Channel measurement method and communication device

Abstract

The invention provides a channel measurement method and a communication device, which can improve the accuracy of a channel measurement result and can be applied to a communication system. The method comprises: a terminal device receiving first information for indicating a channel state information reference signal (CSI-RS) resource occupied by a CSI-RS, receiving the CSI-RS on the CSI-RS resource, and sending the CSI. Wherein the CSI-RS resources occupied by the CSI-RS satisfy one or more of the following items: the first CSI-RS resources of the plurality of orthogonal codes corresponding to the occupied RB set are included. Or the starting time domain position corresponding to the RB where the CSI-RS is located comprises the second CSI-RS resource of the starting time domain positions in the first set and the second set. Or, a plurality of CSI-RS resources are included. Or, different port sets correspond to third CSI-RS resources of different RB sets.

Description

Technical Field

[0001] The present application relates to the field of communications, and in particular to a channel measurement method and a communication device. Background Art

[0002] In the existing related technologies, the channel state information-resource port (CSI-RSP) configuration can support up to 32 antenna port solutions. For communication systems with larger antennas, such as 64, 128, or 256 transmitting antennas, the terminal device cannot obtain the channel state information of the complete spatial dimension due to the limited number of configurable antenna ports, which will lead to the problem of low accuracy of the channel measurement results. Summary of the invention

[0003] The embodiments of the present application provide a channel measurement method and a communication device, which can solve the problem of incomplete channel state information in the spatial dimension, thereby improving the accuracy of the channel measurement results.

[0004] In order to achieve the above objectives, this application adopts the following technical solutions:

[0005] In a first aspect, a channel measurement method is provided. The channel measurement method includes: a terminal device receives first information from a network device. Wherein, the first information is used to indicate the CSI-RS resources occupied by the channel state information reference signal CSI-RS. Wherein, the CSI-RS resources occupied by the CSI-RS meet one or more of the following: the CSI-RS resources occupied by the CSI-RS include the first CSI-RS resources, and the resource block RB set occupied by the first CSI-RS resource corresponds to multiple orthogonal codes. Or, the CSI-RS resources occupied by the CSI-RS include the second CSI-RS resources, and the starting time domain position corresponding to the RB where the CSI-RS is located in the second CSI-RS resource includes the starting time domain position in the first set and the starting time domain position in the second set, and the first set and the second set both include at least one starting time domain position, and any starting time domain position in the second set is different from the starting time domain position in the first set. Or, the CSI-RS resources occupied by the CSI-RS include multiple CSI-RS resources. Or, the CSI-RS resources occupied by the CSI-RS include the third CSI-RS resources, and different port sets of the third CSI-RS resources correspond to different RB sets. The terminal device receives the CSI-RS from the network device on the CSI-RS resource occupied by the CSI-RS. The terminal device sends the channel state information CSI to the network device. The CSI is obtained according to the CSI-RS measurement.

[0006] Based on the channel measurement method provided in the first aspect, the terminal device can receive the first information, receive the CSI-RS according to the CSI-RS resources occupied by the CSI-RS indicated by the first information, and perform channel measurement. Among them, the CSI-RS resources occupied by the CSI-RS are the first CSI-RS resources, the first CSI-RS resources correspond to multiple orthogonal codes, and / or the CSI-RS resources occupied by the CSI-RS are the second CSI-RS resources, the starting time domain position of the second CSI-RS resources includes the starting time domain positions in the first set and the second set, and / or the CSI-RS occupies multiple CSI-RS resources, and / or the CSI-RS resources occupied by the CSI-RS are the third CSI-RS resources, and different port sets in the third CSI-RS resources correspond to different RBs. In this way, the total number of ports corresponding to the CSI-RS resources occupied by the CSI-RS can be increased to obtain more complete channel state information in the spatial dimension, thereby improving the accuracy of the channel measurement results.

[0007] In a possible design scheme, the first information includes multiple orthogonal codes corresponding to the RB set occupied by the first CSI-RS resource, so as to distinguish multiple groups of port sets through multiple orthogonal code pairs, thereby improving resource utilization.

[0008] In one possible design scheme, the number of starting time domain positions in the first set and the number of starting time domain positions in the second set are related to one or more of the following: the number of CSI-RS ports in the second CSI-RS resource, the code division multiplexing CDM type of the CSI-RS in the second CSI-RS resource, or the number of starting frequency domain positions of the CDM group corresponding to the RB where the CSI-RS is located in the second CSI-RS resource.

[0009] In a possible design, the number of CSI-RS ports in the second CSI-RS resource is 48, the CDM type of the CSI-RS in the second CSI-RS resource is 2 ports multiplexed on 2 resource units RE, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1 and frequency domain unit k2, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3. In this way, the time domain position corresponding to the CSI-RS resource occupied by the CSI-RS can be doubled, thereby indicating 48 ports of CSI-RS resources.

[0010] In a possible design, the number of CSI-RS ports in the second CSI-RS resource is 48, the CDM type of CSI-RS in the second CSI-RS resource is 4 ports multiplexed on a total of 4 REs corresponding to 2 frequency domain units and 2 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the second CSI-RS resource includes frequency domain unit k0, frequency domain unit k1 and frequency domain unit k2, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3. In this way, the time domain position corresponding to the CSI-RS resource occupied by the CSI-RS can be doubled, thereby indicating 48-port CSI-RS resources.

[0011] In a possible design, the number of CSI-RS ports in the second CSI-RS resource is 48, the CDM type of CSI-RS in the second CSI-RS resource is 8 ports multiplexed on a total of 8 REs corresponding to 2 frequency domain units and 4 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the second CSI-RS resource includes frequency domain unit k0, frequency domain unit k1 and frequency domain unit k2, the starting time domain position of the first set includes time domain unit l0, and the starting time domain position of the second set includes time domain unit l1. In this way, the time domain position corresponding to the CSI-RS resource occupied by the CSI-RS can be doubled, thereby indicating 48-port CSI-RS resources.

[0012] In a possible design, the number of CSI-RS ports in the second CSI-RS resource is 64, the CDM type of the CSI-RS in the second CSI-RS resource is 2 ports multiplexed on 2 REs, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1, frequency domain unit k2 and frequency domain unit k3, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3. In this way, the time domain position corresponding to the CSI-RS resource occupied by the CSI-RS can be doubled, thereby indicating 64-port CSI-RS resources.

[0013] In a possible design, the number of CSI-RS ports in the second CSI-RS resource is 64, the CDM type of CSI-RS in the second CSI-RS resource is 4 ports multiplexed on a total of 4 REs corresponding to 2 frequency domain units and 2 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1, frequency domain unit k2 and frequency domain unit k3, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3. The time domain position corresponding to the CSI-RS resource occupied by the CSI-RS can be doubled, thereby indicating a CSI-RS resource with 64 ports.

[0014] In a possible design, the number of CSI-RS ports in the second CSI-RS resource is 64, the CDM type of CSI-RS in the second CSI-RS resource is 8 ports multiplexed on a total of 8 REs corresponding to 2 frequency domain units and 4 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the second CSI-RS resource includes frequency domain unit k0, frequency domain unit k1, frequency domain unit k2 and frequency domain unit k3, the starting time domain position of the first set includes time domain unit l0, and the starting time domain position of the second set includes time domain unit l1. The time domain position corresponding to the CSI-RS resource occupied by the CSI-RS can be doubled, thereby indicating a CSI-RS resource with 64 ports.

[0015] In a possible design, the frequency domain density of the third CSI-RS resource is less than or equal to the first density threshold, so that the same number of CSI-RS ports occupy fewer frequency domain resources and reduce CSI-RS pilot overhead.

[0016] Optionally, the first density threshold is 0.5.

[0017] Optionally, the first information is further used to indicate that the same port of the third CSI-RS resource corresponds to different RBs in two adjacent CSI-RS measurements. In this way, the overhead can be reduced.

[0018] Furthermore, on the third CSI-RS resource, the RB corresponding to port p in the kth CSI-RS measurement satisfies the following relationship: P(k,p)=(P(0,p)+k)mod N. Where p represents the port 口 Index, k is the kth measurement, P(0,p) represents the end 口p is the starting frequency domain index in the initial CSI-RS measurement, P(k,p) is the frequency domain index of port p in the k-th CSI-RS measurement, N represents a parameter determined according to the frequency domain density of the third CSI-RS resource, and k is a positive integer greater than or equal to 1.

[0019] Furthermore, the first information is also used to indicate that the RBs corresponding to two adjacent CSI-RS measurements of the same port of the third CSI-RS resource are discontinuous. In this way, CSI-RSs of more RB numbers can be measured for the same port, thereby further improving the accuracy of the channel measurement result.

[0020] Furthermore, the first information is also used to indicate the number of RBs between RBs occupied by the same port of the third CSI-RS resource in two adjacent CSI-RS measurements. In this way, CSI-RS on more and discontinuous RBs can be measured for the same port, and the accuracy of the channel measurement result can be further improved under the frequency-selective channel.

[0021] In one possible design scheme, the first information includes one or more of the following items for each CSI-RS resource in the CSI-RS resources occupied by the CSI-RS: the number of ports corresponding to the RB where the CSI-RS resource is located, the CDM type of the CSI-RS in the CSI-RS resource, the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, so as to indicate the information of the CSI-RS resources occupied by the CSI-RS.

[0022] In a second aspect, a channel measurement method is provided. The channel measurement method includes: a network device sends first information to a terminal device. Among them, the first information is used to indicate the CSI-RS resources occupied by the channel state information reference signal CSI-RS. Among them, the CSI-RS resources occupied by the CSI-RS meet one or more of the following: the CSI-RS resources occupied by the CSI-RS include the first CSI-RS resources, and the resource block RB set occupied by the first CSI-RS resource corresponds to multiple orthogonal codes. Or, the CSI-RS resources occupied by the CSI-RS include the second CSI-RS resources, and the starting time domain position corresponding to the RB where the CSI-RS is located in the second CSI-RS resource includes the starting time domain position in the first set and the starting time domain position in the second set, and the first set and the second set both include at least one starting time domain position, and any starting time domain position in the second set is different from the starting time domain position in the first set. Or, the CSI-RS resources occupied by the CSI-RS include multiple CSI-RS resources. Or, the CSI-RS resources occupied by the CSI-RS include the third CSI-RS resources, and different port sets of the third CSI-RS resources correspond to different RB sets. The network device sends a CSI-RS to the terminal device on the CSI-RS resource occupied by the CSI-RS. The network device receives channel state information CSI from the terminal device. The CSI is obtained according to CSI-RS measurement.

[0023] In a possible design scheme, the first information includes multiple orthogonal codes corresponding to the RB set occupied by the first CSI-RS resource.

[0024] In one possible design scheme, the number of starting time domain positions in the first set and the number of starting time domain positions in the second set are related to one or more of the following: the number of CSI-RS ports in the second CSI-RS resource, the code division multiplexing CDM type of the CSI-RS in the second CSI-RS resource, or the number of starting frequency domain positions of the CDM group corresponding to the RB where the CSI-RS is located in the second CSI-RS resource.

[0025] In one possible design scheme, the number of CSI-RS ports in the second CSI-RS resource is 48, the CDM type of the CSI-RS in the second CSI-RS resource is 2 ports multiplexed on 2 resource units RE, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1 and frequency domain unit k2, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

[0026] In one possible design scheme, the number of CSI-RS ports in the second CSI-RS resource is 48, the CDM type of the CSI-RS in the second CSI-RS resource is 4 ports multiplexed on a total of 4 REs corresponding to 2 frequency domain units and 2 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1 and frequency domain unit k2, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

[0027] In one possible design scheme, the number of CSI-RS ports in the second CSI-RS resource is 48, the CDM type of the CSI-RS in the second CSI-RS resource is 8 ports multiplexed on a total of 8 REs corresponding to 2 frequency domain units and 4 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1 and frequency domain unit k2, the starting time domain position of the first set includes time domain unit l0, and the starting time domain position of the second set includes time domain unit l1.

[0028] In a possible design scheme, the number of CSI-RS ports in the second CSI-RS resource is 64, the CDM type of the CSI-RS in the second CSI-RS resource is 2 ports multiplexed on 2 REs, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1, frequency domain unit k2 and resource unit k3, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

[0029] In one possible design scheme, the number of CSI-RS ports in the second CSI-RS resource is 64, the CDM type of the CSI-RS in the second CSI-RS resource is 4 ports multiplexed on a total of 4 REs corresponding to 2 frequency domain units and 2 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1, frequency domain unit k2 and frequency domain unit k3, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

[0030] In one possible design scheme, the number of CSI-RS ports in the second CSI-RS resource is 64, the CDM type of the CSI-RS in the second CSI-RS resource is 8 ports multiplexed on a total of 8 REs corresponding to 2 frequency domain units and 4 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1, frequency domain unit k2 and frequency domain unit k3, the starting time domain position of the first set includes time domain unit l0, and the starting time domain position of the second set includes time domain unit l1.

[0031] In one possible design, the frequency domain density of the third CSI-RS resource CSI-RS is less than or equal to the first density threshold, so that the same number of CSI-RS ports occupy fewer frequency domain resources and reduce CSI-RS pilot overhead.

[0032] Optionally, the first density threshold is 0.5.

[0033] Optionally, the first information is further used to indicate that the same port of the third CSI-RS resource corresponds to different RBs in two adjacent CSI-RS measurements.

[0034] Furthermore, on the third CSI-RS resource, the RB corresponding to port p in the kth CSI-RS measurement satisfies the following relationship: P(k,p)=(P(0,p)+k)mod N. Where p represents the port index, k is the kth measurement, and P(0,p) represents the port index. 口 p is the starting frequency domain index in the initial CSI-RS measurement, P(k,p) is the frequency domain index of port p in the k-th CSI-RS measurement, N represents a parameter determined according to the frequency domain density of the third CSI-RS resource, and k is a positive integer greater than or equal to 1.

[0035] Furthermore, the first information is also used to indicate that RBs corresponding to two adjacent CSI-RS measurements on the same port of the third CSI-RS resource are not continuous.

[0036] Furthermore, the first information is further used to indicate the number of RBs spaced between RBs occupied by the same port of the third CSI-RS resource in two adjacent CSI-RS measurements.

[0037] In a possible design scheme, the first information includes one or more of the following items for each CSI-RS resource in the CSI-RS resources occupied by the CSI-RS: the number of ports corresponding to the RB where the CSI-RS resource is located, the CDM type of the CSI-RS in the CSI-RS resource, the starting time domain position corresponding to the RB where the CSI-RS is located in each CSI-RS resource, and the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in each CSI-RS resource.

[0038] In addition, the technical effects of the channel measurement method described in the second aspect can refer to the technical effects of the channel measurement method described in the first aspect, and will not be repeated here.

[0039] In a third aspect, a communication device is provided, wherein the communication device is used to execute the channel measurement method described in any one of the implementations of the first aspect to the second aspect.

[0040] In the present application, the communication device described in the third aspect may be the terminal device described in the first aspect or the network device described in the second aspect, or a chip (system) or other parts or components that can be set in the terminal device or network device, or a device that includes the terminal device or network device.

[0041] It should be understood that the communication device described in the third aspect includes a module, unit, or means corresponding to the channel measurement method described in any one of the first aspect to the second aspect, and the module, unit, or means can be implemented by hardware, software, or hardware executing corresponding software. The hardware or software includes one or more modules or units for performing the functions involved in the above-mentioned channel measurement method.

[0042] In a fourth aspect, a communication device is provided, including: a processor, the processor being configured to execute the channel measurement method described in any possible implementation manner of the first aspect to the second aspect.

[0043] In a possible design solution, the communication device described in the fourth aspect may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in the fourth aspect to communicate with other communication devices.

[0044] In a possible design scheme, the communication device described in the fourth aspect may further include a memory. The memory may be integrated with the processor or may be separately provided. The memory may be used to store the computer program and / or data involved in the channel measurement method described in any one of the first aspect to the second aspect.

[0045] In the present application, the communication device described in the fourth aspect may be the terminal device described in the first aspect or the network device described in the second aspect, or a chip (system) or other parts or components that can be set in the terminal device or network device, or a device that includes the terminal device or network device.

[0046] In a fifth aspect, a communication device is provided, comprising: a processor, the processor being coupled to a memory, the processor being configured to execute a computer program stored in the memory, so that the communication device executes the channel measurement method described in any possible implementation manner of the first aspect to the second aspect.

[0047] In a possible design solution, the communication device described in the fifth aspect may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in the fifth aspect to communicate with other communication devices.

[0048] In the present application, the communication device described in the fifth aspect may be the terminal device described in the first aspect or the network device described in the second aspect, or a chip (system) or other parts or components that can be set in the terminal device or network device, or a device that includes the terminal device or network device.

[0049] In a sixth aspect, a communication device is provided, comprising: a processor and a memory; the memory is used to store a computer program, and when the processor executes the computer program, the communication device executes the channel measurement method described in any one of the implementation methods of the first aspect to the second aspect.

[0050] In a possible design solution, the communication device described in the sixth aspect may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in the sixth aspect to communicate with other communication devices.

[0051] In the present application, the communication device described in the sixth aspect may be the terminal device described in the first aspect or the network device described in the second aspect, or a chip (system) or other parts or components that can be set in the terminal device or network device, or a device that includes the terminal device or network device.

[0052] In a seventh aspect, a communication device is provided, comprising: a processor; the processor is used to couple with a memory, and after reading a computer program in the memory, execute the channel measurement method as described in any one of the implementation methods of the first aspect to the second aspect according to the computer program.

[0053] In a possible design solution, the communication device described in the seventh aspect may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in the seventh aspect to communicate with other communication devices.

[0054] In the present application, the communication device described in the seventh aspect may be the terminal device described in the first aspect or the network device described in the second aspect, or a chip (system) or other parts or components that can be set in the terminal device or network device, or a device that includes the terminal device or network device.

[0055] In an eighth aspect, a processor is provided, wherein the processor is used to execute the channel measurement method described in any possible implementation manner of the first aspect to the second aspect.

[0056] In a ninth aspect, a communication system is provided, wherein the communication system includes one or more terminal devices and one or more network devices.

[0057] In a tenth aspect, a computer-readable storage medium is provided, comprising: a computer program or instructions; when the computer program or instructions are executed on a computer, the computer executes the channel measurement method described in any possible implementation of the first aspect to the second aspect.

[0058] In an eleventh aspect, a computer program product is provided, comprising a computer program or instructions, which, when executed on a computer, enables the computer to execute the channel measurement method described in any possible implementation of the first aspect to the second aspect.

[0059] In addition, the technical effects of the communication device described in the third to eleventh aspects above can refer to the technical effects of the channel measurement method described in the first to second aspects above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 A schematic diagram of a channel measurement process provided in an embodiment of the present application;

[0061] Figure 2 A schematic diagram of time-frequency resources occupied by a CSI-RS corresponding to one port provided in an embodiment of the present application;

[0062] Figure 3 A schematic diagram of the time-frequency resources and CDM groups occupied by CSI-RS corresponding to two ports provided in an embodiment of the present application;

[0063] Figure 4 A schematic diagram of the time-frequency resources and CDM groups occupied by CSI-RS corresponding to 4 ports provided in an embodiment of the present application;

[0064] Figure 5 A schematic diagram of the time-frequency resources and CDM groups occupied by CSI-RS corresponding to 8 ports provided in an embodiment of the present application;

[0065] Figure 6 A schematic diagram of the time-frequency resources and CDM groups occupied by CSI-RS corresponding to 12 ports provided in an embodiment of the present application;

[0066] Figure 7 A schematic diagram of the time-frequency resources and CDM groups occupied by CSI-RS corresponding to 16 ports provided in an embodiment of the present application;

[0067] Figure 8 A schematic diagram of the time-frequency resources and CDM groups occupied by CSI-RS corresponding to 24 ports provided in an embodiment of the present application;

[0068] Fig. 9 A schematic diagram of the time-frequency resources and CDM groups occupied by CSI-RS corresponding to 32 ports provided in an embodiment of the present application;

[0069] Fig.10 A schematic diagram of RBs occupied by CSI-RS under different frequency domain densities provided in an embodiment of the present application;

[0070] Fig.11 A schematic diagram of the architecture of a communication system provided in an embodiment of the present application;

[0071] Fig.12 A schematic diagram of a flow chart of a channel measurement method provided in an embodiment of the present application;

[0072] Fig.13 A schematic diagram of the correspondence between RB-level OCC, ports and resources provided in an embodiment of the present application;

[0073] Fig.14 A schematic diagram of a flow chart of another channel measurement method provided in an embodiment of the present application;

[0074] Fig.15 A schematic diagram of time-frequency resources and CDM groups occupied by CSI-RS corresponding to 48 ports provided in an embodiment of the present application;

[0075] Fig.16 A schematic diagram of the time-frequency resources and CDM groups occupied by CSI-RS corresponding to 64 ports provided in an embodiment of the present application;

[0076] Fig.17 A schematic diagram of a flow chart of another channel measurement method provided in an embodiment of the present application;

[0077] Fig.18Another schematic diagram of time-frequency resources and CDM groups occupied by CSI-RS corresponding to 48 ports provided in an embodiment of the present application;

[0078] Fig.19 A schematic diagram of a flow chart of another channel measurement method provided in an embodiment of the present application;

[0079] Fig. 20 Another schematic diagram of time-frequency resources and CDM groups occupied by CSI-RS corresponding to 48 ports provided in an embodiment of the present application;

[0080] Fig.21 A schematic diagram of a port occupying RB provided in an embodiment of the present application;

[0081] Fig. 22 A schematic diagram of another port occupying RB provided in an embodiment of the present application;

[0082] Fig.23 A schematic diagram of the relationship between ports and RB and OCC in the RB-level OCC and comb-division combination solution provided in an embodiment of the present application;

[0083] Fig.24 A schematic diagram of the relationship between ports and resources in the solution combining combing and newly added CSI-RS resources provided in an embodiment of the present application;

[0084] Fig.25 A schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0085] Fig.26 A schematic diagram of the structure of another communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0086] To facilitate understanding of the embodiments of the present application, the technical terms and technologies involved in the embodiments of the present application are first introduced below.

