Communication method and apparatus for reference signal measurement

Abstract

A communication method and apparatus for reference signal measurement, which method and apparatus are applied to the technical field of communications. The method comprises: a first apparatus receiving first information, which is used for configuring a first CSI-RS measurement resource, wherein the first CSI-RS measurement resource is a CSI-RS measurement resource of a first candidate cell; and then, the first apparatus performing CSI-RS measurement on the basis of the first CSI-RS measurement resource. By means of the method, first information can be used for configuring a CSI-RS measurement resource of a candidate cell, such that when performing cell measurement, a first apparatus can measure a CSI-RS of the candidate cell. Since the CSI-RS occupies a relatively large bandwidth, by means of the method, the first apparatus can determine the signal quality of the candidate cell across a relatively large bandwidth.

Description

A communication method and apparatus for measuring reference signals

[0001] Cross Reference to Related Applications

[0002] This application claims priority to the Chinese Patent Application No. 202411392358.3, filed on September 30, 2024, and entitled "A communication method and apparatus for measuring reference signals", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the field of communication technology, and in particular to a communication method and apparatus for measuring reference signals. BACKGROUND

[0004] In a mobile communication system, a transmitting device can transmit a reference signal. A receiving device can perform measurement and estimation according to the received reference signal. For example, the receiving device can obtain a channel estimation result between the transmitting device and the receiving device by using channel reciprocity, and then perform communication according to the channel estimation result.

[0005] How to measure the reference signal needs further research. SUMMARY

[0006] The present application provides a communication method and apparatus for measuring reference signals.

[0007] In a first aspect, an embodiment of the present application provides a communication method, which can be applied to a first device. The first device can be a terminal, or a device (for example, a module, a communication module, a circuit or a chip responsible for communication function (such as a modem chip, also known as a baseband chip, or a system on chip (SoC) chip or a system in package (SIP) chip containing a modem core), a chip system or a processor) in the terminal, or a logic node, a logic module or software capable of realizing all or part of the terminal function.

[0008] The method can include: receiving, by the first device, first information, the first information being used for configuring a first channel state information reference signal (CSI-RS) measurement resource, the first CSI-RS measurement resource being a CSI-RS measurement resource of a first candidate cell. The first device performs CSI-RS measurement according to the first CSI-RS measurement resource.

[0009] Exemplarily, the first information can be radio resource control (RRC) configuration information. It should be understood that the first information can have other names, such as configuration information, indication information, or resource indication information, as long as it has the same function, which is within the protection scope of the present application.

[0010] Through the method, the first information can be used to configure the CSI-RS measurement resource of the candidate cell, so that the first device can measure the CSI-RS of the candidate cell when performing cell measurement. The CSI-RS occupies a larger bandwidth, and therefore, through the method, the first device can determine the signal quality of a larger bandwidth of the candidate cell.

[0011] In a second aspect, an embodiment of the present application provides a communication method, which can be applied to a second device. The second device can be an access network device, or can be a device (for example, a module, a communication module, a circuit or a chip responsible for communication function (such as a modem chip, or a SoC chip or a SIP chip containing a modem core), a chip system or a processor) in the access network device, or can be a logic node, a logic module or software capable of realizing all or part of the function of the access network device.

[0012] The method can include: the second device sending first information, the first information being used to configure a first CSI-RS measurement resource, the first CSI-RS measurement resource being a CSI-RS measurement resource of a first candidate cell. The first device can receive a measurement result, the measurement result being obtained by performing CSI-RS measurement according to the first CSI-RS measurement resource.

[0013] Exemplarily, the first information can be RRC configuration information. It should be understood that the first information can have other names, such as configuration information, indication information, or resource indication information, as long as it has the same function, which is within the protection scope of the present application.

[0014] Through the method, the first information can be used to configure the CSI-RS measurement resource of the candidate cell for the first device, so that the first device can measure the CSI-RS of the candidate cell when performing cell measurement. The CSI-RS occupies a larger bandwidth, and therefore, through the method, the first device can determine the signal quality of a larger bandwidth of the candidate cell.

[0015] Based on the first aspect or the second aspect, in a possible design, the first device performs CSI-RS measurement according to the first CSI-RS measurement resource, including one or a combination of the following:

[0016] The first device measures the CSI-RS in the bandwidth of the first CSI-RS measurement resource. In this way, the first device can measure the CSI-RS in the bandwidth of the first CSI-RS measurement resource, and thus can accurately determine the signal quality of the first candidate cell within the bandwidth of the first CSI-RS measurement resource.

[0017] The second device measures the CSI-RS in the first overlapping part, where the first overlapping part is an overlapping part of the bandwidth of the first CSI-RS measurement resource and the bandwidth of the serving cell. For example, the serving cell includes one or more of the following: a primary cell (PCell), a primary secondary cell (PSCell), a special cell (sPCell), or a secondary cell (SCell). Alternatively, when the serving cell includes multiple cells, the bandwidth of the serving cell can be the sum of the bandwidths of the multiple cells, for example, can be the union of the bandwidths of the multiple cells. In this way, the first device can measure the CSI-RS in the overlapping part of the bandwidth of the first CSI-RS measurement resource and the bandwidth of the serving cell, and thus can accurately determine the signal quality of the first candidate cell within the bandwidth of the overlapping part, and can avoid the problem that the first CSI-RS measurement resource cannot be measured when the bandwidth of the first CSI-RS measurement resource is large.

[0018] The third device measures the CSI-RS in the second overlapping part, where the second overlapping part is an overlapping part of the bandwidth of the first CSI-RS measurement resource and the bandwidth of the active bandwidth part (BWP) of the serving cell. For example, the serving cell includes one or more of the following: a PCell, a PSCell, a sPCell, or a SCell. Alternatively, when the serving cell includes multiple cells, the bandwidth of the active BWP of the serving cell can be the sum of the bandwidths of the active BWPs of the multiple cells, for example, can be the union of the bandwidths of the active BWPs of the multiple cells. In this way, the first device can measure the CSI-RS in the overlapping part of the bandwidth of the first CSI-RS measurement resource and the bandwidth of the active BWP of the serving cell, and thus can accurately determine the signal quality of the first candidate cell within the bandwidth of the overlapping part, and can avoid the problem that the first CSI-RS measurement resource cannot be measured when the bandwidth of the first CSI-RS measurement resource is large.

[0019] In a possible design based on the first aspect or the second aspect, the method further includes: the second device can send second information; and correspondingly, the first device can receive the second information. The second information is used to determine (or indicate or configure) a manner of performing CSI-RS measurement according to the first CSI-RS measurement resource.

[0020] For example, the second information can be RRC configuration information. It should be understood that the second information can be referred to as other names, such as configuration information, indication information, or resource indication information, as long as the second information has the same function, which is within the protection scope of the present application.

[0021] With this design, the first device can accurately determine the manner of performing CSI-RS measurement according to the first CSI-RS measurement resource according to the second information. In addition, in this design, the manner of performing CSI-RS measurement according to the first CSI-RS measurement resource can be determined according to the second information from the second device, so that the second device can configure the manner of performing CSI-RS measurement according to the first CSI-RS measurement resource for the first device, thereby more effectively managing the first device.

[0022] In a possible design based on the first aspect or the second aspect, the method further includes: the first device can send first capability information; and correspondingly, the second device can receive the first capability information. The first capability information is used to indicate one or more combinations of: whether the first device supports a first manner in which the first device measures a CSI-RS in a bandwidth of the first CSI-RS measurement resource; whether the first device supports a second manner in which the first device measures a CSI-RS in the first overlapping part; whether the first device supports a third manner in which the first device measures a CSI-RS in the second overlapping part; whether the first device supports measuring a CSI-RS of a candidate cell based on a physical layer measurement; whether the first device supports measuring a CSI-RS outside a bandwidth of a serving cell; or whether the first device supports measuring a CSI-RS outside a bandwidth of an active BWP of the serving cell.

[0023] With this design, the second device can accurately determine the capability of the first device according to the first capability information.

[0024] In a possible design based on the first aspect or the second aspect, in a case where the first device does not support measuring a CSI-RS outside a bandwidth of a serving cell, the first device measures a CSI-RS in the first overlapping part; and / or in a case where the first device supports measuring a CSI-RS outside the bandwidth of the serving cell, the first device measures a CSI-RS in a bandwidth of the first CSI-RS measurement resource.

[0025] In this design, whether the first device supports measuring the CSI-RS outside the bandwidth of the serving cell is associated with the way of performing the CSI-RS measurement according to the first CSI-RS measurement resource, so that the way of performing the CSI-RS measurement according to the first CSI-RS measurement resource is adapted to the capability of the first device.

[0026] Based on the first aspect or the second aspect, in a possible design, in the case that the first device does not support measuring the CSI-RS outside the bandwidth of the activated BWP of the serving cell, the first device measures the CSI-RS in the second overlapping part; and / or in the case that the first device supports measuring the CSI-RS outside the bandwidth of the activated BWP of the serving cell, the first device measures the CSI-RS in the bandwidth of the first CSI-RS measurement resource, or the first device measures the CSI-RS in the first overlapping part.

[0027] In this design, whether the first device supports measuring the CSI-RS outside the bandwidth of the activated BWP of the serving cell is associated with the way of performing the CSI-RS measurement according to the first CSI-RS measurement resource, so that the way of performing the CSI-RS measurement according to the first CSI-RS measurement resource is adapted to the capability of the first device.

[0028] Based on the first aspect or the second aspect, in a possible design, the first device performs the CSI-RS measurement according to the first CSI-RS measurement resource, including at least one of the following:

[0029] 1. If the way of performing the CSI-RS measurement according to the first CSI-RS measurement resource is to measure the CSI-RS in the first overlapping part, and the bandwidth of the first overlapping part is smaller than the first bandwidth threshold, the first device does not perform measurement on the first CSI-RS measurement resource, or the first device measures the CSI-RS in the bandwidth of the first CSI-RS measurement resource. By not performing measurement on the first CSI-RS measurement resource, unnecessary measurement operation of the first device can be avoided or reduced in the case that the bandwidth of the first overlapping part is small, and thus power consumption can be reduced. By measuring the CSI-RS in the bandwidth of the first CSI-RS measurement resource, the actual measurement bandwidth can be increased in the case that the bandwidth of the first overlapping part is small, and thus the signal quality of the candidate cell can be determined better.

[0030] 2、If the way of measuring CSI-RS according to the first CSI-RS measurement resource is: measuring the CSI-RS in the first overlapping part, and the bandwidth of the first overlapping part is 0, the first device does not measure the first CSI-RS measurement resource, or the first device measures the CSI-RS in the bandwidth of the first CSI-RS measurement resource. By not measuring the first CSI-RS measurement resource, unnecessary measurement operation of the first device can be avoided or reduced in the case that the bandwidth of the first overlapping part is 0, and thus power consumption can be reduced. By measuring the CSI-RS in the bandwidth of the first CSI-RS measurement resource, the actual measurement bandwidth can be increased in the case that the bandwidth of the first overlapping part is 0, and thus the signal quality of the candidate cell can be determined better.

[0031] 3、If the way of measuring CSI-RS according to the first CSI-RS measurement resource is: measuring the CSI-RS in the second overlapping part, and the bandwidth of the second overlapping part is less than the second bandwidth threshold, the first device can perform one of the following operations: not measuring the first CSI-RS measurement resource, measuring the CSI-RS in the bandwidth of the first CSI-RS measurement resource, or measuring the CSI-RS in the first overlapping part. By not measuring the first CSI-RS measurement resource, unnecessary measurement operation of the first device can be avoided or reduced in the case that the bandwidth of the second overlapping part is small, and thus power consumption can be reduced. By measuring the CSI-RS in the bandwidth of the first CSI-RS measurement resource or the first overlapping part, the actual measurement bandwidth can be increased in the case that the bandwidth of the second overlapping part is small, and thus the signal quality of the candidate cell can be determined better.

[0032] 4、If the way of measuring CSI-RS according to the first CSI-RS measurement resource is: measuring the CSI-RS in the second overlapping part, and the bandwidth of the second overlapping part is 0, the first device can perform one of the following operations: not measuring the first CSI-RS measurement resource, measuring the CSI-RS in the bandwidth of the first CSI-RS measurement resource, or measuring the CSI-RS in the first overlapping part. By not measuring the first CSI-RS measurement resource, unnecessary measurement operation of the first device can be avoided or reduced in the case that the bandwidth of the second overlapping part is 0, and thus power consumption can be reduced. By measuring the CSI-RS in the bandwidth of the first CSI-RS measurement resource or the first overlapping part, the actual measurement bandwidth can be increased in the case that the bandwidth of the second overlapping part is 0, and thus the signal quality of the candidate cell can be determined better.

[0033] In a possible design based on the first aspect or the second aspect, the first device performing CSI-RS measurement according to the first CSI-RS measurement resource can include: in a case where the first condition is met, the first device performing CSI-RS measurement without measurement gap according to the first CSI-RS measurement resource. The first condition can include one or more of the following in combination: the actual measurement bandwidth corresponding to the first CSI-RS measurement resource is contained in the bandwidth of the serving cell; the actual measurement bandwidth corresponding to the first CSI-RS measurement resource is contained in the bandwidth of the active BWP of the serving cell; the subcarrier spacing used by the first CSI-RS measurement resource is the same as the subcarrier spacing of the serving cell; the subcarrier spacing used by the first CSI-RS measurement resource is the same as the subcarrier spacing of the active BWP of the serving cell; the cyclic redundancy prefix used by the first CSI-RS measurement resource is the same as the cyclic redundancy prefix of the serving cell; the cyclic redundancy prefix used by the first CSI-RS measurement resource is the same as the cyclic redundancy prefix of the active BWP of the serving cell; the starting RB of the first CSI-RS measurement resource is the same as the starting RB of the bandwidth of the serving cell; the starting RB of the first CSI-RS measurement resource is the same as the starting RB of the active BWP of the serving cell; the end RB of the first CSI-RS measurement resource is the same as the end RB of the bandwidth of the serving cell; the end RB of the first CSI-RS measurement resource is the same as the end RB of the active BWP of the serving cell; the center frequency point of the first CSI-RS measurement resource is the same as the center frequency point of the bandwidth of the serving cell; the center frequency point of the first CSI-RS measurement resource is the same as the center frequency point of the active BWP of the serving cell; or the first device supports CSI-RS measurement without measurement gap.

[0034] With this design, the first device can accurately determine whether to perform CSI-RS measurement without measurement gap according to the first CSI-RS measurement resource according to the first condition. In addition, in this design, the first condition is associated with the first CSI-RS measurement resource and is not associated with CSI-RS measurement resources other than the first CSI-RS measurement resource. In this way, the first device can determine whether to perform CSI-RS measurement without measurement gap according to each CSI-RS measurement resource, which is more flexible. In addition, this design provides multiple possible implementations of the first condition, which is easy to implement and more flexible.

[0035] In a possible design based on the first aspect or the second aspect, the first information can be used to configure at least one CSI-RS measurement resource of the first candidate cell, and the at least one CSI-RS measurement resource can include the first CSI-RS measurement resource. The first device performs CSI-RS measurement without measurement gap according to the at least one CSI-RS measurement resource in a case where a second condition is met. The second condition includes one or more of the following in combination: an actual measurement bandwidth corresponding to the at least one CSI-RS measurement resource is contained in a bandwidth of the serving cell; the actual measurement bandwidth corresponding to the at least one CSI-RS measurement resource is contained in a bandwidth of an active BWP of the serving cell; a subcarrier spacing used by the at least one CSI-RS measurement resource is the same as a subcarrier spacing of the serving cell; the subcarrier spacing used by the at least one CSI-RS measurement resource is the same as a subcarrier spacing of the active BWP of the serving cell; a cyclic redundancy check (CRC) used by the at least one CSI-RS measurement resource is the same as a CRC of the serving cell; the CRC used by the at least one CSI-RS measurement resource is the same as a CRC of the active BWP of the serving cell; a starting RB of the at least one CSI-RS measurement resource is the same as a starting RB of the bandwidth of the serving cell; the starting RB of the at least one CSI-RS measurement resource is the same as a starting RB of the active BWP of the serving cell; an ending RB of the at least one CSI-RS measurement resource is the same as an ending RB of the bandwidth of the serving cell; the ending RB of the at least one CSI-RS measurement resource is the same as an ending RB of the active BWP of the serving cell; a center frequency of the at least one CSI-RS measurement resource is the same as a center frequency of the bandwidth of the serving cell; the center frequency of the at least one CSI-RS measurement resource is the same as a center frequency of the active BWP of the serving cell; or the first device supports CSI-RS measurement without measurement gap.

[0036] With this design, the first device can accurately determine whether to perform CSI-RS measurement without measurement gap according to the at least one CSI-RS measurement resource according to the second condition. In addition, in this design, the second condition is associated with the CSI-RS measurement resource of the first candidate cell, and is not associated with the CSI-RS measurement resource of a candidate cell other than the first candidate cell, so that the first device can determine whether to perform CSI-RS measurement without measurement gap according to the CSI-RS measurement resource of each candidate cell, which is more flexible. Furthermore, this design provides multiple possible implementations of the second condition, which is easy to implement and more flexible.

[0037] In a possible design based on the first aspect or the second aspect, the first information can be used to configure one or more CSI-RS measurement resources, the one or more CSI-RS measurement resources being CSI-RS measurement resources of at least one candidate cell, the at least one candidate cell including the first candidate cell, and the one or more CSI-RS measurement resources including the first CSI-RS measurement resource. The first apparatus can perform CSI-RS measurement without measurement gap according to the one or more CSI-RS measurement resources in a case that a third condition is met. The third condition includes one or more of the following in combination: an actual measurement bandwidth corresponding to the one or more CSI-RS measurement resources is contained in a bandwidth of the serving cell; the actual measurement bandwidth corresponding to the one or more CSI-RS measurement resources is contained in a bandwidth of an active BWP of the serving cell; a subcarrier spacing used by the one or more CSI-RS measurement resources is the same as a subcarrier spacing of the serving cell; the subcarrier spacing used by the one or more CSI-RS measurement resources is the same as a subcarrier spacing of the active BWP of the serving cell; a cyclic redundancy check (CRC) used by the one or more CSI-RS measurement resources is the same as a CRC of the serving cell; the CRC used by the one or more CSI-RS measurement resources is the same as a CRC of the active BWP of the serving cell; a starting RB of the one or more CSI-RS measurement resources is the same as a starting RB of the bandwidth of the serving cell; the starting RB of the one or more CSI-RS measurement resources is the same as a starting RB of the active BWP of the serving cell; an ending RB of the one or more CSI-RS measurement resources is the same as an ending RB of the bandwidth of the serving cell; the ending RB of the one or more CSI-RS measurement resources is the same as an ending RB of the active BWP of the serving cell; a center frequency of the one or more CSI-RS measurement resources is the same as a center frequency of the bandwidth of the serving cell; the center frequency of the one or more CSI-RS measurement resources is the same as a center frequency of the active BWP of the serving cell; or the first apparatus supports CSI-RS measurement without measurement gap.

