Communication method and communication apparatus

Abstract

The present application relates to the technical field of communications. Provided are a communication method and a communication apparatus. The method comprises: a network device configuring a first reference signal resource set, wherein the first reference signal resource set is used for acquiring downlink channel information, the first reference signal resource set comprises N1 reference signal resources, at least one of the N1 reference signal resources comprises one reference signal port, and different reference signal ports are mapped to different time-domain units; or, the network device configuring a second reference signal resource set, wherein the second reference signal resource set is used for acquiring downlink channel information, the second reference signal resource set comprises N2 reference signal resources, at least one of the N2 reference signal resources comprises P reference signal ports, and on the basis of a high-layer configuration, it is indicated that the P reference signal ports are respectively mapped to different time-domain units. In this way, the probability of the presence of a high PAPR is reduced.

Description

Communication methods and communication devices

[0001] This application claims priority to Chinese Patent Application No. 202410925504.8, filed on July 10, 2024, entitled "Communication Method and Communication Apparatus", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communications, and particularly to communication methods and devices in the field of communications. Background Technology

[0003] With the development of communication technology, the frequency bands used for communication are gradually being upgraded, for example, from the 5G band to 6G or higher. This upgrade in frequency bands allows for an increase in the number of antennas on terminal and network devices, further improving the performance of massive multiple-input multiple-out (MIMO). However, the increased number of antennas makes channel measurement a significant problem and bottleneck.

[0004] Currently, network devices can use beamforming to obtain downlink channel information by measuring the channel sounding reference signal (SRS).

[0005] However, this implementation method can lead to a high peak-to-average power ratio (PAPR). Summary of the Invention

[0006] This application provides a communication method and a communication device that helps reduce the probability of high PAPR.

[0007] In a first aspect, a communication method is provided, the method comprising: configuring a first reference signal resource set, the first reference signal resource set being used to acquire downlink channel information, the first reference signal resource set including N1 reference signal resources, at least one of the N1 reference signal resources including a reference signal port, different reference signal ports being mapped to different time domain units, and N1 being an integer greater than 1.

[0008] The communication method provided in this application, in order to obtain downlink channel information, allows configuring a reference signal resource to include a reference signal port among multiple reference signal resources, and mapping different reference signal ports onto different time domain units. This enables different reference signals to be transmitted at different times, which helps reduce the probability of high PAPR (Packet Relay Rate).

[0009] In conjunction with the first aspect, in some implementations of the first aspect, N1 reference signal resources correspond to M1 comb offsets, where M1 is greater than or equal to 1 and less than N1.

[0010] The number of comb offsets M1 is less than the number of reference signal resources N1, and can be used to indicate that N1 reference signal resources correspond to the same comb offset.

[0011] In this way, when a network device indicates a comb offset, it can indicate a maximum of M1, which is beneficial to reduce the indication overhead compared to indicating N1 comb offsets.

[0012] In conjunction with the first aspect, in some implementations of the first aspect, N1 reference signal resources correspond to L1 cyclic shifts (CS), where L1 is greater than or equal to 1 and less than N1.

[0013] The number of CSs, L1, is less than the number of reference signal resources, N1, and can be used to indicate that N1 reference signal resources correspond to the same CS.

[0014] In this way, when a network device indicates a CS, it can indicate a maximum of L1 CSs, which helps to reduce the indication overhead compared to indicating N1 CSs.

[0015] In conjunction with the first aspect, in some implementations of the first aspect, the method further includes: indicating a first set of reference signal resources.

[0016] The network device indicates a first reference signal resource set, and the terminal device can communicate based on the configured first reference signal resource set, which helps to reduce the probability of high PAPR.

[0017] In conjunction with the first aspect, in some implementations of the first aspect, the method further includes: receiving terminal device capability information; configuring a first reference signal resource set, including: configuring the first reference signal resource set in response to the terminal device capability information.

[0018] Terminal device capability information can be reported, including the radio frequency capabilities of the terminal device. Network devices can then use this information to determine whether to configure the first reference signal resource set. This helps network devices determine the appropriate time to configure the first reference signal resource set.

[0019] In conjunction with the first aspect, in some implementations of the first aspect, the reference signals corresponding to the N1 reference signal resources are beamformed or precoded signals. Thus, this method is suitable for transmitting reference signals using beamforming or precoding, which helps alleviate channel aging and improve channel estimation accuracy.