[0087] Time domain unit: A time domain unit may include at least one time domain symbol, such as an orthogonal frequency division multiplexing (OFDM) symbol. The time length of a time domain symbol is different under different sub-carrier spacings (SCS). The larger the sub-carrier spacing, the smaller the time length of the time domain symbol; the smaller the sub-carrier spacing, the larger the time length of the time domain symbol. For ease of understanding, in the following embodiments, an example is given in which a time domain unit includes a time domain symbol. It is understandable that the time domain unit can also be divided according to other possible time granularities, which will not be repeated here. In addition, in an embodiment of the present application, a time domain unit h refers to a time domain unit indexed as h in a resource block (RB). Wherein h is a positive integer.

[0088] Frequency domain unit, a frequency domain unit may include at least one sub-carrier. It is understandable that the frequency domain unit may also be divided according to other possible frequency domain granularities, which will not be described here. The frequency domain unit g refers to the frequency domain unit indexed as g in an RB. Wherein g is a positive integer.

[0089] See also Figure 1 , Figure 1 A flow chart of a channel measurement method provided in an embodiment of the present application is as follows: Figure 1 As shown, the channel measurement method includes the following steps S101 to S106:

[0090] S101, a network device sends channel measurement configuration information to a terminal device.

[0091] The channel measurement configuration information is used to indicate configuration parameters for performing channel measurement, such as parameters for configuring time domain resources and frequency domain resources, etc. For example, the channel measurement configuration information may indicate resources for carrying a channel state information reference signal (CSI-RS), namely, CSI-RS resources.

[0092] The channel measurement configuration information may indicate the CSI-RS resources through the following multiple items: the number of CSI-RS ports in the CSI-RS resources, the frequency domain density of the CSI-RS resources, the code division multiplexing (CDM) type of the CSI-RS in the CSI-RS resources, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resources, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resources.

[0093] The frequency domain density of the CSI-RS resource can be the ratio between the number of resource elements (REs) occupied by the CSI-RS resource in the RB set occupied by the CSI-RS resource, the number of ports corresponding to the CSI-RS and the CSI-RS in the RB set, and the number of RBs in the RB set.

[0094] The frequency domain density of CSI-RS resources may satisfy the relationship shown in the following formula (1).

[0095] ρ=r1 / p1 / r2; (1)

[0096] Among them, ρ represents the frequency domain density of CSI-RS resources, r1 represents the number of REs occupied by CSI-RS in the RB set, p1 represents the number of ports corresponding to the REs occupied by CSI-RS in the RB set, and r2 represents the number of RBs in the RB set.

[0097] For example, the number of RBs in an RB set occupied by CSI-RS resources is 2, the number of REs occupied by CSI-RS in the RB set is 48, and the number of ports corresponding to CSI-RS in the RB set is 24, then the frequency domain density of the CSI-RS resource is 1. The number of RBs in an RB set occupied by CSI-RS resources is 2, the number of REs occupied by CSI-RS in the RB set is 24, and the number of ports corresponding to CSI-RS in the RB set is 24, then the frequency domain density of the CSI-RS resource is 0.5.

[0098] Optionally, the CSI-RS resource may be a non-zero power channel state information reference signal (NZP CSI-RS) resource, which is only used as an example here. In actual implementation, it may also be other possible resources, which will not be described in detail here.

[0099] S102, the terminal device determines the CSI-RS resources occupied by the CSI-RS according to the channel measurement configuration information.

[0100] In an embodiment of the present application, at least one first combination can be preconfigured in a terminal device. Each first combination includes: the number of CSI-RS ports in a CSI-RS resource, the frequency domain density of a CSI-RS resource, the CDM type of a CSI-RS in a CSI-RS resource, and the time-frequency position corresponding to the RB where the CSI-RS is located in the CSI-RS resource. The time-frequency position corresponding to the RB where the CSI-RS is located in the CSI-RS resource includes the time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource and the frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource. The time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource includes the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource includes the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource. Among them, the time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource may include time domain positions in two time domain position sets, and the time domain positions in each time domain position set are continuous. The starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource refers to the starting time domain position of each set in the two time domain position sets, and these two starting time domain positions may also be referred to as the first starting time domain position and the second starting time domain position. In the case where the time unit includes 1 time domain symbol, the first starting time domain position may also be referred to as the first starting time domain symbol, and the second starting time domain position may also be referred to as the second starting time domain symbol.

[0101] Optionally, the first combination may also include one or more of the following: an index of at least one CDM group corresponding to the CSI-RS resource, an index of a frequency domain unit of RE occupied by CSI-RS in the CSI-RS resource in a CDM group, an index of a time domain unit of RE occupied by CSI-RS resource in a CDM group, or a row index.

[0102] It can be understood that the index of the CDM group can also be called the identifier of the CDM group or other possible names, the index of the frequency domain unit can also be called the identifier of the frequency domain unit or other possible names, the index of the time domain unit can also be called the identifier of the time domain unit or other possible names, and the row index can also be called the row identifier or other possible names, which will not be repeated here.

[0103] For examples of the first combination, please refer to the relevant introduction in Table 1 below, which will not be repeated here.

[0104] The terminal device can determine the CSI-RS resource based on the channel measurement configuration information and the first combination. The specific implementation can refer to the relevant introduction of Tables 1 to 13 below, which will not be repeated here.

[0105] S103: The network device determines the CSI-RS resources occupied by the CSI-RS.

[0106] At least one first combination can be preconfigured in the network device. The network device can first determine the number of ports of CSI-RS in the CSI-RS resource, the frequency domain density of the CSI-RS resource, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and then determine the CSI-RS resource according to the number of ports of CSI-RS in the CSI-RS resource, the frequency domain density of the CSI-RS resource, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the first combination.

[0107] For the specific implementation principle of S103, please refer to the relevant introduction of S102, which will not be repeated here.

[0108] S104, the network device sends a CSI-RS to the terminal device on the CSI-RS resource. Correspondingly, the terminal device receives the CSI-RS from the network device on the CSI-RS resource.

[0109] In a communication system, such as a new radio (NR) system, a network device sends a CSI-RS on a CSI-RS resource for a terminal device to detect a downlink channel, and the terminal device receives a CSI-RS on a pre-configured CSI-RS resource for channel estimation. In addition, the terminal device may also receive an interference measurement signal on a pre-configured interference measurement resource for interference measurement. The terminal device calculates the final (channel state information, CSI) reporting amount based on the measurement results on the CSI-RS resource and the interference measurement resource. Among them, the process including the following steps may be referred to as a CSI calculation process: the terminal device measures the CSI-RS on the CSI-RS resource, measures the interference measurement signal on the interference measurement resource, and obtains the CSI reporting amount. Among them, the CSI reporting amount may include one or more of the following: channel rank indicator (RI), channel quality indicator (CQI) (determined jointly according to the measurement result of the CSI-RS and the interference measurement result), and precoding matrix indicator (PMI). RI is used to determine the number of data streams transmitted from the network device to the terminal device; CQI is used to determine the modulation order and channel coding rate of the data transmitted from the network device to the terminal device; PMI is used to determine the precoding of the data transmitted from the network device to the terminal device.

[0110] S105, the terminal device reports CSI to the network device according to the measurement result of CSI-RS.

[0111] It can be understood that CSI includes CSI reporting amount, and therefore, CSI includes information in the CSI reporting amount.

[0112] also, Figure 1 The provided method may further include S106.

[0113] S106, the network device sends data according to the CSI reported by the terminal device.

[0114] Understandable, Figure 1 In the provided method, the execution order of S101, S102 and S103 is not limited. For example, S103 can be executed before S101, or S102 can be executed after S103, which will not be described in detail here.

[0115] The implementation principle of the first combination can be referred to as shown in Table 1. After receiving the channel measurement configuration information from the network device, the terminal device can determine the time-frequency position occupied by the CSI-RS resource from the first combination, that is, determine the CSI-RS resource, or perform time-frequency resource mapping, according to the number of CSI-RS ports in the CSI-RS resource, the frequency domain density of the CSI-RS resource, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource. It should be understood that the number of CSI-RS ports in a CSI-RS resource is the number of ports corresponding to the RB occupied by the CSI-RS; the CDM type of the CSI-RS in the CSI-RS resource is the CDM type corresponding to each RB occupied by the CSI-RS resource; the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource is the starting frequency domain position of the CDM in each RB occupied by the CSI-RS resource; the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource is the starting time domain position of the CSI-RS resource in each RB occupied. The starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource can be the frequency domain unit at the start of the CDM group, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource can be the time domain unit corresponding to the RB where the CSI-RS is located in the CSI-RS resource. CSI-RS resources may include time domain resources and frequency domain resources, wherein the time domain resources may be in time domain units, and the frequency domain resources may be in frequency domain units. In the following embodiments, time domain resources are illustrated in time domain units and frequency domain resources are illustrated in frequency domain units, which will not be repeated later.

[0116] Table 1

[0117]

[0118]

[0119] In the above Table 1, X represents the number of CSI-RS ports in the CSI-RS resource, ρ represents the frequency domain density of the CSI-RS resource, Indicates the starting time-frequency resource position of a CDM group in an RB. Indicates the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, such as the starting frequency domain unit, Indicates the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, such as the starting time domain unit. j represents the CDM group index, k′ represents the index of the frequency domain unit of the RE occupied by the CSI-RS in the CSI-RS resource in a CDM group, and l′ represents the index of the time domain unit of the RE occupied by the CSI-RS resource in a CDM group. k0, k1, k2, k3, k4, k5 are all indexes of the frequency domain unit. l0, l1 are all indexes of the time domain unit. k0, k1, k2, k3, k4, l0, l1 are all constants.

[0120] It is understandable that in the embodiment of the present application, the frequency domain unit can be represented by the index of the frequency domain unit, that is, the frequency domain index. The time domain unit can be represented by the index of the time domain unit, that is, the time domain index. The frequency domain index can also be other information that can be used to identify the frequency domain unit, and the time domain index can also be other information that can be used to identify the time domain unit, which is not limited in the embodiment of the present application.

[0121] In addition, in the above Table 1, the row index is only used for example. In actual implementation, the row indexes between different rows can be exchanged, or the starting value of the row index can be 2 or other index values, which will not be repeated here.

[0122] It can be understood that the index of the port of the CSI-RS in the CSI-RS resource can be determined according to the following formulas (2) to (4).

[0123] p=3000+s+jL; (2)

[0124] j=0,1,……,N / L-1; (3)

[0125] s=0,1,……,L-1; (4)

[0126] Wherein, p represents the index of the CSI-RS port in the CSI-RS resource, j represents the index of the CDM group, s represents the index of the orthogonal cover code (OCC) sequence in a CDM group, and N represents the total number of CSI-RS ports in the CSI-RS resource. L represents the size of a CDM group, that is, the number of CDM groups corresponding to the CSI-RS ports in the CSI-RS resource.

[0127] In the following embodiments, the ports of CSI-RS in the CSI-RS resources are referred to as port abbreviations, which will not be described in detail later.

[0128] In the CDM type of CSI-RS in the CSI-RS resource, noCDM means that there is no port multiplexing, and there is only one port on one RE. Among them, the index of the port in a CDM group, the frequency domain orthogonal OCC sequence w f(0) and the time domain orthogonal OCC sequence w t The corresponding relationship between (0) is shown in Table 2 below.

[0129] Table 2

[0130] Index of the port in a CDM group <![CDATA[w f (0)]]> <![CDATA[w t (0)]]> 0 1 1

[0131] In the CDM type of CSI-RS in the CSI-RS resource, fd-CDM2 indicates that two ports are multiplexed on two REs. In fd-CDM2, the port orthogonality is achieved through a frequency domain orthogonal OCC with a length of 2. In this case, one CDM can be used to distinguish two ports. Among them, the index of the port in a CDM group, the frequency domain orthogonal OCC sequence [w f (0),w f (1)] and the time-domain orthogonal OCC sequence w t The corresponding relationship between (0) is shown in Table 3 below.

[0132] Table 3

[0133] Index of the port in a CDM group <![CDATA[[w f (0),in f (1)]]]> <![CDATA[w t (0)]]> 0 [+1,+1] 1 1 [+1,-1] 1

[0134] In the CDM type of CSI-RS in the CSI-RS resource, cdm4-FD2-TD2 indicates that 4 ports are multiplexed on 4 REs corresponding to 2 frequency domain units and 2 time domain units. cdm4-FD2-TD2 realizes port orthogonality through frequency domain orthogonal OCC of length 2 and time domain orthogonal OCC of length 2. In this case, one CDM can be used to distinguish 4 ports. Among them, the index of the port in a CDM group, the frequency domain orthogonal OCC sequence [w f (0),w f (1)] and the time-domain orthogonal OCC sequence [w t (0),w t (1)] are shown in Table 4 below.

[0135] Table 4

[0136] Index of the port in a CDM group <![CDATA[[w f (0),in f (1)]]]> <![CDATA[[w t (0),in t (1)]]]> 0 [+1,+1] [+1,+1] 1 [+1,-1] [+1,+1] 2 [+1,+1] [+1,-1] 3 [+1,-1] [+1,-1]

[0137] In the CDM type of CSI-RS in the CSI-RS resource, cdm8-FD2-TD4 indicates that 8 ports are multiplexed on 8 REs corresponding to 2 frequency domain units and 4 time domain units. cdm8-FD2-TD4 realizes port orthogonality through frequency domain orthogonal OCC of length 2 and time domain orthogonal OCC of length 4. In this case, one CDM can be used to distinguish 8 ports. Among them, the index of the port in a CDM group, the sequence corresponding to the frequency domain [w f (0),w f (1)] and the corresponding sequence in the time domain [wt (0),w t (1),w t (2),w t (3)] ​​are shown in Table 5 below.

[0138] Table 5

[0139] Index of the port in a CDM group <![CDATA[[w f (0),in f (1)]]]> <![CDATA[[w t (0),in t (1),in t (2),in t (3)]]]> 0 [+1,+1] [+1,+1,+1,+1] 1 [+1,-1] [+1,+1,+1,+1] 2 [+1,+1] [+1,-1,+1,-1] 3 [+1,-1] [+1,-1,+1,-1] 4 [+1,+1] [+1,+1,-1,-1] 5 [+1,-1] [+1,+1,-1,-1] 6 [+1,+1] [+1,-1,-1,+1] 7 [+1,-1] [+1,-1,-1,+1]

[0140] For ease of understanding, the following example combines the number of CSI-RS ports in the CSI-RS resource and the channel measurement configuration information to illustrate how the terminal device determines the time-frequency resources of the CSI-RS resource, that is, performs resource mapping. In the following examples, it is assumed that k0=0, k1=2, k2=4, k3=6, k4=8, k5=10, l0=5, l1=9 in Table 1. It can be understood that k0, k1, k2, k3, k4, k5, l0, l1 in Table 1 can also be other values, which are only used as examples here and will not be repeated.

[0141] (1) The number of CSI-RS ports in the CSI-RS resource is 1. Assume that the CDM group corresponding to the RB occupied by the CSI-RS in the CSI-RS resource includes CDM group 0, and the X, ρ, CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the CSI-RS resource is located, and the starting time domain position of the CDM group indicated by the channel measurement configuration information are as shown in case 1-1 or case 1-2 in Table 6 below:

[0142] Table 6

[0143]

[0144] In situation 1-1, the terminal device determines that situation 1-1 corresponds to the first row of Table 1 based on X, ρ, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource in situation 1-1, and determines that the REs occupied by the CSI-RS resource on one RB include the REs occupied by CDM group 0, that is, the REs corresponding to time domain unit 5, frequency domain unit 0, frequency domain unit 4, and frequency domain unit 8, based on the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource in situation 1-1, the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the first row of Table 1. At this time, the correspondence between the REs occupied by the CSI-RS resource and CDM group 0 is as follows: Figure 2 As shown in (a) in .

[0145] In scenario 1-2, the terminal device determines that scenario 1-2 corresponds to the second row of Table 1 based on X, ρ, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource in scenario 1-2, and determines that the REs occupied by the CSI-RS resource on one RB include the REs occupied by CDM group 0, that is, the REs corresponding to time domain unit 0 and frequency domain unit 5, based on the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource in scenario 1-2, the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the second row of Table 1. At this time, the correspondence between the time-frequency resources occupied by the CSI-RS resource in scenario 1-2 and CDM group 0 is as follows: Figure 2 As shown in (b) in .

[0146] It can be understood that in the embodiment of the present application, CDM group u represents a CDM group with index u, which will not be described in detail later.

[0147] (2) The number of CSI-RS ports in the CSI-RS resource is 2.

[0148] Assuming that the CDM group corresponding to the RB occupied by the CSI-RS in the CSI-RS resource includes CDM group 0, X, p, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource indicated by the channel measurement configuration information are shown in Table 7 below:

[0149] Table 7

[0150]

[0151] The terminal device determines that Table 7 corresponds to the third row of Table 1 according to X, ρ, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource in Table 7, and determines that the REs occupied by the CSI-RS resource on one RB include the REs occupied by CDM group 0, that is, the REs corresponding to time domain unit 5, frequency domain unit 0, and frequency domain unit 1, according to the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource in Table 7, the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the third row of Table 1. At this time, the correspondence between the REs occupied by the CSI-RS resource and CDM group 0 is as follows: Figure 3shown.

[0152] (3) The number of CSI-RS ports in the CSI-RS resource is 4.

[0153] Assume that X, ρ, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource indicated by the channel measurement configuration information are as shown in Case 3-1 or Case 3-2 in Table 8 below:

[0154] Table 8

[0155]

[0156] In case 3-1, the CDM groups corresponding to the RB occupied by the CSI-RS in the CSI-RS resource include CDM group 0 and CDM group 1. The terminal device determines that case 3-1 corresponds to the 4th row of Table 1 according to X, ρ, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource in case 3-1, and determines that the REs occupied by the CSI-RS resource on one RB include the REs occupied by CDM group 0 and the REs occupied by CDM group 1 according to the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource in case 3-1, the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the 4th row of Table 1. At this time, the REs occupied by CDM group 0 include the REs corresponding to frequency domain unit 0, frequency domain unit 1, and time domain unit 5. REs occupied by CDM group 1 include REs corresponding to frequency domain unit 2, frequency domain unit 3, and time domain unit 5. For the correspondence between the time-frequency resources occupied by CSI-RS resources and CDM groups in scenario 3-1, refer to Figure 4 As shown in (a) in .

[0157] In scenario 3-2, the CDM groups corresponding to the RB occupied by the CSI-RS in the CSI-RS resource include CDM group 0 and CDM group 1. The terminal device determines that scenario 3-2 corresponds to the fifth row of Table 1 based on X, ρ, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource in scenario 3-2, and determines that the REs occupied by the CSI-RS resource on one RB include the REs occupied by CDM group 0 and the REs occupied by CDM group 1 based on the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource in scenario 3-2, the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the fifth row of Table 1. At this time, the REs occupied by CDM group 0 include the REs corresponding to frequency domain unit 0, frequency domain unit 1, and time domain unit 5. The REs occupied by CDM group 1 include REs corresponding to frequency domain unit 0, frequency domain unit 1, and time domain unit 6. REs corresponding to time domain unit 5, time domain unit 6, and frequency domain unit 0 to frequency domain unit 1. At this time, the correspondence between the time-frequency resources occupied by the CSI-RS resources and the CDM groups in scenario 3-2 can be referred to as follows Figure 4 As shown in (b) in .

[0158] (4) The number of CSI-RS ports in the CSI-RS resource is 8.

