Signal transmission method and apparatus

Abstract

Provided in the embodiments of the present application are a signal transmission method and an apparatus. The method comprises: on the basis of a first frequency domain resource, a second frequency domain resource, a cycle length and a cycle index, determining a first time domain resource, wherein the first frequency domain resource is selected from a plurality of candidate frequency domain resources, and the second frequency domain resource is a frequency domain resource for sending in a first cycle a reference signal or a frequency domain resource determined on the basis of configuration parameters; and, on the first frequency domain resource and the first time domain resource, sending the reference signal. The present application can provide a plurality of candidate frequency domain resources for a reference signal which is periodically sent, so as to increase the possibility of sending the reference signal, improving sensing performance.

Description

Signal transmission method and device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on January 15, 2024, with application number 202410061024.1 and invention name “A Signal Transmission Method and Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The embodiments of the present application relate to the field of communications, and in particular to a signal transmission method and apparatus. Background Art

[0003] When using periodic reference signals to sense a target, in order to ensure better perception results, the reference signals need to be sent at equal time intervals on the same frequency band, otherwise the perception performance will be degraded.

[0004] Therefore, how to improve perception performance becomes an urgent problem to be solved. Summary of the Invention

[0005] The embodiments of the present application provide a signal transmission method and apparatus, which can provide multiple candidate frequency domain resources for a periodically transmitted reference signal, thereby improving perception performance.

[0006] In a first aspect, a signal transmission method is provided, which includes: determining a first time domain resource based on a first frequency domain resource, a second frequency domain resource, a cycle duration and a cycle index, wherein the first frequency domain resource is selected from multiple candidate frequency domain resources, and the second frequency domain resource is a frequency domain resource for sending the reference signal in the first cycle, or a frequency domain resource determined according to a configuration parameter; and sending a reference signal on the first frequency domain resource and the first time domain resource.

[0007] The method may be performed by a communication device, which may be a transmitting device (such as a terminal device or a network device), or a chip or circuit for a transmitting device, which is not limited in this application.

[0008] In an embodiment of the present application, multiple candidate frequency domain resources are provided for the reference signal, so that other frequency domain resources can be selected when the frequency domain resources of the originally selected reference signal are occupied. At the same time, the time domain resources are determined based on the frequency domain resources for sending the reference signal, so that the phase error caused by the frequency domain hop can be compensated in the time domain, ensuring that the reference signal can be sent as much as possible in each cycle, thereby improving the perceptual performance of sending the reference signal.

[0009] Specifically, within each period, when sending a reference signal, a frequency domain resource can be selected from multiple candidate frequency domain resources when the transmission fails or may fail, or the resource for sending the reference signal can be directly selected from multiple candidate resources. The flexibility of resource scheduling is improved, which can greatly improve the probability of sending the reference signal within each period.

[0010] In combination with the first aspect, in certain implementations of the first aspect, determining the first time domain resource based on the first frequency domain resource, the second frequency domain resource, the cycle duration and the cycle index may be determining the first time domain offset based on the first frequency domain resource, the second frequency domain resource, the cycle duration and the cycle index, wherein the first time domain offset represents the time domain offset between the first time domain resource and the second time domain resource, and the second time domain resource is the time domain resource for sending a reference signal within the first cycle; determining the first time domain resource based on the first time domain offset and the second time domain resource.

[0011] In an embodiment of the present application, the time domain resources for actually sending the reference signal in the current period are determined based on the frequency domain resources for actually sending the reference signal in the current period, the frequency domain resources originally selected for sending the reference signal, the period length, and the period index of the current period, and the time domain resources for sending the reference signal in the first period, thereby associating the offset of the time domain resources with the offset of the frequency domain resources, reducing the measurement error caused by the offset of the frequency domain resources.

[0012] In combination with the first aspect, in some implementations of the first aspect, determining the first time domain offset according to the first frequency domain resource, the second frequency domain resource, the cycle duration, and the cycle index may include determining the first time domain offset value according to the first frequency domain resource, the second frequency domain resource, the cycle duration, and the cycle index; and determining the first time domain offset according to the first time domain offset value;

[0013] The first time domain offset value offset1 satisfies the following formula:

[0014] Wherein, f′ is the frequency corresponding to the first frequency domain resource, f is the frequency corresponding to the second frequency domain resource, m is the cycle index, and T is the cycle duration.

[0015] In the embodiments of the present application, accurate time domain compensation is performed on the measurement error caused by sending reference signals on different frequency domain resources through parameter calculation, thereby achieving accurate perception on different frequency domain resources and ensuring that sending reference signals on different frequency domain resources can also achieve the equivalent effect of sending reference signals on the same frequency domain resources.

[0016] In combination with the first aspect, in certain implementations of the first aspect, determining the first time domain resource based on the first frequency domain resource, the second frequency domain resource, the cycle duration and the cycle index may be determining the third time domain resource, wherein the third time domain resource is determined based on the cycle duration, the cycle index and the second time domain resource, and the second time domain resource is the time domain resource for sending a reference signal within the first cycle; determining the second time domain offset based on the first frequency domain resource and the second frequency domain resource, wherein the second time domain offset represents the time domain offset between the first time domain resource and the third time domain resource; determining the first time domain resource based on the second time domain offset and the third time domain resource.

[0017] In an embodiment of the present application, the time domain resource for actually sending the reference signal in the current period is determined based on the time domain offset determined by the frequency domain resource for actually sending the reference signal in the current period and the second frequency domain resource and the time domain resource used to send the reference signal on the second frequency domain resource in the current period, thereby associating the offset of the time domain resource with the offset of the frequency domain resource, reducing the measurement error caused by the offset of the frequency domain resource.

[0018] In combination with the first aspect, in certain implementations of the first aspect, determining the second time domain offset based on the first frequency domain resource and the second frequency domain resource can be that the frequency corresponding to the first frequency domain resource is greater than or equal to the frequency corresponding to the second frequency domain resource, and the second time domain offset is less than or equal to 0, or the frequency corresponding to the first frequency domain resource is less than the frequency corresponding to the second frequency domain resource, and the second time domain offset is greater than 0.

[0019] In the embodiment of the present application, the time domain offset is determined according to the size relationship between the first frequency domain resource and the second frequency domain resource to compensate for the time domain, thereby reducing the measurement error caused by the offset of the frequency domain resource.

[0020] In combination with the first aspect, in some implementations of the first aspect, determining the second time domain offset according to the first frequency domain resource and the second frequency domain resource may include determining the second time domain offset value according to the first frequency domain resource, the second frequency domain resource, the cycle duration, and the cycle index; and determining the second time domain offset according to the second time domain offset value;

[0021] The second time domain offset value offset2 satisfies the following formula:

[0022] Wherein, f′ is the frequency corresponding to the first frequency domain resource, f is the frequency corresponding to the second frequency domain resource, m is the cycle index, and T is the cycle duration.

[0023] In the embodiments of the present application, accurate time domain compensation is performed on the measurement error caused by sending reference signals on different frequency domain resources through parameter calculation, thereby achieving accurate perception on different frequency domain resources and ensuring that sending reference signals on different frequency domains can also achieve the equivalent effect of sending reference signals on the same frequency domain resources.

[0024] In combination with the first aspect, in some implementations of the first aspect, the second time domain offset is smaller than the cycle duration.

[0025] In combination with the first aspect, in certain implementations of the first aspect, the method may further include: receiving first indication information, where the first indication information is used to indicate one or more of a plurality of candidate frequency domain resources, cycle durations, and second frequency domain resources.

[0026] In an embodiment of the present application, the first indication information indicates one or more of multiple candidate frequency domain resources, cycle durations and second frequency domain resources, so that the transmitting device can determine the first frequency domain resources and the first time domain resources. In addition, the indication of the first frequency domain resources and the first time domain resources within each cycle can be avoided, saving signaling overhead.

[0027] In combination with the first aspect, in certain implementations of the first aspect, the method further includes: sending second indication information, the second indication information being used to indicate at least one frequency domain resource among multiple candidate frequency domain resources, a second frequency domain resource, and one or more of a period index.

[0028] In an embodiment of the present application, by sending a second indication information to indicate at least one frequency domain resource among multiple candidate frequency domain resources, a second frequency domain resource and one or more of the period indexes, the receiving end device or other device can be aware of the frequency domain resources and time domain resources used to send reference signals in subsequent periods, so as to correctly reserve the resources required for the expected transmission of the reference signal, thereby improving the success rate of the reference signal transmission and thereby improving the perception accuracy.

[0029] In combination with the first aspect, in some implementations of the first aspect, the method further includes: performing listen-before-talk (LBT); determining the first frequency domain resource from multiple candidate frequency domain resources may be determining the first frequency domain resource from multiple candidate frequency domain resources based on the result of LBT.

[0030] In combination with the first aspect, in some implementations of the first aspect, the first frequency domain resources are different from the second frequency domain resources.

[0031] In combination with the first aspect, in certain implementations of the first aspect, a difference between frequencies corresponding to any two candidate frequency domain resources among the multiple candidate frequency domain resources is greater than a first threshold.

[0032] In a second aspect, a signal transmission method is provided, which includes: determining a first time domain resource based on a first frequency domain resource, a second frequency domain resource, a cycle duration and a cycle index, wherein the first frequency domain resource is selected from multiple candidate frequency domain resources, and the second frequency domain resource is a frequency domain resource for sending the reference signal in the first cycle, or a frequency domain resource determined according to a configuration parameter; receiving a reference signal on the first frequency domain resource and the first time domain resource.

[0033] The method may be performed by a communication device, which may be a receiving device (such as a terminal device or a network device), or a chip or circuit for a receiving device, which is not limited in this application.

[0034] In an embodiment of the present application, multiple candidate frequency domain resources are provided for the reference signal, so that other frequency domain resources can be selected when the frequency domain resources of the originally selected reference signal are occupied. At the same time, the time domain resources are determined based on the frequency domain resources of the received reference signal, so that the phase error caused by the frequency domain hop can be compensated in the time domain, ensuring that the reference signal can be received as much as possible in each cycle, thereby improving the perceptual performance of the received reference signal.

[0035] Specifically, receiving the reference signal in each period can greatly improve the probability of successful reception of the reference signal in each period and improve the flexibility of resource scheduling.

[0036] In combination with the second aspect, in certain implementations of the second aspect, determining the first time domain resource based on the first frequency domain resource, the second frequency domain resource, the cycle duration and the cycle index may be determining the first time domain offset based on the first frequency domain resource, the second frequency domain resource, the cycle duration and the cycle index, wherein the first time domain offset represents the time domain offset between the first time domain resource and the second time domain resource, and the second time domain resource is the time domain resource for receiving the reference signal within the first cycle; determining the first time domain resource based on the first time domain offset and the second time domain resource.

