Communication methods and terminal equipment

Abstract

A method for communication and a terminal device are provided. The method is applied to a terminal device, the terminal device including a first RAT and a second RAT, and the method includes a step of the second RAT obtaining first information of the first RAT, the first information being used to indicate information related to a first resource of the first RAT, both of the first RAT and the second RAT being sidelink-based RATs. According to the present application, the second RAT can schedule the first RAT and / or the second RAT according to the first resource indicated in the first information, thereby avoiding transmission collisions between the first RAT and the second RAT.

Description

[Technical Field]

[0001] The present application relates to the field of communication technologies, and more particularly to a method and terminal device for communication. [Background technology]

[0002] Although the market penetration rate of sidelink communication systems may increase over time, different RATs based on SL can only coexist in the same channel scenario, i.e., different RATs can coexist in the same frequency channel. For example, if LTE SL and NR SL may exist in the same terminal device, LTE SL and NR SL must coexist in the same channel scenario. If the terminal device includes multiple RATs based on SL, interference may occur between the multiple RATs. Summary of the Invention [Problem to be solved by the invention]

[0003] The present application provides a terminal device and a network device. Hereinafter, each aspect of the present application will be described. [Means for solving the problem]

[0004] In a first aspect, there is provided a method for communication, the method being applied to a terminal device, the terminal device including a first radio access technology (RAT) and a second RAT, the method including a step of the second RAT obtaining first information of the first RAT, the first information being used to indicate information related to a first resource of the first RAT, and both the first RAT and the second RAT being sidelink-based RATs.

[0005] In some embodiments, the information related to the first resource includes sensing information and / or resource information.

[0006] In some embodiments, the resource information comprises one or more of the following information of the first RAT: reserved resource related information of the terminal device, reserved resource related information determined based on sidelink control information SCI decoding, subchannel configuration information, candidate resource sets, logical subframe related information, priority information, transmission resource related information.

[0007] In some embodiments, the sensing information is used to indicate a sensing result, and the sensing result includes one or more parameters of a reference signal received power RSRP, a reference signal received quality RSRQ, and a received signal strength indicator RSSI obtained by sensing a signal and / or a channel of a first RAT.

[0008] In some embodiments, the method further includes a step of the second RAT sending a first request message, and the step of the second RAT obtaining the first information shared by the first RAT includes a step of the second RAT receiving the first information in response to sending the first request message.

[0009] In some embodiments, the method further includes one or more of the following steps: the first RAT sharing the first information based on time; the first RAT sharing the first information based on a message; and the first RAT sharing the first information based on a pre-configuration.

[0010] In some embodiments, the step of the second RAT acquiring the first information shared by the first RAT includes one or more of the following steps: the second RAT periodically acquiring the first information shared by the first RAT; the second RAT acquiring the first information shared by the first RAT in response to a second RAT service trigger condition; and the second RAT acquiring the first information shared by the first RAT in response to a detection result of the first RAT being less than or equal to a first threshold.

[0011] In some embodiments, the first threshold is pre-set and / or configured by a higher layer.

[0012] In some embodiments, the method further includes, in slot n, the second RAT providing higher layer parameters for transmission of a PSSCH and / or a PSCCH, and the step of the second RAT acquiring first information of the first RAT includes the step of the second RAT acquiring the first information within T milliseconds before the slot n and determining transmission resources of the second RAT based on the first information, or the step of the second RAT acquiring the first information within a first time window and determining transmission resources of the second RAT based on the first information, where T is less than or equal to Tmax and Tmax is a positive integer.

[0013] In some embodiments, the first information is used to indicate transmission resources required by the first RAT in a shared transmission resource, where the shared transmission resource is shared by the first RAT and the second RAT.

[0014] In some embodiments, the proportion of the shared transmission resources required by the first RAT is configured or predefined.

[0015] In some embodiments, the method further includes one or more of the following steps: when both the first RAT and the second RAT need to use the shared transmission resources, preferentially allocating resources to a RAT with a larger detection result; when a target RAT in the first RAT and the second RAT needs to use the shared transmission resources, allocating some resources in the shared transmission resources to the target RAT; and when a target RAT in the first RAT and the second RAT needs to use the shared transmission resources, reserving some resources in the shared transmission resources for a RAT other than the target RAT.

[0016] In some embodiments, the transmission resources required for the first RAT are determined by a channel busy rate CBR, and CBRn corresponding to subframe n satisfies [Equation 1], where k1, k2, and k3 are all greater than 0 and less than 1, M is the number of subframes that determine CBRn, and Q indicates the detection result of the corresponding subframe.

[0017]

number

[0018] In some embodiments, the transmission resources required for the first RAT are determined by a channel resource CR, which is determined based on a CBR, and the CR is used to determine the size of the transmission resources required for the first RAT and / or the second RAT2 in the shared transmission resources.

[0019] In some embodiments, the method further comprises one or more of the steps of preferentially allocating and / or allocating resources in the shared transmission resources to a RAT with a higher RAT priority, preferentially allocating and / or allocating resources in the shared transmission resources to a service with a higher service priority, and preferentially allocating and / or allocating resources in the shared transmission resources to a RAT with a physical sidelink feedback channel PSFCH based on different RATs.

[0020] In some embodiments, the resources required for the second RAT include transmission resources required for a PSFCH, and the periodicity of the transmission resources required for the PSFCH is P times the periodicity of the transmission resources required for the first RAT, where P is a positive integer.

[0021] In some embodiments, the transmission resources required for the PSFCH include a slot in which the PSFCH is located, and the slot in which the PSFCH is located is relative to a reference slot, and the reference slot is a start slot of the second RAT in the shared transmission resources.

[0022] In some embodiments, the slot in which the PSFCH is located satisfies [Equation 2], where n indicates the position of the reference slot, Q is a scaling factor and Q is a positive number, [Equation 3] indicates the periodicity of the transmission resources required for the PSFCH, and [Equation 4] indicates that one slot out of [Equation 5] slots is the PSFCH.

[0023]

number

number

number

number

[0024] In some embodiments, when the detection result of the second RAT is equal to or greater than a detection threshold, R is an integer equal to or greater than 2.

[0025] In some embodiments, the detection threshold is pre-configured and / or configured by a higher layer of the second RAT.

[0026] In some embodiments, the resources required for the second RAT include transmission resources required for a PSFCH, and the location of the transmission resources required for the PSFCH in the shared transmission resources is pre-configured.

[0027] In some embodiments, the resources required for the second RAT include transmission resources required for a PSFCH, and prohibit transmission of the PSFCH in the shared transmission resources.

[0028] In a second aspect, there is provided a terminal device, the terminal device including a first radio access technology (RAT) and a second RAT, the terminal device including an acquisition unit configured for the second RAT to acquire first information of the first RAT, the first information being used to indicate information related to a first resource of the first RAT, and the first RAT and the second RAT both being RATs based on a sidelink.

[0029] In some embodiments, the information related to the first resource includes sensing information and / or resource information.

[0030] In some embodiments, the resource information comprises one or more of the following information of the first RAT: reserved resource related information of the terminal device, reserved resource related information determined based on sidelink control information SCI decoding, subchannel configuration information, candidate resource sets, logical subframe related information, priority information, transmission resource related information.

[0031] In some embodiments, the sensing information is used to indicate a sensing result, and the sensing result includes one or more parameters of a reference signal received power RSRP, a reference signal received quality RSRQ, and a received signal strength indicator RSSI obtained by sensing a signal and / or a channel of a first RAT.

[0032] In some embodiments, the terminal device further includes a transmitting unit configured to cause the second RAT to transmit a first request message, and the obtaining unit is specifically used for a step in which the second RAT receives the first information in response to the transmission of the first request message.

[0033] In some embodiments, the terminal device further includes a sharing unit, and the sharing unit is configured in one or more of the following ways: the first RAT shares the first information based on time; the first RAT shares the first information based on a message; and the first RAT shares the first information based on a pre-configured setting.

[0034] In some embodiments, the acquisition unit is specifically used for one or more of the following steps: the second RAT periodically acquiring first information shared by the first RAT; the second RAT acquiring first information shared by the first RAT in response to a second RAT service trigger condition; and the second RAT acquiring first information shared by the first RAT in response to the detection result of the first RAT being below a first threshold.

[0035] In some embodiments, the first threshold is pre-set and / or configured by a higher layer.

[0036] In some embodiments, the terminal device is further configured such that, in slot n, the second RAT provides higher layer parameters for transmission of a PSSCH and / or a PSCCH, and the acquisition unit is specifically configured such that the second RAT acquires the first information within T milliseconds before slot n and determines transmission resources of the second RAT based on the first information, or the second RAT acquires the first information within a first time window and determines transmission resources of the second RAT based on the first information, where T is less than or equal to Tmax and Tmax is a positive integer.

[0037] In some embodiments, the first information is used to indicate transmission resources required by the first RAT in a shared transmission resource, where the shared transmission resource is shared by the first RAT and the second RAT.

[0038] In some embodiments, the proportion of the shared transmission resources required by the first RAT is configured or predefined.

[0039] In some embodiments, the terminal device is further configured to have one or more of the following: when both the first RAT and the second RAT need to use the shared transmission resources, preferentially allocate resources to a RAT with a larger detection result; when a target RAT in the first RAT and the second RAT needs to use the shared transmission resources, allocate some resources in the shared transmission resources to the target RAT; and when a target RAT in the first RAT and the second RAT needs to use the shared transmission resources, reserve some resources in the shared transmission resources for RATs other than the target RAT.

[0040] In some embodiments, the transmission resources required for the first RAT are determined by a channel busy rate CBR, and CBRn corresponding to subframe n satisfies [Equation 6], where k1, k2, and k3 are all greater than 0 and less than 1, M is the number of subframes determining CBRn, and Q indicates the detection result of the corresponding subframe.

[0041]

number

[0042] In some embodiments, the transmission resources required for the first RAT are determined by a channel resource CR, which is determined based on a CBR, and the CR is used to determine the size of the transmission resources required for the first RAT and / or the second RAT2 in the shared transmission resources.

[0043] In some embodiments, the method further comprises one or more of the following: preferentially allocating and / or allocating resources in the shared transmission resources to a RAT with a higher RAT priority; preferentially allocating and / or allocating resources in the shared transmission resources to a service with a higher service priority; and preferentially allocating and / or allocating resources in the shared transmission resources to a RAT with a physical sidelink feedback channel PSFCH based on different RATs.

