Communication method and apparatus, and storage medium and program product

Abstract

A communication method and apparatus, and a storage medium and a program product. The method comprises: a first communication apparatus acquiring first information, wherein the first information is used for indicating information of at least one first frequency-domain resource subset in a first frequency-domain resource set on which a DMRS corresponding to the first communication apparatus is sent or received, or the first information indicates information of at least one second frequency-domain resource subset in the first frequency-domain resource set on which the DMRS corresponding to the first communication apparatus is not sent or received, the first frequency-domain resource set comprises an available DMRS frequency-domain resource set, and the first frequency-domain resource set comprises the at least one first frequency-domain resource subset and the at least one second frequency-domain resource subset; and on the basis of the first information, sending or receiving the DMRS on the at least one first frequency-domain resource subset.

Description

Communication methods, devices, storage media and software products

[0001] This application claims priority to Chinese Patent Application No. 202411990059.X, filed on December 28, 2024, entitled "Communication Method, Apparatus, Storage Medium and Program Product", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communication technology, and in particular to a communication method, apparatus, storage medium, and program product. Background Technology

[0003] Urban air mobility (UAM) utilizes electric vertical take-off and landing (eVTOL) aircraft for urban air transportation, providing services in passenger transport, logistics, and other applications. With the development of this business, on the one hand, the terminal equipment used in UAM (also known as UAM terminals) faces the challenge of coexisting with ground communication terminals, requiring consideration of how to reduce interference between UAM terminals and ground communication terminals. On the other hand, it is necessary to consider the characteristics of the UAM scenario and more effectively configure the demodulation reference signal (DMRS) resources of the UAM terminals. Summary of the Invention

[0004] This application provides a communication method, apparatus, storage medium, and program product to reduce the resource overhead of the DMRS of a first communication device and reduce interference with other communication devices.

[0005] Firstly, a communication method is provided, which can be executed by a first communication device, a circuit or chip applied to the first communication device, or a module applied to the first communication device. The following description uses the first communication device as the executing entity.

[0006] In this method, a first communication device acquires first information, which is used to indicate information in a first frequency domain resource set for transmitting or receiving at least one first frequency domain resource subset of the DMRS corresponding to the first communication device, or the first information indicates information in the first frequency domain resource set for not transmitting or receiving at least one second frequency domain resource subset of the DMRS corresponding to the first communication device, wherein the first frequency domain resource set includes an available DMRS frequency domain resource set, and the first frequency domain resource set includes the at least one first frequency domain resource subset and the at least one second frequency domain resource subset; and based on the first information, transmits or receives the DMRS on the at least one first frequency domain resource subset.

[0007] By using this method, the first communication device obtains information about at least one frequency domain resource subset in the first frequency domain resource set that (does not) transmit or receive the DMRS corresponding to the first communication device, thereby preventing other frequency domain resource subsets in the first frequency domain resource set from transmitting the DMRS corresponding to the first communication device, thereby reducing the DMRS resource overhead of the first communication device and reducing interference with other communication devices.

[0008] Furthermore, at least one subset of the first frequency domain resources can reuse the existing DMRS pattern, enabling it to maintain the same DMRS pattern as the third communication device, thereby reducing the impact on interference estimation for the third communication device.

[0009] Furthermore, the first communication device reduces the resource overhead of DMRS, which is beneficial for the first communication device to make more accurate interference estimation.

[0010] In one possible design, obtaining the first information includes: receiving the first information.

[0011] Using this design, the second communication device can instruct the first communication device to send or receive information about at least one frequency domain resource subset of the DMRS corresponding to the first communication device in the first frequency domain resource set (not) sending or receiving.

[0012] In another possible design, the method further includes: a first communication device receiving second information, the second information indicating whether a request to report supports a first capability, the first capability being the ability to transmit or receive the DMRS in at least one first frequency domain resource subset of the first frequency domain resource set, or the first capability being the ability not to transmit or receive the DMRS in at least one second frequency domain resource subset of the first frequency domain resource set; and sending third information, the third information indicating support for the first capability.

[0013] Using this design, the second communication device can request to obtain the first capability of the first communication device, thereby the second communication device can confirm that the first communication device supports transmitting or receiving DMRS in at least one first frequency domain resource subset in the first frequency domain resource set, or confirm that the first communication device supports not transmitting or receiving DMRS in at least one second frequency domain resource subset in the first frequency domain resource set.

[0014] In another possible design, the method further includes: a first communication device sending fourth information, the fourth information indicating support for a first capability, the first capability being the ability to transmit or receive the DMRS in at least one first frequency domain resource subset of the first frequency domain resource set, or the first capability being the ability not to transmit or receive the DMRS in at least one second frequency domain resource subset of the first frequency domain resource set.

[0015] In this design, the first communication device can proactively report support for the first capability, thereby enabling the second communication device to confirm that the first communication device supports transmitting or receiving DMRS in at least one first frequency domain resource subset in the first frequency domain resource set, or to confirm that the first communication device supports not transmitting or receiving DMRS in at least one second frequency domain resource subset in the first frequency domain resource set.

[0016] In another possible design, the at least one first frequency domain resource subset or the at least one second frequency domain resource subset is predefined.

[0017] In another possible design, the first information includes at least one of the following: indication information of the at least one first frequency domain resource subset; or indication information of the at least one second frequency domain resource subset; or indication information of the initial frequency domain resource subset in the first frequency domain resource set, and indication information of a first number of frequency domain resource subsets spaced between each first frequency domain resource subset in the at least one first frequency domain resource subset and the initial frequency domain resource subset; or indication information of the initial frequency domain resource subset in the first frequency domain resource set, and indication information of a first number of frequency domain resource subsets spaced between each first frequency domain resource subset in the at least one second frequency domain resource subset. Indication information of a second number of frequency domain resource subsets between the second frequency domain resource subset and the initial frequency domain resource subset; or indication information of the initial first frequency domain resource subset in the first frequency domain resource set, and whether each frequency domain resource subset in the first frequency domain resource set, starting from the initial first frequency domain resource subset, transmits or receives DMRS; or indication information of the initial second frequency domain resource subset in the first frequency domain resource set, and whether each frequency domain resource subset in the first frequency domain resource set, starting from the initial second frequency domain resource subset, does not transmit or receive DMRS.

[0018] In another possible design, the indication information is a bitmap used to indicate whether each frequency domain resource subset in the first frequency domain resource set transmits or receives the DMRS.

[0019] In another possible design, the first information is also used to indicate the power scaling factor corresponding to the DMRS, the power scaling factor being associated with the number of frequency domain resource subsets in the first frequency domain resource set and the number of frequency domain resource subsets in the at least one first frequency domain resource subset.

[0020] Secondly, a communication method is provided, which can be executed by a second communication device, a circuit or chip applied to the second communication device, or a module applied to the second communication device. The following description uses the second communication device as the executing entity.

[0021] In this method, a second communication device sends first information, which is used to indicate information in a first frequency domain resource set for transmitting or receiving at least one first frequency domain resource subset of the DMRS corresponding to the first communication device, or the first information indicates information in the first frequency domain resource set for not transmitting or receiving at least one second frequency domain resource subset of the DMRS corresponding to the first communication device, wherein the first frequency domain resource set includes an available DMRS frequency domain resource set, and the first frequency domain resource set includes the at least one first frequency domain resource subset and the at least one second frequency domain resource subset; and based on the first information, the DMRS is transmitted or received on the at least one first frequency domain resource subset.

[0022] In one possible design, the method further includes: a second communication device sending second information, the second information indicating whether a request to report supports a first capability, the first capability being the ability to transmit or receive the DMRS in at least one first frequency domain resource subset in the first frequency domain resource set, or the first capability being the ability not to transmit or receive the DMRS in at least one second frequency domain resource subset in the first frequency domain resource set; and receiving third information, the third information indicating support for the first capability.

[0023] In another possible design, the method further includes: a second communication device receiving fourth information, the fourth information indicating support for a first capability, the first capability being the ability to transmit or receive the DMRS in at least one first frequency domain resource subset of the first frequency domain resource set, or the first capability being the ability not to transmit or receive the DMRS in at least one second frequency domain resource subset of the first frequency domain resource set.

[0024] In another possible design, the at least one first frequency domain resource subset or the at least one second frequency domain resource subset is predefined.

[0025] In another possible design, the first information includes at least one of the following: indication information of the at least one first frequency domain resource subset; or indication information of the at least one second frequency domain resource subset; or indication information of the initial frequency domain resource subset in the first frequency domain resource set, and indication information of a first number of frequency domain resource subsets spaced between each first frequency domain resource subset in the at least one first frequency domain resource subset and the initial frequency domain resource subset; or indication information of the initial frequency domain resource subset in the first frequency domain resource set, and indication information of a first number of frequency domain resource subsets spaced between each first frequency domain resource subset in the at least one second frequency domain resource subset. Indication information of a second number of frequency domain resource subsets between the second frequency domain resource subset and the initial frequency domain resource subset; or indication information of the initial first frequency domain resource subset in the first frequency domain resource set, and whether each frequency domain resource subset in the first frequency domain resource set, starting from the initial first frequency domain resource subset, transmits or receives DMRS; or indication information of the initial second frequency domain resource subset in the first frequency domain resource set, and whether each frequency domain resource subset in the first frequency domain resource set, starting from the initial second frequency domain resource subset, does not transmit or receive DMRS.

[0026] In another possible design, the indication information is a bitmap used to indicate whether each frequency domain resource subset in the first frequency domain resource set transmits or receives the DMRS.

[0027] In another possible design, the first information is also used to indicate the power scaling factor corresponding to the DMRS, the power scaling factor being associated with the number of frequency domain resource subsets in the first frequency domain resource set and the number of frequency domain resource subsets in the at least one first frequency domain resource subset.

[0028] Thirdly, a communication method is provided, which can be executed by a first communication device, a circuit or chip applied to the first communication device, or a module applied to the first communication device. The following description uses the first communication device as the executing entity.

[0029] In this method, a first communication device acquires first information, which is used to indicate information in a first frequency domain resource set for transmitting or receiving at least one first frequency domain resource subset of the DMRS corresponding to the first communication device, or the first information indicates information in the first frequency domain resource set for not transmitting or receiving at least one second frequency domain resource subset of the DMRS corresponding to the first communication device, wherein the first frequency domain resource set includes an available DMRS frequency domain resource set, and the first frequency domain resource set includes the at least one first frequency domain resource subset and the at least one second frequency domain resource subset, wherein the at least one first frequency domain resource subset corresponds to at least four code division multiplexing groups; and based on the first information, the DMRS is transmitted or received on the at least one first frequency domain resource subset.

[0030] Using this method, the first communication device obtains information about at least one frequency domain resource subset of the first frequency domain resource set that (does not) transmit or receive the DMRS corresponding to the first communication device, so that other frequency domain resource subsets in the first frequency domain resource set do not transmit the DMRS corresponding to the first communication device. The DMRS corresponding to the first communication device can adopt a frequency domain sparse pattern, thereby reducing the DMRS resource overhead of the first communication device and reducing interference with other communication devices.

[0031] Furthermore, the first communication device reduces the resource overhead of DMRS, which is beneficial for the first communication device to make more accurate interference estimation.