[0037] In an embodiment of the present application, the time domain resources for actually sending the reference signal in the current period are determined based on the frequency domain resources for actually sending the reference signal in the current period, the frequency domain resources originally selected for sending the reference signal, the period length, and the period index of the current period, and the time domain resources for receiving the reference signal in the first period, thereby associating the offset of the time domain resources with the offset of the frequency domain resources, reducing the measurement error caused by the offset of the frequency domain resources.

[0038] In combination with the second aspect, in some implementations of the second aspect, determining the first time domain offset according to the first frequency domain resource, the second frequency domain resource, the cycle duration, and the cycle index may include determining the first time domain offset value according to the first frequency domain resource, the second frequency domain resource, the cycle duration, and the cycle index; and determining the first time domain offset according to the first time domain offset value;

[0039] The first time domain offset value offset1 satisfies the following formula:

[0040] Wherein, f′ is the frequency corresponding to the first frequency domain resource, f is the frequency corresponding to the second frequency domain resource, m is the cycle index, and T is the cycle duration.

[0041] In the embodiments of the present application, accurate time domain compensation is performed on the measurement error caused by receiving reference signals on different frequency domain resources through parameter calculation, thereby achieving accurate perception on different frequency domain resources and ensuring that receiving reference signals on different frequency domains can also achieve the equivalent effect of receiving reference signals on the same frequency domain resources.

[0042] In combination with the second aspect, in certain implementations of the second aspect, determining the first time domain resource based on the first frequency domain resource, the second frequency domain resource, the cycle duration and the cycle index may be determining the third time domain resource, wherein the third time domain resource is determined based on the cycle duration, the cycle index and the second time domain resource, and the second time domain resource is the time domain resource for receiving the reference signal within the first cycle; determining the second time domain offset based on the first frequency domain resource and the second frequency domain resource, wherein the second time domain offset represents the time domain offset between the first time domain resource and the third time domain resource; determining the first time domain resource based on the second time domain offset and the third time domain resource.

[0043] In an embodiment of the present application, the first time domain resource is determined based on the time domain offset determined based on the frequency domain resource for actually receiving the reference signal and the time domain resource for receiving the reference signal on the second frequency domain resource in the current period, thereby associating the offset of the time domain resource with the offset of the frequency domain resource, thereby reducing the measurement error caused by the offset of the frequency domain resource.

[0044] In combination with the second aspect, in certain implementations of the second aspect, determining the second time domain offset based on the first frequency domain resource and the second frequency domain resource can be that the frequency corresponding to the first frequency domain resource is greater than or equal to the frequency corresponding to the second frequency domain resource, and the second time domain offset is less than or equal to 0, or the frequency corresponding to the first frequency domain resource is less than the frequency corresponding to the second frequency domain resource, and the second time domain offset is greater than 0.

[0045] In the embodiment of the present application, the time domain offset is determined according to the size relationship between the first frequency domain resource and the second frequency domain resource to compensate for the time domain, thereby reducing the measurement error caused by the offset of the frequency domain resource.

[0046] In combination with the second aspect, in some implementations of the second aspect, determining the second time domain offset according to the first frequency domain resource and the second frequency domain resource may include determining the second time domain offset value according to the first frequency domain resource, the second frequency domain resource, the cycle duration, and the cycle index; and determining the second time domain offset according to the second time domain offset value;

[0047] The second time domain offset value offset2 satisfies the following formula:

[0048] Wherein, f′ is the frequency corresponding to the first frequency domain resource, f is the frequency corresponding to the second frequency domain resource, m is the cycle index, and T is the cycle duration.

[0049] In the embodiments of the present application, accurate time domain compensation is performed on the measurement error caused by receiving reference signals on different frequency domain resources through parameter calculation, thereby achieving accurate perception on different frequency domain resources and ensuring that receiving reference signals on different frequency domains can also achieve the equivalent effect of receiving reference signals on the same frequency domain resources.

[0050] In combination with the second aspect, in some implementations of the second aspect, the second time domain offset is smaller than the cycle duration.

[0051] In combination with the second aspect, in certain implementations of the second aspect, the method may further include: receiving first indication information, where the first indication information is used to indicate one or more of a plurality of candidate frequency domain resources, cycle durations, and second frequency domain resources.

[0052] In an embodiment of the present application, the first indication information indicates one or more of multiple candidate frequency domain resources, cycle durations and second frequency domain resources, so that the receiving device can determine the first frequency domain resources and the first time domain resources, thereby avoiding the indication of the first frequency domain resources and the first time domain resources in each cycle and saving signaling overhead.

[0053] In combination with the second aspect, in certain implementations of the second aspect, the method further includes: receiving second indication information, the second indication information being used to indicate at least one frequency domain resource among multiple candidate frequency domain resources, a second frequency domain resource, and one or more of a period index.

[0054] In an embodiment of the present application, by receiving a second indication information indicating at least one frequency domain resource among multiple candidate frequency domain resources, a second frequency domain resource and one or more of the period indexes, the receiving end device or other device can know the frequency domain resources and time domain resources used to send reference signals in subsequent periods, so as to correctly reserve the resources required for the expected transmission of the reference signal, thereby improving the success rate of reference signal reception and thereby improving the perception accuracy.

[0055] In combination with the second aspect, in some implementations of the second aspect, the first frequency domain resources are different from the second frequency domain resources.

[0056] In combination with the second aspect, in certain implementations of the second aspect, a difference between frequencies corresponding to any two candidate frequency domain resources among the multiple candidate frequency domain resources is greater than a first threshold.

[0057] In a third aspect, a communication device is provided, the device being configured to execute the method provided in either the first or second aspect. Specifically, the device may include units and / or modules, such as a processing unit and / or a communication unit, configured to execute the method provided in any implementation of either the first or second aspect.

[0058] In one implementation, the apparatus is a communication device (e.g., a receiving device or a transmitting device). When the apparatus is a communication device, the communication unit may be a transceiver or an input / output interface; the processing unit may be at least one processing circuit, such as a processor or a circuit within a processor that is used for processing functions. Alternatively, the transceiver may be a transceiver circuit. Alternatively, the input / output interface may be an input / output circuit.

[0059] In another implementation, the apparatus is a chip, chip system, or circuit used in a communication device. When the apparatus is a chip, chip system, or circuit used in a terminal device, the communication unit may be an input / output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip, chip system, or circuit; and the processing unit may be at least one processor, processing circuit, or logic circuit.

[0060] In a fourth aspect, a communication device is provided, comprising: at least one processing circuit for executing the method provided in any implementation of any one of the first or second aspects above.

[0061] In one implementation, the apparatus is a communication device (eg, a receiving device or a transmitting device).

[0062] In another implementation, the apparatus is a chip, a chip system, or a circuit used in a communication device.

[0063] The communication device may include a transceiver circuit. When the device is a communication device, the transceiver circuit may be a transceiver. When the device is a chip, chip system or circuit for a communication device, the transceiver circuit may be an interface circuit or an input-output circuit.

[0064] Optionally, the at least one processing circuit can be used to execute a computer program or instruction stored in a memory to perform the method provided in any implementation of any of the first or second aspects. The memory can be located inside the communication device or outside the communication device.

[0065] Optionally, the communication device further includes the memory.

[0066] In a fifth aspect, the present application provides a processing circuit (or processor) for executing the methods provided in the above aspects.

[0067] For operations such as sending and acquiring / receiving involved in the processing circuit (or processor), unless otherwise specified, or if they do not conflict with their actual function or internal logic in the relevant description, they can be understood as operations such as processing circuit output and input, or as sending and receiving operations performed by the radio frequency circuit and antenna. This application does not limit this.

[0068] In a sixth aspect, a computer-readable storage medium is provided, which stores a program code for execution by a device, and the program code includes a method provided by any implementation manner for executing any aspect of the first or second aspect mentioned above.

[0069] In a seventh aspect, a computer program product comprising instructions is provided, which, when run on a computer, enables the computer to execute the method provided by any implementation of any of the first or second aspects above.

[0070] In an eighth aspect, a chip is provided, which includes a processing circuit and a communication interface. The processing circuit reads instructions stored in a memory through the communication interface and executes the method provided by any implementation of any aspect of the first or second aspect.

[0071] Optionally, as an implementation method, the chip also includes a memory, in which a computer program or instruction is stored, and the processing circuit is used to execute the computer program or instruction stored in the memory. When the computer program or instruction is executed, the processing circuit is used to execute the method provided in any implementation method of any aspect of the first or second aspect above.

[0072] In a ninth aspect, a communication system is provided, comprising the aforementioned communication device, such as a communication device that executes the method provided in any one of the implementations in the first aspect, and a communication device that executes the method provided in any one of the implementations in the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] FIG1 is a schematic diagram of an example communication scenario to which an embodiment of the present application can be applied.

[0074] FIG2 is a schematic diagram of currently sending a reference signal according to a single pattern.

[0075] FIG3 is a schematic flowchart of a signal transmission method according to an embodiment of the present application.

[0076] FIG4 is a schematic diagram of a reference signal pattern according to an embodiment of the present application.

[0077] FIG5 is a schematic diagram of a signal transmission method according to another embodiment of the present application.

[0078] FIG6 is a schematic diagram of a signal transmission method according to yet another embodiment of the present application.

[0079] 7-8 are schematic diagrams of a resource reservation method provided in an embodiment of the present application.

[0080] FIG9 is a schematic diagram of a communication device provided in an embodiment of the present application.

[0081] FIG10 is a schematic diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0082] The technical solution in this application will be described below with reference to the accompanying drawings.

[0083] The technical solutions provided in this application can be applied to various communication systems, such as: fifth generation (5G) or new radio (NR) systems, long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, etc. The technical solutions provided in this application can also be applied to future communication systems, such as the sixth generation mobile communication system. The technical solutions provided in this application can also be applied to sidelink (SL) communication, vehicle-to-everything (V2X) communication, machine-to-machine (M2M) communication, machine type communication (MTC), and Internet of Things (IoT) communication systems or other communication systems. As an example, V2X may include vehicle-to-vehicle (V2V), vehicle-to-pedestrian (V2P), and vehicle-to-infrastructure (V2I). The infrastructure is, for example, a road side unit (RSU) or a network device. The technical solution provided in this application can also be applied to scenarios of licensed spectrum and scenarios of unlicensed spectrum.

