Communication method and communication apparatus

Abstract

A communication method and a communication apparatus. The method comprises: a terminal receives configuration information of a first reference signal, the configuration information being used for indicating a first frequency domain resource corresponding to the first reference signal. The first frequency domain resource and a second frequency domain resource correspond to the same time domain resource, and data and reference signals are not mapped onto the second frequency domain resource. Furthermore, the terminal measures the first reference signal on the basis of the configuration information. By means of the communication method, the terminal can measure the reference signal repeated in the frequency domain to obtain Doppler information, so that the measurement time for obtaining the Doppler information can be shortened, thereby reducing the impact on data communication.

Description

A communication method and communication device

[0001] This application claims priority to Chinese Patent Application No. 202410551684.8, filed on May 6, 2024, entitled "A Communication Method and Communication Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communication technology, and in particular to a communication method and communication device. Background Technology

[0003] The difference between the frequency of the received signal and the frequency of the transmitted signal is usually called the Doppler frequency shift. Doppler measurement results (including Doppler frequency shift) are widely used in various scenarios, such as communication scenarios where Doppler frequency shift compensation is performed based on Doppler measurement results, and scenarios where positioning is performed based on Doppler measurement results.

[0004] Based on multiple reference signals repeatedly transmitted in the time domain, the terminal can obtain Doppler measurement results (hereinafter referred to as Doppler information). In some scenarios, the aforementioned multiple reference signals may occupy a long time in the time domain (e.g., multiple time slots). In addition, the reference signal and data used for Doppler measurement may be time-division multiplexed, that is, data cannot be transmitted when the reference signal used for Doppler measurement is transmitted.

[0005] It is evident that it takes a long time (at least two time slots) for the terminal to obtain a single Doppler estimation, which significantly impacts data communication. Summary of the Invention

[0006] This application provides a communication method and a communication device, which helps to shorten the measurement time for acquiring Doppler information, thereby reducing the impact on data communication.

[0007] Firstly, this application provides a communication method that can be applied to a terminal side, such as a terminal or a communication module within a terminal, or a circuit or chip (such as a modem chip, also known as a baseband chip, or a system-on-chip (SoC) chip or system-in-package (SIP) chip containing a modem core) responsible for communication functions within the terminal. Taking the application of this method to a terminal as an example, the method includes: the terminal sending first indication information, which indicates a first comb size of a first reference signal and / or whether it supports a first capability, the first capability being the ability to obtain measurement results based on a first reference signal corresponding to a single symbol; the terminal receiving configuration information for the first reference signal, which indicates that a first frequency domain resource is the frequency domain resource corresponding to the first reference signal; and the terminal measuring the first reference signal based on the configuration information.

[0008] In the method described in the first aspect, the terminal indicates to the network device, via first indication information, the desired Comb size or the maximum Comb size supported by the terminal, and / or whether to indicate the first capability. It is understood that when the terminal indicates the desired Comb size or the maximum Comb size supported by the terminal via the first indication information, it can be considered that the terminal supports the first capability. This first capability is the ability to obtain measurement results based on a first reference signal corresponding to a single symbol. This first capability can also be described as the ability to obtain measurement results based on frequency domain repetition, or it can be described as the ability to obtain measurement results based on a first reference signal of a single symbol. Specifically, if the bandwidth occupied by the first reference signal is denoted as the first bandwidth, and the first frequency domain resources mapped by the first reference signal can occupy a portion of the first bandwidth, then it can be considered that the first reference signal is sampled / sampled in the frequency domain (first bandwidth). Based on signal theory, sampling in the frequency domain can be equivalent to periodic extension in the time domain. This means the terminal can measure Doppler information by obtaining multiple repeating sub-first reference signals in the time domain. Compared to repeatedly transmitting reference signals in the time domain to obtain Doppler information, this method shortens the measurement time for acquiring Doppler information, thereby reducing the impact on data communication and minimizing errors introduced by terminal clock drift. Furthermore, if the terminal supports the first capability, the network device can configure a first frequency domain resource for mapping the first reference signal based on the first indication information.

[0009] In one possible implementation of the method provided in the first aspect, the terminal sends a first message containing the first indication information. This first message is either a capability message or an on-demand request message, and the on-demand request message is an on-demand request reference signal message. By implementing this possible implementation, when the first indication information is carried in a capability message, the network can store the capability after the terminal reports it once via the capability message, eliminating the need for the terminal to resend the first indication information, thus reducing signaling overhead. When the first indication information is carried in an on-demand request message, the terminal sends its first Comb size (i.e., the desired Comb size or the maximum supported Comb size). The terminal does not need to expose its own capabilities excessively, which improves terminal security; furthermore, it avoids introducing new capability items, simplifying signaling design.

[0010] In one possible implementation of the method provided in the first aspect, the first frequency domain resource and the second frequency domain resource correspond to the same time domain resource, and no data or reference signal is mapped on the second frequency domain resource. By implementing this possible implementation, the frequency domain resource used to map the first reference signal constitutes the first frequency domain resource, and the frequency domain resource not used to map the first reference signal constitutes the second frequency domain resource. The second frequency domain resource is neither used to map data nor to map any reference signal including the first reference signal. It can also be understood that the first reference signal is transmitted on the first frequency domain resource, while the second frequency domain resource is "blank," which helps to reduce interference between multiple repeating sub-first reference signals.

[0011] Secondly, this application provides a communication method that can be applied to a terminal side, such as a terminal or a communication module within a terminal, or a circuit or chip within a terminal responsible for communication functions. Taking the application of this method to a terminal as an example, the method includes: the terminal receiving configuration information of a first reference signal, the configuration information indicating that a first frequency domain resource is the frequency domain resource corresponding to the first reference signal, the first frequency domain resource and the second frequency domain resource correspond to the same time domain resource, and the second frequency domain resource does not map data and the reference signal. The terminal then measures the first reference signal based on the configuration information.

[0012] In the method described in this second aspect, it can be understood that the configuration information provides indication information of the frequency domain resources corresponding to the first reference signal. The frequency domain resources used to map the first reference signal constitute the first frequency domain resources, and the frequency domain resources not used to map the first reference signal constitute the second frequency domain resources. These second frequency domain resources are neither used to map data nor to map any reference signal including the first reference signal; it can also be understood that the first reference signal is transmitted on these first frequency domain resources, while these second frequency domain resources are "blank." For ease of explanation, the total bandwidth of the sum of the first and second frequency domain resources is denoted as the first bandwidth. Considering that the first frequency domain resources can occupy a portion of the first bandwidth, it can be assumed that the first reference signal is sampled / sampled in the frequency domain (first bandwidth). Based on signal theory, sampling in the frequency domain can be equivalent to periodic extension in the time domain. This means the terminal can measure Doppler information by obtaining multiple repeating sub-first reference signals in the time domain. Compared to repeatedly transmitting reference signals in the time domain to obtain Doppler information, this method shortens the measurement time for acquiring Doppler information, thereby reducing the impact on data communication and minimizing errors introduced by terminal clock drift. Furthermore, since the second frequency domain resources are "blank," the interference between the multiple repeating sub-first reference signals is minimal.

[0013] In one possible implementation of the method provided in conjunction with the first or second aspect, the bandwidth occupied by the first reference signal is the sum of the second frequency domain resource and the first frequency domain resource. By implementing this possible implementation, within the bandwidth occupied by the first reference signal, the second frequency domain resource and the first frequency domain resource are complementary to each other, which is beneficial for the terminal to obtain all the information in the bandwidth occupied by the first reference signal. Furthermore, the bandwidth occupied by the first reference signal contains frequency domain resources (i.e., second frequency domain resources) that do not map data and include any reference signal of the first reference signal, which is beneficial to reducing interference between multiple repeating sub-first reference signals.

[0014] In one possible implementation combining the methods provided by the first or second aspect, the time-domain resource corresponding to the first and second frequency-domain resources is a symbol. By implementing this possible implementation, the terminal can measure the first reference signal on a symbol to obtain the measurement result, which helps to shorten the measurement time for acquiring Doppler information and thus helps to reduce the impact on data communication.

[0015] In one possible implementation of the method provided in conjunction with the first or second aspect, the configuration information is further used to indicate one or more of the following: data and reference signals are not mapped on the second frequency domain resource, the second frequency domain resource and the first frequency domain resource correspond to the same time domain resource; the serving network device does not map data and reference signals on the second frequency domain resource; at least one neighboring cell network device does not map data and reference signals on the second frequency domain resource; and the location of the second frequency domain resource.

[0016] In one possible implementation combining the methods provided in the first or second aspect, the first frequency domain resource belongs to different carrier components or frequency bands. By implementing this possible implementation, the terminal can implement the scheme of this application across carriers or frequency bands, or in other words, it can utilize a larger bandwidth (across carriers or frequency bands) to obtain more accurate Doppler information in a shorter time.

[0017] In one possible implementation combining the methods provided in the first or second aspect, the terminal receives a second message including the configuration information. This second message is any one of a broadcast message, a radio resource control (RRC) message, or a long-term evolution positioning protocol (LPP) message. By implementing this possible implementation, the configuration information can be carried within a broadcast message, an RRC message, or an LPP message, which improves the flexibility of the terminal in sending configuration information. It is understood that when the second message is a broadcast message, multiple terminals within the cell (e.g., terminals in RRC connected and RRC disconnected states) can receive the second message, and the message content is applicable to multiple terminals, eliminating the need to send it to individual terminals separately, thus reducing network-side overhead. When the second message is a unicast message (e.g., an RRC message or an LPP message), only RRC connected terminals can receive the second message, and the message content can be applied only to a single terminal, making it more targeted, improving the accuracy of the second message, and reducing terminal-side processing complexity and storage space.

[0018] In one possible implementation combining the methods provided in the first or second aspect, the terminal sends a measurement result based on the first reference signal, which corresponds to a first time unit less than a time slot. By implementing this possible implementation, the reported Doppler measurement information (e.g., at the symbol level) can provide more accurate measurement information. For example, in satellite positioning or satellite communication scenarios, due to the high-speed movement of satellites and rapid Doppler changes, reporting finer-grained Doppler measurement information helps the network obtain more accurate measurement results, more accurately assist communication, or obtain more accurate positioning results.