[0044] In some embodiments, the resources required for the second RAT include transmission resources required for a PSFCH, and the periodicity of the transmission resources required for the PSFCH is P times the periodicity of the transmission resources required for the first RAT, where P is a positive integer.

[0045] In some embodiments, the transmission resources required for the PSFCH include a slot in which the PSFCH is located, and the slot in which the PSFCH is located is relative to a reference slot, and the reference slot is a start slot of the second RAT in the shared transmission resources.

[0046] In some embodiments, the slot in which the PSFCH is located satisfies [Equation 7], where n indicates the position of the reference slot, Q is a scaling factor and Q is a positive number, [Equation 8] indicates the periodicity of the transmission resources required for the PSFCH, and [Equation 9] indicates that one slot out of [Equation 10] slots is the PSFCH.

[0047]

number

number

number

number

[0048] In some embodiments, when the detection result of the second RAT is equal to or greater than a detection threshold, R is an integer equal to or greater than 2.

[0049] In some embodiments, the detection threshold is pre-configured and / or configured by a higher layer of the second RAT.

[0050] In some embodiments, the resources required for the second RAT include transmission resources required for a PSFCH, and the location of the transmission resources required for the PSFCH in the shared transmission resources is pre-configured.

[0051] In some embodiments, the resources required for the second RAT include transmission resources required for a PSFCH, and prohibit transmission of the PSFCH in the shared transmission resources.

[0052] In a third aspect, a communication device is provided that includes a memory and a processor, the memory being used to store a program, and the processor calling the program in the memory to cause the terminal device to perform some or all of the steps of the method of the first aspect.

[0053] In a fourth aspect, the present invention provides a communication system including the terminal device. In another possible design, the system may further include other devices that interact with the terminal device in a manner according to the present invention.

[0054] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium storing a computer program that causes a terminal device to execute some or all of the steps of the methods of the above aspects.

[0055] In a sixth aspect, embodiments of the present application provide a computer program product including a non-transitory computer-readable storage medium having stored thereon a computer program operable to cause a terminal device to perform some or all of the steps of the method of each of the above aspects. In some implementations, the computer program product may be a software installation package.

[0056] In a seventh aspect, an embodiment of the present application provides a chip including a memory and a processor, the processor being capable of calling and executing a computer program from the memory, thereby implementing some or all of the steps described in the methods of the above aspects.

[0057] According to the present application, the second RAT can obtain first information of the first RAT, and the second RAT can schedule the first RAT and / or the second RAT according to the first resource indicated in the first information, thereby avoiding transmission collisions between the first RAT and the second RAT. [Brief explanation of the drawings]

[0058] [Figure 1] FIG. 1 illustrates an example of a wireless communication system to which an embodiment of the present application can be applied. [Figure 2] FIG. 1 is a diagram illustrating an example of NR-V2X communication. [Figure 3] 1 is a flowchart of a method for communication according to one embodiment of the present application. [Figure 4] FIG. 1 is a schematic diagram of an interface according to an embodiment of the present application. [Figure 5] 4 is a flowchart of another method for communication according to an embodiment of the present application. [Figure 6] FIG. 2 is a schematic diagram of a method for determining a CBR according to an embodiment of the present application. [Figure 7] FIG. 1 is a comparison diagram of the slot structures of LTE SL and NR SL. [Figure 8] FIG. 1 is a schematic structural diagram of a terminal device according to an embodiment of the present application; [Figure 9]1 is a structural schematic diagram of a communication device according to an embodiment of the present application; DETAILED DESCRIPTION OF THE INVENTION

[0059] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings. It is obvious that the described embodiments are only some embodiments of the present application, not all embodiments. For ease of understanding, the following will first explain the terms and communication processes related to the present application.

[0060] 1 is a diagram illustrating an example of a system architecture of a wireless communication system 100 applied to an embodiment of the present application. The wireless communication system 100 may include a network device 110 and terminal devices 121 to 129. The network device 110 can provide communication coverage in a specific geographical area and can communicate with terminals located within the coverage area.

[0061] In some implementations, communication between terminal devices can occur via a sidelink (SL), which may also be referred to as proximity services (ProSe) communication, single-sided communication, sidelink communication, device to device (D2D) communication, etc.

[0062] Alternatively, sidelink data may be transmitted between terminal devices via a sidelink. The sidelink data may include data and / or control signaling. In some implementations, the sidelink data may be, for example, a physical sidelink control channel (PSCCH), a physical sidelink share channel (PSSCH), a PSCCH demodulation reference signal (DMRS), a PSSCH DMRS, a physical sidelink feedback channel (PSFCH), etc.

[0063] Below, several common sidelink communication scenarios are described with reference to Figure 1. Sidelink communication can be divided into three scenarios depending on whether the terminal device in the sidelink is within the coverage range of the network device. In scenario 1, the terminal device performs sidelink communication within the coverage range of the network device. In scenario 2, some terminal devices perform sidelink communication within the coverage range of the network device. In scenario 3, the terminal device performs sidelink communication outside the coverage range of the network device.

[0064] 1, in scenario 1, terminal devices 121-122 can communicate via a sidelink, and terminal devices 121-122 are all within the coverage range of network device 110, or terminal devices 121-122 are all within the coverage range of the same network device 110. In this scenario, network device 110 can send configuration signaling to terminal devices 121-122, and correspondingly, terminal devices 121-122 communicate via a sidelink based on the configuration signaling.

[0065] As shown in FIG. 1 , in scenario 2, terminal devices 123 and 124 can communicate via a sidelink, where terminal device 123 is within the coverage range of network device 110 and terminal device 124 is outside the coverage range of network device 110. In this scenario, terminal device 123 receives configuration information from network device 110 and communicates via a sidelink based on the configuration signaling. However, terminal device 124, being outside the coverage range of network device 110, cannot receive the configuration information from network device 110. In this case, terminal device 124 can obtain a configuration for sidelink communication based on pre-configured configuration information and / or configuration information transmitted from terminal device 123 within its coverage range, and communicates with terminal device 123 via a sidelink based on the obtained configuration.

[0066] In some cases, the terminal device 123 may transmit the above-mentioned configuration information to the terminal device 124 via a physical sidelink broadcast channel (PSBCH) in order to configure the terminal device 124 to communicate via the sidelink.

[0067] 1, in scenario 3, all of the terminal devices 125-129 are outside the coverage area of ​​the network device 110 and cannot communicate with the network device 110. In this case, all of the terminal devices can communicate via the sidelink based on preconfigured information.

[0068] In some cases, the terminal devices 127-129 outside the coverage area of ​​the network device may form a communication group, and the terminal devices 127-129 in the communication group may communicate with each other. The terminal device 127 in the communication group may be a central control node and may also be called a cluster header terminal (CH), and the terminal devices in other communication groups may be called "group members" correspondingly.

[0069] The terminal device 127, which is a CH, may have one or more of the following functions: establishing a communication group, adding and removing group members, coordinating resources, allocating sidelink transmission resources to group members, receiving sidelink feedback information of group members, and coordinating resources with other communication groups.

[0070] Note that FIG. 1 exemplarily illustrates one network device and multiple terminal devices, and optionally, the wireless communication system 100 may include multiple network devices, and the coverage area of ​​each network device may include other numbers of terminal devices, and the embodiments of the present application are not limited thereto.

[0071] Optionally, the wireless communication system 100 may further include other network entities, such as a network controller and a mobility management entity, although the embodiments of the present application are not limited thereto.

[0072] It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, such as a 5th generation (5G) system or a new radio (NR) system, a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD) system, etc. The technical solutions of the present application can also be applied to future communication systems, such as a 6th generation mobile communication system and a satellite communication system.

[0073] The terminal device in the embodiments of the present application may also be referred to as a user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or user equipment. The terminal device in the embodiments of the present application may refer to a device that provides voice and / or data connectivity to a user and can be used to connect humans, objects, and machines, such as a handheld device or vehicle-mounted device with wireless connectivity. In embodiments of the present application, the terminal device may be a mobile phone, a tablet, a laptop, a palmtop computer, a mobile internet device (MID), a wearable device, a vehicle, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc. Optionally, the terminal device may function as a base station. For example, the terminal device may function as a scheduling entity and provide sidelink signals between terminal devices in vehicle-to-everything (V2X) or D2D systems. For example, a cellular phone and a car communicate with each other using sidelink data. The cellular phone and a smart home device communicate with each other without the need for a base station to relay communication signals.

[0074] The network equipment in the embodiments of the present application may be equipment for communicating with terminal equipment, and may be referred to as access network equipment or radio access network equipment, for example, the network equipment may be a base station. The network equipment in the embodiments of the present application may refer to a radio access network (RAN) node (or equipment) that allows terminal equipment to access a wireless network. The base station may broadly cover or be replaced with various names such as a Node B (Node B), an evolved Node B (eNB), a next generation Node B (gNB), a relay station, a transmitting and receiving point (TRP), a transmitting point (TP), an access point (AP), a primary base station MeNB, a secondary base station SeNB, a multi-standard radio (MSR) node, a home base station, a network controller, an access node, a radio node, a transmission node, a transceiver node, a base band unit (BBU), a remote radio unit (RRU), an active antenna unit (AAU), a remote radio head (RRH), a central unit (CU), a distributed unit (DU), a positioning node, etc. The base station may be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof. A base station may also refer to a communication module, modem, or chip installed in the aforementioned device or apparatus. A base station may also be a mobile switching center and a device that performs the function of a base station in D2D, V2X, and machine-to-machine (M2M) communications, a network side device in a 6G network, or a device that performs the function of a base station in a future communication system. A base station can support networks of the same or different access technologies.The embodiments of the present application do not limit the specific technology adopted in the network device or the specific device configuration.

[0075] The base station may be fixed or mobile. For example, a helicopter or a drone may be configured as a mobile base station, and one or more cells may move depending on the location of the mobile base station. In another example, a helicopter or a drone may be configured as a device for communicating with another base station.

[0076] In some deployments, the network equipment in the embodiments of the present application may refer to a CU or a DU, or may include a CU and a DU. The gNB may further include an AAU.

[0077] The network device and the terminal device may be located indoors or outdoors, on land, including handheld or vehicle-mounted, on water, or on an airplane, balloon, or satellite in the sky. The embodiments of the present application do not limit the scenario in which the network device and the terminal device are located.