[0032] In one possible design, obtaining the first information includes: receiving the first information.

[0033] Using this design, the second communication device can instruct the first communication device to send or receive information about at least one frequency domain resource subset of the DMRS corresponding to the first communication device in the first frequency domain resource set (not) sending or receiving.

[0034] In another possible design, the method further includes: a first communication device receiving second information, the second information indicating whether a request to report supports a first capability, the first capability being the ability to transmit or receive the DMRS in at least one first frequency domain resource subset in the first frequency domain resource set, or the first capability being the ability not to transmit or receive the DMRS in at least one second frequency domain resource subset in the first frequency domain resource set; and sending third information, the third information indicating support for the first capability.

[0035] In another possible design, the method further includes: a first communication device sending fourth information, the fourth information indicating support for a first capability, the first capability being the ability to transmit or receive the DMRS in at least one first frequency domain resource subset of the first frequency domain resource set, or the first capability being the ability not to transmit or receive the DMRS in at least one second frequency domain resource subset of the first frequency domain resource set.

[0036] In another possible design, the at least one first frequency domain resource subset or the at least one second frequency domain resource subset is predefined.

[0037] In another possible design, the first information includes at least one of the following: indication information of the at least one first frequency domain resource subset; or indication information of the at least one second frequency domain resource subset; or indication information of the initial frequency domain resource subset in the first frequency domain resource set, and indication information of a first number of frequency domain resource subsets spaced between each first frequency domain resource subset in the at least one first frequency domain resource subset and the initial frequency domain resource subset; or indication information of the initial frequency domain resource subset in the first frequency domain resource set, and indication information of a first number of frequency domain resource subsets spaced between each first frequency domain resource subset in the at least one second frequency domain resource subset. Indication information of a second number of frequency domain resource subsets between the second frequency domain resource subset and the initial frequency domain resource subset; or indication information of the initial first frequency domain resource subset in the first frequency domain resource set, and whether each frequency domain resource subset in the first frequency domain resource set, starting from the initial first frequency domain resource subset, transmits or receives DMRS; or indication information of the initial second frequency domain resource subset in the first frequency domain resource set, and whether each frequency domain resource subset in the first frequency domain resource set, starting from the initial second frequency domain resource subset, does not transmit or receive DMRS.

[0038] In another possible design, the indication information is a bitmap used to indicate whether each frequency domain resource subset in the first frequency domain resource set transmits or receives the DMRS.

[0039] In another possible design, the first information is also used to indicate the power scaling factor corresponding to the DMRS, the power scaling factor being associated with the number of frequency domain resource subsets in the first frequency domain resource set and the number of frequency domain resource subsets in the at least one first frequency domain resource subset.

[0040] Fourthly, a communication method is provided, which can be executed by a second communication device, a circuit or chip applied to the second communication device, or a module applied to the second communication device. The following description uses the second communication device as the executing entity.

[0041] In this method, a second communication device sends first information, which is used to indicate information in a first frequency domain resource set for transmitting or receiving at least one first frequency domain resource subset of the DMRS corresponding to the first communication device, or the first information indicates information in the first frequency domain resource set for not transmitting or receiving at least one second frequency domain resource subset of the DMRS corresponding to the first communication device, wherein the first frequency domain resource set includes an available DMRS frequency domain resource set, the first frequency domain resource set includes the at least one first frequency domain resource subset and the at least one second frequency domain resource subset, and the at least one first frequency domain resource subset corresponds to at least four code division multiplexing groups; and based on the first information, the DMRS is transmitted or received on the at least one first frequency domain resource subset.

[0042] In one possible design, the method further includes: a second communication device sending second information, the second information indicating whether a request to report supports a first capability, the first capability being the ability to transmit or receive the DMRS in at least one first frequency domain resource subset in the first frequency domain resource set, or the first capability being the ability not to transmit or receive the DMRS in at least one second frequency domain resource subset in the first frequency domain resource set; and receiving third information, the third information indicating support for the first capability.

[0043] In another possible design, the method further includes: a second communication device receiving fourth information, the fourth information indicating support for a first capability, the first capability being the ability to transmit or receive the DMRS in at least one first frequency domain resource subset of the first frequency domain resource set, or the first capability being the ability not to transmit or receive the DMRS in at least one second frequency domain resource subset of the first frequency domain resource set.

[0044] In another possible design, the at least one first frequency domain resource subset or the at least one second frequency domain resource subset is predefined.

[0045] In another possible design, the first information includes at least one of the following: indication information of the at least one first frequency domain resource subset; or indication information of the at least one second frequency domain resource subset; or indication information of the initial frequency domain resource subset in the first frequency domain resource set, and indication information of a first number of frequency domain resource subsets spaced between each first frequency domain resource subset in the at least one first frequency domain resource subset and the initial frequency domain resource subset; or indication information of the initial frequency domain resource subset in the first frequency domain resource set, and indication information of a first number of frequency domain resource subsets spaced between each first frequency domain resource subset in the at least one second frequency domain resource subset. Indication information of a second number of frequency domain resource subsets between the second frequency domain resource subset and the initial frequency domain resource subset; or indication information of the initial first frequency domain resource subset in the first frequency domain resource set, and whether each frequency domain resource subset in the first frequency domain resource set, starting from the initial first frequency domain resource subset, transmits or receives DMRS; or indication information of the initial second frequency domain resource subset in the first frequency domain resource set, and whether each frequency domain resource subset in the first frequency domain resource set, starting from the initial second frequency domain resource subset, does not transmit or receive DMRS.

[0046] In another possible design, the indication information is a bitmap used to indicate whether each frequency domain resource subset in the first frequency domain resource set transmits or receives the DMRS.

[0047] In another possible design, the first information is also used to indicate the power scaling factor corresponding to the DMRS, the power scaling factor being associated with the number of frequency domain resource subsets in the first frequency domain resource set and the number of frequency domain resource subsets in the at least one first frequency domain resource subset.

[0048] Fifthly, a communication device is provided. The communication device can perform the methods described in the first to fourth aspects or any one of the designs described in the first to fourth aspects. The communication device can be a first communication device or a second communication device, or it can be a module (e.g., a chip) applied in a first communication device or a module (e.g., a chip) applied in a second communication device.

[0049] In one possible design, the communication device includes a transceiver unit and a processing unit. The transceiver unit performs the receiving and / or transmitting operations in the methods of the first to fourth aspects or any one of the designs described above; the processing unit performs the processing operations in the methods of the first to fourth aspects or any one of the designs described above.

[0050] Wherein, when the first communication device is used to execute the method in the first aspect or any of the designs in the first aspect, the processing unit is used to acquire first information, the first information being used to indicate information in the first frequency domain resource set for transmitting or receiving at least one first frequency domain resource subset of the DMRS corresponding to the first communication device, or the first information indicating information in the first frequency domain resource set for not transmitting or receiving at least one second frequency domain resource subset of the DMRS corresponding to the first communication device, the first frequency domain resource set including an available DMRS frequency domain resource set, the first frequency domain resource set including the at least one first frequency domain resource subset and the at least one second frequency domain resource subset; the processing unit is further used to generate the DMRS; and the transceiver unit is further used to transmit or receive the DMRS on the at least one first frequency domain resource subset based on the first information.

[0051] Optionally, the transceiver unit is used to receive the first information.

[0052] Optionally, the transceiver unit is further configured to receive second information, the second information being used to indicate whether the request report supports a first capability, the first capability being the ability to transmit or receive the DMRS in at least one first frequency domain resource subset in the first frequency domain resource set, or the first capability being the ability not to transmit or receive the DMRS in at least one second frequency domain resource subset in the first frequency domain resource set; the processing unit is further configured to generate and transmit third information, the third information being used to indicate support for the first capability; and the transceiver unit is further configured to transmit the third information.

[0053] Optionally, the processing unit is further configured to generate fourth information, the fourth information being used to indicate support for a first capability, the first capability being the ability to transmit or receive the DMRS in at least one first frequency domain resource subset in the first frequency domain resource set, or the first capability being the ability not to transmit or receive the DMRS in at least one second frequency domain resource subset in the first frequency domain resource set; the transceiver unit is further configured to transmit the fourth information.

[0054] Optionally, the at least one first frequency domain resource subset or the at least one second frequency domain resource subset is predefined.

[0055] Optionally, the first information includes at least one of the following: indication information of the at least one first frequency domain resource subset; or indication information of the at least one second frequency domain resource subset; or indication information of the starting frequency domain resource subset in the first frequency domain resource set, and indication information of a first number of frequency domain resource subsets spaced between each first frequency domain resource subset in the at least one first frequency domain resource subset and the starting frequency domain resource subset; or indication information of the starting frequency domain resource subset in the first frequency domain resource set, and indication information of a second number of frequency domain resource subsets spaced between each second frequency domain resource subset in the at least one second frequency domain resource subset and the starting frequency domain resource subset; or indication information of the starting first frequency domain resource subset in the first frequency domain resource set, and whether each frequency domain resource subset in the first frequency domain resource set, starting from the starting first frequency domain resource subset, transmits or receives DMRS; or indication information of the starting second frequency domain resource subset in the first frequency domain resource set, and whether each frequency domain resource subset in the first frequency domain resource set, starting from the starting second frequency domain resource subset, does not transmit or receive DMRS.

[0056] Optionally, the indication information is a bitmap, which is used to indicate whether each frequency domain resource subset in the first frequency domain resource set sends or receives the DMRS.

[0057] Optionally, the first information is further used to indicate the power scaling factor corresponding to the DMRS, the power scaling factor being associated with the number of frequency domain resource subsets in the first frequency domain resource set and the number of frequency domain resource subsets in the at least one first frequency domain resource subset.

[0058] Wherein, when the first communication device is used to execute the method in the second aspect or any of the designs in the second aspect, the processing unit is used to generate first information, the first information being used to indicate information in the first frequency domain resource set for transmitting or receiving at least one first frequency domain resource subset of the DMRS corresponding to the first communication device, or the first information indicating information in the first frequency domain resource set for not transmitting or receiving at least one second frequency domain resource subset of the DMRS corresponding to the first communication device, the first frequency domain resource set including an available DMRS frequency domain resource set, the first frequency domain resource set including the at least one first frequency domain resource subset and the at least one second frequency domain resource subset; the transceiver unit is used to transmit the first information; and the transceiver unit is further used to transmit or receive the DMRS on the at least one first frequency domain resource subset based on the first information.

[0059] Optionally, the processing unit is further configured to generate second information, the second information being used to indicate whether the request report supports a first capability, the first capability being the ability to transmit or receive the DMRS in at least one first frequency domain resource subset in the first frequency domain resource set, or the first capability being the ability not to transmit or receive the DMRS in at least one second frequency domain resource subset in the first frequency domain resource set; the transceiver unit is further configured to transmit the second information; and the transceiver unit is further configured to receive third information, the third information being used to indicate support for the first capability.

[0060] Optionally, the transceiver unit is further configured to receive fourth information, the fourth information being used to indicate support for a first capability, the first capability being the ability to transmit or receive the DMRS in at least one first frequency domain resource subset in the first frequency domain resource set, or the first capability being the ability not to transmit or receive the DMRS in at least one second frequency domain resource subset in the first frequency domain resource set.

