission resources indicated by the PSCCH are comb teeth (or subchannel) resources indicated by the PSCCH for sidelink transmission. That is to say, the comb teeth (or subchannels) used for sidelink transmission in the at least one resource block set include the comb teeth (or subchannels) used for sidelink transmission indicated by the PSCCH detected in the first time range ( or subchannel).

In some embodiments, the combs (or subchannels) used for sidelink transmission in the at least one resource block set include sidelink transmission resources indicated by the SCI carried by the PSCCH detected within the first time range The comb (or sub-channel) it is in.

Exemplarily, the sidelink transmission resource indicated by the SCI carried by the PSCCH is a comb (or subchannel) resource indicated by the SCI for sidelink transmission. That is to say, the combs (or subchannels) used for sidelink transmission in the at least one resource block set include the combs (or subchannels) used for sidelink transmission indicated by the SCI carried by the PSCCH detected in the first time range Comb teeth (or sub-channels).

It should be understood that the detected PSCCH indicates a successfully detected PSCCH, that is, the cyclic redundancy check (cyclic redundancy check, CRC) check performed on the SCI carried by the PSCCH is successful.

It should be understood that the detected SCI means a successfully detected SCI, that is, the CRC check performed on the SCI is successful.

In some embodiments, the S210 may include:

The communication device determines a set of resource blocks available for sidelink transmission within the first time range as the at least one set of resource blocks.

Exemplarily, the resource block set available for sidelink transmission is determined according to the resource block set where the comb (or subchannel) available for sidelink transmission is located. For example, the set of resource blocks available for sidelink transmission includes a set of resource blocks where combs (or sub-channels) available for sidelink transmission are located.

In some embodiments, when the communication device determines the set of resource blocks available for sidelink transmission within the first time range as the at least one set of resource blocks, the communication device according to the all the combs (or sub-channels) in the block set, and determine the combs (or sub-channels) measured by the communication device in the at least one resource block set within the first time range. Exemplarily, the communication device determines all combs (or subchannels) in the at least one resource block set as the communication device being in the at least one resource block set within the first time range The comb (or sub-channel) of the measurement.

Exemplarily, when the communication device determines the resource block set available for sidelink transmission within the first time range as the at least one resource block set, the communication device may set the at least one resource block set Perform RSSI measurement on all combs (or sub-channels) in the at least one resource block set, and obtain a first number of combs (or sub-channels) whose RSSI measurement results in the at least one resource block set exceed a first threshold.

In some embodiments, when the communication device determines the set of resource blocks available for sidelink transmission within the first time range as the at least one set of resource blocks, the communication device according to the The comb teeth (or subchannels) available for sidelink transmission in the block set determine the comb teeth (or subchannels) measured by the communication device in the at least one resource block set within the first time range. Exemplarily, the communication device determines the comb teeth (or sub-channels) available for sidelink transmission in the at least one resource block set as the at least one Combs (or sub-channels) measured within a set of resource blocks.

Exemplarily, when the communication device determines the resource block set available for sidelink transmission within the first time range as the at least one resource block set, the communication device may set the at least one resource block set The comb teeth (or sub-channels) that can be used for sidelink transmission are used for RSSI measurement, and the first number of comb teeth (or sub-channels) whose RSSI measurement results exceed the first threshold value in the at least one resource block set is obtained.

In some embodiments, the set of resource blocks available for sidelink transmission is determined according to channel access results of the set of resource blocks in the resource pool.

Exemplarily, the resource block set available for sidelink transmission is determined according to channel access results of all resource block sets in the resource pool.

In some embodiments, the set of resource blocks available for sidelink transmission includes a set of resource blocks successfully accessed when performing channel access to the set of resource blocks in the resource pool within the first time range.

Exemplarily, the set of resource blocks available for sidelink transmission includes a set of resource blocks successfully accessed when performing channel access to all resource block sets in the resource pool within the first time range.

In some embodiments, the method 200 may also include:

Perform channel access to the set of resource blocks in the resource pool within the first time range by using at least one of the following access methods:

Type 1 channel access, type 2 channel access, type 2A channel access, type 2B channel access, type 2C channel access.

Exemplarily, the Type 1 channel access may be the Type 1 LBT mode mentioned above.

Exemplarily, the Type 2 channel access may be the Type 2 LBT mode mentioned above.

Exemplarily, the Type 2A channel access may be the Type 2A LBT mode mentioned above.

Exemplarily, the Type 2B channel access may be the Type 2B LBT mode mentioned above.

Exemplarily, the Type 2C channel access may be the Type 2C LBT mode mentioned above.