[0020] In conjunction with the first aspect, in some implementations of the first aspect, the number of reference signal ports included in the N1 reference signal resources is less than the number of antennas of the terminal device. Since the number of reference signal ports included in the N1 reference signal resources is less than the number of antennas of the terminal device, it can be explained that the terminal device can transmit reference signals using beamforming or precoding based on this configuration, which helps to alleviate channel aging and improve channel estimation accuracy.

[0021] Secondly, a communication method is provided, the method comprising: configuring a second reference signal resource set, the second reference signal resource set being used to acquire downlink channel information, the second reference signal resource set including N2 reference signal resources, at least one of the N2 reference signal resources including P reference signal ports, wherein N2 is an integer greater than or equal to 1, and P is an integer greater than or equal to 2; and configuring the P reference signal ports to be mapped to different time domain units based on higher-layer configuration.

[0022] In conjunction with the second aspect, in some implementations of the second aspect, P reference signal ports correspond to M2 comb offsets, where M2 is greater than or equal to 1 and less than P.

[0023] The number of comb offsets, M2, is less than the number of reference signal ports, P, and can be used to indicate that P reference signal ports correspond to the same comb offset.

[0024] In this way, when a network device indicates a comb offset, it can indicate up to M2, which is more efficient than indicating P comb offsets, thus reducing the overhead of the indication.

[0025] In conjunction with the second aspect, in some implementations of the second aspect, the P reference signal ports correspond to L2 cyclic shift CS, where L2 is greater than or equal to 1 and less than P.

[0026] The number of CSs, L2, is less than the number of reference signal ports, P, and can be used to indicate that P reference signal ports correspond to the same CS.

[0027] In this way, when a network device indicates a CS, it can indicate up to L2 CSs, which helps to reduce the indication overhead compared to indicating P CSs.

[0028] In conjunction with the second aspect, in some implementations of the second aspect, the method further includes: indicating a second set of reference signal resources.

[0029] The network device indicates a second set of reference signal resources, and the terminal device can communicate based on the configured second set of reference signal resources, which helps to reduce the occurrence of PAPR problems.

[0030] In conjunction with the second aspect, in some implementations of the second aspect, the method further includes: receiving terminal device capability information; configuring a second reference signal resource set, including: configuring the second reference signal resource set in response to the terminal device capability information. This facilitates the network device in determining the timing for configuring the second reference signal resource set.

[0031] In conjunction with the second aspect, in some implementations of the second aspect, the reference signals corresponding to the N2 reference signal resources are beamformed or precoded signals. Thus, this method is suitable for transmitting reference signals using beamforming or precoding, which helps alleviate channel aging and improve channel estimation accuracy.

[0032] In conjunction with the second aspect, in some implementations of the second aspect, the number of reference signal ports included in the N2 reference signal resources is less than the number of antennas of the terminal device. Since the number of reference signal ports included in the N2 reference signal resources is less than the number of antennas of the terminal device, it can be explained that the terminal device can transmit reference signals using beamforming or precoding based on this configuration, which helps to alleviate channel aging and improve channel estimation accuracy.

[0033] Thirdly, a communication device is provided, comprising a processing unit and an interface unit. The processing unit is configured to: configure a first set of reference signal resources, the first set of reference signal resources being used to acquire downlink channel information, the first set of reference signal resources including N1 reference signal resources, at least one of the N1 reference signal resources including a reference signal port, different reference signal ports being mapped to different time-domain units, and N1 being an integer greater than 1. The interface unit is configured to perform receiving or transmitting steps.

[0034] In conjunction with the third aspect, in some implementations of the third aspect, N1 reference signal resources correspond to M1 comb offsets, where M1 is greater than or equal to 1 and less than N1.

[0035] In conjunction with the third aspect, in some implementations of the third aspect, N1 reference signal resources correspond to L1 cyclic shifters CS, where L1 is greater than or equal to 1 and less than N1.

[0036] In conjunction with the third aspect, in some implementations of the third aspect, the aforementioned interface unit is used to: indicate the first reference signal resource set.

[0037] In conjunction with the third aspect, in some implementations of the third aspect, the interface unit is used to: receive terminal device capability information; the processing unit is used to: configure a first reference signal resource set in response to the terminal device capability information.