[0159] Assume that X, ρ, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource indicated by the channel measurement configuration information are shown in any row of Case 4-1 to Case 4-3 in Table 9 below:

[0160] Table 9

[0161]

[0162] In case 4-1, the CDM groups corresponding to the RBs occupied by the CSI-RS in the CSI-RS resource include CDM groups 0 to CDM groups 3. The terminal device determines that case 4-1 corresponds to the sixth row of Table 1 according to X, ρ, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource in case 4-1, and determines that the REs occupied by the CSI-RS resource on one RB include the REs occupied by each CDM in CDM groups 0 to CDM groups 3 according to the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource in case 4-1, the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the sixth row of Table 1. At this time, the REs occupied by CDM group 0 include the REs corresponding to frequency domain unit 0, frequency domain unit 1, and time domain unit 5. The REs occupied by CDM group 1 include REs corresponding to frequency domain unit 2, frequency domain unit 3, and time domain unit 5. The REs occupied by CDM group 2 include REs corresponding to frequency domain unit 4, frequency domain unit 5, and time domain unit 5. The REs occupied by CDM group 3 include REs corresponding to frequency domain unit 6, frequency domain unit 7, and time domain unit 5. The correspondence between the time-frequency resources occupied by the CSI-RS resources and the CDM groups in scenario 4-1 can be referred to as follows: Figure 5 As shown in (a) in .

[0163] In case 4-2, the CDM groups corresponding to the RBs occupied by the CSI-RS in the CSI-RS resource include CDM groups 0 to CDM groups 3. The terminal device determines that case 4-2 corresponds to the 7th row of Table 1 according to X, ρ, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource in case 4-2, and determines that the REs occupied by the CSI-RS resource on one RB include the REs occupied by each CDM in CDM groups 0 to CDM groups 3 according to the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource in case 4-2, the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the 7th row of Table 1. At this time, the REs occupied by CDM group 0 include the REs corresponding to frequency domain unit 0, frequency domain unit 1, and time domain unit 5. The REs occupied by CDM group 1 include REs corresponding to frequency domain unit 2, frequency domain unit 3, and time domain unit 5. The REs occupied by CDM group 2 include REs corresponding to frequency domain unit 0, frequency domain unit 1, and time domain unit 6. The REs occupied by CDM group 3 include REs corresponding to frequency domain unit 2, frequency domain unit 3, and time domain unit 6. The correspondence between the time-frequency resources occupied by the CSI-RS resources and the CDM groups in scenario 4-2 can be referred to as follows: Figure 5 As shown in (b) in .

[0164] In case 4-3, the CDM groups corresponding to the RB occupied by the CSI-RS in the CSI-RS resource include CDM group 0 and CDM group 1. The terminal device determines that case 4-3 corresponds to the 8th row of Table 1 according to X, ρ, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource in case 4-3, and determines that the REs occupied by the CSI-RS resource on one RB include the REs occupied by CDM group 0 and the REs occupied by CDM group 1 according to the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource in case 4-3, the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the 8th row of Table 1. At this time, the REs occupied by CDM group 0 include the REs corresponding to frequency domain unit 0, frequency domain unit 1, time domain unit 5, and time domain unit 6. The REs occupied by CDM group 1 include REs corresponding to frequency domain unit 2, frequency domain unit 3, time domain unit 5, and time domain unit 6. The corresponding relationship between the time-frequency resources occupied by the CSI-RS resources and the CDM groups in scenario 4-3 can be referred to as follows: Figure 5 As shown in (c) in .

[0165] (5) The number of CSI-RS ports in the CSI-RS resource is 12.

[0166] Assume that X, ρ, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource indicated by the channel measurement configuration information are as shown in Case 5-1 or Case 5-2 in Table 10 below:

[0167] Table 10

[0168]

[0169] In case 5-1, the CDM group corresponding to the RB occupied by the CSI-RS in the CSI-RS resource includes CDM group 0 to CDM group 5. The terminal device determines that case 5-1 corresponds to the 9th row of Table 1 according to X, ρ, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource in case 5-1, and determines that the REs occupied by the CSI-RS resource on one RB include the REs occupied by each CDM in CDM group 0 to CDM group 5 according to the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource in case 5-1, the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the 9th row of Table 1. At this time, the REs occupied by CDM group 0 include the REs corresponding to frequency domain unit 0, frequency domain unit 1, and time domain unit 5. The REs occupied by CDM group 1 include REs corresponding to frequency domain unit 2, frequency domain unit 3, and time domain unit 5. The REs occupied by CDM group 2 include REs corresponding to frequency domain unit 4, frequency domain unit 5, and time domain unit 5. The REs occupied by CDM group 3 include REs corresponding to frequency domain unit 6, frequency domain unit 7, and time domain unit 5. The REs occupied by CDM group 4 include REs corresponding to frequency domain unit 8, frequency domain unit 9, and time domain unit 5. The REs occupied by CDM group 5 include REs corresponding to frequency domain unit 10, frequency domain unit 11, and time domain unit 5. The correspondence between the time-frequency resources occupied by the CSI-RS resources and the CDM groups in scenario 5-1 can be referred to as follows: Figure 6 As shown in (a) in .

[0170] In case 5-2, the CDM groups corresponding to the RBs occupied by the CSI-RS in the CSI-RS resource include CDM groups 0 to CDM groups 2. The terminal device determines that case 5-2 corresponds to the 10th row of Table 1 according to X, ρ, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource in case 5-2, and determines that the REs occupied by the CSI-RS resource on one RB include the REs occupied by each CDM in CDM groups 0 to CDM groups 3 according to the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource in case 5-2, the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the 10th row of Table 1. At this time, the REs occupied by CDM group 0 include the REs corresponding to frequency domain unit 0, frequency domain unit 1, time domain unit 5, and time domain unit 6. The REs occupied by CDM group 1 include REs corresponding to frequency domain unit 2, frequency domain unit 3, time domain unit 5, and time domain unit 6. The REs occupied by CDM group 2 include REs corresponding to frequency domain unit 4, frequency domain unit 5, time domain unit 5, and time domain unit 6. The correspondence between the time-frequency resources occupied by the CSI-RS resources and the CDM groups in scenario 5-2 can be referred to as follows: Figure 6 As shown in (b) in .

[0171] (6) The number of CSI-RS ports in the CSI-RS resource is 16.

[0172] Assume that X, ρ, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource indicated by the channel measurement configuration information are as shown in Case 6-1 or Case 6-2 in Table 11 below:

[0173] Table 11

[0174]

[0175] In case 6-1, the CDM group corresponding to the RB occupied by the CSI-RS in the CSI-RS resource includes CDM group 0 to CDM group 7. The terminal device determines that case 6-1 corresponds to the 11th row of Table 1 according to X, ρ, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource in case 6-1, and determines that the REs occupied by the CSI-RS resource on one RB include the REs occupied by each CDM in CDM group 0 to CDM group 7 according to the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource in case 6-1, the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the 11th row of Table 1. At this time, the REs occupied by CDM group 0 include the REs corresponding to frequency domain unit 0, frequency domain unit 1, and time domain unit 5. The REs occupied by CDM group 1 include REs corresponding to frequency domain unit 2, frequency domain unit 3, and time domain unit 5. The REs occupied by CDM group 2 include REs corresponding to frequency domain unit 4, frequency domain unit 5, and time domain unit 5. The REs occupied by CDM group 3 include REs corresponding to frequency domain unit 6, frequency domain unit 7, and time domain unit 5. The REs occupied by CDM group 4 include REs corresponding to frequency domain unit 0, frequency domain unit 1, and time domain unit 6. The REs occupied by CDM group 5 include REs corresponding to frequency domain unit 2, frequency domain unit 3, and time domain unit 6. The REs occupied by CDM group 6 include REs corresponding to frequency domain unit 4, frequency domain unit 5, and time domain unit 6. The REs occupied by CDM group 7 include REs corresponding to frequency domain unit 6, frequency domain unit 7, and time domain unit 6. The correspondence between the time-frequency resources occupied by the CSI-RS resources and the CDM groups in scenario 6-1 is as follows: Figure 7 As shown in (a) in .

[0176] In case 6-2, the CDM group corresponding to the RB occupied by the CSI-RS in the CSI-RS resource includes CDM group 0 to CDM group 3. The terminal device determines that case 6-2 corresponds to the 12th row of Table 1 according to X, ρ, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource in case 6-2, and determines that the REs occupied by the CSI-RS resource on one RB include the REs occupied by each CDM in CDM group 0 to CDM group 3 according to the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource in case 6-2, the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the 12th row of Table 1. At this time, the REs occupied by CDM group 0 include the REs corresponding to frequency domain unit 0, frequency domain unit 1, time domain unit 5, and time domain unit 6. The REs occupied by CDM group 1 include REs corresponding to frequency domain unit 2, frequency domain unit 3, time domain unit 5, and time domain unit 6. The REs occupied by CDM group 2 include REs corresponding to frequency domain unit 4, frequency domain unit 5, time domain unit 5, and time domain unit 6. The REs occupied by CDM group 3 include REs corresponding to frequency domain unit 6, frequency domain unit 7, time domain unit 5, and time domain unit 6. The correspondence between the time-frequency resources occupied by the CSI-RS resources and the CDM groups in scenario 6-2 is as follows: Figure 7 As shown in (b) in .

[0177] (7) The number of CSI-RS ports in the CSI-RS resource is 24.

[0178] Assume that X, ρ, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource indicated by the channel measurement configuration information are as shown in any row of Case 7-1 to Case 7-3 in Table 12 below:

[0179] Table 12

[0180]

[0181] In scenario 7-1, the CDM group corresponding to the RB occupied by the CSI-RS in the CSI-RS resource includes CDM group 0 to CDM group 11. The terminal device determines that scenario 7-1 corresponds to the 13th row of Table 1 according to X, ρ, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource in scenario 7-1, and determines that the REs occupied by the CSI-RS resource on one RB include the REs occupied by each CDM in CDM group 0 to CDM group 11 according to the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource in scenario 7-1, the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the 13th row of Table 1. At this time, the REs occupied by CDM group 0 include the REs corresponding to frequency domain unit 0, frequency domain unit 1, and time domain unit 5. The REs occupied by CDM group 1 include REs corresponding to frequency domain unit 2, frequency domain unit 3, and time domain unit 5. The REs occupied by CDM group 2 include REs corresponding to frequency domain unit 4, frequency domain unit 5, and time domain unit 5. The REs occupied by CDM group 3 include REs corresponding to frequency domain unit 0, frequency domain unit 1, and time domain unit 6. The REs occupied by CDM group 4 include REs corresponding to frequency domain unit 2, frequency domain unit 3, and time domain unit 6. The REs occupied by CDM group 5 include REs corresponding to frequency domain unit 4, frequency domain unit 5, and time domain unit 6. The REs occupied by CDM group 6 include REs corresponding to frequency domain unit 0, frequency domain unit 1, and time domain unit 9. The REs occupied by CDM group 7 include REs corresponding to frequency domain unit 2, frequency domain unit 3, and time domain unit 9. The REs occupied by CDM group 8 include REs corresponding to frequency domain unit 4, frequency domain unit 5, and time domain unit 9. The REs occupied by CDM group 9 include REs corresponding to frequency domain unit 0, frequency domain unit 1, and time domain unit 10. The REs occupied by CDM group 10 include REs corresponding to frequency domain unit 2, frequency domain unit 3, and time domain unit 10. The REs occupied by CDM group 11 include REs corresponding to frequency domain unit 4, frequency domain unit 5, and time domain unit 10. The correspondence between the time-frequency resources occupied by the CSI-RS resources and the CDM groups in scenario 7-1 can be referred to as follows: Figure 8 As shown in (a) in .

[0182] In case 7-2, the CDM groups corresponding to the RBs occupied by the CSI-RS in the CSI-RS resource include CDM groups 0 to CDM groups 5. The terminal device determines that case 7-2 corresponds to the 14th row of Table 1 according to X, ρ, CDM type, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource in case 7-2, and determines that the REs occupied by the CSI-RS resource on one RB include the REs occupied by each CDM in CDM groups 0 to CDM groups 5 according to the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource in case 7-2, the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the 14th row of Table 1. At this time, the REs occupied by CDM group 0 include the REs corresponding to frequency domain unit 0, frequency domain unit 1, time domain unit 5, and time domain unit 6. The REs occupied by CDM group 1 include REs corresponding to frequency domain unit 2, frequency domain unit 3, time domain unit 5, and time domain unit 6. The REs occupied by CDM group 2 include REs corresponding to frequency domain unit 4, frequency domain unit 5, time domain unit 5, and time domain unit 6. The REs occupied by CDM group 3 include REs corresponding to frequency domain unit 0, frequency domain unit 1, time domain unit 9, and time domain unit 10. The REs occupied by CDM group 4 include REs corresponding to frequency domain unit 2, frequency domain unit 3, time domain unit 9, and time domain unit 10. The REs occupied by CDM group 5 include REs corresponding to frequency domain unit 4, frequency domain unit 5, time domain unit 9, and time domain unit 10. The correspondence between the time-frequency resources occupied by the CSI-RS resources and the CDM groups in scenario 7-2 can be referred to as follows. Figure 8 As shown in (b) in .

[0183] In case 7-3, the CDM groups corresponding to the RBs occupied by the CSI-RS in the CSI-RS resource include CDM groups 0 to CDM groups 2. The terminal device determines that case 7-3 corresponds to the 15th row of Table 1 according to X, ρ, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource in case 7-3, and determines that the REs occupied by the CSI-RS resource on one RB include the REs occupied by each CDM in CDM groups 0 to CDM groups 2 according to the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource in case 7-3, the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the 15th row of Table 1. At this time, the REs occupied by CDM group 0 include the REs corresponding to frequency domain unit 0, frequency domain unit 1, and time domain units 5 to 8. The REs occupied by CDM group 1 include REs corresponding to frequency domain unit 2, frequency domain unit 3, and time domain units 5 to 8. The REs occupied by CDM group 2 include REs corresponding to frequency domain unit 4, frequency domain unit 5, and time domain units 5 to 8. The correspondence between the time-frequency resources occupied by the CSI-RS resources and the CDM groups in scenario 7-3 can be referred to as follows: Figure 8 As shown in (c) in .

[0184] (8) The number of CSI-RS ports in the CSI-RS resource is 32.

[0185] Assume that X, ρ, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource indicated by the channel measurement configuration information are as shown in any row of Case 8-1 to Case 8-3 in Table 13 below:

[0186] Table 13

[0187]

[0188] In scenario 8-1, the CDM groups corresponding to the RBs occupied by the CSI-RS in the CSI-RS resource include CDM groups 0 to CDM groups 15. The terminal device determines that scenario 8-1 corresponds to the 16th row of Table 1 according to X, ρ, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource in scenario 8-1, and determines that the REs occupied by the CSI-RS resource on one RB include the REs occupied by each CDM in CDM groups 0 to CDM groups 15 according to the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource in scenario 8-1, the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the 16th row of Table 1. At this time, the REs occupied by CDM group 0 include the REs corresponding to frequency domain unit 0, frequency domain unit 1, and time domain unit 5. The REs occupied by CDM group 1 include REs corresponding to frequency domain unit 2, frequency domain unit 3, and time domain unit 5. The REs occupied by CDM group 2 include REs corresponding to frequency domain unit 4, frequency domain unit 5, and time domain unit 5. The REs occupied by CDM group 3 include REs corresponding to frequency domain unit 6, frequency domain unit 7, and time domain unit 5. The REs occupied by CDM group 4 include REs corresponding to frequency domain unit 0, frequency domain unit 1, and time domain unit 6. The REs occupied by CDM group 5 include REs corresponding to frequency domain unit 2, frequency domain unit 3, and time domain unit 6. The REs occupied by CDM group 6 include REs corresponding to frequency domain unit 4, frequency domain unit 5, and time domain unit 6. The REs occupied by CDM group 7 include REs corresponding to frequency domain unit 6, frequency domain unit 7, and time domain unit 5. The REs occupied by CDM group 8 include REs corresponding to frequency domain unit 0, frequency domain unit 1, and time domain unit 9. The REs occupied by CDM group 9 include REs corresponding to frequency domain unit 2, frequency domain unit 3, and time domain unit 9. The REs occupied by CDM group 10 include REs corresponding to frequency domain unit 4, frequency domain unit 5 and time domain unit 9. The REs occupied by CDM group 11 include REs corresponding to frequency domain unit 6, frequency domain unit 7 and time domain unit 9. The REs occupied by CDM group 12 include REs corresponding to frequency domain unit 0, frequency domain unit 1 and time domain unit 10. The REs occupied by CDM group 13 include REs corresponding to frequency domain unit 2, frequency domain unit 3 and time domain unit 10. The REs occupied by CDM group 14 include REs corresponding to frequency domain unit 4, frequency domain unit 5 and time domain unit 10. The REs occupied by CDM group 15 include REs corresponding to frequency domain unit 6, frequency domain unit 7 and time domain unit 9. The correspondence between the time-frequency resources occupied by the CSI-RS resources and the CDM groups in scenario 8-1 can be referred to as follows. Fig. 9 As shown in (a) in .

[0189] In case 8-2, the CDM groups corresponding to the RBs occupied by the CSI-RS in the CSI-RS resource include CDM groups 0 to CDM groups 7. The terminal device determines that case 8-2 corresponds to the 17th row of Table 1 according to X, ρ, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource in case 8-2, and determines that the REs occupied by the CSI-RS resource on one RB include the REs occupied by each CDM in CDM groups 0 to CDM groups 7 according to the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource in case 8-2, the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the 17th row of Table 1. At this time, the REs occupied by CDM group 0 include the REs corresponding to frequency domain unit 0, frequency domain unit 1, time domain unit 5, and time domain unit 6. The REs occupied by CDM group 1 include REs corresponding to frequency domain unit 2, frequency domain unit 3, time domain unit 5, and time domain unit 6. The REs occupied by CDM group 2 include REs corresponding to frequency domain unit 4, frequency domain unit 5, time domain unit 5, and time domain unit 6. The REs occupied by CDM group 3 include REs corresponding to frequency domain unit 6, frequency domain unit 7, time domain unit 5, and time domain unit 6. The REs occupied by CDM group 4 include REs corresponding to frequency domain unit 0, frequency domain unit 1, time domain unit 9, and time domain unit 10. The REs occupied by CDM group 5 include REs corresponding to frequency domain unit 2, frequency domain unit 3, time domain unit 9, and time domain unit 10. The REs occupied by CDM group 6 include REs corresponding to frequency domain unit 4, frequency domain unit 5, time domain unit 9, and time domain unit 10. The REs occupied by CDM group 7 include REs corresponding to frequency domain unit 6, frequency domain unit 7, time domain unit 9, and time domain unit 10. The correspondence between the time-frequency resources occupied by the CSI-RS resources and the CDM groups in scenario 8-2 can be referred to as follows. Fig. 9 As shown in (b) in .

[0190] In case 8-3, the CDM group corresponding to the RB occupied by the CSI-RS in the CSI-RS resource includes CDM group 0 to CDM group 3. The terminal device determines that case 8-3 corresponds to the 18th row of Table 1 according to X, ρ, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource in case 8-3, and determines that the REs occupied by the CSI-RS resource on one RB include the REs occupied by each CDM in CDM group 0 to CDM group 3 according to the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource in case 8-3, the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the 18th row of Table 1. At this time, the REs occupied by CDM group 0 include the REs corresponding to frequency domain unit 0, frequency domain unit 1, and time domain unit 5 to time domain unit 8. The REs occupied by CDM group 1 include REs corresponding to frequency domain unit 2, frequency domain unit 3, and time domain units 5 to 8. The REs occupied by CDM group 2 include REs corresponding to frequency domain unit 4, frequency domain unit 5, and time domain units 5 to 8. The REs occupied by CDM group 3 include REs corresponding to frequency domain unit 6, frequency domain unit 7, and time domain units 5 to 8. The correspondence between the time-frequency resources occupied by the CSI-RS resources and the CDM groups in scenario 8-3 can be referred to as follows: Fig. 9 As shown in (c) in .

[0191] The following further describes the RBs occupied by CSI-RS in the CSI-RS resource under the above-mentioned various port numbers. Assuming that the CSI-RS in the CSI-RS resource corresponds to 8 RBs, then in the case of ρ=1, the CSI-RS in the CSI-RS resource occupies the time-frequency resources of each RB. The RBs occupied by the CSI-RS resource are as follows: Fig.10 As shown in (a) in the figure. When ρ = 0.5, the CSI-RS in the CSI-RS resource occupies one RB of the time-frequency resource in every two RBs. The RBs occupied by the CSI-RS in the CSI-RS resource are as follows: Fig.10 As shown in (b) in .

[0192] In the above scheme, the number of ports supported by CSI-RS resources is relatively small, for example, a maximum of 32 ports are supported. Therefore, the number of configurable CSI-RS ports is limited. In a system with a larger antenna scale, the number of transmitting antennas may include 64, 128, or 256, which is greater than 32. At this time, the terminal device can obtain less channel state information in the spatial dimension, which will result in low accuracy of the obtained channel measurement results.