[0061] Optionally, the at least one first frequency domain resource subset or the at least one second frequency domain resource subset is predefined.

[0062] Optionally, the first information includes at least one of the following: indication information of the at least one first frequency domain resource subset; or indication information of the at least one second frequency domain resource subset; indication information of the starting frequency domain resource subset in the first frequency domain resource set, and indication information of a first number of frequency domain resource subsets spaced between each first frequency domain resource subset in the at least one first frequency domain resource subset and the starting frequency domain resource subset; or indication information of the starting frequency domain resource subset in the first frequency domain resource set, and indication information of a second number of frequency domain resource subsets spaced between each second frequency domain resource subset in the at least one second frequency domain resource subset and the starting frequency domain resource subset; or indication information of the starting first frequency domain resource subset in the first frequency domain resource set, and whether each frequency domain resource subset in the first frequency domain resource set, starting from the starting first frequency domain resource subset, transmits or receives DMRS; or indication information of the starting second frequency domain resource subset in the first frequency domain resource set, and whether each frequency domain resource subset in the first frequency domain resource set, starting from the starting second frequency domain resource subset, does not transmit or receive DMRS.

[0063] Optionally, the indication information is a bitmap, which is used to indicate whether each frequency domain resource subset in the first frequency domain resource set sends or receives the DMRS.

[0064] Optionally, the first information is further used to indicate the power scaling factor corresponding to the DMRS, the power scaling factor being associated with the number of frequency domain resource subsets in the first frequency domain resource set and the number of frequency domain resource subsets in the at least one first frequency domain resource subset.

[0065] Wherein, when the first communication device is used to execute the method in the third aspect or any of the designs in the third aspect, the processing unit is used to acquire first information, the first information being used to indicate information in the first frequency domain resource set for transmitting or receiving at least one first frequency domain resource subset of the DMRS corresponding to the first communication device, or the first information indicating information in the first frequency domain resource set for not transmitting or receiving at least one second frequency domain resource subset of the DMRS corresponding to the first communication device, the first frequency domain resource set including an available DMRS frequency domain resource set, the first frequency domain resource set including the at least one first frequency domain resource subset and the at least one second frequency domain resource subset, the at least one first frequency domain resource subset corresponding to at least four code division multiplexing groups; the processing unit is further used to generate the DMRS; and the transceiver unit is further used to transmit or receive the DMRS on the at least one first frequency domain resource subset based on the first information.

[0066] Optionally, the transceiver unit is used to receive the first information.

[0067] Optionally, the transceiver unit is further configured to receive second information, the second information being used to indicate whether the request report supports a first capability, the first capability being the ability to transmit or receive the DMRS in at least one first frequency domain resource subset in the first frequency domain resource set, or the first capability being the ability not to transmit or receive the DMRS in at least one second frequency domain resource subset in the first frequency domain resource set; the processing unit is further configured to generate and transmit third information, the third information being used to indicate support for the first capability; and the transceiver unit is further configured to transmit the third information.

[0068] Optionally, the processing unit is further configured to generate fourth information, the fourth information being used to indicate support for a first capability, the first capability being the ability to transmit or receive the DMRS in at least one first frequency domain resource subset in the first frequency domain resource set, or the first capability being the ability not to transmit or receive the DMRS in at least one second frequency domain resource subset in the first frequency domain resource set; the transceiver unit is further configured to transmit the fourth information.

[0069] Optionally, the at least one first frequency domain resource subset or the at least one second frequency domain resource subset is predefined.

[0070] Optionally, the first information includes at least one of the following: indication information of the at least one first frequency domain resource subset; or indication information of the at least one second frequency domain resource subset; or indication information of the starting frequency domain resource subset in the first frequency domain resource set, and indication information of a first number of frequency domain resource subsets spaced between each first frequency domain resource subset in the at least one first frequency domain resource subset and the starting frequency domain resource subset; or indication information of the starting frequency domain resource subset in the first frequency domain resource set, and indication information of a second number of frequency domain resource subsets spaced between each second frequency domain resource subset in the at least one second frequency domain resource subset and the starting frequency domain resource subset; or indication information of the starting first frequency domain resource subset in the first frequency domain resource set, and whether each frequency domain resource subset in the first frequency domain resource set, starting from the starting first frequency domain resource subset, transmits or receives DMRS; or indication information of the starting second frequency domain resource subset in the first frequency domain resource set, and whether each frequency domain resource subset in the first frequency domain resource set, starting from the starting second frequency domain resource subset, does not transmit or receive DMRS.

[0071] Optionally, the indication information is a bitmap, which is used to indicate whether each frequency domain resource subset in the first frequency domain resource set sends or receives the DMRS.

[0072] Optionally, the first information is further used to indicate the power scaling factor corresponding to the DMRS, the power scaling factor being associated with the number of frequency domain resource subsets in the first frequency domain resource set and the number of frequency domain resource subsets in the at least one first frequency domain resource subset.

[0073] Wherein, when the first communication device is used to execute the method in the fourth aspect or any of the designs in the fourth aspect, the processing unit is used to generate first information, the first information being used to indicate information in the first frequency domain resource set for transmitting or receiving at least one first frequency domain resource subset of the DMRS corresponding to the first communication device, or the first information indicating information in the first frequency domain resource set for not transmitting or receiving at least one second frequency domain resource subset of the DMRS corresponding to the first communication device, the first frequency domain resource set including an available DMRS frequency domain resource set, the first frequency domain resource set including the at least one first frequency domain resource subset and the at least one second frequency domain resource subset, the at least one first frequency domain resource subset corresponding to at least four code division multiplexing groups; the transceiver unit is used to transmit the first information; and the transceiver unit is further used to transmit or receive the DMRS on the at least one first frequency domain resource subset based on the first information.

[0074] Optionally, the processing unit is further configured to generate second information, the second information being used to indicate whether the request report supports a first capability, the first capability being the ability to transmit or receive the DMRS in at least one first frequency domain resource subset in the first frequency domain resource set, or the first capability being the ability not to transmit or receive the DMRS in at least one second frequency domain resource subset in the first frequency domain resource set; the transceiver unit is further configured to transmit the second information; and the transceiver unit is further configured to receive third information, the third information being used to indicate support for the first capability.

[0075] Optionally, the transceiver unit is further configured to receive fourth information, the fourth information being used to indicate support for a first capability, the first capability being the ability to transmit or receive the DMRS in at least one first frequency domain resource subset in the first frequency domain resource set, or the first capability being the ability not to transmit or receive the DMRS in at least one second frequency domain resource subset in the first frequency domain resource set.

[0076] Optionally, the at least one first frequency domain resource subset or the at least one second frequency domain resource subset is predefined.

[0077] Optionally, the first information includes at least one of the following: indication information of the at least one first frequency domain resource subset; or indication information of the at least one second frequency domain resource subset; indication information of the starting frequency domain resource subset in the first frequency domain resource set, and indication information of a first number of frequency domain resource subsets spaced between each first frequency domain resource subset in the at least one first frequency domain resource subset and the starting frequency domain resource subset; or indication information of the starting frequency domain resource subset in the first frequency domain resource set, and indication information of a second number of frequency domain resource subsets spaced between each second frequency domain resource subset in the at least one second frequency domain resource subset and the starting frequency domain resource subset; or indication information of the starting first frequency domain resource subset in the first frequency domain resource set, and whether each frequency domain resource subset in the first frequency domain resource set, starting from the starting first frequency domain resource subset, transmits or receives DMRS; or indication information of the starting second frequency domain resource subset in the first frequency domain resource set, and whether each frequency domain resource subset in the first frequency domain resource set, starting from the starting second frequency domain resource subset, does not transmit or receive DMRS.

[0078] Optionally, the indication information is a bitmap, which is used to indicate whether each frequency domain resource subset in the first frequency domain resource set sends or receives the DMRS.

[0079] Optionally, the first information is further used to indicate the power scaling factor corresponding to the DMRS, the power scaling factor being associated with the number of frequency domain resource subsets in the first frequency domain resource set and the number of frequency domain resource subsets in the at least one first frequency domain resource subset.

[0080] In another possible design, the communication device includes a processor coupled to a memory; the processor is configured to support the device in performing the corresponding functions in the channel state information reporting method described above. The memory, coupled to the processor, stores the necessary computer programs (or computer-executable instructions) and / or data of the device. Optionally, the communication device may further include a communication interface for supporting communication between the device and other network elements, such as the transmission or reception of data and / or signals. Exemplarily, the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface. Optionally, the memory may be located internally within the communication device and integrated with the processor; alternatively, it may be located externally to the communication device.

[0081] In another possible design, the communication device includes a processor and a transceiver, the processor being coupled to the transceiver. The processor executes computer programs or instructions to control the transceiver to receive and send information. When the processor executes the computer programs or instructions, it is also used to design the above-mentioned method through logic circuits or execution code instructions. The transceiver can be a transceiver circuit, a transceiver module, or an input / output interface, used to receive signals from other communication devices besides the communication device and transmit them to the processor, or to send signals from the processor to other communication devices besides the communication device. When the communication device is a chip, the transceiver is a transceiver circuit or an input / output interface.

[0082] When the aforementioned communication device is a chip, the transmitting unit can be an output unit, such as an output circuit or a communication interface; the receiving unit can be an input unit, such as an input circuit or a communication interface. When the communication device is a first communication device, the transmitting unit can be a transmitter or a receiver; the receiving unit can be a receiver or a receiver.

[0083] A sixth aspect provides a computer-readable storage medium having a computer program or instructions stored thereon, which, when executed by a communication device, implement the method as described in the first aspect or any design of the first aspect, or implement the method as described in the second aspect or any design of the second aspect, or implement the method as described in the third aspect or any design of the third aspect, or implement the method as described in the fourth aspect or any design of the fourth aspect.

[0084] In a seventh aspect, a computer program product is provided that, when executed on a communication device, implements the method as described in the first aspect or any design of the first aspect, or implements the method as described in the second aspect or any design of the second aspect, or implements the method as described in the third aspect or any design of the third aspect, or implements the method as described in the fourth aspect or any design of the fourth aspect. Attached Figure Description

[0085] Figure 1 is a schematic diagram of the architecture of the communication system 1000 used in the embodiments of this application;

[0086] Figure 2a shows the time-frequency resource configuration diagram of DMRS for single-symbol and double-symbol DMRSType1.

[0087] Figure 2b shows the time-frequency resource configuration diagram of DMRS for single-symbol and double-symbol DMRS Type 2.