[0019] In one possible implementation combining the methods provided in the first or second aspect, the terminal transmits information from the first time unit. By implementing this possible implementation, the network side can obtain the time information corresponding to the Doppler measurement information reported by the terminal for subsequent communication or positioning.

[0020] In one possible implementation of the method provided in conjunction with the first or second aspect, the terminal sends a first measurement result, which is the difference between a second measurement result and a reference measurement result. The second measurement result is one or more of at least one measurement result obtained based on the first reference signal, and the reference measurement result is a statistical value of the at least one measurement result. By implementing this possible implementation, the terminal can report the difference between the at least one measurement result and the reference measurement result, which is beneficial for saving signaling overhead compared to directly reporting all measurement results.

[0021] In one possible implementation combining the methods provided in the first or second aspect, the terminal sends the reference measurement result.

[0022] In one possible implementation of the method provided in conjunction with the first or second aspect, the first frequency domain resource comprises M sub-frequency domain resources, which may be continuous or discontinuous in the frequency domain, where M is a positive integer. Optionally, M is the second comb size of the first reference signal.

[0023] In one possible implementation of the method provided in conjunction with the first or second aspect, the second frequency domain resource includes N sub-frequency domain resources, which may be continuous or discontinuous in the frequency domain, where N is a positive integer.

[0024] Optionally, M is equal to N.

[0025] Thirdly, this application provides a communication method that can be applied to a network side, such as a network device or a component (e.g., a circuit, chip, or chip system) within the network device. Taking the application of this method to a network device as an example, the method includes: the network device receiving first indication information, the first indication information indicating a first combo size of a first reference signal and / or whether it supports a first capability, the first capability being the ability to obtain measurement results based on the first reference signal corresponding to a single symbol. Further, the network device sends configuration information for the first reference signal, the configuration information indicating that the first frequency domain resource is the first frequency domain resource corresponding to the first reference signal. The network device then sends the first reference signal.

[0026] For the beneficial effects obtained by the methods described in any of the third aspects, please refer to the description of the beneficial effects of the methods described in the first aspect, which will not be repeated here.

[0027] In one possible implementation of the method provided in conjunction with the third aspect, the network device receives a first message containing the first indication information, the first message being an on-demand request message for a capability message or a reference signal, the on-demand request message being an on-demand request for a reference signal message.

[0028] In one possible implementation of the method combining the third aspect of volume, the first frequency domain resource and the second frequency domain resource correspond to the same time domain resource, on which data and reference signals are not mapped.

[0029] Fourthly, this application provides a communication method that can be applied to a network side, such as a network device or a component (e.g., a circuit, chip, or chip system) within the network device. Taking the application of this method to a network device as an example, the method includes: the network device transmitting configuration information for a first reference signal, wherein the configuration information indicates that a first frequency domain resource is the frequency domain resource corresponding to the first reference signal, the first frequency domain resource and the second frequency domain resource correspond to the same time domain resource, and the second frequency domain resource does not map data and the reference signal. Further, the network device transmits the first reference signal.

[0030] The beneficial effects obtained by the methods described in any of the fourth aspects are illustrated in the description of the beneficial effects of the methods described in the second aspect, which will not be repeated here. In one possible implementation combining the methods described in the third aspect or the methods provided in the fourth aspect, the bandwidth occupied by the first reference signal is the sum of the second frequency domain resources and the first frequency domain resources.

[0031] In one possible implementation of the method described in the third aspect or the method provided in the fourth aspect, the time-domain resource corresponding to the first frequency domain resource and the second frequency domain resource is a symbol.

[0032] In one possible implementation of the method described in conjunction with the third aspect or the method provided in the fourth aspect, the configuration information is further used to indicate one or more of the following: data and reference signals are not mapped on the second frequency domain resource, which corresponds to the same time domain resource as the first frequency domain resource; the serving network device does not map data and reference signals on the second frequency domain resource; at least one neighboring cell network device does not map data and reference signals on the second frequency domain resource; and the location of the second frequency domain resource.

[0033] In one possible implementation of the method described in the third aspect or the method provided in the fourth aspect, the first frequency domain resource belongs to different carrier components or frequency bands.

[0034] In one possible implementation of the method described in conjunction with the third aspect or the method provided in the fourth aspect, the network device sends a second message that includes the configuration information, which is any one of a broadcast message, a Radio Resource Control message, or a Long Term Evolution Positioning Protocol (LPP) message.

[0035] In one possible implementation of the method described in conjunction with the third aspect or the method provided in the fourth aspect, the network device receives a measurement result of measuring the first reference signal, the measurement result corresponding to a first time unit, the first time unit being less than a time slot.

[0036] In one possible implementation of the method described in the third aspect or the method provided in the fourth aspect, the network device receives the information of the first time unit.

[0037] In one possible implementation of the method described in conjunction with the third aspect or the method provided in the fourth aspect, the network device receives a first measurement result, which is the difference between a second measurement result and a reference measurement result, the second measurement result being one or more of at least one measurement result obtained by measuring the first reference signal, and the reference measurement result being a statistical value corresponding to the at least one measurement result.

[0038] In one possible implementation of the method described in the third aspect or the method provided in the fourth aspect, the network device receives the reference measurement result.

[0039] In one possible implementation combining the methods provided in the third or fourth aspect, the first frequency domain resource comprises M sub-frequency domain resources, which may be continuous or discontinuous in the frequency domain, where M is a positive integer. Optionally, M is the second comb size of the first reference signal.

[0040] In one possible implementation combining the methods provided in the third or fourth aspect, the second frequency domain resource includes N sub-frequency domain resources, which may be continuous or discontinuous in the frequency domain, where N is a positive integer.

[0041] Optionally, M is equal to N.

[0042] Fifthly, this application provides a communication device, which can be a terminal, a device within a terminal, or a device compatible with a terminal. The communication device can also be a chip system. The communication device can execute the methods described in the first or second aspect. The functions of the communication device can be implemented in hardware or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions. These units or modules can be software and / or hardware. The operations performed by the communication device and its beneficial effects can be found in the methods described in the first or second aspect and their beneficial effects.

[0043] Sixthly, this application provides a communication device, which can be a network device, a device within a network device, or a device compatible with a network device. The communication device can also be a chip system. The communication device can execute the methods described in the third or fourth aspect. The functions of the communication device can be implemented in hardware or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions. The unit or module can be software and / or hardware. The operations performed by the communication device and its beneficial effects can be found in the methods described in the third or fourth aspect and their beneficial effects.

[0044] In a seventh aspect, this application provides a communication device including a processor and an interface circuit. The interface circuit is configured to receive signals from other communication devices outside the communication device and transmit them to the processor, or to send signals from the processor to other communication devices outside the communication device. The processor is configured to implement the method described in the first or second aspect through logic circuits or executable code instructions, or the processor is configured to implement the method described in the third or fourth aspect through logic circuits or executable code instructions.

[0045] Eighthly, this application provides a computer-readable storage medium storing a computer program or instructions that, when executed by a communication device, implement the method described in the first or second aspect, or the method described in the third or fourth aspect.

[0046] Ninthly, this application provides a computer program product including instructions that, when a communication device reads and executes the instructions, cause the communication device to perform the method described in the first or second aspect, or cause the communication device to perform the method described in the third or fourth aspect.

[0047] In a tenth aspect, this application provides a communication system comprising a communication device for performing the method described in the first aspect and a communication device for performing the method described in the third aspect; or, comprising a communication device for performing the method described in the second aspect and a communication device for performing the method described in the fourth aspect. Attached Figure Description

[0048] Figure 1 is a schematic diagram of a communication system provided in an embodiment of this application;

[0049] Figure 2 is a schematic diagram of an NTN-based RAN architecture provided in an embodiment of this application;

[0050] Figure 3 is a schematic diagram of a positioning method based on Doppler information provided in an embodiment of this application;

[0051] Figure 4 is a schematic diagram of different patterns of reference signals corresponding to different comb fractions provided in an embodiment of this application;

[0052] Figure 5 is a schematic diagram of a positioning architecture provided in an embodiment of this application;

[0053] Figure 6 is a flowchart illustrating a communication method provided in an embodiment of this application;

[0054] Figure 7 is a schematic diagram of a first frequency domain resource provided in an embodiment of this application;

[0055] Figure 8 is a schematic diagram of a Doppler measurement process provided in an embodiment of this application;

[0056] Figure 9 is a schematic diagram of a first frequency domain resource and a second frequency domain resource provided in the embodiment.

[0057] Figure 10 is a flowchart illustrating another communication method provided in an embodiment of this application;

[0058] Figure 11 is a schematic diagram of a frequency domain resource corresponding to a first reference signal provided in this application;

[0059] Figure 12 is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0060] Figure 13 is a schematic diagram of another communication device provided in an embodiment of this application. Detailed Implementation

[0061] To facilitate a detailed understanding of the embodiments of this application, the system architecture involved in the embodiments of this application will be described below.

[0062] Figure 1 is a schematic diagram of the architecture of the communication system applied in the embodiments of this application. As shown in Figure 1, the communication system includes a radio access network (RAN) 100 and a core network 200. Optionally, the communication system shown in Figure 1 may also include an Internet 300. RAN 100 includes at least one RAN node (110a and 110b in Figure 1, collectively referred to as 110), and may also include at least one terminal (120a-120j in Figure 1, collectively referred to as 120). RAN 100 may also include other RAN nodes, such as wireless relay devices and / or wireless backhaul devices (not shown in Figure 1). Terminal 120 is wirelessly connected to RAN node 110, and RAN node 110 is wirelessly or wiredly connected to core network 200. The core network equipment in core network 200 and RAN node 110 in RAN 100 can be independent and different physical devices, or they can be the same physical device integrating the logical functions of the core network equipment and the logical functions of the RAN node. Terminals and RAN nodes can be interconnected via wired or wireless means. It should be noted that, in the following text, RAN node 110 may also be referred to as network device 110.