[0084] The terminal devices in the embodiments of the present application include various devices with wireless communication functions, which can be used to connect people, objects, machines, etc. The terminal devices can be widely used in various scenarios, such as: cellular communication, SL, V2X, peer to peer (P2P), M2M, MTC, IoT, virtual reality (VR), augmented reality (AR), industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wearable, smart transportation, smart city drones, robots, remote sensing, passive sensing, positioning, navigation and tracking, autonomous delivery, etc. The terminal device can be a terminal in any of the above scenarios, such as an MTC terminal, an IoT terminal, etc. The terminal device may be user equipment (UE), terminal, fixed device, mobile station device or mobile device of the 3rd Generation Partnership Project (3GPP) standard, subscriber unit, handheld device, vehicle-mounted device, wearable device, cellular phone, smart phone, Session Initiation Protocol (SIP) phone, wireless data card, personal digital assistance (PDA), computer, tablet computer, notebook computer, wireless modem, handheld device, laptop computer, computer with wireless transceiver function, smart book, vehicle, satellite, global positioning system (GPS) device, target tracking device, aircraft (such as drone, helicopter, multi-rotor helicopter, or airplane), ship, remote control device, smart home device, industrial equipment, or a device built into the above devices (such as a communication module, modem or chip in the above devices), or other processing devices connected to the modem.

[0085] It should be understood that in some scenarios, a terminal device can also be used to act as a base station. For example, a terminal device can act as a scheduling entity that provides sidelink signals between terminal devices in scenarios such as V2X, SL, or P2P.

[0086] In the embodiments of the present application, the device for implementing the function of the terminal device, i.e., the terminal device, can be the terminal device, or a device capable of supporting the terminal device to implement the function, such as a chip system or chip, which can be installed in the terminal device. In the embodiments of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices.

[0087] The network device in the embodiment of the present application can be a device for communicating with a terminal device, and the network device can also be referred to as an access network device or a wireless access network device, such as a base station. The base station can broadly cover the various names below, or be replaced with the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmission point (TRP), transmitting point (TP), master station, auxiliary station, multi-standard wireless (motor slide retainer, MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. A 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, a modem, or a chip used to be provided in the aforementioned device or apparatus. A base station may also be a mobile switching center and a device that performs base station functions in D2D, V2X, and M2M communications, a network-side device in a 6G network, or a device that performs base station functions in future communication systems. A base station may support networks with the same or different access technologies. The embodiments of this application do not limit the specific technology and specific device form adopted by the network equipment.

[0088] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0089] In the embodiments of the present application, the apparatus for implementing the functions of the network device may be an independent network device, or a discrete device and software that can support the network device in implementing the functions. When the software and hardware are combined to implement the functions of the network device, the apparatus may be installed in the network device. In the embodiments of the present application, the chip system may be composed of a chip, or may include a chip and other discrete components.

[0090] Network devices and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on aircraft, balloons and satellites in the air. The embodiments of this application do not limit the scenarios in which network devices and terminal devices are located. In addition, terminal devices and network devices can be hardware devices, or they can be software functions running on dedicated hardware, software functions running on general-purpose hardware, such as virtualization functions instantiated on a platform (e.g., a cloud platform), or entities including dedicated or general-purpose hardware devices and software functions. This application does not limit the specific forms of terminal devices and network devices.

[0091] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. In the description of the present application, unless otherwise specified, " / " indicates that the objects associated before and after are in an "or" relationship. For example, A / B can represent A or B. The "and / or" in the present application is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. In addition, in the description of the present application, unless otherwise specified, "multiple" refers to two or more than two. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, c can be single or multiple. In addition, in order to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish between identical or similar items with substantially the same functions and effects. Those skilled in the art will understand that words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not necessarily limit differences. At the same time, in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or design schemes. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete way for easy understanding.

[0092] In addition, the network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Ordinary technicians in this field can know that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0093] FIG1 is a schematic diagram of an example communication scenario to which an embodiment of the present application can be applied.

[0094] As shown in FIG1 , the communication system 100 may include a first network device 110 and a sensing object 120. The sensing object 120 may be a terminal device or other object, such as a person, a car, or other objects. When the first network device 110 needs to obtain the status of the sensing object 120, such as the distance, speed, etc., the first network device 110 may act as a sensing device to send a reference signal to the sensing object 120, thereby obtaining status information such as the distance and speed of the sensing object 120 based on the reflected signal of the received reference signal. Hereinafter, the embodiment of the present application is described in terms of a scenario in which the speed of the sensing object 120 is obtained through a reference signal. However, the scope of the embodiment of the present application is not limited to obtaining the speed of the sensing object 120, and may also be used to obtain other status information.

[0095] The reflected signal of the received reference signal is also the received reference signal, and the two are not distinguished hereinafter.

[0096] The perception device described in the embodiment of the present application may refer to a device that sends a reference signal, or may refer to a device that receives a reference signal, or may refer to a device that needs to obtain status information of the perception object 120. This application does not limit this.

[0097] The communication system 100 may further include a second network device 130. After the first network device 110 transmits a reference signal, the reference signal can be received by the first network device 110 or the second network device 130 after being reflected by the sensing object 120. If the sensing object 120 is a terminal device, the sensing object 120 may also serve as a receiving end device of the reference signal. After receiving the reference signal, the sensing object 120 may obtain channel information based on the reference signal, thereby analyzing the state information of the sensing object 120. The sensing object 120 may also report the measurement results to the first network device.

[0098] The communication system 100 may further include a first terminal device 140. After the first network device 110 sends the reference signal, the reference signal can be reflected by the sensing object 120 and then received by the first terminal device 140.

[0099] The reference signal may also be sent by the first terminal device 140. After being reflected by the sensing object 120, the reference signal may be received by a network device (e.g., the first network device 110); it may also be received by the first terminal device 140 or another terminal device (e.g., the second terminal device 150). If the sensing object 120 is a terminal device, the sensing object may also receive the reference signal.

[0100] The network device can configure the reference signal parameter information to the terminal device through signaling, instructing the terminal device to send or receive the reference signal according to the configuration. For example, the signaling can be radio resource control (RRC) signaling, media access control layer control element (MAC-CE) signaling, or downlink control information (DCI).

[0101] The first network device 110 or the first terminal device 140 may also transmit a reference signal on an unlicensed spectrum. When the reference signal is transmitted using the unlicensed spectrum, the reference signal transmitted by the first network device 110 or the first terminal device 140 can be received by the first terminal device after being reflected by the sensing object 120, can also be received by other terminals (e.g., the second terminal device 150), and can also be received by a network device (e.g., the first network device 110). If the sensing object 120 is a terminal device, the reference signal can also be received by the sensing object 120.

[0102] When the first terminal device 140 sends a reference signal and other terminal devices serve as receiving devices, taking the sidelink as an example, the first terminal can also send sidelink control information (SCI), which is carried in the physical sidelink control channel (PSCCH). Other terminal devices can receive the reference signal based on the parameters of the reference signal configured by the SCI.

[0103] When the first terminal device 140 sends a reference signal, taking the SL scenario as an example, the terminal device may also adopt an autonomously selected resource allocation method, that is, before sending a signal, it listens to the resource reservation information sent by other terminal devices and measures the corresponding received power, and selects resources that are not reserved by other terminal devices or are reserved by other terminal devices but have lower received power, so as to avoid interference between terminal devices due to occupying the same transmission resources in advance. This resource allocation method may also be called mode 2.

[0104] In the perception scenario, taking the acquisition of the speed of the perception object 120 as an example, when it is necessary to measure the speed of the perception object 120 through a reference signal, the speed of the perception object 120 is usually measured by periodically sending the reference signal in the same frequency band. In order to ensure better perception results, it is necessary to ensure that the frequency band position remains unchanged and the time interval for sending the reference signal remains unchanged. If the reference signal is sent by jumping to other frequency bands in certain periods, or the reference signal is not sent at equal time intervals, additional phase errors will be introduced and the perception performance will be reduced. In addition, when sending a reference signal on an unlicensed spectrum, in order to avoid interference, a listen before talk (LBT) detection is required before sending the reference signal, which is also called a monitoring avoidance mechanism. If the LBT fails, the channel cannot be accessed to send the reference signal, which will cause the reference signal to fail to be sent, thereby affecting the perception performance.

[0105] A frequency band can refer to a bandwidth part (BWP), a resource block (RB), a resource block set (RB set), a subchannel, an interlace, or an interlace group. An RB consists of 12 resource elements (REs), and one RE corresponds to one subcarrier in the frequency domain. For example, a frequency band can refer to an RB set with a bandwidth of 20 MHz.

[0106] FIG2 is a schematic diagram of currently sending a reference signal according to a single pattern.

[0107] As shown in Figure 2(a), the current method of sending reference signals in a single pattern uses a method of sending reference signals at equal intervals T (or a single pattern) over the same frequency band. For example, if a sensing device receives a reflected signal after sending a reference signal and there is only a single sensing object, and the reference signal is sent at a frequency of f and a transmission period of T, the signal received in the mth period can be expressed as: Where m is the cycle index, c represents the speed of light, R is the distance between the sensing object and the sensing device, v represents the relative speed between the sensing device and the sensing object, σ is the power attenuation factor, and d TX [m] is the reference signal sent by the transmitting device. RX [m] divided by the known reference signal d TX [m] can get the channel information of the mth cycle The relative speed between the sensing device and the object causes the phase of the channel information to change over time. Therefore, the object's speed can be estimated based on the phase information of signals received at different periods. This can be done by performing a Fourier transform on the channel information obtained at different periods to obtain the channel's Doppler spectrum. The peak of the Doppler spectrum corresponds to the speed of the object relative to the sensing device. Alternatively, the object's speed can be estimated based on signals received at different periods using other algorithms such as multiple signal classification (MSSC) and artificial intelligence (AI).

[0108] As shown in (b) of Figure 2, the above method may fail LBT in certain periods under unlicensed spectrum. That is, if the channel is detected to be occupied, the reference signal will fail to be sent in that period, resulting in a degradation of perceived performance. For example, in (b) of Figure 2, the dotted shadows represent the reference signal that is normally sent, and the grid shadows represent the situation where the reference signal cannot be sent due to occupancy.

[0109] Even in scenarios where LBT isn't required, such as licensed spectrum, the reference signal pattern is relatively simple, and resource scheduling is inflexible. Reference signals can only be sent on fixed frequency resources in each cycle. Higher-priority services may require resources in certain cycles, causing resource collisions. This is especially likely in scenarios where high speed measurement resolution and accuracy are required, leading to longer total sensing times.

[0110] In order to increase the probability of successful reference signal transmission in each period, thereby improving the perceived performance, the embodiment of the present application provides a more flexible resource scheduling method.