[0038] With this design, the first apparatus can accurately determine whether to perform CSI-RS measurement without measurement gap according to the one or more CSI-RS measurement resources based on the third condition. In addition, in this design, the third condition is associated with the one or more CSI-RS measurement resources, and thus the first apparatus can uniformly determine whether to perform CSI-RS measurement without measurement gap according to the one or more CSI-RS measurement resources, thereby reducing complexity. Furthermore, this design provides multiple possible implementation manners of the third condition, and is easy to implement and flexible.

[0039] In a possible design based on the first aspect or the second aspect, the method further includes: the first device can send second capability information; and correspondingly, the second device can receive the second capability information. The second capability information is used to indicate whether the first device supports CSI-RS measurement without measurement gap. By this design, the second device can accurately determine whether the first device supports CSI-RS measurement without measurement gap according to the second capability information.

[0040] In a possible design based on the first aspect, the method further includes: the first device can send a measurement result, which is obtained by performing CSI-RS measurement according to the first CSI-RS measurement resource. By this design, the second device can accurately determine the measurement result.

[0041] In a third aspect, this application provides a communication device. In some examples, the communication device can be a terminal, or can be a device (for example, a module, a communication module, a circuit or a chip responsible for communication function (such as a modem chip, or a SoC chip or a SIP chip containing a modem core), a chip system or a processor) in the terminal, or can be a logic node, a logic module or software capable of realizing all or part of the terminal function. The communication device has the function of realizing the first aspect. In other examples, the communication device can be an access network device, or can be a device (for example, a module, a communication module, a circuit or a chip responsible for communication function (such as a modem chip, or a SoC chip or a SIP chip containing a modem core), a chip system or a processor) in the access network device, or can be a logic node, a logic module or software capable of realizing all or part of the access network device function. The communication device has the function of realizing the second aspect.

[0042] In a possible design, the communication device includes a module or a unit or a means corresponding to the operations in the first aspect or the second aspect. The module or the unit or the means can be implemented by software, or by hardware, or by a combination of software and hardware. For example, the communication device includes an interface unit and a processing unit. The interface unit can be used to transceive signals to realize the communication between the communication device and other devices; the processing unit can be used to perform some internal operations of the communication device. The functions performed by the processing unit and the interface unit can correspond to the operations in the first aspect or the second aspect.

[0043] In a possible design, the communication device includes a processor. The processor can execute computer programs or instructions, for example, computer programs or instructions in a memory. When the computer programs or instructions are executed, the communication device performs the method in any possible design of the first aspect or the second aspect.

[0044] Optionally, the processor is coupled with the memory through an interface, and the memory is a built-in memory of the communication device or an external memory connected with the communication device.

[0045] In a possible design of the first aspect or the second aspect, the communication device includes a processor and an interface circuit, where the processor is configured to communicate with other devices through the interface circuit, and perform the method in any possible design of the first aspect or the second aspect.

[0046] In a fourth aspect, a communication system is provided, which can include a first device and a second device. The first device can perform the communication method provided in the first aspect, and the second device can perform the communication method provided in the second aspect.

[0047] In some possible designs, the first device is a terminal, and the second device is an access network device.

[0048] In a fifth aspect, a computer readable storage medium is provided, which stores a computer program or instructions, and when the computer program or instructions are executed, the method in any possible design of the first aspect or the second aspect is implemented.

[0049] In a sixth aspect, a computer program product is provided, which includes computer program code, and when the computer program code is run, the method in any possible design of the first aspect or the second aspect is implemented.

[0050] In a seventh aspect, a chip is provided, which can include at least one processor, and the chip is configured to execute computer programs or instructions in a memory to implement the method in any possible design of the first aspect or the second aspect.

[0051] The technical effects that can be achieved by the first aspect or the second aspect or any possible design of the third aspect to the seventh aspect can be described with reference to the technical effects that can be achieved by the first aspect or the second aspect or any possible design of the third aspect to the seventh aspect, and the repeated parts will not be described. BRIEF DESCRIPTION OF DRAWINGS

[0052] FIGS. 1A and 1B are architecture diagrams of several communication systems provided by embodiments of the present application;

[0053] FIG. 1C is an architecture diagram of an open radio access network (O-RAN or ORAN) device provided by an embodiment of the present application;

[0054] FIG. 2 is a flowchart of a downlink beam management method provided by an embodiment of the present application;

[0055] FIG. 3 is a schematic diagram of an application scenario provided by an embodiment of the present application;

[0056] FIG. 4 is a flowchart of a communication method according to an embodiment of the present application;

[0057] FIG. 5 is a schematic diagram of a bandwidth of a measurement resource, a bandwidth of a serving cell, and a bandwidth of an active BWP of the serving cell according to an embodiment of the present application;

[0058] FIGS. 6 to 9 are structural diagrams of several communication apparatuses according to embodiments of the present application. DETAILED DESCRIPTION

[0059] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings. The technical solutions in the embodiments of the present application can be applied to various communication systems, such as a wireless local area network (WLAN), a wireless fidelity (Wi-Fi or WiFi) system, a 4th generation (4G) mobile communication system (such as a long term evolution (LTE) system), a 5th generation (5G) mobile communication system (such as a new radio (NR) system), or a future communication system. The method provided by the embodiments of the present application can be applied to a terrestrial network communication system or a non-terrestrial network (NTN) communication system. The NTN communication system may, for example, be a satellite communication system, or may include a drone, a high altitude platform station (HAPS), and other aerial access network devices, which are not limited in the present application.

[0060] The various aspects, embodiments or features presented can be presented with respect to a system that can include one or more devices, components, modules, etc. It is appreciated that each system can include additional devices, components, modules, etc. and / or can not include all of the devices, components, modules etc. discussed in connection with the figures. Additionally, a combination of these approaches can be used.

[0061] FIG. 1A shows a possible, non-limiting, schematic diagram of a system. As shown in FIG. 1A, the communication system 10 includes a radio access network (RAN) 100 and a core network (CN) 200. Optionally, the communication system 10 can also include an Internet 300.

[0062] The RAN 100 includes at least one RAN node (e.g., 110a and 110b in FIG. 1A, collectively referred to as 110) and at least one terminal (e.g., 120a-120j in FIG. 1A, collectively referred to as 120). Other RAN nodes, such as wireless relay devices and / or wireless backhaul devices (not shown in FIG. 1A), etc., can also be included in the RAN 100. The terminals 120 are wirelessly connected to the RAN nodes 110. The RAN nodes 110 are connected to the core network 200 through wireless or wired means. The core network devices in the core network 200 and the RAN nodes 110 in the RAN 100 can be different physical devices, respectively, or can be the same physical device integrated with the logical functions of the core network and the logical functions of the wireless access network.

[0063] The RAN 100 can be a 3rd generation partnership project (3GPP) related cellular system, such as a 4G, 5G mobile communication system, or a future evolution system. The RAN 100 can also be an ORAN, a cloud radio access network (CRAN), or a WiFi system. The RAN 100 can also be a communication system that integrates two or more of the above systems.

[0064] The RAN nodes 110, which can also be referred to as RAN entities or access nodes, etc., form part of the communication system and help terminals to access wirelessly. The RAN nodes 110 in the communication system 10 can be of the same type or of different types. In some scenarios, the roles of the RAN nodes 110 and the terminals 120 are relative, e.g., the network element 120i in FIG. 1A can be a helicopter or a drone, which can be configured as a mobile base station. For a terminal 120j that accesses the RAN 100 through the network element 120i, the network element 120i is a base station; but for the base station 110a, the network element 120i is a terminal. The RAN nodes 110 and the terminals 120 are sometimes referred to as communication apparatuses, e.g., the network elements 110a and 110b in FIG. 1A can be understood as communication apparatuses with base station functions, and the network elements 120a-120j can be understood as communication apparatuses with terminal functions.

[0065] The RAN nodes can also be referred to as access network devices. In the following, the access network devices are used for description, unless specifically stated otherwise.

[0066] The access network device can be a device or module with corresponding communication functions located at the network side of the above communication system. The access network device is usually provided with a communication module, circuit or chip for performing corresponding communication functions. The access network device is also configured with programs or instructions for performing corresponding communication functions and corresponding programs or instructions.

[0067] In a possible scenario, the access network device can be a base station (BS), an evolved NodeB (eNodeB), a transmission point (TP), an access point (AP), a transmission reception point (TRP), a mobile switching center, a next generation NodeB (gNB), a next generation NodeB in a future communication system, or an access node in a WiFi system, etc. The access network device can be a macro base station (such as 110a in FIG. 1A), a micro base station or an indoor station (such as 110b in FIG. 1A), a relay node or a donor node, a wireless controller in a CRAN scenario, a satellite, a drone, a balloon or an airplane, etc. Optionally, the access network device can also be a server, a wearable device, a vehicle or a vehicle-mounted device, etc. For example, the access network device in vehicle to everything (V2X) technology can be a road side unit (RSU). All or part of the functions of the access network device in this application can also be implemented by software functions running on hardware, or by virtualized functions instantiated on a platform (such as a cloud platform).

[0068] In another possible scenario, a terminal is assisted by multiple access network devices to implement wireless access, and different access network devices respectively implement part of functions of a base station. For example, an access network device can be a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), etc. The CU and the DU can be separately arranged, or can be included in the same network element, for example, in a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, for example, in a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).

[0069] In different systems, the CU (or CU-CP and CU-UP), the DU, or the RU can also have different names, but a person skilled in the art can understand their meanings. For example, in an ORAN system, the CU can also be referred to as an open CU (O-CU), the DU can also be referred to as an open DU (O-DU), the CU-CP can also be referred to as an open CU-CP (O-CU-CP), the CU-UP can also be referred to as an open CU-UP (O-CU-UP), and the RU can also be referred to as an open RU (O-RU). Any of the CU (or CU-CP, CU-UP), the DU, and the RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0070] A terminal can be a device or module with corresponding communication functions and can access the above-mentioned communication system. The terminal can also be referred to as a terminal device, a user equipment (UE), a mobile station, a mobile terminal, a wireless terminal device, a subscriber unit, a subscriber station, a mobile station, a remote station, a user terminal device, a user agent, or a user device, etc. The terminal is usually provided with a communication module, circuit or chip for performing corresponding communication functions. The terminal can also be configured with programs or instructions for performing corresponding communication functions.

[0071] The terminal can be widely used in various scenarios, such as device-to-device (D2D) communication, V2X communication, machine-type communication (MTC), internet of things (IOT), virtual reality, augmented reality, industrial control, autonomous driving, remote medical treatment, smart power grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc. The terminal can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a wearable device, a vehicle, a drone, a helicopter, an airplane, a ship, a robot, a mechanical arm, a smart home device, etc. The wearable device can also be referred to as a wearable smart device or a smart wearable device, etc., which is a general term for devices that are designed and developed by applying wearable technology to daily wear. The terminal applied to a vehicle can be referred to as a vehicle-mounted terminal device, such as a transport vehicle, a communication module or an on-board unit (OBU) with wireless communication function.

[0072] By way of example, a terminal can include a mobile phone (also referred to as a "cellular" phone), a computer with mobile termination, or a portable, pocket, handheld, computer-embedded mobile device, etc. For example, a terminal can be a device of personal communication service (PCS) phone, a cordless phone, a session initiation protocol phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), etc. A terminal can also include a limited device, such as a device with limited power consumption, or a device with limited storage capability, or a device with limited computing capability, etc. For example, a terminal can be an information sensing device of bar code, radio frequency identification (RFID), sensor, global positioning system (GPS), or laser scanner, etc. Embodiments of the present application do not limit the device form of a terminal.

[0073] In this application, the core network device refers to a device in the core network that provides service support for the terminal. For example, in the case of CN 200 as the core network in the future communication system, or the 5G core network, or the evolved 5G core network, some examples of core network devices are: access and mobility management function (AMF) entity, session management function (SMF) entity, user plane function (UPF) entity, policy control function (PCF) entity, etc., which are not listed one by one here. Among them, the AMF entity can be responsible for access management and mobility management of the terminal; the SMF entity can be responsible for session management, such as session establishment of a user, etc.; the UPF entity can be a functional entity of the user plane, mainly responsible for connecting external networks. For another example, in the case of CN 200 as a 4G core network, some examples of core network devices are: mobility management entity (MME) entity, home subscriber server (HSS) entity, serving gateway (S-GW) entity, policy and charging rules function (PCRF) entity, public data network gateway (PDN gateway, P-GW) entity, etc., which are not listed one by one here. It should be noted that the entity in this application can also be referred to as a network element or a functional entity, for example, the AMF entity can also be referred to as an AMF network element or an AMF functional entity, for another example, the SMF entity can also be referred to as an SMF network element or an SMF functional entity, etc. The above core network devices can work independently, or can be combined together to realize certain control functions, such as: AMF, SMF and PCF can be combined together as a core network device.

[0074] FIG. 1B illustrates an example of an ORAN system architecture diagram. The ORAN system in embodiments of the present application can include other components than those shown in FIG. 1B. As shown in FIG. 1B, an access network device can communicate with a CN through a backhaul link and communicate with a terminal through an air interface. For example, a BBU in an access network device communicates with a core network through a backhaul link, and an RU in the access network device communicates with at least one terminal through an air interface. The BBU communicates with at least one RU through a front-haul link, and the BBU and the RU can be co-located or not co-located. The BBU includes at least one CU and at least one DU, which can communicate through at least one mid-haul link.

[0075] FIG. 1C illustrates an example of a network element function division and protocol layer structure diagram of an ORAN device.

[0076] In some possible implementations, the CU is a logical node that carries the RRC layer, the service data adaptation protocol (SDAP) layer, the packet data convergence protocol (PDCP) layer, and other control functions of the access network device. The CU can be connected to a network node such as a core network through some interfaces (e.g., an E2 interface, etc.). Optionally, the CU can have part of the functions of the core network. The CU (e.g., the PDCP layer and higher layers of the CU) is connected to the DU (e.g., the radio link control (RLC) layer and lower layers of the DU) through some interfaces (e.g., an F1 interface, etc.). For example, the F1 interface can provide control plane (C-Plane) and user plane (U-Plane) functions (e.g., interface management, system information management, UE context management, RRC message transmission, etc.). The F1AP is an application protocol of the F1 interface, which defines the signaling procedures of the F1 in some examples. The F1 interface supports the F1 control plane (F1-C) and the F1 user plane (F1-U).

[0077] In some examples, a CU can include a CU-CP and a CU-UP. Wherein the CU-CP is a logical node carrying a control plane part of PDCP (PDCP-C) layer of RRC layer and packet data convergence protocol layer, used to implement the control plane function of the CU. The CU-CP can interact with a network element in the core network for implementing the control plane function. The network element in the core network for implementing the control plane function can be an access and mobility function network element, such as AMF in the 5G system. The CU-UP is a logical node carrying a user plane part of PDCP (PDCP-U) layer of SDAP layer and packet data convergence protocol layer, used to implement the user plane function of the CU. The CU-UP can interact with a network element in the core network for implementing the user plane function. The network element in the core network for implementing the user plane function is, for example, the UPF in the 5G system.

[0078] In some possible implementations, the DU is a logical node carrying an RLC layer, a medium access control (MAC) layer, a higher physical (Higher PHY) layer and other functions. In some examples, the DU can control at least one RU. The DU is connected to the RU through some interfaces (for example, a front-haul interface). In some examples, the Higher PHY layer includes part of physical layer (PHY) processing, such as forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, and other processing functions.

[0079] The above configuration of the CU and the DU is only an example, and the functions of the CU and / or the DU can be configured as needed. For example, the CU or the DU can be configured to have more functions of protocol layers, or the CU or the DU can be configured to have partial processing functions of protocol layers. For example, part of the functions of the RLC layer and the functions of the protocol layers above the RLC layer are arranged in the CU, and the remaining functions of the RLC layer and the functions of the protocol layers below the RLC layer are arranged in the DU. For another example, the functions of the CU or the DU can be divided according to the type of service or other system requirements, for example, according to delay. The functions that need to meet the requirement of shorter delay in processing time are arranged in the DU, and the functions that do not need to meet the requirement of shorter delay are arranged in the CU.

[0080] In some possible implementations, the RU is a logical node that hosts lower physical (Lower PHY) layer and radio frequency (RF) processing. In some examples, the RU can be a 3GPP TRP or RRH or other similar functional entity. In some examples, the Low-PHY includes portions of PHY processing such as fast Fourier transformation (FFT), inverse fast Fourier transformation (IFFT), digital beamforming and filtering, and other processing functions. The RU communicates with one or more terminals over a wireless link.

[0081] The DU and the RU can or can not be co-located. The DU and the RU exchange control plane and user plane information over a fronthaul link via a lower-layer split-control, user and synchronization (Lower-Layer Split CUS-Plane, LLS-CUS or LLS-C / U / S) interface. The LLS-CUS can include a lower-layer split-control plane (LLS-C) interface and a lower-layer split-user plane (LLS-U) interface that provide control plane (C-Plane) and user plane (U-Plane), respectively. In some examples, the control plane refers to real-time control between the DU and the RU. The DU and the RU exchange management information over a lower-layer split management (LLS-M) interface of the fronthaul link. The management plane (M-Plane) refers to non-real-time management operations between the DU and the RU.

[0082] The DU and the RU can cooperate to collectively implement the functionality of the PHY layer. One DU can be connected to one or more RUs. The functionalities that the DU and the RU have can be configured in multiple ways according to design. For example, the DU is configured to implement baseband functionality and the RU is configured to implement mid- RF functionality. As another example, the DU is configured to implement high-layer functionality in the PHY layer and the RU is configured to implement low-layer functionality in the PHY layer or to implement the low-layer functionality and RF functionality. The high-layer functionality in the PHY layer can include a portion of the functionality of the PHY layer that is closer to the MAC layer, and the low-layer functionality in the PHY layer can include another portion of the functionality of the PHY layer that is closer to the mid-RF side.

[0083] The communication system and service scenarios described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art can know that, with the evolution of network architecture and the appearance of new service scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0084] The related terms involved in the embodiments of the present application are explained below. It should be noted that these explanations are to make the embodiments of the present application easier to understand, and should not be regarded as a limitation on the scope of protection required by the present application.

[0085] 1、beam (beam):

[0086] A mobile communication system (for example, a 5G mobile communication system) can use high-frequency communication, that is, use high-frequency signals to transmit data. One major problem of high-frequency communication is that the signal energy sharply decreases with the transmission distance, resulting in a short signal transmission distance. In order to overcome this problem, high-frequency communication uses analog beam technology, which concentrates signal energy in a small angular range by weighting processing on the antenna array, forming a signal similar to a light beam (called an analog beam, simply referred to as a beam), thereby improving the transmission distance. Both the access network device and the terminal can use beams for transmission.