[0078] It should be understood that all or part of the functionality of the communication device in this application may be realized by software functions executed on hardware, or by virtualization functions instantiated on a platform (e.g., a cloud platform).

[0079] [Sidelink communication mode] With the development of sidelink communication technology, it is related to information interactions between various types of terminal devices. Taking the V2X communication system 200 shown in Figure 2 as an example, vehicle-to-vehicle (V2V) communication between terminal device 201 and terminal device 202 is related to information interactions between the vehicles themselves. Vehicle-to-infrastructure (V2I) communication, vehicle-to-network (V2N) communication, and vehicle-to-pedestrian (V2P) communication between terminal device 201 and terminal devices 203 to 205 are related to information interactions between vehicles and external systems.

[0080] The gradual expansion of the scope of information interaction places higher demands on communication systems. For example, communication systems are required to support higher throughput, lower latency, higher reliability, wider coverage, and more flexible resource allocation. Taking the development of V2X as an example, LTE-V2X only supports sidelink communication between terminal devices in broadcast mode, while NR-V2X can support three communication modes: broadcast, groupcast, and unicast.

[0081] Broadcast is the most basic communication mode in sidelink communication. In the broadcast transmission mode, the terminal device receiving the sidelink data may be any terminal device located in the vicinity of the terminal device that is the sender. For example, referring to FIG. 1, if the terminal device 125 is the sender and transmits the sidelink data in the form of broadcast, all of the terminal devices 121 to 124 and 126 to 129 located in the vicinity of the terminal device 125 may be receivers of the sidelink data.

[0082] Groupcast communication only supports information interaction between terminal devices within a specific group (also called a communication group) and is used to assist the terminal devices in the group in completing negotiations and decisions. Sidelink groupcast is divided into two transmission types. Type 1 is for managed groups where stable connection relationships exist, and has clear ID information and information on group members. Type 2 is a temporary group configured in a connectionless form, for example, a form of groupcast where a group is dynamically created based on distance, and it is necessary to clearly indicate the communication distance of the current service.

[0083] In the case of a groupcast transmission mode, the terminal devices receiving the sidelink data may be all terminal devices in a communication group. Alternatively, the terminal devices receiving the sidelink data may be all terminal devices within a certain transmission distance. For example, referring to FIG. 1, for a communication group including terminal devices 127-129, when terminal device 127 transmits sidelink data in the groupcast mode, all other terminal devices 128-129 in the communication group are receiving terminals that receive the sidelink data. Also, referring to FIG. 1, if the terminal devices within a predetermined range include terminal devices 127-129, when terminal device 127 transmits sidelink data in the groupcast mode, all other terminal devices 128-129 within the predetermined range are receiving terminals that receive the sidelink data.

[0084] Unicast communication can realize sidelink communication between two terminal devices. Taking NR-V2X as an example, radio resource control (RRC) signaling based on the PC5 interface can realize reliable communication from terminal device to terminal device.

[0085] In the unicast transmission mode, only one terminal device typically receives sidelink data. Referring to FIG. 1, the terminal device 121 and the terminal device 122 may communicate with each other in a unicast transmission manner. For example, when the terminal device 121 and the terminal device 122 are performing sidelink communication, the terminal device 122 receives the sidelink data as the only receiving device. The sidelink data may include a PSSCH and a PSCCH. The terminal device 122 can obtain sidelink control information (SCI) related to sidelink transmission and scheduling by demodulating the sidelink data. The SCI helps the terminal device 122 to receive and decode the sidelink information.

[0086] In some communication systems (e.g., NR-V2X), sidelink unicast and groupcast services support a hybrid automatic repeat request (HARQ) mechanism via acknowledgement (ACK) / negative acknowledgement (NACK). For groupcast services, NACK-only HARQ can also be adopted. A blind retransmission mechanism is also supported. Sidelink HARQ feedback is transmitted by the receiving terminal device to the transmitting terminal device on the PSFCH.

[0087] In communications standards, sidelink communications are currently undergoing significant research and standardization. For example, in Rel-16, RAN is researching sidelink communications, primarily supporting high-level V2X applications. In Rel-17, SA2 is researching and standardizing proximity-based services, including public security and business-related services. As part of Rel-17, RAN1 and RAN2 are developing energy-saving solutions (e.g., partial sensing, discontinuous reception (DRX)), and inter-device coordination to improve power consumption and reliability of sidelink transmissions for battery-limited devices.

[0088] [Different radio access technologies (RATs) coexist on the same channel] Although the market penetration rate of sidelink communication systems may increase over time, different V2X-based RATs can only coexist in the same channel scenario, i.e., V2X devices of different RATs can coexist on the same frequency channel. For example, LTE-V2X and NRV-2X may exist in the same terminal device, i.e., LTE-V2X and NRV-2X can only coexist in the same channel scenario. Coexistence of different RATs on the same channel enables higher data rates and greater bandwidth support for non-intelligent transportation system (ITS) frequency bands. However, for ITS bands, LTE-V2X and NRV-2X may be considered as a priority to realize basic security V2X use cases within a relatively short timeframe. It is necessary to enable a same-channel coexistence mechanism, which can ensure time alignment between slots of different RATs. It should be understood that in some cases, for example, if the coexistence framework in Rel. 16 devices is not supported, different RATs must use the same synchronization source. In this case, different RATs have the same understanding of time, and no inference occurs between systems. However, the synchronization sources between different RATs may differ, and this issue may only arise in corner cases, such as when a terminal device moves outside a certain coverage area, causing a change in the associated synchronization source. In such cases, implementation-based solutions can be defined.

[0089] Devices of different RAT types can coexist using the same carrier frequency. The key is to effectively utilize resource allocations for multiple RATs without interfering with or affecting the operation of each RAT. First, the design principles for the coexistence mechanism between different RATs on the same channel can be considered. The applicant believes that the basic design principle for LTE SL and NR SL is to ensure backward compatibility between R14 / R15 LTE SL and R16 / R17 NR SL. It is also important to reuse the intra-device coexistence framework defined in Rel-16 as much as possible. It is also necessary to consider whether there is performance degradation in LTE SL and whether the performance degradation is limited.

[0090] Terminal equipment types include, for example, Type A to Type E as follows: Type A equipment is Rel-18 equipment and includes LTE SL and NR SL. Type B equipment is Rel-18 equipment that includes only NR SL. Type C equipment is Rel-14 / Rel-15 equipment that includes only LTE SL. Type D equipment is Rel-16 / 17 equipment that includes only NR SL. Type E equipment is Rel-16 equipment that includes LTE SL and NR SL. As is clear, both Type A and Type E equipment include two RATs, namely, LTE SL and NR SL.

[0091] It should be understood that when multiple RATs are included in a terminal device, interference may occur between the multiple RATs. In response to this problem, the present application proposes a method for communication.

[0092] FIG. 3 is a flowchart of a method for communication according to one embodiment of the present application.

[0093] The method illustrated in FIG. 3 may be performed by a terminal device. The terminal device may include at least two different RATs. For example, the terminal device may include a first RAT and a second RAT. The first RAT and the second RAT may coexist on the same channel. The first RAT and the second RAT may both be based on sidelink. For example, the first RAT may be LTE SL and the second RAT may be NR SL. Alternatively, the first RAT may be NR SL and the second RAT may be LTE SL.

[0094] It should be noted that the present application does not limit the form in which the first RAT or the second RAT is displayed in the terminal device. For example, the first RAT or the second RAT may be present in the terminal device in the form of a module, a chip, or the like.

[0095] The method shown in Figure 3 may include step S310: In step S310, the second RAT obtains first information of the first RAT.

[0096] The first information may be used to indicate information related to a first resource of a first RAT. That is, the first RAT can share information related to the first resource with a second RAT through the first information. The first resource may be a resource related to the first RAT. For example, the first resource may include a resource actually used by the first RAT, a reserved resource for the first RAT, a resource intended to be used by the first RAT, a resource shared by the first RAT and the second RAT, etc.

[0097] In some embodiments, the information related to the first resource may include sensing information and / or resource information of the first RAT.

[0098] The first RAT may sense a channel to obtain sensing information. The sensing information may be used, for example, to indicate a sensing result obtained by the first RAT. The terminal device may obtain the sensing result in the form of sensing, measurement, etc., and therefore, in some embodiments, the sensing result may be referred to as a sensing result or a measurement result. The sensing result may include one or more parameters obtained by sensing a signal and / or channel of the first RAT, such as a sidelink reference signal received power (SL RSRP), a sidelink reference signal received quality (SL RSRQ), and a sidelink received signal strength indicator (SL RSSI). The present application does not limit the above-mentioned signals and / or channels of the first RAT; i.e., the sensing result may be obtained by sensing any signal and / or channel associated with the first RAT. For example, the sensing result may be determined based on measurements of a received signal including control information.

[0099] In one specific implementation, the terminal device may measure RSSI parameters (e.g., S1 RSSI parameters) associated with various sidelink channels to obtain the detection results. Alternatively, the terminal device may measure RSRP parameters (e.g., PSSCH-RSRP parameters) associated with various sidelink channels to obtain the detection results. Alternatively, the terminal device may measure RSRQ parameters (e.g., PSSCH-RSRQ parameters) associated with various sidelink channels to obtain the detection results.

[0100] The resource information may be used to indicate resources associated with the first RAT, which may include, for example, one or more of reserved resources of the first RAT, transmission resources of the first RAT, subchannels, candidate resource sets, logical subframes, priorities, etc.

[0101] The second RAT can obtain the first information shared by the first RAT, i.e., determine the first resource of the first RAT based on the first information, thereby performing resource selection / scheduling and further avoiding transmission collisions between the first RAT and the second RAT.

[0102] In some embodiments, the first information may include one or more of the following information of the first RAT: reserved resource-related information of the terminal device, reserved resource-related information determined based on SCI decoding, subchannel configuration information, sensing information, candidate resource sets, logical subframe-related information, priority information, and transmission resource-related information. The above information will be described in detail below.

[0103] The reserved resources of the first RAT may include reserved resources determined by the terminal device based on SCI decoding and / or reserved resources of the terminal device. The reserved resources of the terminal device may be reserved resources transmitted by the terminal device itself in the first RAT. The reserved resource-related information may include one or more pieces of information such as a count value, a transmission time, a frequency position, and a period.