[0111] The signal transmission method provided by the embodiment of the present application will be described in detail below with reference to the accompanying drawings. The embodiment provided by the present application can be applied to the communication system shown in FIG1 above without limitation.

[0112] In the following embodiments, for ease of description, the device that sends the reference signal is referred to as a transmitting device, and the device that receives the reference signal is referred to as a receiving device. The transmitting device may be a network device or a terminal device, and the receiving device may be a network device or a terminal device. The embodiments shown below do not particularly limit the specific structure of the execution subject of the method provided in the embodiments of the present application. As long as it is possible to communicate according to the method provided in the embodiments of the present application by running a program that records the code of the method provided in the embodiments of the present application, for example, the execution subject of the method provided in the embodiments of the present application may be a receiving device or a transmitting device, or a functional module in the receiving device or the transmitting device that can call and execute the program, for example, it may be a chip or chip system installed in the receiving device or the transmitting device. Below, without loss of generality, the method provided in the embodiments of the present application is described in detail by taking the interaction between the receiving device and the transmitting device as an example.

[0113] FIG3 is a schematic flow chart of a signal transmission method according to an embodiment of the present application. The method 300 may include:

[0114] 310. The transmitting end device determines the first time domain resource according to the first frequency domain resource, the second frequency domain resource, the cycle duration and the cycle index.

[0115] Frequency domain resources may include one or more frequency domain units. A frequency domain unit may be an RB, a subcarrier, a resource block group (RBG), a predefined subband, a precoding resource block group (PRBG), a BWP, an RE (also known as a resource unit or resource element), a carrier, or a serving cell. This is not limited.

[0116] The time domain resources may include one or more time domain units (or time units). A time domain unit may be a symbol, an orthogonal frequency division multiplexing (OFDM) symbol, a mini-slot, a slot, a partial slot, a subframe, or a radio frame.

[0117] The first frequency domain resource is selected from multiple candidate frequency domain resources and is used to send a reference signal. The first frequency domain resource can be a single frequency domain resource or multiple frequency domain resources. When the first frequency domain resource is multiple frequency domain resources, the transmitting device can send multiple reference signals within a period. The receiving device can jointly process these reference signals to improve perception accuracy.

[0118] It should be understood that the frequency domain ranges corresponding to multiple candidate frequency domain resources are different, that is, the frequency domain ranges of multiple candidate frequency domain resources will not completely overlap. For example, the frequency domain ranges of multiple candidate frequency domain resources do not overlap at all, or the frequency domain ranges of multiple candidate frequency domain resources partially overlap.

[0119] The multiple candidate frequency domain resources may be configured or predefined by the network device, or may be determined by the terminal device.

[0120] The reference signal is sent in multiple periods, so as to facilitate the perception of the state information of the target (i.e., the perception object mentioned above), for example, to facilitate the perception of the moving speed of the target. Among them, the second frequency domain resource can be the frequency domain resource for sending the reference signal in the first period of the multiple periods, or it can be the frequency domain resource that should send the reference signal in a traditional way, or it can be the frequency domain resource for sending the reference signal configured by the high layer, that is, it can be the frequency domain resource determined according to the configuration parameters. It should be understood that the first period can be the first reference signal sent in the first period of multiple periods for a certain perception process, or it can be the first reference signal sent for a certain target, or it can be the first reference signal sent for different perception processes of the same target, and different perception processes can have different first periods. Among them, the configuration parameters can be configured through signaling, such as RRC signaling, MAC CE signaling or DCI.

[0121] In the frequency domain, each reference signal may occupy multiple subcarriers continuously, or occupy multiple subcarriers discontinuously in a comb-tooth structure, and this application does not impose any restrictions on this.

[0122] 320. The transmitting device sends a reference signal.

[0123] Specifically, the transmitting device sends a reference signal on a first frequency domain resource and a first time domain resource.

[0124] Correspondingly, the receiving device can receive the reference signal on the first frequency domain resource and the first time domain resource.

[0125] The process of determining the first frequency domain resource and the first time domain resource and the step of sending the reference signal can be completed by the same device or by different devices. Multiple devices working together to complete the method provided in the embodiment of the present application are also considered to use the solution provided in the present application.

[0126] In this embodiment of the present application, multiple candidate frequency domain resources are provided for the reference signal. This allows alternative frequency domain resources to be selected when the originally selected frequency domain resource for the reference signal is occupied in certain periods, ensuring that the reference signal is transmitted as much as possible in each period. Furthermore, the time domain resource is determined based on the frequency domain resource used to transmit the reference signal. This compensates for phase errors in the time domain caused by the different frequency domain resources used to transmit the reference signal in different periods, thereby improving perception performance.

[0127] The following describes the pattern of the reference signal applicable to the embodiment of the present application in conjunction with Figure 4. As shown in the pattern of the reference signal in (a) of Figure 4, Figure 4 shows 5 candidate frequency domain resources, namely CH0, CH1, CH2, CH3, and CH4 channels, and their corresponding frequencies are from small to large. Referring to (a) in Figure 4, the diagonal shading represents the candidate time-frequency resources for sending the reference signal in each period. Each period can send the reference signal only on one candidate time-frequency resource or on multiple candidate time-frequency resources. Therefore, in the embodiment of the present application, there can be multiple patterns for actually sending the reference signal. If the reference signal is sent only on CH2 in each period, that is, the reference signal is sent according to the single pattern shown in (a) of Figure 2, the time interval for sending the reference signal between adjacent periods is the same, that is, the reference signal is sent at equal time intervals T on the same frequency band CH2. In the embodiment of the present application, different frequency domain resources can be selected to send reference signals in different periods, and the resource scheduling method is more flexible. CH2 can be regarded as the second frequency domain resource mentioned above, or called the basic frequency domain resource. The time domain resources corresponding to the second frequency domain resource in different periods are distributed at equal time intervals. As mentioned above, the reference signal can be sent in multiple cycles, and the time intervals between adjacent cycles in the multiple cycles can be the same or different. For example, the time interval for sending the reference signal between the first cycle and the second cycle can be different from the interval for sending the reference signal between the second cycle and the third cycle. The cycle duration in the embodiment of the present application can be considered as the time interval between adjacent time domain resources when the reference signal is sent at equal intervals on the second frequency domain resource. Although different frequency domain resources are selected to send reference signals in different cycles, the time domain resources for sending reference signals can be adjusted to equivalently achieve the sending of reference signals at equal time intervals on the basic frequency domain resources. At this time, the intervals for sending reference signals between adjacent cycles are no longer exactly the same. (b) in Figure 4 shows an example of a pattern for actually sending a reference signal, and the dotted shading represents the time-frequency resources for actually sending the reference signal. The time intervals T1, T2, and T3 for sending reference signals between adjacent cycles are not equal to each other.

[0128] In the time domain, each reference signal can occupy one or more time domain units (such as symbols). As an example, the time interval for sending a reference signal can be the interval of the starting time domain positions, the interval of the middle time domain positions or the interval of the ending time domain positions of two reference signals of adjacent periods, or it can also be the interval between the ending time domain position of the previous reference signal and the starting time domain position of the next reference signal, or it can also be the interval between the starting time domain position of the previous reference signal and the ending time domain position of the next reference signal. The accompanying drawings of the embodiments of the present application take the interval of the starting time domain positions of two reference signals of adjacent periods as an example, but the present application does not limit this. Among them, the starting time domain position of the reference signal indicates the starting position of the time domain resource for sending the reference signal; the ending time domain position of the reference signal indicates the ending position of the time domain resource for sending the reference signal; the middle time domain position of the reference signal indicates any other position of the time domain resource for sending the reference signal except the starting position and the ending position.

[0129] The process of determining the time domain resources for sending the reference signal in each period is described below with reference to FIG. 5 .

[0130] In the method provided in the embodiment of the present application, there can be multiple opportunities to send reference signals in each cycle. For example, in an unlicensed spectrum, the entire bandwidth can be divided into multiple LBT channels (for example, FR1 frequency band, B=20MHz) with a certain bandwidth B as the granularity, allowing each LBT channel to perform channel access separately. If the channel access fails on the LBT channel that originally sent the reference signal in some cycles, it can jump to the adjacent LBT successful channel to send. As shown in Figure 5, there are 5 LBT channels in the 100MHz system bandwidth, namely CH0, CH1, CH2, CH3 and CH4, and their corresponding frequencies are from small to large. Assuming that the reference signal is periodically sent on CH2 at the beginning, the frequency domain position of the second frequency domain resource is CH2, and the time corresponding to the time domain position is an integer multiple of T (the first cycle corresponds to the time t=0). However, the second cycle (m=1, corresponding to the time T) fails LBT on CH2 (corresponding to frequency f), then LBT can be continued on CH1 and CH0. Assuming that the subsequent LBT is successful on CH1, as shown in Figure 5, the reference signal can be sent on the CH1 channel. In addition, to prevent LBT failures on CH2 in certain cycles, LBT can be performed on CH3 and CH4 in advance. If LBT succeeds, the reference signal for the current cycle can be sent on CH3 / CH4 in advance. For example, if LBT succeeds on CH3 in the fifth cycle, the reference signal can be sent on CH3. Therefore, the probability of sending a reference signal in each cycle can be increased by N times, where N represents the number of LBT channels. For example, in Figure 5, the probability of sending a reference signal in each cycle is increased by 5 times.

[0131] However, the change in the frequency domain position of the reference signal requires that the corresponding time domain position meet certain constraints. Generally speaking, the movement of the target will affect the signal received in each period, causing the phase of the signals received in different periods to change. The speed of the target can be estimated based on the phase of the signals received in multiple periods. When the reference signal is no longer sent on the originally selected second frequency domain resource in certain periods, but jumps to other frequency domain resources to send the reference signal, additional phase error will be introduced. For example, if the reference signal is sent on the second frequency domain resource with a frequency of f in the m+1th period, the channel information obtained based on the received reference signal can be expressed as If the reference signal is sent on the first frequency domain resource with a frequency of f′ during the period, the channel information is expressed as in Compared with the original Introduces a distance-dependent phase error The phase error related to the distance can be compensated by calculation, for example, by estimating the distance of the target in advance, which is not limited in this application. However, the frequency domain jump introduces a phase error related to the target speed. This will lead to a decrease in perception performance. In the above formula, v is the target speed, c is the speed of light, and T is the cycle time.