[0063] RAN100 can be an evolved universal terrestrial radio access (E-UTRA) system, a new radio (NR) system, or a future radio access system as defined in the 3rd generation partnership project (3GPP). RAN100 can also include two or more of the above-mentioned different radio access systems. RAN100 can also be an open RAN (O-RAN).

[0064] RAN nodes, also known as radio access network devices, RAN entities, or access nodes, are used to help terminals access communication systems wirelessly. In one application scenario, an RAN node can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next-generation NodeB (gNB) in a 5G mobile communication system, a next-generation base station in a 6G mobile communication system, or a base station in a future mobile communication system. RAN nodes can be macro base stations (as shown in Figure 1, 110a), micro base stations or indoor stations (as shown in Figure 1, 110b), and can also be relay nodes or donor nodes.

[0065] In another application scenario, multiple RAN nodes can collaborate to help terminals achieve wireless access, with different RAN nodes implementing different functions of the base station. For example, a RAN node can be a central unit (CU), a distributed unit (DU), or a radio unit (RU). Here, the CU performs the functions of the base station's Radio Resource Control (RRC) and Packet Data Convergence Protocol (PDCP), and can also perform the functions of the Service Data Adaptation Protocol (SDAP). The DU performs the functions of the base station's Radio Link Control (RANC) and Medium Access Control (MAC) layers, and can also perform some or all of the physical layer functions. For specific descriptions of these protocol layers, refer to the relevant 3GPP technical specifications. The RU can be used to implement radio frequency signal transmission and reception. The CU and DU can be two independent RAN nodes or integrated into the same RAN node, such as within a baseband unit (BBU). The RU can be included in radio frequency equipment, such as in a remote radio unit (RRU) or an active antenna unit (AAU). The CU can be further divided into two types of RAN nodes: CU-control plane and CU-user plane.

[0066] In different systems, RAN nodes may have different names. For example, in an O-RAN system, a CU can be called an open CU (O-CU), a DU can be called an open DU (O-DU), and an RU can be called an open RU (O-RU). The RAN nodes in the embodiments of this application can be implemented through software modules, hardware modules, or a combination of software and hardware modules. For example, a RAN node can be a server loaded with the corresponding software modules. The embodiments of this application do not limit the specific technology or device form used in the RAN nodes. For ease of description, a base station is used as an example of a RAN node in the following description.

[0067] A terminal is a device with wireless transceiver capabilities, capable of sending signals to or receiving signals from a base station. Terminals can also be called terminal equipment, user equipment (UE), mobile station, mobile terminal, etc. Terminals can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, smart transportation, smart cities, etc. Terminals can be mobile phones, tablets, computers with wireless transceiver capabilities, wearable devices, vehicles, airplanes, ships, robots, robotic arms, smart home devices, etc. The embodiments of this application do not limit the specific technology or device form used in the terminal.

[0068] Base stations and terminals can be fixed or mobile. They can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can be deployed on aircraft, balloons, and satellites. The embodiments of this application do not limit the application scenarios of the base stations and terminals.

[0069] The roles of base stations and terminals can be relative. For example, the helicopter or drone 120i in Figure 1 can be configured as a mobile base station. For terminals 120j that access the wireless access network 100 through 120i, terminal 120i is a base station; however, for base station 110a, 120i is a terminal, meaning that 110a and 120i communicate via a wireless air interface protocol. Of course, 110a and 120i can also communicate via a base station-to-base station interface protocol. In this case, relative to 110a, 120i is also a base station. Therefore, both base stations and terminals can be collectively referred to as communication devices. 110a and 110b in Figure 1 can be called communication devices with base station functions, and 120a-120j in Figure 1 can be called communication devices with terminal functions.

[0070] Communication between base stations and terminals, between base stations, and between terminals can be conducted using licensed spectrum, unlicensed spectrum, or both simultaneously. Communication can be conducted using spectrum below 6 GHz, spectrum above 6 GHz, or both simultaneously. The embodiments of this application do not limit the spectrum resources used for wireless communication.

[0071] In the embodiments of this application, the functions of the base station can be executed by modules (such as chips) within the base station, or by a control subsystem that includes base station functions. This control subsystem, including base station functions, can be a control center in the aforementioned application scenarios such as smart grids, industrial control, intelligent transportation, and smart cities. Similarly, the functions of the terminal can be executed by modules (such as chips or modems) within the terminal, or by a device that includes terminal functions.

[0072] In this application, the base station sends downlink signals or downlink information to the terminal, with the downlink information carried on the downlink channel; the terminal sends uplink signals or uplink information to the base station, with the uplink information carried on the uplink channel. In order to communicate with the base station, the terminal needs to establish a radio connection with a cell controlled by the base station. The cell with which the terminal has established a radio connection is called the terminal's serving cell. When the terminal communicates with this serving cell, it is also subject to interference from signals from neighboring cells.

[0073] To facilitate understanding of the relevant content of the embodiments of this application, some terms involved in the embodiments of this application will be explained below. This part is only for the purpose of understanding and should not be regarded as a disclosure or specific limitation of the technical solution of this application.

[0074] 1. Non-terrestrial network (NTN)

[0075] NTN (Network Telecommunications) provides seamless communication coverage for terminals by deploying base stations or part of their functions on non-terrestrial network equipment (such as ships, high-altitude platforms, drones, or satellites), thereby improving the reliability of the communication system. It should be noted that, for ease of understanding, the following description uses satellites as an example of non-terrestrial network equipment in NTN and should not be considered a specific limitation of this application.

[0076] Based on the satellite's orbital altitude, satellite communication systems can be divided into three types: geostationary earth orbit (GEO) satellite communication systems, also known as synchronous orbit satellite systems; medium earth orbit (MEO) satellite communication systems; and low earth orbit (LEO) satellite communication systems.

[0077] For example, please refer to Figure 2, which is a schematic diagram of an NTN-based RAN architecture applicable to embodiments of this application. As shown in Figure 2, the NTN-based RAN architecture may include a terminal, a RAN (or next-generation radio access network, NG-RAN)), core network equipment, and a data network (or the Internet).

[0078] Figure 2(a) illustrates a transparent satellite architecture. The RAN can include RRUs and network devices. RRUs can include satellites and NTN gateways. Terminals and network devices communicate via a User-Universal Terrestrial Radio Access Network (UU) interface. The satellite enables transparent payload transmission between users and network devices. The satellite and NTN gateway can be considered as remote radio units of the network devices, enabling transparent signal forwarding. This means the satellite supports RF filtering, frequency conversion, and amplification without altering the signal waveform. Satellite forwarding is transparent to the terminal; the satellite primarily acts as a Layer 1 (L1) relay, regenerating physical layer signals (i.e., radio frequency filtering, frequency conversion, and amplification), without involving higher protocol layers. Network devices and core network devices can communicate via a Next Generation (NG) interface, exchanging non-access stratum (NAS) signaling from the core network and service data from the terminal.

[0079] Figure 2(b) illustrates a regenerative satellite architecture without an inter-satellite link. The RAN includes satellites and NTN gateways. The satellites, acting as network devices (e.g., base stations), possess the processing capabilities of base stations. Satellites communicate with the NTN gateways via the satellite radio interface (SRI). Terminals communicate with network devices via the Uu interface, and network devices and core network devices communicate via the NG interface. The NG interface facilitates the exchange of NAS signaling from the core network and service data from the terminals.

[0080] Figure 2(c) illustrates a regenerative satellite architecture with an inter-satellite link. The RAN includes satellites and NTN gateways. Satellites act as network devices (e.g., base stations), possessing the processing capabilities of base stations. Satellites communicate with the NTN gateway via SRI. Satellites can communicate with each other via the Xn interface on the inter-satellite link (ISL). Terminals communicate with network devices via the Uu interface, and network devices and core network devices communicate via the NG interface. The NG interface facilitates the exchange of NAS signaling from the core network and service data from the terminals.

[0081] Figure 2(d) illustrates a regenerative satellite architecture with DU processing capabilities at the base station level. The satellite acts as the DU, providing DU processing functionality. The CU and DU can jointly perform the functions of network devices (e.g., base stations). The CU and DU communicate via the F1 interface, and the DU communicates with the NTN gateway via the F1 interface on the SRI. Terminals communicate with the DU via the Uu interface, and the CU and core network devices communicate via the NG interface, exchanging NAS signaling from the core network and service data from the terminal.

[0082] For example, in another satellite architecture with integrated access and backhaul (IAB) functionality, the satellite acts as an IAB node. The IAB node provides wireless backhaul services to nodes (such as terminals) that wirelessly access the wireless backhaul node. Here, wireless backhaul service refers to data and / or signaling backhaul services provided via the wireless backhaul link.

[0083] 2. Doppler frequency shift

[0084] The main concept of the Doppler effect is that the wavelength perceived by an observer changes depending on the relative motion between the observer and the wave source. If the observer and the wave source are moving towards each other, the perceived wavelength is compressed, becoming shorter and thus higher in frequency. Conversely, if the observer and the wave source are moving away from each other, the opposite effect occurs: the perceived wavelength becomes longer and thus lower in frequency. The higher the relative speed between the observer and the wave source, the greater the Doppler effect. The Doppler effect causes the frequency of the signal received at the receiver to differ from the frequency of the signal transmitted at the transmitter; this difference is called the Doppler shift.

[0085] In satellite communication scenarios, due to the satellite's movement and high speed, the relative motion between the satellite and the receiver (such as a mobile phone UE) will cause a Doppler frequency shift, and the corresponding Doppler frequency offset is as follows:

[0086] Where v is the relative velocity between the satellite and the UE, c is the speed of light, and R... e where is the Earth's radius, h is the satellite's orbital altitude, E is the elevation angle, and f is the Earth's radius. c It is the operating frequency band.