[0104] The subchannel configuration information of the first RAT may include one or more of the following information: the number of subchannels, the number of physical resource blocks (PRBs) of each subchannel, etc. The subchannel configuration information is very important for determining resource overlap in the frequency domain between the reserved resources of the first RAT and the candidate single-slot resources of the second RAT based on the detection information of the time and frequency locations of the reserved resources of the terminal devices including other first RATs.

[0105] The candidate resource sets of the first RAT may include candidate resource set SA and / or candidate resource set SB.

[0106] The logical subframe-related information of the first RAT may be used to indicate information related to a slot, a frame, a subframe, etc. of the first RAT. For example, the logical subframe-related information of the first RAT may be used to indicate information such as a frame structure of the first RAT.

[0107] The priority information may be used to indicate a priority associated with the first RAT transmission. For example, the priority information may include a priority of the first RAT and / or a priority of a service of the first RAT transmission. The priority information may be determined based on SCI decoding or may be determined by the terminal device's own transmission.

[0108] The transmission resource-related information may be used to indicate resource information occupied during actual transmission of the first RAT of the terminal device, and may include, for example, time and / or frequency locations of resources used for the first RAT transmission.

[0109] The first information may further include other information related to the first RAT transmission resources. For example, the first information may include resources corresponding to half-duplex subframes of the first RAT that the terminal device does not monitor. Alternatively, the first information may include available resources of the first RAT determined based on SCI decoding and / or the terminal device's own transmissions.

[0110] As described above, the second RAT can perform resource selection / scheduling based on the first information shared by the first RAT, thereby avoiding resource conflicts. In some embodiments, the first information may be used by the first RAT. For example, the first RAT can filter the content of the first information shared by the second RAT based on information such as the SL RSRP and priority of the first RAT, thereby achieving high utilization of the first RAT's resources.

[0111] In some embodiments, for a resource pool shared by the first RAT and the second RAT, the second RAT is expected to use the first information of the first RAT. For example, a higher layer of the second RAT may request a terminal device to determine a resource subset. The higher layer may select resources from the resource subset to be used for PSSCH and / or PSCCH transmission. To trigger this process, the higher layer may provide parameters for the PSSCH and / or PSCCH transmission in slot n. According to the present application, the second RAT may determine a set of resources for new transmission or retransmission by itself by obtaining the first information T milliseconds before slot n, where T may satisfy T≦Tmax, and Tmax may be a positive integer. For example, Tmax may be 4 ms, 8 ms, etc.

[0112] In some other embodiments, the second RAT can acquire the first information within a first time window (T_win) to determine the transmission resources of the second RAT in the resource pool shared by the first RAT and the second RAT. That is, the second RAT can use the first information shared by the first RAT within the first time window (T_win) to determine the transmission resources of the second RAT in the shareable resource pool. Compared with the service period of the first RAT and the second RAT, the second RAT has a larger first time window for realizing resource selection. Alternatively, the first time window may be a period in which the first RAT updates the first information. It should be understood that the second RAT can capture the long-term service trend of the first RAT in the resource selection process, and the second RAT does not react to instantaneous fluctuations in the service mode. For example, slot n0 can be represented as a slot in which the second RAT uses the first information of the first RAT. In slot n0, the second RAT uses the first information of the first RAT in slot n. 0-T Not slower than slot n 0-T_valid All resource information in the first information of the first RAT can be used if it is not earlier than slot n 0-T is the Tth slot after n0, and T is Tmax is less than or equal to T max can be a positive integer. For example, T max may be 4 ms, 8 ms, etc. Based on these definitions, the first time window T_win is defined as T_win=T valid -T may be satisfied. T_win may be a time window during which the first information is used for resource (re)selection of the second RAT. It should be understood that T valid By specifying the value of , the second RAT can be prevented from using the timeout resource sharing information.

[0113] The present application does not limit the manner in which the second RAT obtains the first information, nor does it limit the manner in which the first RAT shares the first information.

[0114] In one implementation, the first information can be shared in the form of a buffer, and the first RAT can write the first information to the buffer and the second RAT can read the first information from the buffer.

[0115] In one implementation, the first information can be shared via a shared interface. The shared interface may be established between a physical layer of the first RAT and a physical layer of the second RAT. Alternatively, the shared interface may be established between a medium access control (MAC) layer of the first RAT and a MAC layer of the second RAT. Figure 4 illustrates an example in which the first RAT is LTE SL and the second RAT is NR SL. As shown in Figure 4, a shared interface is established between the physical layer of LTE SL and the physical layer of NR SL.

[0116] In some embodiments, the second RAT may transmit a first request message. The first request message may be used to request acquisition of the first information. The first request message may be transmitted directly to the first RAT. For example, the first request message may be transmitted to the first RAT via a shared interface. The first request message may be transmitted to a buffer. Upon receiving the first request message, the first RAT and / or the buffer may transmit the first information to the second RAT. That is, in response to the transmission of the first request message, the second RAT may receive the first information.

[0117] 5 illustrates an example in which the first RAT is LTE SL, the second RAT is NR SL, and the first information is shared via a buffer. The method illustrated in FIG. 5 may include steps S510 to S530.

[0118] Step S510: the LTE SL sends the first information to the buffer.

[0119] Step S520: The NR SL sends a first request message to the buffer, that is, the NR SL triggers the acquisition of the first information.

[0120] Note that the present application does not limit the priority of step S510 and step S520. For example, the LTE SL may first transmit the first information to the buffer, and when the first information is stored in the buffer, the NR SL may then transmit the first request message to the buffer. Alternatively, the NR SL may first transmit the first request message to the buffer, and in response to the first request message, the LTE SL may transmit the first information to the buffer to update the first information stored in the buffer.

[0121] In step S530, in response to the first request message, the NR SL can read the first information from the buffer. Alternatively, in response to the first request message, the buffer can transmit the first information. Correspondingly, in response to the first request message, the NR SL receives the first information transmitted from the buffer.

[0122] In some embodiments, the first RAT may share the first information based on one or more of a time, a message, and a pre-configuration.

[0123] In one implementation, the first RAT may share the first information based on time. For example, the first RAT may share the first information periodically. The period at which the first RAT updates (or writes) the first information may be represented by, for example, T1. The first RAT may trigger an update of the first information at a period of {T1, 2T1, 3T1...}.

[0124] In one implementation, the first RAT may share the first information based on a message. For example, when the first RAT needs to send a first message, the first RAT may share the first information. Alternatively, when the second RAT needs to send a second message, the first RAT may share the first information.

[0125] In one implementation, the first RAT may share the first information based on a pre-configured setting, which may include, for example, a period for sharing the first information, a condition for sharing the first information, etc.

[0126] In some embodiments, the second RAT may trigger acquisition of the first information based on a trigger condition related to one or more of the following information: time, service, message, pre-configuration, and detection result, each of which is described below.

[0127] In some implementations, the trigger condition may be time-related. For example, the second RAT may periodically obtain the first information shared by the first RAT. The period during which the second RAT reads the first information may be represented by, for example, T2. The second RAT may trigger the reading of the first information at a period of {T2, 2T2, 3T2...}. Taking a buffer as an example, the second RAT may periodically send a first request message. When the buffer receives the first request message, the buffer may send the first information to the second RAT. Alternatively, the first RAT may periodically update the first information it shares.

[0128] It should be noted that the first RAT may update the first information earlier than the second RAT reads the first information, thereby allowing the second RAT to obtain the latest first information.

[0129] In some implementations, the trigger condition may be related to a sensing result of the first RAT. For example, if the sensing result of the first RAT is equal to or less than a first threshold, the second RAT may acquire the first information. That is, in response to the sensing result of the first RAT being equal to or less than the first threshold, the second RAT may acquire the first information. The first threshold may be preset, set by higher layer signaling, or defined in a standard. The sensing result may include one or more measurement results of RSRP, RSRQ, and RSSI. Taking a shared interface as an example, if the sensing result of the first RAT is equal to or less than the first threshold, the MAC layer of the first RAT may trigger the MAC layer of the second RAT. Furthermore, the MAC layer of the second RAT may trigger the physical layer of the second RAT to read the first information via the shared interface.

[0130] It should be understood that if the detection result of the first RAT is equal to or less than the first threshold, the coverage effect of the first RAT is considered relatively poor, and the resources of the first RAT can be released for use by the second RAT. Thus, the detection result is related to the trigger condition, and the use of the resources of the first RAT and the second RAT can be optimized.

[0131] In some implementations, the trigger condition may be service-related, i.e., the trigger condition may include a service trigger condition. For example, the service trigger condition may relate to whether the second RAT needs to transmit service data. That is, if the service trigger condition is met, the second RAT may acquire the first information. That is, in response to the second RAT's need to transmit service data, the second RAT may acquire the first information. When the second RAT needs to transmit information such as information to be transmitted via the SL interface, information for transmitting cooperation information between terminal devices, or service data, the second RAT is considered to need to transmit data. Taking a buffer as an example, when the second RAT needs to transmit service data, the service data from the MAC layer of the second RAT may trigger the physical layer of the second RAT. The physical layer of the second RAT may trigger the transmission of a first request message. When the buffer receives the first request message, the first information shared by the first RAT may be transmitted to the second RAT.

[0132] In some communication systems (e.g., NRV2X), not all sidelink communication services are periodic. Event-triggered services are unpredictable. For example, in an emergency, the terminal device generates a brake message. Some event-triggered aperiodic service data, such as pre-collision warning information, is more important than periodically transmitted data. It is important to transmit this aperiodic information quickly and reliably. Therefore, for the sidelink transmission resource mode (i.e., mode 2) determined by the terminal device, event-triggered services require a fast sensing mechanism so that generated messages can be delivered in a timely manner. As can be seen, based on the technical solution for the service-related trigger conditions of the present application, the terminal device can quickly optimize resource allocation and avoid resource collisions, thereby meeting the need for fast and reliable data transmission.

[0133] For the entire resource set, the first RAT and the second RAT can be allowed to use the resource set in different resource allocation patterns.

[0134] In one implementation, the entire resource set can be divided into two parts, a first part and a second part. The resources of the first part may be used only for the first RAT, and the resources of the second part may be used only for the second RAT. The second RAT can obtain the status of the resources of the first part through the first information and determine the status of the resources of the second part accordingly. For example, when the first RAT is LTE SL and the second RAT is NR SL, when the NR SL performs a resource selection (or reselection) process, it excludes resources available to the LTE SL (i.e., the resources of the first part) indicated by the first information from the candidate resource set of the NR SL, that is, it can determine the resources available to the NR SL.