[0193] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0194] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as wireless fidelity (WiFi) systems, vehicle to everything (V2X) communication systems, device-to-device (D2D) communication systems, Internet of Vehicles communication systems, 4th generation (4G) mobile communication systems, such as long term evolution (LTE) systems, worldwide interoperability for microwave access (WiMAX) communication systems, fifth generation (5G) mobile communication systems, such as new radio (NR) systems, and future communication systems, such as sixth generation (6G) mobile communication systems.

[0195] The present application will present various aspects, embodiments or features around a system that may include multiple devices, components, modules, etc. It should be understood and appreciated that each system may include additional devices, components, modules, etc., and / or may not include all of the devices, components, modules, etc. discussed in conjunction with the figures. In addition, combinations of these schemes may also be used.

[0196] In addition, in the embodiments of the present application, words such as "exemplarily" and "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of the word "exemplary" is intended to present concepts in a concrete way.

[0197] First, in this application, "used to indicate" may include being used to indicate directly or indirectly. When describing that a certain "information" is used to indicate A, it may include that the information directly indicates A or indirectly indicates A, but it does not mean that the information must contain A.

[0198] The information indicated by a piece of information is called information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated, such as but not limited to, the information to be indicated can be directly indicated, such as the information to be indicated itself or the index of the information to be indicated. The information to be indicated can also be indirectly indicated by indicating other information, wherein there is an association between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while the other parts of the information to be indicated are known or agreed in advance. For example, the indication of specific information can also be achieved with the help of the arrangement order of each piece of information agreed in advance (for example, stipulated by the protocol), thereby reducing the indication overhead to a certain extent. At the same time, the common parts of each piece of information can also be identified and indicated uniformly to reduce the indication overhead caused by indicating the same information separately.

[0199] In addition, the specific indication method may also be various existing indication methods, such as but not limited to the above-mentioned indication methods and various combinations thereof. The specific details of the various indication methods can refer to the prior art and will not be repeated herein. As can be seen from the above, for example, when it is necessary to indicate multiple information of the same type, different indication methods may be used for different information. In the specific implementation process, the desired indication method can be selected according to specific needs. The embodiment of the present application does not limit the selected indication method. In this way, the indication method involved in the embodiment of the present application should be understood to cover various methods that can enable the party to be indicated to obtain the information to be indicated.

[0200] The information to be indicated can be sent as a whole, or divided into multiple sub-information and sent separately, and the sending period and / or sending time of these sub-information can be the same or different. The specific sending method is not limited in this application. Among them, the sending period and / or sending time of these sub-information can be pre-defined, for example, pre-defined according to the protocol, or can be configured by the transmitting device by sending configuration information to the receiving device. Among them, the configuration information can include, for example, but not limited to, one or a combination of at least two of radio resource control (RRC) signaling, medium access control (MAC) layer signaling and physical layer signaling. Among them, MAC layer signaling, for example, includes MAC control element (CE); physical (PHY) layer signaling, for example, includes DCI.

[0201] Second, in the embodiments shown below, the first, second and various digital numbers are only used for the convenience of description and are not used to limit the scope of the embodiments of the present application. For example, to distinguish different indication information.

[0202] Third, "pre-definition" or "pre-configuration" can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in a device (for example, including a terminal device and a network device), and the present application does not limit its specific implementation method. Among them, "saving" can mean saving in one or more memories. The one or more memories can be set separately or integrated in an encoder or decoder, a processor, or a communication device. The one or more memories can also be partially set separately and partially integrated in a decoder, a processor, or a communication device. The type of memory can be any form of storage medium, which is not limited by the present application.

[0203] Fourth, the "protocol" involved in the embodiments of the present application may refer to a standard protocol in the field of communications, for example, it may include 3GPP's LTE protocol (such as the TS36 series of technical specifications), NR protocol (such as the TS38 series of technical specifications) and related protocols used in future communication systems, which is not limited in this application.

[0204] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. A person of ordinary skill in the art can appreciate that with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0205] To facilitate understanding of the embodiments of the present application, first Fig.11 The communication system shown in the example is used to describe in detail the communication system applicable to the embodiment of the present application. Fig.11 A schematic diagram of the architecture of a communication system applicable to the method provided in an embodiment of the present application.

[0206] like Fig.11 As shown, the communication system includes network equipment and terminal equipment.

[0207] Exemplarily, the network device may include network devices 1101a to 1101c, and the terminal device may include terminal devices 1102a to 1102f. The terminal device may be connected to the network device in a wireless manner, and the network device may be connected to the core network ( Fig.11 connected to the PCB (not shown).

[0208] The terminal device may be a terminal with transceiver functions, or may be a chip or chip system provided in the terminal device. The terminal device may also be called user equipment (UE), access terminal, subscriber unit, subscriber station, mobile station (MS), mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal device in the embodiments of the present application can be a mobile phone, a cellular phone, a smart phone, a tablet computer, a wireless data card, a personal digital assistant (PDA), a wireless modem, a handset, a laptop computer, a machine type communication (MTC) terminal, a computer with wireless transceiver function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, a smart home device (for example, a refrigerator, a television, an air conditioner, an electric meter, etc.), an intelligent robot, a robotic arm, a workshop equipment, a wireless terminal in unmanned driving, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in telemedicine, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, a vehicle-mounted terminal, a roadside unit with terminal function, and a wireless terminal in a smart city. unit, RSU), etc., flying equipment (for example, intelligent robots, hot air balloons, drones, airplanes), etc. The terminal device of the present application may also be an on-board module, on-board module, on-board component, on-board chip or on-board unit that is built into the vehicle as one or more components or units. The terminal device may also be other devices with terminal functions. For example, the terminal device may also be a device that serves as a terminal function in D2D communication. The embodiments of the present application do not limit the device form of the terminal device. The device for realizing the function of the terminal device may be a terminal device; it may also be a device that can support the terminal device to realize the function, such as a chip system. The device may be installed in the terminal device or used in combination with the terminal device. In the embodiments of the present application, the chip system may be composed of chips, or may include chips and other discrete devices.

[0209] The network device may be a device with wireless transceiver functions, or may be a chip or chip system provided in the device, located in the access network (AN) of the communication system, and used to provide access services for the terminal. For example, the network device may be referred to as a radio access network device (RAN), and may specifically be a next-generation mobile communication system, such as a 6G access network device, such as a 6G base station, or in the next-generation mobile communication system, the network device may also have other naming methods, which are all included in the protection scope of the embodiments of the present application, and the present application does not make any limitation on this. Alternatively, the network device may also include 5G, such as a gNB in ​​a new radio (NR) system, or one or a group of antenna panels (including multiple antenna panels) of a base station in 5G, or a network node constituting a gNB, a transmission point (TRP or transmission point, TP) or a transmission measurement function (TMF), such as a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), an RSU with base station function, or a wired access gateway, or a core network element of 5G. Alternatively, the network device may also include: an access point (AP) in a wireless fidelity (WiFi) system, a wireless relay node, a wireless backhaul node, various forms of macro base stations, micro base stations (also called small stations), relay stations, access points, wearable devices, vehicle-mounted devices, etc.

[0210] Among them, CU and DU can be set separately, or can also be included in the same network element, such as a baseband unit (BBU). RU can be included in a radio frequency device or a radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU) or a remote radio head (RRH). It can be understood that the network device can be a CU node, a DU node, or a device including a CU node and a DU node. In addition, CU can be divided into a network device in an access network RAN, or CU can be divided into a network device in a core network CN, which is not limited here. In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in an ORAN system, CU can also be called O-CU (open CU), DU can also be called O-DU, CU-CP can also be called O-CU-CP, CU-UP can also be called O-CU-UP, and RU can also be called O-RU. For the convenience of description, CU, CU-CP, CU-UP, DU and RU are used as examples in this application. Any unit in the CU (or CU-CP, CU-UP), DU and 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. In the embodiment of the present application, the form of the network device is not limited. The device for implementing the function of the network device may be a network device; it may also be a device that can support the network device to implement the function, such as a chip system. The device can be installed in a network device or used in combination with a network device.

[0211] Understandable, Fig.11 In , the roles of network devices and terminal devices can be relative, for example, Fig.11 The terminal device 1102d in the example can be configured as a mobile base station. For the terminal device 1102e or the terminal device 1102f that accesses the network device (any one of the network devices 1101a to 1101c) through the terminal device 1102d, the terminal device 1102d is a network device. For the network device (any one of the network devices 1101a to 1101c), the terminal device 1102d is a terminal device.

[0212] In the embodiments of the present application, both the network device and the terminal device may be collectively referred to as a communication device. Fig.11 The network devices 1101a to 1101c in the embodiment may be referred to as communication devices having network device functions. Fig.11The terminal devices 1102a to 1102f in the embodiment can be referred to as communication devices having terminal device functions.

[0213] It should be understood that Fig.11 This is a simplified schematic diagram for ease of understanding only. The communication system may also include other network devices and / or other terminal devices. Fig.11 Not drawn in.

[0214] In order to solve the problem of being unable to obtain channel state information of the complete spatial dimension, an embodiment of the present application provides a channel measurement method, which can increase the number of CSI-RS ports in the CSI-RS resource used to obtain channel state information. For example, a network device sends a first message to a terminal device. Among them, the first information is used to indicate the CSI-RS resources occupied by the CSI-RS. Among them, the CSI-RS resources occupied by the CSI-RS meet one or more of the following: the CSI-RS resources occupied by the CSI-RS include a first CSI-RS resource, and the RB set occupied by the first CSI-RS resource corresponds to multiple orthogonal codes. Or, the CSI-RS resources occupied by the CSI-RS include a second CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the second CSI-RS resource includes the starting time domain position in the first set and the starting time domain position in the second set, and the first set and the second set both include at least one starting time domain position, and any starting time domain position in the second set is different from the starting time domain position in the first set. Or, the CSI-RS resources occupied by the CSI-RS include multiple CSI-RS resources. Alternatively, the CSI-RS resources occupied by the CSI-RS include a third CSI-RS resource, and different port sets of the third CSI-RS resource correspond to different RB sets. The network device sends the CSI-RS to the terminal device on the CSI-RS resources occupied by the CSI-RS. After receiving the CSI-RS, the terminal device can obtain the CSI and send the CSI to the network device. In this way, more complete channel state information in the spatial dimension can be obtained.

[0215] It is understandable that the channel state information measurement method provided in the embodiment of the present application can be applied to Fig.11 For the specific implementation between the terminal device and the network device shown, reference can be made to the following method embodiments, which will not be repeated here.

[0216] It is understandable that the solutions in the embodiments of the present application can also be applied to other communication systems, and the corresponding names can also be replaced by the names of corresponding functions in other communication systems. Fig.11 This is a simplified schematic diagram for ease of understanding only. The communication system may also include other network devices and / or other terminal devices. Fig.11 Not drawn in.

[0217] The following will be combined Figure 12-Figure 24 The channel measurement method provided in the embodiment of the present application is described in detail.

[0218] For example, Fig.12 A schematic diagram of a flow chart of a channel measurement method provided in an embodiment of the present application. The channel measurement method can be applied to Fig.11 Communication between terminal devices and network devices is shown.

[0219] like Fig.12 As shown, the channel measurement method includes the following steps:

[0220] S1201, a network device sends first information to a terminal device. Correspondingly, the terminal device receives the first information from the network device.

[0221] The first information is used to indicate the CSI-RS resource occupied by the CSI-RS. In this embodiment, the CSI-RS resource indicated by the first information includes a first CSI-RS resource, and the RB set occupied by the CSI-RS in the first CSI-RS resource corresponds to multiple orthogonal codes.

[0222] The RB set occupied by the first CSI-RS resource includes at least two RBs.

[0223] Among the multiple orthogonal codes corresponding to the RB set occupied by the first CSI-RS resource, each orthogonal code corresponding to the RB set occupied by the first CSI-RS resource can also be called an RB-level OCC. In other words, the first CSI-RS resource corresponds to multiple RB-level OCCs.

[0224] Among the multiple RB-level OCCs corresponding to the first CSI-RS resource, any two RB-level OCCs are orthogonal to each other.

[0225] For example, assuming that the first CSI-RS resource corresponds to 2 RB-level OCCs, the 2 RB-level OCCs corresponding to the first CSI-RS resource may include: [+1,+1] and [+1,-1]. Among them, [+1,+1] and [+1,-1] are mutually orthogonal. For another example, assuming that the first CSI-RS resource corresponds to 4 RB-level OCCs, the 4 RB-level OCCs corresponding to the first CSI-RS resource may include: [+1,+1,+1,+1], [+1,-1,+1,-1], [+1,+1,-1,-1] and [+1,-1,-1,+1], among which any two RB-level OCCs are mutually orthogonal.

[0226] The number of RB-level OCCs corresponding to the first CSI-RS resource is related to the number of RBs in the RB set, or the number of RB-level OCCs corresponding to the first CSI-RS resource is related to the length of the OCC sequence. Among them, the number of elements of the RB-level OCC is related to the number of RB-level OCCs. Therefore, the number of elements of the RB-level OCC corresponding to the first CSI-RS resource is related to the number of RBs in the RB set, or the number of elements of the RB-level OCC corresponding to the first CSI-RS resource is related to the length of the OCC sequence. It can be understood that there is a corresponding relationship between the number of CSI-RS ports in the first CSI-RS resource and one or more of the following: the number of CDM groups in the RB occupied by the first CSI-RS resource, the CDM type of the CSI-RS in the first CSI-RS resource, or the number of RBs occupied by the first CSI-RS resource.

[0227] For example, the number of CSI-RS ports in the first CSI-RS resource may satisfy the relationship shown in the following formula (5):

[0228] P=c*d*r Formula (5)

[0229] Wherein, P is the number of CSI-RS ports in the first CSI-RS resource, c is the number of CDM groups in the RB occupied by the first CSI-RS resource, and d is the number of REs multiplexed in each CDM group in the CDM type of the CSI-RS in the first CSI-RS resource. r is the number of RBs occupied by the first CSI-RS resource. P, c, d, and r are all positive integers.

[0230] The relationship shown in the above formula (5) is only for example. In actual implementation, there may be other corresponding relationships. For example, when the two RBs occupied by the first CSI-RS resource correspond to one element of the RB-level OCC code, the number of CSI-RS ports in the first CSI-RS resource can satisfy the relationship shown in the following formula (6):

[0231] P=c*d*r / s Formula (6)

[0232] Wherein, s is the number of RBs corresponding to an RB-level OCC, and s is a positive integer. It can be understood that an RB-level OCC of the first CSI-RS resource corresponds to one or more ports of the first CSI-RS resource. Each RB occupied by the first CSI-RS resource corresponds to an element of the RB-level OCC. The following describes the ports of the CSI-RS in the first CSI-RS resource in conjunction with the RB-level OCC corresponding to the first CSI-RS resource.

[0233] Assuming that the number of CSI-RS ports in the first CSI-RS resource is 48, the number of RB-level OCCs corresponding to the first CSI-RS resource may be 2, namely [+1,+1] and [+1,-1]. In this case, the correspondence between the RB-level OCC corresponding to the first CSI-RS resource and the CSI-RS port in the first CSI-RS resource.

[0234] Table 14

[0235]

[0236]

[0237] If the CDM groups in the two RBs occupied by the first CSI-RS resource include CDM groups 0 to CDM groups 11, assuming that in each RB, the REs occupied by the CDM groups are as follows: Figure 8 As shown in (a) of FIG. 14 , the ports distinguished by the combination of RB-level OCC and CDM group are shown in Table 14. In this case, the relationship between the RB occupied by the first CSI-RS resource, the RE occupied by the CDM group in the RB, the RB-level OCC [+1, +1] and the port is shown in FIG. Fig.13 In this case, the relationship between the RB occupied by the first CSI-RS resource, the RE occupied by the CDM group in the RB, the RB-level OCC [+1, -1] and the port is shown in FIG. Fig.13 As shown in (b) in the figure. The same CDM group in different RBs and the same RB-level OCC correspond to ports that can be distinguished by the CDM group. For example, the combination of CDM group 0 in RB0, CDM group 0 in RB1, and RB-level OCC [+1, +1] corresponds to port 0 and port 1. The combination of CDM group 0 in RB0, CDM group 0 in RB1, and RB-level OCC [+1, -1] corresponds to port 24 and port 25.

[0238] Assuming that the number of CSI-RS ports in the first CSI-RS resource is 96, then the number of RB-level OCCs corresponding to the first CSI-RS resource may be 4, such as the RB-level OCCs corresponding to the first CSI-RS resource may include [+1,+1,+1,+1], [+1,-1,+1,-1], [+1,+1,-1,-1] and [+1,-1,-1,+1]. In this case, the correspondence between the RB-level OCCs corresponding to the first CSI-RS resource and the ports of CSI-RS in the first CSI-RS resource is shown in Table 15. In this case, the relationship between the RBs occupied by the first CSI-RS resource, the REs occupied by the CDM groups in the RBs, the RB-level OCCs and the ports is similar to that when there are 48 ports. For example, the ports distinguished by the combination of the RB-level OCCs and the CDM groups are similar to those when there are 48 ports, and reference may be made to the relevant introduction in Table 14. A schematic diagram of the relationship between the RBs occupied by the first CSI-RS resource, the REs occupied by the CDM groups in the RBs, the RB-level OCCs and the ports may be referred to. Fig.13 The relevant introduction will not be repeated here.

[0239] Table 15

[0240]

[0241] It can be understood that the correspondence between the RB-level OCC and the set of the first CSI-RS resources in Table 14 and Table 15 is only for example. In actual implementation, the correspondence between the RB-level OCC and the ports of the CSI-RS in the first CSI-RS resource in Table 14 or Table 15 can be interchanged. For example, in Table 14, the RB-level OCC [+1, +1] can correspond to port 24-port 47, and the RB-level OCC [+1, -1] can correspond to port 0-port 23, which will not be repeated here.

[0242] For example, the number of CSI-RS ports in the first CSI-RS resource can be 64, and the relationship between the RB occupied by the first CSI-RS resource, the RE occupied by the CDM group in the RB, the RB-level OCC and the port is similar to the case where the number of CSI-RS ports in the first CSI-RS resource is 48, and will not be repeated here.

[0243] In a possible design, the first information includes: a plurality of orthogonal codes corresponding to the RB set occupied by the first CSI-RS resource. In other words, the first information indicates a plurality of orthogonal codes corresponding to the RB set occupied by the first CSI-RS resource.

[0244] In some possible design schemes, the multiple orthogonal codes corresponding to the RB set occupied by the first CSI-RS resource may also be predefined by the protocol, or the multiple orthogonal codes corresponding to the RB set occupied by the first CSI-RS resource are preconfigured in the network device and the terminal device.

[0245] In addition, the first information may also include: in the CSI-RS resources occupied by the CSI-RS, one or more of the following for each CSI-RS resource: the number of ports corresponding to the RB where the CSI-RS resource is located, the CDM type of the CSI-RS in the CSI-RS resource, the frequency domain density of the CSI-RS resource, the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource.

[0246] In the embodiment of the present application, the first information includes multiple orthogonal codes corresponding to the RB set occupied by the first CSI-RS resource, so as to distinguish multiple groups of port sets through multiple orthogonal code pairs, thereby improving resource utilization.

[0247] In this way, the first information can indicate the first CSI-RS resource through multiple orthogonal codes and one or more of the following: the number of CSI-RS ports in each CSI-RS resource in the CSI-RS resources occupied by the CSI-RS, the CDM type of the CSI-RS in the CSI-RS resources, the starting time domain position corresponding to the RB where the CSI-RS is located in each CSI-RS resource, and the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in each CSI-RS resource.

[0248] It is understandable that the CSI-RS resources occupied by the CSI-RS may also include CSI-RS resources other than the first CSI-RS resources. In this case, the first information may also be used to indicate the resources other than the first CSI-RS resources in the CSI-RS resources occupied by the CSI-RS. For example, the CSI-RS resources indicated in the above channel measurement configuration information may refer to Figure 1 The relevant introduction in will not be repeated here.

[0249] For the CSI-RS resources occupied by CSI-RS, the number of CSI-RS ports in each CSI-RS resource, the CDM type of the CSI-RS in the CSI-RS resource, the starting time domain position corresponding to the RB where the CSI-RS is located in each CSI-RS resource, and the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in each CSI-RS resource, please refer to the relevant introduction in the channel measurement configuration information, which will not be repeated here.

[0250] S1202: The terminal device determines the first CSI-RS resource occupied by the CSI-RS according to the first information.

[0251] It can be understood that in an embodiment of the present application, at least one second combination can be preconfigured in the terminal device. The second combination may include: the number of CSI-RS ports in the CSI-RS resource, the frequency domain density of the CSI-RS resource, the CDM type of the CSI-RS in the CSI-RS resource, the correspondence between the time-frequency positions corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the RB-level OCC. For the specific implementation of the time-frequency position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, please refer to the relevant introduction in the first combination of S102, which will not be repeated here.

[0252] Optionally, the second combination may also include one or more of the following: an index of at least one CDM group corresponding to the CSI-RS resource, an index of a frequency domain unit of RE occupied by CSI-RS in the CSI-RS resource in a CDM group, an index of a time domain unit of RE occupied by CSI-RS resource in a CDM group, or a row index.