[0087] Doppler measurements (including Doppler frequency shift) are widely used in various scenarios. For example, in satellite communication, the Doppler frequency shift caused by satellite movement is significant (potentially tens to hundreds of kHz). Since the frequency of the demodulated signal at the receiving end must match the frequency of the transmitted signal, the Doppler frequency shift will cause distortion in the demodulated signal. The larger the Doppler frequency shift, the greater the deviation between the received and transmitted signals, and the greater the impact on the UE's reception performance. Therefore, Doppler compensation is usually required to ensure reception performance. Another example is in satellite positioning. As shown in Figure 3, the base station in the NTN system sends a positioning reference signal (PRS). The terminal receives this PRS and obtains a Doppler estimation result based on the measurement of this PRS. Based on this Doppler estimation result, the candidate position of the terminal can be determined as a conical surface, also known as a "Doppler equal-frequency conical surface." The vertex of this conical surface represents the location of the base station, and the cone angle is θ, where θ is the angle between the line connecting the base station and the terminal and the direction of the base station's velocity (or, if the base station is located on a satellite, its orbital direction). Thus, a "Doppler equal-frequency conical surface" can be obtained based on the PRS measurement results transmitted by one base station, and multiple "Doppler equal-frequency conical surfaces" can be obtained based on the PRS measurement results transmitted by multiple base stations. The intersection of these multiple "Doppler equal-frequency conical surfaces" with the Earth's surface represents the location of the terminal.

[0088] It is important to understand that, regardless of the scenario, accurate Doppler frequency shift information is required.

[0089] 3. Downlink Positioning Reference Signal (DL-PRS)

[0090] Typically, DL-PRS is generated from a set of frequency-domain sequences with pseudo-random characteristics, exhibiting strong autocorrelation properties. The terminal obtains the time delay or Doppler measurement results by cross-correlation estimation between the local reference signal and the received PRS. 3GPP R16 defines PRS with the following characteristics: 1) Configurable bandwidth; 2) Single-port transmission; 3) Support for periodic transmission; 4) The number of symbols used for PRS transmission within a time slot can be configured to any one of {2, 4, 6, 12}; 5) It can correspond to different PRS patterns, for example, different Combsizes as shown in Figure 4 correspond to different PRS patterns.

[0091] 4. Positioning

[0092] 4.1 Classification of Positioning Methods

[0093] During the terminal positioning process, based on the different location calculation points, positioning methods can be divided into the following categories: 1) Terminal-based positioning method (also known as UE-based positioning method): The terminal performs measurements and calculates its location locally based on the measurement results and positioning auxiliary information (also known as auxiliary data). This positioning auxiliary information can include network device ephemeris information, satellite orbit parameters, clock parameters, reference time, reference position, ionospheric model, space state correction point, integrity service parameters, integrity service alarms, time model list, differential correction information, navigation model, real-time integrity information, tropospheric error information, etc. Optionally, the terminal can also provide the measurement results to other communication devices. 2) UE-assisted positioning method / Location management function (LMF) based positioning method (also known as LMF-based positioning method): The terminal performs measurements to obtain measurement results and sends these results to the LMF, which calculates the terminal's location based on the measurement results and auxiliary data. 3) Standalone positioning method: The terminal performs measurements and location calculations without auxiliary data.

[0094] 4.2 Positioning Architecture

[0095] To facilitate understanding of the positioning method mentioned in this application, this application also provides a schematic diagram of a positioning architecture as shown in Figure 5. The positioning architecture shown in Figure 5 can be used for terminal positioning in 5G, NR, or E-UTRA systems. Optionally, sidelink positioning can be supported regardless of whether the terminal is located within the NG-RAN coverage area (i.e., UE A and UE B in Figure 5) or outside the NG-RAN coverage area (i.e., UE C and UE D in Figure 5). A brief description of some functional entities shown in Figure 5 is provided below. For detailed explanations of each functional entity in Figure 5, please refer to the explanation in protocol TS 38.305.

[0096] The Location-Based Function (LMF) is responsible for supporting different types of location services for a target terminal (i.e., the terminal to be located), including locating the terminal and transmitting auxiliary data to the terminal. Its control plane and user plane are the Evolved Serving Mobile Location Center (E-SMLC) and the Service Location Protocol (SLP), respectively. The LMF may interact with the next-generation evolved Node B (NG-eNB) / next-generation node B (gNB) and the terminal in the following ways: 1) Interacting with the ng-eNB / gNB via NR Location Protocol A (NRPPa) messages, such as obtaining PRS configuration information, sounding reference signal (SRS) configuration information, cell timing, cell location information, etc.; 2) Transmitting terminal capability information, auxiliary information, measurement information, etc., with the terminal via LPP messages; 3) In LMF-based positioning methods, returning the positioning service results (e.g., the terminal's location estimation results) to the access and mobility management function (AMF).

[0097] The Access Management Provider (AMF) is used to implement functions such as access management. It can receive location service requests related to the target terminal from the 5G Core (5GC) location service (LCS) entity; alternatively, the AMF itself can also initiate some location services on behalf of a specific target terminal and forward the location service requests to the LMF. After receiving the location information returned by the terminal, it returns the relevant location information to the 5GC LCS entity.

[0098] The terminal can measure downlink signals from NG-RAN and other sources to support positioning.

[0099] gNB / ng-eNB can provide measurement information to the target terminal and transmit this information to the LMF.

[0100] In Figure 5, the UE connects to the NG-RAN device via the LTE-Uu interface through the NG-eNB, or via the NR-Uu interface through the gNB. The NG-RAN connects to the core network (CN) via the NG-C interface through the AMF network element. The CN includes AMF and LMF network elements. The AMF and LMF network elements are connected via the NL1 interface. It should be understood that the NG-RAN may include one or more ng-eNBs (Figure 5 illustrates one ng-eNB as an example), and / or one or more gNBs (Figure 5 illustrates one gNB as an example). Here, the ng-eNB is an LTE base station accessing the 5G core network, and the gNB is a 5G base station accessing the 5G core network.

[0101] As shown in Figure 5, the LMF network element can interact with the ng-eNB / gNB through the NR positioning protocol annex (NRPPa) messages between the LMF and the base station to obtain positioning reference signal (PRS), sounding reference signal (SRS) configuration information, cell timing, cell location information, etc. It can also transmit capability information, auxiliary data, and measurement information to the UE through the LTE positioning protocol (LPP) messages between the LMF and the UE. Through the interaction between the LMF, ng-eNB / gNB, and UE, positioning technologies such as uplink / downlink time difference of arrival (UL / DL-TDOA), downlink angle of departure (DL-AOD), uplink angle of arrival (UL-AOA), multiple round trip time (Multi-RTT), and carrier phase positioning (CPP) are used to locate the UE.

[0102] Typically, a terminal obtains Doppler information based on multiple reference signals repeatedly transmitted in the time domain. In some scenarios, these repeatedly transmitted reference signals may occupy a long time in the time domain (e.g., multiple time slots). Furthermore, the reference signal and data used for Doppler measurement may be time-division multiplexed, meaning that data cannot be transmitted while the reference signal for Doppler measurement is being transmitted. This can cause several problems: First, because the terminal cannot transmit or receive data or other reference signals during the transmission or reception of the reference signal used for Doppler measurement, and since the reference signal needs to be transmitted as continuously as possible to obtain an accurate Doppler estimate, this significantly impacts data communication. Second, based on the above analysis, obtaining relatively accurate Doppler estimation information requires a long time, during which terminal clock drift will introduce significant errors. For example, in satellite positioning scenarios, the satellite's high speed can cause terminal clock drift to cause positioning auxiliary data (such as satellite position) to become invalid or introduce measurement errors, thus reducing positioning accuracy. Third, the long time required for the terminal to obtain relatively accurate information can also cause excessive latency, especially in initial access or initial positioning scenarios.

[0103] To reduce the time required for a terminal to acquire Doppler measurement results and improve the accuracy of these results, this application provides a communication method and a communication device. The communication method and communication device provided in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0104] Please refer to Figure 6, which is a flowchart illustrating a communication method provided in an embodiment of this application. As shown in Figure 6, the communication method includes the following steps S601 to S604. The method execution entities shown in Figure 6 are illustrated using a terminal and a network device as examples. It can be understood that the method execution entities shown in Figure 6 can also be modules (e.g., chips) in the terminal and modules (e.g., chips, CUs, or DUs) in the network device. Wherein:

[0105] It should be noted that, in one possible implementation, the network device mentioned in this application can be a terrestrial network device (such as a base station). In another possible implementation, the network device mentioned in this application can also be a terrestrial network device in a transparent transmission architecture (denoted as the first network device, such as the network device in the architecture shown in Figure 2(a) or (d) above) or a non-terrestrial network device acting as a relay device (such as a satellite in the architecture shown in Figure 2(a) or (d) above). The first network device communicates with the terminal through this non-terrestrial network device, which forwards signals from the first network device to the terminal. In yet another possible implementation, the network device mentioned in this application can also be a non-terrestrial network device in a regenerative architecture that has all or part of the base station functions (such as the satellite shown in Figure 2(b) or (c)). This network device can directly send signals to the terminal.

[0106] S601. The network device sends configuration information for the first reference signal. Correspondingly, the terminal receives the configuration information for the first reference signal.

[0107] The configuration information indicates that the first frequency domain resource is the frequency domain resource corresponding to the first reference signal. The first frequency domain resource and the second frequency domain resource correspond to the same time domain resource (hereinafter referred to as the first time domain resource for ease of description). The second frequency domain resource does not map data and reference signals.

[0108] For example, the network device can indicate to the terminal via configuration information that the resources corresponding to the first reference signal include: a first frequency domain resource and a first time domain resource. The frequency domain resources corresponding to the first time domain resource include a first frequency domain resource and a second frequency domain resource. One possible scenario is that the first frequency domain resource is the frequency domain resource occupied by the first reference signal, and the second frequency domain resource does not overlap with the first frequency domain resource in the frequency domain. In addition to the first and second frequency domain resources, other frequency domain resources may exist in the frequency domain resources corresponding to the first time domain resource. Another possible scenario is that the first frequency domain resource is the frequency domain resource occupied by the first reference signal, and the second frequency domain resource is the frequency domain resource other than the first frequency domain resource in the frequency domain resources corresponding to the first time domain resource; that is, the second frequency domain resource is the complement of the first frequency domain resource in the frequency domain resources corresponding to the first time domain resource; or it can be understood that the bandwidth occupied by the first reference signal is the sum of the second and first frequency domain resources.