[0135] In some embodiments, resources of the first RAT may be excluded based on resources of the average value of the detection result. For example, if the detection result is RSSI, resources of the first RAT may be excluded based on the average S-RSSI measurement value in the statistical subframe. The exclusion of resources of the first RAT based on the average RSSI may be realized based on specific frequency resources of the S-RSSI measured in the previous subframe. That is, it is possible to exclude not all resources in a subframe, but a subset of resources in the subframe.

[0136] In another implementation, the entire resource set can be divided into three parts, namely, a first part, a second part, and a third part. The resources in the first part may be used only for the first RAT, the resources in the second part may be used only for the second RAT, and the resources in the third part may be used for both the first RAT and the second RAT. That is, the resources in the third part may be resources shared by the first RAT and the second RAT or intersecting resources. Therefore, in some embodiments, the resources in the third part may be referred to as shared transmission resources, intersecting resources, or a shared resource pool.

[0137] Note that in some embodiments, the first portion of resources may be referred to as reserved, dedicated, or pre-configured resources of the first RAT, and the second portion of resources may be referred to as reserved, dedicated, or pre-configured resources of the second RAT.

[0138] Resource allocation of the shared transmission resources may be performed by the MAC layer of the second RAT. That is, the use and allocation of the shared transmission resources require scheduling and allocation by the MAC layer of the second RAT. For example, if the second RAT is NR SL, resource allocation of the shared transmission resources may be performed by the MAC layer of NR SL. The candidate resource set SA or SB may be shared by the first RAT. The first RAT may generate the candidate resource set SB in the physical layer and ultimately report it to the upper layer. Once the first RAT generates the candidate resource set SB (which the first RAT later provides to the MAC layer of the second RAT via its internal interface), the shared transmission resources can be determined. The shared transmission resources may be, for example, resources selected from the intersection of the candidate resource sets of the first RAT and the second RAT. For example, if the second RAT is NR SL and the first RAT is LTE SL, the NR SL MAC may select resources from the intersection of the candidate resource sets obtained from NR SL and LTE SL. Therefore, it is possible to avoid selecting resources for a terminal device that is evaluated to interfere with NR and LTE SL.

[0139] If the reserved and / or configured resources of the first RAT and the second RAT are insufficient, resources can be selected from the shared transmission resource. How to allocate resources to the first RAT and the second RAT in the shared transmission resource will be described below.

[0140] In some embodiments, the first information may be used to indicate transmission resources required by the first RAT in the shared transmission resources, where the transmission resources required by the first RAT may be transmission resources actually occupied by the first RAT, transmission resources available for use by the first RAT, or transmission resources reserved by the first RAT.

[0141] According to the transmission resources of the first RAT, the second RAT can determine transmission resources required or available for the second RAT in the shared transmission resources. For example, in the shared transmission resources, resources other than the transmission resources required for the first RAT may all be transmission resources available for the second RAT.

[0142] In some embodiments, the proportion of the shared transmission resources occupied by the transmission resources required for the first RAT may be configured or predefined. For example, it may be defined as 20%, 30%, 40%, 50%, etc. Alternatively, the proportion of the shared transmission resources occupied by the first RAT may be configured based on the proportion of the reserved resources for the first RAT. In one implementation, the proportion of the reserved resources for the first RAT to the reserved resources for the second RAT may be inversely proportional to the proportion of the shared transmission resources occupied by the first RAT and the second RAT.

[0143] In some embodiments, both the first RAT and the second RAT need to use shared transmission resources. For example, if the reserved resources for the first RAT and the second RAT are both used, both the first RAT and the second RAT need to use shared transmission resources. In this case, the terminal device can preferentially allocate resources to the RAT with a larger detection result. For example, if the detection result for the first RAT is larger than the detection result for the second RAT, the terminal device preferentially allocates resources to the first RAT in the shared transmission resources. Alternatively, if the detection result for the second RAT is larger than the detection result for the first RAT, the terminal device preferentially allocates resources to the second RAT in the shared transmission resources. For example, if the NR SL RSSI is larger than the LTE SL RSSI and the reserved resources for the two RAT modes are used, the resources in the shared resource pool can first satisfy the NR SL.

[0144] In some embodiments, when either the first RAT or the second RAT needs to use the shared transmission resources, the RAT that needs the shared transmission resources may be referred to as the target RAT. That is, the target RAT may be the first RAT or the second RAT, depending on which RAT needs to use the shared transmission resources. When allocating resources in the shared transmission resources to the target RAT in the first RAT and the second RAT, only a portion of the transmission resources in the shared transmission resources can be allocated to the target RAT. That is, the shared resource pool can share transmission resources with the reserved portions of RATs other than the target RAT. For example, when the first RAT needs to use the shared transmission resources (e.g., the reserved resources for the first RAT are used and the reserved resources for the second RAT are not used), the terminal device can allocate a portion of the shared transmission resources to the first RAT, that is, not allocate all of the shared transmission resources to the first RAT, thereby sharing the transmission resources with the reserved portion of the second RAT. Alternatively, if the second RAT needs to use the shared transmission resources (for example, the reserved resources of the second RAT are already in use and the reserved resources of the first RAT are not), the terminal equipment can allocate some of the resources in the shared transmission resources to the second RAT, that is, it is possible not to allocate all of the shared transmission resources to the second RAT, thereby sharing the transmission resources with the reserved part of the first RAT.

[0145] In some embodiments, the transmission resources required for the first RAT in the shared transmission resources may be determined based on a channel busy ratio (CBR). The first RAT may determine the CBR, and the second RAT may determine the transmission resources required for the first RAT based on the CBR. In other words, the terminal device may perform resource selection and / or scheduling by detecting the availability of channels used for transmission. The size of the shared transmission resources may be further determined based on the CBR. The CBR may be determined based on a detection result. For example, the terminal device may measure RSSI parameters (e.g., SL RSSI parameters) associated with various sidelink channels to obtain the detection result. Alternatively, the terminal device may measure RSRP parameters (e.g., PSSCH-RSRP parameters) associated with various sidelink channels to obtain the detection result. Alternatively, the terminal device may measure RSRQ parameters (e.g., PSSCH-RSRQ parameters) associated with various sidelink channels to obtain the detection result. That is, when the detection result is represented by Q, Q may include one or more of RSRP, RSRQ, and RSSI.

[0146] The CBR can be determined by detecting the sensing results in the sensing timing. The sensing timing may include N subframes, and the CBR may be determined based on the sensing results of M subframes in the N subframes, where N may be an integer greater than 0 and M is an integer less than or equal to N. For example, the CBR calculation for subframe n needs to be determined based on the sensing results of M subframes. For example, the M subframes may be one or more of subframe n-1, subframe n-2, subframe n-3, ..., subframe nN. Figure 6 illustrates an example where N = 4. As shown in Figure 4, the CBR measurement estimate can be transmitted on the PSSCH for subframe n-4. That is, the CBR includes the measurement results within subframe n-4. Resources within the resource selection window can be scheduled and / or selected based on the CBR of the channel calculated in slot n.

[0147] The method for determining the CBR will be described in detail below. n may be determined based on one or more factors including an average value of the detection results of the M subframes, a change in the detection results of the M subframes, and the detection result of the subframe n-1. j Then, the average value of the detection results of M subframes can be expressed by [Equation 11]. The change status of the detection results of M subframes may include increment, decrement, or no change. The change status of the detection results of M subframes can be expressed by the detection results of subframe n-1 and subframe n-2. That is, [Equation 12] may be used to express the change status of the detection results of M subframes. Based on this, the CBR corresponding to subframe n can be calculated. n can satisfy [Equation 13], where k1, k2, and k3 are all greater than 0 and less than 1. The specific numerical values ​​of k1, k2, and k3 may be predefined values, configured values, or preset values.

[0148]

number

number

number

[0149] As described above, the size of the shared transmission resources can be further determined based on the CBR. For example, the maximum number of resource blocks (RBs) that the terminal device can use at time n can be determined based on the CBR at time n.

[0150] In some embodiments, the transmission resources required for the first RAT may be determined by a channel resource (CR). The CR may be used to represent the channel utilization rate of the terminal device. Based on the CR, the size of the transmission resources required for the first RAT and / or the second RAT in the shared transmission resource may be further determined. The above-mentioned CBR may be used to determine the channel resource (CR). For example, the larger the CBR, the smaller the available CR may be. The CBR may be a CBR limit (CBR limit ), congestion control can be performed by limiting the channel utilization rate of each terminal device. The method for determining CR will be explained in detail below.

[0151] In one implementation, the interval in which the CBR is located can correspond to the value of the CR. For example, the intervals of the CBR may include [0, 0.3], [0.3, 0.6], [0.6, 0.8], [0.8, 1], etc. These intervals can correspond to different CR values.

[0152] In one implementation, the CR evaluated at time subframe n is the total number of subchannels allowed in subframe [n, n+b] for transmission in subframe [n, n-1] divided by the total number of subchannels configured for subframe [n, n+b] in the transmission resource pool.

[0153] In some embodiments, the second RAT can obtain the first information, i.e., determine the CR of the first RAT based on the CBR, thereby further determining the resources in the shared transmission resource required for the second RAT. For example, the MAC layer of the NR SL can obtain the CBR reported from the LTE SL, thereby determining the CR of the LTE SL, which in turn further determines the resources required for the NR SL in the shared resource pool.

[0154] If both the first RAT and the second RAT need to use the shared transmission resources, the method illustrated in FIG. 3 may further include one or more of the following steps: preferentially allocating and / or allocating resources in the shared transmission resources to a RAT with a higher RAT priority; preferentially allocating and / or allocating resources in the shared transmission resources to a service with a higher service priority; preferentially allocating resources in the shared transmission resources to a transmission service compared to a reception service; and preferentially allocating and / or allocating resources in the shared transmission resources to a RAT with a PSFCH based on different RATs.

[0155] In some embodiments, if the priority of the first RAT is higher than the priority of the second RAT, the first RAT is preferentially allocated resources in the sufficient shared transmission resources, and if the priority of the second RAT is higher than the priority of the first RAT, the second RAT is preferentially allocated resources in the sufficient shared transmission resources.

[0156] In some embodiments, when the priority of the first RAT and the priority of the second RAT are the same, or when the applications in the first RAT and the second RAT both require high reliability, resources in the shared transmission resource can be preferentially allocated to a service with a higher service priority.