[0253] For ease of understanding, the second combination is illustrated below with reference to 48 ports and 64 ports. At this point, the implementation principle of the second combination can be referred to as shown in Table 16 below. Among them, Table 16 takes the case where the CSI-RS resource occupies 2 RBs, the number of CSI-RS ports in the CSI-RS resource is 48 or 64, and the RB-level OCC includes two elements, each element corresponding to one RB as an example. It can be understood that at least one second combination may include the second combination corresponding to any number of rows from row m1 to row m1+5 in Table 16 below. In addition, the second combination in Table 16 is for example only, and at least one second combination may also include other possible second combinations, such as second combinations under more port numbers corresponding to CSI-RS, which will not be repeated here.

[0254] Table 16

[0255]

[0256]

[0257] In the above Table 16, m1 is a positive integer. For example, m1 may be an integer greater than or equal to 19.

[0258] about For k′, l′, k0, k1, k2, k3, k4, l0, l1, please refer to the relevant introduction in Table 1, which will not be repeated here. It can be understood that the above Table 16 is only used for example. In actual implementation, the order of each second combination may be different from that in Table 16, and the row indexes in different second combinations may be interchanged. The total number of ports corresponding to the CSI-RS resources can also be other numbers, such as 96 ports, that is, there can also be other second combinations corresponding to the number of ports, which will not be repeated here.

[0259] The terminal device can determine the second combination based on the number of CSI-RS ports in the CSI-RS resources, the frequency domain density of the CSI-RS resources, the CDM type of the CSI-RS in the CSI-RS resources, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resources, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resources, and then determine the CSI-RS resources based on the second combination.

[0260] The following further illustrates the use of port 48 and port 64.

[0261] As shown in Table 17, it is assumed that the first information indicates: the number of CSI-RS ports in the first CSI-RS resource is 48, the frequency domain density of the first CSI-RS resource is 1 (or 0.5), the CDM type of the CSI-RS in the first CSI-RS resource is 2 ports multiplexed on 2 REs, the starting time domain position corresponding to the RB where the CSI-RS is located in the first CSI-RS resource includes time domain unit 5 and time domain unit 9, and the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the first CSI-RS resource includes frequency domain unit 0, frequency domain unit 2 and frequency domain unit 4.

[0262] Table 17

[0263]

[0264] Then, when the first CSI-RS resource occupies 2 RBs and the RB-level OCC includes [+1,+1] and [+1,-1], the terminal device can determine, based on the first information and the second combination (row m1 in Table 16), that the time-frequency resources occupied by the first CSI-RS resource on the 2 occupied RBs are as follows: Figure 8 The corresponding relationship between the RB-level OCC and the port of the CSI-RS in the first CSI-RS resource is shown in Table 14 above. The relationship diagram between the RB occupied by the first CSI-RS resource, the RE occupied by the CDM group in the RB, the RB-level OCC and the port can be referred to Fig.13The relevant introduction will not be repeated here. As shown in Table 18, it is assumed that the first information indicates: the number of CSI-RS ports in the first CSI-RS resource is 96, the frequency domain density of the first CSI-RS resource is 1 (or 0.5), the CDM type of the CSI-RS in the first CSI-RS resource is 2 ports multiplexed on 2 REs, the starting time domain position corresponding to the RB where the CSI-RS in the first CSI-RS resource is located includes time domain unit 5 and time domain unit 9, and the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the first CSI-RS resource is located includes frequency domain unit 0, frequency domain unit 2 and frequency domain unit 4.

[0265] Table 18

[0266]

[0267] Then, when the 4 RBs occupied by the first CSI-RS resource and the RB-level OCCs include [+1,+1,+1,+1], [+1,-1,+1,-1], [+1,+1,-1,-1] and [+1,-1,-1,+1], the terminal device can determine, based on the first information and the second combination, as shown in the m1th row in Table 16, that the time-frequency resources occupied by the first CSI-RS resource on each RB are Figure 8 As shown in (a) in . Among them, the correspondence between the RB-level OCC and the port set of the CSI-RS in the first CSI-RS resource is shown in the above Table 15. In the embodiment of the present application, the first information can be carried in a high-level signaling, such as RRC signaling or a media access control control element (MAC-CE).

[0268] S1203: The network device determines a first CSI-RS resource occupied by the CSI-RS.

[0269] The second combination may be preconfigured in the network device. The network device may determine the number of ports of the CSI-RS in the CSI-RS resource, the frequency domain density of the CSI-RS resource, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and then determine the second combination according to the number of ports of the CSI-RS in the CSI-RS resource, the frequency domain density of the CSI-RS resource, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and then determine the CSI-RS resource occupied by the CSI-RS according to the second combination.

[0270] For the implementation principle of S1203, please refer to the relevant introduction of S1202, which will not be repeated here.

[0271] Understandable, Fig.12 In the provided method, the execution order of S1201, S1202 and S1203 is not limited. For example, S1203 can be executed before S1201, or S1202 can be executed after S1203, which will not be described in detail here.

[0272] S1204: The network device sends a CSI-RS on the first CSI-RS resource. Correspondingly, the terminal device receives a CSI-RS on the first CSI-RS resource.

[0273] The network device sends CSI-RS on the first CSI-RS resource, which may include: the network device encodes the CSI-RS according to the RB-level OCC and sends the encoded RB-level OCC. The terminal device receives CSI-RS on the CSI-RS resource occupied by the CSI-RS, which may include: the terminal device receives the encoded CSI-RS on the CSI-RS resource occupied by the CSI-RS according to the RB-level OCC, and decodes the encoded CSI-RS according to the RB-level OCC to obtain the CSI-RS.

[0274] For the implementation principle of S1204, please refer to the relevant introduction of S104, which will not be repeated here.

[0275] S1205: The terminal device sends CSI to the network device. Correspondingly, the network device receives the CSI from the terminal device.

[0276] The CSI is obtained by measuring the CSI-RS.

[0277] For the implementation principle of S1205, please refer to the relevant introduction of S105, which will not be repeated here.

[0278] based on Fig.12 In the provided channel measurement method, a terminal device can receive the first information, receive the CSI-RS according to the CSI-RS resources occupied by the CSI-RS indicated by the first information, and perform channel measurement. Among them, the CSI-RS resources occupied by the CSI-RS are the first CSI-RS resources, and the first CSI-RS resources correspond to multiple orthogonal codes. In this way, the total number of ports corresponding to the CSI-RS resources occupied by the CSI-RS can be increased to obtain more complete channel state information in the spatial dimension, thereby improving the accuracy of the channel measurement results.

[0279] In some possible embodiments, the time domain position corresponding to the CSI-RS resource can be increased to increase the time-frequency resources, thereby increasing the number of CSI-RS ports. In this case, the network device can further indicate the starting time domain position and starting frequency domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource in the newly added time-frequency resources in the resource indication method corresponding to Table 1, thereby increasing the number of ports corresponding to the CSI-RS. Fig.14 The channel measurement method in this scenario is described.

[0280] like Fig.14 As shown, the channel measurement method includes:

[0281] S1401, the network device sends first information to the terminal device. Correspondingly, the terminal device receives the first information from the network device.

[0282] The first information is used to indicate the CSI-RS resource occupied by the CSI-RS. In this embodiment, the CSI-RS resource indicated by the first information includes a second CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the second CSI-RS resource includes the starting time domain position in the first set and the starting time domain position in the second set, and the first set and the second set both include at least one starting time domain position, and any starting time domain position in the second set is different from the starting time domain position in the first set.

[0283] For example, the starting time domain position in the first set may be the same as the starting time domain position corresponding to the CDM group in Table 1. The starting time domain position of the second set may be other time domain positions other than the starting time domain position corresponding to the CDM group in Table 1.

[0284] In a possible design scheme, the number of starting time domain positions in the first set and the number of starting time domain positions in the second set are both related to one or more of the following: the number of ports of CSI-RS in the second CSI-RS resource, the CDM type of CSI-RS in the second CSI-RS resource, or the number of starting frequency domain positions of the CDM group corresponding to the RB where the CSI-RS is located in the second CSI-RS resource. In other words, the number of starting time domain positions in the first set and the data of the starting time domain positions in the second set can be determined according to one or more of the following: the number of ports of CSI-RS in the second CSI-RS resource, the CDM type of CSI-RS in the second CSI-RS resource, or the number of starting frequency domain positions of the CDM group corresponding to the RB where the CSI-RS is located in the second CSI-RS resource.

[0285] Optionally, the number of starting time domain positions in the first set and the number of starting time domain positions in the second set are both related to the number of CSI-RS ports in the second CSI-RS resource and the CDM type of CSI-RS in the second CSI-RS resource. In this case, the number of starting time domain positions in the first set and the number of starting time domain positions in the second set can be determined according to the number of CSI-RS ports in the corresponding CSI-RS resource and the CDM type of CSI-RS in the CSI-RS resource in Table 1. For example, when the number of CSI-RS ports in the second CSI-RS resource is 48 and the CDM type of CSI-RS in the second CSI-RS resource is fd-CDM2, the number of starting time domain positions in the first set is 2 and the number of starting time domain positions in the second set is 2. For example, when the number of CSI-RS ports in the second CSI-RS resource is 64 and the CDM type of the CSI-RS in the second CSI-RS resource is cdm8-FD2-TD4, the number of starting time domain positions in the first set is 1, and the number of starting time domain positions in the second set is 1.

[0286] Among them, the first information may indicate one or more of the following to indicate the second CSI-RS resource: the number of CSI-RS ports in the CSI-RS resource, the frequency domain density of the CSI-RS resource, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource.

[0287] The content indicated by the first information is described below in combination with the case where the second CSI-RS resource includes 48 ports or 64 ports.

[0288] Case 1: The number of CSI-RS ports in the second CSI-RS resource is 48, the CDM type of the CSI-RS in the second CSI-RS resource is 2 ports multiplexed on 2 REs, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1 and frequency domain unit k2, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

[0289] Case 2: The number of CSI-RS ports in the second CSI-RS resource is 48, and the CDM type of the CSI-RS in the second CSI-RS resource is 4 ports multiplexed on a total of 4 REs corresponding to 2 frequency domain units and 2 time domain units. The starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1 and frequency domain unit k2, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

[0290] Case 3: The number of CSI-RS ports in the second CSI-RS resource is 48, and the CDM type of CSI-RS in the second CSI-RS resource is 8 ports multiplexed on a total of 8 REs corresponding to 2 frequency domain units and 4 time domain units. The starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1 and frequency domain unit k2, the starting time domain position of the first set includes time domain unit l0, and the starting time domain position of the second set includes time domain unit l1.

[0291] The above cases 1 to 3 can double the time domain position corresponding to the CSI-RS resources occupied by the CSI-RS, thereby indicating the CSI-RS resources of 48 ports.

[0292] Case 4: The number of CSI-RS ports in the second CSI-RS resource is 64, the CDM type of the CSI-RS in the second CSI-RS resource is 2 ports multiplexed on 2 REs, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1, frequency domain unit k2 and frequency domain unit k3, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

[0293] Case 5: The number of CSI-RS ports in the second CSI-RS resource is 64, and the CDM type of the CSI-RS in the second CSI-RS resource is 4 ports multiplexed on a total of 4 REs corresponding to 2 frequency domain units and 2 time domain units. The starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1, frequency domain unit k2 and frequency domain unit k3, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

[0294] Case 6: The number of CSI-RS ports in the second CSI-RS resource is 64, and the CDM type of CSI-RS in the second CSI-RS resource is 8 ports multiplexed on a total of 8 REs corresponding to 2 frequency domain units and 4 time domain units. The starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1, frequency domain unit k2 and frequency domain unit k3, the starting time domain position of the first set includes time domain unit l0, and the starting time domain position of the second set includes time domain unit l1.

[0295] The above cases 4 to 6 can double the time domain position corresponding to the CSI-RS resources occupied by the CSI-RS, thereby indicating the CSI-RS resources of 64 ports.

[0296] In the embodiment of the present application, the first information may be carried in high-layer signaling, such as RRC signaling or MAC-CE.

[0297] S1402, the terminal device determines the second CSI-RS resource occupied by the CSI-RS according to the first information.

[0298] It is understandable that in an embodiment of the present application, a third combination can be configured in the terminal device. Among them, the third combination includes: the number of CSI-RS ports in the CSI-RS resource, the frequency domain density of the CSI-RS resource, the CDM type of the CSI-RS in the CSI-RS resource, and the time-frequency position corresponding to the RB where the CSI-RS is located in the CSI-RS resource. For the specific implementation of the time-frequency position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, please refer to the relevant introduction in the first combination of S102, which will not be repeated here.

[0299] Optionally, the third combination may also include one or more of the following: an index of at least one CDM group corresponding to the CSI-RS resource, an index of a frequency domain unit of RE occupied by CSI-RS in the CSI-RS resource in a CDM group, an index of a time domain unit of RE occupied by CSI-RS resource in a CDM group, or a row index.

[0300] For ease of understanding, the third combination is described below by combining the CSI-RS resources including 48 ports and 64 ports. At this time, the implementation principle of the third combination can be referred to as shown in the following Table 19.

[0301] Table 19

[0302]

[0303] about For k', l', k0, k1, k2, k3, k4, l0, l1, please refer to the relevant introduction in Table 1, which will not be repeated here. In the above Table 19, m1 is a positive integer. For example, m1 can be an integer greater than or equal to 19.

[0304] It is understandable that the above Table 19 is only used as an example. In actual implementation, the order of the third combination may be different from that in Table 19. The row indexes in different third combinations may be interchangeable. The total number of ports corresponding to the CSI-RS resources may also be other numbers, such as 96 ports, that is, there may also be other second combinations corresponding to the number of ports, which will not be repeated here.

[0305] For ease of understanding, the third combination is described below by taking one CSI-RS resource occupying 8 RBs and each RB corresponding to 48 ports as an example.

[0306] Taking k0=0, k1=2, k2=4, k3=6, k4=8, k5=10, l0=5, l1=9 in Table 19 as an example, the third combination of Table 19 is shown in Table 20.

[0307] Table 20

[0308]

[0309]

[0310] The terminal device can determine the second combination based on the number of CSI-RS ports in the CSI-RS resources, the frequency domain density of the CSI-RS resources, the CDM type of the CSI-RS in the CSI-RS resources, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resources, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resources, and then determine the CSI-RS resources occupied by the CSI-RS based on the third combination.

[0311] The following further illustrates the use of port 48 and port 64.

[0312] Assuming that the second CSI-RS resource includes 48 ports, the first information can indicate the second CSI-RS resource by indicating any one of Cases 9-1 to 9-3 in Table 21 below.

[0313] Table 21

[0314]

[0315] Among them, the ports in one RB occupied by the second CSI-RS resources corresponding to each of situations 9-1 to 9-3 in Table 21 are as follows: Fig.15 (a) to Fig.15 As shown in (c) in .

[0316] It is understood that in the above Table 21, ρ can also be 0.5 or other values, which are not limited here. In the two cases of ρ=1 and ρ=0.5, the implementation principle of the RB occupied by the second CSI-RS indicated in any row indicated in the above Table 21 is the same as Fig.10 Similarly, assuming that the second CSI-RS resource includes 64 ports, the first information may indicate the second CSI-RS resource by indicating any one of the following scenarios 10-1 to 10-3 in Table 22.

[0317] Table 22

[0318]

[0319] In this case, the ports in one RB occupied by the second CSI-RS resources corresponding to the situations 10-1 to 10-3 in Table 22 are as follows: Fig.16 (a) to Fig.16 As shown in (c) in .

[0320] It is understood that in the above Table 21 or the above Table 22, ρ can also be 0.5 or other values, which are not limited here. In the two cases of ρ=1 and ρ=0.5, the implementation principle of the RB occupied by the second CSI-RS indicated in any row indicated in the above Table 21 is the same as Fig.10 The same is true in , so I will not repeat it here.

[0321] S1403: The network device determines a second CSI-RS resource occupied by the CSI-RS.

[0322] The third combination can be pre-configured in the network device. The network device can first determine the number of ports of CSI-RS in the CSI-RS resources, the frequency domain density of the CSI-RS resources, the CDM type of the CSI-RS in the CSI-RS resources, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resources, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resources, and then determine the CSI-RS resources occupied by the CSI-RS according to the number of ports of CSI-RS in the CSI-RS resources, the frequency domain density of the CSI-RS resources, the CDM type of the CSI-RS in the CSI-RS resources, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resources, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resources, as well as the third combination.

[0323] For the implementation principle of S1403, please refer to the relevant introduction of S1402, which will not be repeated here.

[0324] Understandable, Fig.14 In the provided method, the execution order of S1401, S1402 and S1403 is not limited. For example, S1403 can be executed before S1401, or S1402 can be executed after S1403, which will not be described in detail here.

[0325] S1404: The network device sends a CSI-RS on the second CSI-RS resource. Correspondingly, the terminal device receives a CSI-RS on the second CSI-RS resource.

[0326] For the implementation principle of S1404, please refer to the relevant introduction of S104 or S1204, which will not be repeated here.

[0327] S1405: The terminal device sends CSI. Correspondingly, the network device receives the CSI from the terminal device.

[0328] The CSI is obtained by measuring the CSI-RS.

[0329] For the implementation principle of S1405, please refer to the relevant introduction of S105, which will not be repeated here.

[0330] based on Fig.14 In the provided channel measurement method, the terminal device can receive the first information, receive the CSI-RS according to the CSI-RS resources occupied by the CSI-RS indicated by the first information, and perform channel measurement. Among them, the CSI-RS resources occupied by the CSI-RS are the second CSI-RS resources, and the starting time domain position of the second CSI-RS resources includes the starting time domain positions in the first set and the second set. In this way, by indicating more starting time domain positions, the total number of ports corresponding to the CSI-RS resources occupied by the CSI-RS can be increased to obtain more complete channel state information in the spatial dimension, thereby improving the accuracy of the channel measurement results.

[0331] In some possible embodiments, during the channel measurement process, the CSI-RS in multiple CSI-RS resources may be measured, so that the number of ports corresponding to the CSI-RS may be increased. In this case, the network device may indicate multiple CSI-RS resources corresponding to the CSI-RS to the terminal device. Fig.17 The channel measurement method in this scenario is described. Fig.17 As shown, the channel measurement method includes:

[0332] S1701, the network device sends first information to the terminal device. Correspondingly, the terminal device receives the first information from the network device.

[0333] The first information is used to indicate the CSI-RS resources occupied by the CSI-RS. In this embodiment, the CSI-RS resources indicated by the first information include multiple CSI-RS resources. That is, the CSI-RS occupies multiple CSI-RS resources. That is, the first information indicates multiple CSI-RS resources occupied by the CSI-RS.

[0334] That is, the first information may be used to indicate each CSI-RS resource among a plurality of CSI-RS resources occupied by the CSI-RS.

[0335] In a possible design scheme, the first information can be used to indicate one or more of the following items of each CSI-RS resource, among the multiple CSI-RS resources occupied by the CSI-RS, to indicate the multiple CSI-RS resources occupied by the CSI-RS: the number of CSI-RS ports in the CSI-RS resource, the frequency domain density of the CSI-RS resource, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource.

[0336] Regarding the implementation principle of each CSI-RS resource among the multiple CSI-RS resources occupied by the CSI-RS, reference may be made to the relevant introduction of the channel measurement configuration information in S101, which will not be repeated here.

[0337] The following example combines the number of CSI-RS ports as 48, then two CSI-RS resources including 24 ports can be configured. At this time, the first information can indicate two CSI-RS resources, such as CSI-RS resource 0 and CSI-RS resource 1. For example, the first information can indicate CSI-RS resource 0 and CSI-RS resource 1 according to the following Table 23. It can be understood that the time domain positions corresponding to the multiple CSI-RS resources indicated by the first information can be located in the same time slot (slot) or in different time slots, which will not be repeated here.

[0338] Table 23

[0339]

[0340] S1702, the terminal device determines a plurality of CSI-RS resources occupied by the CSI-RS according to the first information.

[0341] The first combination may be preconfigured in the terminal device. For the implementation principle of the first combination, reference may be made to the relevant introduction in S102.

[0342] The terminal device may determine each of the multiple CSI-RS resources occupied by the CSI-RS according to the first information. The principle of determining each of the multiple CSI-RS resources occupied by the CSI-RS may refer to the relevant introduction of S102, which will not be repeated here.

[0343] Taking the CSI-RS resources indicated by the first information as CSI-RS resource 0 and CSI-RS resource 1 shown in Table 23 above as an example, in the CSI-RS resource 0 and CSI-RS resource 1 determined by the terminal device, the ports in the RB where the CSI-RS resources are located are as follows: Fig.18 shown.

[0344] S1703: The network device determines a plurality of CSI-RS resources occupied by the CSI-RS.