[0087] A beam can be referred to as a spatial domain filter, a spatial filter, a spatial domain parameter, a spatial parameter, a spatial domain setting, a spatial setting, Quasi-colocation (QCL) information, a QCL assumption, or a QCL indication, etc. in a protocol (e.g., an NR protocol). A beam can also be represented by a transmission configuration indicator state parameter, or by a spatial relation parameter. Among them, the English of the transmission configuration indicator state can be transmission configuration indicator state (TCI-state), transmission configuration indication state (TCI-state), or transmission configuration index state (TCI-state), etc. Therefore, in this application, the beam can be replaced by the spatial domain filter, the spatial filter, the spatial domain parameter, the spatial parameter, the spatial domain setting, the spatial setting, the QCL information, the QCL assumption, the QCL indication, the TCI-state (e.g., the downlink TCI-state (DL TCI-state), and / or the uplink TCI-state (UL TCI-state)), or the spatial relation, etc. The above terms are also equivalent to each other. The beam can also be replaced by other terms representing the beam, which is not limited in this application.

[0088] A beam for transmitting a signal can be referred to as a transmission beam (Tx beam), a spatial domain transmission filter, a spatial transmission filter, a spatial domain transmission parameter, a spatial transmission parameter, a spatial domain transmission setting, or a spatial transmission setting.

[0089] For uplink communication, a transmission beam can also be referred to as an uplink transmission beam. Exemplarily, an uplink transmission beam can be indicated by any one of a spatial relation, an uplink TCI-state, or a sounding reference signal (SRS) resource (indicating the transmission beam using the SRS). An uplink transmission beam can also be replaced by an SRS resource.

[0090] For downlink communication, a transmission beam can also be referred to as a downlink transmission beam. Exemplarily, a downlink transmission beam can be indicated by any one of a spatial relation, a CSI-RS measurement resource, a downlink TCI-state, a synchronization signal block (SSB) resource, or a tracking reference signal (TRS) resource. In this application, a CSI-RS measurement resource can be replaced by at least one of a CSI-RS resource, or a measurement CSI-RS resource. The full name of SSB in English and Chinese can also be a synchronization signal and physical broadcast channel (PBCH) block (synchronization signal and PBCH block).

[0091] A beam for receiving a signal can be referred to as a reception beam (Rx beam), a spatial domain reception filter, a spatial reception filter, a spatial domain reception parameter, a spatial reception parameter, a spatial domain reception setting, or a spatial reception setting.

[0092] A transmission beam can refer to the distribution of signal strength in different directions in space after a signal is transmitted by an antenna, and a reception beam can refer to the distribution of signal strength in different directions in space of a wireless signal received by an antenna.

[0093] In addition, the beam can be a wide beam, or a narrow beam, or other types of beams. The technology for forming the beam can be a beamforming technology or other technology. The beamforming technology can be, for example, a digital beamforming technology, an analog beamforming technology, or a hybrid digital / analog beamforming technology, and the like.

[0094] The beam generally corresponds to a resource. For example, when performing beam measurement, the access network device measures different beams through different resources, and the terminal feeds back the measured resource quality, so that the access network device knows the quality of the corresponding beam. When data transmission, the beam information is also indicated through its corresponding resource. For example, the access network device indicates the physical downlink shared channel (PDSCH) beam information of the terminal through the transmission configuration indication field in the DCI. The English of the transmission configuration indication can be transmission configuration indicator (TCI), transmission configuration indication (TCI), or transmission configuration index (TCI), and the like.

[0095] Optionally, multiple beams with the same or similar communication characteristics can be regarded as one beam. One beam can include one or more antenna ports for transmitting data channels, control channels, and sounding signals, and the like. One or more antenna ports forming a beam can also be regarded as an antenna port set.

[0096] In the embodiments of the present application, if no special description is made, the beam refers to the sending beam of the access network device. In beam measurement, each beam of the access network device corresponds to a resource, so the beam corresponding to the resource can be uniquely identified by the index of the resource.

[0097] 2. Resource:

[0098] In the present application, there is an association relationship between the resource and the beam, so the resource can be used to implicitly describe the beam. For example, in beam measurement, there is an association relationship between the beam and the resource. The access network device sending the signal through the resource corresponding to the beam can be equivalent to at least one of the following: the access network device sending the signal through the resource corresponding to the beam, or the access network device sending the signal through the beam corresponding to the resource. The terminal measuring the quality of the resource can be equivalent to at least one of the following: the terminal measuring the quality of the beam corresponding to the resource, the terminal measuring the quality of the signal transmitted on the resource, or the terminal measuring the quality of the signal transmitted on the beam corresponding to the resource.

[0099] The resource can be an uplink signal resource and / or a downlink signal resource. The uplink signal includes, but is not limited to, at least one of the following: an SRS, or an uplink demodulation reference signal (DMRS). The downlink signal includes, but is not limited to, at least one of the following: a CSI-RS, a cell specific reference signal (CS-RS), a user equipment specific reference signal (US-RS), a downlink DMRS, or an SSB.

[0100] The resource can be configured by RRC signaling. In terms of configuration structure, one resource is a data structure including one or more of the following related parameters of the corresponding uplink / downlink signal: type of the uplink / downlink signal, resource element (RE) carrying the uplink / downlink signal, transmission time and period of the uplink / downlink signal, and number of ports used for transmitting the uplink / downlink signal. Each resource of the uplink / downlink signal has a unique index to identify the resource of the uplink / downlink signal. It can be understood that the index of the resource can also be referred to as the identifier of the resource, which is not limited in the present application.

[0101] 3. Beam management

[0102] Beam management is a measurement procedure in a protocol (for example, a release 15 (R15) protocol), which can include downlink beam management and uplink beam management. The downlink beam management method is described below.

[0103] As shown in FIG. 2, the downlink beam management method can include the following steps.

[0104] S201: The access network device sends measurement configuration information to the terminal.

[0105] The measurement configuration information can be carried in the RRC signaling sent by the access network device to the terminal.

[0106] Optionally, the measurement configuration information includes resource configuration information and reporting configuration information. The resource configuration information is measurement resource related information, which can be used to configure measurement resources. In the protocol, the measurement resources can be configured through a three-level structure, which is resource configuration (resourceConfig or resourceSetting), resource set (resourceSet) and resource (resource) respectively. For example, the access network device can configure one or more resource configurations for the terminal, each resource configuration includes one or more resource sets, and each resource set can include one or more resources. Each resource configuration / resource set / resource includes its own index. In addition, each resource configuration / resource set / resource also includes other parameters, such as the period of the resource, the signal type corresponding to the resource, etc. The reporting configuration information refers to the measurement result reporting related information, which can be configured through the reporting configuration (ReportConfig) in the protocol. The access network device can configure one or more reporting configurations for the terminal, each reporting configuration includes reporting indicators, reporting time and period, reporting format and other reporting related information. In addition, the reporting configuration also includes the index of the resource configuration, which is used to indicate which or which measurement resource is used to measure the reporting result.

[0107] For ease of understanding, the following shows an example of resource configuration information and reporting configuration information in the R15 protocol.

[0108] The example of resource configuration information in the R15 protocol is as follows:

[0109] The explanations of some parameters in this example are as follows:

[0110] CSI-ResourceConfig is the resource configuration of channel state information (CSI). One resource configuration includes one or more resource sets, and one resource set includes one or more resources.

[0111] csi-ResourceConfigId is the index of the CSI resource configuration.

[0112] csi-RS-ResourceSetList is the list of CSI-RS resource sets, which can be the list of nzp-CSI-RS-SSB (or non-zero-power (NZP) CSI-RS-SSB) resource sets, or the list of csi-IM (or channel state information-interference measurement (CSI-IM)) resource sets.

[0113] nzp-CSI-RS-SSB-ResourceSetList is a list of nzp-CSI-RS-SSB resource sets, which can include one or more nzp-CSI-RS (or NZP CSI-RS) resource sets or one or more csi-SSB (or CSI-SSB) resource sets, or one or more nzp-CSI-RS resource sets and one or more csi-SSB resource sets.

[0114] csi-IM-ResourceSetList is a list of csi-IM resource sets, which can include one or more csi-IM resource sets.

[0115] bwp-Id is the identifier of a BWP. The frequency of a cell is divided into multiple BWPs, and bwp-id is used to indicate a BWP.

[0116] resourceType is the resource type, which can be used to indicate the time-domain transmission characteristics of the resources in the resource configuration, such as whether it is periodically transmitted, semi-persistently transmitted, or aperiodically transmitted.

[0117] It should be understood that the examples of the resource configuration information are only illustrative. In actual applications, one resource set can include one or more resources, one nzp-CSI-RS resource set can include one or more nzp-CSI-RS resources, one csi-SSB resource set can include one or more SSB resources, and one csi-IM resource set can include one or more csi-IM resources. Since there are many types of resource sets, they will not be expanded one by one here.

[0118] An example of reporting configuration information in the R15 protocol is as follows:

[0119] The explanations of some parameters in this example are as follows:

[0120] CSI-ReportConfig is the CSI reporting configuration.

[0121] reportConfigId is the index of the reporting configuration.

[0122] resourcesForChannelMeasurement is the identifier of the resource configuration for measuring channel information.

[0123] csi-IM-ResourcesForInterference is the identifier of the resource configuration for measuring interference information, and the resource type included in the resource configuration is csi-IM.

[0124] nzp-CSI-RS-ResourcesForInterference is an identifier of a resource configuration for measuring interference information, and the resource types included in the resource configuration are all nzp-CSI-RS.

[0125] reportQuantity is a reported parameter, which can include, for example, a reference signal received power (RSRP) and / or a channel quality indicator (CQI).

[0126] groupBasedBeamReporting can be a grouping-based reporting criterion, which can be configured as enabled or disabled. When configured as enabled, the access network device can not configure other details, and the terminal can report a CSI-RS resource indicator (CRI) and / or an SSB resource indicator (SSBRI), which can be received simultaneously. When configured as disabled, the access network device further configures the number of reported beams, which can be configured as one of 1 to 4. For example, when the number of reported beams configured is 4, the terminal can report 4 resource identifiers, which do not require to be received simultaneously; or the 4 resource identifiers can not be received simultaneously.

[0127] S202: The access network device transmits a downlink signal on a resource corresponding to a resource configuration in the resource configuration information.

[0128] S203: The terminal measures the downlink signal according to the measurement configuration information.

[0129] For example, the terminal can measure the downlink signal according to the resource configuration in the measurement configuration information, to determine the quality of each resource.

[0130] S204: The terminal transmits a beam measurement report to the access network device.

[0131] The beam measurement report can include, but is not limited to, one or more combinations of the following: an index of one or more resources, quality of the resource, etc. Table 1 is the format of the beam measurement report in the R15 protocol. The CRI field and the SSBRI field can be used to indicate the resource index to be reported. The terminal can report CRI or SSBRI, or CRI and SSBRI. and Lengths of the CRI field and the SSBRI field, respectively. RSRP is the quality of the resource. The reporting of RSRP can adopt a differential reporting criterion. For example, the RSRP of the best resource can be reported by the RSRP field in Table 1 with 7-bit quantization, and other RSRPs can be reported by the differential RSRP field in Table 1 with 4-bit quantization.

[0132] Optionally, the beam measurement report can be carried in a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH).

[0133] Table 1

[0134] 4. Cell handover:

[0135] In a cellular network, a terminal can communicate with an access network device based on a cell. Each cell can correspond to an access network device, and include the transmission resource (such as time-frequency resource) and transmission parameter (such as one or more of the combination of bandwidth, subcarrier spacing, or waveform, etc.) corresponding to the access network device. The terminal is located in the coverage of which access network device, it can be based on the transmission resource and transmission parameter of the cell corresponding to the access network device for transmission. As the terminal moves, the terminal can move from the coverage of one cell to the coverage of another cell (as shown in FIG. 3), at this time, the terminal can be based on the transmission resource and transmission parameter of another cell for transmission. The process of the terminal replacing the cell used for transmission can be referred to as cell handover. Through this process, the terminal can be handed over from one cell to another cell.

[0136] 5. Cell measurement:

[0137] Before performing cell switching, the terminal needs to perform cell measurement. Through cell measurement, the terminal can obtain the signal quality of the current serving cell and the candidate cell, which can be used to determine whether to switch the terminal to the candidate cell. For example, as shown in FIG. 3, the terminal transmits through cell 1. The access network device corresponding to cell 1 can send RRC configuration information to the terminal, which can configure the terminal to perform cell measurement. The configuration information includes the reference signal measurement resource of the serving cell (i.e., cell 1) and the reference signal measurement resource of the candidate cell (e.g., cell 2). The terminal measures the reference signal measurement resource of the serving cell and the candidate cell, thereby determining the signal quality of the serving cell and the candidate cell. When the terminal finds that the signal quality of a certain candidate cell is stronger than that of the current serving cell, and the terminal is already located in the coverage of the candidate cell, the terminal can initiate a cell switching process. The specific process of cell switching is not limited.

[0138] The reference signal measurement resource can also be referred to as a measurement reference signal resource, a reference signal resource, or a measurement resource, and the like, without limitation. The reference signal measurement resource can be an information element (IE) in the RRC configuration information, containing a related parameter of a measurement reference signal, that is, all parameters related to a measurement reference signal in the RRC configuration information can be encapsulated in an information element, which is referred to as a reference signal measurement resource. It should be understood that the reference signal measurement resource is not a time-frequency resource.

[0139] Currently, when performing cell measurement, a terminal can measure SSBs of a serving cell and candidate cells. Specifically, an access network device can configure SSB resources of the serving cell and SSB resources of K candidate cells in one resource set, where K is an integer greater than or equal to 1, and the specific configuration manner can refer to S201. The terminal measures the SSB resources in the resource set to obtain the signal quality of all SSB resources in the K+1 cells, and reports the measurement results for L cells in the K+1 cells, where L is a positive integer. Table 2 shows one possible example of the measurement results reported by the terminal. As shown in Table 2, for each of the L cells, the terminal can report the indexes (or identities, IDs) and RSRPs of M SSB resources, and a total of L*M indexes and RSRPs of SSB resources corresponding to the L cells are reported, where M is a positive integer. Optionally, the L cells can be the L cells with the best signal quality in the K+1 cells. The access network device can determine whether to send cell switching signaling to instruct the terminal to switch to a certain candidate cell according to the measurement results reported by the terminal. For example, if the measurement results reported by the terminal indicate that the maximum SSB signal quality (for example, RSRP) of a certain candidate cell is greater than the maximum SSB signal quality (for example, RSRP) of the current serving cell, the access network device can send cell switching signaling to instruct the terminal to switch to the candidate cell.

[0140] Table 2

[0141] In this application, the candidate cell can also be referred to as a candidate cell, a neighbor cell, a neighbor cell, or a target cell, without limitation.

[0142] 6. Measurement gap (MG):

[0143] The 3GPP proposes MG, that is, a part of time is reserved, and in this time, the terminal can measure the signal of the candidate cell, but will not send and receive data. The MG can be a periodic time period, and the period is, for example, 20 milliseconds (ms), 40 ms, 80 ms, or 160 ms. Optionally, the MG can be applicable to inter-frequency measurement. Inter-frequency measurement refers to that the cell where the terminal is currently located and the candidate cell are not on the same carrier frequency.

[0144] 7. In this application, “indicate” or “for indicating” can include explicit indication (or direct indication) and implicit indication (or indirect indication). When describing that a certain information is for indicating A, it can include that the information explicitly indicates A or implicitly indicates A, and does not mean that A must be carried in the information.

[0145] The indication manner involved in the embodiments of the present application should be understood as covering various methods that can enable the to-be-indicated party to know the to-be-indicated information. The to-be-indicated information can be sent as a whole, or can be sent separately into multiple sub-information, and the sending period and / or sending occasion of the sub-information can be the same or different, which is not limited.

[0146] The "information" in the embodiments of the present application can be explicitly indicated, i.e., directly indicated through signaling, or obtained according to the indicated parameters, in combination with other rules or other parameters or through derivation. Or it can be implicitly indicated, i.e., obtained according to rules or relationships, or according to other parameters, or through derivation. It is not limited.

[0147] 8、In the present application, the communication between different devices can mean direct communication between different devices (i.e., without the need for other devices to transfer or forward), or can mean communication between different devices through other devices (i.e., with the need for other devices to transfer or forward), or can mean that a functional unit inside a device communicates with other devices through another functional unit. For example, "sending information to a terminal" can be understood as that the destination of the information is the terminal, which can include direct or indirect sending of information to the terminal. "Receiving information from a terminal" can be understood as that the source of the information is the terminal, which can include direct or indirect receiving of information from the terminal. The information can be processed between the source and the destination of the information sending, such as format conversion, digital-to-analog conversion, amplification, filtering, etc., but the destination can understand the valid information from the source. Similar expressions in the present application can be understood similarly, which will not be repeated here.

[0148] 9、In the present application, the words "exemplarily", "such as", "for example" and "an example of" are used to represent examples, illustrations or descriptions, and are not used to limit the protection scope of the present application. It should be understood that the examples in the present application can also be implemented in other ways.

[0149] 10、In the present application, any two of programs, instructions and codes can be replaced with each other.

[0150] 11、In the present application, less than and less than or equal to can be replaced with each other; greater than and greater than or equal to can be replaced with each other.

[0151] 12、In the present application, "in the case of", "when", "if, then", and "if, then" can represent the same meaning and can be replaced with each other.

[0152] 13、Serving cell:

[0153] In this application, the serving cell can be a serving cell in a dual connectivity (DC) mode. It should be understood that the serving cell can also be a serving cell in other modes, without limitation.

[0154] For ease of understanding, the following first introduces a cell group and a cell in the DC mode.

[0155] Master cell group (MCG): a group of serving cells associated with a master access network device, which can include a PCell and one or more SCells, for example, can be composed of a PCell and one or more SCells. The PCell and one or more SCells in the MCG can be jointly together through a carrier aggregation (CA) technology.

[0156] Secondary cell group (SCG): a group of serving cells associated with a secondary access network device, which can include a PSCell and one or more SCells, for example, can be composed of a primary secondary cell (PSCell) and one or more SCells. The PSCell and one or more SCells in the SCG can also be jointly together through a CA technology.

[0157] PCell: belongs to the MCG, is a cell in the MCG used to initiate initial access, or in other words, the terminal can use the PCell to initiate initial access in the MCG.

[0158] PSCell: belongs to the SCG, is a cell in the SCG used to initiate initial access, or in other words, the terminal can use the PSCell to initiate initial access in the SCG.

[0159] SCell: belongs to the MCG or the SCG. The terminal can be configured with one or more SCells in the DC mode.

[0160] Generally speaking, signaling can be transmitted through the PCell and the PSCell, therefore, the PCell and the PSCell can be referred to as sPCell; in other words, the sPCell can include the PCell and the PSCell.

[0161] Optionally, in the DC mode, the serving cell can include one or more combinations of the following: PCell, PSCell, sPCell, or SCell. For example, the serving cell can be a PCell. Also for example, the serving cell can be a PSCell. Also for example, the serving cell can be a sPCell. Also for example, the serving cell can include all cells configured by the access network device for the terminal.