[0132] In order to compensate for the phase error related to the target speed, the reference signal can be sent in the time domain with a delay or in advance. Referring to Figure 5, assuming that the starting time domain position of the reference signal sent in the first cycle is t=0, the time domain resource corresponding to the starting time domain position is the second time domain resource. The reference signal should be sent at t=mT on the frequency f in the m+1th cycle, where T is the cycle length. For example, the reference signal is sent at mT+ΔT on the frequency f′ in the m+1th cycle (for example, if the reference signal fails to be sent in the second cycle in Figure 5, it is sent at T+ΔT1, and if the reference signal fails to be sent in the fifth cycle, it is sent at 4T+ΔT2). In order to compensate for the phase error related to the target speed introduced by sending the reference signal at different frequencies, the phase related to the target speed in the two sending modes can be made as equal as possible by introducing a time domain offset value ΔT. As an example, the time domain offset value can satisfy the following formula

[0133] Where v is the target velocity and c is the speed of light.

[0134] From the calculation results of the above formula, it can be obtained that when ff′>0, that is, the frequency f′ corresponding to the first frequency domain resource for actually sending the reference signal is less than the frequency f corresponding to the second frequency domain resource, ΔT>0, that is, the time domain resource for actually sending the reference signal lags behind the time domain resource corresponding to the single pattern in the m+1th period; when ff′<0, that is, the frequency f′ corresponding to the frequency domain resource for actually sending the reference signal is greater than the frequency f corresponding to the second frequency domain resource, ΔT<0, that is, the time domain resource for actually sending the reference signal is ahead of the time domain resource corresponding to the single pattern in the m+1th period. It can be understood that the time domain resource corresponding to the single pattern in the m+1th period is the time domain resource that would have been corresponding if the reference signal had been sent on the second frequency domain resource in the m+1th period.

[0135] Optionally, determining the first time domain resource based on the first frequency domain resource, the second frequency domain resource, the cycle duration, and the cycle index in step 310 includes: determining a first time domain offset based on the first frequency domain resource, the second frequency domain resource, the cycle duration, and the cycle index; and determining the first time domain resource based on the first time domain offset and the second time domain resource. The first time domain offset represents the time domain offset between the first time domain resource and the second time domain resource, and the second time domain resource may be a time domain resource for sending a reference signal within the first cycle. As an example, the second time domain resource may also be determined based on a configuration parameter, which is configured by a high-level device configuration or by the network side, such as a starting time domain position for sending a reference signal.

[0136] The cycle index can be a parameter associated with the current cycle, and the cycle index can be used to indicate which sending cycle is currently. For example, a cycle index of 1 can indicate that the current cycle is the first cycle, or it can indicate that the current cycle is the 0th cycle, or a cycle index of 0 can indicate that the current cycle is the first cycle. The above is only exemplary, and any parameter that indicates the current cycle can be called a cycle index. For example, the cycle index can also be a, b, c, etc. The cycle index can also be called other names, such as a cycle number, etc. When calculating the cycle index, the formula and mapping relationship can be adaptively adjusted according to the actual correspondence between the cycle index and the cycle. In the absence of fundamental contradictions, they should be regarded as the solutions protected by this application.

[0137] Exemplarily, the first time domain resource can be determined with the time domain resource for sending the reference signal in the first period, that is, the second time domain resource, as the starting point. Determining the first time domain offset based on the first frequency domain resource, the second frequency domain resource, the cycle duration, and the cycle index may include: determining a first time domain offset value based on the first frequency domain resource, the second frequency domain resource, the cycle duration, and the cycle index; and determining the first time domain offset based on the first time domain offset value. The first time domain offset value offset1 satisfies the following formula:

[0138] Wherein, f′ is the frequency corresponding to the first frequency domain resource, f is the frequency corresponding to the second frequency domain resource, m is the cycle index, m=0 indicates that the current cycle is the first cycle, and T is the cycle duration.

[0139] Exemplarily, if f is 5 GHz, f' is 5.04 GHz, m is 3, and T is 5 ms, then offset1 is 14.88 ms. Determining the first time domain offset based on the first time domain offset value may involve rounding up, rounding down, or rounding off the duration of a symbol or a time slot based on the duration determined by offset1. Optionally, determining the first time domain resource based on the first frequency domain resource, the second frequency domain resource, the cycle duration, and the cycle index in step 310 includes: determining a third time domain resource; determining a second time domain offset based on the first frequency domain resource and the second frequency domain resource; and determining the first time domain resource based on the second time domain offset and the third time domain resource. The third time domain resource is determined based on the cycle duration, the cycle index, and the second time domain resource, and the second time domain resource may be a time domain resource for transmitting a reference signal within the first cycle. As an example, the second time domain resource may also be determined based on a configuration parameter, which is configured by a device high-level layer or by the network side, such as a starting time domain position for transmitting a reference signal. The second time domain offset represents a time domain offset between the first time domain resource and the third time domain resource.

[0140] The third time domain resource may be a time domain resource determined when a reference signal is sent at equal time intervals (i.e., according to a basic pattern). For example, if the period index is 3, the time corresponding to the time domain position of sending the reference signal in the first period is t and the period duration is T, then the time corresponding to the third time domain resource is t+3T. For another example, the third time domain resource can be directly obtained in the form of a parameter set, for example, {2,5,8,11,14} indicates that the period indexes 0 to 4 correspond to the positions of the time domain resources 2, 5, 8, 11, and 14, respectively. If the period index is 3 at this time, the corresponding third time domain resource is 11. The numerical value in the parameter set here can represent a time slot index or a symbol index, for example, the corresponding third time domain resource is 11, indicating that the corresponding third time domain resource is the 11th time slot, which is not limited in this application. In some embodiments, the third time domain resource can be represented by a symbol or a time slot or other time domain unit or an index of a time domain resource.

[0141] Exemplarily, the second time domain offset is determined based on the first frequency domain resource and the second frequency domain resource. The frequency corresponding to the first frequency domain resource is greater than or equal to the frequency corresponding to the second frequency domain resource, and the second time domain offset is less than or equal to 0, or the frequency corresponding to the first frequency domain resource is less than the frequency corresponding to the second frequency domain resource, and the second time domain offset is greater than 0.

[0142] Exemplarily, determining the second time domain offset according to the first frequency domain resource and the second frequency domain resource may be determining the second time domain offset value according to the first frequency domain resource, the second frequency domain resource, the cycle duration, and the cycle index; and determining the second time domain offset according to the second time domain offset value;

[0143] The second time domain offset value offset2 satisfies the following formula:

[0144] Wherein, f′ is the frequency corresponding to the first frequency domain resource, f is the frequency corresponding to the second frequency domain resource, m is the cycle index, m=0 indicates that the current cycle is the first cycle, and T is the cycle duration.

[0145] In some examples, determining the first time domain offset value or the second time domain offset value based on the first frequency domain resource, the second frequency domain resource, the cycle duration, and the cycle index may be determined based on a mapping relationship between them. For example, the mapping relationship may be determined in the form of a table or a formula. The table or formula may be stored in the transmitting device or the receiving device, and the table or formula may be obtained when the time domain offset value needs to be calculated.

[0146] It should be understood that the above examples are merely illustrative and should not constitute an undue limitation on the present application. In certain embodiments, the unit of the cycle duration may be, for example, other time units such as μs, and the cycle duration may also be represented by symbols, time slots, or other time domain units or the number of time domain resources. Similarly, the time domain offset may also be represented by symbols, time slots, or other time domain units or the number of time domain resources. Any parameter that can achieve the function of the parameter in the formula should be considered within the scope of protection claimed in this application.

[0147] It should also be understood that in the embodiments of the present application, the frequency corresponding to the first frequency domain resource / the frequency corresponding to the second frequency domain resource / the frequency corresponding to the candidate frequency domain resource may refer to the highest frequency, lowest frequency, center frequency or frequency of other agreed positions of the frequency domain resource, or may be the average value of the frequency. The present application does not limit this. As long as the standards for the corresponding frequencies of all frequency domain resources are unified, accurate correspondence in the embodiments of the present application can be achieved.

[0148] Determining the first frequency domain resource from multiple candidate frequency domain resources may be selecting the first frequency domain resource from multiple candidate frequency domain resources based on service priority, or may be selecting the first frequency domain resource from multiple candidate frequency domain resources based on whether there may be a resource collision.

[0149] Although there are multiple candidate frequency domain resources for sending reference signals in each period, it is not necessarily necessary to send reference signals on all candidate frequency domain resources in each period. As a possible embodiment, after successfully sending the reference signal on the first frequency domain resource of multiple candidate frequency domain resources in the current period, stop sending the reference signal on other frequency domain resources of the multiple candidate frequency domain resources. After determining that the reference signal can be successfully sent, stopping sending the reference signal on other resources can save resources and save power consumption. Accordingly, after the receiving end device successfully receives the reference signal on the first frequency domain resource of multiple candidate frequency domain resources in the current period, it can stop receiving the reference signal on other frequency domain resources of the multiple candidate frequency domain resources. After determining that the reference signal can be successfully received, stopping receiving the reference signal on other frequency domain resources can save resources and save power consumption.

[0150] For unlicensed spectrum, LBT can be performed before transmission, and channel access can be performed after LBT is passed.

[0151] As a possible embodiment, after LBT passes for the first frequency domain resource among multiple candidate frequency domain resources in the current cycle, LBT for the remaining frequency domain resources among the multiple candidate frequency domain resources is stopped. After determining that the reference signal can be successfully transmitted, stopping LBT for the remaining resources can save resources and power consumption. When there are multiple first frequency domain resources, the receiving device can select and process reference signals with a higher signal-to-noise ratio, or perform joint processing, which is conducive to ensuring the quality of the perception results.

[0152] As another possible embodiment, after LBT is successful for several of the multiple candidate resources in the current cycle, LBT can continue for several other candidate frequency domain resources. After a certain number of resources are met, LBT for the other candidate frequency domain resources is stopped, and a frequency domain resource with relatively low interference is selected to send a reference signal on the candidate frequency domain resources for which LBT was successful. When LBT is successful for multiple candidate frequency domain resources, the transmitting device can ensure the transmission quality of the reference signal.

[0153] As a possible implementation scheme, a plurality of corresponding candidate time domain resources can be first determined based on a plurality of candidate frequency domain resources, LBT can be performed on the plurality of candidate time-frequency resources, and the first frequency domain resource and the first time domain resource can be determined based on the result of LBT. For example, the frequency domain resource of the time-frequency resource passed by LBT is determined as the first frequency domain resource. Exemplarily, LBT can be performed at a time domain resource that is several symbols ahead of each candidate time-frequency resource. The above examples are merely exemplary, and the specific method of performing LBT is not limited. As long as the regulations and / or protocol provisions are met, they are deemed to be within the scope of the embodiments of this application.