[0157] In some embodiments, the priority of a transmit (Tx) service may be higher than the priority of a receive (Rx) service. That is, resources in the shared transmission resource may be allocated preferentially to a transmit service compared to a receive service. For example, when the priority of an NR SL and an LTE SL is equal, an NR / LTE PSSCH transmit service may be prioritized over an LTE / NR PSSCH receive service to resolve transmission collisions between RATs. In some embodiments, an NR PSSCH transmit service may be prioritized over an LTE PSSCH receive service to further resolve collisions.

[0158] In some embodiments, resources in the shared transmission resources may be preferentially allocated and / or designated to the RAT with PSFCH based on different RATs. For example, when the transmission priority of the NR SL PSFCH and the LTE SL PSSCH are equal, transmission collisions are resolved by prioritizing NR PSFCH Tx / Rx over LTE SL Tx / Rx. For example, if there is a collision in the PSFCH, the LTE SL transmission / reception is discarded. Regarding collisions between the NR SLTx and the LTE SLTx, since PSFCH transmission / reception is a fundamental feature of NR SL, the PSFCH ensures reliable communication in NR. The present application realizes reliable transmission of the PSFCH by preferentially allocating resources in the shared transmission resources to the RAT with PSFCH, thereby realizing reliable communication corresponding to the RAT.

[0159] For some RATs (e.g., NR SL), hybrid automatic repeat request (HRAQ) retransmissions can be realized via the PSFCH. Figure 7 compares the slot structures of LTE SL and NR SL. As can be seen from this, for NR SL, the PSFCH can appear in symbols 12 and 13 of the slot, and symbol 11 can be used as a guard gap symbol between the PSSCH+PSCCH and the PSFCH. As can be seen from Figure 7, there are differences in automatic gain control (AGC) settings between a RAT that includes a PSFCH (e.g., NR SL) and a RAT that does not include a PSFCH (e.g., LTE SL) due to the influence of the PSFCH. In a shared resource pool, this situation can cause abnormal AGC settings. For example, LTE SL does not know the logical structure of the NR SL PSFCH, and the intermediate AGC settings become inaccurate, thereby adversely affecting LTE SL performance.

[0160] In some embodiments, the first RAT may be LTE SL and the second RAT may be NR SL. NR SL can identify subframes with LTE SL Tx and avoid PSFCH Tx in overlapping slots. In some implementations, NR SL can prohibit PSFCH transmission in shared transmission resources, thereby mitigating the AGC challenge. For example, if a collision with an LTE SL transmission is detected, the NR SL receiver can discard feedback transmission on the PSFCH channel. The detection can be determined based on first information shared by the first RAT.

[0161] It should be understood that discarding feedback transmissions can avoid the AGC issue, but can result in unnecessary retransmissions when packet retransmissions (unicast or groupcast) are determined based on ACK-NACK feedback, or retransmissions based on NACK-only feedback (distance-based multicast). This can result in NR SL performing finite blind retransmissions, which can reduce the reliability of NR SL. Based on this, the present application provides a PSFCH transmission frame structure to realize the transmission of PSFCH.

[0162] In some embodiments, the resources required for the second RAT include transmission resources required for the PSFCH, and the period of the transmission resources required for the PSFCH is P times the period of the transmission resources required for the first RAT, where P may be a positive integer. In the following description, the second RAT is NR SL and the first RAT is LTE SL as an example.

[0163] The transmission resources required for the PSFCH may include the slot in which the PSFCH is located. The slot in which the PSFCH is located may be associated with a reference slot. The reference slot may be the starting slot of the second RAT in the shared transmission resources. For example, assuming that the second RAT is NR, for the shared transmission resources, a basic NR resource set (or basic NR Tx resource set) defined by {n, n+1, ..., n+m} slots is configured or pre-configured in the terminal device, where n may be the reference slot. The basic NR resource set includes the (n+k1)th and (n+k2)th slots, where k1 and k2 are integers within each transmission period. The basic NR resource set may include resources used for PSSCH+PSSCH and PSFCH transmission. The basic NR transmission resource set is periodically repeated every Nth, N+Nth, N+2Nth, ..., Nth slots. In the basic NR resource set, the PSFCH and PSSCH+PSSCH share resources of the resource set.

[0164] In some embodiments, a specific slot within the entire basic NR resource set for the PSFCH can be indicated by a resource reservation interval. The resource reservation interval for the PSFCH can be specified by an NR SL higher layer. In a shared resource pool, the slots occupied by the PSFCH can be a multiple of the periodicity of the LTE SL reserved resources and overlapping slots of the NR SL resource reservations. Note that the resources for PSFCH transmission can be configured periodically or aperiodically. For example, the resources for PSFCH transmission can be determined based on a DCI format or instructions from higher layers.

[0165] In some embodiments, the period of the PSFCH may be an integer multiple of the LTE SL resource reservation period (i.e., resource reservation interval). For example, the resources required for LTE SL can be estimated based on the CBR, and the size of the resources required for NR SL can be determined by subtracting the resources required for LTE SL from the NR reserved resources.

[0166]

number

[0167] Equation (14B) can indicate that one slot out of the L slots is a slot carrying the PSFCH. For example, if L=4, then every four slots includes one PSFCH slot.

[0168]

number

[0169]

number

[0170]

number

[0171] In some embodiments, if the detection result of the second RAT is less than the detection threshold, Q may be a relatively small value, for example, Q may be less than or equal to 1.

[0172]

number

[0173] The detection threshold may be a preset value and / or may be set by an upper layer of the second RAT.

[0174] In some embodiments, when a terminal device receiving a PSCCH / PSSCH finds that the PSCCH / PSSCH resources overlap with LTE transmission resources, it can determine whether to transmit a PSFCH based on service priority / received signal strength.

[0175] In some embodiments, the terminal device may use a periodically repeating PSFCH set.

[0176] In some embodiments, when HARQ-ACK is enabled, a PSCCH / PSSCH receiving terminal device may not transmit a PSFCH on resources that overlap with LTE SL transmissions in the time domain.

[0177] In some embodiments, the transmission resources required for the PSFCH are configured or pre-configured in a shared resource pool. For other RATs that do not include a PSFCH, the resources where the PSFCH is located can be determined based on the pre-configuration or configuration situation, thereby avoiding affecting the AGC.

[0178] In some embodiments, a transmitting terminal device in LTE SL can interpret the PSFCH transmission using an RSSI mechanism. For example, using the PSFCH in NR, the terminal device can transmit the PSFCH periodically with an integer divider (RSSI averaging period) of 100 ms.

[0179] In some embodiments, it is possible to always avoid resources for transmitting LTE SL on PSFCH resources, for example, the transmitting terminal device can avoid selecting resources for PSCCH / PSSCH transmission that overlap with PSFCH resources and / or the transmitting terminal device can not transmit LTE SL on resources that overlap with PSFCCH.

[0180] In some embodiments, it may be determined whether a PSFCH resource needs to be transmitted based on the priorities of the first and second RATs.

[0181] In some embodiments, the shared transmission resources prohibit the transmission of the PSFCH. In other words, the shared transmission resources may not include resources required for the PSFCH. For example, the resources used for PSFCH transmission may only be in a resource pool dedicated to the corresponding RAT.

[0182] Note that for NR SL dedicated resources, each N slots can be configured to include resources for transmitting PSFCH feedback (ACK-NACK or NACK only) by the terminal device, where N is an integer. For example, PSFCH feedback can be transmitted once every four or eight slots.

[0183] The SCS may vary depending on the RAT. For example, the SCS for LTE SL may be 15 kHz, while the SCS for NR SL may be 30 kHz. In this case, one LTE subframe overlaps with two NR subframes. This results in a misaligned frame boundary between LTE SL and NR SL, which creates an AGC issue. For example, if an LTE transmission exists in a subframe but NR transmission is performed in only one slot of the subframe, an AGC issue occurs. NR transmission in the first slot causes a sudden drop in the power at the input of the LTE SL receiver after the first slot, affecting the AGC gain. NR transmission in the second slot causes a sudden increase in the power at the input of the LTE SL receiver at the start of the second slot. LTE SL performance may also be affected by NR SL transmissions in the same subframe. If more NR SL transmissions occur in the latter subframes of an LTE SL, the AGC results for the first LTE SL symbol are still applied to reception in the latter subframes, potentially causing the received power to exceed the maximum power threshold. In this way, the LTE SL data in the latter subframes cannot be decoded correctly.

[0184] The present application provides the following solutions to the above problems.

[0185] In some embodiments, NR transmission is limited to only subframes where there is no LTE transmission, i.e., NR SL and LTE SL subframes must be transmitted separately.

[0186] In some embodiments, NR SL transmission occurs over an entire subframe, and NR SL transmission occurs over two or more slots. When NR SL transmission occurs over multiple slots, the last symbol of the corresponding slot can be repeated to eliminate gaps at the ends of slots other than the last slot, thereby avoiding power fluctuations when transmitting between subframes.

[0187] In some embodiments, within an NR SL carrier wave, a single resource pool can be pre-configured to coexist with LTE SL and communicate with Rel-16 NR SL. Separation of the resource pool can be considered a first resource pool and a second resource pool. In the first resource pool, Rel-18 NR SL terminal devices can communicate with each other and coexist with LTE SL terminal devices within the LTE SL carrier wave. In the second resource pool, Rel-18 NR SL terminal devices communicate with Rel-16 / 17 NR SL terminal devices.

[0188] 8 is a schematic structural diagram of a terminal device 800 according to an embodiment of the present application. The terminal device 800 shown in FIG. 8 may include a first RAT and a second RAT. The terminal device 800 may include an acquiring unit 810.

[0189] The acquiring unit 810 is configured for the second RAT to acquire first information of the first RAT, the first information being used to indicate information related to a first resource of the first RAT, and both the first RAT and the second RAT are sidelink-based RATs. In some embodiments, the information related to the first resource includes sensing information and / or resource information.

[0190] In some embodiments, the resource information comprises one or more of the following information of the first RAT: reserved resource related information of the terminal device, reserved resource related information determined based on sidelink control information SCI decoding, subchannel configuration information, candidate resource sets, logical subframe related information, priority information, transmission resource related information.

[0191] In some embodiments, the sensing information is used to indicate a sensing result, and the sensing result includes one or more parameters of a reference signal received power RSRP, a reference signal received quality RSRQ, and a received signal strength indicator RSSI obtained by sensing a signal and / or a channel of a first RAT.