[0162] As described above, at present, when performing cell measurement, the terminal can measure the SSB of the serving cell and the candidate cell. The inventors have found in research that the bandwidth occupied by the SSB is narrow, and therefore, by measuring the SSB of the candidate cell, only the quality of a small amount of bandwidth of the candidate cell can be determined.

[0163] The inventors have also found that, although the bandwidth occupied by the CSI-RS is wide, the access network device only configures the CSI-RS measurement resource of the serving cell for the terminal, and does not configure the CSI-RS measurement resource of the candidate cell for the terminal. Therefore, when performing cell measurement, the terminal does not measure the CSI-RS of the candidate cell.

[0164] How to measure the reference signal, for example, how to measure the reference signal in cell measurement, needs further research.

[0165] Embodiments of the present application provide a communication method. FIG. 4 is a flowchart of the communication method provided by the embodiments of the present application. In FIG. 4, the first device and the second device are taken as an example of the execution subject of the interaction to illustrate the method. The first device can be a terminal or a device (such as a module, circuit, chip (such as a modem chip, or a SoC chip or SIP chip containing a modem core), chip system or processor) in the terminal, or a logic node, logic module or software for realizing all or part of the terminal function. The second device can be an access network device or a device (such as a module, circuit, chip (such as a modem chip, or a SoC chip or SIP chip containing a modem core), chip system or processor) in the access network device, or a logic node, logic module or software for realizing all or part of the access network device function.

[0166] As shown in FIG. 4, the method comprises:

[0167] S401: The second device sends first information; correspondingly, the first device receives the first information.

[0168] The first information can be used to configure (or indicate) the first CSI-RS measurement resource, and the first CSI-RS measurement resource can be the CSI-RS measurement resource of the first candidate cell; correspondingly, the first device can determine the first CSI-RS measurement resource according to the first information. The present application does not limit the specific process of configuring the first CSI-RS measurement resource by the first information. For example, the first information can configure the first CSI-RS measurement resource in a manner similar to the resource configuration information in S201.

[0169] In some implementations, the first information can also be used to configure other parameters of the first apparatus for performing cell measurement at the physical layer. For example, the first information can be used to configure (or indicate) the CSI-RS measurement resources of the serving cell. In some embodiments, the CSI-RS measurement resources of the serving cell and the CSI-RS measurement resources (e.g., the first CSI-RS measurement resources) of the candidate cell can be configured (or included) in the same resource set, or can be configured (or included) in different resource sets. The present disclosure does not limit the specific procedure of configuring the CSI-RS measurement resources of the serving cell by the first information. For example, the first information can be the resource configuration information in S201, which can be used to configure the CSI-RS measurement resources of the serving cell.

[0170] It should be understood that the number of CSI-RS measurement resources configured by the first information for one cell can be one or more. Optionally, the starting frequency domain position and / or the frequency domain width of all CSI-RS measurement resources of the same cell (e.g., the same candidate cell) can be the same. In some embodiments, the starting frequency domain position of the CSI-RS measurement resource can be the starting RB of the CSI-RS measurement resource, and the frequency domain width of the CSI-RS measurement resource can be the number of RBs occupied by the CSI-RS measurement resource. For example, for the first candidate cell, the first information can configure: CSI-RS measurement resource #1 to CSI-RS measurement resource #2. The starting RB of the CSI-RS measurement resource #1 to the CSI-RS measurement resource #2 is RB #1, and the CSI-RS measurement resource #1 to the CSI-RS measurement resource #2 occupies P RBs, where P is a positive integer.

[0171] The first information can be carried in a conventional message or a new message, which is not limited. For example, the first information can be carried in an RRC message (e.g., an RRC configuration message or an RRC reconfiguration message), a medium access control-control element (MAC CE), or a downlink control information (DCI).

[0172] The first information can have other names, such as configuration information, RRC configuration information, indication information, or resource indication information, as long as it has the same function, which is within the protection scope of the present disclosure.

[0173] S402: The first apparatus performs CSI-RS measurement according to the first CSI-RS measurement resource.

[0174] In some examples, the first information in S401 can be used to configure (or indicate) the first CSI-RS measurement resource; the first device can perform CSI-RS measurement according to the first CSI-RS measurement resource, and thus can determine the signal quality of the first candidate cell.

[0175] In some other examples, the first information in S401 can be used to configure (or indicate) the first CSI-RS measurement resource and the CSI-RS measurement resource of the serving cell; the first device can perform CSI-RS measurement according to the first CSI-RS measurement resource and the CSI-RS measurement resource of the serving cell, and thus can determine the signal quality of the first candidate cell and the signal quality of the serving cell.

[0176] Through the method shown in FIG. 4, the second device can configure the first device with the CSI-RS measurement resource of the candidate cell, so that when performing cell measurement, the first device can measure the CSI-RS of the candidate cell. The CSI-RS occupies a larger bandwidth, for example, the bandwidth occupied by the CSI-RS is larger than the bandwidth occupied by the SSB, and thus through the method shown in FIG. 4, the first device can determine the signal quality of the candidate cell in a larger bandwidth.

[0177] There can be multiple ways for the first device to perform CSI-RS measurement according to the first CSI-RS measurement resource, for example, at least one of the first way to the third way.

[0178] The first way: the first device measures the CSI-RS in the bandwidth of the first CSI-RS measurement resource. For example, the first device can measure the CSI-RS in the entire bandwidth of the first CSI-RS measurement resource.

[0179] The bandwidth of the first CSI-RS measurement resource can be the bandwidth of the frequency domain resource of the first CSI-RS measurement resource. For example, the frequency domain resource of the first CSI-RS measurement resource includes RB#1 to RB#P, and the bandwidth of the first CSI-RS measurement resource can be the bandwidth of RB#1 to RB#P, and the first device can measure the CSI-RS in RB#1 to RB#P. Wherein, P is a positive integer.

[0180] For example, the bandwidth of the first CSI-RS measurement resource can be as shown in FIG. 5, and the first device can measure the CSI-RS in the bandwidth of the first CSI-RS measurement resource.

[0181] Through the first way, the first device can measure the CSI-RS in the bandwidth of the first CSI-RS measurement resource, and thus can accurately determine the signal quality of the first candidate cell in the bandwidth of the first CSI-RS measurement resource.

[0182] The second manner is that the first device measures the CSI-RS in the first overlapping part. The first overlapping part is an overlapping part of the bandwidth of the first CSI-RS measurement resource and the bandwidth of the serving cell; in other words, the first overlapping part can be an overlapping part of the frequency domain resource of the first CSI-RS measurement resource and the bandwidth of the serving cell; or the first overlapping part can be a part of the frequency domain resource of the first CSI-RS measurement resource that is located in the bandwidth of the serving cell.

[0183] The specific content of the bandwidth of the first CSI-RS measurement resource can refer to the description of the bandwidth of the first CSI-RS measurement resource in the first manner, and will not be repeated here. The specific content of the serving cell can refer to the description of the serving cell in the term explanation part above, and will not be repeated here. Optionally, when the serving cell is a plurality of cells, the bandwidth of the serving cell can be the sum of the bandwidths of the plurality of cells, for example, can be the union of the bandwidths of the plurality of cells. The bandwidth of the first CSI-RS measurement resource and the bandwidth of the serving cell can partially or entirely overlap, which is not limited.

[0184] For example, the first overlapping part can be as shown in FIG. 5, and the first device measures the CSI-RS in the first overlapping part.

[0185] It should be understood that FIG. 5 is only an example and is not used to limit the relationship between the position of the bandwidth of the first CSI-RS measurement resource and the position of the bandwidth of the serving cell. For example, the starting frequency domain position of the bandwidth of the first CSI-RS measurement resource is the same as the starting frequency domain position of the bandwidth of the serving cell, and the ending frequency domain position of the bandwidth of the first CSI-RS measurement resource is the same as the ending frequency domain position of the bandwidth of the serving cell. For another example, the starting frequency domain position of the bandwidth of the first CSI-RS measurement resource is different from the starting frequency domain position of the bandwidth of the serving cell, and the ending frequency domain position of the bandwidth of the first CSI-RS measurement resource is the same as the ending frequency domain position of the bandwidth of the serving cell. For another example, the starting frequency domain position of the bandwidth of the first CSI-RS measurement resource is the same as the starting frequency domain position of the bandwidth of the serving cell, and the ending frequency domain position of the bandwidth of the first CSI-RS measurement resource is different from the ending frequency domain position of the bandwidth of the serving cell. For another example, the starting frequency domain position of the bandwidth of the first CSI-RS measurement resource is different from the starting frequency domain position of the bandwidth of the serving cell, and the ending frequency domain position of the bandwidth of the first CSI-RS measurement resource is different from the ending frequency domain position of the bandwidth of the serving cell. The starting frequency domain position is, for example, the starting RB, and the ending frequency domain position is, for example, the ending RB.

[0186] It should also be appreciated that FIG. 5 is also not intended to limit the relationship between the size of the bandwidth of the first CSI-RS measurement resource and the size of the bandwidth of the serving cell. In some examples, the size of the bandwidth of the first CSI-RS measurement resource can be smaller than the size of the bandwidth of the serving cell. For example, the bandwidth of the first CSI-RS measurement resource can be contained in the bandwidth of the serving cell. In other examples, the size of the bandwidth of the first CSI-RS measurement resource can be larger than the size of the bandwidth of the serving cell. For example, the bandwidth of the first CSI-RS measurement resource can contain the bandwidth of the serving cell.

[0187] In the second approach, the first apparatus can measure the CSI-RS in the overlapping part of the bandwidth of the first CSI-RS measurement resource and the bandwidth of the serving cell, so that the signal quality of the first candidate cell in the bandwidth of the overlapping part can be accurately determined, and the problem that the CSI-RS measurement resource cannot be measured when the bandwidth of the first CSI-RS measurement resource is large can be avoided.

[0188] In the third approach, the first apparatus measures the CSI-RS in a second overlapping part. The second overlapping part is the overlapping part of the bandwidth of the first CSI-RS measurement resource and the bandwidth of the active BWP of the serving cell. In other words, the second overlapping part can be the overlapping part of the frequency domain resource of the first CSI-RS measurement resource and the active BWP of the serving cell, or the part of the frequency domain resource of the first CSI-RS measurement resource that is located in the active BWP of the serving cell.

[0189] The specific content of the bandwidth of the first CSI-RS measurement resource can refer to the description of the bandwidth of the first CSI-RS measurement resource in the first approach, and will not be repeated here. The specific content of the serving cell can refer to the description of the serving cell in the term explanation part above, and will not be repeated here. Optionally, when the serving cell is a plurality of cells, the bandwidth of the active BWP of the serving cell can be the sum of the bandwidth of the active BWP of the plurality of cells, for example, can be the union of the bandwidth of the active BWP of the plurality of cells. The bandwidth of the first CSI-RS measurement resource and the bandwidth of the active BWP of the serving cell can partially or entirely overlap, which is not limited.

[0190] For example, the second overlapping part can be as shown in FIG. 5, and the first apparatus measures the CSI-RS in the second overlapping part.

[0191] It should be understood that FIG. 5 is merely an example and is not intended to limit the relationship between the location of the bandwidth of the first CSI-RS measurement resource and the location of the bandwidth of the active BWP of the serving cell. For example, the starting frequency domain location of the bandwidth of the first CSI-RS measurement resource is the same as the starting frequency domain location of the bandwidth of the active BWP of the serving cell, and the ending frequency domain location of the bandwidth of the first CSI-RS measurement resource is the same as the ending frequency domain location of the bandwidth of the active BWP of the serving cell. For another example, the starting frequency domain location of the bandwidth of the first CSI-RS measurement resource is different from the starting frequency domain location of the bandwidth of the active BWP of the serving cell, and the ending frequency domain location of the bandwidth of the first CSI-RS measurement resource is the same as the ending frequency domain location of the bandwidth of the active BWP of the serving cell. For yet another example, the starting frequency domain location of the bandwidth of the first CSI-RS measurement resource is the same as the starting frequency domain location of the bandwidth of the active BWP of the serving cell, and the ending frequency domain location of the bandwidth of the first CSI-RS measurement resource is different from the ending frequency domain location of the bandwidth of the active BWP of the serving cell. For yet another example, the starting frequency domain location of the bandwidth of the first CSI-RS measurement resource is different from the starting frequency domain location of the bandwidth of the active BWP of the serving cell, and the ending frequency domain location of the bandwidth of the first CSI-RS measurement resource is different from the ending frequency domain location of the bandwidth of the active BWP of the serving cell. Here, the starting frequency domain location is, for example, a starting RB, and the ending frequency domain location is, for example, an ending RB.

[0192] It should also be understood that FIG. 5 is not intended to limit the relationship between the size of the bandwidth of the first CSI-RS measurement resource and the size of the bandwidth of the active BWP of the serving cell. In some examples, the size of the bandwidth of the first CSI-RS measurement resource can be smaller than the size of the bandwidth of the active BWP of the serving cell. For example, the bandwidth of the first CSI-RS measurement resource can be contained in the bandwidth of the active BWP of the serving cell. In other examples, the size of the bandwidth of the first CSI-RS measurement resource can be larger than the size of the bandwidth of the active BWP of the serving cell. For example, the bandwidth of the first CSI-RS measurement resource can contain the bandwidth of the active BWP of the serving cell.

[0193] By the third approach, the first apparatus can measure the CSI-RS in the overlapping part of the bandwidth of the first CSI-RS measurement resource and the bandwidth of the active BWP of the serving cell, so that the signal quality of the first candidate cell in the bandwidth of the overlapping part can be accurately determined, and the problem that the first CSI-RS measurement resource cannot be measured when the bandwidth of the first CSI-RS measurement resource is large can be avoided.

[0194] Optionally, the first device can determine a manner for performing the CSI-RS measurement based on the first CSI-RS measurement resource; in other words, the first device can determine a first measurement manner, which can be the manner for performing the CSI-RS measurement based on the first CSI-RS measurement resource by the first device. For example, the first measurement manner can be one of the first manner to the third manner. The first device can determine the first measurement manner in various manners, such as at least one of the manner a1 to the manner a3.

[0195] The manner a1: the second device can send second information; correspondingly, the first device receives the second information. The second information can be used to determine (or indicate or configure) the manner for performing the CSI-RS measurement based on the first CSI-RS measurement resource; in other words, the second information can be used to determine (or indicate or configure) the first measurement manner. Correspondingly, the first device can determine the first measurement manner based on the second information.

[0196] In some implementations, the second information can indicate the first measurement manner; correspondingly, the first device can perform the CSI-RS measurement based on the first measurement manner indicated by the second information. The specific content of the second information indicating the first measurement manner is not limited.

[0197] Optionally, the first measurement manner indicated by the second information can be selected from a first set; in other words, the second device can select the first measurement manner indicated by the second information from the first set. The first set can include candidate measurement manners. For example, the first set can include one or more combinations of the first manner to the third manner. For example, the first set can include the first manner, the second manner and the third manner. For another example, the first set can include the first manner and the second manner. For yet another example, the first set can include the first manner and the third manner. For yet another example, the first set can include the second manner and the third manner.

[0198] In other implementations, the candidate measurement manners include a manner #1, for example, the manner #1 can be one of the first manner to the third manner; a parameter #1 can be used to indicate whether to start the manner #1. The first device can determine the first measurement manner based on whether the second information includes the parameter #1. The following is an example.

[0199] In a first example, if the second information includes the parameter #1 and the parameter #1 indicates to start the manner #1, the first device can determine that the first measurement manner is the manner #1.

[0200] In a second example, if the second information includes the parameter #1 and the parameter #1 indicates not to start the manner #1, the first device can determine that the first measurement manner is the second manner.

[0201] In the third example, if the second information does not include the parameter #1, the first apparatus can determine that the first measurement manner is the manner #2.

[0202] Optionally, in the second example and the third example, the manner #2 is different from the manner #1. This is exemplified as follows.

[0203] In some examples, the manner #2 can be any one of the first manner to the third manner which is different from the manner #1. For example, the manner #1 is the first manner, and the manner #2 can be the second manner or the third manner.

[0204] In other examples, the manner #2 can be a set (or default) manner which is different from the manner #1 among the first manner to the third manner. For example, the manner #1 is the first manner, and the manner #2 can be a set (default) manner among the second manner or the third manner.

[0205] The second information can be carried in a conventional message, or can be carried in a new message, without limitation. For example, the second information can be carried in an RRC message (e.g., an RRC configuration message or an RRC reconfiguration message), a MAC CE, or a DCI. The second information and the first information can be carried in the same message, or can be carried in different messages. In the case where the second information and the first information are carried in different messages, the transmission order of the second information and the first information is not limited.

[0206] The second information can have other names, such as configuration information, RRC configuration information, indication information, or resource indication information, as long as it has the same function, and is within the protection scope of the present application.

[0207] According to the manner a1, the first apparatus can accurately determine the first measurement manner according to the second information, i.e., accurately determine the manner in which the first apparatus performs CSI-RS measurement according to the first CSI-RS measurement resource. In addition, in this manner, the first measurement manner can be determined according to the second information from the second apparatus, so that the second apparatus can configure the first measurement manner for the first apparatus, thereby enabling more effective management of the first apparatus.

[0208] Manner a2: the first measurement manner can be determined according to the capability of the first apparatus; in other words, the first measurement manner is associated with the capability of the first apparatus. Correspondingly, the first apparatus can determine the first measurement manner according to the capability of the first apparatus.

[0209] Optionally, the capability of the first device comprises one or more of the following in combination: whether the first device supports the first manner; whether the first device supports the second manner; whether the first device supports the third manner; whether the first device supports CSI-RS measurement of the candidate cell based on the physical layer measurement; whether the first device supports (or is capable of) measuring CSI-RS outside the bandwidth of the serving cell; or whether the first device supports (or is capable of) measuring CSI-RS outside the bandwidth of the active BWP of the serving cell.

[0210] In this application, whether the first device supports the first manner can be replaced by (or can be understood as) at least one of the following: whether the first device is capable of CSI-RS measurement by the first manner, or whether the first device is capable of measuring CSI-RS in the bandwidth of the CSI-RS measurement resource of the candidate cell. Whether the first device supports the second manner can be replaced by (or can be understood as) at least one of the following: whether the first device is capable of CSI-RS measurement by the second manner, or whether the first device is capable of measuring CSI-RS in the overlapping part of the bandwidth of the CSI-RS measurement resource of the candidate cell and the bandwidth of the serving cell. Whether the first device supports the third manner can be replaced by (or can be understood as) at least one of the following: whether the first device is capable of CSI-RS measurement by the third manner, or whether the first device is capable of measuring CSI-RS in the overlapping part of the bandwidth of the CSI-RS measurement resource of the candidate cell and the bandwidth of the active BWP of the serving cell. Whether the first device supports (or is capable of) measuring CSI-RS outside the bandwidth of the active BWP of the serving cell can be replaced by (or can be understood as): whether the first device supports (or is capable of) measuring CSI-RS outside the active BWP of the serving cell.

[0211] The following will illustrate the association between the first measurement manner and the capability of the first device in combination with the capability of the first device described above; accordingly, the first device can determine the first measurement manner according to the association.