[0038] In conjunction with the third aspect, in some implementations of the third aspect, the reference signals corresponding to the N1 reference signal resources are beamformed or pre-coded signals.

[0039] In conjunction with the third aspect, in some implementations of the third aspect, the number of reference signal ports included in the N1 reference signal resources is less than the number of antennas in the terminal device.

[0040] Fourthly, a communication device is provided, comprising: a processing unit and an interface unit. The processing unit is configured to: configure a second set of reference signal resources, the second set of reference signal resources being used to acquire downlink channel information, the second set of reference signal resources comprising N2 reference signal resources, at least one of the N2 reference signal resources comprising P reference signal ports, wherein N2 is an integer greater than or equal to 1, and P is an integer greater than or equal to 2; the interface unit is configured to: instruct, based on higher-layer configuration, that the P reference signal ports are respectively mapped to different time-domain units.

[0041] In conjunction with the fourth aspect, in some implementations of the fourth aspect, P reference signal ports correspond to M2 comb offsets, where M2 is greater than or equal to 1 and less than P.

[0042] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the P reference signal ports correspond to L2 cyclic shifters CS, where L2 is greater than or equal to 1 and less than P.

[0043] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the interface unit is also used to: indicate the second set of reference signal resources.

[0044] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the interface unit is further configured to: receive terminal device capability information; the processing unit is further configured to: configure a second reference signal resource set in response to the terminal device capability information.

[0045] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the reference signals corresponding to the N2 reference signal resources are beamformed or pre-coded signals.

[0046] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the number of reference signal ports included in the N2 reference signal resources is less than the number of antennas in the terminal device.

[0047] Fifthly, this application provides a communication device including a processor coupled to a memory, which can be used to execute instructions in the memory to implement the method in any of the possible implementations of the first or second aspect described above. Optionally, the device further includes a memory. Optionally, the device further includes a communication interface, to which the processor is coupled.

[0048] In one implementation, the device is a network device. When the device is a network device, the communication interface can be a transceiver, or an input / output interface.

[0049] In another implementation, the device is a chip configured in a network device. When the device is a chip configured in a network device, the aforementioned communication interface can be an input / output interface.

[0050] In a sixth aspect, a processor is provided, comprising: an input circuit, an output circuit, and a processing circuit. The processing circuit is used to receive signals through the input circuit and transmit signals through the output circuit, causing the processor to execute the method in any possible implementation of the first or second aspect described above.

[0051] In the specific implementation process, the processor can be a chip, the input circuit can be an input pin, the output circuit can be an output pin, and the processing circuit can be a transistor, gate circuit, flip-flop, and various logic circuits. The input signal received by the input circuit can be received and input by, for example, but not limited to, a receiver, and the signal output by the output circuit can be output to, for example, but not limited to, a transmitter and transmitted by the transmitter. Furthermore, the input circuit and the output circuit can be the same circuit, which is used as the input circuit and the output circuit at different times. This application does not limit the specific implementation of the processor and various circuits.

[0052] In a seventh aspect, a processing apparatus is provided, including a processor and a memory. The processor is configured to read instructions stored in the memory and to receive signals via a receiver and transmit signals via a transmitter to execute the method in any of the possible implementations of the first or second aspect described above.

[0053] Optionally, there may be one or more processors and one or more memories.

[0054] Alternatively, the memory can be integrated with the processor, or the memory can be set up separately from the processor.

[0055] In the specific implementation process, the memory can be a non-transitory memory, such as read-only memory (ROM), which can be integrated with the processor on the same chip or set on different chips. This application does not limit the type of memory or the way the memory and processor are set.

[0056] It should be understood that the relevant data interaction process, such as sending instruction information, can be a process of outputting instruction information from the processor, and receiving capability information can be a process of the processor receiving input capability information. Specifically, the processed output data can be output to the transmitter, and the input data received by the processor can come from the receiver. Here, the transmitter and receiver can be collectively referred to as transceivers.

[0057] The processing device in the seventh aspect above can be a chip. The processor can be implemented in hardware or software. When implemented in hardware, the processor can be a logic circuit, integrated circuit, etc. When implemented in software, the processor can be a general-purpose processor that reads software code stored in memory. The memory can be integrated into the processor or located outside the processor and exist independently.