[0088] Figure 3 shows the time-frequency resource configuration diagram of DMRS based on DMRS Type 2, which supports 6 CDM groups;

[0089] Figure 4 is a flowchart illustrating a communication method provided in an embodiment of this application;

[0090] Figures 5 and 6 are time-frequency resource configuration diagrams of DMRS in an example of an embodiment of this application;

[0091] Figures 7 and 8 are schematic diagrams of the communication device provided in the embodiments of this application. Detailed Implementation

[0092] Figure 1 is a schematic diagram of the architecture of a communication system 1000 provided in an embodiment of this application. As shown in Figure 1, the communication system 1000 includes a radio access network (RAN) 100, wherein the RAN 100 includes at least one RAN node (110a and 110b in Figure 1, collectively referred to as 110), and may also include at least one terminal device (120a-120j in Figure 1, collectively referred to as 120). The RAN 100 may also include other RAN nodes, such as wireless relay devices and / or wireless backhaul devices (not shown in Figure 1). The terminal device 120 is wirelessly connected to the RAN node 110. Terminal devices and RAN nodes can be interconnected via wired or wireless means. The communication system 1000 may also include a core network 200. The RAN node 110 is connected to the core network 200 via wireless or wired means. The core network equipment in core network 200 and the RAN node 110 in RAN 100 can be independent and different physical devices, or they can be the same physical device that integrates the logical functions of the core network equipment and the logical functions of the RAN node. Communication system 1000 may also include Internet 300.

[0093] RAN100 can be an evolved universal terrestrial radio access (E-UTRA) system, a new radio (NR) system, or a future radio access system as defined in the 3rd generation partnership project (3GPP), or it can be a WiFi system. RAN100 can also include two or more of the above-mentioned different radio access systems. RAN100 can also be an open RAN (O-RAN).

[0094] RAN nodes, also known as radio access network devices, RAN entities, or access nodes, are used to help terminal devices access communication systems wirelessly. In one application scenario, an RAN node can be a base station, an evolved NodeB (eNodeB), a transmission and reception point (TRP), a next-generation NodeB (gNB) in a 5G mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system. RAN nodes can be macro base stations (as shown in Figure 1, 110a), micro base stations or indoor stations (as shown in Figure 1, 110b), relay nodes, or donor nodes.

[0095] In another application scenario, multiple RAN nodes can collaborate to help terminal devices achieve wireless access, with different RAN nodes implementing different functions of the base station. For example, a RAN node can be a central unit (CU), a distributed unit (DU), or a radio unit (RU). Here, the CU performs the functions of the base station's Radio Resource Control (RRC) and Packet Data Convergence Protocol (PDCP), and can also perform the functions of the Service Data Adaptation Protocol (SDAP). The DU performs the functions of the base station's Radio Link Control (RANC) and Medium Access Control (MAC) layers, and can also perform some or all of the physical layer functions. For specific descriptions of these protocol layers, refer to the relevant 3GPP technical specifications. The RU can be used to implement radio frequency signal transmission and reception. The CU and DU can be two independent RAN nodes or integrated into the same RAN node, such as within a baseband unit (BBU). The RU can be included in radio frequency equipment, such as in a remote radio unit (RRU) or an active antenna unit (AAU). The CU can be further divided into two types of RAN nodes: CU-control plane and CU-user plane.

[0096] In different systems, RAN nodes may have different names. For example, in an O-RAN system, a CU can be called an open CU (O-CU), a DU can be called an open DU (O-DU), and an RU can be called an open RU (O-RU). The RAN nodes in the embodiments of this application can be implemented through software modules, hardware modules, or a combination of software and hardware modules. For example, a RAN node can be a server loaded with the corresponding software modules. The embodiments of this application do not limit the specific technology or device form used in the RAN nodes. For ease of description, a base station is used as an example of a RAN node in the following description.

[0097] A terminal device is a device with wireless transceiver capabilities, capable of sending signals to or receiving signals from a base station. Terminal devices can also be referred to as terminals, user equipment (UE), mobile stations, mobile terminal devices, etc. Terminal devices can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), the Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, smart transportation, smart cities, etc. Terminal devices can be mobile phones, tablets, computers with wireless transceiver capabilities, wearable devices, vehicles, airplanes, ships, robots, robotic arms, smart home devices, etc. The embodiments of this application do not limit the specific technologies or device forms used in the terminal devices.

[0098] Base stations and terminal equipment can be fixed or mobile. They can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can be deployed on aircraft, balloons, and satellites. The embodiments of this application do not limit the application scenarios of the base stations and terminal equipment.

[0099] The roles of base stations and terminal devices can be relative. For example, the helicopter or drone 120i in Figure 1 can be configured as a mobile base station. For terminal devices 120j that access the wireless access network 100 through 120i, terminal device 120i is a base station; however, for base station 110a, 120i is a terminal device, meaning that 110a and 120i communicate via a wireless air interface protocol. Of course, 110a and 120i can also communicate via a base station-to-base station interface protocol. In this case, relative to 110a, 120i is also a base station. Therefore, both base stations and terminal devices can be collectively referred to as communication devices. 110a and 110b in Figure 1 can be called communication devices with base station functions, and 120a-120j in Figure 1 can be called communication devices with terminal device functions.

[0100] Communication between base stations and terminal devices, between base stations, and between terminal devices can be conducted using licensed spectrum, unlicensed spectrum, or both simultaneously. Communication can be conducted using spectrum below 6 GHz, spectrum above 6 GHz, or both simultaneously. The embodiments of this application do not limit the spectrum resources used for wireless communication.

[0101] In the embodiments of this application, the functions of the base station can be executed by modules (such as chips) within the base station, or by a control subsystem that includes base station functions. This control subsystem, including base station functions, can be a control center in the aforementioned application scenarios such as smart grids, industrial control, intelligent transportation, and smart cities. Similarly, the functions of the terminal device can be executed by modules (such as chips or modems) within the terminal device, or by a device that includes terminal device functions.

[0102] In this application, the base station sends downlink signals or downlink information to the terminal device, and the downlink signals or downlink information are carried on the downlink channel; the terminal device sends uplink signals or uplink information to the base station, and the uplink signals or uplink information are carried on the uplink channel. In order to communicate with the base station, the terminal device needs to establish a radio connection on a cell controlled by the base station. The cell with which the terminal device has established a radio connection is called the serving cell of the terminal device. When the terminal device communicates with the serving cell, it is also subject to interference from signals from neighboring cells.

[0103] DMRS is used for channel estimation and signal demodulation related to the physical downlink shared channel (PDSCH) or physical uplink shared channel (PUSCH).

[0104] When the high-layer signaling configuration parameter – demodulation reference signal-type (dmrs-TypeEnh) configuration is disabled, the 3GPP Release 15 (R15) protocol defines two DMRS types based on different DMRS ports: Configuration Type 1 (Type 1) and Configuration Type 2 (Type 2). DMRS Type 1 supports 4 orthogonal DMRS ports with a single orthogonal frequency division multiplexing (OFDM) symbol (hereinafter referred to as a symbol; for simplicity, the word "orthogonal" can be omitted hereafter, meaning this application considers orthogonal DMRS ports), and 8 DMRS ports with two symbols. DMRS Type 2 supports 6 DMRS ports with a single symbol and 12 DMRS ports with two symbols. In the frequency domain, different DMRS ports are divided into different code division multiplexing groups (CDMgroups). DMRS ports within the same CDMgroup are extended in the time and frequency domain using orthogonal cover codes (OCC). Therefore, as shown in Figures 2a and 2b, the time-frequency resource configuration diagrams of the DMRS defined in R15 provided in this application embodiment are shown. Figure 2a shows the time-frequency resource configuration diagrams of DMRS for single-symbol and double-symbol DMRS Type 1. For the R15 DMRS configuration, each CDM group supports 2 DMRS ports in single-symbol DMRS Type 1 and 4 DMRS ports in double-symbol DMRS Type 2. Figure 2b shows the time-frequency resource configuration diagrams of DMRS for single-symbol and double-symbol DMRS Type 2. Each CDM group supports 2 ports in single-symbol DMRS Type 2 and 4 ports in double-symbol DMRS Type 2. Different resource elements (REs) represent different code division multiplexing CDM groups, and 0-11 represent the DMRS port indices. The horizontal axis represents the time domain, which is the symbol index; the vertical axis represents the frequency domain, which is the RE index. Taking DMRS Type 2 double-symbol DMRS as an example, any CDM group supports a maximum of 4 DMRS ports, meaning that 4 DMRS ports can be used simultaneously.

[0105] Taking PDSCH DMRS as an example, both DMRS Type 1 and DMRS Type 2 are supported at this time. Defined on port p j With subcarrier spacing μ configured, the DMRS value on time-frequency resource (k,l) (i.e., the DMRS value on a certain RE) is: k′=0,1 n = 0, 1, ..., j = 0, 1, ..., υ-1

[0106] Where k represents a subcarrier, and l represents an OFDM symbol. l represents the starting DMRS symbol index, l′ represents the DMRS symbol relative index, and v represents the number of ports allocated. represents the PDSCH DMRS power scaling factor, k′ represents the index offset of different REs sharing the same OCC, and r(2n+k′) represents the (2n+k′)th element of the pseudo-random sequence r. f and w t These represent the frequency domain OCC and time domain OCC, respectively. Their values ​​are determined by consulting Table 1 or Table 2 below, based on the DMRS configuration type (configured by the access network device via RRC signaling). Then, based on the antenna port index p (where the antenna port index is 1000 + DMRS port index) indicated by the downlink control information (DCI) sent by the access network device, the possible w is determined by looking up the table. f and w t Then determine w based on k′ and l′. f (k′) and wt(l′). Additionally, the values ​​of CDM groupλ in Tables 1 and 2 represent the index of the DMRS CDM group, and Δ represents the frequency domain offset factor.

[0107] Table 1 PDSCH DMRS Type 1 OCC Mapping Table

[0108] Table 2 PDSCH DMRS Type 2 OCC Mapping Table

[0109] 3GPP Release 18 (R18) expanded the DMRS port capacity (by increasing the length and / or number of OCCs, thus increasing the number of DMRS ports). With the higher-layer signaling configuration parameter dmrs-TypeEnh enabled, the number of DMRS ports supported in each CDM group doubles compared to R15 DMRS Type 1 / 2. Specifically, with dmrs-TypeEnh enabled and DMRS Type 1 configured, each CDM group supports 4 ports with a single symbol and 8 ports with a double symbol; for DMRS Type 2, each CDM group supports 4 ports with a single symbol and 8 ports with a double symbol.

[0110] For ease of distinction, the DMRS configuration with the higher-level signaling configuration parameter dmrs-TypeEnh disabled is referred to as R15DMRS; the DMRS configuration with the higher-level signaling configuration parameter dmrs-TypeEnh enabled is referred to as R18DMRS.

[0111] In existing technologies, for UAM-like terminals, a possible sparse DMRS pattern has been designed, potentially supporting 6 / 12 / 24 CDM groups (the number of CDM groups is not limited). One possible example is that for a single symbol, each CDM group supports 2 DMRS ports; for a dual symbol, each CDM group supports 4 DMRS ports. Figure 3 shows the time-frequency resource configuration pattern for a DMRS based on DMRS Type 2 supporting 6 CDM groups. Each small square represents a RE, the horizontal axis represents the time domain (symbol), and the vertical axis represents the frequency domain (RE), for a total of 6 CDM groups. Therefore, for one CDM group, it occupies fewer RE resources in one resource block (RB) compared to existing R15 / R18 technologies, resulting in a sparser frequency domain.

[0112] For terminals employing sparse DMRS patterns, the network device multiplies the pseudo-random sequence r(m) by a power scaling factor. And OCC, perform resource mapping according to the above DMRS pattern, and send PDSCH DMRS.