[0192] In some embodiments, the terminal device 800 further includes a transmitting unit configured to cause the second RAT to transmit a first request message, and the obtaining unit is specifically used for a step in which the second RAT receives the first information in response to the transmission of the first request message.

[0193] In some embodiments, the terminal device 800 further includes a sharing unit, and the sharing unit is configured in one or more of the following ways: the first RAT shares the first information based on time; the first RAT shares the first information based on a message; and the first RAT shares the first information based on a pre-configured setting.

[0194] In some embodiments, the acquisition unit is specifically used for one or more of the following steps: the second RAT periodically acquiring first information shared by the first RAT; the second RAT acquiring first information shared by the first RAT in response to a second RAT service trigger condition; and the second RAT acquiring first information shared by the first RAT in response to the detection result of the first RAT being below a first threshold.

[0195] In some embodiments, the first threshold is pre-set and / or configured by a higher layer.

[0196] In some embodiments, the terminal device 800 is further configured such that, in slot n, the second RAT provides higher layer parameters for transmission of a PSSCH and / or a PSCCH, and the acquisition unit is specifically configured such that the second RAT acquires the first information within T milliseconds before the slot n and determines transmission resources of the second RAT based on the first information, or the second RAT acquires the first information within a first time window and determines transmission resources of the second RAT based on the first information, where T is less than or equal to Tmax and Tmax is a positive integer.

[0197] In some embodiments, the first information is used to indicate transmission resources required by the first RAT in a shared transmission resource, where the shared transmission resource is shared by the first RAT and the second RAT.

[0198] In some embodiments, the proportion of the shared transmission resources required by the first RAT is configured or predefined.

[0199] In some embodiments, the terminal device 800 is further configured to have one or more of the following: when both the first RAT and the second RAT need to use the shared transmission resources, preferentially allocate resources to a RAT with a larger detection result; when a target RAT in the first RAT and the second RAT needs to use the shared transmission resources, allocate some resources in the shared transmission resources to the target RAT; and when a target RAT in the first RAT and the second RAT needs to use the shared transmission resources, reserve some resources in the shared transmission resources for RATs other than the target RAT.

[0200]

number

[0201] In some embodiments, the transmission resources required for the first RAT are determined by a channel resource CR, which is determined based on a CBR, and the CR is used to determine the size of the transmission resources required for the first RAT and / or the second RAT2 in the shared transmission resources.

[0202] In some embodiments, the method further comprises one or more of the following: preferentially allocating and / or allocating resources in the shared transmission resources to a RAT with a higher RAT priority; preferentially allocating and / or allocating resources in the shared transmission resources to a service with a higher service priority; and preferentially allocating and / or allocating resources in the shared transmission resources to a RAT with a physical sidelink feedback channel PSFCH based on different RATs.

[0203] In some embodiments, the resources required for the second RAT include transmission resources required for a PSFCH, and the periodicity of the transmission resources required for the PSFCH is P times the periodicity of the transmission resources required for the first RAT, where P is a positive integer.

[0204] In some embodiments, the transmission resources required for the PSFCH include a slot in which the PSFCH is located, and the slot in which the PSFCH is located is relative to a reference slot, and the reference slot is a start slot of the second RAT in the shared transmission resources.

[0205]

number

[0206] In some embodiments, when the detection result of the second RAT is equal to or greater than a detection threshold, R is an integer equal to or greater than 2.

[0207] In some embodiments, the detection threshold is pre-configured and / or configured by a higher layer of the second RAT.

[0208] In some embodiments, the resources required for the second RAT include transmission resources required for a PSFCH, and the location of the transmission resources required for the PSFCH in the shared transmission resources is pre-configured.

[0209] In some embodiments, the resources required for the second RAT include transmission resources required for a PSFCH, and prohibit transmission of the PSFCH in the shared transmission resources.

[0210] Figure 9 is a structural diagram of a communication device according to an embodiment of the present application. The dashed lines in Figure 9 indicate that the units or modules are optional. The device 900 in Figure 9 may be used to implement the methods described in the above method embodiments. The device 900 may be a chip, a terminal device, or a network device.

[0211] The device 900 may include one or more processors 910. The processor 910 can support the device 900 in implementing the methods described in the method embodiments above. The processor 910 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or the like. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.

[0212] The device 900 may further include one or more memories 920. The memories 920 may store programs that can be executed by the processor 910 to cause the processor 910 to perform the methods described in the method embodiments above. The memory 920 may be separate from the processor 910 or may be integrated into the processor 910.

[0213] The device 900 may further include a transceiver 930. The processor 910 may communicate with other devices or chips via the transceiver 930. For example, the processor 910 may transmit and receive data to and from other devices or chips via the transceiver 930.

[0214] An embodiment of the present application further provides a computer-readable storage medium for storing a program, which can be applied to a terminal or a network device according to the embodiment of the present application, and the program can cause a computer to execute the method performed by the terminal or the network device according to each embodiment of the present application.

[0215] An embodiment of the present application further provides a computer program product, which includes a program that can be applied to a terminal or a network device according to an embodiment of the present application, and causes a computer to execute a method performed by the terminal or the network device according to each embodiment of the present application.

[0216] The embodiments of the present application further provide a computer program, which is applicable to the terminal or network device according to the embodiments of the present application, and causes a computer to execute the method executed by the terminal or network device according to each embodiment of the present application.

[0217] It should be understood that in this application, the terms "system" and "network" may be interchangeable. Furthermore, the terms used in this application are used only to interpret specific embodiments of the application and are not intended to limit the application. The terms "first," "second," "third," "fourth," etc. in the specification, claims, and drawings of this application are used to distinguish between different objects, not to describe a particular order. Furthermore, the terms "include," "have," and any variations thereof are intended to cover a non-exclusive inclusion.

[0218] In the embodiments of the present application, the "reference" referred to may be a direct reference or an indirect reference, and may indicate an association relationship. For example, when A refers to B, it may mean that A directly refers to B, e.g., that B can be obtained by A, or that A indirectly refers to B, e.g., that A refers to C, e.g., that B can be obtained by C, and it may indicate an association relationship between A and B.

[0219] In the embodiments of the present application, "B corresponding to A" indicates that B is associated with A and B can be determined depending on A. However, determining B depending on A does not mean determining B depending on A only, and B may be determined depending on A and / or other information.

[0220] In the embodiments of the present application, the term "correspondence" may indicate a direct or indirect correspondence relationship between the two, or an association relationship between the two, such as a relationship of indicating and indicated, or a relationship of configuring and configured.

[0221] In the embodiments of the present application, "predefined" or "preconfigured" may be realized by pre-storing a corresponding code, form, or format capable of instructing related information in a device (including, for example, a terminal device and a network device), and the present application does not limit this specific implementation form. For example, "predefined" may refer to being defined in a protocol.

[0222] In the embodiments of the present application, the "protocol" may refer to a standard protocol in the communication field, and may include, for example, an LTE protocol, an NR protocol, and related protocols applied to future communication systems, but the present application is not limited thereto.

[0223] In the examples of the present application, the term "and / or" simply describes the relationship between related objects and indicates that three types of relationships exist, for example, A and / or B includes three situations: only A exists, both A and B exist, and only B exists. In addition, in this specification, the symbol " / " generally indicates that the related objects before and after it have an "or" relationship.

[0224] In various embodiments of the present application, the order of the numbers of the above processes does not indicate the order of execution, and the order of execution of each process should be determined based on the function and inherent logic, and does not constitute any limitation on the implementation process of the embodiments of the present application.

[0225] It should be understood that in some embodiments of the present application, the disclosed systems, devices, and methods can be realized in other forms. For example, the device embodiments described above are merely exemplary, and the division of the units is merely one type of logical function division. In actual implementation, other division forms may be used, for example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not implemented. Furthermore, the shown or discussed mutual couplings or direct couplings or communication connections may be indirect couplings or communication connections via several interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0226] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of the means of this embodiment according to actual needs.

[0227] Furthermore, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist physically separately, or two or more units may be integrated into one unit.

[0228] The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, all or in part may be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, they generate all or some of the procedures or functions described in the embodiments of the present application. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored on a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, radio, microwave, etc.). The computer-readable storage medium may be any available medium that can be read by a computer, or a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, tapes), optical media (e.g., digital video discs (DVDs)), or semiconductor media (e.g., solid state disks (SSDs)).

[0229] Although specific embodiments of the present application have been described above, the scope of protection of the present application is not limited thereto, and all modifications and substitutions that can be easily conceived by those skilled in the art without departing from the technical scope disclosed in the present application fall within the scope of protection of the present application. Therefore, the scope of protection of the present application should be in accordance with the scope of protection of the claims.

Claims

1. 1. A method for communications, applied to a terminal device, the terminal device including a first radio access technology RAT and a second RAT, the method comprising: The second RAT acquires first information of the first RAT; 10. The method for communication, wherein the first information is used to indicate information related to a first resource of a first RAT, and both the first RAT and the second RAT are sidelink-based RATs.

2. The method of claim 1 , wherein the information related to the first resource includes sensing information and / or resource information.

3. The resource information includes: Reservation resource related information of the terminal device; - reserved resource related information determined based on sidelink control information SCI decoding; Sub-channel configuration information; a candidate resource set; Logical subframe related information; Priority information; 3. The method of claim 2, wherein the first RAT includes one or more of the following information: transmission resource related information;

4. 4. The method according to claim 2 or 3, wherein the sensing information is used to indicate a sensing result, and the sensing result includes one or more parameters of a reference signal received power (RSRP), a reference signal received quality (RSRQ), and a received signal strength indicator (RSSI) obtained by sensing a signal and / or a channel of a first RAT.

5. The method further includes the step of the second RAT sending a first request message; The step of the second RAT acquiring first information shared by the first RAT includes:

5. The method of claim 1, further comprising receiving the first information by the second RAT in response to sending the first request message.

6. the first RAT sharing the first information based on time; The first RAT sharing the first information based on a message; The method according to any one of claims 1 to 5, further comprising one or more of: the first RAT sharing the first information based on a pre-configuration.

7. The step of the second RAT acquiring first information shared by the first RAT includes: The second RAT periodically acquires first information shared by the first RAT; In response to a service trigger condition of the second RAT, the second RAT acquires first information shared by the first RAT; and a step of the second RAT acquiring first information shared by the first RAT in response to a detection result of the first RAT being equal to or less than a first threshold.