[0109] It is important to understand that the first time-domain resource is less than a single time slot; for example, the first time-domain resource may be one symbol, multiple symbols, or a micro-time slot. When the first time-domain resource is one symbol, the corresponding time-domain resources for the first and second frequency-domain resources are also one symbol.

[0110] It is also important to understand that the absence of data and reference signals mapped on the second frequency domain resources can be interpreted as one or more of the following situations: 1. The terminal does not map data and reference signals on this second frequency domain resource; 2. The network equipment in the serving cell where the terminal is located does not map data and reference signals on this second frequency domain resource; 3. Neighboring network equipment does not map data and reference signals on this second frequency domain resource; 4. Neither the network equipment in the serving cell where the terminal is located nor the neighboring network equipment maps data and reference signals on this second frequency domain resource; 5. All network equipment does not map data and reference signals on this second frequency domain resource. The full text follows.

[0111] It should also be understood that the reference signal not mapped on the second frequency domain resource can be understood as any reference signal including the first reference signal. The fact that data and reference signals are not mapped on the second frequency domain resource mentioned in this application can be understood as the second frequency domain resource not carrying data and signals, or not transmitting data and signals, or not receiving data and signals, or not both transmitting and receiving data and signals, or the power of the resource element (RE) corresponding to the second frequency domain resource is zero or close to zero.

[0112] It should also be understood that the reference signals (including the first reference signal) mentioned in this application can be reference signals used for positioning, such as reference signals used for uplink positioning (e.g., SRS), reference signals used for downlink positioning (e.g., PRS), reference signals used for sidelink positioning (e.g., sidelink positioning reference signal, sidelink PRS), etc., or other reference signals not specifically for positioning, such as synchronization signal block (SSB), channel state information-reference signal (CSI-RS), or time reference signal (TRS), etc. This application does not limit the type of reference signal.

[0113] Specifically, the network device can send the configuration information via broadcast, multicast, or unicast. In one possible implementation, the terminal receives a second message (correspondingly, the network device sends the second message), which includes the configuration information. This second message can be any one of a broadcast message, an RRC message, or an LPP message. It is understood that when the network device is a base station or a satellite, the second message can be a broadcast message or a unicast message (e.g., an RRC message); when the network device is an LMF, the second message can be an LPP message.

[0114] In one possible implementation, the configuration information, in addition to indicating the first frequency domain resources, may also indicate one or more of the following:

[0115] 1) No data and reference signals are mapped on the second frequency domain resources. For example, the configuration information also includes a second indication information, which is used to indicate that no data and reference signals are mapped on the second frequency domain resources. This can be understood as the second indication information indicating that one or more of the terminal, the network device of the serving cell where the terminal is located, the network device of the neighboring cell, and / or all network devices do not map data and reference signals on the second frequency domain resources.

[0116] 2) The serving network device does not map data and reference signals on the second frequency domain resources. For example, the configuration information also includes a third indication information, which is used to indicate that the serving network device does not map data and reference signals on the second frequency domain resources.

[0117] 3) At least one neighboring network device does not map data and reference signals on the second frequency domain resource. For example, the configuration information also includes a fourth indication information, which is used to indicate that at least one neighboring network device does not map data and reference signals on the second frequency domain resource.

[0118] 4) The location of the second frequency domain resource, or understood as the location of the second frequency domain resource in the frequency domain. Configuration information can also be used to indicate the location of the second frequency domain resource, such as its starting position and bandwidth. For example, the pattern corresponding to the first reference signal can be determined based on the Comb size, and the starting position and bandwidth of the first frequency domain resource can be determined based on this pattern, thereby determining the starting position and bandwidth of the second frequency domain resource. Alternatively, the configuration information can directly indicate the starting position and bandwidth of the second frequency domain resource.

[0119] It should be noted that the first frequency domain resource mentioned in this application may belong to the same component carrier (CC) or band, or it may belong to different CCs or bands. For example, the first frequency domain resource is the frequency domain resource on symbol #1 used for transmitting the first reference signal, as shown in Figure 7. This first frequency domain resource includes subcarrier #0, subcarrier #2, subcarrier #4, subcarrier #6, subcarrier #8, and subcarrier #10. Subcarrier #0, subcarrier #2, subcarrier #4, subcarrier #6, subcarrier #8, and subcarrier #10 may correspond to the same CC or band. Alternatively, subcarrier #0, subcarrier #2, and subcarrier #4 may correspond to the same CC or band, while subcarrier #6, subcarrier #8, and subcarrier #10 may correspond to another CC or band; this application does not impose any limitations on this. The second frequency domain resource is the frequency domain resource on symbol #1 that does not map data and any reference signal, as shown in Figure 7. This second frequency domain resource includes subcarrier #1, subcarrier #3, subcarrier #5, subcarrier #7, subcarrier #9, and subcarrier #11.

[0120] S602, The network device sends the first reference signal.

[0121] The network device sends a first reference signal, which corresponds to configuration information. This can be understood as the network device mapping the first reference signal onto a first frequency domain resource indicated by the configuration information and then sending that first reference signal.

[0122] S603. The terminal measures the first reference signal based on the configuration information.

[0123] In other words, the terminal receives the first reference signal according to the configuration information and measures the first reference signal to obtain a measurement result, which includes at least one Doppler information.

[0124] In one possible implementation, the first frequency domain resource includes M sub-frequency domain resources, which may be continuous or discontinuous in the frequency domain, where M is a positive integer. Optionally, M is the second comb size of the first reference signal indicated by the configuration information. In one possible implementation, the second frequency domain resource includes N sub-frequency domain resources, which may be continuous or discontinuous in the frequency domain, where N is a positive integer. Optionally, M equals N. It should be noted that the sub-frequency domain resources mentioned in this application can be one or more subcarriers or other frequency domain resources, and this application does not limit the specific content of the sub-frequency domain resources.

[0125] This configuration information includes the comb size (e.g., M) of the first reference signal, and the number of symbols corresponding to the first reference signal within a time slot is k. It can be understood that, based on this configuration information, the number of REs used to map the first reference signal is configured as follows: One. Among them, is a positive integer less than or equal to 12, and k is a positive integer less than or equal to 14, that is... It is also a positive integer. It's important to understand that, according to the characteristics of the Fourier transform, frequency domain undersampling (also called sampling or downsampling) is equivalent to time domain repetition. When the comb size of the first reference signal is M, it's equivalent to M times undersampling in the frequency domain corresponding to each symbol, meaning the first reference signal is repeated M times in the time domain (within a single symbol). In this case, a schematic diagram of the terminal measuring the first reference signal can be seen in Figure 8, where: S1, the terminal generates a set of RE signals according to the configuration information, which includes M×k signals. S2, the terminal receives the reference signal and performs correlation calculation between the reference signal and the RE signal set to obtain the correlation calculation result. S3, the terminal detects the signal peaks of the M×k signals based on the correlation calculation result to obtain the M×k signal peaks. S4, the terminal calculates the average phase difference between each signal peak; since the phase difference between signal peaks has a certain mathematical relationship with the Doppler frequency shift, such as a linear relationship, the Doppler information corresponding to the k symbols can be obtained based on the average phase difference between each signal peak.

[0126] For example, the configuration information indicates that the Comb size of the first reference signal is 2, and the first reference signal corresponds to 2 symbols within one time slot. The configuration information indicating the first frequency domain resource and the first time domain resource corresponding to the first reference signal is shown in Figure 9. According to the characteristics of the Fourier transform, frequency domain undersampling (sampling or downsampling) is equivalent to time domain repetition. Since the Comb size of the first reference signal is 2, it is equivalent to undersampling the frequency domain corresponding to each symbol by a factor of two, which is equivalent to the first reference signal being repeated twice in the time domain (within a single symbol). One possible implementation includes: 1) The configuration information configures the number of REs used to map the first reference signal to be 12, and the set of RE signals generated by the terminal according to the configuration information includes 4 signals (i.e., the first reference signal corresponds to 2 symbols, and each symbol corresponds to 2 signals); 2) The terminal receives the reference signal and performs correlation calculation between the reference signal and the set of RE signals to obtain the correlation calculation result; 3) The terminal detects the signal peaks of the 4 signals according to the correlation calculation result to obtain the 4 signal peaks; 4) The terminal obtains the average phase difference between each signal peak and obtains the Doppler information corresponding to the 2 symbols based on the average phase difference.

[0127] S604 (optional): The terminal sends the measurement result, which is obtained based on the first reference signal.

[0128] It is understandable that after the terminal measures the first reference signal to obtain a measurement result, the terminal can apply the measurement result (e.g., perform phase compensation or positioning on the signal). In this way, the terminal does not need to send the measurement result to other communication devices (e.g., network devices or LMFs), i.e., step S604 is not executed. Alternatively, if the terminal obtains a measurement result based on the first reference signal, the terminal can send the measurement result to other communication devices (e.g., network devices or LMFs), i.e., step S604 is executed so that other network devices can apply the measurement result (e.g., perform positioning based on the measurement result). The specific method of executing S604 is described in detail below.

[0129] In one possible implementation 1, the terminal sends the measurement result to the network device. This measurement result corresponds to a first time unit, which is less than one time slot. It should be understood that the first time unit is used to indicate the time-domain resources corresponding to the frequency-domain resources mapping the first reference signal; the first time unit can be a symbol, multiple symbols within a time slot, or a micro-time slot, etc. Optionally, the terminal also sends (or is understood to indicate) information about the first time unit corresponding to the measurement result.

[0130] For example, the first reference signal is mapped using the first frequency domain resource shown in Figure 9, where the time domain resources corresponding to the first frequency domain resource are symbols #1 and #2. Exemplarily, the measurement results obtained by the terminal include Doppler information f1 corresponding to symbol #1 and Doppler information f2 corresponding to symbol #2, meaning that the first time units corresponding to the Doppler information f1 and f2 are symbols #1 and #2. In one possible implementation, the terminal sends the Doppler information f1 and f2 to the network device. Optionally, it indicates that the Doppler information f1 and f2 correspond to symbols #1 and #2 (i.e., the first time units).