[0058] Eighthly, a computer program product is provided, comprising: a computer program (also referred to as code or instructions) that, when executed, causes a computer to perform the method in any possible implementation of the first or second aspect described above.

[0059] Ninthly, a computer-readable storage medium is provided that stores a computer program (also referred to as code or instructions) that, when executed on a computer, causes the computer to perform the methods in any possible implementation of the first or second aspect described above. Attached Figure Description

[0060] Figure 1 is a schematic diagram of a communication system provided in an embodiment of this application;

[0061] Figure 2 is a schematic diagram of another communication system provided in an embodiment of this application;

[0062] Figure 3 is a schematic flowchart of a communication method provided in an embodiment of this application;

[0063] Figure 4 is a schematic flowchart of another communication method provided in an embodiment of this application;

[0064] Figure 5 is a schematic flowchart of another communication method provided in an embodiment of this application;

[0065] Figure 6 is a schematic block diagram of a communication device provided in an embodiment of this application;

[0066] Figure 7 is a schematic block diagram of another communication device provided in an embodiment of this application. Detailed Implementation

[0067] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0068] To better understand the embodiments of this application, the terminology involved in the embodiments of this application will be introduced first.

[0069] 1. SRS

[0070] SRS can be used for channel estimation.

[0071] For example, a terminal device can send an SRS to a network device, which can then use the SRS to obtain uplink channel information for scheduling. In a TDD communication system, the network device can also utilize channel exclusivity to obtain downlink channel information by measuring the SRS, and then use this channel information for precoding to transmit data to the terminal device. Here, a TDD communication system refers to a system where the transmit and receive signals share the same radio frequency, but the uplink and downlink use different time slots for communication.

[0072] The SRS resources used by the terminal device when sending SRS can be configured by the network device. SRS resources may include the number of SRS ports. In some examples, the number of SRS ports can be 1, 2, 4, or 8.

[0073] 2. Uplink and downlink channel reciprocity

[0074] Since electromagnetic wave propagation is reversible, in scenarios where uplink and downlink channels operate on the same frequency band and from the same transceiver antenna, the uplink and downlink channels have equivalence characteristics, meaning that path loss, delay, and phase are the same for both uplink and downlink.

[0075] In an ideal scenario, the relationship between the uplink and downlink channels can be expressed as:

[0076] 3. Resource block

[0077] In new radio (NR), a resource block (RB) is defined as 12 consecutive subcarriers in the frequency domain.

[0078] 4. Terminal equipment

[0079] The terminal equipment in this application embodiment can also be referred to as: user equipment (UE), mobile station (MS), mobile terminal (MT), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent, or user device, etc.

[0080] Terminal devices can be devices that provide voice / data connectivity to users, such as handheld devices with wireless connectivity, in-vehicle devices, etc. Currently, examples of terminal devices include: mobile phones, tablets, laptops, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving vehicles, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in 5G networks, or future public land mobile communication networks. Terminal devices in a network (PLMN), etc., are not limited to this in the embodiments of this application.

[0081] Furthermore, in this embodiment, the terminal device can also be a terminal device in an Internet of Things (IoT) system. IoT is an important component of the future development of information technology. Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network of human-machine interconnection and object-to-object interconnection.

[0082] 5. Network equipment

[0083] The network device in this application embodiment can be a device that provides wireless communication functions for terminal devices. This network device can also be called an access network device or a wireless access network device. It can be a transmission reception point (TRP), an evolved NodeB (eNB or eNodeB) in an LTE system, a home base station (e.g., home evolved NodeB, or home Node B, HNB), a base band unit (BBU), or a wireless controller in a cloud radio access network (CRAN) scenario. Alternatively, the network device can be a relay station, access point, vehicle-mounted device, wearable device, or network device in a 5G network or a network device in a future evolved PLMN network. It can be an access point (AP) in a WLAN, or a new wireless... In a radio (NR) system, a gNB can be a satellite base station in a satellite communication system, or a device that performs base station functions in device-to-device (D2D), vehicle-to-everything (V2X), or machine-to-machine (M2M) communication. The embodiments in this application are not limited to this.

[0084] In a network architecture, network devices may include centralized unit (CU) nodes, distributed unit (DU) nodes, radio access network (RAN) devices including CU nodes and DU nodes, or RAN devices comprising control plane CU nodes (CU-CP nodes), user plane CU nodes (CU-UP nodes), and DU nodes.