Exemplarily, when the communication device is a terminal device, at least one of type 1 channel access, type 2A channel access, and type 2B channel access may be used to control the resources in the resource pool within the first time range. A set of resource blocks performs channel access. Taking type 1 channel access as an example, the terminal device performs type 1 channel access for the first resource block set in the resource pool in the first time unit within the first time range, if the channel access is successful , indicating that the first resource block set in the first time unit can be used for sidelink transmission, or that the first resource block set in the first time unit is not occupied by other RAT terminals; if the channel is connected If the entry is unsuccessful, it means that the first resource block set in the first time unit is occupied by other RAT terminals. That is to say, the terminal device can determine the total number of resources occupied by other RATs according to the channel access result; or determine the total number of resources available for sidelink transmission. Further, the terminal device can perform SL RSSI measurement on each comb (or sub-channel) in the resource block set (or resource block set not occupied by other RATs) that can be used for sidelink transmission, and then can be used for sidelink transmission. The first CBR is calculated from the measurement result of each comb (or sub-channel) in the resource block set for row transmission.

It should be noted that the frequency bands used by the New Radio (NR) Sidelink (SL) transmission system are dedicated frequency bands or licensed frequency bands. Correspondingly, the transmission resources in the resource pool are all transmission resources available to the NRSL system. Resources, that is, they will not be used by other Radio Access Technology (RAT). In addition, when the SL system is deployed on the unlicensed spectrum, the SL-U terminal can access the unlicensed frequency band through the Sidelink-Unlicensed (SL-U) technology. However, since the unlicensed spectrum can be used by many Therefore, even if the resource pool is allocated for the SL-U system on the unlicensed frequency band (that is, the SL-U resource pool is correspondingly configured to include one or more resource block sets, the SL-U terminal performs sidelink transmission resources may be located in one or more resource block sets), there may also be transmissions of other RATs in the resource pool, and the SL CBR/CR measurement does not consider the existence of transmissions of other RATs. In addition, when there are other RAT transmissions in the SL-U system, such as Wireless-Fidelity (Wireless-Fidelity, WiFi) transmission, the WiFi transmission is not based on the slot structure, that is to say, the WiFi transmission can be located in any slot in the slot. The location and duration of occupation are also not fixed. And the transmission of WiFi and SL-U can be time division multiplexing (Time Division Multiplexing, TDM) multiplexing or frequency division multiplexing (Frequency Division Multiplexing, FDM) multiplexing.

As shown in Figure 18, it is assumed that the resource pool includes 3 resource block sets, corresponding to resource block set 0 to resource block set 2; in addition, assuming that the sidelink subcarrier spacing is 30kHz, it can support 5 combs (which can be One resource block set includes 5 combs, or the sideline resource pool or sideline BWP or sideline carrier supports 5 combs). At this time, there may be other RAT transmissions in the resource pool. For example, the resources used for WiFi include resource block set 0 to resource block set 2 in time slot 1, resource block set 2 in time slot 1, and resource block set 2 in time slot 3. Resource block set 1 in time slot 4, resource block set 0 in time slot 5, resource block set 1 and resource block set 2 in time slot 5 and time slot 6. For another example, the resources used for SL-U include resource block set 0 and resource block set 1 in time slot 2, resource block set 2 in time slot 4, resource block set 0 in time slot 7, and resource block set 0 in time slot 8. resource block set 0 to resource block set 2.

In this embodiment of the present application, the resource block set used for sidelink transmission or the resource block set available for sidelink transmission within the first time range is determined as at least one resource block set, and then based on the analysis of the at least one resource block set The first CBR is determined by the RSSI obtained by measuring the comb teeth (or sub-channels) of the SL-U system. Even when there are other RAT transmissions in the frequency band where the SL-U system is located, and the other RAT transmissions are not based on the slot structure, the CBR can be determined normally. , can truly reflect the congestion degree in the sidelink transmission resources, and perfect the congestion control mechanism based on CBR and CR in the SL-U system.

In some embodiments, the first time range is [nc,n-1]; wherein, n represents the time unit for calculating the first CBR, and c is determined according to pre-configuration information or network configuration information. For example, The value of c is equal to 100 or 100*2 ^μ time units, and the value of μ is determined according to the subcarrier spacing.

Exemplarily, when the at least one resource block set is the detected resource block set used for sidelink transmission, the first CBR calculated by the communication device in time slot n is: within [n-c,n-1] The number of comb teeth (or subchannels) whose measured SLRSSI exceeds the first threshold in the detected set of resource blocks used for sidelink transmission, and within [n-c,n-1], in The ratio of the numbers of all combs (or sub-channels) measured in the resource pool. For example, the communication device may determine the resource block sets where all sidelink transmissions detected within [n-c,n-1] are located, and then, the communication device may, for each comb (or subchannel) in these resource block sets ) respectively perform SLRSSI measurement to obtain the first CBR, wherein the first CBR represents the number of comb teeth (or sub-channels) whose measured SLRSSI exceeds the first threshold value, and in [n-c, n-1] The ratio of the number of comb teeth (or sub-channels) measured in all resource block sets in the resource pool.