[0131] In one possible implementation 2, the terminal sends a first measurement result to the network device. This first measurement result is the difference between a second measurement result and a reference measurement result. The second measurement result is one or more measurements obtained by measuring a first reference signal. The reference measurement result is a statistical value corresponding to the at least one measurement result. The reference measurement result can be the maximum, minimum, average, median, or mode corresponding to the at least one measurement result.

[0132] For example, the terminal receives a measurement result consisting of five Doppler frequency shifts (denoted as f0 to f4). These f0 to f4 are obtained by measuring the first reference signal mapped onto the first frequency shift resource corresponding to symbols #1 to #5, meaning the first time unit corresponding to f0 to f4 is symbols #1 to #5. In this case, the terminal uses the maximum value f4 among f0 to f4 as the reference measurement result, determines the difference between each Doppler frequency shift and the reference measurement result, and reports the difference between each Doppler frequency shift and the reference measurement result to the network device (e.g., f0-f4, f1-f4, f2-f4, f3-f4, 0, or f0-f4, f1-f4, f2-f4, f3-f4). This reporting method helps save communication resources when the difference between each Doppler frequency shift is small.

[0133] Optionally, in this embodiment 2, the terminal may also send the reference measurement result to the network device so that the network device can reconstruct at least one measurement result obtained by measuring the first reference signal based on the reference measurement result and the first measurement result.

[0134] In summary, the method described in Figure 6, where the first reference signal is sampled / sampled in the frequency domain (i.e., the bandwidth occupied by the first reference signal), can be equivalently represented in the time domain as a periodic extension of the first reference signal, which is equivalent to obtaining multiple repeating sub-first reference signals in the time domain. In this way, the terminal can measure the first reference signal to obtain Doppler information, which helps to shorten the measurement time for acquiring Doppler information, thereby reducing the impact on data communication and minimizing errors introduced by terminal clock drift.

[0135] It should be understood that in the method described in Figure 6, based on the configuration information of the first reference signal sent by the network device, the terminal can determine whether to obtain Doppler information by measuring the first reference signal corresponding to a single symbol. It should be understood that the first reference signal in this application is not limited to a single symbol; therefore, the description of measurement based on a single symbol of the first reference signal can also be expressed as measurement based on frequency domain repetition or frequency domain information of the first reference signal. When the configuration information of the first reference signal is as described in S601, and the terminal has the capability to obtain Doppler information by measuring the first reference signal using a single symbol (e.g., the terminal locally supports related operations and algorithms), then the terminal can obtain Doppler information by measuring the first reference signal using a single symbol. This application also provides a communication method, the main difference between which is that the terminal reports whether it has a first capability (i.e., the capability to obtain Doppler information by measuring the first reference signal using a single symbol) or requests desired configuration information through an indication message. Further, the network device configures the corresponding first reference signal for the terminal based on this indication message. These two methods can be implemented individually or in combination (the specific implementation process can be found in the following description), and this application does not impose any limitations.

[0136] Please refer to Figure 10, which is a flowchart illustrating another communication method provided in this application embodiment. As shown in Figure 10, the communication method includes the following steps S1001 to S1005. The method execution entity shown in Figure 10 is illustrated using a terminal and a network device as examples. It can be understood that the method execution entity shown in Figure 10 can also be a module (e.g., a chip) in the terminal and a module (e.g., a chip, CU, or DU) in the network device. It should be noted that the network device mentioned in this application can be the network device in the architecture shown in Figure 2(a) or (d) above, or it can be a non-terrestrial network device serving as a base station (e.g., a satellite shown in Figure 2(b) or (c)). Wherein:

[0137] S1001, the terminal sends first indication information to the network device, the first indication information being used to indicate the first comb size of the first reference signal and / or whether a first capability is supported. The first capability is the ability to obtain measurement results based on the first reference signal corresponding to a single symbol.

[0138] It should be understood that the first Comb size of the first reference signal can be understood as the Comb size expected by the terminal (e.g., the reference Comb size recommended by the terminal to the network device), or as the maximum Comb size supported by the terminal. It should be noted that the maximum Comb size supported by the terminal can be used to determine the Doppler estimation range, which can be used by the network to determine a suitable reference signal configuration. In one possible implementation, the Doppler estimation range (denoted as w), the subcarrier spacing (SCS), and the maximum Comb size supported by the terminal satisfy the condition shown in equation (1): w = ±(SCS / 2) × Comb size (1)

[0139] It should also be understood that this first capability can also be described as the capability to obtain measurement results based on frequency domain repetition. Alternatively, this first capability can also be described as the capability to obtain measurement results based on a single-symbol first reference signal.

[0140] In one possible implementation, the terminal sends a first message (and the network device receives the first message accordingly), the first message containing first indication information. This first message can be a capability message or an on-demand request message. That is, the first indication information can be sent by the terminal to the network device via a capability message, i.e., the terminal carries the first indication information in its terminal capability reporting message. Alternatively, the first information can also be sent by the terminal to the network device via an on-demand request message for a reference signal, i.e., the terminal sends the first indication information to the network device according to its own needs, expecting the network to configure a reference signal suitable for the first capability. Or, the first information can be other messages, which are not limited in this application.

[0141] It should be understood that the on-demand request message mentioned in this application refers to an on-demand request reference signal message. The 3GPP communication protocol supports on-demand reference signal request features; for example, a terminal can initiate an on-demand PRS request to the network device on demand, indicating the terminal's desired reference signal configuration, such as bandwidth and period. In one possible implementation, the first message mentioned in this application can also be an on-demand request message (e.g., an on-demand PRS request), in which the terminal can carry first indication information, indicating the first combsize of the terminal's first reference signal.

[0142] S1002, The network device sends configuration information for the first reference signal. Correspondingly, the terminal receives the configuration information for the first reference signal.

[0143] Based on the first indication information, if the network device determines that the terminal has a first capability, then the network device can send configuration information of the first reference signal to the terminal based on the terminal's first capability. The following two scenarios will be described in detail regarding this configuration information.

[0144] Case 1: The method described in Figure 6 is not used in conjunction with the method described in Figure 10, which is implemented alone.

[0145] In this case, the configuration information indicates the first frequency domain resource corresponding to the first reference signal, but does not indicate any information about the second frequency domain resource. That is, the configuration information does not indicate one or more of the following: 1) data and reference signals are not mapped on the second frequency domain resource; 2) the serving network device does not map data and reference signals on the second frequency domain resource; 3) at least one neighboring cell network device does not map data and reference signals on the second frequency domain resource; 4) the location of the second frequency domain resource. A description of the first or second frequency domain resource can be found in Figure 6, and will not be repeated here.

[0146] In one possible example, the configuration information is used to configure a first reference signal, which includes the comb fraction of the first reference signal. For example, when the configuration information includes 2 comb fractions, the pattern of the multi-symbol first reference signal configured by the configuration information can be as shown in Figure 11(a), or the pattern of the single-symbol first reference signal configured by the configuration information can be as shown in Figure 11(c); when the configuration information includes 4 comb fractions, the pattern of the multi-symbol first reference signal configured by the configuration information can be as shown in Figure 11(b), or the pattern of the single-symbol first reference signal configured by the configuration information can be as shown in Figure 11(d). Through this configuration method, the network configures the first frequency domain resources for mapping the first reference signal to the terminal via the configuration information, without needing to indicate the second frequency domain resources to the terminal, which helps reduce network resource overhead.

[0147] In another possible example, the configuration information is used to configure a first reference signal for a single symbol, and the pattern of the first reference signal configured by the configuration information is shown in Figure 11. For example, the network device and the terminal agree in advance (e.g., through a communication protocol) not to map data and reference signals on frequency domain resources outside the first frequency domain resource. Alternatively, the terminal directly measures the Doppler information according to the first reference signal for a single symbol. The understanding of not mapping data and reference signals on frequency domain resources outside the first frequency domain resource can be referred to the understanding of not mapping data and reference signals on the second frequency domain resource in the aforementioned S601, and will not be repeated here. Through this configuration method, the network configures the first frequency domain resource for mapping the first reference signal to the terminal through the configuration information, without needing to indicate the information of the second frequency domain resource to the terminal, which helps to reduce network resource overhead.

[0148] Scenario 2: The method described in Figure 10 is combined with the method described in Figure 6.

[0149] In this case, in addition to indicating the first frequency domain resource corresponding to the first reference signal, the configuration information is also used to indicate any of the following: 1) data and reference signals are not mapped on the second frequency domain resource; 2) the serving network device does not map data and reference signals on the second frequency domain resource; 3) at least one neighboring cell network device does not map data and reference signals on the second frequency domain resource; 4) the location of the second frequency domain resource. Specifically, a description of the configuration information can be found in the description of the configuration information in the aforementioned S601.

[0150] In summary, it can be understood that, based on the first reference signal configured with configuration information, the terminal can obtain the measurement result according to the first reference signal corresponding to a single symbol.

[0151] S1003, The network device sends the first reference signal.

[0152] S1004. The terminal measures the first reference signal based on the configuration information.

[0153] S1005 (optional): The terminal sends the measurement result corresponding to the first reference signal.

[0154] The specific implementation methods of S1003 to S1005 can be found in the detailed description of S602 to S604 above, and will not be repeated here.

[0155] In summary, the method described in Figure 10, where the first reference signal is sampled / sampled in the frequency domain (i.e., the bandwidth occupied by the first reference signal), can be equivalently represented in the time domain as a periodic extension of the first reference signal, resulting in multiple repeating sub-first reference signals in the time domain. In this way, when the terminal has the first capability, it can measure the first reference signal to obtain Doppler information, which helps to shorten the measurement time for acquiring Doppler information, thereby reducing the impact on data communication and minimizing errors introduced by terminal clock drift.

[0156] It is understood that, in order to achieve the functions in the above embodiments, the terminal includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should readily recognize that, based on the units and method steps described in conjunction with the embodiments disclosed in this application, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software transceiver units driving the hardware depends on the specific application scenario and design constraints of the technical solution.