[0212] In some examples, in the case that the first device supports the first manner, the first measurement manner can be the first manner, i.e. the first device measures CSI-RS in the bandwidth of the first CSI-RS measurement resource; and / or in the case that the first device does not support the first manner, the first measurement manner is the second manner or the third manner, i.e. the first device measures CSI-RS in the first overlapping part, or the first device measures CSI-RS in the second overlapping part.

[0213] In some examples, the first measurement manner can be the second manner if the first device supports the second manner, i.e., the first device measures the CSI-RS in the first overlapping part; and / or the first measurement manner is the first manner or the third manner if the first device does not support the second manner, i.e., the first device measures the CSI-RS in the bandwidth of the first CSI-RS measurement resource, or the first device measures the CSI-RS in the second overlapping part.

[0214] In some examples, the first measurement manner can be the third manner if the first device supports the third manner, i.e., the first device measures the CSI-RS in the second overlapping part; and / or the first measurement manner is the first manner or the second manner if the first device does not support the third manner, i.e., the first device measures the CSI-RS in the bandwidth of the first CSI-RS measurement resource, or the first device measures the CSI-RS in the first overlapping part.

[0215] In some examples, the first measurement manner can be the third manner if the first device supports the third manner, i.e., the first device measures the CSI-RS in the second overlapping part; and / or the first measurement manner is the first manner or the second manner if the first device does not support the third manner, i.e., the first device measures the CSI-RS in the bandwidth of the first CSI-RS measurement resource, or the first device measures the CSI-RS in the first overlapping part.

[0216] In some examples, the first measurement manner can be the second manner if the first device does not support measuring the CSI-RS outside the bandwidth of the serving cell, i.e., the first device measures the CSI-RS in the first overlapping part; and / or the first measurement manner is the first manner if the first device supports measuring the CSI-RS outside the bandwidth of the serving cell, i.e., the first device measures the CSI-RS in the bandwidth of the first CSI-RS measurement resource.

[0217] In some examples, the first measurement manner can be the third manner if the first device does not support measuring the CSI-RS outside the bandwidth of the active BWP of the serving cell, i.e., the first device measures the CSI-RS in the second overlapping part; and / or the first measurement manner is the first manner or the second manner if the first device supports measuring the CSI-RS outside the bandwidth of the active BWP of the serving cell, i.e., the first device measures the CSI-RS in the bandwidth of the first CSI-RS measurement resource, or the first device measures the CSI-RS in the first overlapping part.

[0218] According to the manner a2, the first device can perform the CSI-RS measurement in the first measurement manner which is adapted to the capability of the first device. In addition, in this manner, the first measurement manner is determined by the first device, and no information for determining the first measurement manner is transmitted between the first device and the second device, so that the signaling overhead can be reduced.

[0219] Manner a3: The first measurement manner can be pre-configured, for example, configured by the protocol. For example, the first measurement manner is pre-configured as the first manner. For another example, the first measurement manner is pre-configured as the second manner. For yet another example, the first measurement manner is pre-configured as the third manner. Through the manner a3, the first device can accurately determine the first measurement manner.

[0220] In some possible manners, the method shown in FIG. 4 further includes S403:

[0221] S403: The first device transmits the first capability information; and correspondingly, the second device receives the first capability information.

[0222] The first capability information can be used to indicate one or more of the following in combination; in other words, the first capability information is used to indicate one or more of the following capabilities of the first device: whether the first device supports the first manner; whether the first device supports the second manner; whether the first device supports the third manner; whether the first device supports the CSI-RS based on the physical layer measurement of the candidate cell; whether the first device supports the measurement of the CSI-RS outside the bandwidth of the serving cell; or whether the first device supports the measurement of the CSI-RS outside the bandwidth of the activated BWP of the serving cell.

[0223] The specific content of the above-mentioned capability of the first device can refer to the description of the capability of the first device in the manner a2, and will not be described here.

[0224] The first capability information can be carried in a conventional message, or can be carried in a new message, which is not limited. For example, the first capability information can be carried in an RRC message, a MAC CE, or uplink control information (UCI).

[0225] The first capability information can have other names, for example, third information, capability indication information, or terminal capability information, as long as it has the same function, which is within the protection scope of the present application.

[0226] Optionally, S403 can be performed before S401.

[0227] Through this manner, the second device can accurately determine the capability of the first device according to the first capability information.

[0228] In some implementations, after receiving the first capability information, the second device can determine the first measurement manner according to the capability of the first device. The specific manner can refer to manner a2, except that the subject of operation is changed from the first device to the second device, and details are not described herein.

[0229] Optionally, after determining the first measurement manner, the second device can send second information, which can be used to determine (or indicate or configure) the first measurement manner. The specific content of the second information can refer to the description of the second information in manner a1, and details are not described herein. Through this scheme, the second device can configure or indicate the first measurement manner for the first device, which is adapted to the capability of the first device.

[0230] Optionally, the first capability information can also indicate the total number of CSI-RS measurement resources that the first device can measure, and the specific manner of indication is not limited. In this way, the second device can configure the CSI-RS measurement resources for the first device according to the total number of CSI-RS measurement resources that the first device can measure. For example, if the total number of CSI-RS measurement resources that the first device can measure is Q1, Q1 is a positive integer, then the second device can configure Q2 CSI-RS measurement resources for the first device, Q2 is less than or equal to Q1. This scheme can avoid the second device configuring the CSI-RS measurement resources for the first device that exceed the capability of the first device.

[0231] In some possible manners, the implementation of S702 can include at least one of manners b1 to b4.

[0232] Manner b1: If the manner of performing the CSI-RS measurement according to the first CSI-RS measurement resource is to measure the CSI-RS in the first overlapping part, and the bandwidth of the first overlapping part is less than the first bandwidth threshold, the first device can not measure the first CSI-RS measurement resource, or the first device can measure the CSI-RS in the bandwidth of the first CSI-RS measurement resource.

[0233] Optionally, manner b1 can be understood as: if the first measurement manner determined according to at least one of manners a1 to a3 above is the second manner, and the bandwidth of the first overlapping part is less than the first bandwidth threshold, the first device can not measure the first CSI-RS measurement resource, or the first device can measure the CSI-RS in the bandwidth of the first CSI-RS measurement resource.

[0234] The first bandwidth threshold can be pre-set, for example, specified by a protocol, or indicated by another device (for example, the second device or a core network device) to the first device, or determined by the first device.

[0235] The first device can not measure the first CSI-RS measurement resource, which can be replaced by at least one of the following: the first device can skip or stop measuring the first CSI-RS measurement resource; or the first device can not (or skip or stop) measure the CSI-RS according to the first CSI-RS measurement resource.

[0236] The specific content of the CSI-RS in the bandwidth of the first CSI-RS measurement resource measured by the first device can refer to the first mode, and will not be repeated here.

[0237] For example, the mode of measuring the CSI-RS according to the first CSI-RS measurement resource is to measure the CSI-RS in the first overlapping part. If the bandwidth of the first overlapping part is 1 megahertz (MHz) and the first bandwidth threshold is 5 MHz, the first device can not measure the first CSI-RS measurement resource, or the first device can measure the CSI-RS in the bandwidth of the first CSI-RS measurement resource.

[0238] Through mode b1, when the second mode is used to measure the CSI-RS according to the first CSI-RS measurement resource, if the bandwidth of the first overlapping part is small, the first device can not measure the first CSI-RS measurement resource, or can fall back to the first mode to measure. By not measuring the first CSI-RS measurement resource, unnecessary measurement operations of the first device can be avoided or reduced when the bandwidth of the first overlapping part is small, thereby reducing power consumption. By falling back to the first mode to measure, the actual measurement bandwidth can be increased when the bandwidth of the first overlapping part is small, so that the signal quality of the candidate cell can be better determined.

[0239] Mode b2: If the mode of measuring the CSI-RS according to the first CSI-RS measurement resource is to measure the CSI-RS in the first overlapping part, and the bandwidth of the first overlapping part is 0, the first device can not measure the first CSI-RS measurement resource, or the first device can measure the CSI-RS in the bandwidth of the first CSI-RS measurement resource.

[0240] Optionally, mode b2 can be understood as: if the first measurement mode determined according to at least one of modes a1 to a3 above is the second mode, and the bandwidth of the first overlapping part is 0, the first device can not measure the first CSI-RS measurement resource, or the first device can measure the CSI-RS in the bandwidth of the first CSI-RS measurement resource.

[0241] The specific content that the first device can not measure the first CSI-RS measurement resource can refer to the description of the first device can not measure the first CSI-RS measurement resource in the manner b1; the specific content that the first device can measure the CSI-RS in the bandwidth of the first CSI-RS measurement resource can refer to the first manner, and details are not repeated.

[0242] In the manner b2, when the second manner is used to measure the CSI-RS according to the first CSI-RS measurement resource, if the bandwidth of the first overlapping part is 0, the first device can not measure the first CSI-RS measurement resource, or can fall back to the first manner to measure. By not measuring the first CSI-RS measurement resource, unnecessary measurement operation of the first device can be avoided or reduced in the case that the bandwidth of the first overlapping part is 0, and thus the power consumption can be reduced. By falling back to the first manner to measure, the actual measurement bandwidth can be increased in the case that the bandwidth of the first overlapping part is 0, and thus the signal quality of the candidate cell can be better determined.

[0243] The manner b3: if the manner of measuring the CSI-RS according to the first CSI-RS measurement resource is to measure the CSI-RS in the second overlapping part, and the bandwidth of the second overlapping part is less than the second bandwidth threshold, the first device can perform one of the following operations: not measuring the first CSI-RS measurement resource, measuring the CSI-RS in the bandwidth of the first CSI-RS measurement resource, or measuring the CSI-RS in the first overlapping part.

[0244] Optionally, the manner b3 can be understood as: if the first measurement manner determined according to at least one of the manners a1 to a3 is the third manner, and the bandwidth of the second overlapping part is less than the second bandwidth threshold, the first device can perform one of the following operations: not measuring the first CSI-RS measurement resource, measuring the CSI-RS in the bandwidth of the first CSI-RS measurement resource, or measuring the CSI-RS in the first overlapping part.

[0245] The second bandwidth threshold can be pre-set, for example, specified by a protocol, or indicated by another device (for example, the second device or a core network device) to the first device, or determined by the first device. Optionally, the second bandwidth threshold and the first bandwidth threshold can be the same or different.

[0246] The specific content that the first device can not measure the first CSI-RS measurement resource can refer to the description of the first device can not measure the first CSI-RS measurement resource in the manner b1; the specific content that the first device can measure the CSI-RS in the bandwidth of the first CSI-RS measurement resource can refer to the first manner, and details are not repeated.

[0247] For example, the way of measuring CSI-RS according to the first CSI-RS measurement resource is: measuring the CSI-RS in the second overlapping part. If the bandwidth of the second overlapping part is 1MHz and the second bandwidth threshold is 5MHz, the first device can perform one of the following operations: not measuring the first CSI-RS measurement resource, measuring the CSI-RS in the bandwidth of the first CSI-RS measurement resource, or measuring the CSI-RS in the first overlapping part.

[0248] According to the third way, if the bandwidth of the second overlapping part is small, the first device can not measure the first CSI-RS measurement resource, or can fall back to the first way or the second way to measure. By not measuring the first CSI-RS measurement resource, unnecessary measurement operations of the first device can be avoided or reduced when the bandwidth of the second overlapping part is small, and thus the power consumption can be reduced. By falling back to the first way or the second way to measure, the actual measurement bandwidth can be increased when the bandwidth of the second overlapping part is small, and thus the signal quality of the candidate cell can be determined better.

[0249] The way b4: If the way of measuring CSI-RS according to the first CSI-RS measurement resource is: measuring the CSI-RS in the second overlapping part, and the bandwidth of the second overlapping part is 0, the first device can perform one of the following operations: not measuring the first CSI-RS measurement resource, measuring the CSI-RS in the bandwidth of the first CSI-RS measurement resource, or measuring the CSI-RS in the first overlapping part.

[0250] Optionally, the way b4 can be understood as: if the first measurement way determined according to at least one of the ways a1 to a3 is the third way, and the bandwidth of the second overlapping part is 0, the first device can perform one of the following operations: not measuring the first CSI-RS measurement resource, measuring the CSI-RS in the bandwidth of the first CSI-RS measurement resource, or measuring the CSI-RS in the first overlapping part.

[0251] The specific content of not measuring the first CSI-RS measurement resource can refer to the description of “the first device can not measure the first CSI-RS measurement resource” in the way b1; the specific content of measuring the CSI-RS in the bandwidth of the first CSI-RS measurement resource can refer to the first way; the specific content of measuring the CSI-RS in the first overlapping part can refer to the second way, which will not be repeated here.

[0252] In the third way, when the first device measures the CSI-RS according to the first CSI-RS measurement resource, if the bandwidth of the second overlapping part is 0, the first device can not measure the first CSI-RS measurement resource, or can fall back to the first way or the second way to measure. By not measuring the first CSI-RS measurement resource, unnecessary measurement operation of the first device can be avoided or reduced in the case that the bandwidth of the second overlapping part is 0, and thus the power consumption can be reduced. By falling back to the first way or the second way to measure, the actual measurement bandwidth can be increased in the case that the bandwidth of the second overlapping part is 0, and thus the signal quality of the candidate cell can be determined better.

[0253] In some possible ways, the first device can perform the CSI-RS measurement without MG according to the first CSI-RS measurement resource in the case that the first condition is met. The first condition includes one or more of the following conditions a1 to a13 in combination.

[0254] Condition a1: the actual measurement bandwidth corresponding to the first CSI-RS measurement resource is contained in the bandwidth of the serving cell.

[0255] Optionally, the condition a1 can be replaced by (or can be understood as) at least one of the following: the actual measurement bandwidth corresponding to the first CSI-RS measurement resource belongs to the bandwidth of the serving cell; the frequency domain resource of the actual measurement resource corresponding to the first CSI-RS measurement resource is contained in the bandwidth of the serving cell; or, the bandwidth of the frequency domain resource of the actual measurement resource corresponding to the first CSI-RS measurement resource is contained in the bandwidth of the serving cell.

[0256] In this application, the actual measurement bandwidth corresponding to the first CSI-RS measurement resource can have various possible forms. In some examples, if the first measurement way (i.e., the way in which the first device measures the CSI-RS according to the first CSI-RS measurement resource) is the first way, the actual measurement bandwidth corresponding to the first CSI-RS measurement resource is the bandwidth of the first CSI-RS measurement resource; correspondingly, the actual measurement resource corresponding to the first CSI-RS measurement resource is the first CSI-RS measurement resource. In other examples, if the first measurement way is the second way described above, the actual measurement bandwidth corresponding to the first CSI-RS measurement resource is the bandwidth of the first overlapping part; correspondingly, the actual measurement resource corresponding to the first CSI-RS measurement resource is the first overlapping part. In yet other examples, if the first measurement way is the third way described above, the actual measurement bandwidth corresponding to the first CSI-RS measurement resource is the bandwidth of the second overlapping part; correspondingly, the actual measurement resource corresponding to the first CSI-RS measurement resource is the second overlapping part.

[0257] For example, if the actual measurement bandwidth corresponding to the first CSI-RS measurement resource is the bandwidth corresponding to RB#1 to RB#P, the bandwidth of the serving cell includes the bandwidth corresponding to RB#1 to RB#P, and P is a positive integer, the condition a1 is satisfied.

[0258] Condition a2: The actual measurement bandwidth corresponding to the first CSI-RS measurement resource is contained in the bandwidth of the active BWP of the serving cell.

[0259] Optionally, the condition a2 can be replaced by (or can be understood as) at least one of the following: the actual measurement bandwidth corresponding to the first CSI-RS measurement resource belongs to the bandwidth of the active BWP of the serving cell; the frequency domain resource of the actual measurement resource corresponding to the first CSI-RS measurement resource is contained in the active BWP of the serving cell; or, the bandwidth of the frequency domain resource of the actual measurement resource corresponding to the first CSI-RS measurement resource is contained in the bandwidth of the active BWP of the serving cell.

[0260] The specific content of the actual measurement bandwidth corresponding to the first CSI-RS measurement resource can refer to the description of the "actual measurement bandwidth corresponding to the first CSI-RS measurement resource" in condition a1, and the specific content of the actual measurement resource corresponding to the first CSI-RS measurement resource can refer to the description of the "actual measurement resource corresponding to the first CSI-RS measurement resource" in condition a1, which will not be repeated here.

[0261] For example, if the actual measurement bandwidth corresponding to the first CSI-RS measurement resource is the bandwidth corresponding to RB#1 to RB#P, the bandwidth of the active BWP of the serving cell includes the bandwidth corresponding to RB#1 to RB#P, and P is a positive integer, the condition a2 is satisfied.

[0262] Conditions a1 and a2 show two conditions for determining whether to perform MG-free CSI-RS measurement according to the actual measurement bandwidth corresponding to the first CSI-RS measurement resource. It should be understood that the condition for determining whether to perform MG-free CSI-RS measurement according to the actual measurement bandwidth corresponding to the first CSI-RS measurement resource can also include other possible conditions, which are not limited.

[0263] Condition a3: The subcarrier spacing used by the first CSI-RS measurement resource is the same as the subcarrier spacing of the serving cell.

[0264] Optionally, the subcarrier spacing of the first CSI-RS measurement resource can be replaced by (or can be understood as) at least one of: the subcarrier spacing used (or corresponding to) by the first CSI-RS measurement resource, or the subcarrier spacing of the first CSI-RS measurement resource. The subcarrier spacing of the serving cell can be replaced by (or can be understood as) at least one of: the subcarrier spacing used (or corresponding to) by the serving cell, the subcarrier spacing of the bandwidth of the serving cell, or the subcarrier spacing used (or corresponding to) by the bandwidth of the serving cell.

[0265] For example, if the subcarrier spacing used by the first CSI-RS measurement resource is 15 kilohertz (KHz) and the subcarrier spacing of the serving cell is 15 KHz, the condition a3 is satisfied.

[0266] Condition a4: The subcarrier spacing used by the first CSI-RS measurement resource is the same as the subcarrier spacing of the active BWP of the serving cell.

[0267] Optionally, the subcarrier spacing of the active BWP of the serving cell can be replaced by (or can be understood as): the subcarrier spacing used (or corresponding to) by the active BWP of the serving cell.

[0268] The specific content of condition a4 can refer to condition a3, except that the subcarrier spacing of the serving cell is replaced by the subcarrier spacing of the active BWP of the serving cell, and the repeated parts will not be described again.

[0269] Condition a5: The cyclic redundancy prefix used by the first CSI-RS measurement resource is the same as the cyclic redundancy prefix of the serving cell.

[0270] Optionally, the cyclic redundancy prefix used by the first CSI-RS measurement resource can be replaced by (or can be understood as) at least one of: the cyclic redundancy prefix used (or corresponding to) by the first CSI-RS measurement resource, or the cyclic redundancy prefix of the first CSI-RS measurement resource. The cyclic redundancy prefix of the serving cell can be replaced by (or can be understood as) at least one of: the cyclic redundancy prefix used (or corresponding to) by the serving cell, the cyclic redundancy prefix of the bandwidth of the serving cell, or the cyclic redundancy prefix used (or corresponding to) by the bandwidth of the serving cell.