Exemplarily, when the at least one resource block set is the detected resource block set used for sidelink transmission, the first CBR calculated by the communication device in time slot n is: within [n-c,n-1] The number of comb teeth (or subchannels) whose measured SLRSSI exceeds the first threshold in the detected set of resource blocks used for sidelink transmission, and within [n-c,n-1], in The ratio of the numbers of all comb teeth (or sub-channels) measured in the resource block set used for sidelink transmission detected in the resource pool. For example, the communication device may determine the resource block sets where all sidelink transmissions detected within [n-c,n-1] are located, and then, the communication device may, for each comb (or subchannel) in these resource block sets ) respectively perform SLRSSI measurement to obtain the first CBR, wherein the first CBR represents the number of comb teeth (or sub-channels) whose measured SLRSSI exceeds the first threshold value, and in [n-c, n-1] The ratio of the number of comb teeth (or sub-channels) measured in the resource block set used for sidelink transmission detected in the resource pool.

Fig. 19 is a schematic diagram of determining a first CBR based on comb teeth in at least one resource block set provided by an embodiment of the present application.

As shown in FIG. 19 , it is assumed that the resource pool includes 3 resource block sets, and each resource block set includes 5 comb teeth, and the numbers on the right side of the figure indicate the comb index. It should be understood that each comb should include a plurality of discrete PRBs in the frequency domain, and for simplicity, the multiple discrete PRBs included in the comb are not shown in the figure. The terminal performs CBR measurement in time slot 10, that is, n=10; assuming c=10, each time slot in time slot [0,9] is a time slot for the terminal to perform measurement, that is, the terminal performs CBR measurement according to time slot [0,9] 9] Calculate the first CBR within the measurement results.

Assume that the terminal detects PSCCH in time slot 1, time slot 3, time slot 5, and time slot 8 respectively; wherein, the terminal detects PSCCH1 in time slot 1, indicating that the corresponding PSSCH1 occupies resource block set 0 and resource block set 1, and Occupying comb 0 in each resource block set, the SL RSSI measured by the terminal for all combs in resource block set 0 and resource block 1 is lower than the first threshold; the terminal detects PSCCH2 in time slot 3 , indicating that the corresponding PSSCH2 occupies resource block set 1 and resource block set 2, and occupies comb teeth 3 and comb teeth 4 in each resource block set, and the terminal measures all comb teeth in resource block set 1 and resource block set 2 The obtained SL RSSI is higher than the first threshold value; the terminal detects PSCCH3 in time slot 5, and indicates that the corresponding PSSCH3 occupies resource block set 1, and occupies comb teeth 0 to comb teeth 4 in resource block set 1, and the terminal targets The SL RSSI measured by all comb teeth in resource block set 1 is lower than the first threshold value; the terminal detects PSCCH4 in time slot 8, and indicates that the corresponding PSSCH4 occupies resource block set 0, resource block set 1 and resource block set 2, and occupy comb 0 and comb 1 in each resource block set, and the SL RSSI measured by the terminal for all combs included in the three resource block sets is higher than the first threshold.

Based on this, if the first CBR indicates the number of comb teeth whose measured SLRSSI exceeds the first threshold, and all the resource blocks in the set of resource blocks used for sidelink transmission detected in [n-c,n-1] The ratio of the number of comb teeth measured in the resource block set, then: the total number of comb teeth whose measured SLRSSI exceeds the first threshold is 25; the resources corresponding to all sidelink transmissions detected in the time slot [0,9] The total number of comb teeth measured in the block set is: 40, therefore, the calculated first CBR is 0.625; similarly, if the first CBR indicates the number of comb teeth whose measured SLRSSI exceeds the first threshold value, and in The ratio of the number of comb teeth measured in all resource block sets in the resource pool in [n-c,n-1], then: the total number of comb teeth included in the time slot [0,9] is 150, so , the calculated first CBR is 25/150=0.167.

Exemplarily, when the at least one resource block set is a resource block set available for sidelink transmission, the first CBR calculated by the communication device at time slot n is: within [n-c,n-1], at The number of combs (or subchannels) whose measured SLRSSI exceeds the first threshold in the set of resource blocks that can be used for sidelink transmission, and all combs measured in the resource pool in [n-c,n-1] The ratio of the number of teeth (or sub-channels). For example, the communication device may determine the set of resource blocks available for sidelink transmission within [n-c,n-1], and then, the communication device may separately perform SLRSSI is measured to obtain the first CBR, wherein the first CBR represents the number of comb teeth (or sub-channels) whose measured SLRSSI exceeds the first threshold value, and is the same as that described in [n-c,n-1] The ratio of the number of combs (or sub-channels) measured in all resource block sets in the resource pool.

Exemplarily, when the at least one resource block set is a resource block set available for sidelink transmission, the first CBR calculated by the communication device at time slot n is: within [n-c,n-1], at The number of combs (or subchannels) whose measured SLRSSI exceeds the first threshold in the set of resource blocks available for sidelink transmission is the same as the number of combs (or subchannels) within [n-c,n-1] and available for sidelink transmission The ratio of the number of all combs (or sub-channels) measured within the set of transmitted resource blocks. For example, the communication device may determine the set of resource blocks available for sidelink transmission within [n-c,n-1], and then, the communication device may separately perform SLRSSI measurement to obtain the first CBR, wherein the first CBR represents the number of comb teeth (or sub-channels) whose measured SLRSSI exceeds the first threshold value, and is available in [n-c,n-1] The ratio of the number of comb teeth (or sub-channels) measured in all resource block sets in the resource block set for sidelink transmission.