[0157] Figures 12 and 13 are schematic diagrams illustrating the possible structures of communication devices provided in embodiments of this application. These communication devices can be used to implement the functions of terminals or network devices in the above method embodiments, and thus can also achieve the beneficial effects of the above method embodiments. In the embodiments of this application, the communication device can be the terminal 120 shown in Figure 1, or it can be a module (such as a chip) applied to the terminal; alternatively, the communication device can be the network device 110 shown in Figure 1, or it can be a module (such as a chip) applied to the network device.

[0158] As shown in Figure 12, the communication device 1200 includes a processing unit 1210 and a transceiver unit 1220. The communication device 1200 is used to implement the functions of the terminal in the method embodiments shown in Figure 6 or Figure 10 above.

[0159] When the communication device 1200 is used to implement the function of the terminal in the method embodiment shown in FIG6: the transceiver unit 1220 is used to receive configuration information of the first reference signal, the configuration information is used to indicate that the first frequency domain resource is the frequency domain resource corresponding to the first reference signal, the first frequency domain resource and the second frequency domain resource correspond to the same time domain resource, and the second frequency domain resource does not map data and reference signal; the processing unit 1210 is used to measure the first reference signal based on the configuration information.

[0160] Alternatively, when the communication device 1200 is used to implement the functions of the terminal in the method embodiment shown in FIG10: the transceiver unit 1220 is used to send first indication information, which indicates a first Combsize of the first reference signal and / or whether it supports a first capability, the first capability being the ability to obtain measurement results based on the first reference signal corresponding to a single symbol; the transceiver unit 1220 is also used to receive configuration information of the first reference signal, which indicates that the first frequency domain resource is the frequency domain resource corresponding to the first reference signal; the processing unit 1210 is used to measure the first reference signal based on the configuration information. Optionally, the transceiver unit 1220 is also used to send a first message, which includes the first indication information, the first message being a capability message or an on-demand request message, the on-demand request message being an on-demand request reference signal message. Optionally, the first frequency domain resource and the second frequency domain resource correspond to the same time domain resource, and data and reference signals are not mapped on the second frequency domain resource.

[0161] In one possible implementation of the method described in conjunction with Figure 6 or Figure 10, the bandwidth occupied by the first reference signal is the sum of the second frequency domain resource and the first frequency domain resource.

[0162] In one possible implementation of the method described in conjunction with Figure 6 or Figure 10, the time-domain resource corresponding to the first frequency domain resource and the second frequency domain resource is a symbol.

[0163] In one possible implementation of the method described in conjunction with Figure 6 or Figure 10, the configuration information is also used to indicate one or more of the following:

[0164] Data and reference signals are not mapped on the second frequency domain resource, and the second frequency domain resource corresponds to the same time domain resource as the first frequency domain resource.

[0165] The service network equipment does not map data and reference signals on this second frequency domain resource;

[0166] At least one neighboring cell network device does not map data and reference signals on the second frequency domain resources;

[0167] The location of this second frequency domain resource.

[0168] In one possible implementation of the method described in conjunction with Figure 6 or Figure 10, the first frequency domain resource belongs to different carrier components or frequency bands.

[0169] In one possible implementation of the method described in conjunction with Figure 6 or Figure 10, the transceiver unit 1220 is further configured to receive a second message, which includes the configuration information, and the second message is any one of a broadcast message, a radio resource control message, or a Long Term Evolution Positioning Protocol (LPP) message.

[0170] In one possible implementation of the method described in conjunction with Figure 6 or Figure 10, the transceiver unit 1220 is further configured to transmit a measurement result obtained based on the first reference signal, the measurement result corresponding to a first time unit, the first time unit being less than a time slot.

[0171] In one possible implementation of the method described in conjunction with Figure 6 or Figure 10, the transceiver unit 1220 is also configured to transmit information of the first time unit.

[0172] In one possible implementation of the method described in conjunction with FIG6 or FIG10, the transceiver unit 1220 is further configured to transmit a first measurement result, which is the difference between a second measurement result and a reference measurement result, wherein the second measurement result is one or more of at least one measurement result obtained based on the first reference signal, and the reference measurement result is a statistical value of the at least one measurement result.

[0173] In one possible implementation of the method described in conjunction with Figure 6 or Figure 10, the transceiver unit 1220 is also used to transmit the reference measurement result.

[0174] In one possible implementation of the method described in conjunction with Figure 6 or Figure 10, the first frequency domain resource includes M sub-frequency domain resources, which are discontinuous in the frequency domain, where M is a positive integer. Optionally, M is the second comb size of the first reference signal.

[0175] In one possible implementation of the method described in conjunction with Figure 6 or Figure 10, the second frequency domain resource comprises N sub-frequency domain resources, which are discontinuous in the frequency domain, where N is a positive integer. Optionally, M equals N.

[0176] For a more detailed description of the transceiver unit 1220 and the processing unit 1210, please refer to the relevant description of the terminal in the method embodiment shown in Figure 6 or Figure 10.

[0177] As shown in Figure 12, the communication device 1200 includes a processing unit 1210 and a transceiver unit 1220. The communication device 1200 is used to implement the functions of the network device in the method embodiments shown in Figure 6 or Figure 10 above.

[0178] When the communication device 1200 is used to implement the function of the network device in the method embodiment shown in FIG6: the transceiver unit 1220 is used to send configuration information of the first reference signal, the configuration information being used to indicate that the first frequency domain resource is the frequency domain resource corresponding to the first reference signal, the first frequency domain resource and the second frequency domain resource correspond to the same time domain resource, and the second frequency domain resource is not mapped to data and reference signal; the transceiver unit 1220 is also used to send the first reference signal.

[0179] Alternatively, when the communication device 1200 is used to implement the functions of the network device in the method embodiment shown in FIG10: the transceiver unit 1220 is configured to receive first indication information, the first indication information being used to indicate a first comb size of a first reference signal and / or whether a first capability is supported, the first capability being the ability to obtain measurement results based on the first reference signal corresponding to a single symbol; the transceiver unit 1220 is further configured to transmit configuration information of the first reference signal, the configuration information being used to indicate that the first frequency domain resource is the first frequency domain resource corresponding to the first reference signal; the transceiver unit 1220 is further configured to transmit the first reference signal. Optionally, the transceiver unit 1220 is further configured to receive a first message, the first message containing the first indication information, the first message being a capability message or an on-demand request message, the on-demand request message being an on-demand request reference signal message. Optionally, the first frequency domain resource and the second frequency domain resource correspond to the same time domain resource, and data and reference signals are not mapped on the second frequency domain resource.

[0180] In one possible implementation of the method described in conjunction with Figure 6 or Figure 10, the bandwidth occupied by the first reference signal is the sum of the second frequency domain resource and the first frequency domain resource.

[0181] In one possible implementation of the method described in conjunction with Figure 6 or Figure 10, the time-domain resource corresponding to the first frequency domain resource and the second frequency domain resource is a symbol.

[0182] In one possible implementation of the method described in conjunction with Figure 6 or Figure 10, the configuration information is also used to indicate one or more of the following:

[0183] Data and reference signals are not mapped on the second frequency domain resource, and the second frequency domain resource corresponds to the same time domain resource as the first frequency domain resource.

[0184] The service network equipment does not map data and reference signals on this second frequency domain resource;

[0185] At least one neighboring cell network device does not map data and reference signals on the second frequency domain resources;

[0186] The location of this second frequency domain resource.

[0187] In one possible implementation of the method described in conjunction with Figure 6 or Figure 10, the first frequency domain resource belongs to different carrier components or frequency bands.

[0188] In one possible implementation of the method described in conjunction with Figure 6 or Figure 10, the transceiver unit 1220 is further configured to send a second message, which includes the configuration information, and the second message is any one of a broadcast message, a radio resource control message, or a Long Term Evolution Positioning Protocol (LPP) message.

[0189] In one possible implementation of the method described in conjunction with Figure 6 or Figure 10, the transceiver unit 1220 is further configured to receive a measurement result based on the first reference signal, the measurement result corresponding to a first time unit, the first time unit being less than one time slot.

[0190] In one possible implementation of the method described in conjunction with Figure 6 or Figure 10, the transceiver unit 1220 is also configured to receive information from the first time unit.

[0191] In one possible implementation of the method described in conjunction with FIG6 or FIG10, the transceiver unit 1220 is further configured to receive a first measurement result, which is the difference between a second measurement result and a reference measurement result, wherein the second measurement result is one or more of at least one measurement result obtained based on the first reference signal, and the reference measurement result is a statistical value of the at least one measurement result.

[0192] In one possible implementation of the method described in conjunction with Figure 6 or Figure 10, the transceiver unit 1220 is also configured to receive the reference measurement result.

[0193] In one possible implementation of the method described in conjunction with Figure 6 or Figure 10, the first frequency domain resource includes M sub-frequency domain resources, which are discontinuous in the frequency domain, where M is a positive integer. Optionally, M is the second comb size of the first reference signal.

[0194] In one possible implementation of the method described in conjunction with Figure 6 or Figure 10, the second frequency domain resource includes N sub-frequency domain resources, which may be continuous or discontinuous in the frequency domain, where N is a positive integer. Optionally, M equals N.

[0195] For a more detailed description of the transceiver unit 1220 and the processing unit 1210, please refer to the relevant description of the network device in the method embodiment shown in Figure 6 or Figure 10.

[0196] As shown in Figure 13, the communication device 1300 includes a processor 1310 and an interface circuit 1320. The processor 1310 and the interface circuit 1320 are coupled to each other. It is understood that the interface circuit 1320 can be a transceiver or an input / output interface. Optionally, the communication device 1300 may also include a memory 1330 for storing instructions executed by the processor 1310, or storing input data required by the processor 1310 to execute instructions, or storing data generated after the processor 1310 executes instructions.

[0197] When the communication device 1300 is used to implement the method shown in FIG6 or FIG10, the processor 1310 is used to implement the function of the processing unit 1210, and the interface circuit 1320 is used to implement the function of the transceiver unit 1220.