8. 8. The method of claim 7, wherein the first threshold is preset and / or configured by a higher layer.

9. In slot n, the second RAT further includes providing higher layer parameters for transmission of a physical sidelink shared channel (PSSCH) and / or a physical sidelink control channel (PSCCH); The step of the second RAT acquiring first information of the first RAT includes: The second RAT obtains the first information within T milliseconds before the slot n, and determines a transmission resource of the second RAT based on the first information; or The second RAT acquires the first information within a first time window, and determines a transmission resource of the second RAT based on the first information; 9. The method according to claim 1, wherein T is equal to or less than Tmax, and Tmax is a positive integer.

10. The method according to any one of claims 1 to 9, characterized in that the first information is used to indicate transmission resources required by the first RAT in a shared transmission resource, and the shared transmission resource is shared by the first RAT and the second RAT.

11. 11. The method of claim 10, wherein the proportion of the transmission resources required for the first RAT to the shared transmission resources is configured or predefined.

12. If both the first RAT and the second RAT need to use the shared transmission resource, preferentially allocating resources to the RAT with a larger detection result; When a target RAT of the first RAT and the second RAT needs to use the shared transmission resources, allocating some resources of the shared transmission resources to the target RAT; and reserving some resources in the shared transmission resources for RATs other than the target RAT when the first RAT and a target RAT in the second RAT need to use the shared transmission resources.

13. The transmission resources required for the first RAT are determined by a channel busy rate (CBR), and CBRn corresponding to subframe n is [Equation 1] Fulfilling 11. The method of claim 10, wherein k1, k2, and k3 are all numbers greater than 0 and less than 1, M is the number of subframes determining CBRn, and Q indicates the detection result of the corresponding subframe.

14. 11. The method of claim 10, wherein the transmission resources required for the first RAT are determined by a channel resource CR, the CR being determined based on a CBR, and the CR being used to determine the size of the transmission resources required for the first RAT and / or the second RAT2 in the shared transmission resource.

15. preferentially allocating and / or allocating resources in the shared transmission resource to a RAT with a higher RAT priority; preferentially allocating and / or allocating resources in the shared transmission resource to services with higher service priority; and preferentially allocating and / or designating resources in the shared transmission resources to RATs with physical sidelink feedback channels (PSFCH) based on different RATs.

16. 16. The method according to claim 10, wherein the resources required for the second RAT include transmission resources required for a PSFCH, and the periodicity of the transmission resources required for the PSFCH is P times the periodicity of the transmission resources required for the first RAT, where P is a positive integer.

17. 17. The method of claim 16, wherein the transmission resources required for the PSFCH include a slot in which the PSFCH is located, the slot in which the PSFCH is located is related to a reference slot, and the reference slot is a start slot of the second RAT in the shared transmission resource.

18. 18. The method of claim 17, wherein the slot in which the PSFCH is located satisfies [Equation 2], where n indicates a position of a reference slot, Q is a scaling factor and Q is a positive number, [Equation 3] indicates a periodicity of transmission resources required for the PSFCH, and [Equation 4] indicates that one slot out of [Equation 5] slots is a PSFCH. [Equation 2] [Equation 3] [Equation 4] [Equation 5]

19. The method of claim 18 , wherein R is an integer greater than or equal to 2 when the detection result of the second RAT is greater than or equal to a detection threshold.

20. 20. The method of claim 19, wherein the detection threshold is pre-configured and / or configured by a higher layer of the second RAT.

21. 16. The method according to claim 10, wherein the resources required for the second RAT include transmission resources required for a PSFCH, and the location of the transmission resources required for the PSFCH in the shared transmission resources is preconfigured.

22. 16. The method according to claim 10, wherein the resources required for the second RAT include transmission resources required for a PSFCH, and transmission of the PSFCH is prohibited in the shared transmission resources.

23. A terminal device, a first radio access technology RAT and a second RAT; an acquiring unit configured for the second RAT to acquire first information of the first RAT; The terminal device, characterized in that the first information is used to indicate information related to a first resource of a first RAT, and the first RAT and the second RAT are both RATs based on a sidelink.

24. The terminal device of claim 23 , wherein the information related to the first resource includes sensing information and / or resource information.

25. The resource information includes: Reservation resource related information of the terminal device; - reserved resource related information determined based on sidelink control information SCI decoding; Sub-channel configuration information; a candidate resource set; Logical subframe related information; Priority information; 25. The terminal device of claim 24, wherein the transmission resource related information includes one or more pieces of information of the first RAT.

26. 26. The terminal device according to claim 24 or 25, wherein the detection information is used to indicate a detection result, and the detection result includes one or more parameters of a reference signal received power (RSRP), a reference signal received quality (RSRQ), and a received signal strength indicator (RSSI) obtained by detecting a signal and / or a channel of a first RAT.

27. The second RAT further includes a transmitting unit configured to transmit a first request message; The acquisition unit specifically includes: The terminal device according to any one of claims 23 to 26, characterized in that the second RAT is used in the step of receiving the first information in response to transmission of the first request message.

28. Further comprising a sharing unit, said sharing unit comprising: The first RAT shares the first information based on time; The first RAT shares the first information based on a message; The terminal device according to any one of claims 23 to 27, characterized in that the first RAT is configured in one or more of the following forms: a form in which the first information is shared based on a pre-setting;

29. The acquisition unit specifically includes: The second RAT periodically acquires first information shared by the first RAT; In response to a service trigger condition of the second RAT, the second RAT acquires first information shared by the first RAT; and a step of the second RAT acquiring first information shared by the first RAT in response to the detection result of the first RAT being equal to or less than a first threshold.

30. 30. The terminal device of claim 29, wherein the first threshold is pre-set and / or configured by a higher layer.

31. In slot n, the second RAT is further configured to provide higher layer parameters for transmission of a physical sidelink shared channel (PSSCH) and / or a physical sidelink control channel (PSCCH); The acquisition unit specifically includes: The second RAT obtains the first information within T milliseconds before the slot n, and determines a transmission resource of the second RAT based on the first information; or The second RAT is configured to acquire the first information within a first time window and determine a transmission resource of the second RAT based on the first information; The terminal device according to any one of claims 23 to 30, wherein T is equal to or less than Tmax, and Tmax is a positive integer.

32. The terminal device according to any one of claims 23 to 31, characterized in that the first information is used to indicate transmission resources required for the first RAT in shared transmission resources, and the shared transmission resources are shared by the first RAT and the second RAT.

33. 33. The terminal device of claim 32, wherein a proportion of the transmission resources required for the first RAT to the shared transmission resources is configured or predefined.

34. When both the first RAT and the second RAT need to use the shared transmission resource, the resource is preferentially allocated to the RAT with a larger detection result. When a target RAT of the first RAT and the second RAT needs to use the shared transmission resources, some resources of the shared transmission resources are allocated to the target RAT. and reserving some resources in the shared transmission resources for RATs other than the target RAT when a target RAT of the first RAT and the second RAT needs to use the shared transmission resources.

35. The transmission resources required for the first RAT are determined by a channel busy rate (CBR), and CBRn corresponding to subframe n is [Equation 6] Fulfilling 33. The terminal device of claim 32, wherein k1, k2, and k3 are all numbers greater than 0 and less than 1, M is the number of subframes determining CBRn, and Q indicates the detection result of the corresponding subframe.

36. 33. The terminal device of claim 32, wherein the transmission resources required for the first RAT are determined by a channel resource CR, the CR being determined based on a CBR, and the CR being used to determine the size of the transmission resources required for the first RAT and / or the second RAT2 in the shared transmission resources.

37. A form in which resources in the shared transmission resource are preferentially allocated and / or designated to a RAT with a high RAT priority; A form in which resources in the shared transmission resource are preferentially allocated and / or designated to services with high service priority; and preferentially allocating and / or assigning resources in the shared transmission resources to a RAT with a physical sidelink feedback channel (PSFCH) based on different RATs.

38. The resources required for the second RAT include transmission resources required for a PSFCH, and the period of the transmission resources required for the PSFCH is P times the period of the transmission resources required for the first RAT, where P is a positive integer. The terminal device according to any one of claims 32 to 37.

39. 39. The terminal device of claim 38, wherein the transmission resources required for the PSFCH include a slot in which the PSFCH is located, the slot in which the PSFCH is located is associated with a reference slot, and the reference slot is a start slot of the second RAT in the shared transmission resource.

40. 40. The terminal device of claim 39, wherein the slot in which the PSFCH is located satisfies [Equation 7], where n indicates the position of a reference slot, Q is a scaling factor, and Q is a positive number, [Equation 8] indicates a periodicity of transmission resources required for the PSFCH, and [Equation 9] indicates that one slot is a PSFCH every [Equation 10] slots. [Equation 7] [Equation 8] [Equation 9] [Equation 10]

41. The terminal device according to claim 40, wherein when the detection result of the second RAT is equal to or greater than a detection threshold, R is an integer equal to or greater than 2.

42. 42. The terminal device according to claim 41, wherein the detection threshold is preset and / or set by a higher layer of the second RAT.

43. The terminal device according to any one of claims 32 to 37, characterized in that the resources required for the second RAT include transmission resources required for a PSFCH, and the location of the transmission resources required for the PSFCH in the shared transmission resources is pre-configured.

44. The terminal device according to any one of claims 32 to 37, wherein the resources required for the second RAT include transmission resources required for a PSFCH, and transmission of the PSFCH is prohibited in the shared transmission resources.

45. A communication device comprising a memory and a processor, wherein the memory is used to store a program, and the processor is used to execute the method according to any one of claims 1 to 22 by calling the program in the memory.

46. A computer-readable storage medium having stored thereon a program for causing a computer to execute the method according to any one of claims 1 to 22.

47. An apparatus, comprising a processor for causing the apparatus to carry out the method according to any one of claims 1 to 22 by calling a program from a memory.

48. A chip comprising a processor that causes a device equipped with the chip to execute the method according to any one of claims 1 to 22 by calling a program from a memory.

49. A computer-readable storage medium having stored thereon a program for causing a computer to execute the method according to any one of claims 1 to 22.

50. A computer program product, characterized in that it comprises a program that causes a computer to carry out the method according to any one of claims 1 to 22.

51. A computer program, characterized in that it causes a computer to carry out the method according to any one of claims 1 to 22.

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