Fig. 20 is another schematic diagram of determining the first CBR based on the comb teeth in at least one resource block set provided by the embodiment of the present application.

As shown in FIG. 20 , it is assumed that the resource pool includes 3 resource block sets, and each resource block set includes 5 comb teeth. The number on the right side of the figure indicates the comb index, and thd indicates the first threshold value. It should be understood that each comb should include a plurality of discrete PRBs in the frequency domain, and for simplicity, the multiple discrete PRBs included in the comb are not shown in the figure. The terminal performs CBR measurement in time slot 10, that is, n=10; assuming c=10, each time slot in time slot [0,9] is a time slot for the terminal to perform measurement, that is, the terminal performs CBR measurement according to time slot [0,9] 9] Calculate the first CBR within the measurement results. The terminal performs LBT for each resource block set at each slot.

Assuming that the terminal successfully performs LBT for resource block set 0 and resource block set 1 of time slot 1, the terminal measures SL RSSI for all comb teeth in resource block set 0 and resource block set 1; the terminal obtains SL RSSI for the resource block set of time slot 3 If the LBT of resource block set 1 and resource block set 2 is successful, the terminal measures SL RSSI for all comb teeth in resource block set 1 and resource block set 2; the terminal succeeds in the LBT of resource block set 1 of time slot 5, and the terminal measures SL RSSI for resource block set 1 SL RSSI is obtained by measuring all combs in 1; the terminal succeeds in LBT for resource block set 0, resource block set 1 and resource block set 2 of time slot 8, and the terminal obtains SL RSSI by measuring all combs in the three RB sets .

Based on this, if the first CBR indicates the number of comb teeth whose measured SLRSSI exceeds the first threshold, all resource block sets in [n-c,n-1] available for sidelink transmission in the resource block set The ratio of the number of comb teeth measured in the time slot, then: the total number of comb teeth whose measured RSSI exceeds the threshold value is 16; the total number of comb teeth measured in the resource block set corresponding to the successful LBT in the time slot [0,9] is : 40, therefore, the calculated first CBR is 0.4; similarly, if the first CBR represents the number of comb teeth whose measured SLRSSI exceeds the first threshold value, and the The ratio of the number of comb teeth measured in all resource block sets in the above resource pool, then: the total number of comb teeth included in the time slot [0,9] is 150, therefore, the calculated first CBR is 16 /150=0.11.

It should be understood that the resource indication of the SL-U system may include the following two resource indication modes:

The first method: the comb teeth (or subchannels) in each resource block set in the resource pool are indexed independently, and when indicating the sidelink resources, it is necessary to indicate the resource block set information and the comb teeth information corresponding to the sidelink transmission resources ; As shown in Figure 19 or Figure 20, the resource pool includes 3 resource block sets, each resource block set includes 5 comb teeth, and the comb tooth resources in each resource block set are independently numbered, that is, each The comb index in the resource block set is from 0 to 4. When indicating the sidelink transmission resource, it is necessary to indicate the resource block set where the sidelink transmission resource is located and the comb tooth in the resource block set; for example, time slot When the SCI of 3 indicates the transmission resources of the PSSCH, it needs to indicate resource block set 1 and resource block set 2, and indicate comb 3 and comb 4.

The second method: the comb teeth (or subchannels) in all resource block sets in the resource pool are indexed by a unified number, and the comb teeth information corresponding to the side row transmission resources needs to be indicated when indicating the side row resources; for example, suppose the resource pool includes 3 Resource block sets, each resource block set includes 5 comb teeth, the comb teeth resources in the 3 resource block sets are uniformly numbered, that is, the comb tooth index is from 0 to 14, when indicating the sideline transmission resources, It only needs to indicate the comb tooth information where the sidelink transmission resource is located; for example, when the SCI of time slot 2 indicates the transmission resource of the PSSCH, only comb tooth 0 to comb tooth 6 needs to be indicated.

For the first method, the terminal device may directly determine the resource block set indicated by the detected PSCCH as the at least one resource block set, and measure RSSI for all comb resources in the at least one resource block set, and finally The first CBR is determined according to the RSSI measurement result. For the second method, the terminal device may determine the resource block set where the sidelink transmission resource indicated by the PSCCH is located as the at least one resource block set according to the detected PSCCH, and perform the at least one resource block set All the comb resources in measure RSSI, and finally determine the first CBR according to the RSSI measurement result.

Fig. 21 is another schematic diagram of determining the first CBR based on the comb teeth in at least one resource block set provided by the embodiment of the present application.