[0154] In an embodiment of the present application, candidate time-frequency resources may also be referred to as candidate resources, and candidate time-frequency resources may refer to a combination of each candidate frequency domain resource in multiple candidate frequency domain resources and its corresponding time domain resource.

[0155] A difference between frequencies corresponding to any two candidate frequency domain resources among the multiple candidate frequency domain resources may be greater than a first threshold.

[0156] It should be understood that the difference in the corresponding frequencies of two adjacent candidate frequency domain resources being greater than the first threshold can improve the transmission success rate. Specifically, for example, in an unlicensed spectrum, the transmitting end device typically performs channel monitoring at the granularity of one LBT channel. The two adjacent candidate frequency domain resources are close to each other, which means that the two candidate frequency domain resources may be located in the same LBT channel. If LBT fails on the LBT channel, the reference signal cannot be sent on either candidate frequency domain resource.

[0157] Optionally, the multiple candidate frequency domain resources may include a second frequency domain resource.

[0158] The second frequency domain resources may also be called basic frequency domain resources or reference frequency domain resources, which is not limited in this application.

[0159] Optionally, the multiple candidate frequency domain resources may not include the second frequency domain resource. For example, the multiple candidate frequency domain resources are candidates when the second frequency domain resource fails to be sent or may fail. For example, it is known in advance that other high-priority services exist on the second frequency domain resource in a subsequent period, or the LBT senses that the second frequency domain resource is occupied, or the second frequency domain resource in a subsequent period is reserved by other devices. In this case, the multiple candidate frequency domain resources may not include the second frequency domain resource.

[0160] Optionally, the first frequency domain resources and the second frequency domain resources in each period may be different, and the first frequency domain resources may include the second frequency domain resources, or may be the second frequency domain resources, or may not include the second frequency domain resources.

[0161] According to the above embodiment, the second time domain offset value can be obtained That is, based on the frequency f′ corresponding to the first frequency domain resource, the frequency f corresponding to the second frequency domain resource, the period index m and the period length T, the second time domain offset value offset2 can be determined. Sometimes the second time domain offset value offset2 cannot correspond exactly to the time domain resource after calculation. The time domain offset corresponding to the adjacent time domain resource can be taken. For example, the calculated result can be rounded, such as rounding up or rounding down.

[0162] In the embodiments of the present application, accurate time domain compensation is performed on the measurement errors caused by sending reference signals on different frequency domain resources through parameter calculation, thereby enabling accurate perception on different frequency domain resources and ensuring that sending reference signals on different frequency domain resources in each period can achieve the same effect as sending reference signals at equal time intervals on the same frequency domain resources.

[0163] As can be seen from the above embodiment, the larger the cycle index, the larger the second time domain offset value. To ensure accuracy, the second time domain offset value within each cycle can be constrained, that is, the second time domain offset for sending the reference signal is less than the second threshold, so that the time domain offset is not too large. As an example, the second time domain offset is less than the cycle duration, so that the time domain resource for sending the reference signal in the current cycle is at least not ahead of the time domain resource for sending the reference signal in the previous cycle.

[0164] The second threshold may also be other values, such as 60 OFDM symbols, 5 time slots, etc. Selecting these thresholds may also improve the uniformity of sampling, thereby improving the reliability of the perception result.

[0165] The following describes a scenario of sending a reference signal with a large bandwidth for sensing with reference to FIG6 .

[0166] The signal transmission method shown in Figure 6 may require transmitting signals occupying large bandwidths when simultaneously sensing multiple targets. However, in unlicensed spectrum, LBT can be performed with smaller bandwidth granularity. For example, the reference signal bandwidth is 100 MHz, the LBT bandwidth is 20 MHz, and one reference signal occupies five LBT channels: CH0, CH1, CH2, CH3, and CH4. If all LBT channels must be idle before transmitting a large-bandwidth signal, the probability of transmitting the reference signal is significantly reduced. To this end, each cycle can be configured to suppress reference signals only on channels where LBT failed, while still transmitting reference signals on other channels where LBT succeeded. For example, in the second and fifth cycles of Figure 6, to replace the reference signals not transmitted on channels where LBT failed, reference signals can be transmitted on the corresponding candidate resources. At other times, reference signals can be transmitted on other LBT channels. This means that within each cycle, the reference signal for each LBT channel corresponds to multiple candidate resource locations, significantly increasing the probability of reference signal transmission.

[0167] Optionally, the network device configures parameters and notifies the transmitting end device, so that the transmitting end device can determine the first frequency domain resource and the first time domain resource according to the configured parameters. In this scenario, optionally, as shown in FIG3 , in scenario 1, method 300 may further include step 3011 .

[0168] 3011. The network device sends first indication information to the sending device.

[0169] Correspondingly, the sending end device receives the first indication information.

[0170] The transmitting end device receives the first indication information and determines a first frequency domain resource and a first time domain resource for sending a reference signal according to the first indication information.

[0171] Sometimes, the transmitting end device has autonomy and can independently determine parameters and select the first frequency domain resource and the first time domain resource. Some terminal devices can also configure resources for other devices through the first indication information. In this case, the device sending the first indication information does not necessarily need to be a network device but can also be a terminal device.

[0172] When the transmitting end device is a network device, the transmitting end device can independently determine parameters and select the first frequency domain resource and the first time domain resource even if it does not receive the first indication message.

[0173] As a possible embodiment, the network device may indicate one or more of a plurality of candidate frequency domain resources, cycle durations, and second frequency domain resources by sending first indication information. The transmitting end device determines the first frequency domain resource and the first time domain resource based on one or more of the plurality of candidate frequency domain resources, cycle durations, and second frequency domain resources indicated by the first indication information.

[0174] As an example, the network device may indicate multiple candidate frequency domain resources through the first indication information, and the transmitting end device may determine the first frequency domain resource and the first time domain resource by itself.

[0175] As another example, the network device may indicate the cycle length through the first indication information, and the transmitting device may select the second frequency domain resource from multiple candidate frequency domain resources and determine the first frequency domain resource and the first time domain resource by itself.

[0176] The network device can also indicate multiple candidate frequency domain resources, cycle lengths and second frequency domain resources through the first indication information. The sending end device can accurately determine the first frequency domain resource and the first time domain resource based on the multiple candidate frequency domain resources, cycle lengths and second frequency domain resources and the cycle index determined by itself when sending the reference signal.

[0177] The above examples are merely exemplary, and are used to illustrate that the first indication information is used to indicate that one or more of multiple candidate frequency domain resources, cycle durations, and second frequency domain resources can realize the process of the transmitting device determining the first frequency domain resource and the first time domain resource. The various combinations included in the first indication information are all within the scope of protection of this application.

[0178] Since the transmitting device has multiple candidate time-frequency resources for transmitting reference signals in each cycle, the receiving device needs to know the locations of these candidate time-frequency resources to facilitate receiving reference signals. In scenario 1, method 300 may optionally further include step 3012.

[0179] 3012. The network device sends first indication information to the receiving device.

[0180] Correspondingly, the receiving device receives the first indication information.

[0181] The receiving end device receives the first indication information and determines a first frequency domain resource and a first time domain resource for receiving a reference signal according to the first indication information.

[0182] In some embodiments, when the receiving device is a network device, the receiving device can independently determine the parameters and the first frequency domain resources and the first time domain resources even if it does not receive the first indication message.

[0183] In some embodiments, when the transmitting device and the receiving device are the same device, the first indication information may not be sent to the receiving device.

[0184] Sometimes, the multiple candidate frequency domain resources for receiving a reference signal by a receiving device are defined by the protocol, and the receiving device can autonomously determine the first frequency domain resource and the first time domain resource. Some terminal devices can also configure resources for other devices using the first indication information. In this case, the device sending the first indication information does not necessarily need to be a network device; it can also be a terminal device.

[0185] The description of how the receiving device determines the first frequency domain resource and the first time domain resource according to the first indication information can refer to how the transmitting device determines the first frequency domain resource and the first time domain resource according to the first indication information, and no further details are given here.

[0186] Optionally, the transmitting device may also configure parameters and notify the receiving device, so that the receiving device can determine the first frequency domain resource and the first time domain resource based on the configured parameters. In this scenario, optionally, as shown in FIG3 , in scenario 2, method 300 may further include step 3021.

[0187] 3021. The sending device sends first indication information.

[0188] Correspondingly, the receiving device receives the first indication information.

[0189] The transmitting device may determine the configuration parameters based on the first indication information sent by the network device and send the first indication information to the receiving device, or may determine the configuration parameters on its own and send the first indication information to the receiving device.

[0190] The step of the transmitting end device sending the first indication information can refer to step 3012 and will not be described in detail here. Optionally, scenario 1 and scenario 2 can also be combined. For example, the network device sends the first indication information to the transmitting end device, and after the transmitting end device receives the first indication information, it sends the first indication information to the receiving end device.

[0191] In addition, for SL scenarios, both the transmitting device and the receiving device are terminal devices, and the reference signal is usually sent together with the SCI carried by the PSCCH. The SCI is used to indicate the transmission resources, transmission mode, etc. of the reference signal. Among them, the SCI includes a resource reservation field. For periodic signals, in addition to indicating the transmission resources of the current period, the SCI can also indicate the transmission resources of the next period through the resource reservation field, thereby realizing periodic resource reservation. In the SL scenario, the UE can adopt an autonomously selected resource allocation method (mode 2), listen to the resource reservation information sent by other UEs and measure the corresponding receiving power before sending the signal, and select resources that are not reserved by other UEs or are reserved by other UEs but have lower receiving power, so as to avoid interference between UEs due to occupying the same transmission resources in advance.

[0192] In order to reserve resources for sending a reference signal, the transmitting device may further send second indication information.

[0193] The second indication information is used to reserve time domain resources and frequency domain resources for sending reference signals in subsequent periods.

[0194] Correspondingly, the receiving device and other terminal devices receive the second indication information.

[0195] The receiving device may determine, based on the received second indication information, the time domain resources and frequency domain resources for which the transmitting device may send a reference signal in a subsequent period, to facilitate subsequent reception of the reference signal.

[0196] Other terminal devices can determine the time domain resources and frequency domain resources reserved by the transmitting device for sending reference signals in subsequent periods based on the received second indication information, facilitating resource selection. It is understandable that in the SL scenario, the SCI will indicate the period length, and other terminal devices can obtain the parameters of the reference signal sent by the transmitting device by receiving the SCI sent by the transmitting device.

[0197] In some embodiments, the second indication information may be included in the SCI.

[0198] However, the reserved field under the existing mechanism may cause inaccurate identification of the resources for sending the reference signal in the signal transmission method provided by the above embodiment.