[0085] Network equipment provides services to terminal devices within a cell. Terminal devices communicate with the network equipment or other equipment corresponding to the cell through transmission resources (e.g., frequency domain resources, or spectrum resources) allocated by the network equipment. The network equipment can be a macro base station (e.g., a macro eNB or macro gNB) or a base station corresponding to a small cell. Small cells can include: metro cells, micro cells, pico cells, femto cells, etc. These small cells have the characteristics of small coverage area and low transmission power, and are suitable for providing high-speed data transmission services.

[0086] Compared to 5G bands, larger base station arrays and larger UE arrays are an inevitable trend in the evolution of MIMO in the 6G band. From the base station side, compared to the common 64-transmit (64T) deployment in 5G bands (e.g., 2.6GHz), the 6G band can achieve 256T channels simply by doubling the vertical antenna array, achieving higher spatial resolution and significantly improving the spectral efficiency of future massive MIMO. Similarly, on the UE side, the common 4-receive (4R) terminals are expected to support more channels (2X to 4X) in the future, improving overall transmission / reception performance.

[0087] However, while more channels bring better performance, measuring thousands of ports becomes a significant problem and bottleneck. Currently, base stations can use SRS to obtain uplink channel information for scheduling. For TDD communication systems, base stations can also utilize channel exclusivity to obtain downlink channel information by measuring SRS, and then use this channel information for precoding to transmit data to the UE.

[0088] For example, Figure 1 shows a schematic diagram of a communication system. As shown in Figure 1, the communication system includes a base station 110 and a UE 120. The base station 110 may have 256 antennas, and the UE 120 may have 8 antennas. It should be noted that only the antennas are shown in Figure 1, and the specific number is not shown.

[0089] Base station 110 can configure N for UE 120 Rx With 8 SRS ports, UE 120 can utilize N through these 8 antennas. Rx Each SRS port transmits SRS data, and each antenna transmits at the same power. Because the transmission power of each antenna is the same, the energy is uniform and omnidirectional. In Figure 1, the area marked with a dashed line represents the omnidirectional energy. Wherein, N... Rx It can have the same number of antennas as UE 120, i.e., N. Rx =8.

[0090] As the number of UEs served by base station 110 surges, base station 110 needs to allocate more SRS resources and configure more SRS ports, which will lengthen the SRS period and accelerate channel aging. Using higher frequency bands to transmit SRS signals will lead to faster channel time-varying, also accelerating channel aging. Furthermore, compared to the 5G band, the 6G band has greater propagation loss, resulting in reduced SRS signal amplitude. A weaker SRS signal leads to a lower SRS signal-to-noise ratio. Base station 110 performing channel estimation based on a lower SRS ratio will reduce the accuracy of channel estimation.

[0091] In summary, using the 6GHz band to transmit SRS will lead to channel aging and insufficient channel estimation accuracy.

[0092] In some implementations, the UE can use beamforming to transmit SRS, which helps alleviate channel aging and improve channel estimation accuracy. This method is described below with reference to Figure 2.

[0093] For example, Figure 2 shows a schematic diagram of a communication system. As shown in Figure 2, the communication system includes a base station 210 and a UE 220. The base station 210 may have 256 antennas, and the UE 220 may have 8 antennas. It should be noted that only the antennas are shown in Figure 2, and the specific number is not shown. The base station 210 can configure N antennas for the UE 220. layer One SRS port. N layer The number of antennas is less than that of UE 220, i.e., N layer <8.

[0094] Base station 210 can send channel state information reference signal (CSI-RS) to UE 220. UE 220 can obtain the downlink channel based on the CSI-RS signal and determine the number of SRS ports, i.e., N. layer And downlink channels, determine N for each antenna layer Each beamforming right. UE 220 can use these N beamforming rights simultaneously. layer Each beamforming weight precodes the SRS to be transmitted on each antenna, resulting in N. layer Stream SRS. UE 220 can simultaneously pass through NN layer Each of the N SRS ports sends these N layer SRS flow.

[0095] In this implementation, only N is needed. layer Each port has different transmit power for each antenna, allowing power to converge towards the strongest currents, thus concentrating energy in the effective flow count of the channel. In Figure 2, the flows filled with black have greater power than those filled with white. This helps alleviate channel aging and improves channel estimation accuracy.