As shown in Figure 21, assuming that time slot 2 detects PSCCH1 and indicates comb teeth 0 to comb teeth 6, it can be determined that the sidelink transmission resource occupies resource block set 0 and resource block set 1, and all resources in these two resource block sets The RSSI measurement results of comb teeth (that is, comb tooth 0 to comb tooth 9) are all less than the first threshold value; assuming that time slot 5 detects PSCCH2 and indicates comb tooth 13 to comb tooth 14, it can be determined that sidelink transmission resources occupy resource blocks Set 2, the RSSI measurement results of all combs in this resource block set (that is, comb 10 to comb 14) are greater than the first threshold; assuming that time slot 7 detects PSCCH3, indicate comb 7 to comb 11. It can be determined that the sidelink transmission resources occupy resource block set 1 and resource block set 2, and the RSSI measurement results of all combs (that is, comb 5 to comb 14) in the two resource block sets are smaller than the first gate Limits; assuming that time slot 9 detects PSCCH3 and indicates comb tooth 3 to comb tooth 12, it can be determined that the sidelink transmission resources occupy resource block set 0, resource block set 1, and resource block set 2. For these three resource block sets The RSSI measurement results of all comb teeth (that is, comb tooth 0 to comb tooth 14) are greater than the first threshold value.

Based on this, if the first CBR indicates the number of comb teeth whose measured SLRSSI exceeds the first threshold, and all the resource blocks in the set of resource blocks used for sidelink transmission detected in [n-c,n-1] The ratio of the number of comb teeth measured in the resource block set, then: the total number of comb teeth whose measured RSSI exceeds the first threshold is 20; the resources corresponding to all sidelink transmissions detected in the time slot [0,9] The total number of comb teeth measured in the block set is: 40, therefore, the calculated first CBR is 0.5; similarly, if the first CBR indicates the number of comb teeth whose measured SLRSSI exceeds the first threshold value, and in The ratio of the number of comb teeth measured in all resource block sets in the resource pool in [n-c,n-1], then: the total number of comb teeth included in the time slot [0,9] is 150, so , the calculated first CBR is 20/150=0.133.

It should be noted that FIGS. 19 to 21 are only examples of the present application, and should not be construed as limiting the present application. For example, in other alternative embodiments, the numbers on the right side of the figure represent subchannel indexes, and the scheme for determining the first CBR is also applicable to determining the CBR based on performing RSSI measurement on the subchannels in the at least one resource block set scheme.

It should be noted that, in various method embodiments of the present application, unless otherwise specified, the RSSI refers to a lateral RSSI.

In some embodiments, the definition of the SL CR obtained by the measurement of time slot n is: the number of comb teeth that the UE has used for sidelink transmission in the range of [n-a, n-1] and the number of comb teeth in the range of [n, n+b] The ratio of the sum of the number of comb teeth included in the obtained sidelink authorization to the total number of comb teeth belonging to the sending resource pool within the range of [n-a,n+b] (Sidelink Channel Occupancy Ratio (SL CR) evaluated at slot n is defined as the total number of IRBs used for its transmissions in slots[n-a,n-1]and granted in slots[n,n+b]divided by the total number of configured IRBs in the transmission pool over[n-a,n+b]) . CR can be calculated separately for different priorities. Where a is a positive integer, b is 0 or a positive integer, and the values of a and b are determined by the UE, but the following three conditions need to be met:

1) a+b+1=1000 or 1000*2 ^μ time slots;

2) b<(a+b+1)/2;

The preferred embodiments of the present application have been described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present application, various simple modifications can be made to the technical solutions of the present application. These simple modifications all belong to the protection scope of the present application. For example, the various specific technical features described in the above specific implementation manners can be combined in any suitable manner if there is no contradiction. Separately. As another example, any combination of various implementations of the present application can also be made, as long as they do not violate the idea of the present application, they should also be regarded as the content disclosed in the present application.

It should also be understood that, in various method embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the order of execution, and the order of execution of the processes should be determined by their functions and internal logic, and should not be used in this application. The implementation of the examples constitutes no limitation. In addition, in this embodiment of the application, the terms "downlink" and "uplink" are used to indicate the transmission direction of signals or data, wherein "downlink" is used to indicate that the transmission direction of signals or data is from the station to the user equipment in the cell For the first direction, "uplink" is used to indicate that the signal or data transmission direction is the second direction from the user equipment in the cell to the station, for example, "downlink signal" indicates that the signal transmission direction is the first direction. In addition, in the embodiment of the present application, the term "and/or" is only an association relationship describing associated objects, indicating that there may be three relationships. Specifically, A and/or B may mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

The method embodiment of the present application is described in detail above with reference to FIG. 17 to FIG. 20 , and the device embodiment of the present application is described in detail below in conjunction with FIG. 22 to FIG. 24 .

Fig. 22 is a schematic block diagram of a communication device 300 according to an embodiment of the present application.

As shown in FIG. 22, the communication device 300 may include:

A first determining unit 310, configured to determine at least one resource block set belonging to the resource pool within a first time range;

The second determining unit 320 is configured to determine a first channel busy ratio CBR based on a received signal strength indicator (RSSI) obtained by measuring comb teeth in the at least one resource block set.