[0271] For example, if the cyclic redundancy prefix used by the first CSI-RS measurement resource is cyclic redundancy prefix #1 and the cyclic redundancy prefix of the serving cell is cyclic redundancy prefix #1, the condition a5 is satisfied.

[0272] Condition a6: The cyclic redundancy prefix used by the first CSI-RS measurement resource is the same as the cyclic redundancy prefix of the active BWP of the serving cell.

[0273] Optionally, the cyclic redundancy check of the active BWP of the serving cell can be replaced by (or can be understood as) that the active BWP of the serving cell adopts (or uses or corresponds to) the cyclic redundancy check.

[0274] The specific content of condition a6 can refer to condition a5, except that the subcarrier spacing of the serving cell is replaced by the subcarrier spacing of the active BWP of the serving cell, and the repeated parts will not be described again.

[0275] Condition a7: the starting RB of the first CSI-RS measurement resource is the same as the starting RB of the bandwidth of the serving cell.

[0276] For example, if the starting RB of the first CSI-RS measurement resource is RB#1 and the starting RB of the bandwidth of the serving cell is RB#1, condition a7 is met.

[0277] Condition a8: the starting RB of the first CSI-RS measurement resource is the same as the starting RB of the active BWP of the serving cell.

[0278] For example, if the starting RB of the first CSI-RS measurement resource is RB#1 and the starting RB of the active BWP of the serving cell is RB#1, condition a8 is met.

[0279] Condition a9: the ending RB of the first CSI-RS measurement resource is the same as the ending RB of the bandwidth of the serving cell.

[0280] For example, if the ending RB of the first CSI-RS measurement resource is RB#2 and the ending RB of the bandwidth of the serving cell is RB#2, condition a9 is met.

[0281] Condition a10: the ending RB of the first CSI-RS measurement resource is the same as the ending RB of the active BWP of the serving cell.

[0282] For example, if the ending RB of the first CSI-RS measurement resource is RB#2 and the ending RB of the active BWP of the serving cell is RB#2, condition a10 is met.

[0283] Condition a11: the center frequency point of the first CSI-RS measurement resource is the same as the center frequency point of the bandwidth of the serving cell.

[0284] For example, if the center frequency point of the first CSI-RS measurement resource is frequency point#1 and the center frequency point of the bandwidth of the serving cell is frequency point#1, condition a11 is met.

[0285] Condition a12: the center frequency point of the first CSI-RS measurement resource is the same as the center frequency point of the active BWP of the serving cell.

[0286] For example, if the center frequency of the first CSI-RS measurement resource is frequency #1, and the center frequency of the active BWP of the serving cell is frequency #1, the condition a12 is satisfied.

[0287] Condition a13: The first device supports CSI-RS measurement without MG.

[0288] Condition a13 can be replaced by (or can be understood as): The first device is capable of CSI-RS measurement without MG.

[0289] Optionally, in the case where the first condition is not satisfied, the first device can perform CSI-RS measurement with MG according to the first CSI-RS measurement resource.

[0290] In this way, the first device can accurately determine whether to perform CSI-RS measurement without MG according to the first CSI-RS measurement resource according to the first condition. In addition, in this way, the first condition is associated with the first CSI-RS measurement resource, and is not associated with CSI-RS measurement resources other than the first CSI-RS measurement resource. In this way, the first device can determine whether to perform CSI-RS measurement without MG according to each CSI-RS measurement resource, which is more flexible. In addition, this way provides multiple possible implementations of the first condition, which is easy to implement and more flexible.

[0291] In some possible ways, the first information in S401 can be used to configure at least one CSI-RS measurement resource of the first candidate cell, and the at least one CSI-RS measurement resource can include the first CSI-RS measurement resource. Optionally, the specific content of the CSI-RS measurement resource other than the first CSI-RS measurement resource in the at least one CSI-RS measurement resource can refer to the description of the first CSI-RS measurement resource above, and will not be repeated here.

[0292] In a case that the second condition is satisfied, the first device can perform the CSI-RS measurement without MG according to the at least one CSI-RS measurement resource. The second condition can include one or more of the following conditions b1 to b13: condition b1: an actual measurement bandwidth corresponding to the at least one CSI-RS measurement resource is contained in a bandwidth of the serving cell; condition b2: the actual measurement bandwidth corresponding to the at least one CSI-RS measurement resource is contained in a bandwidth of an active BWP of the serving cell; condition b3: a subcarrier spacing adopted by the at least one CSI-RS measurement resource is the same as a subcarrier spacing of the serving cell; condition b4: the subcarrier spacing adopted by the at least one CSI-RS measurement resource is the same as a subcarrier spacing of the active BWP of the serving cell; condition b5: a cyclic redundancy prefix adopted by the at least one CSI-RS measurement resource is the same as a cyclic redundancy prefix of the serving cell; condition b6: the cyclic redundancy prefix adopted by the at least one CSI-RS measurement resource is the same as a cyclic redundancy prefix of the active BWP of the serving cell; condition b7: a starting RB of the at least one CSI-RS measurement resource is the same as a starting RB of the bandwidth of the serving cell; condition b8: the starting RB of the at least one CSI-RS measurement resource is the same as a starting RB of the active BWP of the serving cell; condition b9: an ending RB of the at least one CSI-RS measurement resource is the same as an ending RB of the bandwidth of the serving cell; condition b10: the ending RB of the at least one CSI-RS measurement resource is the same as an ending RB of the active BWP of the serving cell; condition b11: a center frequency of the at least one CSI-RS measurement resource is the same as a center frequency of the bandwidth of the serving cell; condition b12: the center frequency of the at least one CSI-RS measurement resource is the same as a center frequency of the active BWP of the serving cell; or, condition b13: the first device supports the CSI-RS measurement without MG.

[0293] Optionally, in the conditions b1 to b12, the at least one CSI-RS measurement resource can be replaced by (or can be understood as) each of the at least one CSI-RS measurement resource.

[0294] The specific content of the conditions b1 to b13 can refer to the description of the conditions a1 to a13 above, except that the first CSI-RS measurement resource is replaced by the at least one CSI-RS measurement resource or each of the at least one CSI-RS measurement resource, and will not be repeated here.

[0295] For example, the at least one CSI-RS measurement resource configured by the first information comprises: CSI-RS measurement resource #1 and CSI-RS measurement resource #2. The CSI-RS measurement resource #1 and the CSI-RS measurement resource #2 are CSI-RS measurement resources of the first candidate cell. If the CSI-RS measurement resource #1 and the CSI-RS measurement resource #2 satisfy the second condition, the first device can perform the CSI-RS measurement without MG according to the CSI-RS measurement resource #1 and the CSI-RS measurement resource #2.

[0296] Optionally, in the case where the second condition is not satisfied, the first device can perform the CSI-RS measurement based on MG according to the at least one CSI-RS measurement resource. For example, the at least one CSI-RS measurement resource configured by the first information comprises: CSI-RS measurement resource #1 and CSI-RS measurement resource #2. The CSI-RS measurement resource #1 and the CSI-RS measurement resource #2 are CSI-RS measurement resources of the first candidate cell. If the CSI-RS measurement resource #1 and / or the CSI-RS measurement resource #2 do not satisfy the second condition, the first device can perform the CSI-RS measurement based on MG according to the CSI-RS measurement resource #1 and the CSI-RS measurement resource #2.

[0297] In this way, the first device can accurately determine whether to perform the CSI-RS measurement without MG according to the at least one CSI-RS measurement resource according to the second condition. In addition, in this way, the second condition is associated with the CSI-RS measurement resources of the first candidate cell and is not associated with the CSI-RS measurement resources of the candidate cells other than the first candidate cell, so that the first device can determine whether to perform the CSI-RS measurement without measurement gap for each candidate cell according to the CSI-RS measurement resources of the candidate cell, which is more flexible. In addition, this way provides multiple possible implementations of the second condition, which is easy to implement and more flexible.

[0298] In some possible implementations, the first information in S401 can be used to configure one or more CSI-RS measurement resources, the one or more CSI-RS measurement resources can be CSI-RS measurement resources of at least one candidate cell, the at least one candidate cell includes the first candidate cell, and the one or more CSI-RS measurement resources include the first CSI-RS measurement resource. Optionally, the specific content of the CSI-RS measurement resources other than the first CSI-RS measurement resource in the one or more CSI-RS measurement resources can be referred to the description of the first CSI-RS measurement resource above, and will not be described here.

[0299] In a case that the third condition is satisfied, the first device can perform the CSI-RS measurement without the MG according to the one or more CSI-RS measurement resources. The third condition includes one or more of the following conditions c1 to c13: condition c1: the actual measurement bandwidth corresponding to the one or more CSI-RS measurement resources is contained in the bandwidth of the serving cell; condition c2: the actual measurement bandwidth corresponding to the one or more CSI-RS measurement resources is contained in the bandwidth of the active BWP of the serving cell; condition c3: the subcarrier spacing adopted by the one or more CSI-RS measurement resources is the same as the subcarrier spacing of the serving cell; condition c4: the subcarrier spacing adopted by the one or more CSI-RS measurement resources is the same as the subcarrier spacing of the active BWP of the serving cell; condition c5: the cyclic redundancy prefix adopted by the one or more CSI-RS measurement resources is the same as the cyclic redundancy prefix of the serving cell; condition c6: the cyclic redundancy prefix adopted by the one or more CSI-RS measurement resources is the same as the cyclic redundancy prefix of the active BWP of the serving cell; condition c7: the starting RB of the one or more CSI-RS measurement resources is the same as the starting RB of the bandwidth of the serving cell; condition c8: the starting RB of the one or more CSI-RS measurement resources is the same as the starting RB of the active BWP of the serving cell; condition c9: the stop RB of the one or more CSI-RS measurement resources is the same as the stop RB of the bandwidth of the serving cell; condition c10: the stop RB of the one or more CSI-RS measurement resources is the same as the stop RB of the active BWP of the serving cell; condition c11: the center frequency point of the one or more CSI-RS measurement resources is the same as the center frequency point of the bandwidth of the serving cell; condition c12: the center frequency point of the one or more CSI-RS measurement resources is the same as the center frequency point of the active BWP of the serving cell; or, condition c13: the first device supports the CSI-RS measurement without the measurement gap.

[0300] Optionally, in the conditions c1 to c12, the one or more CSI-RS measurement resources can be replaced by (or can be understood as) each of the one or more CSI-RS measurement resources.

[0301] The specific content of the conditions c1 to c13 can refer to the description of the conditions a1 to a13 above, except that the first CSI-RS measurement resource is replaced by the one or more CSI-RS measurement resources, or each of the one or more CSI-RS measurement resources, and will not be repeated here.

[0302] For example, the one or more CSI-RS measurement resources configured by the first information comprise: CSI-RS measurement resource #1 to CSI-RS measurement resource #4. CSI-RS measurement resource #1 and CSI-RS measurement resource #2 are CSI-RS measurement resources of the first candidate cell. CSI-RS measurement resource #3 and CSI-RS measurement resource #4 are CSI-RS measurement resources of the second candidate cell. If the CSI-RS measurement resource #1 to CSI-RS measurement resource #4 satisfy the third condition, the first device can perform the CSI-RS measurement without MG according to the CSI-RS measurement resource #1 to CSI-RS measurement resource #4.

[0303] Optionally, in the case where the third condition is not satisfied, the first device can perform the CSI-RS measurement based on MG according to the one or more CSI-RS measurement resources. For example, the one or more CSI-RS measurement resources configured by the first information comprise: CSI-RS measurement resource #1 to CSI-RS measurement resource #4. CSI-RS measurement resource #1 and CSI-RS measurement resource #2 are CSI-RS measurement resources of the first candidate cell. CSI-RS measurement resource #3 and CSI-RS measurement resource #4 are CSI-RS measurement resources of the second candidate cell. If one or more of the CSI-RS measurement resource #1 to CSI-RS measurement resource #4 do not satisfy the third condition, the first device can perform the CSI-RS measurement based on MG according to the CSI-RS measurement resource #1 to CSI-RS measurement resource #4.

[0304] In this way, the first device can accurately determine whether to perform the CSI-RS measurement without MG according to the one or more CSI-RS measurement resources according to the third condition. In addition, in this way, the third condition is associated with the one or more CSI-RS measurement resources, so that the first device can uniformly determine whether to perform the CSI-RS measurement without measurement gap according to the one or more CSI-RS measurement resources, thereby reducing the complexity. Furthermore, this way provides a variety of possible implementation ways of the third condition, which is easy to implement and relatively flexible.

[0305] In some possible ways, the method shown in FIG. 4 further comprises S404:

[0306] S404: The first device sends the second capability information; and correspondingly, the second device receives the second capability information.

[0307] The second capability information is used to indicate whether the first device supports CSI-RS measurement without MG. In other words, the second capability information can be used to indicate whether the first device is capable of CSI-RS measurement without MG. The present application does not limit the way the second information indicates whether the first device supports CSI-RS measurement without MG.

[0308] The second capability information can be carried in a conventional message or a new message. For example, the second capability information can be carried in an RRC message, a MAC CE, or UCI. The second capability information and the first capability information can be carried in the same message or different messages.

[0309] The second capability information can also be referred to as fourth information, capability indication information, terminal capability information, or the like, as long as it has the same function and is within the protection scope of the present application.

[0310] Optionally, S404 can be performed before S401. The order of S404 and S403 is not limited.

[0311] In this way, the second device can accurately determine whether the first device supports CSI-RS measurement without MG according to the second capability information.

[0312] In some possible ways, the method shown in FIG. 4 further includes S405:

[0313] S405: The first device sends the measurement result. Correspondingly, the second device receives the measurement result.

[0314] The measurement result is obtained by performing CSI-RS measurement according to the first CSI-RS measurement resource.

[0315] Optionally, the measurement result can include at least one of the following: a result of CSI-RS measurement according to the CSI-RS measurement resource of the serving cell, or a measurement result of CSI-RS measurement according to the CSI-RS measurement resource of at least one candidate cell. The specific content of any CSI-RS measurement resource in the CSI-RS measurement resource of the at least one candidate cell can refer to the description of the first CSI-RS measurement resource above, and will not be repeated here.

[0316] For example, the first device can perform CSI-RS measurement according to the CSI-RS measurement resource of the serving cell and / or the CSI-RS measurement resource of the at least one candidate cell, to obtain the signal quality of all CSI-RS measurement resources in K+1 cells. The K+1 cells can include the serving cell and / or the at least one candidate cell. The first device can report the measurement result for L cells in the K+1 cells, where L is a positive integer. Table 3 shows a possible example of the measurement result reported by the first device. As shown in Table 3, for each of the L cells, the first device can report the index (or ID) and RSRP of M CSI-RS measurement resources, and the first device reports the index and RSRP of L*M CSI-RS measurement resources corresponding to the L cells, where M is a positive integer. Optionally, the L cells can be the L cells with the best signal quality in the K+1 cells.

[0317] Table 3

[0318] In this way, the second device can accurately determine the measurement result.

[0319] Based on the same technical concept as the method embodiments described above, the embodiments of the present application provide a corresponding communication device, which can be used to perform the functions of the related steps in the above method embodiments. The functions can be implemented by hardware, software or hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions. The communication device can be a terminal or an access network device, or can be a device (for example, a module, a communication module, a circuit or a chip responsible for communication functions (such as a modem chip, or a SoC chip or a SIP chip containing a modem core), a chip system or a processor) in a terminal or an access network device, or can be a logic node, a logic module or software that can implement all or part of the functions of a terminal or an access network device.

[0320] In one possible implementation, the structure of the communication device provided by the embodiments of the present application is shown in FIG. 6, which includes a processing unit 602. Optionally, the communication device also includes an interface unit 601. The functions of each unit in the communication device 600 are introduced as follows.

[0321] The interface unit 601 is configured to input and / or output information. The input information can be replaced by received information, and the output information can be replaced by transmitted information. When outputting the information, the interface unit 601 can output the information to other devices outside the communication apparatus 600, or output the information to other units in the communication apparatus 600. In some manners, the interface unit 601 can be implemented by at least one of a physical interface, a communication module, a communication interface, and an input / output interface. In other manners, the interface unit 601 can be implemented by an interface circuit, for example, a mobile communication module. The mobile communication module can include one or more of at least one antenna, at least one filter, a switch, a power amplifier, a low noise amplifier (LNA), and the like. The interface unit 601 is configured to perform the receiving operation and the sending operation in the above method embodiments.

[0322] In this application, the interface unit 601 can also be referred to as a transceiver unit or a communication unit. Optionally, the interface unit 601 can include a receiving unit and / or a sending unit, which are configured to input and output information, respectively. The receiving unit is configured to perform the receiving operation in the above method embodiments. The sending unit is configured to perform the sending operation in the above method embodiments.

[0323] The processing unit 602 can be configured to support the communication apparatus 600 to perform the processing actions in the above method embodiments. The processing unit 602 can be implemented by one or more processors. For example, the processor can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA), microcontroller units (MCU), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general-purpose processor can be a microprocessor, or any conventional processor. The processing unit 602 is configured to perform operations related to processing in the above method embodiments, for example, operations other than the receiving operation and the sending operation in the above method embodiments.

[0324] In an embodiment, the communication apparatus 600 is applied to the first device in the embodiment shown in FIG. 4. The specific functions of the processing unit 602 in this embodiment will be introduced below.

[0325] The processing unit 602 is configured to receive, through the interface unit 601, first information, the first information being used for configuring a first CSI-RS measurement resource, the first CSI-RS measurement resource being a CSI-RS measurement resource of a first candidate cell; and perform CSI-RS measurement according to the first CSI-RS measurement resource.

[0326] In some possible implementations, the processing unit 602 is specifically configured to perform the CSI-RS measurement according to the first CSI-RS measurement resource by means of a combination of one or more of the following: measuring a CSI-RS in a bandwidth of the first CSI-RS measurement resource; measuring a CSI-RS in a first overlapping part, the first overlapping part being an overlapping part of the bandwidth of the first CSI-RS measurement resource and a bandwidth of a serving cell; or measuring a CSI-RS in a second overlapping part, the second overlapping part being an overlapping part of the bandwidth of the first CSI-RS measurement resource and a bandwidth of an active bandwidth part (BWP) of the serving cell.

[0327] Optionally, the processing unit 602 is further configured to receive, through the interface unit 601, second information, the second information being used for determining a manner of performing the CSI-RS measurement according to the first CSI-RS measurement resource.

[0328] Optionally, the processing unit 602 is further configured to send, through the interface unit 601, first capability information, the first capability information being used for indicating a combination of one or more of the following: whether the first device supports a first manner in which the first device measures a CSI-RS in a bandwidth of the first CSI-RS measurement resource; whether the first device supports a second manner in which the first device measures a CSI-RS in the first overlapping part; whether the first device supports a third manner in which the first device measures a CSI-RS in the second overlapping part; whether the first device supports measuring a CSI-RS of the candidate cell based on a physical layer measurement; whether the first device supports measuring a CSI-RS outside a bandwidth of the serving cell; or whether the first device supports measuring a CSI-RS outside a bandwidth of the active BWP of the serving cell.