[0096] However, when N layer When the value is greater than 1, UE 220 can use N at the same time. layer Each shaping right sends N layer Stream SRS may lead to high PAPR, reducing the accuracy of channel estimation.

[0097] In view of this, embodiments of this application provide a communication method and a communication device that map different SRS ports onto different symbols, which helps to reduce the probability of high PAPR.

[0098] To facilitate understanding of the method provided in the embodiments of the present application, the following points are first explained as follows:

[0099] First, in the embodiments of the present application, terms such as "first" and "second" are used to distinguish identical or similar items with basically the same functions and roles. For example, the first reference signal resource set and the second reference signal resource set are only used to distinguish different reference signal resource sets, and do not limit their order. Those skilled in the art can understand that terms such as "first" and "second" do not limit the quantity and execution order, and terms such as "first" and "second" do not necessarily limit differences.

[0100] Second, in the embodiments of the present application, words such as "exemplarily" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design solution described as "exemplarily" or "for example" in the present application should not be construed as more preferred or more advantageous than other embodiments or design solutions. Rather, the use of words such as "exemplarily" or "for example" aims to present relevant concepts in a specific manner.

[0101] Third, in the embodiments of the present application, "at least one" means one or more, and "multiple" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the front and back associated objects are in an "or" relationship. "At least one (item)" or its similar expression refers to any combination of these items, including any combination of single item (item) or plural items (items). For example, at least one (item) of a, b, or c can represent: a, b, c, a - b, a - c, b - c, or a - b - c, where a, b, and c can be single or multiple.

[0102] Fourth, in the embodiments of the present application, descriptions such as "when...", "in the case of...", "if", and "when" all refer to the situation where the device (such as the terminal device or access network device described below) will perform corresponding processing under certain objective circumstances, not to limit time, and do not require the device (such as the terminal device or access network device described below) to have a judgment action when implemented, nor does it mean other limitations exist.

[0103] The following will describe in detail the communication method provided in the embodiments of the present application with reference to the accompanying drawings.

[0104] The method provided in this application embodiment can be applied to the communication system shown in Figure 2 above, as well as to low-frequency or high-frequency scenarios, and can also be applied to 4G, 5G, 6G or future mobile communication systems. It can also be applied to single-transmission and reception point (Single-TRP) or multi-transmission and reception point (Multi-TRP) scenarios, as well as any of their derivative scenarios.

[0105] The SRS port described above is an example of a reference signal port. The following description uses a reference signal port as an example. The method provided in this application can map different reference signal ports to different time-domain units. These time-domain units can be orthogonal frequency division multiplexing (OS) symbols, time slots, subframes, frames, or micro-time slots; this application does not limit the specific time slots used.

[0106] There is a correspondence between reference signal ports and reference signal resources. In the embodiments of this application, there can be a one-to-one correspondence between reference signal ports and reference signal resources, or a many-to-one correspondence. Reference signal resources represent resources occupied or used by the reference signal. Reference signal resources can be used to acquire downlink signal information.

[0107] The following section, with reference to Figure 3, illustrates the one-to-one correspondence between reference signal ports and reference signal resources.

[0108] For example, Figure 3 shows a schematic flowchart of a communication method provided in an embodiment of this application. This communication method can be executed by a network device and can be applied to the communication system shown in Figure 2 above.

[0109] As shown in Figure 3, the method may include the following steps:

[0110] S301. The network device configures a first reference signal resource set. The first reference signal resource set is used to obtain downlink channel information. The first reference signal resource set includes N1 reference signal resources. At least one of the N1 reference signal resources includes a reference signal port. Different reference signal ports are mapped to different time domain units. N1 is an integer greater than 1.

[0111] In one example, the network device can be network device 210 as shown in Figure 2 above.

[0112] The reference signal can be an uplink reference signal. For example, the reference signal can be an SRS. When the reference signal is an SRS, the reference signal resource can be called an SRS resource.

[0113] The first reference signal resource set includes N1 reference signal resources, where N1 is an integer greater than 1, indicating that the first reference signal resource set includes multiple reference resources. All of these multiple reference signal resources can be used to acquire downlink signal information.

[0114] At least one of the N1 reference signal resources includes a reference signal port, and there are multiple possible scenarios.