In some embodiments, the second determining unit 320 is specifically configured to:

Obtaining a first number of comb teeth whose RSSI measurement results in the at least one resource block set exceed a first threshold value by performing RSSI measurement on the comb teeth in the at least one resource block set;

The first CBR is determined based on the first number.

A ratio of the first quantity to the quantity of comb teeth measured by the resource pool within the first time range is determined as the first CBR.

determining a ratio of the first number to the number of comb teeth measured by the at least one resource block set within the first time range as the first CBR.

In some embodiments, the first determining unit 310 is specifically configured to:

The resource block set used for sidelink transmission within the first time range is determined as the at least one resource block set.

In some embodiments, the set of resource blocks used for sidelink transmission is determined according to a detection result of a physical sidelink control channel PSCCH within the first time range.

Determining a set of resource blocks available for sidelink transmission within the first time range as the at least one set of resource blocks.

In some embodiments, the second determining unit 320 is further configured to:

In some embodiments, the first time range is [nc,n-1]; wherein, n represents the time unit for calculating the first CBR, and the value of c is equal to 100 or 100*2 ^μ time units, μ is determined according to the subcarrier spacing.

It should be understood that the device embodiment and the method embodiment may correspond to each other, and similar descriptions may refer to the method embodiment. Specifically, the communication device 300 shown in FIG. 22 may correspond to the corresponding subject in the method 200 of the embodiment of the present application, and the foregoing and other operations and/or functions of each unit in the communication device 300 are for realizing the implementation of the present application. For the sake of brevity, the corresponding processes in each method provided by the example are not repeated here.

The above describes the communication device in the embodiment of the present application from the perspective of functional modules with reference to the accompanying drawings. It should be understood that the functional modules may be implemented in the form of hardware, may also be implemented by instructions in the form of software, and may also be implemented by a combination of hardware and software modules. Specifically, each step of the method embodiment in the embodiment of the present application can be completed by an integrated logic circuit of the hardware in the processor and/or instructions in the form of software, and the steps of the method disclosed in the embodiment of the present application can be directly embodied as hardware The execution of the decoding processor is completed, or the combination of hardware and software modules in the decoding processor is used to complete the execution. Optionally, the software module may be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, and registers. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps in the above method embodiments in combination with its hardware.

For example, the first determining unit 310 or the second determining unit 320 mentioned above may be respectively implemented by a processor.

FIG. 23 is a schematic structural diagram of a communication device 400 according to an embodiment of the present application.

As shown in FIG. 23 , the communication device 400 may include a processor 410 .

Wherein, the processor 410 can invoke and run a computer program from the memory, so as to implement the method in the embodiment of the present application.

As shown in FIG. 23 , the communication device 400 may further include a memory 420 .

Wherein, the memory 420 may be used to store indication information, and may also be used to store codes, instructions, etc. executed by the processor 410 . Wherein, the processor 410 can invoke and run a computer program from the memory 420, so as to implement the method in the embodiment of the present application. The memory 420 may be an independent device independent of the processor 410 , or may be integrated in the processor 410 .

As shown in FIG. 23 , the communication device 400 may further include a transceiver 430 .

Wherein, the processor 410 can control the transceiver 430 to communicate with other devices, specifically, can send information or data to other devices, or receive information or data sent by other devices. Transceiver 430 may include a transmitter and a receiver. The transceiver 430 may further include an antenna, and the number of antennas may be one or more.

It should be understood that various components in the communication device 400 are connected through a bus system, wherein the bus system includes not only a data bus, but also a power bus, a control bus, and a status signal bus.

It should also be understood that the communication device 400 can implement the corresponding processes implemented by the communication device in each method of the embodiment of the present application, that is, the communication device 400 of the embodiment of the present application can correspond to the communication device 300 in the embodiment of the present application , and may correspond to the corresponding subject in executing the method 200 according to the embodiment of the present application, and for the sake of brevity, details are not repeated here.

In addition, the embodiment of the present application also provides a chip.

For example, the chip may be an integrated circuit chip, which has signal processing capabilities, and can implement or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application. The chip can also be called system-on-chip, system-on-chip, system-on-chip or system-on-chip, etc. Optionally, the chip can be applied to various communication devices, so that the communication device installed with the chip can execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application.

FIG. 24 is a schematic structural diagram of a chip 500 according to an embodiment of the present application.

As shown in FIG. 24 , the chip 500 includes a processor 510 .

Wherein, the processor 510 may invoke and run a computer program from the memory, so as to implement the method in the embodiment of the present application.

As shown in FIG. 24 , the chip 500 may further include a memory 520 .

Wherein, the processor 510 can invoke and run a computer program from the memory 520, so as to implement the method in the embodiment of the present application. The memory 520 may be used to store indication information, and may also be used to store codes, instructions, etc. executed by the processor 510 . The memory 520 may be an independent device independent of the processor 510 , or may be integrated in the processor 510 .

As shown in FIG. 24 , the chip 500 may further include an input interface 530 .

Wherein, the processor 510 can control the input interface 530 to communicate with other devices or chips, specifically, can obtain information or data sent by other devices or chips.