[0113] Regarding DMRS pattern resource mapping, still taking PDSCH DMRS as an example, it is defined at antenna port p j With subcarrier spacing μ configured, the value on time-frequency resource (k,l) is:

[0114] k=12n+k′+Δconfiguration Type 2-6CDM group k′=0,1 n = 0, 1, ..., j = 0, 1, ..., υ-1

[0115] Where k represents the frequency domain resource subcarrier, and l represents the time domain resource OFDM symbol. Indicates the starting DMRS symbol index. This indicates the relative index of the DMRS symbol, and v represents the number of antenna ports assigned. This represents the PDSCH DMRS power scaling factor. f (k′) and w t (l′) denotes the frequency domain OCC and the time domain OCC, respectively. r(m) denotes a pseudo-random sequence (e.g., a Gold sequence).

[0116] The frequency domain OCC and time domain OCC mapping table associated with the DMRS pattern determines the frequency domain OCC and time domain OCC values ​​through the antenna port. The above time domain OCC and frequency domain OCC mapping table is shown in Figure 3 below:

[0117] Table 3 PDSCH DMRS OCC Mapping Table

[0118] In communication scenarios where both UAM terminals and terrestrial communication terminals coexist, mutual interference can occur between terrestrial and airborne communication. If the UAM terminal uses the frequency-sparse DMRS pattern shown in Figure 3, it will differ from the existing DMRS pattern used by the terrestrial communication terminal (as shown in Figures 2a and 2b). This will lead to a decrease in the interference estimation performance of the terrestrial communication terminal during communication, thereby affecting the demodulation performance of the terrestrial communication terminal or the terrestrial communication base station, resulting in a decrease in its communication reliability.

[0119] In view of this, this application provides a communication scheme in which a first communication device obtains information about at least one frequency domain resource subset in a first frequency domain resource set that (does not) transmit or receive the DMRS corresponding to the first communication device, so that other frequency domain resource subsets in the first frequency domain resource set do not transmit the DMRS corresponding to the first communication device, thereby reducing the DMRS resource overhead of the first communication device and reducing interference with other communication devices.

[0120] Based on the above-described communication system, the communication method provided by the embodiments of this application is described below:

[0121] This application relates to the interaction between a first communication device and a second communication device. In this embodiment, the first communication device may be a terminal device or a communication module in a terminal device, or a circuit or chip applied to the terminal device (such as a modem chip (also known as a baseband chip), or a system-on-chip (SoC) chip or system-in-package (SIP) chip containing a modem core). The second communication device may be an access network device or a communication module in an access network device, or a circuit or chip applied to the access network device (such as a modem chip), or an SoC chip or SIP chip containing a modem core.

[0122] Figure 4 shows a flowchart of a communication method provided in an embodiment of this application. Exemplarily, the method may include the following steps:

[0123] S401. The second communication device sends second information to the first communication device.

[0124] Accordingly, the first communication device receives the second information.

[0125] In this embodiment, the second communication device determines a first frequency domain resource set, which can be used for DMRS transmission between any two or three of the first, second, and third communication devices. In other words, the first frequency domain resource set includes the available DMRS frequency domain resources. For example, the first communication device can be the aforementioned UAM terminal; the third communication device can be a terrestrial communication terminal, another UAM terminal, or a network device; and the second communication device can be a network device.

[0126] The first frequency domain resource set includes at least one first frequency domain resource subset and at least one second frequency domain resource subset. For example, at least one first frequency domain resource subset is a subset of frequency domain resources in the first frequency domain resource set excluding at least one second frequency domain resource subset, and at least one second frequency domain resource subset is a subset of frequency domain resources in the first frequency domain resource set excluding at least one first frequency domain resource subset. In other words, at least one first frequency domain resource subset is a portion of the frequency domain resources in the first frequency domain resource set. For example, the first frequency domain resource set may include Z frequency domain resources, where Z is an integer greater than 1. One first frequency domain resource subset corresponds to one frequency domain resource, and at least one first frequency domain resource subset may include at most Z-1 frequency domain resources in the first frequency domain resource set. Similarly, one second frequency domain resource subset corresponds to one frequency domain resource, and at least one second frequency domain resource subset may include at most Z-1 frequency domain resources in the first frequency domain resource set. Furthermore, the first frequency domain resource set includes the aforementioned at least one first frequency domain resource subset and the aforementioned at least one second frequency domain resource subset.

[0127] For example, the first frequency domain resource set may be a resource block group (RBG) or a physical resource block bundle (PRB bundle). The resource block group or physical resource block bundle includes multiple RBs. The aforementioned frequency domain resource may be an RB, at least one first frequency domain resource subset may be at least one RB, and at least one second frequency domain resource subset may be at least one RB.

[0128] For example, the at least one first frequency domain resource subset or the at least one second frequency domain resource subset may also be predefined.

[0129] In this embodiment, compared to a terrestrial communication terminal, the first communication device may be a terminal using fewer DMRS resources. The second communication device needs to confirm whether the first communication device supports the ability to transmit or receive DMRS in at least one subset of first frequency domain resources in the first frequency domain resource set, or confirm whether the first communication device supports the ability not to transmit or receive DMRS in at least one subset of second frequency domain resources in the first frequency domain resource set. Therefore, the second communication device sends second information to the first communication device. This second information is used to indicate whether a request to report supports a first capability. The first capability represents the ability of the first communication device to transmit or receive DMRS in a portion of the available DMRS frequency domain resources (i.e., a subset of first frequency domain resources); or, it represents the ability of the first communication device not to transmit or receive DMRS in a portion of the available DMRS frequency domain resources (i.e., a subset of second frequency domain resources).

[0130] For example, the aforementioned second information may be carried in at least one of the following signaling: RRC signaling, downlink control information (DCI), and media access control element (MAC CE).

[0131] S402. The first communication device sends third information to the second communication device.

[0132] Accordingly, the second communication device receives the third information.

[0133] In one possible implementation, if the first communication device supports the first capability, after receiving a capability request (i.e., second information) from the second communication device, the first communication device sends third information to the second communication device. This third information indicates that the first communication device supports the first capability. Alternatively, this embodiment may default to the first communication device sending the third information to the second communication device, i.e., indicating support for the first capability.

[0134] For example, the third information may be 1 bit, which, when the value of the 1 bit is the first value, is used to indicate support for the first capability.

[0135] In another possible implementation, as an alternative to steps S401 and S402 described above, the first communication device may also proactively report support for the aforementioned first capability. For example, the first communication device may send a fourth message to the second communication device, indicating that the first communication device supports the aforementioned first capability. For example, this fourth message may be carried in at least one of the following signaling: RRC signaling, uplink control information (UCI).

[0136] It is understandable that the second communication device may also assume that the first communication device supports the first capability, or the protocol may predefine that the first communication device supports the first capability. Therefore, the above steps S401 and S402 are optional, and are shown as dashed lines in Figure 4.

[0137] S403. The second communication device sends the first information to the first communication device.

[0138] Accordingly, the first communication device receives the first information.

[0139] When the first communication device supports the aforementioned first capability, the second communication device sends first information to the first communication device to schedule the first communication device to transmit or receive DMRS. The first information is used to indicate information on at least one first frequency domain resource subset in the first frequency domain resource set that transmits or receives the DMRS corresponding to the first communication device, or, the first information is used to indicate information on at least one second frequency domain resource subset in the first frequency domain resource set that does not transmit or receive the DMRS corresponding to the first communication device. In other words, the first information is used to instruct the first communication device to transmit or receive DMRS on at least one first frequency domain resource subset, or to instruct the first communication device not to transmit or receive DMRS on at least one second frequency domain resource subset.

[0140] The first information indicating at least one subset of first frequency domain resources corresponding to the DMRS of the first communication device in the first frequency domain resource set can be implemented in the following three ways:

[0141] In implementation method A, the first information includes indication information of at least one subset of first frequency domain resources.

[0142] For example, the frequency domain resource subsets in the first frequency domain resource set are sorted in order, and each frequency domain resource subset corresponds to an index.

[0143] When the first information indicates information about at least one first frequency domain resource subset of the DMRS corresponding to the first communication device being transmitted or received in the first frequency domain resource set, and the first information includes an index of at least one first frequency domain resource subset, the first communication device can determine at least one first frequency domain resource subset of the DMRS being transmitted or received in the first frequency domain resource set based on the first information. For example, as shown in FIG5, which is an example of a time-frequency resource configuration pattern of a DMRS according to an embodiment of this application, the first frequency domain resource set includes: {RB0, RB1, RB2, RB3}, a total of 4 RBs, and the indices corresponding to {RB0, RB1, RB2, RB3} are 0, 1, 2, and 3, respectively. The first information may include index {3}, that is, indicating that the first communication device is transmitting or receiving DMRS on RB3.

[0144] In implementation method B, the first information includes indication information of the initial frequency domain resource subset in the first frequency domain resource set, and indication information of the first number of frequency domain resource subsets between each first frequency domain resource subset and the initial frequency domain resource subset in at least one first frequency domain resource subset.

[0145] For example, the frequency domain resource subsets in the first frequency domain resource set are sorted in order, and each frequency domain resource subset corresponds to an index.

[0146] When the first information indicates information about transmitting or receiving at least one first frequency domain resource subset of the DMRS corresponding to the first communication device in the first frequency domain resource set, the first information includes indication information of the starting frequency domain resource subset in the first frequency domain resource set, and indication information of the first number of frequency domain resource subsets between each first frequency domain resource subset in the at least one first frequency domain resource subset and the starting frequency domain resource subset. Then, the first communication device can determine at least one first frequency domain resource subset of the DMRS to be transmitted or received in the first frequency domain resource set based on the first information. Referring again to Figure 5, the RBG includes: {RB0, RB1, RB2, RB3}, a total of 4 RBs. The indices of {RB0, RB1, RB2, RB3} are 0, 1, 2, and 3, respectively. The index of the initial frequency domain resource subset RB0 in the first frequency domain resource set is {0}. The first information may include the index of RB0 and the number of RBs between RB3 and RB0, which is 3. Based on the index of RB0 and the number of RBs between RB3 and RB0, the first communication device can determine whether to send or receive the DMRS corresponding to the first communication device on RB3.

[0147] In implementation method C, the first information includes indication information of the initial first frequency domain resource subset in the first frequency domain resource set, and whether each frequency domain resource subset starting from the initial first frequency domain resource subset in the first frequency domain resource set transmits or receives DMRS.

[0148] For example, the frequency domain resource subsets in the first frequency domain resource set are sorted in order, and each frequency domain resource subset corresponds to an index.