[0198] When the aforementioned communication device is a chip applied to a terminal, the terminal chip implements the functions of the terminal in the above method embodiments. The terminal chip receives information from the base station, which can be understood as the information being first received by other modules in the terminal (such as an RF module or antenna), and then sent to the terminal chip by these modules. The terminal chip sends information to the base station, which can be understood as the information being first sent to other modules in the terminal (such as an RF module or antenna), and then sent to the base station by these modules.

[0199] When the aforementioned communication device is a chip used in a network device, the network device chip implements the functions of the network device in the above method embodiments. The network device chip receives information from the terminal, which can be understood as the information being first received by other modules (such as radio frequency modules or antennas) in the network device, and then sent to the network device chip by these modules. The network device chip sends information to the terminal, which can be understood as the information being forwarded to other modules (such as radio frequency modules or antennas) in the network device, and then sent to the terminal by these modules.

[0200] In this application, entity A sends information to entity B, either directly or indirectly through other entities. Similarly, entity B receives information from entity A, either directly or indirectly through other entities. Entities A and B can be RAN nodes or terminals, or modules within RAN nodes or terminals. Information transmission and reception can be between RAN nodes and terminals, such as between a base station and a terminal; between two RAN nodes, such as between a CU and a DU; or between different modules within a single device, such as between a terminal chip and other modules of the terminal, or between a base station chip and other modules of the base station.

[0201] It is understood that the processor in the embodiments of this application can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. A general-purpose processor can be a microprocessor or any conventional processor.

[0202] The method steps in the embodiments of this application can be implemented in hardware or in software instructions executable by a processor. The software instructions can consist of corresponding software modules, which can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, registers, hard disks, portable hard disks, CD-ROMs, or any other form of storage medium known in the art. An exemplary storage medium is coupled to a processor, enabling the processor to read information from and write information to the storage medium. The storage medium can also be a component of the processor. The processor and storage medium can reside in an ASIC. Alternatively, the ASIC can reside in a base station or terminal. The processor and storage medium can also exist as discrete components in a base station or terminal.

[0203] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented, in whole or in part, as a computer program product. A computer program product includes one or more computer programs or instructions. When a computer program or instruction is loaded and executed on a computer, all or part of the processes or functions of the embodiments of this application are performed. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user equipment, or other programmable device. The computer program or instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, a computer program or instructions can be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium, such as a floppy disk, hard disk, or magnetic tape; it can also be an optical medium, such as a digital video optical disc; or it can be a semiconductor medium, such as a solid-state drive. The computer-readable storage medium may be a volatile or non-volatile storage medium, or may include both types of storage media.

[0204] In the various embodiments of this application, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of different embodiments are consistent and can be referenced by each other. The technical features of different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0205] In this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. In the textual description of this application, the character " / " generally indicates an "or" relationship between the preceding and following related objects; in the formulas of this application, the character " / " indicates a "division" relationship between the preceding and following related objects. "Including at least one of A, B, and C" can mean: including A; including B; including C; including A and B; including A and C; including B and C; including A, B, and C.

[0206] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application. The order of the process numbers described above does not imply the order of execution; the execution order of each process should be determined by its function and internal logic.

Claims

1. A communication method, characterized in that, The method includes: Send a first indication message, the first indication message being used to indicate the first comb fraction size of the first reference signal and / or whether it supports a first capability, the first capability being the ability to obtain measurement results based on the first reference signal corresponding to a single symbol; The configuration information for receiving the first reference signal is used to indicate that the first frequency domain resource is the frequency domain resource corresponding to the first reference signal. The first reference signal is measured based on the configuration information.

2. The method according to claim 1, characterized in that, The sending of the first indication information includes: Send a first message, the first message containing the first indication information, the first message being a capability message or an on-demand request message, the on-demand request message being an on-demand request reference signal message.

3. The method according to claim 1 or 2, characterized in that, The first frequency domain resource and the second frequency domain resource correspond to the same time domain resource, and the second frequency domain resource does not map data and reference signals.

4. A communication method, characterized in that, The method includes: The configuration information for receiving the first reference signal is used to indicate that the first frequency domain resource is the frequency domain resource corresponding to the first reference signal. The first frequency domain resource and the second frequency domain resource correspond to the same time domain resource. Data and reference signals are not mapped on the second frequency domain resource. The first reference signal is measured based on the configuration information.

5. The method according to claim 3 or 4, characterized in that, The time-domain resource corresponding to the first frequency domain resource and the second frequency domain resource is a symbol.

6. The method according to any one of claims 3-5, characterized in that, The configuration information is also used to indicate one or more of the following: Data and reference signals are not mapped on the second frequency domain resource, and the second frequency domain resource and the first frequency domain resource correspond to the same time domain resource; The service network equipment does not map data and reference signals on the second frequency domain resources; At least one neighboring network device does not map data and reference signals on the second frequency domain resources; The location of the second frequency domain resource.

7. The method according to any one of claims 3-6, characterized in that, The bandwidth occupied by the first reference signal is the sum of the second frequency domain resources and the first frequency domain resources.

8. The method according to any one of claims 1-7, characterized in that, The first frequency domain resources belong to different carrier components or frequency bands.

9. The method according to any one of claims 1-8, characterized in that, The configuration information for receiving the first reference signal includes: Receive a second message, the second message including the configuration information, the second message being any one of a broadcast message, a radio resource control message, or a Long Term Evolution Positioning Protocol (LPP) message.

10. The method according to any one of claims 1-9, characterized in that, The method further includes: The measurement results are sent, which are obtained based on the first reference signal and correspond to a first time unit, which is less than one time slot.

11. The method according to claim 10, characterized in that, The method further includes: Send the information from the first time unit.

12. The method according to any one of claims 1-11, characterized in that, The method further includes: Send a first measurement result, which is the difference between a second measurement result and a reference measurement result. The second measurement result is one or more of at least one measurement result obtained based on the first reference signal, and the reference measurement result is a statistical value of the at least one measurement result.

13. The method according to any one of claims 1-12, characterized in that, The first frequency domain resource includes M sub-frequency domain resources, which are not contiguous in the frequency domain, and M is a positive integer.

14. A communication method, characterized in that, The method further includes: Receive first indication information, the first indication information being used to indicate the comb size of the first reference signal and / or whether it supports a first capability, the first capability being the ability to obtain measurement results based on the first reference signal corresponding to a single symbol; The configuration information for sending the first reference signal is used to indicate that the first frequency domain resource is the first frequency domain resource corresponding to the first reference signal; Send the first reference signal.

15. The method according to claim 14, characterized in that, The receiving of the first indication information includes: Receive a first message, the first message containing the first indication information, the first message being a capability message or an on-demand request message for a reference signal, the on-demand request message being an on-demand request for a reference signal message.

16. The method according to claim 14 or 15, characterized in that, The first frequency domain resource and the second frequency domain resource correspond to the same time domain resource, and the second frequency domain resource does not map data and reference signals.

17. A communication method, characterized in that, The method includes: Configuration information for transmitting a first reference signal, wherein the configuration information is used to indicate that the first frequency domain resource is the frequency domain resource corresponding to the first reference signal, the first frequency domain resource and the second frequency domain resource correspond to the same time domain resource, and the second frequency domain resource does not map data and reference signal; Send the first reference signal.

18. The method according to claim 16 or 17, characterized in that, The time-domain resource corresponding to the first frequency domain resource and the second frequency domain resource is a symbol.

19. The method according to any one of claims 16-18, characterized in that, The configuration information is also used to indicate one or more of the following: Data and reference signals are not mapped on the second frequency domain resource, and the second frequency domain resource and the first frequency domain resource correspond to the same time domain resource; The service network equipment does not map data and reference signals on the second frequency domain resources; At least one neighboring network device does not map data and reference signals on the second frequency domain resources; The location of the second frequency domain resource.

20. The method according to any one of claims 16-19, characterized in that, The bandwidth occupied by the first reference signal is the sum of the second frequency domain resources and the first frequency domain resources.

21. The method according to any one of claims 14-20, characterized in that, The first frequency domain resources belong to different carrier components or frequency bands.

22. The method according to any one of claims 14-21, characterized in that, The configuration information for transmitting the first reference signal includes: Send a second message, which includes the configuration information, and the second message is any one of a broadcast message, a radio resource control message, or a Long Term Evolution Positioning Protocol (LPP) message.

23. The method according to any one of claims 14-22, characterized in that, The method further includes: The measurement result is received based on the first reference signal and corresponds to a first time unit, which is less than one time slot.

24. The method according to claim 23, characterized in that, The method further includes: Receive information from the first time unit.

25. The method according to any one of claims 13-24, characterized in that, The method further includes: Receive a first measurement result, which is the difference between a second measurement result and a reference measurement result, wherein the second measurement result is one or more of at least one measurement result obtained by measuring the first reference signal, and the reference measurement result is a statistical value corresponding to the at least one measurement result.

26. The method according to any one of claims 13-25, characterized in that, The first frequency domain resource includes M sub-frequency domain resources, which are not contiguous in the frequency domain, and M is a positive integer.

27. A communication device, characterized in that, It includes a module for performing the method as described in any one of claims 1-13, or includes a module for performing the method as described in any one of claims 14-26.

28. A communication device, characterized in that, The device includes a processor and an interface circuit. The interface circuit is used to receive signals from other communication devices besides the communication device and transmit them to the processor, or to send signals from the processor to other communication devices besides the communication device. The processor is used to implement the method as described in any one of claims 1-13 through logic circuits or executable code instructions, or the processor is used to implement the method as described in any one of claims 14-26 through logic circuits or executable code instructions.

29. A computer-readable storage medium, characterized in that, The storage medium stores a computer program or instructions that, when executed by a communication device, cause the communication device to implement the method as described in any one of claims 1-13, or to implement the method as described in any one of claims 14-26.

30. A computer program product, characterized in that, The computer program product includes a computer program or instructions that, when executed by a communication device, cause the communication device to implement the method as described in any one of claims 1-13, or to implement the method as described in any one of claims 14-26.

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