[0115] In one possible scenario, each of the N1 reference signal resources includes a reference signal port. The one-to-one correspondence between a reference resource and a reference signal port illustrates this one-to-one relationship.

[0116] For example, N1 can be 2. If each of the two reference signal resources includes a reference signal port, then there are two reference signal ports. When the reference signal is an SRS, each of the two SRS resources can include an SRS port.

[0117] In another possible scenario, among the N1 reference signal resources, there are reference signal resources that include one reference signal port, and there are also reference signal resources that include multiple reference signal ports.

[0118] At least one of the N1 reference signal resources includes a reference signal port, thus allowing for multiple reference signal ports. Different reference signal ports are mapped to different time-domain units.

[0119] For example, each of the N1 reference signal resources includes a reference signal port, resulting in N1 reference signal ports, which can be mapped to different time-domain units. When the reference signal is an SRS and the time-domain unit is an OS, each of the N1 SRS resources includes an SRS port, resulting in N1 SRS ports, which can be mapped to different OSs.

[0120] The configuration of the first set of reference signal resources by the network device can be understood as the network device determining the first set of reference signal resources. In order to obtain downlink channel information, the network device can determine to use N1 reference signal resources to obtain downlink channel information, and at least one of the N1 reference signal resources includes a reference signal port, with different reference signal ports mapped to different time domain units.

[0121] In some examples, the reference signals corresponding to the aforementioned N1 reference signal resources are beamformed or pre-coded signals. Alternatively, the number of reference signal ports included in the aforementioned N1 reference signal resources is less than the number of antennas in the terminal device.

[0122] Thus, the number of reference signal ports included in the N1 reference signal resources is less than the number of antennas in the terminal device. This means that the terminal device can transmit reference signals based on this configuration using beamforming or precoding, which helps to alleviate channel aging and improve channel estimation accuracy.

[0123] S302, The network device indicates the first set of reference signal resources.

[0124] The network device instructing the first set of reference signal resources can be understood as the network device sending the first set of reference signal resources to the terminal device. The terminal device can send reference signals to the network device based on the second set of reference signal resources. In one example, the terminal device can be the terminal device 220 shown in Figure 2 above.

[0125] The communication method provided in this application, in order to obtain downlink channel information, can configure a reference signal resource including a reference signal port and map different reference signal ports onto different time domain units. This allows different reference signals to be transmitted at different times, which helps reduce the probability of high PAPR (Packet Arrival Rate).

[0126] It should be noted that S302 described above is optional. The network device indicates a first set of reference signal resources, and the terminal device can communicate according to the configured first set of reference signal resources, which helps to reduce the probability of high PAPR.

[0127] Optionally, in the method shown in Figure 3 above, N1 reference signal resources can correspond to M1 comb offsets, where M1 is greater than or equal to 1 and less than N1.

[0128] The number of comb offsets M1 is less than the number of reference signal resources N1, and can be used to indicate that N1 reference signal resources correspond to the same comb offset.

[0129] The number of comb offsets M1 is less than the number of reference signal resources N1. These M1 comb offsets can be the same or different, or they can be both the same and different. This application does not limit this.

[0130] In one possible example, M1 comb offsets can be the same, that is, N1 reference signal resources can correspond to 1 comb offset.

[0131] For example, two reference signal resources can correspond to one comb offset.

[0132] In this way, N1 reference signal resources can correspond to 1 comb offset, meaning that N1 reference signal resources correspond to the same comb offset. When the network device instructs the terminal device, it can be indicated once, which helps to reduce the indication overhead.

[0133] In this scenario, the network device indicates to the terminal device that N1 reference signal resources can correspond to one comb offset, which can be comb offset 1. The terminal device can determine that each of the N1 reference signal resources corresponds to comb offset 1, or comb offset 2 associated with comb offset 1. The relationship between comb offset 2 and comb offset 1 can be linear or non-linear, and this embodiment does not limit this.

[0134] For example, a network device indicates to a terminal device that N1 reference signal resources can correspond to one comb offset 1, and the terminal device can determine that each of the N1 reference signal resources corresponds to the comb offset 1.

[0135] In this way, the network device explicitly instructs the terminal device on the comb offset, which is simple to implement.

[0136] For example, the network device indicates to the terminal device that N1 reference signal resources can correspond to 1 comb offset 1, and the terminal device searches for the comb offset 2 corresponding to the comb offset 1 in the correspondence.