[0149] When the first information indicates that at least one first frequency domain resource subset of the DMRS corresponding to the first communication device is being transmitted or received in the first frequency domain resource set, the first information includes indication information of the starting first frequency domain resource subset in the first frequency domain resource set, and whether each frequency domain resource subset in the first frequency domain resource set, starting from the starting first frequency domain resource subset, is transmitting or receiving DMRS. Then, the first communication device can determine at least one first frequency domain resource subset of the first frequency domain resource set that is transmitting or receiving DMRS based on the first information. For example, an RBG includes: {RB0, RB1, RB2, RB3, RB4, RB5}, a total of 6 RBs. The indices of {RB0, RB1, RB2, RB3, RB4, RB5} are 0, 1, 2, 3, 4, and 5, respectively. The index of the first frequency domain resource subset RB3 in the first frequency domain resource set is {3}. The first information may include the index of RB3 and the indication information of whether each RB in the RBG, starting from the starting RB3, transmits or receives DMRS (for example, the indication information is a bit map, and the indication information is "101"). Based on the index of RB3 and the indication information of whether each RB in the RBG, starting from the starting RB3, transmits or receives DMRS, the first communication device can determine whether to transmit or receive the DMRS corresponding to the first communication device on RB3 and RB5.

[0150] The first information indicating that at least one subset of second frequency domain resources corresponding to the DMRS of the first communication device is not transmitted or received in the first frequency domain resource set can be implemented in the following three ways:

[0151] In implementation method D, the first information includes indication information of at least one subset of second frequency domain resources.

[0152] For example, the frequency domain resource subsets in the first frequency domain resource set are sorted in order, and each frequency domain resource subset corresponds to an index.

[0153] When the first information indicates that at least one second frequency domain resource subset of the first frequency domain resource set does not transmit or receive DMRS corresponding to the first communication device, and the first information includes an index of at least one second frequency domain resource subset, the first communication device can determine at least one second frequency domain resource subset of the first frequency domain resource set that does not transmit or receive DMRS based on the first information. Referring again to Figure 5, the RBG includes: {RB0, RB1, RB2, RB3}, a total of 4 RBs, and the indices corresponding to {RB0, RB1, RB2, RB3} are 0, 1, 2, and 3, respectively. The first information may include the index {0, 1, 2}, that is, it indicates that the first communication device does not transmit or receive DMRS on RB0, RB1, and RB2.

[0154] In implementation method E, the first information includes indication information of the initial frequency domain resource subset in the first frequency domain resource set, and indication information of the second number of frequency domain resource subsets between each second frequency domain resource subset and the initial frequency domain resource subset in at least one second frequency domain resource subset.

[0155] For example, the frequency domain resource subsets in the first frequency domain resource set are sorted in order, and each frequency domain resource subset corresponds to an index.

[0156] When the first information indicates that at least one second frequency domain resource subset of the DMRS corresponding to the first communication device is not transmitted or received in the first frequency domain resource set, the first information includes indication information of the initial frequency domain resource subset in the first frequency domain resource set, and indication information of the second number of frequency domain resource subsets between each second frequency domain resource subset in the at least one second frequency domain resource subset and the initial frequency domain resource subset. Then, the first communication device can determine at least one second frequency domain resource subset of the first frequency domain resource set that is not transmitted or received in the first frequency domain resource set based on the first information. Referring again to Figure 5, the RBG includes four RBs: {RB0, RB1, RB2, RB3}. The indices of {RB0, RB1, RB2, RB3} are 0, 1, 2, and 3, respectively. The index of the initial frequency domain resource subset RB0 in the first frequency domain resource set is {0}. The first information may include the index of RB0 and the number of RBs that are separated from RB0 by RB0 to RB2, respectively, {0, 1, 2}. Based on the index of RB0 and the number of RBs that are separated from RB0 by RB0 to RB2, the first communication device can determine whether to transmit or receive DMRS on RB0, RB1, and RB2.

[0157] For example, the first information in implementation methods A to D can be carried in at least one of the following signaling methods: RRC signaling, MAC CE.

[0158] In implementation F, the first information includes indication information of the starting second frequency domain resource subset in the first frequency domain resource set, and whether each frequency domain resource subset starting from the starting second frequency domain resource subset in the first frequency domain resource set does not transmit or receive DMRS.

[0159] For example, the frequency domain resource subsets in the first frequency domain resource set are sorted in order, and each frequency domain resource subset corresponds to an index.

[0160] When the first information indicates that at least one second frequency domain resource subset of the first frequency domain resource set does not transmit or receive DMRS corresponding to the first communication device, the first information includes indication information of the starting second frequency domain resource subset in the first frequency domain resource set, and whether each frequency domain resource subset in the first frequency domain resource set, starting from the starting second frequency domain resource subset, does not transmit or receive DMRS. Then, the first communication device can determine at least one second frequency domain resource subset of the first frequency domain resource set that does not transmit or receive DMRS based on the first information. For example, an RBG includes: {RB0, RB1, RB2, RB3, RB4, RB5}, a total of 6 RBs. The indices of {RB0, RB1, RB2, RB3, RB4, RB5} are 0, 1, 2, 3, 4, and 5, respectively. The index of the first second frequency domain resource subset RB0 in the first frequency domain resource set is {0}. The first information may include the index of RB0 and the indication information of whether each RB in the RBG, starting from the first RB0, does not transmit or receive DMRS (for example, the indication information is a bit map, and the indication information is "111010"). Based on the index of RB3 and the indication information of whether each RB in the RBG, starting from the first RB0, does not transmit or receive DMRS, the first communication device can determine that it does not transmit or receive the DMRS corresponding to the first communication device on RB0 to RB2 and RB5.

[0161] In implementation G, the first information can also be the following indication information: this indication information indicates whether each frequency domain resource subset in the first frequency domain resource set transmits or receives DMRS. Based on this indication information, the first communication device can determine at least one first frequency domain resource subset in the first frequency domain resource set that transmits or receives DMRS, and / or at least one second frequency domain resource subset in the first frequency domain resource set that does not transmit or receive DMRS.

[0162] For example, the above-mentioned indication information may be a bitmap.

[0163] Referring again to Figure 5, the RBG includes: {RB0, RB1, RB2, RB3}, a total of 4 RBs, and the indices corresponding to {RB0, RB1, RB2, RB3} are 0, 1, 2, and 3, respectively.

[0164] When the first information indicates that at least one subset of the first frequency domain resources is used to transmit or receive the DMRS corresponding to the first communication device in the first frequency domain resource set, the indication information may be "0001", which indicates that the index or relative index of the RB that transmits or receives the DMRS corresponding to the first communication device among the four RBs is 3, that is, it means that the first communication device transmits or receives the DMRS on RB3.

[0165] When the first information indicates that at least one second frequency domain resource subset of the DMRS corresponding to the first communication device is not transmitted or received in the first frequency domain resource set, the indication information can be "1110", which is used to indicate that the index or relative index of the RB that does not transmit or receive the DMRS corresponding to the first communication device among the four RBs is 0, 1, or 2, that is, it means that the first communication device does not transmit or receive the DMRS on RB0 to RB2.

[0166] The first information in the above implementation method E can be carried in DCI.

[0167] In this embodiment, at least one subset of the first frequency domain resources in the first frequency domain resource set that transmits or receives the DMRS corresponding to the first communication device can adopt the existing DMRS patterns shown in Figures 2a and 2b. As shown in Figure 5, RB3 transmits or receives the DMRS corresponding to the first communication device, and RB3 adopts the single-symbol pattern of DMRS Type 2 shown in Figure 2a.

[0168] In another embodiment, the first communication device may also acquire the predefined first information described above, meaning that the first and second communication devices may not need to execute step S403. For example, the first information can be burned into the first communication device when it leaves the factory; or, for another example, the first information can be transmitted to the first communication device by a network operator through operation administration and maintenance (OAM).

[0169] S404. The first communication device and the second communication device transmit or receive DMRS on at least one first frequency domain resource subset based on the first information.

[0170] After the second communication device sends the first information and the first communication device receives the first information, the first communication device and the second communication device send or receive DMRS on at least one subset of first frequency domain resources based on the first information.

[0171] In this embodiment, DMRS can be used for any one or more of the following functions related to PDSCH or PUSCH: channel estimation, interference estimation, equalization, and demodulation.

[0172] When DMRS is used for channel estimation related to PDSCH, the second communication device transmits DMRS on at least one first frequency domain resource subset based on the first information, and the first communication device receives DMRS on at least one first frequency domain resource subset based on the first information.

[0173] When DMRS is used for channel estimation related to PUSCH, the first communication device transmits DMRS on at least one first frequency domain resource subset based on the first information, and the second communication device receives DMRS on at least one first frequency domain resource subset based on the first information.

[0174] After the first and second communication devices determine at least one first frequency domain resource subset for transmitting or receiving DMRS, or determine at least one second frequency domain resource subset for not transmitting or receiving DMRS, the second communication device may, with reference to the prior art, configure the DMRS configuration type through RRC signaling and jointly determine at least one resource element for transmitting or receiving DMRS in at least one first frequency domain resource subset by means of the antenna port index indicated by downlink control information (DCI).

[0175] Furthermore, the aforementioned first information also indicates the power scaling factor corresponding to the aforementioned DMRS, which is associated with the number of frequency domain resource subsets in the first frequency domain resource set and the number of frequency domain resource subsets in at least one of the first frequency domain resource subsets. For example, the power scaling factor can be indicated by DCI. The first communication device determines the power of the DMRS to be transmitted for PUSCH based on the power scaling factor indicated by the DCI, and transmits the DMRS based on the power; the second communication device determines the power of the DMRS to be transmitted for PDSCH based on the power scaling factor, and transmits the DMRS based on the power. For example, the power of the aforementioned DMRS can be multiplied by a factor equal to the ratio of the number of frequency domain resource subsets in the first frequency domain resource set to the number of frequency domain resource subsets in at least one of the first frequency domain resource subsets. Referring again to Figure 5, the RBG includes 4 RBs, wherein, when transmitting or receiving the DMRS corresponding to the first communication device on RB3, the power of the DMRS is multiplied by 4 / 1 = 4 times.

[0176] According to an embodiment of this application, a communication method is provided in which a first communication device obtains information about at least one frequency domain resource subset of a first frequency domain resource set that (does not) transmit or receive the DMRS corresponding to the first communication device. This prevents other frequency domain resource subsets in the first frequency domain resource set from transmitting the DMRS corresponding to the first communication device, thereby reducing the DMRS resource overhead of the first communication device and reducing interference with other communication devices. Furthermore, at least one first frequency domain resource subset can reuse the existing DMRS pattern, maintaining the same DMRS pattern as the terrestrial communication terminal, thus reducing the impact on interference estimation of the terrestrial communication terminal. Moreover, since the first communication device reduces the DMRS resource overhead, first communication devices in different cells can use DMRS resource frequency division, which is beneficial for the first / second communication devices to reduce the cross-terms of interference links introduced by the interference covariance calculation when estimating the interference covariance, thereby facilitating a more accurate interference estimation.

[0177] In another embodiment, the DMRS corresponding to the first communication device can also adopt a frequency-sparse DMRS pattern, that is, at least one first frequency domain resource subset corresponds to at least four code division multiplexing groups. Figure 6 shows a time-frequency resource configuration pattern for a DMRS according to an embodiment of this application. Similar to Figure 5, this RBG includes four RBs, where the DMRS corresponding to the first communication device is transmitted or received on RB3. Unlike Figure 5, RB3 adopts a frequency-sparse DMRS pattern. Figure 6 illustrates a DMRS pattern on RB3 using the DMRS Type 2 single symbol shown in Figure 3. The terrestrial communication terminal can use existing DMRS patterns as shown in Figures 2a and 2b. By adopting a frequency-sparse pattern, the DMRS corresponding to the first communication device can support mapping the DMRS of more communication devices, improving resource utilization and saving DMRS resources.