[0345] The first combination can be preconfigured in the network device, and the network device can first determine the number of ports of CSI-RS in the CSI-RS resource, the frequency domain density of the CSI-RS resource, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and then determine the CSI-RS resources occupied by the CSI-RS according to the number of ports of CSI-RS in the CSI-RS resource, the frequency domain density of the CSI-RS resource, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, as well as the first combination.

[0346] For the implementation principle of S1703, please refer to the relevant introduction of S1702, which will not be repeated here.

[0347] Understandable, Fig.17 In the provided method, the execution order of S1701, S1702 and S1703 is not limited. For example, S1703 can be executed before S1701, or S1702 can be executed after S1703, which will not be described in detail here.

[0348] S1704: The network device sends CSI-RS on multiple CSI-RS resources. Correspondingly, the terminal device receives CSI-RS on multiple CSI-RS resources.

[0349] For the implementation principle of S1704, please refer to the relevant introduction of S104, which will not be repeated here.

[0350] For example, the network device sends CSI-RS on multiple CSI-RS resources occupied by the CSI-RS. Correspondingly, the terminal device receives CSI-RS on multiple CSI-RS resources occupied by the CSI-RS.

[0351] S1705: The terminal device sends CSI. Correspondingly, the network device receives the CSI from the terminal device.

[0352] The CSI is obtained by measuring the CSI-RS.

[0353] For the implementation principle of S1705, please refer to the relevant introduction of S105, which will not be repeated here.

[0354] based on Fig.17 In the provided channel measurement method, a terminal device can receive first information, receive CSI-RS according to the CSI-RS resources occupied by CSI-RS indicated by the first information, and perform channel measurement. Wherein, CSI-RS occupies multiple CSI-RS resources, so that the total number of ports corresponding to the CSI-RS resources occupied by CSI-RS can be increased to obtain more complete channel state information in the spatial dimension, thereby improving the accuracy of the channel measurement result.

[0355] In some possible embodiments, during the channel measurement process, the CSI-RS port in at least one CSI-RS resource occupied by the CSI-RS includes ports of multiple port sets, where different port sets can occupy different RBs. In this case, the port set corresponding to the same CSI-RS resource occupies part of the RB. In this case, the network device can indicate the CSI-RS resource corresponding to the CSI-RS to the terminal device. In this way, the number of ports corresponding to the CSI-RS can be increased. Fig.19 The channel measurement method in this scenario is described. The channel measurement method includes:

[0356] S1901, the network device sends first information to the terminal device. Correspondingly, the terminal device receives the first information from the network device.

[0357] The first information is used to indicate the CSI-RS resource occupied by the CSI-RS. In this embodiment, the CSI-RS resource indicated by the first information includes a third CSI-RS resource, and different port sets of the third CSI-RS resource correspond to different RB sets, that is, different RB sets corresponding to different port sets of the third CSI-RS resource are different.

[0358] Two RB sets being different means that any RB included in each of the two RB sets is different.

[0359] In a possible design scheme, the first information may be used to indicate one or more of the following items of the third CSI-RS resource occupied by the CSI-RS, so as to indicate the third CSI-RS resource: the number of ports of the CSI-RS in the third CSI-RS resource, the frequency domain density of the third CSI-RS resource, the CDM type of the CSI-RS in the third CSI-RS resource, the starting RB corresponding to different port sets of the third CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the third CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS of the third CSI-RS resource is located. The starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS of the third CSI-RS resource is located may be the same or different relative to the RBs corresponding to different port sets. Each port set of the third CSI-RS resource corresponds to an RB set, and the starting RB corresponding to a port set of the third CSI-RS resource can also be said to be the starting RB of the RB set.

[0360] In the embodiment of the present application, the first information may also indicate the starting RB of each port set of the third CSI-RS resource.

[0361] It can be understood that in an embodiment of the present application, there are multiple port sets of CSI-RS in the third CSI-RS resource, wherein each port set of the third CSI-RS resource includes at least one port of the third CSI-RS resource, and any port in different port sets of the third CSI-RS resource is different.

[0362] In a possible design scheme, the frequency domain density of the third CSI-RS resource is less than or equal to the first density threshold.

[0363] Optionally, the first density threshold is 0.5.

[0364] Assume that the number of CSI-RS ports in the third CSI-RS resource is 48, the frequency domain density of the CSI-RS resources is 0.5, the 48 ports of the CSI-RS in the third CSI-RS resource include the ports in port set 1 and the ports in port set 2, the starting frequency domain positions of the CDM group corresponding to the RB where the CSI-RS is located in the third CSI-RS resource include time domain unit 5 and time domain unit 9, the starting time domain positions corresponding to the RB where the CSI-RS is located in the third CSI-RS resource include frequency domain unit 0, frequency domain unit 2 and frequency domain unit 4, the third CSI-RS resource occupies 4 RBs, including RB0 to RB3, the starting RB of port set 0-port set 23 is RB0, and the starting RB of port set 24-port set 47 is RB1, then, the content indicated by the first information is shown in Table 24 below.

[0365] Table 24

[0366]

[0367] Taking the third CSI-RS resource occupying 4 RBs as an example, among the 4 RBs, port 0 to port 23 occupy one RB every two RBs, and port 24 to port 47 occupy one RB every two RBs. Fig. 20 As shown, assuming that the four RBs occupied by the third CSI-RS resource include RB0 to RB3, then, according to Table 24, port 0 to port 23 occupy RB0 and RB2, and port 24 to port 47 occupy RB1 and RB3.

[0368] Optionally, the first information may also be used to indicate that the same port of the third CSI-RS resource corresponds to different RBs in two adjacent CSI-RS measurements. In this way, the overhead may be reduced.

[0369] Furthermore, on the third CSI-RS resource, the RB corresponding to port p in the kth CSI-RS measurement satisfies the relationship shown in the following formula (7):

[0370] P(k,p)=(P(0,p)+k) mod N; (7)

[0371] Wherein, p represents the port index, k represents the kth measurement, P(0,p) represents the starting frequency domain index of port p in the initial CSI-RS measurement, P(k,p) represents the frequency domain index of port p in the kth CSI-RS measurement, N represents a parameter determined according to the frequency domain density of the third CSI-RS resource, and k is a positive integer greater than or equal to 1. For example, N can be the inverse of the frequency domain density. It can be understood that

[0372] The frequency domain index is a frequency domain index in the RB group occupied by the CSI-RS resources, each RB group includes N consecutive RBs. The RB group may be one or more.

[0373] Taking the CSI-RS resource occupying 8 RBs as an example, if the starting RB of port 0 to port 23 is RB3, the starting RB of port 24 to port 47 is RB2, and the frequency domain density of the third CSI-RS resource is 0.25, then in the first CSI-RS measurement to the eighth CSI-RS measurement, the RBs occupied by different port sets are as follows: Fig.21 shown.

[0374] Furthermore, the first information is also used to indicate that the RBs corresponding to two adjacent CSI-RS measurements of the same port of the third CSI-RS resource are discontinuous. In this way, CSI-RSs of more RB numbers can be measured for the same port, thereby further improving the accuracy of the channel measurement result.

[0375] Furthermore, the first information is further used to indicate the number of RBs spaced between RBs occupied by the same port of the third CSI-RS resource in two adjacent CSI-RS measurements.

[0376] In this way, the CSI-RS on more non-continuous RBs can be measured for the same port, and the accuracy of the channel measurement result can be further improved under the frequency-selective channel.

[0377] Take the CSI-RS resource occupying 8 RBs as an example. If in the first measurement, the starting RB of port 0 to port 23 is RB3, and the starting RB of port 24 to port 47 is RB2, and the RBs occupied by the same port set in two adjacent measurements are separated by 1 RB, then from the first CSI-RS measurement to the eighth CSI-RS measurement, the RBs occupied by different port sets are as follows: Fig. 22 shown.

[0378] S1902, the terminal device determines the third CSI-RS resource occupied by the CSI-RS according to the first information.

[0379] In the embodiment of the present application, a fourth combination may be configured in the terminal device, wherein the fourth combination includes: the number of CSI-RS ports in the CSI-RS resource, the frequency domain density of the CSI-RS resource, the CDM type of the CSI-RS in the CSI-RS resource, and the time-frequency position corresponding to the RB where the CSI-RS is located in the CSI-RS resource. In this case, the third CSI-RS resource determined by the terminal device is as follows: Fig. 20 shown.

[0380] S1903: The network device determines a third CSI-RS resource occupied by the CSI-RS.

[0381] The fourth combination can be preconfigured in the network device. The network device can first determine the number of ports of CSI-RS in the CSI-RS resources, the frequency domain density of the CSI-RS resources, the CDM type of the CSI-RS in the CSI-RS resources, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resources, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resources, and then determine the CSI-RS resources occupied by the CSI-RS according to the number of ports of CSI-RS in the CSI-RS resources, the frequency domain density of the CSI-RS resources, the CDM type of the CSI-RS in the CSI-RS resources, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resources, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resources, as well as the fourth combination.

[0382] For the implementation principle of S1903, please refer to the relevant introduction of S1902, which will not be repeated here.

[0383] Understandable, Fig.19 In the provided method, the execution order of S1901, S1902 and S1903 is not limited. For example, S1903 can be executed before S1901, or S1902 can be executed after S1903, which will not be described in detail here.

[0384] S1904: The network device sends a CSI-RS on a third CSI-RS resource. Correspondingly, the terminal device receives a CSI-RS on the third CSI-RS resource.

[0385] For the implementation principle of S1904, please refer to the relevant introduction of S104, which will not be repeated here.

[0386] S1905, the terminal device sends CSI. Correspondingly, the network device receives CSI from the terminal device. The CSI is obtained according to CSI-RS measurement.

[0387] For the implementation principle of S1905, please refer to the relevant introduction of S105, which will not be repeated here.

[0388] based on Fig.19 In the provided channel measurement method, a terminal device can receive first information, receive CSI-RS according to the CSI-RS resources occupied by CSI-RS indicated by the first information, and perform channel measurement. The CSI-RS resources occupied by CSI-RS are third CSI-RS resources, and different port sets in the third CSI-RS resources correspond to different RBs. In this way, the total number of ports corresponding to the CSI-RS resources occupied by CSI-RS can be made closer to the number of transmitting antennas of the network device, so as to obtain more complete channel state information in the spatial dimension, thereby improving the accuracy of the channel measurement results.

[0389] Understandably, the above Fig.12 , Fig.14 , Fig.17 and Fig.19 In the example, the number of CSI-RS ports in the CSI-RS resources is 48, 64 or 96, which is only used for example. In actual implementation, the number of CSI-RS ports can be more, such as 128, 256, etc., which will not be repeated here.

[0390] In addition, in order to allow CSI-RS to correspond to more ports, thereby further improving the accuracy of channel state information, in some possible embodiments, the above Fig.12 , Fig.14 , Fig.17 and Fig.19At least two of the provided methods may be combined, that is, the content indicated by the first information Fig.12 , Fig.14 , Fig.17 and Fig.19 At least two of the provided methods can be combined. In other words, the CSI-RS resources occupied by the CSI-RS satisfy one or more of the following: the CSI-RS resources occupied by the CSI-RS include a first CSI-RS resource, and the resource block RB set occupied by the first CSI-RS resource corresponds to multiple orthogonal codes. Alternatively, the CSI-RS resources occupied by the CSI-RS include a second CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the second CSI-RS resource includes the starting time domain position in the first set and the starting time domain position in the second set, and the first set and the second set both include at least one starting time domain position, and any starting time domain position in the second set is different from the starting time domain position in the first set. Alternatively, the CSI-RS resources occupied by the CSI-RS include multiple CSI-RS resources. Alternatively, the CSI-RS resources occupied by the CSI-RS include a third CSI-RS resource, and different port sets of the third CSI-RS resource correspond to different RB sets. In this way, the number of ports can be further increased, that is, the number of ports of the CSI-RS in the CSI-RS resources can be more than Fig.12 , Fig.14 , Fig.17 and Fig.19 The number of ports in either method is increased more. The following is a further explanation based on the specific method:

[0391] Method 1: Fig.12 The solutions provided and Fig.14 The solution is combined with RB-level OCC and additional time domain resources.

[0392] For the specific implementation of method 1, please refer to Fig.12 The solutions provided and Fig.14Relevant introduction to the provided solution. Taking an RB set occupied by a CSI-RS resource including 2 RBs as an example, and RB-level OCC as an example, the number of ports corresponding to an RB-level OCC and an RB set is 48, among which the frequency domain density of the CSI-RS resource, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource are shown in the second row of Table 21, and the RB-level OCC includes: [+1,+1] and [+1,-1]. At this time, the number of ports of the CSI-RS in the CSI-RS resource, the frequency domain density of the CSI-RS resource, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource indicated by the first information are shown in Table 25 below.

[0393] Table 25

[0394]

[0395] It can be seen that the number of CSI-RS ports in the CSI-RS resource indicated in Table 25 is twice the number of ports indicated in Table 17. The number of CSI-RS ports in the CSI-RS resource indicated in Table 26 is twice the number of ports indicated in the second row of Table 22.

[0396] Method 2: Fig.12 The plan and Fig.17 The solution is combined with RB-level OCC and increased CSI-RS resources.

[0397] The specific implementation of method 2 can refer to Fig.12 The solutions provided and Fig.17 A description of the solutions provided.

[0398] For example, assuming that the CSI-RS occupies 2 CSI-RS resources, namely CSI-RS resource 0 and CSI-RS resource 1, each CSI-RS resource occupies 2 RBs, each CSI-RS resource includes 48 ports, and the RB-level OCC includes: [+1, +1] and [+1, -1]. At this time, the parameters of each CSI-RS resource in CSI-RS resource 0 and CSI-RS resource 1 indicated by the first information are as shown in Table 26 below: the number of CSI-RS ports, the frequency domain density of the CSI-RS resource, the CDM type of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource.

[0399] Table 26

[0400]

[0401] It can be seen that the number of CSI-RS ports indicated in Table 26 is twice the number of ports indicated in Table 16. The total number of ports of CSI-RS resources indicated in Table 26 is twice the number of ports of CSI-RS in CSI-RS resources indicated in Table 24.

[0402] Method three: Fig.12 The plan and Fig.19 The solution is combined with RB-level OCC and port set combing.

[0403] The specific implementation of method 3 can be referred to Fig.12 The solutions provided and Fig.19 A description of the solutions provided.

[0404] Assume that the first information indicates the port set, X, the CDM type of the CSI-RS in the CSI-RS resource, the frequency domain density of the port of the CSI-RS in the CSI-RS resource, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource as shown in Table 18. The two port sets of the CSI-RS resource each occupy 4 RBs, and the corresponding RB-level OCCs include [+1,+1] and [+1,-1]. In this case, the content indicated by the first information is as shown in Table 27.

[0405] Table 27

[0406]

[0407] Assuming that the CSI-RS resource occupies 8 RBs in total, the first information is as shown in Table 27, then the relationship between each RB and the RB-level OCC is as follows: Fig.23 In the CSI-RS indicated by the first information corresponding to Table 27, the correspondence between the RB set, the port set, the RB-level OCC and the port in the port set of the CSI-RS in the CSI-RS resource is shown in Table 28 below.

[0408] Table 28

[0409]

[0410] Assuming that CSI-RS occupies 8 REs, the REs occupied by CSI-RS in each RB are as follows: Fig.23 shown.

[0411] It can be seen that the total number of ports of the CSI-RS resources indicated in Table 27 is twice the number of ports indicated in Table 17. The total number of ports of the CSI-RS resources indicated in Table 27 is twice the number of ports of the CSI-RS in the CSI-RS resources indicated in Table 24. In other words, the number of ports of the CSI-RS in Mode 3 is Fig.12 The number of CSI-RS ports in the solution shown is multiple, such as 2 times. The number of CSI-RS ports in the third method is Fig.19 A multiple of the number of CSI-RS ports, such as 2 times.

[0412] Method 4: Fig.14 The plan and Fig.17 That is, adding time domain resources is combined with increasing CSI-RS resources.

[0413] For specific implementation of method 4, please refer to Fig.14 The solutions provided and Fig.17 The relevant introduction of the provided solution is not repeated here. In this case, the number of CSI-RS ports in method 4 is Fig.14 The number of CSI-RS ports in the solution shown is multiple, such as 2 times. The number of CSI-RS ports in the fourth method is Fig.17 A multiple of the number of CSI-RS ports, such as 2 times.

[0414] Method five, Fig.14 The plan and Fig.19 The solution is combined with the new time domain resources and port set combing.

[0415] The specific implementation of method 5 can refer to Fig.14 The solutions provided and Fig.19 The relevant introduction of the provided solution is not repeated here. In this case, the number of CSI-RS ports in method 5 is Fig.14The number of CSI-RS ports in the solution shown is multiple, such as 2 times. The number of CSI-RS ports in the fourth method is Fig.19 A multiple of the number of CSI-RS ports, such as 2 times.

[0416] Method six, Fig.17 The plan and Fig.19 The solution is combined with the increase of CSI-RS resources and port set combing.

[0417] The specific implementation of method 6 can refer to Fig.17 The solutions provided and Fig.19 A description of the solutions provided.

[0418] Taking the number of ports in a RB where a CSI-RS is located as 24 as an example, it is assumed that two CSI-RS resources are configured, namely CSI-RS resource 2 and CSI-RS resource 3, wherein the two resources indicated by the first information are shown in the following Table 29. In this case, the REs occupied by the CSI-RS are as follows Fig.24 shown.

[0419] Table 29

[0420]

[0421] Method seven, Fig.12 The solutions provided, Fig.14 The solutions provided and Fig.17 A combination of solutions is provided.

[0422] The specific implementation of method 7 can be referred to Fig.12 The solutions provided, Fig.14 The solutions provided and Fig.17 The relevant introduction of the provided solution is not repeated here. In this case, the number of CSI-RS ports in method 7 is 12, Fig.14 and Fig.17 Any of the above schemes may provide multiple times the number of CSI-RS ports, such as 3 times or 4 times.

[0423] Method eight, Fig.12 The solutions provided, Fig.14 The solutions provided and Fig.19 A combination of solutions is provided.

[0424] The specific implementation of method 8 can be referred to Fig.12 The solutions provided, Fig.14 The solutions provided and Fig.19 The relevant introduction of the provided solution is not repeated here. In this case, the number of CSI-RS ports in method eight is Fig.12 , Fig.14 and Fig.19 A multiple of the number of CSI-RS ports in any of the provided solutions, such as 3 times or 4 times.

[0425] Method nine, Fig.12 The solutions provided, Fig.17 The solutions provided and Fig.19 A combination of solutions is provided.

[0426] For the specific implementation of method nine, please refer to Fig.12 The solutions provided, Fig.17 The solutions provided and Fig.19 The relevant introduction of the provided solution is not repeated here. In this case, the number of CSI-RS ports in method nine is Fig.12 , Fig.17 and Fig.19 A multiple of the number of CSI-RS ports in any of the provided solutions, such as 3 times or 4 times.

[0427] Method 10: Fig.14 The solutions provided, Fig.17 The solutions provided and Fig.19 A combination of solutions is provided.

[0428] The specific implementation of method 10 can refer to Fig.12 The solutions provided, Fig.17 The solutions provided and Fig.19 The relevant introduction of the provided solution is not repeated here. In this case, the number of CSI-RS ports in the tenth method is Fig.12 , Fig.17 and Fig.19 Any of the above schemes may provide multiple times the number of CSI-RS ports, such as 3 times or 4 times.

[0429] Method 11, Fig.12 The solutions provided, Fig.14 The solutions provided, Fig.17 The solutions provided and Fig.19 A combination of solutions is provided.

[0430] The specific implementation of method 11 can refer to Fig.12 The solutions provided, Fig.14 The solutions provided, Fig.17 The solutions provided and Fig.19 The relevant introduction of the provided solution is not repeated here. In this case, the number of CSI-RS ports in the tenth method is Fig.12 , Fig.14 , Fig.17 and Fig.19 Any one of the drag-providing solutions provides multiple times the number of CSI-RS ports, such as 4 times.

[0431] In summary, in the channel measurement method provided in the embodiment of the present application, the terminal device can receive the first information, and the first information can indicate the CSI-RS resources occupied by the CSI-RS, wherein the CSI-RS resources occupied by the CSI-RS correspond to multiple orthogonal codes, and / or the starting time domain position includes the starting time domain position in the first set and the second set, and / or the CSI-RS resources occupied by the CSI-RS include multiple CSI-RS resources, and / or different port sets correspond to different RBs, which can make the number of ports corresponding to the CSIRS larger and closer to the number of transmitting antennas of the network device. In this case, performing channel measurement according to the CSI-RS can make the channel measurement result more accurate, so that more complete channel state information in the spatial dimension can be obtained, thereby improving the accuracy of the channel state information.

[0432] Combination of the above Figure 12-Figure 24 The channel measurement method provided in the embodiment of the present application is described in detail. Figure 25-26 A communication device for executing the channel measurement method provided in an embodiment of the present application is described in detail.

[0433] For example, Fig.25 Schematic diagram of a communication device provided in an embodiment of the present application. Fig.25 As shown, the communication device 2500 includes: a processing module 2501 and a transceiver module 2502. For ease of description, Fig.25 Only the main components of the communication device 2500 are shown.