[0199] As shown in Figure 7, the first UE originally chooses to send a reference signal on the second frequency domain resource CH2 with a period of duration T. However, a reference signal is sent on the first frequency domain resource CH3 at time t'1 during a certain period. This is actually equivalent to sending a reference signal on the second frequency domain resource CH2 at time t'1. If other UEs listen within the time window including time t'1 at this time, they can detect the SCI sent by the first UE at time t'1 along with the reference signal on the first frequency domain resource CH3. According to the traditional mechanism, the time domain position corresponding to the resource reserved for the next period by the SCI sent on the first frequency domain resource CH3 at time t'1 is t'1+T, and the frequency domain resource is the first frequency domain resource CH3. However, the desired reserved resource is the second frequency domain resource CH2 at time t1+T. That is, the desired reserved time domain resource should be obtained based on t1 and T, not t'1 and T. In particular, time t1 or t'1 can be understood as the starting time for sending the SCI and reference signal, and can actually occupy multiple symbols for transmission.

[0200] According to the above embodiment, it can be obtained that Therefore, in addition to indicating the resource reservation cycle duration T, the SCI also needs to indicate the second frequency domain resource and the cycle index m. This information can be indicated in the same field as the cycle duration or in a different field.

[0201] When other UEs are listening, they can identify the reserved resources by the following steps: first, based on the time t'1 of receiving the SCI, the frequency of the received SCI or the frequency f' corresponding to the first frequency domain resource that actually sends the reference signal, the resource reservation period or period duration T indicated by the SCI, the period index m, the frequency corresponding to the second frequency domain resource or the basic frequency f, the Then, the reserved time domain resources for the next period are determined according to t1 and T, that is, the time corresponding to the time domain resources for the next period is t1+T, and the reserved frequency domain resources for the next period are the second frequency domain resources.

[0202] It should be understood that the frequency domain resources corresponding to the next periodic reference signal can be understood as merely a carrier frequency offset compared to the frequency domain resources corresponding to the current periodic reference signal, and other frequency domain configuration parameters such as the comb structure and occupied bandwidth remain unchanged. Similarly, the frequency domain resources and time domain resources reserved for the first UE in the next few periods can also be determined according to the above process.

[0203] As shown in Figure 8, the resource reservation method can increase channel access opportunities, for example, in unlicensed spectrum, and can also allow the SCI to reserve multiple resources in the next cycle, such as when the priority of the sensing service is relatively high. In this case, the SCI can also indicate multiple frequency domain resources from multiple candidate frequency domain resources.

[0204] As an embodiment, each candidate frequency domain resource may be indicated by an offset from the basic frequency domain resource. The above step of identifying the reserved resource may be supplemented with calculating the time domain resources {t1+T+ΔT n} steps, where ΔT n It is the time domain offset corresponding to multiple frequency domain resources, thereby completing the reservation of multiple time domain resources and frequency domain resources in the subsequent sending cycle.

[0205] According to the understanding of the above embodiment, a resource reservation method is provided, where a first UE sends second indication information, where the second indication information is used to reserve at least one frequency domain resource among a plurality of candidate frequency domain resources for a subsequent transmission period.

[0206] Accordingly, the second UE may receive the second indication information and determine, based on the second indication information, at least one frequency domain resource and corresponding time domain resource reserved by the first UE for a subsequent transmission period. To achieve this purpose, the second indication information may indicate at least one frequency domain resource among multiple candidate frequency domain resources, a second frequency domain resource, or one or more of a period index.

[0207] As a possible implementation scheme, the second indication information is used to indicate at least one frequency domain resource among multiple candidate frequency domain resources, a second frequency domain resource, and one or more of the period index. Exemplarily, the second indication information only indicates the second frequency domain resource, and the second indication information may be sent together with the reference signal. Other devices can also determine the time domain resource and frequency domain resource for sending the reference signal in this period based on the time domain resource and frequency domain resource received from the second indication information, that is, to determine the first time domain resource and the first frequency domain resource, and then determine the resource used by the transmitting end device to send the reference signal in the subsequent period based on the first frequency domain resource, the second frequency domain resource, the first time domain resource, and the period length, wherein the frequency domain resource of the resource used by the transmitting end device to send the reference signal in the subsequent period is the first frequency domain resource and / or the second frequency domain resource.

[0208] Exemplarily, the second indication information only indicates the period index and the second frequency domain resources. Since in the SL scenario, the second indication information can be sent together with the reference signal, other devices can determine the time domain resources and frequency domain resources for the transmitting device to send the reference signal in the current period based on the time domain resources and frequency domain resources received from the second indication information, that is, to determine the first time domain resources and the first frequency domain resources, and then can determine the resources used by the transmitting device to send the reference signal in subsequent periods based on the first frequency domain resources, the second frequency domain resources, the first time domain resources, the period index, and the period duration, wherein the frequency domain resources of the resources used by the transmitting device to send the reference signal in subsequent periods are the first frequency domain resources and / or the second frequency domain resources.

[0209] Exemplarily, the second indication information indicates at least one frequency domain resource among multiple candidate frequency domain resources, a second frequency domain resource, and a period index. Since in the SL scenario, the second indication information can be sent together with the reference signal, other devices can determine the time domain resources and frequency domain resources for the transmitting device to send the reference signal in the current period based on the time domain resources and frequency domain resources received from the second indication information, that is, to determine the first time domain resource and the first frequency domain resource, and then can determine the resource used by the transmitting device to send the reference signal in the subsequent period based on at least one frequency domain resource among multiple candidate frequency domain resources, the first frequency domain resource, the second frequency domain resource, the first time domain resource, the period index, and the period length, wherein the frequency domain resource of the resource used by the transmitting device to send the reference signal in the subsequent period is at least one frequency domain resource and / or the first frequency domain resource and / or the second frequency domain resource among multiple candidate frequency domain resources.

[0210] The above examples are merely exemplary, and are used to illustrate that at least one frequency domain resource among multiple candidate frequency domain resources in the second indication information, the second frequency domain resource, and one or more of the period indexes can realize the process of reserving frequency domain resources and time domain resources for subsequent transmission of reference signals. The various combinations included in the second indication information are all within the scope of protection of this application.

[0211] FIG9 is a schematic diagram of a communication device provided in an embodiment of the present application.

[0212] As shown in Figure 9, the communication device 900 may include a transceiver unit 910 and a processing unit 920. The transceiver unit 910 may be used to implement corresponding communication functions. The transceiver unit 910 may also be referred to as a communication interface or a communication unit. The processing unit 920 may be used to determine resources. Optionally, the transceiver unit 910 may include a receiving unit and a sending unit. The receiving unit is used to implement the receiving function, and the sending unit is used to implement the sending function.

[0213] Optionally, the communication device 900 may further include a storage unit, which may be used to store instructions and / or data. The processing unit 920 may read the instructions and / or data in the storage unit so that the device implements the aforementioned method embodiment.

[0214] As a design, the communication device 900 is used to execute the steps or processes executed by the device in the above method embodiment, the transceiver unit 910 is used to execute the transceiver-related operations in the above method embodiment, and the processing unit 920 is used to execute the resource-related operations determined in the above method embodiment.

[0215] It should be understood that the specific process of each unit executing the above corresponding steps has been described in detail in the above method embodiment, and for the sake of brevity, it will not be repeated here.

[0216] It should also be understood that the communication device 900 here is embodied in the form of a functional unit. The term "unit" here can refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a dedicated processor or a group processor, etc.) and a memory for executing one or more software or firmware programs, a combined logic circuit and / or other suitable components that support the described functions. In an optional example, those skilled in the art will understand that the communication device 900 can be specifically a device in the above-mentioned embodiment (such as a terminal device, or a network device), which can be used to execute the various processes and / or steps corresponding to the device in the above-mentioned method embodiments. To avoid repetition, they will not be described here.

[0217] The communication device 900 of each of the above-mentioned solutions has the function of implementing the corresponding steps performed by the device (such as a terminal device, or a network device, etc.) in the above-mentioned method. The function can be implemented by hardware, or the corresponding software can be implemented by hardware. The hardware or software includes one or more modules corresponding to the above-mentioned functions; for example, the transceiver unit can be replaced by a transceiver (for example, the sending unit in the transceiver unit can be replaced by a transmitter, and the receiving unit in the transceiver unit can be replaced by a receiver), and other units, such as the determination unit, can be replaced by a processor to respectively perform the transceiver operations and related determination operations in each method embodiment.

[0218] In addition, the transceiver unit 910 may also be a transceiver circuit (for example, may include a receiving circuit and a sending circuit), and the determination unit may be a processing circuit.

[0219] It should be noted that the communication device 900 in FIG9 can be a device in the aforementioned embodiment, or it can be a chip or chip system, such as a system on a chip (SoC). The transceiver unit can be an input / output circuit or a communication interface, and the determination unit can be a processor, microprocessor, or integrated circuit integrated on the chip. This is not limited here.

[0220] FIG10 is a schematic diagram of a communication device provided in an embodiment of the present application.

[0221] As shown in the apparatus 1000 of FIG. 10 , the communication apparatus 1000 may include a processor 1010 .

[0222] Optionally, as shown in FIG10 , the apparatus 1000 further includes a transceiver 1020, which is configured to receive and / or transmit signals. For example, the processor 1010 is configured to control the transceiver 1020 to receive and / or transmit signals. Optionally, the transceiver 1020 may include a receiver and a transmitter, wherein the receiver is configured to receive signals and the transmitter is configured to transmit signals.

[0223] The processor 1010 can be coupled to the memory 1030, which is used to store computer programs or instructions and / or data. The processor 1010 is used to execute the computer programs or instructions stored in the memory 1030, or read the data stored in the memory 1030 to execute the methods in the above method embodiments.

[0224] Optionally, there are one or more processors 1010 .

[0225] Optionally, there are one or more memories 1030 .

[0226] Optionally, the memory 1030 is integrated with the processor 1010 or provided separately.

[0227] As an example, the processor 1010 may have the function of the processing unit 920 shown in FIG. 9 , the memory 1030 may have the function of a storage unit, and the transceiver 1020 may have the function of the transceiver unit 910 shown in FIG. 9 .

[0228] As a solution, the apparatus 1000 is used to implement the operations performed by a device (such as a terminal device, or a network device, etc.) in the above various method embodiments.

[0229] For example, the processor 1010 is configured to execute computer programs or instructions stored in the memory 1030 to implement relevant operations of devices (such as terminal devices, network devices, etc.) in the above various method embodiments.

[0230] It should be understood that the processor mentioned in the embodiments of the present application may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc.