[0329] In some implementations, the processing unit 602 is specifically configured to, in a case where the first device does not support measuring a CSI-RS outside the bandwidth of the serving cell, measure a CSI-RS in the first overlapping part; and / or in a case where the first device supports measuring a CSI-RS outside the bandwidth of the serving cell, measure a CSI-RS in the bandwidth of the first CSI-RS measurement resource.

[0330] In some other implementations, the processing unit 602 is specifically configured to: measure the CSI-RS in the second overlapping part in the case that the first device does not support measuring the CSI-RS outside the bandwidth of the active BWP of the serving cell; and / or measure the CSI-RS in the first overlapping part in the case that the first device supports measuring the CSI-RS outside the bandwidth of the active BWP of the serving cell, or measure the CSI-RS in the bandwidth of the first CSI-RS measurement resource.

[0331] In some possible manners, the processing unit 602 is specifically configured to perform the CSI-RS measurement according to the first CSI-RS measurement resource by at least one of:

[0332] If the manner of performing the CSI-RS measurement according to the first CSI-RS measurement resource is to measure the CSI-RS in the first overlapping part and the bandwidth of the first overlapping part is smaller than the first bandwidth threshold, the first CSI-RS measurement resource is not measured, or the CSI-RS in the bandwidth of the first CSI-RS measurement resource is measured.

[0333] If the manner of performing the CSI-RS measurement according to the first CSI-RS measurement resource is to measure the CSI-RS in the first overlapping part and the bandwidth of the first overlapping part is 0, the first CSI-RS measurement resource is not measured, or the CSI-RS in the bandwidth of the first CSI-RS measurement resource is measured.

[0334] If the manner of performing the CSI-RS measurement according to the first CSI-RS measurement resource is to measure the CSI-RS in the second overlapping part and the bandwidth of the second overlapping part is smaller than the second bandwidth threshold, one of the following operations is performed: the first CSI-RS measurement resource is not measured, the CSI-RS in the bandwidth of the first CSI-RS measurement resource is measured, or the CSI-RS in the first overlapping part is measured; or

[0335] If the manner of performing the CSI-RS measurement according to the first CSI-RS measurement resource is to measure the CSI-RS in the second overlapping part and the bandwidth of the second overlapping part is 0, one of the following operations is performed: the first CSI-RS measurement resource is not measured, the CSI-RS in the bandwidth of the first CSI-RS measurement resource is measured, or the CSI-RS in the first overlapping part is measured.

[0336] In some implementations, the processing unit 602 is specifically configured to: in a case where a first condition is satisfied, perform CSI-RS measurement without measurement gap according to a first CSI-RS measurement resource; and wherein the first condition comprises one or more of the following in combination: an actual measurement bandwidth corresponding to the first CSI-RS measurement resource is contained in a bandwidth of a serving cell; the actual measurement bandwidth corresponding to the first CSI-RS measurement resource is contained in a bandwidth of an active BWP of the serving cell; a subcarrier spacing adopted by the first CSI-RS measurement resource is the same as a subcarrier spacing of the serving cell; the subcarrier spacing adopted by the first CSI-RS measurement resource is the same as a subcarrier spacing of the active BWP of the serving cell; a cyclic redundancy prefix adopted by the first CSI-RS measurement resource is the same as a cyclic redundancy prefix of the serving cell; the cyclic redundancy prefix adopted by the first CSI-RS measurement resource is the same as a cyclic redundancy prefix of the active BWP of the serving cell; a starting resource block (RB) of the first CSI-RS measurement resource is the same as a starting RB of the bandwidth of the serving cell; the starting RB of the first CSI-RS measurement resource is the same as a starting RB of the active BWP of the serving cell; an ending RB of the first CSI-RS measurement resource is the same as an ending RB of the bandwidth of the serving cell; the ending RB of the first CSI-RS measurement resource is the same as an ending RB of the active BWP of the serving cell; a center frequency point of the first CSI-RS measurement resource is the same as a center frequency point of the bandwidth of the serving cell; the center frequency point of the first CSI-RS measurement resource is the same as a center frequency point of the active BWP of the serving cell; or the first device supports CSI-RS measurement without measurement gap.

[0337] In some other implementations, the first information is used to configure at least one CSI-RS measurement resource of the first candidate cell, the at least one CSI-RS measurement resource including the first CSI-RS measurement resource, and the processing unit 602 is specifically configured to: perform CSI-RS measurement without measurement gap according to the at least one CSI-RS measurement resource in a case where a second condition is satisfied, wherein the second condition includes one or more of the following in combination: an actual measurement bandwidth corresponding to the at least one CSI-RS measurement resource is contained in a bandwidth of the serving cell; the actual measurement bandwidth corresponding to the at least one CSI-RS measurement resource is contained in a bandwidth of an active BWP of the serving cell; a subcarrier spacing adopted by the at least one CSI-RS measurement resource is the same as a subcarrier spacing of the serving cell; the subcarrier spacing adopted by the at least one CSI-RS measurement resource is the same as a subcarrier spacing of the active BWP of the serving cell; a cyclic redundancy prefix adopted by the at least one CSI-RS measurement resource is the same as a cyclic redundancy prefix of the serving cell; the cyclic redundancy prefix adopted by the at least one CSI-RS measurement resource is the same as a cyclic redundancy prefix of the active BWP of the serving cell; a starting RB of the at least one CSI-RS measurement resource is the same as a starting RB of the bandwidth of the serving cell; the starting RB of the at least one CSI-RS measurement resource is the same as a starting RB of the active BWP of the serving cell; an ending RB of the at least one CSI-RS measurement resource is the same as an ending RB of the bandwidth of the serving cell; the ending RB of the at least one CSI-RS measurement resource is the same as an ending RB of the active BWP of the serving cell; a center frequency of the at least one CSI-RS measurement resource is the same as a center frequency of the bandwidth of the serving cell; the center frequency of the at least one CSI-RS measurement resource is the same as a center frequency of the active BWP of the serving cell; or the first device supports CSI-RS measurement without measurement gap.

[0338] In yet another implementation, the first information is used to configure one or more CSI-RS measurement resources, the one or more CSI-RS measurement resources are CSI-RS measurement resources of at least one candidate cell, the at least one candidate cell includes the first candidate cell, the one or more CSI-RS measurement resources include the first CSI-RS measurement resource, and the processing unit 602 is specifically configured to: perform the CSI-RS measurement without the measurement gap according to the one or more CSI-RS measurement resources in a case where a third condition is met, wherein the third condition includes one or more combinations of: an actual measurement bandwidth corresponding to the one or more CSI-RS measurement resources being contained in a bandwidth of the serving cell; the actual measurement bandwidth corresponding to the one or more CSI-RS measurement resources being contained in a bandwidth of an active BWP of the serving cell; a subcarrier spacing used by the one or more CSI-RS measurement resources being the same as a subcarrier spacing of the serving cell; the subcarrier spacing used by the one or more CSI-RS measurement resources being the same as a subcarrier spacing of the active BWP of the serving cell; a cyclic redundancy prefix used by the one or more CSI-RS measurement resources being the same as a cyclic redundancy prefix of the serving cell; the cyclic redundancy prefix used by the one or more CSI-RS measurement resources being the same as a cyclic redundancy prefix of the active BWP of the serving cell; a starting RB of the one or more CSI-RS measurement resources being the same as a starting RB of the bandwidth of the serving cell; the starting RB of the one or more CSI-RS measurement resources being the same as a starting RB of the active BWP of the serving cell; an ending RB of the one or more CSI-RS measurement resources being the same as an ending RB of the bandwidth of the serving cell; the ending RB of the one or more CSI-RS measurement resources being the same as an ending RB of the active BWP of the serving cell; a center frequency of the one or more CSI-RS measurement resources being the same as a center frequency of the bandwidth of the serving cell; the center frequency of the one or more CSI-RS measurement resources being the same as a center frequency of the active BWP of the serving cell; or the first device supports the CSI-RS measurement without the measurement gap.

[0339] Optionally, the processing unit 602 is further configured to send, through the interface unit 601, second capability information, the second capability information being used to indicate whether the first device supports the CSI-RS measurement without the measurement gap.

[0340] Optionally, the processing unit 602 is further configured to send, through the interface unit 601, a measurement result, the measurement result being obtained according to the CSI-RS measurement of the first CSI-RS measurement resource.

[0341] In another implementation, the communication device 600 is applied to the second device in the embodiment of the application shown in FIG. 4. The specific functions of the processing unit 602 in this implementation are introduced as follows.

[0342] The processing unit 602 is configured to: send, through the interface unit 601, first information, the first information being used for configuring a first CSI-RS measurement resource, the first CSI-RS measurement resource being a CSI-RS measurement resource of a first candidate cell; and receive, through the interface unit 601, a measurement result, the measurement result being obtained by performing CSI-RS measurement according to the first CSI-RS measurement resource.

[0343] Optionally, the processing unit 602 is further configured to: send, through the interface unit 601, second information, the second information being used for determining a manner of performing CSI-RS measurement according to the first CSI-RS measurement resource.

[0344] In some possible manners, the processing unit 602 is further configured to: receive, through the interface unit 601, first capability information, the first capability information being used for indicating a combination of one or more of the following:

[0345] whether the first device supports a first manner in which the first device measures a CSI-RS in a bandwidth of the first CSI-RS measurement resource;

[0346] whether the first device supports a second manner in which the first device measures a CSI-RS in a first overlapping part, the first overlapping part being an overlapping part of the bandwidth of the first CSI-RS measurement resource and a bandwidth of the serving cell;

[0347] whether the first device supports a third manner in which the first device measures a CSI-RS in a second overlapping part, the second overlapping part being an overlapping part of the bandwidth of the first CSI-RS measurement resource and a bandwidth of an active BWP of the serving cell;

[0348] whether the first device supports CSI-RS measurement of the candidate cell based on a physical layer measurement;

[0349] whether the first device supports measurement of a CSI-RS outside the bandwidth of the serving cell; or

[0350] whether the first device supports measurement of a CSI-RS outside the bandwidth of the active BWP of the serving cell.

[0351] Optionally, the processing unit 602 is further configured to: receive, through the interface unit 601, second capability information, the second capability information being used for indicating whether the first device supports CSI-RS measurement without a measurement gap.

[0352] In a possible design, the processing unit 602 can be implemented by one or more processors when the communication apparatus 600 is a communication device or a communication module in a communication device. For example, the processor can include a modem chip, or a system on chip (SoC) chip or a SIP chip including a modem core. The interface unit 601 can be implemented by a transceiver circuit.

[0353] In a possible design, the processing unit 602 can be implemented by circuitry including one or more processors or processor cores in a chip responsible for communication functions in a communication device, such as a modem chip or a system on chip (SoC) chip or a SIP chip including a modem core. The interface unit 601 can be implemented by an interface circuit or a data transceiver circuit on the chip.

[0354] The communication device can be a terminal or an access network device.

[0355] The processing unit 602 and the interface unit 601 can be described in more detail with reference to the related description of the method embodiments shown in FIG. 4, which will not be repeated here.

[0356] It should be noted that the division of modules in the above embodiments is illustrative, and is merely a logical function division. In actual implementation, another division manner can be used. In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or can be physically separated, or two or more units can be integrated in one unit. The integrated unit can be implemented in the form of hardware, or in the form of a software functional unit, or in the form of a combination of hardware and software. Whether a certain function is implemented in hardware or software depends on a specific application and design constraint condition of the technical solution. Those skilled in the art can implement the described functions by using different methods for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0357] For example, the functional units in any of the above apparatuses can be one or more integrated circuits configured to implement the above methods, such as one or more ASICs, one or more CPUs, one or more MCUs, one or more DSPs, or one or more FPGAs, or a combination of at least two of these integrated circuit forms.

[0358] The integrated unit described above, if realized in the form of a software function unit and sold or used as an independent product, can be stored in a computer-readable storage medium. Based on such an understanding, the technical solutions of the present application essentially or the part of the prior art that contributes to the present application or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0359] In a possible implementation, the communication apparatus provided by the embodiments of the present application is shown in FIG. 7, and the communication apparatus 700 includes a processor 702. Optionally, the communication apparatus 700 further includes an interface circuit 701 and a memory 703. The interface circuit 701, the processor 702, and the memory 703 are coupled with each other.

[0360] Optionally, the interface circuit 701, the processor 702, and the memory 703 are coupled with each other through a bus 704. The bus 704 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one thick line is shown in FIG. 7, but it does not mean that there is only one bus or only one type of bus.

[0361] The interface circuit 701 is configured to input and / or output information. The input information can be replaced by received information, and the output information can be replaced by transmitted information. When the output information is output, the interface circuit 701 can output the information to other devices outside the communication apparatus 700, or output the information to other units in the communication apparatus 700. For example, the interface circuit 701 can be implemented by at least one of a physical interface, a communication module, a communication interface, an input / output interface, and a mobile communication module. The mobile communication module can include one or more of at least one antenna, at least one filter, a switch, a power amplifier, an LNA, etc. The interface circuit 701 is configured to perform the receiving operation and the transmitting operation in the above method embodiments.

[0362] The interface circuit 701 can be one of a transceiver, a transceiving circuit, a communication circuit, an interface, a communication interface, or an input / output interface (for example, an input / output interface of a chip). The interface circuit 701 can include an input interface circuit and an output interface circuit for inputting and outputting information respectively. The input interface circuit is configured to perform the receiving operation in the above method embodiments. The output interface circuit is configured to perform the sending operation in the above method embodiments.

[0363] The transceiver can be configured to communicate with other communication devices. For example, the communication device 700 is a terminal, and the transceiver can be configured to communicate with an access network device or another terminal. For another example, the communication device 700 is an access network device, and the transceiver can be configured to communicate with a terminal or another access network device.

[0364] Optionally, the transceiver can include a receiver and / or a transmitter. The receiver is configured to perform the receiving operation in the above method embodiments. The transmitter is configured to perform the sending operation in the above method embodiments.

[0365] Optionally, the transceiver can be integrated with the processor 702 or exist independently and be coupled with the processor 702 through the interface circuit of the communication device 700, and the embodiments of the present application do not make a specific limitation in this regard.

[0366] The processor 702 can be configured to support the communication device 700 to perform the processing actions in the above method embodiments. When the communication device 700 is configured to implement the above method embodiments, the processor 702 can also be configured to implement the functions of the processing unit 602 described above. The processor 702 can be a CPU, and can also be other general-purpose processors, DSPs, ASICs, FPGAs, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general-purpose processor can be a microprocessor, or any conventional processor. The processor 702 is configured to perform operations related to processing in the above method embodiments, for example, operations other than the receiving operation and the sending operation in the above method embodiments.

[0367] In an embodiment, the communication device 700 is applied to the first device in the embodiments of the present application shown in FIG. 4. The specific functions of the processor 702 in this embodiment are described below.

[0368] The processor 702 is configured to: receive first information through the interface circuit 701, the first information being used for configuring a first CSI-RS measurement resource, the first CSI-RS measurement resource being a CSI-RS measurement resource of a first candidate cell; and perform CSI-RS measurement according to the first CSI-RS measurement resource.

[0369] In another embodiment, the communication apparatus 700 is applied to the second device in the embodiments of the present application shown in FIG. 4. The specific functions of the processor 702 in this embodiment are described as follows.

[0370] The processor 702 is configured to send, through the interface circuit 701, first information, the first information being used for configuring first CSI-RS measurement resources, the first CSI-RS measurement resources being CSI-RS measurement resources of the first candidate cell; and receive, through the interface circuit 701, measurement results, the measurement results being obtained by performing CSI-RS measurement according to the first CSI-RS measurement resources.

[0371] The specific functions of the processor 702 can refer to the description of the communication method provided in the embodiments of the present application and the examples, and the description of the specific functions of the communication apparatus 600 in the embodiments of the present application shown in FIG. 6, which will not be repeated here.

[0372] The memory 703 is configured to store program instructions and / or data, etc. Specifically, the program instructions can include program codes including computer operation instructions. The memory 703 can include RAM, and can also include non-volatile memory such as at least one disk memory. The processor 702 executes the program instructions stored in the memory 703, and uses the data stored in the memory 703, to realize the above functions, thereby realizing the communication method provided in the above embodiments of the present application. The memory 703 can be integrated with the processor 702, or can be a memory outside the communication apparatus.

[0373] It is to be understood that the memory 703 in FIG. 7 of the present application can be a volatile memory or a nonvolatile memory, or can include both volatile and nonvolatile memory. The nonvolatile memory can be a ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically EPROM (EEPROM), or a flash memory. The volatile memory can be a RAM used as external cache memory. By way of example, and not limitation, a RAM can be used as the volatile memory, such as a static RAM (SRAM), a dynamic RAM (DRAM), a synchronous DRAM (SDRAM), a double data rate SDRAM (DDR SDRAM), an enhanced SDRAM (ESDRAM), a synchlink DRAM (SLDRAM), and a direct rambus RAM (DR RAM). It is to be noted that the system and method described herein are intended to include, among other things, a memory that is a combination of both volatile and nonvolatile memory.

[0374] The present application also provides a communication apparatus 800, which can be a terminal, a processor in the terminal, or a chip. The communication apparatus 800 can be used to perform operations performed by the first apparatus in the above method embodiments.

[0375] When the communication apparatus 800 is a terminal, FIG. 8 shows a structural schematic diagram of a terminal. As shown in FIG. 8, the terminal includes a processor, a memory, and a transceiver. The memory can store computer program codes, and the transceiver includes a transmitter 831, a receiver 832, a radio frequency circuit (not shown in the figure), an antenna 833, and an input and output device (not shown in the figure).

[0376] The processor is mainly used for processing communication protocols and communication data, controlling the terminal, executing software programs, and processing data of the software programs, etc.

[0377] The memory is mainly used for storing software programs and data.

[0378] The radio frequency circuit is mainly used for conversion between baseband signals and radio frequency signals, and processing of the radio frequency signals.

[0379] The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves.

[0380] The input and output device can include a touch screen, a display screen, or a keyboard, etc. The input and output device is mainly used for receiving data input by a user and outputting data to the user. It should be noted that some types of terminals can not have an input and output device.

[0381] When data needs to be sent, the processor performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit. Then, the radio frequency circuit performs radio frequency processing on the baseband signal, and then sends the radio frequency signal in the form of electromagnetic waves through the antenna. When data is sent to the terminal, the radio frequency circuit receives the radio frequency signal through the antenna. The radio frequency circuit converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor. The processor converts the baseband signal into data and processes the data.

[0382] For ease of illustration, only one memory, one processor and one transceiver are shown in FIG. 8. In actual terminal products, there can be one or more processors and one or more memories. The memory can also be referred to as a storage medium or a storage device, etc. The memory can be independent of the processor or integrated with the processor, and the embodiments of the present application do not limit this.