As shown in FIG. 24 , the chip 500 may further include an output interface 540 .

Wherein, the processor 510 can control the output interface 540 to communicate with other devices or chips, specifically, can output information or data to other devices or chips.

It should be understood that the chip 500 can be applied to the communication device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the communication device in the methods of the embodiment of the present application, that is, it can correspond to the implementation of the communication device according to the embodiment of the present application. For the sake of brevity, the corresponding subjects in the method 200 will not be repeated here. It should also be understood that various components in the chip 500 are connected through a bus system, wherein the bus system includes a power bus, a control bus, and a status signal bus in addition to a data bus.

Processors mentioned above may include, but are not limited to:

General-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates Or transistor logic devices, discrete hardware components, and so on.

The processor may be used to implement or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application. The steps of the method disclosed in connection with the embodiments of the present application can be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or erasable programmable memory, register. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.

The storage mentioned above includes but is not limited to:

volatile memory and/or non-volatile memory. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electronically programmable Erase Programmable Read-Only Memory (Electrically EPROM, EEPROM) or Flash. The volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of illustration and not limitation, many forms of RAM are available, such as Static Random Access Memory (Static RAM, SRAM), Dynamic Random Access Memory (Dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synch link DRAM, SLDRAM) and Direct Memory Bus Random Access Memory (Direct Rambus RAM, DR RAM).

It should be noted that the memories described herein are intended to include these and any other suitable types of memories.

Embodiments of the present application also provide a computer-readable storage medium for storing computer programs. The computer-readable storage medium stores one or more programs, and the one or more programs include instructions. When the instructions are executed by a portable electronic device including a plurality of application programs, the portable electronic device can perform the wireless communication provided by the application. communication method. Optionally, the computer-readable storage medium can be applied to the communication device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the communication device in each method of the embodiment of the present application. For the sake of brevity, here No longer.

The embodiment of the present application also provides a computer program product, including a computer program. Optionally, the computer program product can be applied to the communication device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the communication device in the methods of the embodiments of the present application. For the sake of brevity, no further repeat.

The embodiment of the present application also provides a computer program. When the computer program is executed by the computer, the computer can execute the wireless communication method provided in this application. Optionally, the computer program can be applied to the communication device in the embodiment of the present application. When the computer program is run on the computer, the computer is made to execute the corresponding processes implemented by the communication device in the methods of the embodiment of the present application. For the sake of brevity , which will not be repeated here.

An embodiment of the present application also provides a communication system, which may include the above-mentioned terminal device and network device to form a communication system 100 as shown in FIG. 1 , which is not repeated here for brevity. It should be noted that the terms "system" and the like in this document may also be referred to as "network management architecture" or "network system".

It should also be understood that the terms used in the embodiments of the present application and the appended claims are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. For example, the singular forms "a", "said", "above" and "the" used in the embodiments of this application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. meaning.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the embodiments of the present application. If implemented in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in the embodiment of the present application. The aforementioned storage medium includes: various media capable of storing program codes such as U disk, mobile hard disk, read-only memory, random access memory, magnetic disk or optical disk.

Those skilled in the art can also realize that for the convenience and brevity of description, the specific working process of the above-described system, device, and unit can refer to the corresponding process in the foregoing method embodiment, and details are not repeated here. In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the division of units or modules or components in the above-described device embodiments is only a logical function division, and there may be other division methods in actual implementation, for example, multiple units or modules or components can be combined or integrated to another system, or some units or modules or components may be ignored, or not implemented. For another example, the units/modules/components described above as separate/display components may or may not be physically separated, that is, they may be located in one place, or may also be distributed to multiple network units. Part or all of the units/modules/components can be selected according to actual needs to achieve the purpose of the embodiments of the present application. Finally, it should be noted that the mutual coupling or direct coupling or communication connection shown or discussed above may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms .

The above content is only the specific implementation of the embodiment of the application, but the scope of protection of the embodiment of the application is not limited thereto. Anyone familiar with the technical field can easily think of Any changes or substitutions shall fall within the protection scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application should be determined by the protection scope of the claims.

Claims

A wireless communication method, characterized in that the method is applicable to a communication device, and the method includes:

determining at least one resource block set belonging to the resource pool within the first time range;

Determine a first channel busy rate CBR based on a received signal strength indicator (RSSI) obtained by measuring comb teeth in the at least one resource block set.
The method according to claim 1, wherein the determination of the first channel busy rate CBR based on the received signal strength indicator (RSSI) obtained by measuring the comb teeth in the at least one resource block set includes:

Obtaining a first number of comb teeth whose RSSI measurement results in the at least one resource block set exceed a first threshold value by performing RSSI measurement on the comb teeth in the at least one resource block set;

The first CBR is determined based on the first number.
The method according to claim 2, wherein the determining the first CBR based on the first quantity comprises:

determining a ratio of the first number to the number of comb teeth measured by the communication device in the resource pool within the first time range as the first CBR.
The method according to claim 2, wherein the determining the first CBR based on the first quantity comprises:

A ratio of the first number to the number of comb teeth measured by the communication device in the at least one resource block set within the first time range is determined as the first CBR.
The method according to any one of claims 2 to 4, wherein the first threshold value is pre-configured or configured by a network device.
The method according to any one of claims 1 to 5, wherein the determining at least one resource block set belonging to the resource pool within the first time range comprises:

The resource block set used for sidelink transmission within the first time range is determined as the at least one resource block set.
The method according to claim 6, wherein the set of resource blocks used for sidelink transmission is determined according to a detection result of a physical sidelink control channel (PSCCH) within the first time range.
The method according to claim 6, wherein the resource block set used for sidelink transmission includes the resource block set where the sidelink transmission resource indicated by the PSCCH detected within the first time range is located.
The method according to any one of claims 1 to 5, wherein the determining at least one resource block set belonging to the resource pool within the first time range comprises:

Determining a set of resource blocks available for sidelink transmission within the first time range as the at least one set of resource blocks.
The method according to claim 9, wherein the set of resource blocks available for sidelink transmission is determined according to channel access results of the set of resource blocks in the resource pool.
The method according to claim 9, wherein the set of resource blocks available for sidelink transmission includes successful channel access to the set of resource blocks in the resource pool within the first time range A collection of resource blocks.
The method according to claim 9, characterized in that the method further comprises:

Perform channel access to the set of resource blocks in the resource pool within the first time range by using at least one of the following access methods:

Type 1 channel access, type 2 channel access, type 2A channel access, type 2B channel access, type 2C channel access.
The method according to any one of claims 1 to 12, wherein the first time range is [nc,n-1]; wherein, n represents the time unit for calculating the first CBR, and c The value is equal to 100 or 100*2 μ time units, and μ is determined according to the subcarrier interval.
A communication device, characterized in that it includes:

A first determining unit, configured to determine at least one resource block set belonging to the resource pool within a first time range;

The second determining unit is configured to determine a first channel busy rate CBR based on a received signal strength indicator (RSSI) obtained by measuring comb teeth in the at least one resource block set.
The communication device according to claim 14, wherein the second determining unit is specifically configured to:

Obtaining a first number of comb teeth whose RSSI measurement results in the at least one resource block set exceed a first threshold value by performing RSSI measurement on the comb teeth in the at least one resource block set;

The first CBR is determined based on the first number.
The communication device according to claim 15, wherein the second determining unit is specifically configured to:

A ratio of the first quantity to the quantity of comb teeth measured by the resource pool within the first time range is determined as the first CBR.
The communication device according to claim 15, wherein the second determining unit is specifically configured to:

determining a ratio of the first number to the number of comb teeth measured by the at least one resource block set within the first time range as the first CBR.
The communication device according to any one of claims 15 to 17, wherein the first threshold value is pre-configured or configured by a network device.
The communication device according to any one of claims 14 to 18, wherein the first determining unit is specifically configured to:

The resource block set used for sidelink transmission within the first time range is determined as the at least one resource block set.
The communication device according to claim 19, wherein the set of resource blocks used for sidelink transmission is determined according to a detection result of a physical sidelink control channel (PSCCH) within the first time range.
The communication device according to claim 19, wherein the set of resource blocks used for sidelink transmission includes the set of resource blocks where sidelink transmission resources indicated by the PSCCH detected within the first time range are located.
The communication device according to any one of claims 14 to 21, wherein the first determining unit is specifically configured to:

Determining a set of resource blocks available for sidelink transmission within the first time range as the at least one set of resource blocks.
The communication device according to claim 22, wherein the set of resource blocks available for sidelink transmission is determined according to channel access results of the set of resource blocks in the resource pool.
The communication device according to claim 22, wherein the set of resource blocks available for sidelink transmission includes successfully accessing the set of resource blocks in the resource pool within the first time range. The input resource block set.
The communication device according to claim 22, wherein the second determining unit is further configured to:

Perform channel access to the set of resource blocks in the resource pool within the first time range by using at least one of the following access methods:

Type 1 channel access, type 2 channel access, type 2A channel access, type 2B channel access, type 2C channel access.
The communication device according to any one of claims 14 to 25, wherein the first time range is [nc,n-1]; where n represents the time unit for calculating the first CBR, c The value of is equal to 100 or 100*2 μ time units, and μ is determined according to the subcarrier spacing.
A communication device, characterized in that it includes:

A processor and a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method according to any one of claims 1 to 13.
A chip, characterized in that it comprises:

The processor is used to call and run the computer program from the memory, so that the device installed with the chip executes the method according to any one of claims 1 to 13.
A computer-readable storage medium, characterized in that it is used to store a computer program, the computer program causes a computer to execute the method according to any one of claims 1 to 13.
A computer program product, characterized by comprising computer program instructions, the computer program instructions causing a computer to execute the method according to any one of claims 1 to 13.
A computer program, characterized in that the computer program causes a computer to execute the method according to any one of claims 1 to 13.