[0178] In this application, the phrase "sending information to... (e.g., a first communication device)" or the related illustrations in the accompanying drawings can be understood as the destination of the information being the first communication device. This can include sending information directly or indirectly to the first communication device. Similarly, the phrase "receiving information from... (e.g., a first communication device)" or "receiving information from... (e.g., a first communication device)" or the related illustrations in the accompanying drawings can be understood as the source of the information being the first communication device. This can include receiving information directly or indirectly from the first communication device. Information may undergo necessary processing between the source and destination, such as format changes, but the destination can understand the valid information from the source. Similar expressions in this application can be interpreted similarly, and will not be elaborated further here.

[0179] It is understood that this application uses the first and second communication devices as examples to illustrate the execution of the interaction, but this application does not limit the execution of the interaction. For example, the first communication device in the method provided by this application can also be a chip, chip system, or processor applied to the first communication device, or it can be a logic node, logic module, or software that can implement all or part of the functions of the first communication device; the second communication device in the method provided by this application can also be a chip, chip system, or processor applied to the second communication device, or it can be a logic node, logic module, or software that can implement all or part of the functions of the second communication device.

[0180] It is understood that, in order to achieve the functions in the above embodiments, the first communication device and the second communication device include hardware structures and / or software modules corresponding to each function. Those skilled in the art should readily recognize that, based on the units and method steps of the various examples described in conjunction with the embodiments disclosed in this application, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed by hardware or by computer software driving hardware depends on the specific application scenario and design constraints of the technical solution.

[0181] Figures 7 and 8 are schematic diagrams of possible communication devices provided in embodiments of this application. These communication devices can be used to implement the functions of the first or second communication device in the above method embodiments, and thus can also achieve the beneficial effects of the above method embodiments. In the embodiments of this application, the communication device can be one of the terminal devices 120a-120j shown in Figure 1, or it can be a network device 110a or 110b shown in Figure 1, or it can be a module (such as a chip) applied to a terminal device or a network device.

[0182] As shown in Figure 7, the communication device 700 includes a processing unit 710 and a transceiver unit 720. The communication device 700 is used to implement the functions of the first or second communication device in the method embodiment shown in Figure 4 above.

[0183] When the communication device 700 is used to implement the function of the first communication device: the transceiver unit 720 is used to implement one or more operations implemented by the first communication device in steps S401 to S404 of the embodiment shown in FIG4.

[0184] When the communication device 700 is used to implement the function of the second communication device: the transceiver unit 720 is used to implement one or more operations implemented by the second communication device in steps S401 to S404 of the embodiment shown in FIG4.

[0185] A more detailed description of the processing unit 710 and the transceiver unit 720 can be obtained directly from the relevant description in the method embodiment shown in Figure 4, and will not be repeated here.

[0186] When the aforementioned communication device is a chip applied to the first communication device, the first communication device chip implements the functions of the first communication device in the above method embodiments. The first communication device chip receives information from other modules (such as radio frequency modules or antennas) in the first communication device, which is sent to the first communication device by the second communication device; or, the first communication device chip sends information to other modules (such as radio frequency modules or antennas) in the first communication device, which is sent to the second communication device by the first communication device.

[0187] When the aforementioned communication device is a chip applied to a second communication device, the second communication device chip implements the functions of the second communication device in the above method embodiments. The second communication device chip receives information from other modules (such as radio frequency modules or antennas) in the second communication device, the information being sent from the first communication device to the second communication device; or, the second communication device chip sends information to other modules (such as radio frequency modules or antennas) in the second communication device, the information being sent from the second communication device to the first communication device.

[0188] Furthermore, it should be noted that the aforementioned transceiver unit and / or processing unit can be implemented through virtual modules. For example, the processing unit can be implemented through software functional units or virtual devices, and the transceiver unit can be implemented through software functions or virtual devices. Alternatively, the processing unit or transceiver unit can also be implemented through physical devices. For example, if the device is implemented using a chip / chip circuit, the transceiver unit can be an input / output circuit and / or a communication interface, performing input operations (corresponding to the aforementioned receiving operation) and output operations (corresponding to the aforementioned sending operation); the processing unit is an integrated processor, microprocessor, or integrated circuit.

[0189] As shown in Figure 8, the communication device 800 includes a processor 810 and may also include an interface circuit 820. The processor 810 and the interface circuit 820 are coupled to each other. It is understood that the interface circuit 820 can be a transceiver or an input / output interface. Optionally, the communication device 800 may also include a memory 830 (shown as a dashed line in Figure 8) for storing instructions executed by the processor 810, or storing input data required by the processor 810 to execute instructions, or storing data generated after the processor 810 executes instructions.

[0190] When the communication device 800 is used to implement the function of the first communication device: the interface circuit 820 is used to implement one or more operations implemented by the first communication device in steps S401 to S404 of the embodiment shown in FIG4.

[0191] When the communication device 800 is used to implement the function of the second communication device: the interface circuit 820 is used to implement one or more operations implemented by the second communication device in steps S401 to S404 of the embodiment shown in FIG4.

[0192] A more detailed description of the processor 810 and interface circuit 820 can be obtained directly from the relevant description in the method embodiment shown in Figure 4, and will not be repeated here.

[0193] When the aforementioned communication device is a chip applied to the first communication device, the first communication device chip implements the functions of the first communication device in the above method embodiments. The first communication device chip receiving information from the second communication device can be understood as the information being first received by other modules (such as an RF module or antenna) in the first communication device, and then sent to the chip of the first communication device by these modules. The first communication device chip sending information to the second communication device can be understood as the information being first sent to other modules (such as an RF module or antenna) in the first communication device, and then sent to the second communication device by these modules.

[0194] When the aforementioned communication device is a chip applied to a second communication device, the chip of the second communication device implements the functions of the second communication device in the above method embodiments. The second communication device chip receives information from the first communication device, which can be understood as the information being first received by other modules (such as an RF module or antenna) in the second communication device, and then sent to the chip of the second communication device by these modules. The second communication device chip sends information to the first communication device, which can be understood as the information being sent down to other modules (such as an RF module or antenna) in the second communication device, and then sent back to the first communication device by these modules.

[0195] In this application, entity A sends information to entity B, either directly or indirectly through other entities. Similarly, entity B receives information from entity A, either directly or indirectly through other entities. Entities A and B can be a second communication device or a first communication device, or modules within the second or first communication device. The sending and receiving of information can be between a second and a first communication device, such as between a base station and a first communication device; it can also be between two second communication devices, such as between a CU and a DU; or it can be between different modules within a single device, such as between a first communication device chip and other modules of the first communication device, or between a base station chip and other modules of the base station.

[0196] It is understood that in this application, "instruction" can include direct instruction, indirect instruction, explicit instruction, and implicit instruction. When describing instruction information for A, it can be understood that the instruction information carries A, directly instructs A, or indirectly instructs A. In this application, the information indicated by the instruction information is called the information to be instructed. In specific implementation, there are many ways to instruct the information to be instructed, such as, but not limited to, directly instructing the information to be instructed, such as the information to be instructed itself or its index, or indirectly instructing the information to be instructed by instructing other information, wherein there is an association between the other information and the information to be instructed. It is also possible to instruct only a part of the information to be instructed, while the other parts of the information to be instructed are known or agreed upon in advance. For example, the instruction of specific information can also be achieved by using the arrangement order of various information in advance (e.g., as specified by a protocol), thereby reducing the instruction overhead to a certain extent. The information to be instructed can be sent as a whole or divided into multiple sub-information to be sent separately, and the sending period and / or sending time of these sub-information can be the same or different. This application does not limit the specific sending method. The sending period and / or timing of these sub-information messages can be predefined, for example, according to a protocol, or configured by the transmitting device by sending configuration information to the receiving device.

[0197] It is understood that the processor in the embodiments of this application can be a central processing unit, or other general-purpose processors, digital signal processors, application-specific integrated circuits, field-programmable gate arrays, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. A general-purpose processor can be a microprocessor or any conventional processor.

[0198] The method steps in the embodiments of this application can be implemented in hardware or in software instructions executable by a processor. The software instructions can consist of corresponding software modules, which can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, registers, hard disks, portable hard disks, read-only optical discs, or any other form of storage medium known in the art. An exemplary storage medium is coupled to a processor, enabling the processor to read information from and write information to the storage medium. The storage medium can also be a component of the processor. The processor and the storage medium can reside in an application-specific integrated circuit (ASIC). Alternatively, the ASIC can reside in a base station or terminal device. The processor and the storage medium can also exist as discrete components in the base station or terminal device.

[0199] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of this application are performed entirely or partially. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user equipment, or other programmable device. The computer program or instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program or instructions can be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium, such as a floppy disk, hard disk, or magnetic tape; it can also be an optical medium, such as a digital video optical disc; or it can be a semiconductor medium, such as a solid-state drive. The computer-readable storage medium may be a volatile or non-volatile storage medium, or may include both types of storage media.

[0200] In the various embodiments of this application, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions between different embodiments are consistent and can be referenced by each other. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0201] Depending on whether the specification uses "optional": In this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. In the textual description of this application, the character " / " generally indicates an "or" relationship between the preceding and following related objects; in the formulas of this application, the character " / " indicates a "division" relationship between the preceding and following related objects. "Including at least one of A, B, and C" can mean: including A; including B; including C; including A and B; including A and C; including B and C; including A, B, and C.

[0202] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application. The order of the process numbers described above does not imply the order of execution; the execution order of each process should be determined by its function and internal logic.

Claims

1. A communication method applied to a first communication device, characterized in that, The method comprises: obtaining first information, the first information being used for indicating information of at least one first frequency domain resource subset in a first frequency domain resource set in which a demodulation reference signal (DMRS) corresponding to the first communication device is transmitted or received, or the first information indicating information of at least one second frequency domain resource subset in the first frequency domain resource set in which the DMRS corresponding to the first communication device is not transmitted or received, the first frequency domain resource set comprising a set of available DMRS frequency domain resources, the first frequency domain resource set comprising the at least one first frequency domain resource subset and the at least one second frequency domain resource subset; transmitting or receiving the DMRS on the at least one first frequency domain resource subset based on the first information.

2. The method of claim 1, wherein, The first information is obtained by: receiving the first information.

3. The method of claim 1 or 2, wherein, The method further comprises: receiving second information, the second information being used for indicating whether a first capability is supported, the first capability being a capability of transmitting or receiving the DMRS on at least one first frequency domain resource subset in the first frequency domain resource set, or the first capability being a capability of not transmitting or receiving the DMRS on at least one second frequency domain resource subset in the first frequency domain resource set; transmitting third information, the third information being used for indicating that the first capability is supported.

4. The method of claim 1 or 2, wherein, The method further comprises: transmitting fourth information, the fourth information being used for indicating that a first capability is supported, the first capability being a capability of transmitting or receiving the DMRS on at least one first frequency domain resource subset in the first frequency domain resource set, or the first capability being a capability of not transmitting or receiving the DMRS on at least one second frequency domain resource subset in the first frequency domain resource set.