[0383] In the embodiments of the present application, the antenna and the radio frequency circuit with transceiving function can be regarded as the interface unit of the terminal, and the processor with processing function can be regarded as the processing unit of the terminal.

[0384] As shown in FIG. 8, the terminal includes a processor 810, a memory 820 and a transceiver 830. The processor 810 can also be referred to as a processing board, a processing module, or a processing device, etc. The transceiver 830 can also be referred to as an interface circuit, a transceiver, or a transceiving device, etc. The processor 810 is configured to perform the processing operation of the first device side in the above method embodiments. The transceiver 830 is configured to perform the transceiving operation of the first device side in the above method embodiments.

[0385] Optionally, the device for realizing the receiving function in the transceiver 830 is regarded as a receiver, and the device for realizing the sending function in the transceiver 830 is regarded as a transmitter, that is, the transceiver 830 includes a receiver 832 and a transmitter 831. The receiver can also be referred to as a receiver, a receiving module, or a receiving circuit, etc. The transmitter can also be referred to as a transmitter, a transmitter, a transmitting module, or a transmitting circuit, etc. The receiver is configured to perform the receiving operation of the first device side in the above method embodiments. The transmitter is configured to perform the sending operation of the first device side in the above method embodiments.

[0386] It should be understood that FIG. 8 is only an example and not a limitation, and the terminal can not depend on the structure shown in FIG. 8.

[0387] When the communication apparatus 800 is a chip, the chip includes a processor and a transceiver. The transceiver can be an input / output circuit or a communication interface. The processor can be an integrated processing module on the chip or a microprocessor or an integrated circuit. The sending operation of the first device in the method embodiments can be understood as the output of the chip, and the receiving operation of the first device in the method embodiments can be understood as the input of the chip.

[0388] The communication apparatus 800 can further include a memory. The memory can be a memory built in the chip or an external memory.

[0389] The present application further provides a communication apparatus 900. The communication apparatus 900 can be an access network device or a chip. The communication apparatus 900 can be used to perform the operations performed by the second device in the method embodiments.

[0390] When the communication apparatus 900 is an access network device, for example, a base station. FIG. 9 shows a structural schematic diagram of an access network device. The access network device includes a 910 part, a 920 part, and a 930 part.

[0391] The 910 part is mainly used for baseband processing, controlling the access network device, etc. The 910 part is usually the control center of the base station, which can be usually referred to as a processor, and is used to control the access network device to perform the processing operations of the second device in the method embodiments.

[0392] The 920 part is mainly used for storing computer program codes and data.

[0393] The 930 part is mainly used for the transceiving of radio frequency signals and the conversion between radio frequency signals and baseband signals. The 930 part can be usually referred to as a transceiving module, a transceiver, a transceiving circuit, an interface circuit, or a transceiver, etc. The 930 part can include an antenna 933 and a radio frequency circuit (not shown in the figure), wherein the radio frequency circuit is mainly used for radio frequency processing. The 930 part can be used to perform the transceiving operations of the second device in the method embodiments.

[0394] Optionally, the devices in the 930 part used for realizing the receiving function can be regarded as a receiver, and the devices used for realizing the sending function can be regarded as a transmitter, that is, the 930 part includes a receiver 932 and a transmitter 931. The receiver can also be referred to as a receiving module, a receiver, or a receiving circuit, etc. The transmitter can be referred to as a transmitting module, a transmitter, or a transmitting circuit, etc. The receiver is used to perform the receiving operations of the second device in the method embodiments. The transmitter is used to perform the sending operations of the second device in the method embodiments.

[0395] The 910 part and the 920 part can include one or more single boards, each of which can include one or more processors and one or more memories. The processors are used to read and execute programs in the memories to realize baseband processing functions and control of the access network device. If there are multiple single boards, the single boards can be interconnected to enhance processing capability. As an optional implementation, multiple single boards can also share one or more processors, or multiple single boards can share one or more memories, or multiple single boards can share one or more processors at the same time.

[0396] It should be understood that FIG. 9 is merely an example and is not limiting, and the access network device can not depend on the structure shown in FIG. 9.

[0397] When the communication apparatus 900 is a chip, the chip includes a transceiver and a processor. The transceiver can be an input / output circuit, a communication interface; the processor is a processor integrated on the chip, or a microprocessor, or an integrated circuit. The sending operation of the second device in the method embodiments can be understood as the output of the chip, and the receiving operation of the second device in the method embodiments can be understood as the input of the chip.

[0398] The communication apparatus 900 can also include a memory, which can be a memory built into the chip or an external memory.

[0399] Based on the above embodiments, the embodiments of the present application further provide a computer program product including computer executable instructions, when the computer program product is executed, the method provided in the above embodiments is executed.

[0400] Based on the above embodiments, the embodiments of the present application further provide a computer readable storage medium, the computer readable storage medium stores a computer program, when the computer program is executed by a computer, the computer executes the method provided in the above embodiments.

[0401] The storage medium can be any available medium that can be accessed by a computer. For example, but not limited to: the computer readable medium can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer.

[0402] Based on the above embodiments, the embodiments of the present application further provide a chip for reading a computer program stored in a memory to realize the method provided in the above embodiments.

[0403] Based on the above embodiments, the embodiments of the present application provide a chip system, which comprises a processor for supporting a computer device to realize the functions related to the devices in the above embodiments. In a possible design, the chip system further comprises a memory for storing necessary programs and data of the computer device. The chip system can be composed of a chip, or can include a chip and other discrete devices.

[0404] In each of the embodiments of the present application, the terms and / or descriptions in different embodiments are consistent and can be referred to each other if there is no special description and logical conflict. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0405] The present application is described with reference to the flowcharts and / or block diagrams of the method, device (system) and computer program product according to the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of the flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for implementing the functions specified in one or more flows in the flowcharts and / or one or more blocks in the block diagrams.

[0406] These computer program instructions can also be stored in a computer readable memory capable of guiding the computer or other programmable data processing device to work in a specific way, so that the instructions stored in the computer readable memory produce a product including instruction devices, which implement the functions specified in one or more flows in the flowcharts and / or one or more blocks in the block diagrams.

[0407] These computer program instructions can also be loaded into a computer or other programmable data processing device, so that a series of operation steps are performed on the computer or other programmable device to produce a computer implemented process, so that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more flows in the flowcharts and / or one or more blocks in the block diagrams.

[0408] In this application, the terms "system" and "network" can be interchangeably used. "At least one" means one or more, and "multiple" means two or more. "And / or" describes an associated relationship with the associated object, which means that there can be three relationships, for example, A and / or B, which can represent: A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural. "At least one" or similar expressions refer to any combination of these items, including any combination of single or multiple items. In the textual description of the present application, the character " / ", generally indicates that the associated objects before and after are in an "or" relationship.

[0409] It can be understood that various numerical numbers involved in the embodiments of the present application are only for convenient differentiation, and are not used to limit the scope of the embodiments of the present application. The size of the serial number of the above processes does not mean the order of execution, and the execution order of the processes should be determined according to its function and inherent logic.

[0410] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A communication method characterized by comprising: Applicable to a first device, comprising: receiving first information, the first information being used for configuring a first channel state information reference signal, CSI-RS, measurement resource, the first CSI-RS measurement resource being a CSI-RS measurement resource of a first candidate cell; performing CSI-RS measurement according to the first CSI-RS measurement resource.

2. The method of claim 1, wherein, The CSI-RS measurement according to the first CSI-RS measurement resource comprises one or more combinations of the following: measuring CSI-RS in a bandwidth of the first CSI-RS measurement resource; measuring CSI-RS in a first overlapping part, the first overlapping part being an overlapping part of the bandwidth of the first CSI-RS measurement resource and a bandwidth of a serving cell; or measuring CSI-RS in a second overlapping part, the second overlapping part being an overlapping part of the bandwidth of the first CSI-RS measurement resource and a bandwidth of an active bandwidth part, BWP, of the serving cell.

3. The method of claim 2, wherein, Further comprising: receiving second information, the second information being used for determining a manner of performing CSI-RS measurement according to the first CSI-RS measurement resource.

4. The method of claim 2 or 3, wherein, Further comprising: sending first capability information, the first capability information being used for indicating one or more combinations of the following: whether the first device supports a first manner in which the first device measures CSI-RS in a bandwidth of the first CSI-RS measurement resource; whether the first device supports a second manner in which the first device measures CSI-RS in the first overlapping part; whether the first device supports a third manner in which the first device measures CSI-RS in the second overlapping part; whether the first device supports measuring CSI-RS of a candidate cell based on physical layer measurement; whether the first device supports measuring CSI-RS outside a bandwidth of a serving cell; or whether the first device supports measuring CSI-RS outside a bandwidth of an active BWP of the serving cell.

5. The method of claim 4, wherein, In a case where the first device does not support measuring CSI-RS outside the bandwidth of the serving cell, measuring CSI-RS in the first overlapping part; and / or, In a case where the first device supports measuring CSI-RS outside the bandwidth of the serving cell, measuring CSI-RS in the bandwidth of the first CSI-RS measurement resource.

6. The method of claim 4, wherein, In a case where the first device does not support measuring CSI-RS outside the bandwidth of the active BWP of the serving cell, measuring CSI-RS in the second overlapping part; and / or, In a case where the first device supports measuring CSI-RS outside the bandwidth of the active BWP of the serving cell, measuring CSI-RS in the bandwidth of the first CSI-RS measurement resource, or measuring CSI-RS in the first overlapping part.

7. The method according to any one of claims 2 to 6, characterized in that, The CSI-RS measurement according to the first CSI-RS measurement resource comprises at least one of the following: if the way of performing CSI-RS measurement according to the first CSI-RS measurement resource is to measure CSI-RS in the first overlapping part and the bandwidth of the first overlapping part is smaller than a first bandwidth threshold, then one of the following operations is performed: no measurement is performed on the first CSI-RS measurement resource, CSI-RS in the bandwidth of the first CSI-RS measurement resource is measured, or CSI-RS in the first overlapping part is measured; if the way of performing CSI-RS measurement according to the first CSI-RS measurement resource is to measure CSI-RS in the first overlapping part and the bandwidth of the first overlapping part is 0, then one of the following operations is performed: no measurement is performed on the first CSI-RS measurement resource, CSI-RS in the bandwidth of the first CSI-RS measurement resource is measured, or CSI-RS in the first overlapping part is measured; if the way of performing CSI-RS measurement according to the first CSI-RS measurement resource is to measure CSI-RS in the second overlapping part and the bandwidth of the second overlapping part is smaller than a second bandwidth threshold, then one of the following operations is performed: no measurement is performed on the first CSI-RS measurement resource, CSI-RS in the bandwidth of the first CSI-RS measurement resource is measured, or CSI-RS in the first overlapping part is measured; or if the way of performing CSI-RS measurement according to the first CSI-RS measurement resource is to measure CSI-RS in the second overlapping part and the bandwidth of the second overlapping part is 0, then one of the following operations is performed: no measurement is performed on the first CSI-RS measurement resource, CSI-RS in the bandwidth of the first CSI-RS measurement resource is measured, or CSI-RS in the first overlapping part is measured.

8. The method according to any one of claims 1 to 7, characterized in that, performing CSI-RS measurement according to the first CSI-RS measurement resource comprises: in a case where a first condition is met, performing CSI-RS measurement without measurement gap according to the first CSI-RS measurement resource; wherein the first condition comprises one or more of the following in combination: an actual measurement bandwidth corresponding to the first CSI-RS measurement resource is contained in a bandwidth of a serving cell; the actual measurement bandwidth corresponding to the first CSI-RS measurement resource is contained in a bandwidth of an active BWP of the serving cell; a subcarrier spacing adopted by the first CSI-RS measurement resource is the same as a subcarrier spacing of the serving cell; the subcarrier spacing adopted by the first CSI-RS measurement resource is the same as a subcarrier spacing of the active BWP of the serving cell; a cyclic redundancy check prefix adopted by the first CSI-RS measurement resource is the same as a cyclic redundancy check prefix of the serving cell; the cyclic redundancy check prefix adopted by the first CSI-RS measurement resource is the same as a cyclic redundancy check prefix of the active BWP of the serving cell; a starting resource block (RB) of the first CSI-RS measurement resource is the same as a starting RB of the bandwidth of the serving cell; the starting RB of the first CSI-RS measurement resource is the same as a starting RB of the active BWP of the serving cell; a start RB of the first CSI-RS measurement resource is same as a start RB of the bandwidth of the serving cell; a start RB of the first CSI-RS measurement resource is same as a start RB of the active BWP of the serving cell; a center frequency of the first CSI-RS measurement resource is same as a center frequency of the bandwidth of the serving cell; a center frequency of the first CSI-RS measurement resource is same as a center frequency of the active BWP of the serving cell; or the first device supports the CSI-RS measurement without the measurement gap.

9. The method according to any one of claims 1 to 7, wherein, the first information is used for configuring at least one CSI-RS measurement resource of the first candidate cell, the at least one CSI-RS measurement resource comprises the first CSI-RS measurement resource, in a case where a second condition is met, performing the CSI-RS measurement without the measurement gap according to the at least one CSI-RS measurement resource; wherein the second condition comprises one or more of the following in combination: an actual measurement bandwidth corresponding to the at least one CSI-RS measurement resource is contained in the bandwidth of the serving cell; an actual measurement bandwidth corresponding to the at least one CSI-RS measurement resource is contained in the bandwidth of the active BWP of the serving cell; a subcarrier spacing adopted by the at least one CSI-RS measurement resource is same as a subcarrier spacing of the serving cell; a subcarrier spacing adopted by the at least one CSI-RS measurement resource is same as a subcarrier spacing of the active BWP of the serving cell; a cyclic redundancy check adopted by the at least one CSI-RS measurement resource is same as a cyclic redundancy check of the serving cell; a cyclic redundancy check adopted by the at least one CSI-RS measurement resource is same as a cyclic redundancy check of the active BWP of the serving cell; a start RB of the at least one CSI-RS measurement resource is same as a start RB of the bandwidth of the serving cell; a start RB of the at least one CSI-RS measurement resource is same as a start RB of the active BWP of the serving cell; an end RB of the at least one CSI-RS measurement resource is same as an end RB of the bandwidth of the serving cell; an end RB of the at least one CSI-RS measurement resource is same as an end RB of the active BWP of the serving cell; a center frequency of the at least one CSI-RS measurement resource is same as a center frequency of the bandwidth of the serving cell; a center frequency of the at least one CSI-RS measurement resource is same as a center frequency of the active BWP of the serving cell; or the first device supports the CSI-RS measurement without the measurement gap.

10. The method according to any one of claims 1 to 7, wherein the first information is used for configuring one or more CSI-RS measurement resources, the one or more CSI-RS measurement resources are CSI-RS measurement resources of at least one candidate cell, the at least one candidate cell comprises the first candidate cell, the one or more CSI-RS measurement resources comprise the first CSI-RS measurement resource, in a case where a third condition is met, performing the CSI-RS measurement without the measurement gap according to the one or more CSI-RS measurement resources; The third condition comprises one or more of the following in combination: The actual measurement bandwidth corresponding to the one or more CSI-RS measurement resources is contained in the bandwidth of the serving cell; The actual measurement bandwidth corresponding to the one or more CSI-RS measurement resources is contained in the bandwidth of the active BWP of the serving cell; The subcarrier spacing adopted by the one or more CSI-RS measurement resources is the same as the subcarrier spacing of the serving cell; The subcarrier spacing adopted by the one or more CSI-RS measurement resources is the same as the subcarrier spacing of the active BWP of the serving cell; The cyclic redundancy prefix adopted by the one or more CSI-RS measurement resources is the same as the cyclic redundancy prefix of the serving cell; The cyclic redundancy prefix adopted by the one or more CSI-RS measurement resources is the same as the cyclic redundancy prefix of the active BWP of the serving cell; The starting RB of the one or more CSI-RS measurement resources is the same as the starting RB of the bandwidth of the serving cell; The starting RB of the one or more CSI-RS measurement resources is the same as the starting RB of the active BWP of the serving cell; The stop RB of the one or more CSI-RS measurement resources is the same as the stop RB of the bandwidth of the serving cell; The stop RB of the one or more CSI-RS measurement resources is the same as the stop RB of the active BWP of the serving cell; The center frequency of the one or more CSI-RS measurement resources is the same as the center frequency of the bandwidth of the serving cell; The center frequency of the one or more CSI-RS measurement resources is the same as the center frequency of the active BWP of the serving cell; or The first device supports CSI-RS measurement without measurement gap.

11. The method according to any one of claims 8 to 10, characterized in that, Further comprising: Sending second capability information, the second capability information is used to indicate whether the first device supports CSI-RS measurement without measurement gap.

12. The method of any one of claims 1 to 11, wherein, Further comprising: Sending measurement results, the measurement results are obtained by performing CSI-RS measurement according to the first CSI-RS measurement resource.

13. A communication method, comprising: Applied to a second device, comprising: Sending first information, the first information is used to configure first channel state information reference signal CSI-RS measurement resources, the first CSI-RS measurement resource is the CSI-RS measurement resource of the first candidate cell; Receiving measurement results, the measurement results are obtained by performing CSI-RS measurement according to the first CSI-RS measurement resource.

14. The method of claim 13, wherein, Further comprising: Sending second information, the second information is used to determine the way of performing CSI-RS measurement according to the first CSI-RS measurement resource.

15. The method of claim 13 or 14, wherein, Further comprising: Receiving first capability information, the first capability information is used to indicate one or more of the following in combination: Whether the first device supports a first way in which the first device measures CSI-RS in the bandwidth of the first CSI-RS measurement resource; whether the first device supports a second mode in which the first device measures the CSI-RS in a first overlapping part, the first overlapping part being an overlapping part of a bandwidth of the first CSI-RS measurement resource and a bandwidth of the serving cell; whether the first device supports a third mode in which the first device measures the CSI-RS in a second overlapping part, the second overlapping part being an overlapping part of the bandwidth of the first CSI-RS measurement resource and a bandwidth of an active bandwidth part, BWP, of the serving cell; whether the first device supports CSI-RS measurement of a candidate cell based on physical layer measurement; whether the first device supports measurement of the CSI-RS outside the bandwidth of the serving cell; or whether the first device supports measurement of the CSI-RS outside the bandwidth of the active BWP of the serving cell.

16. The method according to any one of claims 13 to 15, characterized in that, Further comprising: receiving second capability information, the second capability information indicating whether the first device supports CSI-RS measurement without measurement gaps.

17. A communications device, characterized by comprising means for performing the method of any of claims 1-16.

18. A communications device, characterized by comprising a processor configured to execute computer program or instructions to cause the apparatus to perform the method of any of claims 1-16.

19. A computer-readable storage medium, characterized in that, The computer readable storage medium has stored therein computer programs or instructions which, when executed, implement the method of any of claims 1-16.

20. A computer program product, characterised in that, The computer program product comprises computer program code which, when executed, implements the method of any of claims 1-16.

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