[0434] In some embodiments, the communication device 2500 may be adapted to Fig.11 In the communication system shown in FIG. , execution Fig.12 , Fig.14 , Fig.17 or Fig.19 Functions of the terminal device in the channel measurement method shown in .

[0435] Among them, the transceiver module 2502 is used to receive first information from the network device; wherein the first information is used to indicate the CSI-RS resources occupied by the CSI-RS; wherein the CSI-RS resources occupied by the CSI-RS meet one or more of the following: the CSI-RS resources occupied by the CSI-RS include the first CSI-RS resources, and the RB set occupied by the first CSI-RS resources corresponds to multiple orthogonal codes; or, the CSI-RS resources occupied by the CSI-RS include the second CSI-RS resources, and the starting time domain position corresponding to the RB where the CSI-RS is located in the second CSI-RS resource includes the starting time domain position in the first set and the starting time domain position in the second set, and the first set and the second set both include at least one starting time domain position, and any starting time domain position in the second set is different from the starting time domain position in the first set; or, the CSI-RS resources occupied by the CSI-RS include multiple CSI-RS resources; or, the CSI-RS resources occupied by the CSI-RS include the third CSI-RS resources, and different port sets of the third CSI-RS resources correspond to different RB sets.

[0436] The transceiver module 2502 is further configured to receive a CSI-RS from a network device on the CSI-RS resource occupied by the CSI-RS.

[0437] The processing module 2501 is further configured to generate CSI, wherein the CSI is obtained according to CSI-RS measurement.

[0438] The transceiver module 2502 is also used to send CSI to the network device.

[0439] In a possible design scheme, the first information includes multiple orthogonal codes corresponding to the RB set occupied by the first CSI-RS resource.

[0440] In one possible design scheme, the number of starting time domain positions in the first set and the number of starting time domain positions in the second set are related to one or more of the following: the number of CSI-RS ports in the second CSI-RS resource, the CDM type of the CSI-RS in the second CSI-RS resource, or the number of starting frequency domain positions of the CDM group corresponding to the RB where the CSI-RS is located in the second CSI-RS resource.

[0441] In a possible design scheme, the number of CSI-RS ports in the second CSI-RS resource is 48, the CDM type of the CSI-RS in the second CSI-RS resource is 2 ports multiplexed on 2 REs, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1 and frequency domain unit k2, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

[0442] In one possible design scheme, the number of CSI-RS ports in the second CSI-RS resource is 48, the CDM type of the CSI-RS in the second CSI-RS resource is 4 ports multiplexed on a total of 4 REs corresponding to 2 frequency domain units and 2 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1 and frequency domain unit k2, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

[0443] In one possible design scheme, the number of CSI-RS ports in the second CSI-RS resource is 48, the CDM type of the CSI-RS in the CSI-RS resource is 8 ports multiplexed on a total of 8 REs corresponding to 2 frequency domain units and 4 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1 and frequency domain unit k2, the starting time domain position of the first set includes time domain unit l0, and the starting time domain position of the second set includes time domain unit l1.

[0444] In a possible design scheme, the number of CSI-RS ports in the second CSI-RS resource is 64, the CDM type of the CSI-RS in the second CSI-RS resource is 2 ports multiplexed on 2 REs, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1, frequency domain unit k2 and frequency domain unit k3, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

[0445] In one possible design scheme, the number of CSI-RS ports in the second CSI-RS resource is 64, the CDM type of the CSI-RS in the second CSI-RS resource is 4 ports multiplexed on a total of 4 REs corresponding to 2 frequency domain units and 2 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1, frequency domain unit k2 and frequency domain unit k3, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

[0446] In one possible design scheme, the number of CSI-RS ports in the second CSI-RS resource is 64, the CDM type of the CSI-RS in the second CSI-RS resource is 8 ports multiplexed on a total of 8 REs corresponding to 2 frequency domain units and 4 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1, frequency domain unit k2 and frequency domain unit k3, the starting time domain position of the first set includes time domain unit l0, and the starting time domain position of the second set includes time domain unit l1.

[0447] In a possible design scheme, the frequency domain density of the third CSI-RS resource is less than or equal to the first density threshold.

[0448] Optionally, the first density threshold is 0.5.

[0449] Optionally, the first information is further used to indicate that the same port of the third CSI-RS resource corresponds to different RBs in two adjacent CSI-RS measurements.

[0450] Further, on the third CSI-RS resource, the RB corresponding to port p in the kth CSI-RS measurement satisfies the following relationship: P(k,p)=(P(0,p)+k)mod N; wherein p represents the port index, k is the kth measurement, P(0,p) represents the starting frequency domain index of port p in the initial CSI-RS measurement, P(k,p) is the frequency domain index of port p in the kth CSI-RS measurement, and N represents a parameter determined according to the frequency domain density of the third CSI-RS resource. k is a positive integer greater than or equal to 1.

[0451] Furthermore, the first information is also used to indicate that RBs corresponding to two adjacent CSI-RS measurements on the same port of the third CSI-RS resource are not continuous.

[0452] Furthermore, the first information is further used to indicate the number of RBs spaced between RBs occupied by the same port of the third CSI-RS resource in two adjacent CSI-RS measurements.

[0453] In a possible design scheme, the first information includes one or more of the following items for each CSI-RS resource in the CSI-RS resources occupied by the CSI-RS: the number of ports corresponding to the RB where the CSI-RS resource is located, the CDM type of the CSI-RS in the CSI-RS resource, the starting time domain position corresponding to the RB where the CSI-RS is located in each CSI-RS resource, and the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in each CSI-RS resource.

[0454] Optionally, the transceiver module 2502 may include a receiving module and a sending module ( Fig.25 The transceiver module 2502 is used to implement the sending function and the receiving function of the communication device 2500.

[0455] Optionally, the communication device 2500 may further include a storage module ( Fig.25 (not shown in the figure), the storage module stores a program or instruction. When the processing module 2501 executes the program or instruction, the communication device 2500 can execute Fig.12 , Fig.14 , Fig.17 or Fig.19 The function of the terminal device in the channel measurement method shown in any one of the items.

[0456] It should be understood that the processing module 2501 involved in the communication device 2500 can be implemented by a processor or a processor-related circuit component, which can be a processor or a processing unit; the transceiver module 2502 can be implemented by a transceiver or a transceiver-related circuit component, which can be a transceiver or a transceiver unit.

[0457] It should be noted that the communication device 2500 can be a terminal device, or a chip (system) or other parts or components that can be set in the terminal device, or a device that includes a terminal device, which is not limited in this application.

[0458] In addition, the technical effects of the communication device 2500 can be referred to Fig.12 , Fig.14 , Fig.17 or Fig.19 The technical effects of the channel measurement method shown in any one of the items will not be repeated here.

[0459] In some other embodiments, the communication device 2500 may be suitable for Fig.11 In the communication system shown in FIG. , execution Fig.12 , Fig.14 , Fig.17 or Fig.19 The functions of the network device in the channel measurement method shown in .

[0460] Among them, the processing module 2501 is used to generate first information.

[0461] The transceiver module 2502 is used to send first information to a terminal device; wherein the first information is used to indicate the CSI-RS resources occupied by the CSI-RS; wherein the CSI-RS resources occupied by the CSI-RS satisfy one or more of the following: the CSI-RS resources occupied by the CSI-RS include first CSI-RS resources, and the RB set occupied by the first CSI-RS resources corresponds to multiple orthogonal codes; or, the CSI-RS resources occupied by the CSI-RS include second CSI-RS resources, and the starting time domain position corresponding to the RB where the CSI-RS is located in the second CSI-RS resource includes the starting time domain position in the first set and the starting time domain position in the second set, and the first set and the second set both include at least one starting time domain position, and any starting time domain position in the second set is different from the starting time domain position in the first set; or, the CSI-RS resources occupied by the CSI-RS include multiple CSI-RS resources; or, the CSI-RS resources occupied by the CSI-RS include third CSI-RS resources, and different port sets of the third CSI-RS resources correspond to different RB sets.

[0462] The transceiver module 2502 is further configured to send the CSI-RS to the terminal device on the CSI-RS resources occupied by the CSI-RS.

[0463] The transceiver module 2502 is also used to receive CSI from the terminal device; wherein the CSI is obtained according to CSI-RS measurement.

[0464] In a possible design scheme, the first information includes multiple orthogonal codes corresponding to the RB set occupied by the first CSI-RS resource.

[0465] In one possible design scheme, the number of starting time domain positions in the first set and the number of starting time domain positions in the second set are related to one or more of the following: the number of CSI-RS ports in the second CSI-RS resource, the CDM type of the CSI-RS in the second CSI-RS resource, or the number of starting frequency domain positions of the CDM group corresponding to the RB where the CSI-RS is located in the second CSI-RS resource.

[0466] In a possible design scheme, the number of CSI-RS ports in the second CSI-RS resource is 48, the CDM type of the CSI-RS in the second CSI-RS resource is 2 ports multiplexed on 2 REs, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1 and frequency domain unit k2, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

[0467] In one possible design scheme, the number of CSI-RS ports in the second CSI-RS resource is 48, the CDM type of the CSI-RS in the second CSI-RS resource is 4 ports multiplexed on a total of 4 REs corresponding to 2 frequency domain units and 2 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1 and frequency domain unit k2, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

[0468] In one possible design scheme, the number of CSI-RS ports in the second CSI-RS resource is 48, the CDM type of the CSI-RS in the second CSI-RS resource is 8 ports multiplexed on a total of 8 REs corresponding to 2 frequency domain units and 4 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1 and frequency domain unit k2, the starting time domain position of the first set includes time domain unit l0, and the starting time domain position of the second set includes time domain unit l1.

[0469] In a possible design scheme, the number of CSI-RS ports in the second CSI-RS resource is 64, the CDM type of the CSI-RS in the second CSI-RS resource is 2 ports multiplexed on 2 REs, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1, frequency domain unit k2 and frequency domain unit k3, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

[0470] In one possible design scheme, the number of CSI-RS ports in the second CSI-RS resource is 64, the CDM type of the CSI-RS in the second CSI-RS resource is 4 ports multiplexed on a total of 4 REs corresponding to 2 frequency domain units and 2 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1, frequency domain unit k2 and frequency domain unit k3, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

[0471] In one possible design scheme, the number of CSI-RS ports in the second CSI-RS resource is 64, the CDM type of the CSI-RS in the second CSI-RS resource is 8 ports multiplexed on a total of 8 REs corresponding to 2 frequency domain units and 4 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1, frequency domain unit k2 and frequency domain unit k3, the starting time domain position of the first set includes time domain unit l0, and the starting time domain position of the second set includes time domain unit l1.

[0472] In a possible design scheme, the frequency domain density of the third CSI-RS resource is less than or equal to the first density threshold.

[0473] Optionally, the first density threshold is 0.5.

[0474] Optionally, the first information is further used to indicate that the same port of the third CSI-RS resource corresponds to different RBs in two adjacent CSI-RS measurements.

[0475] Further, on the third CSI-RS resource, the RB corresponding to port p in the kth CSI-RS measurement satisfies the following relationship: P(k,p)=(P(0,p)+k)mod N; wherein p represents the port index, k is the kth measurement, P(0,p) represents the starting frequency domain index of port p in the initial CSI-RS measurement, P(k,p) is the frequency domain index of port p in the kth CSI-RS measurement, and N represents a parameter determined according to the frequency domain density of the third CSI-RS resource. k is a positive integer greater than or equal to 1.

[0476] Furthermore, the first information is also used to indicate that RBs corresponding to two adjacent CSI-RS measurements on the same port of the third CSI-RS resource are not continuous.

[0477] Furthermore, the first information is further used to indicate the number of RBs spaced between RBs occupied by the same port of the third CSI-RS resource in two adjacent CSI-RS measurements.

[0478] In a possible design scheme, the first information includes one or more of the following items for each CSI-RS resource in the CSI-RS resources occupied by the CSI-RS: the number of ports corresponding to the RB where the CSI-RS resource is located, the CDM type of the CSI-RS in the CSI-RS resource, the starting time domain position corresponding to the RB where the CSI-RS is located in each CSI-RS resource, and the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in each CSI-RS resource.

[0479] Optionally, the transceiver module 2502 may include a receiving module and a sending module ( Fig.25 The transceiver module 2502 is used to implement the sending function and the receiving function of the communication device 2500.

[0480] Optionally, the communication device 2500 may further include a storage module ( Fig.25 (not shown in the figure), the storage module stores a program or instruction. When the processing module 2501 executes the program or instruction, the communication device 2500 can execute Fig.12 , Fig.14 , Fig.17 or Fig.19 The function of the network device in the channel measurement method shown in any one of the items.

[0481] It should be understood that the processing module 2501 involved in the communication device 2500 can be implemented by a processor or a processor-related circuit component, which can be a processor or a processing unit; the transceiver module 2502 can be implemented by a transceiver or a transceiver-related circuit component, which can be a transceiver or a transceiver unit.

[0482] It should be noted that the communication device 2500 can be a network device, or a chip (system) or other parts or components that can be set in the network device, or a device that includes a network device, which is not limited in this application.

[0483] In addition, the technical effects of the communication device 2500 can be referred to Fig.12 , Fig.14 , Fig.17 or Fig.19 The technical effects of the channel measurement method shown in any one of the items will not be repeated here.

[0484] For example, Fig.26 This is a schematic diagram of the structure of another communication device provided in an embodiment of the present application. The communication device may be a terminal device or a network device, or may be a chip (system) or other components or assemblies that can be set in the terminal device or the network device. Fig.26As shown, the communication device 2600 may include a processor 2601. Optionally, the communication device 2600 may further include a memory 2602 and / or a transceiver 2603. The processor 2601 is coupled with the memory 2602 and the transceiver 2603, such as being connected via a communication bus.

[0485] Combine the following Fig.26 The components of the communication device 2600 are described in detail:

[0486] The processor 2601 is the control center of the communication device 2600, and may be a processor or a general term for multiple processing elements. For example, the processor 2601 is one or more central processing units (CPUs), or may be an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application, such as one or more digital signal processors (DSPs), or one or more field programmable gate arrays (FPGAs).

[0487] Optionally, the processor 2601 may perform various functions of the communication device 2600 by running or executing a software program stored in the memory 2602 , and calling data stored in the memory 2602 .

[0488] In a specific implementation, as an embodiment, the processor 2601 may include one or more CPUs, such as Fig.26 CPU0 and CPU1 are shown in FIG.

[0489] In a specific implementation, as an embodiment, the communication device 2600 may also include multiple processors, such as Fig.26 2601 and processor 2604 are shown in FIG. Each of these processors may be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). A processor herein may refer to one or more devices, circuits, and / or processing cores for processing data (e.g., computer program instructions).

[0490] Among them, the memory 2602 is used to store the software program that executes the solution of the present application, and the execution is controlled by the processor 2601. The specific implementation method can refer to the above method embodiment and will not be repeated here.

[0491] Optionally, the memory 2602 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory 2602 may be integrated with the processor 2601, or may exist independently and be communicated to the computer through the interface circuit ( Fig.26 ) is coupled to the processor 2601, which is not specifically limited in the embodiment of the present application.

[0492] The transceiver 2603 is used for communication with other communication devices. For example, if the communication device 2600 is a terminal device, the transceiver 2603 can be used to communicate with a network device, or with another terminal device. For another example, if the communication device 2600 is a network device, the transceiver 2603 can be used to communicate with a terminal device, or with another network device.

[0493] Optionally, the transceiver 2603 may include a receiver and a transmitter ( Fig.26 The receiver is used to implement a receiving function, and the transmitter is used to implement a sending function.

[0494] Optionally, the transceiver 2603 may be integrated with the processor 2601, or may exist independently and communicate with the processor 2601 through the interface circuit ( Fig.26 ) is coupled to the processor 2601, which is not specifically limited in the embodiment of the present application.

[0495] It should be noted that Fig.26 The structure of the communication device 2600 shown in the figure does not constitute a limitation on the communication device. The actual communication device may include more or fewer components than those shown in the figure, or combine certain components, or arrange the components differently.

[0496] In addition, the technical effects of the communication device 2600 can refer to the technical effects of the channel measurement method described in the above method embodiment, which will not be repeated here.

[0497] It should be understood that the processor in the embodiment of the present application may be a CPU, and the processor may also be other general-purpose processors, DSPs, ASICs, FPGAs or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0498] It should also be understood that the memory in the embodiment of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memory. Among them, the non-volatile memory can be a ROM, a programmable read-only memory (programmable ROM, PROM), an erasable programmable read-only memory (erasable PROM, EPROM), an EEPROM or a flash memory. The volatile memory can be a RAM, which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (doubledata rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM) and direct memory bus random access memory (direct rambus RAM, DR RAM).

[0499] The above embodiments can be implemented in whole or in part by software, hardware (such as circuits), firmware or any other combination. When implemented using software, the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website site, computer, server or data center to another website site, computer, server or data center by wired (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that contains one or more available media sets. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a tape), an optical medium (for example, a DVD), or a semiconductor medium. The semiconductor medium can be a solid-state hard disk.

[0500] It should be understood that the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. A and B can be singular or plural. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship, but it may also indicate an "and / or" relationship. Please refer to the context for specific understanding.

[0501] In this application, "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can be represented by: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0502] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0503] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0504] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0505] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0506] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0507] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0508] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard drives, ROM, RAM, magnetic disks, or optical disks.

[0509] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A channel measurement method, characterized in that: The method comprises: Receive first information from a network device; the first information is used to indicate a CSI-RS resource occupied by a channel state information reference signal CSI-RS; wherein the CSI-RS resource occupied by the CSI-RS satisfies one or more of the following: The CSI-RS resource occupied by the CSI-RS includes a first CSI-RS resource, and a resource block RB set occupied by the first CSI-RS resource corresponds to a plurality of orthogonal codes; or, The CSI-RS resource occupied by the CSI-RS includes a second CSI-RS resource, the starting time domain position corresponding to the RB where the CSI-RS is located in the second CSI-RS resource includes the starting time domain position in the first set and the starting time domain position in the second set, the first set and the second set each include at least one starting time domain position, and any starting time domain position in the second set is different from the starting time domain position in the first set; or, The CSI-RS resources occupied by the CSI-RS include multiple CSI-RS resources; or, The CSI-RS resources occupied by the CSI-RS include a third CSI-RS resource, and different port sets of the third CSI-RS resource correspond to different RB sets; receiving, on the CSI-RS resource occupied by the CSI-RS, a CSI-RS from the network device; Sending channel state information CSI to the network device; wherein the CSI is obtained according to the CSI-RS measurement.

2. The method according to claim 1, characterized in that The first information includes the multiple orthogonal codes corresponding to the RB set occupied by the first CSI-RS resource.

3. The method according to claim 1, characterized in that The number of starting time domain positions in the first set and the number of starting time domain positions in the second set are both related to one or more of the following: the number of CSI-RS ports in the second CSI-RS resource, the code division multiplexing CDM type of the CSI-RS in the second CSI-RS resource, or the number of starting frequency domain positions of the CDM group corresponding to the RB where the CSI-RS is located in the second CSI-RS resource.

4. The method according to claim 1 or 3, characterized in that: The number of CSI-RS ports in the second CSI-RS resource is 48, the CDM type of the CSI-RS in the second CSI-RS resource is 2 ports multiplexed on 2 resource units RE, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1 and frequency domain unit k2, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

5. The method according to claim 1 or 3, characterized in that: The number of CSI-RS ports in the second CSI-RS resource is 48, the CDM type of the CSI-RS in the second CSI-RS resource is 4 ports multiplexed on a total of 4 REs corresponding to 2 frequency domain units with different frequency domain positions and 2 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the second CSI-RS resource includes frequency domain unit k0, frequency domain unit k1 and frequency domain unit k2, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

6. The method according to claim 1 or 3, characterized in that: The number of CSI-RS ports in the second CSI-RS resource is 48, the CDM type of CSI-RS in the second CSI-RS resource is 8 ports multiplexed on a total of 8 REs corresponding to 2 frequency domain units and 4 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the second CSI-RS resource includes frequency domain unit k0, frequency domain unit k1 and frequency domain unit k2, the starting time domain position of the first set includes time domain unit l0, and the starting time domain position of the second set includes time domain unit l1.