[0231] It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory and / or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM). For example, RAM can be used as an external cache. By way of example and not limitation, RAM includes the following forms: static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM).

[0232] It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, the memory (storage module) can be integrated into the processor.

[0233] The apparatus in FIG10 may be a device in the aforementioned embodiment, or may be a chip or chip system, such as a system on chip (SoC). The transceiver may be an input / output circuit or a communication interface; the processor may be a processor, microprocessor, or integrated circuit integrated on the chip. This is not limited here.

[0234] It should also be noted that the memory described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0235] When the device is a chip system (or may also be called a processing system), it may include a logic circuit and an input / output interface.

[0236] The logic circuit may be a processing circuit in a chip system. The logic circuit may be coupled to a storage unit and call instructions in the storage unit so that the chip system can implement the methods and functions of each embodiment of the present application. The input / output interface may be an input / output circuit in a chip system that outputs information processed by the chip system or inputs data or signaling information to be processed into the chip system for processing.

[0237] An embodiment of the present application further provides a computer-readable storage medium on which are stored computer program instructions for implementing the methods executed by a device (such as a sending end device or a receiving end device) in the above-mentioned method embodiments.

[0238] For example, when the computer program instructions are executed by a computer, the computer can implement the methods executed by a device (such as a terminal device or a network device) in each embodiment of the above method.

[0239] An embodiment of the present application further provides a computer program product comprising program instructions, which, when executed by a computer, implement the methods executed by a device (such as a terminal device or a network device) in the above-mentioned method embodiments.

[0240] An embodiment of the present application also provides a communication system, which includes the terminal device (eg, the first terminal device and / or the second terminal device) and / or the network device in the above embodiments.

[0241] The explanation of the relevant contents and beneficial effects of any of the above-mentioned devices can be referred to the corresponding method embodiments provided above, which will not be repeated here.

[0242] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0243] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0244] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0245] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0246] In addition, each functional unit in each embodiment of the present application may be integrated into a specific unit, each unit may exist physically separately, or two or more units may be integrated into one unit.

[0247] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the field, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0248] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A signal transmission method, characterized in that, The method includes: Determining a first time-domain resource according to a first frequency-domain resource, a second frequency-domain resource, a period duration, and a period index, where the first frequency-domain resource is selected from a plurality of candidate frequency-domain resources, and the second frequency-domain resource is the frequency-domain resource for transmitting the reference signal in the first period or the frequency-domain resource determined according to configuration parameters; Transmitting the reference signal on the first frequency-domain resource and the first time-domain resource.

2. The method according to claim 1, wherein The determining the first time-domain resource according to the first frequency-domain resource, the second frequency-domain resource, the period duration, and the period index includes: Determining a first time-domain offset according to the first frequency-domain resource, the second frequency-domain resource, the period duration, and the period index, where the first time-domain offset represents the time-domain offset between the first time-domain resource and a second time-domain resource, and the second time-domain resource is the time-domain resource for transmitting the reference signal in the first period; Determining the first time-domain resource according to the first time-domain offset and the second time-domain resource.

3. The method according to claim 2, wherein The determining the first time-domain offset according to the first frequency-domain resource, the second frequency-domain resource, the period duration, and the period index includes: Determining a first time-domain offset value according to the first frequency-domain resource, the second frequency-domain resource, the period duration, and the period index; Determining the first time-domain offset according to the first time-domain offset value; Among them, the first time-domain offset value offset1 satisfies the following formula: where f′ is the frequency corresponding to the first frequency-domain resource, f is the frequency corresponding to the second frequency-domain resource, m is the period index, and T is the period duration.

4. The method according to claim 1, wherein The determining the first time-domain resource according to the first frequency-domain resource, the second frequency-domain resource, the period duration, and the period index includes: Determining a third time-domain resource, where the third time-domain resource is determined according to the period duration, the period index, and the second time-domain resource, and the second time-domain resource is the time-domain resource for transmitting the reference signal in the first period; Determining a second time-domain offset according to the first frequency-domain resource and the second frequency-domain resource, where the second time-domain offset represents the time-domain offset between the first time-domain resource and the third time-domain resource; Determining the first time-domain resource according to the second time-domain offset and the third time-domain resource.

5. The method according to claim 4, characterized in that, The determining the second time-domain offset according to the first frequency-domain resource and the second frequency-domain resource includes: The frequency corresponding to the first frequency-domain resource is greater than or equal to the frequency corresponding to the second frequency-domain resource, and the second time-domain offset is less than or equal to 0, or The frequency corresponding to the first frequency-domain resource is less than the frequency corresponding to the second frequency-domain resource, and the second time-domain offset is greater than 0.

6. The method according to claim 4 or 5, characterized in that, The determining the second time-domain offset according to the first frequency-domain resource and the second frequency-domain resource includes: Determining a second time-domain offset value according to the first frequency-domain resource, the second frequency-domain resource, the period duration, and the period index; Determining the second time-domain offset according to the second time-domain offset value; Among them, the second time domain offset value offset2 satisfies the following formula: where f′ is the frequency corresponding to the first frequency-domain resource, f is the frequency corresponding to the second frequency-domain resource, m is the period index, and T is the period duration.

7. The method according to claim 5 or 6, characterized in that, The second time-domain offset is less than the period duration.

8. The method according to any one of claims 1 to 7, characterized in that, The method further includes: Receive first indication information, where the first indication information is used to indicate one or more of the multiple candidate frequency-domain resources, the period duration, and the second frequency-domain resource.

9. The method according to any one of claims 1 to 8, characterized in that, The method further includes: Transmit second indication information, where the second indication information is used to indicate one or more of at least one frequency-domain resource in the multiple candidate frequency-domain resources, the second frequency-domain resource, and the period index.

10. The method according to any one of claims 1 to 9, characterized in that, The method further includes: Perform listen-before-talk (LBT); Determine the first frequency-domain resource from the multiple candidate frequency-domain resources according to the result of the LBT.

11. The method according to any one of claims 1 to 10, characterized in that, The first frequency-domain resource is different from the second frequency-domain resource.

12. The method according to any one of claims 1 to 11, characterized in that, The difference between the frequencies corresponding to any two candidate frequency-domain resources in the multiple candidate frequency-domain resources is greater than a first threshold.

13. A signal transmission method, characterized in that, The method includes: Determine a first time-domain resource according to the first frequency-domain resource, the second frequency-domain resource, the period duration, and the period index, where the first frequency-domain resource is selected from the multiple candidate frequency-domain resources, and the second frequency-domain resource is the frequency-domain resource for receiving the reference signal in the first period, or the frequency-domain resource determined according to configuration parameters; Receive the reference signal on the first frequency-domain resource and the first time-domain resource.

14. The method according to claim 13, wherein The determining the first time-domain resource according to the first frequency-domain resource, the second frequency-domain resource, the period duration, and the period index includes: Determine a first time-domain offset according to the first frequency-domain resource, the second frequency-domain resource, the period duration, and the period index, where the first time-domain offset represents the time-domain offset between the first time-domain resource and the second time-domain resource, and the second time-domain resource is the time-domain resource for receiving the reference signal in the first period; Determine the first time-domain resource according to the first time-domain offset and the second time-domain resource.

15. The method according to claim 14, wherein The determining the first time-domain offset according to the first frequency-domain resource, the second frequency-domain resource, the period duration, and the period index includes: Determine a first time-domain offset value according to the first frequency-domain resource, the second frequency-domain resource, the period duration, and the period index; Determine the first time-domain offset according to the first time-domain offset value; Among them, the first time domain offset value offset1 satisfies the following formula: where f′ is the frequency corresponding to the first frequency-domain resource, f is the frequency corresponding to the second frequency-domain resource, m is the period index, and T is the period duration.

16. The method according to claim 13, characterized in that, The determining the first time-domain resource according to the first frequency-domain resource, the second frequency-domain resource, the period duration, and the period index includes: Determine a third time-domain resource, where the third time-domain resource is determined according to the period duration, the period index, and the second time-domain resource, and the second time-domain resource is the time-domain resource for receiving the reference signal in the first period; Determine a second time-domain offset according to the first frequency-domain resource and the second frequency-domain resource, where the second time-domain offset represents the time-domain offset between the first time-domain resource and the third time-domain resource; Determine the first time-domain resource according to the second time-domain offset and the third time-domain resource.

17. The method according to claim 16, characterized in that, The determining the second time-domain offset according to the first frequency-domain resource and the second frequency-domain resource includes: The frequency corresponding to the first frequency-domain resource is greater than or equal to the frequency corresponding to the second frequency-domain resource, and the second time-domain offset is less than or equal to 0, or The frequency corresponding to the first frequency-domain resource is less than the frequency corresponding to the second frequency-domain resource, and the second time-domain offset is greater than 0.

18. The method according to claim 16 or 17, characterized in that, The determining the second time-domain offset according to the first frequency-domain resource and the second frequency-domain resource includes: determining a second time-domain offset value according to the first frequency-domain resource, the second frequency-domain resource, the period duration, and the period index; determining the second time-domain offset according to the second time-domain offset value; Among them, the second time domain offset value offset2 satisfies the following formula: where f′ is the frequency corresponding to the first frequency-domain resource, f is the frequency corresponding to the second frequency-domain resource, m is the period index, and T is the period duration.

19. The method according to any one of claims 16 to 18, characterized in that The second time-domain offset is less than the period duration.

20. The method according to any one of claims 13 to 19, characterized in that The method further includes: receiving first indication information for indicating one or more of the plurality of candidate frequency-domain resources, the period duration, and the second frequency-domain resource.

21. The method according to any one of claims 13 to 19, characterized in that The method further includes: receiving second indication information for indicating one or more of at least one frequency-domain resource in the plurality of candidate frequency-domain resources, the second frequency-domain resource, and the period index.

22. The method according to any one of claims 13 to 21, characterized in that, The first frequency-domain resource is different from the second frequency-domain resource.

23. The method according to any one of claims 13 to 22, characterized in that, The difference between the frequencies corresponding to any two candidate frequency-domain resources in the plurality of candidate frequency-domain resources is greater than a first threshold.

24. A communication device, characterized in that, The apparatus includes: a processor; The processor is configured to execute the method according to any one of claims 1 to 12, or the method according to any one of claims 13 to 23.

25. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores program instructions for being read by a processor to execute the method according to any one of claims 1 to 12, or the method according to any one of claims 13 to 23.

26. A computer program product, characterized in that, When the computer program product runs on a computer, the computer is caused to execute the method according to any one of claims 1 to 12, or the method according to any one of claims 13 to 23.

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