5. The method of any one of claims 1-4, wherein, The first information comprises at least one of: indication information of the at least one first frequency domain resource subset; or indication information of the at least one second frequency domain resource subset; or indication information of a starting frequency domain resource subset in the first frequency domain resource set and indication information of a first number of frequency domain resource subsets spaced between each first frequency domain resource subset in the at least one first frequency domain resource subset and the starting frequency domain resource subset; or indication information of a starting frequency domain resource subset in the first frequency domain resource set and indication information of a second number of frequency domain resource subsets spaced between each second frequency domain resource subset in the at least one second frequency domain resource subset and the starting frequency domain resource subset.

6. The method of claim 5, wherein, The indication information is a bit map, the bit map being used for indicating whether the DMRS is transmitted or received in each frequency domain resource subset in the first frequency domain resource set.

7. The method of any one of claims 1-6, wherein, The first information is further used for indicating a power scaling factor corresponding to the DMRS, the power scaling factor being associated with a number of frequency domain resource subsets in the first frequency domain resource set and a number of frequency domain resource subsets in the at least one first frequency domain resource subset.

8. A communication method characterized by comprising: The method is applied to a second communication device, and the method comprises: transmitting first information, the first information being used for indicating information of at least one first frequency domain resource subset in a first frequency domain resource set in which a demodulation reference signal (DMRS) corresponding to the first communication device is transmitted or received, or the first information indicating information of at least one second frequency domain resource subset in the first frequency domain resource set in which the DMRS corresponding to the first communication device is not transmitted or received, the first frequency domain resource set including a set of available DMRS frequency domain resources, the first frequency domain resource set including the at least one first frequency domain resource subset and the at least one second frequency domain resource subset; transmitting or receiving the DMRS on the at least one first frequency domain resource subset based on the first information.

9. The method of claim 8, wherein, The method further includes: transmitting second information, the second information being used for indicating whether a first capability is supported, the first capability being a capability of transmitting or receiving the DMRS on at least one first frequency domain resource subset in the first frequency domain resource set, or the first capability being a capability of not transmitting or receiving the DMRS on at least one second frequency domain resource subset in the first frequency domain resource set; receiving third information, the third information being used for indicating that the first capability is supported.

10. The method of claim 8, wherein, The method further includes: receiving fourth information, the fourth information being used for indicating that a first capability is supported, the first capability being a capability of transmitting or receiving the DMRS on at least one first frequency domain resource subset in the first frequency domain resource set, or the first capability being a capability of not transmitting or receiving the DMRS on at least one second frequency domain resource subset in the first frequency domain resource set.

11. The method of any one of claims 8-10, wherein, The first information includes at least one of: indication information of the at least one first frequency domain resource subset; or indication information of the at least one second frequency domain resource subset; or indication information of a starting frequency domain resource subset in the first frequency domain resource set, and indication information of a first number of frequency domain resource subsets spaced between each first frequency domain resource subset in the at least one first frequency domain resource subset and the starting frequency domain resource subset; or indication information of a starting frequency domain resource subset in the first frequency domain resource set, and indication information of a second number of frequency domain resource subsets spaced between each second frequency domain resource subset in the at least one second frequency domain resource subset and the starting frequency domain resource subset.

12. The method of claim 11, wherein, The indication information is a bit map, the bit map being used for indicating whether the DMRS is transmitted or received in each frequency domain resource subset in the first frequency domain resource set.

13. The method of any one of claims 8-12, wherein, The first information is further used for indicating a power scaling factor corresponding to the DMRS, the power scaling factor being associated with a number of frequency domain resource subsets in the first frequency domain resource set, a number of frequency domain resource subsets in the at least one first frequency domain resource subset.

14. A communication method, comprising: The method includes: obtaining first information, the first information being used for indicating information of at least one first frequency domain resource subset in a first frequency domain resource set in which a demodulation reference signal (DMRS) corresponding to the first communication device is transmitted or received, or the first information being used for indicating information of at least one second frequency domain resource subset in the first frequency domain resource set in which the DMRS corresponding to the first communication device is not transmitted or received, the first frequency domain resource set including a set of available DMRS frequency domain resources, the first frequency domain resource set including the at least one first frequency domain resource subset and the at least one second frequency domain resource subset, the at least one first frequency domain resource subset corresponding to at least four code division multiplexing groups; transmitting or receiving the DMRS on the at least one first frequency domain resource subset based on the first information.

15. The method of claim 14, wherein, The obtaining of the first information includes receiving the first information.

16. The method of claim 14 or 15, wherein, The method further includes: receiving second information, the second information being used for indicating whether a first capability is supported, the first capability being a capability of transmitting or receiving the DMRS on at least one first frequency domain resource subset in the first frequency domain resource set, or the first capability being a capability of not transmitting or receiving the DMRS on at least one second frequency domain resource subset in the first frequency domain resource set; transmitting third information, the third information being used for indicating that the first capability is supported.

17. The method of any one of claims 14 to 16, wherein, The method further includes: transmitting fourth information, the fourth information being used for indicating that a first capability is supported, the first capability being a capability of transmitting or receiving the DMRS on at least one first frequency domain resource subset in the first frequency domain resource set, or the first capability being a capability of not transmitting or receiving the DMRS on at least one second frequency domain resource subset in the first frequency domain resource set.

18. The method of any one of claims 14 to 17, wherein, The first information includes at least one of the following: indication information of the at least one first frequency domain resource subset; or indication information of the at least one second frequency domain resource subset; or indication information of a starting frequency domain resource subset in the first frequency domain resource set and indication information of a first quantity of frequency domain resource subsets spaced between each first frequency domain resource subset in the at least one first frequency domain resource subset and the starting frequency domain resource subset; or indication information of a starting frequency domain resource subset in the first frequency domain resource set and indication information of a second quantity of frequency domain resource subsets spaced between each second frequency domain resource subset in the at least one second frequency domain resource subset and the starting frequency domain resource subset; or indication information of a starting first frequency domain resource subset in the first frequency domain resource set and information of whether the DMRS is transmitted or received on each frequency domain resource subset in the first frequency domain resource set starting from the starting first frequency domain resource subset; or indication information of a starting second frequency domain resource subset in the first frequency domain resource set and information of whether the DMRS is not transmitted or received on each frequency domain resource subset in the first frequency domain resource set starting from the starting second frequency domain resource subset. ​ 19. The method of any one of claims 14 to 18, wherein, The indication information is a bit map, and the bit map is used to indicate whether each frequency domain resource subset in the first frequency domain resource set transmits or receives the DMRS.

20. The method of any one of claims 14 to 19, wherein, The first information is also used to indicate a power scaling factor corresponding to the DMRS, and the power scaling factor is associated with a number of frequency domain resource subsets in the first frequency domain resource set and a number of frequency domain resource subsets in the at least one first frequency domain resource subset.

21. A method of communication, comprising: The method comprises: transmitting first information used to indicate information of at least one first frequency domain resource subset in a first frequency domain resource set that transmits or receives a demodulation reference signal (DMRS) corresponding to the first communication device, or the first information indicating information of at least one second frequency domain resource subset in the first frequency domain resource set that does not transmit or receive the DMRS corresponding to the first communication device, the first frequency domain resource set comprising a set of available DMRS frequency domain resources, the first frequency domain resource set comprising the at least one first frequency domain resource subset and the at least one second frequency domain resource subset, the at least one first frequency domain resource subset corresponding to at least four code division multiplexing groups; transmitting or receiving the DMRS on the at least one first frequency domain resource subset based on the first information.

22. The method of claim 21, wherein, The first information is obtained by receiving the first information.

23. The method of claim 21 or 22, wherein, The method further comprises: transmitting second information used to indicate whether a first capability is supported, the first capability being a capability of transmitting or receiving the DMRS on at least one first frequency domain resource subset in the first frequency domain resource set, or the first capability being a capability of not transmitting or receiving the DMRS on at least one second frequency domain resource subset in the first frequency domain resource set; receiving third information used to indicate that the first capability is supported.

24. The method of any one of claims 21 to 23, wherein, The method further comprises: receiving fourth information used to indicate that a first capability is supported, the first capability being a capability of transmitting or receiving the DMRS on at least one first frequency domain resource subset in the first frequency domain resource set, or the first capability being a capability of not transmitting or receiving the DMRS on at least one second frequency domain resource subset in the first frequency domain resource set.

25. The method of any one of claims 21 to 24, wherein, The first information comprises at least one of: indication information of the at least one first frequency domain resource subset; or indication information of the at least one second frequency domain resource subset; or indication information of a starting frequency domain resource subset in the first frequency domain resource set and first number indication information of frequency domain resource subsets spaced between each first frequency domain resource subset in the at least one first frequency domain resource subset and the starting frequency domain resource subset; or indication information of a starting frequency domain resource subset in the first frequency domain resource set and second number indication information of frequency domain resource subsets spaced between each second frequency domain resource subset in the at least one second frequency domain resource subset and the starting frequency domain resource subset; or indication information of a starting second frequency domain resource subset in the first frequency domain resource set, and whether each frequency domain resource subset in the first frequency domain resource set starting from the starting second frequency domain resource subset does not transmit or receive the DMRS. Or indication information of a starting second frequency domain resource subset in the first frequency domain resource set, and whether each frequency domain resource subset in the first frequency domain resource set starting from the starting second frequency domain resource subset does not transmit or receive the DMRS.

26. The method of any one of claims 21 to 25, wherein, The indication information is a bit map, which is used to indicate whether each frequency domain resource subset in the first frequency domain resource set transmits or receives the DMRS.

27. The method of any one of claims 21 to 26, wherein, The first information is also used to indicate a power scaling factor corresponding to the DMRS, which is associated with the number of frequency domain resource subsets in the first frequency domain resource set, the number of frequency domain resource subsets in the at least one first frequency domain resource subset.

28. A communications device, characterized by A module for implementing the method of any one of claims 1-7, or a module for implementing the method of any one of claims 8-13, or a module for implementing the method of any one of claims 14-20, or a module for implementing the method of any one of claims 21-27.

29. A communications device, characterized by A processor and an interface circuit for receiving signals from other communication devices and transmitting signals to the processor or sending signals from the processor to other communication devices, the processor being used to implement the method of any one of claims 1-7, or the method of any one of claims 8-13, or the method of any one of claims 14-20, or the method of any one of claims 21-27 through logic circuit or executing code instructions.

30. A computer-readable storage medium, characterized in that, The storage medium stores a computer program or instructions, when the computer program or instructions are executed by a communication device, the method of any one of claims 1-7 is implemented, or the method of any one of claims 8-13 is implemented, or the method of any one of claims 14-20 is implemented, or the method of any one of claims 21-27 is implemented.

31. A computer program product, characterised in that, The computer program product contains the program instructions involved, when the program instructions involved are executed, the method of any one of claims 1-7 is implemented, or the method of any one of claims 8-13 is implemented, or the method of any one of claims 14-20 is implemented, or the method of any one of claims 21-27 is implemented.

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