7. The method according to claim 1 or 3, characterized in that: The number of CSI-RS ports in the second CSI-RS resource is 64, the CDM type of CSI-RS in the second CSI-RS resource is 2 ports multiplexed on 2 REs, the frequency domain unit k0, frequency domain unit k1, frequency domain unit k2 and frequency domain unit k3 of the CDM group corresponding to the RB where the second CSI-RS resource is located, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

8. The method according to claim 1 or 3, characterized in that: The number of CSI-RS ports in the second CSI-RS resource is 64, the CDM type of the CSI-RS in the second CSI-RS resource is 4 ports multiplexed on a total of 4 REs corresponding to 2 frequency domain units and 2 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the second CSI-RS resource includes frequency domain unit k0, frequency domain unit k1, frequency domain unit k2 and frequency domain unit k3, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

9. The method according to claim 1 or 3, characterized in that: The number of CSI-RS ports in the second CSI-RS resource is 64, the CDM type of CSI-RS in the second CSI-RS resource is 8 ports multiplexed on a total of 8 REs corresponding to 2 frequency domain units and 4 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the second CSI-RS resource includes frequency domain unit k0, frequency domain unit k1, frequency domain unit k2 and frequency domain unit k3, the starting time domain position of the first set includes time domain unit l0, and the starting time domain position of the second set includes time domain unit l1.

10. The method according to claim 1, characterized in that The frequency domain density of the third CSI-RS resource is less than or equal to a first density threshold.

11. The method according to claim 10, characterized in that The first density threshold is 0.

5.

12. The method according to claim 10 or 11, characterized in that: The first information is further used to indicate that the same port of the third CSI-RS resource corresponds to different RBs in two adjacent CSI-RS measurements.

13. The method according to claim 12, characterized in that On the third CSI-RS resource, the RB corresponding to port p in the kth CSI-RS measurement satisfies the following relationship: P(k,p)=(P(0,p)+k)mod N; Among them, p represents the port index, k is the k-th measurement, P(0,p) represents the starting frequency domain index of port p in the initial CSI-RS measurement, P(k,p) is the frequency domain index of port p in the k-th CSI-RS measurement, N represents a parameter determined according to the frequency domain density of the third CSI-RS resource, and k is a positive integer greater than or equal to 1.

14. The method according to claim 12, characterized in that The first information is further used to indicate that RBs corresponding to two adjacent CSI-RS measurements on the same port of the third CSI-RS resource are discontinuous.

15. The method according to claim 14, characterized in that The first information is further used to indicate the number of RBs spaced between RBs occupied by the same port of the third CSI-RS resource in two adjacent CSI-RS measurements.

16. The method according to any one of claims 1 to 15, characterized in that The first information includes one or more of the following items for each CSI-RS resource in the CSI-RS resources occupied by the CSI-RS: the number of ports corresponding to the RB where the CSI-RS is located, the CDM type of the CSI-RS in the CSI-RS resource, the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource.

17. A channel measurement method, characterized in that: The method comprises: Sending first information to a terminal device; the first information is used to indicate a CSI-RS resource occupied by a channel state information reference signal CSI-RS; wherein the CSI-RS resource occupied by the CSI-RS satisfies one or more of the following: The CSI-RS resource occupied by the CSI-RS includes a first CSI-RS resource, and a resource block RB set occupied by the first CSI-RS resource corresponds to a plurality of orthogonal codes; or, The CSI-RS resource occupied by the CSI-RS includes a second CSI-RS resource, the starting time domain position corresponding to the RB where the CSI-RS is located in the second CSI-RS resource includes the starting time domain position in the first set and the starting time domain position in the second set, the first set and the second set each include at least one starting time domain position, and any starting time domain position in the second set is different from the starting time domain position in the first set; or, The CSI-RS resources occupied by the CSI-RS include multiple CSI-RS resources; or, The CSI-RS resources occupied by the CSI-RS include a third CSI-RS resource, and different port sets of the third CSI-RS resource correspond to different RB sets; Sending a CSI-RS to the terminal device on the CSI-RS resource occupied by the CSI-RS; Receive channel state information CSI from the terminal device; wherein the CSI is obtained according to the CSI-RS measurement.

18. The method according to claim 17, characterized in that The first information includes the multiple orthogonal codes corresponding to the RB set occupied by the first CSI-RS resource.

19. The method according to claim 17, characterized in that The number of starting time domain positions in the first set and the number of starting time domain positions in the second set are both related to one or more of the following: the number of CSI-RS ports in the second CSI-RS resource, the code division multiplexing CDM type of the CSI-RS in the second CSI-RS resource, or the number of starting frequency domain positions of the CDM group corresponding to the RB where the CSI-RS is located in the second CSI-RS resource.

20. The method according to claim 17 or 19, characterized in that The number of CSI-RS ports in the second CSI-RS resource is 48, the CDM type of the CSI-RS in the second CSI-RS resource is 2 ports multiplexed on 2 resource units RE, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1 and frequency domain unit k2, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

21. The method according to claim 17 or 19, characterized in that The number of CSI-RS ports in the second CSI-RS resource is 48, the CDM type of the CSI-RS in the second CSI-RS resource is 4 ports multiplexed on a total of 4 REs corresponding to 2 frequency domain units and 2 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the second CSI-RS resource includes frequency domain unit k0, frequency domain unit k1 and frequency domain unit k2, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

22. The method according to claim 17 or 19, characterized in that The number of CSI-RS ports in the second CSI-RS resource is 48, the CDM type of CSI-RS in the second CSI-RS resource is 8 ports multiplexed on a total of 8 REs corresponding to 2 frequency domain units and 4 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the second CSI-RS resource includes frequency domain unit k0, frequency domain unit k1 and frequency domain unit k2, the starting time domain position of the first set includes time domain unit l0, and the starting time domain position of the second set includes time domain unit l1.

23. The method according to claim 17 or 19, characterized in that The number of CSI-RS ports in the second CSI-RS resource is 64, the CDM type of the CSI-RS in the second CSI-RS resource is 2 ports multiplexed on 2 REs, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1, frequency domain unit k2 and frequency domain unit k3, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

24. The method according to claim 17 or 19, characterized in that The number of CSI-RS ports in the second CSI-RS resource is 64, the CDM type of the CSI-RS in the second CSI-RS resource is 4 ports multiplexed on a total of 4 REs corresponding to 2 frequency domain units and 2 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the second CSI-RS resource includes frequency domain unit k0, frequency domain unit k1, frequency domain unit k2 and frequency domain unit k3, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

25. The method according to claim 17 or 19, characterized in that The number of CSI-RS ports in the second CSI-RS resource is 64, the CDM type of CSI-RS in the second CSI-RS resource is 8 ports multiplexed on a total of 8 REs corresponding to 2 frequency domain units and 4 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the second CSI-RS resource includes frequency domain unit k0, frequency domain unit k1, frequency domain unit k2 and frequency domain unit k3, the starting time domain position of the first set includes time domain unit l0, and the starting time domain position of the second set includes time domain unit l1.

26. The method according to claim 17, characterized in that The frequency domain density of the third CSI-RS resource is less than or equal to a first density threshold.

27. The method according to claim 26, characterized in that The first density threshold is 0.

5.

28. The method according to claim 26 or 27, characterized in that The first information is further used to indicate that the same port of the third CSI-RS resource corresponds to different RBs in two adjacent CSI-RS measurements.

29. The method according to claim 28, characterized in that On the third CSI-RS resource, the RB corresponding to port p in the kth CSI-RS measurement satisfies the following relationship: P(k,p)=(P(0,p)+k)mod N; Among them, p represents the port index, k is the k-th measurement, P(0,p) represents the starting frequency domain index of port p in the initial CSI-RS measurement, P(k,p) is the frequency domain index of port p in the k-th CSI-RS measurement, N represents a parameter determined according to the frequency domain density of the third CSI-RS resource, and k is a positive integer greater than or equal to 1.

30. The method according to claim 28, characterized in that The first information is further used to indicate that RBs corresponding to two adjacent CSI-RS measurements on the same port of the third CSI-RS resource are discontinuous.

31. The method according to claim 30, characterized in that The first information is further used to indicate the number of RBs spaced between RBs occupied by the same port of the third CSI-RS resource in two adjacent CSI-RS measurements.

32. The method according to any one of claims 17 to 31, characterized in that The first information includes one or more of the following items for each CSI-RS resource in the CSI-RS resource occupied by the CSI-RS: the number of ports corresponding to the RB where the CSI-RS resource is located, the CDM type of the CSI-RS in the CSI-RS resource, the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource.

33. A communication device, characterized in that: The device comprises: a processing module and a transceiver module; The transceiver module is configured to receive first information from a network device; wherein the first information is used to indicate a CSI-RS resource occupied by a channel state information reference signal CSI-RS; wherein the CSI-RS resource occupied by the CSI-RS satisfies one or more of the following: The CSI-RS resources occupied by the CSI-RS include a resource block RB set occupied by the first CSI-RS resources corresponding to multiple orthogonal codes; or, The CSI-RS resource occupied by the CSI-RS includes a second CSI-RS resource, the starting time domain position corresponding to the RB where the CSI-RS is located in the second CSI-RS resource includes the starting time domain position in the first set and the starting time domain position in the second set, the first set and the second set each include at least one starting time domain position, and any starting time domain position in the second set is different from the starting time domain position in the first set; or, The CSI-RS resources occupied by the CSI-RS include multiple CSI-RS resources; or, The CSI-RS resources occupied by the CSI-RS include a third CSI-RS resource, and different port sets of the third CSI-RS resource correspond to different RB sets; The transceiver module is further configured to receive a CSI-RS from the network device on the CSI-RS resource occupied by the CSI-RS; The processing module is further used to generate channel state information CSI; wherein the CSI is obtained according to the CSI-RS measurement; The transceiver module is further used to send the CSI to the network device.

34. The device according to claim 33, characterized in that The first information includes the multiple orthogonal codes corresponding to the RB set occupied by the first CSI-RS resource.

35. The device according to claim 33, characterized in that The number of starting time domain positions in the first set and the number of starting time domain positions in the second set are both related to one or more of the following: the number of CSI-RS ports in the second CSI-RS resource, the code division multiplexing CDM type of the CSI-RS in the second CSI-RS resource, or the number of starting frequency domain positions of the CDM group corresponding to the RB where the CSI-RS is located in the second CSI-RS resource.

36. The device according to claim 33 or 35, characterized in that The number of CSI-RS ports in the second CSI-RS resource is 48, the CDM type of the CSI-RS in the second CSI-RS resource is 2 ports multiplexed on 2 resource units RE, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1 and frequency domain unit k2, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

37. The device according to claim 33 or 35, characterized in that The number of CSI-RS ports in the second CSI-RS resource is 48, the CDM type of the CSI-RS in the second CSI-RS resource is 4 ports multiplexed on a total of 4 REs corresponding to 2 frequency domain units and 2 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the second CSI-RS resource includes frequency domain unit k0, frequency domain unit k1 and frequency domain unit k2, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

38. The device according to claim 33 or 35, characterized in that The number of CSI-RS ports in the second CSI-RS resource is 48, the CDM type of CSI-RS in the second CSI-RS resource is 8 ports multiplexed on a total of 8 REs corresponding to 2 frequency domain units and 4 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the second CSI-RS resource includes frequency domain unit k0, frequency domain unit k1 and frequency domain unit k2, the starting time domain position of the first set includes time domain unit l0, and the starting time domain position of the second set includes time domain unit l1.

39. The device according to claim 33 or 35, characterized in that The number of CSI-RS ports in the second CSI-RS resource is 64, the CDM type of the CSI-RS in the second CSI-RS resource is 2 ports multiplexed on 2 REs, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1, frequency domain unit k2 and frequency domain unit k3, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

40. The device according to claim 33 or 35, characterized in that The number of CSI-RS ports in the second CSI-RS resource is 64, the CDM type of the CSI-RS in the second CSI-RS resource is 4 ports multiplexed on a total of 4 REs corresponding to 2 frequency domain units and 2 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the second CSI-RS resource includes frequency domain unit k0, frequency domain unit k1, frequency domain unit k2 and frequency domain unit k3, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

41. The device according to claim 33 or 35, characterized in that The number of CSI-RS ports in the second CSI-RS resource is 64, the CDM type of CSI-RS in the second CSI-RS resource is 8 ports multiplexed on a total of 8 REs corresponding to 2 frequency domain units and 4 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the second CSI-RS resource includes frequency domain unit k0, frequency domain unit k1, frequency domain unit k2 and frequency domain unit k3, the starting time domain position of the first set includes time domain unit l0, and the starting time domain position of the second set includes time domain unit l1.

42. The device according to claim 33, characterized in that The frequency domain density of the third CSI-RS resource is less than or equal to a first density threshold.

43. The device according to claim 42, characterized in that The first density threshold is 0.

5.

44. The device according to claim 42 or 43, characterized in that The first information is further used to indicate that the same port of the third CSI-RS resource corresponds to different RBs in two adjacent CSI-RS measurements.

45. The device according to claim 44, characterized in that On the third CSI-RS resource, the RB corresponding to port p in the kth CSI-RS measurement satisfies the following relationship: P(k,p)=(P(0,p)+k)mod N; Among them, p represents the port index, k is the k-th measurement, P(0,p) represents the starting frequency domain index of port p in the initial CSI-RS measurement, P(k,p) is the frequency domain index of port p in the k-th CSI-RS measurement, N represents a parameter determined according to the frequency domain density of the third CSI-RS resource, and k is a positive integer greater than or equal to 1.

46. ​​The device according to claim 44, characterized in that The first information is further used to indicate that RBs corresponding to two adjacent CSI-RS measurements on the same port of the third CSI-RS resource are discontinuous.

47. The device according to claim 46, characterized in that The first information is further used to indicate the number of RBs spaced between RBs occupied by the same port of the third CSI-RS resource in two adjacent CSI-RS measurements.

48. The device according to any one of claims 33 to 47, characterized in that The first information includes one or more of the following items for each CSI-RS resource in the CSI-RS resources occupied by the CSI-RS: the number of ports corresponding to the RB where the CSI-RS resource is located, the CDM type of the CSI-RS in the CSI-RS resource, the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource.

49. A communication device, characterized in that: The communication device comprises: a processing module and a transceiver module; Wherein, the processing module is used to generate first information; The transceiver module is used to send first information to a terminal device; wherein the first information is used to indicate a CSI-RS resource occupied by a channel state information reference signal CSI-RS; wherein the CSI-RS resource occupied by the CSI-RS satisfies one or more of the following: The CSI-RS resource occupied by the CSI-RS includes a first CSI-RS resource, and a resource block RB set occupied by the first CSI-RS resource corresponds to a plurality of orthogonal codes; or, The CSI-RS resource occupied by the CSI-RS includes a second CSI-RS resource, the starting time domain position corresponding to the RB where the CSI-RS is located in the second CSI-RS resource includes the starting time domain position in the first set and the starting time domain position in the second set, the first set and the second set each include at least one starting time domain position, and any starting time domain position in the second set is different from the starting time domain position in the first set; or, The CSI-RS resources occupied by the CSI-RS include multiple CSI-RS resources; or, The CSI-RS resources occupied by the CSI-RS include a third CSI-RS resource, and different port sets of the third CSI-RS resource correspond to different RB sets; The transceiver module is further configured to send a CSI-RS to the terminal device on the CSI-RS resource occupied by the CSI-RS; The transceiver module is also used to receive channel state information CSI from the terminal device; wherein the CSI is obtained according to the CSI-RS measurement.

50. The device according to claim 49, characterized in that The first information includes the multiple orthogonal codes corresponding to the RB set occupied by the first CSI-RS resource.

51. The device according to claim 49, characterized in that The number of starting time domain positions in the first set and the number of starting time domain positions in the second set are both related to one or more of the following: the number of CSI-RS ports in the second CSI-RS resource, the code division multiplexing CDM type of the CSI-RS in the second CSI-RS resource, or the number of starting frequency domain positions of the CDM group corresponding to the RB where the CSI-RS is located in the second CSI-RS resource.

52. The device according to claim 49 or 51, characterized in that The number of CSI-RS ports in the second CSI-RS resource is 48, the CDM type of the CSI-RS in the second CSI-RS resource is 2 ports multiplexed on 2 resource units RE, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1 and frequency domain unit k2, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

53. The device according to claim 49 or 51, characterized in that The number of CSI-RS ports in the second CSI-RS resource is 48, the CDM type of the CSI-RS in the second CSI-RS resource is 4 ports multiplexed on a total of 4 REs corresponding to 2 frequency domain units and 2 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the second CSI-RS resource includes frequency domain unit k0, frequency domain unit k1 and frequency domain unit k2, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

54. The device according to claim 49 or 51, characterized in that The number of CSI-RS ports in the second CSI-RS resource is 48, the CDM type of CSI-RS in the second CSI-RS resource is 8 ports multiplexed on a total of 8 REs corresponding to 2 frequency domain units and 4 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the second CSI-RS resource includes frequency domain unit k0, frequency domain unit k1 and frequency domain unit k2, the starting time domain position of the first set includes time domain unit l0, and the starting time domain position of the second set includes time domain unit l1.

55. The device according to claim 49 or 51, characterized in that The number of CSI-RS ports in the second CSI-RS resource is 64, the CDM type of the CSI-RS in the second CSI-RS resource is 2 ports multiplexed on 2 REs, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS in the second CSI-RS resource is located includes frequency domain unit k0, frequency domain unit k1, frequency domain unit k2 and frequency domain unit k3, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

56. The device according to claim 49 or 51, characterized in that The number of CSI-RS ports in the second CSI-RS resource is 64, the CDM type of the CSI-RS in the second CSI-RS resource is 4 ports multiplexed on a total of 4 REs corresponding to 2 frequency domain units and 2 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the second CSI-RS resource includes frequency domain unit k0, frequency domain unit k1, frequency domain unit k2 and frequency domain unit k3, the starting time domain position of the first set includes time domain unit l0 and time domain unit l1, and the starting time domain position of the second set includes time domain unit l2 and time domain unit l3.

57. The device according to claim 49 or 51, characterized in that The number of CSI-RS ports in the second CSI-RS resource is 64, the CDM type of CSI-RS in the second CSI-RS resource is 8 ports multiplexed on a total of 8 REs corresponding to 2 frequency domain units and 4 time domain units, the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the second CSI-RS resource includes frequency domain unit k0, frequency domain unit k1, frequency domain unit k2 and frequency domain unit k3, the starting time domain position of the first set includes time domain unit l0, and the starting time domain position of the second set includes time domain unit l1.

58. The device according to claim 49, characterized in that The frequency domain density of the third CSI-RS resource is less than or equal to a first density threshold.

59. The device according to claim 58, characterized in that The first density threshold is 0.

5.

60. The device according to claim 58 or 59, characterized in that The first information is further used to indicate that the same port of the third CSI-RS resource corresponds to different RBs in two adjacent CSI-RS measurements.

61. The device according to claim 60, characterized in that On the third CSI-RS resource, the RB corresponding to port p in the kth CSI-RS measurement satisfies the following relationship: P(k,p)=(P(0,p)+k)mod N; Among them, p represents the port index, k is the k-th measurement, P(0,p) represents the starting frequency domain index of port p in the initial CSI-RS measurement, P(k,p) is the frequency domain index of port p in the k-th CSI-RS measurement, N represents a parameter determined according to the frequency domain density of the third CSI-RS resource, and k is a positive integer greater than or equal to 1.

62. The device according to claim 60, characterized in that The first information is further used to indicate that RBs corresponding to two adjacent CSI-RS measurements on the same port of the third CSI-RS resource are discontinuous.

63. The device according to claim 62, characterized in that The first information is further used to indicate the number of RBs spaced between RBs occupied by the same port of the third CSI-RS resource in two adjacent CSI-RS measurements.

64. The device according to any one of claims 49 to 63, characterized in that The first information includes one or more of the following items for each CSI-RS resource in the CSI-RS resources occupied by the CSI-RS: the number of ports corresponding to the RB where the CSI-RS resource is located, the CDM type of the CSI-RS in the CSI-RS resource, the starting time domain position corresponding to the RB where the CSI-RS is located in the CSI-RS resource, and the starting frequency domain position of the CDM group corresponding to the RB where the CSI-RS is located in the CSI-RS resource.

65. A communication device, characterized in that: include: Processor and memory; The memory is used to store computer instructions. When the processor executes the instructions, the communication device executes the channel measurement method as described in any one of claims 1-16, or executes the channel measurement method as described in any one of claims 17-32.

66. A communication device, characterized in that: include: processor and interface circuit; wherein, The interface circuit is used to receive code instructions and transmit them to the processor; The processor is used to run the code instructions to execute the channel measurement method according to any one of claims 1-16, or to execute the channel measurement method according to any one of claims 17-32.

67. A communication device, characterized in that: The communication device includes a processor and a transceiver, the transceiver is used to exchange information between the communication device and other communication devices, and the processor executes program instructions to execute the channel measurement method as described in any one of claims 1-16, or executes the channel measurement method as described in any one of claims 17-32.

68. The communication device according to any one of claims 65 to 67, characterized in that: The communication device is a chip.

69. A computer-readable storage medium, characterized in that The computer-readable storage medium includes a computer program or instructions. When the computer program or instructions are executed on a computer, the computer executes the channel measurement method according to any one of claims 1 to 16, or executes the channel measurement method according to any one of claims 17 to 32.

70. A computer program product, characterized in that The computer program product comprises: a computer program or instructions, which, when executed on a computer, enables the computer to execute the channel measurement method according to any one of claims 1 to 16, or to execute the channel measurement method according to any one of claims 17 to 32.

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