[0137] For example, a network device indicates to a terminal device that N1 reference signal resources can correspond to one comb offset 1. The terminal device can input the comb offset 1 into the formula, and the output of the formula is the comb offset 2.

[0138] In this way, the network device does not directly indicate comb offset 2, and the terminal device needs to determine comb offset 2 based on the indicated comb offset 1, which helps to improve the security of data transmission.

[0139] In another possible example, the M1 comb offsets mentioned above can be different, or they can be both the same and different.

[0140] For example, four reference signal resources can correspond to two comb offsets, which can be different or the same.

[0141] In this scenario, the network device indicates to the terminal device that N1 reference signal resources can correspond to two comb offsets, which can be comb offset 1 and comb offset 2. The terminal device can determine that each of the N1 reference signal resources corresponds to either of the two comb offsets. Alternatively, the terminal device can calculate comb offset 3 based on comb offset 1 and comb offset 2, and determine that each of the N1 reference signal resources corresponds to comb offset 3. Comb offset 3 can be the median, mode, mean, or a value calculated based on specific rules from comb offset 1 and comb offset 2; this embodiment does not limit this.

[0142] In this way, N1 reference signal resources can correspond to multiple comb offsets, meaning that N1 reference signal resources correspond to the same comb offset, and the comb offsets corresponding to N1 reference signal resources are related to these multiple comb offsets, which makes them more flexible.

[0143] Optionally, in the method shown in Figure 3 above, N1 reference signal resources correspond to L1 cyclic shifts CS, where L1 is greater than or equal to 1 and less than N1.

[0144] The number of CSs, L1, is less than the number of reference signal resources, N1, and can be used to indicate that N1 reference signal resources correspond to the same CS.

[0145] The number of CSs, L1, is less than the number of reference signal resources, N1. These L1 CSs can be the same, different, or both the same and different; this application does not limit this.

[0146] In one possible example, L1 CSs can be the same, that is, N1 reference signal resources can correspond to 1 CS.

[0147] For example, four reference signal resources can correspond to one CS.

[0148] In this way, N1 reference signal resources can correspond to 1 CS, meaning that N1 reference signal resources correspond to the same CS. When the network device instructs the terminal device, it can be instructed only once, which helps to reduce the instruction overhead.

[0149] In this scenario, the network device indicates to the terminal device that N1 reference signal resources can correspond to one CS, where CS can be CS1. The terminal device can determine that each of the N1 reference signal resources corresponds to CS1, or to CS2 associated with CS1. The relationship between CS2 and CS1 can be linear or non-linear, and this embodiment does not limit this.

[0150] For example, a network device indicates to a terminal device that N1 reference signal resources can correspond to one CS1, and the terminal device can determine that each of the N1 reference signal resources corresponds to the CS1.

[0151] In this way, the network device explicitly instructs the client (CS) to the terminal device, which is simple to implement.

[0152] For example, a network device indicates to a terminal device that N1 reference signal resources can correspond to one CS1, and the terminal device searches for the CS2 corresponding to that CS1 in the correspondence relationship based on the CS1.

[0153] For example, a network device can indicate to a terminal device that N1 reference signal resources can correspond to one CS1. The terminal device can input the CS1 into the formula, and the output of the formula is CS2.

[0154] In this way, the network device does not directly indicate CS2, and the terminal device needs to determine CS2 based on the indicated CS1, which helps to improve the security of data transmission.

[0155] In another possible example, the L1 CSs mentioned above can be different, or they can both be the same and different.

[0156] For example, four reference signal resources can correspond to two CSs, which can be different or the same.

[0157] In this way, N1 reference signal resources can correspond to multiple CSs, meaning that N1 reference signal resources correspond to the same CS, and the CSs corresponding to N1 reference signal resources are related to these multiple CSs, which makes it more flexible.

[0158] To better understand the methods provided in the above embodiments, the present application summarizes the methods as follows.

[0159] The network device is configured with N1 reference signal resources, among which one or more reference signal resources include a reference signal port.

[0160] The mapping constraints between the N1 reference signal resources may include:

[0161] 1) N1 reference signal resources are associated, and the different reference signal ports included in the N1 reference signal resources are mapped on different time domain units.

[0162] 2) The N1 reference signal resources include reference signal ports that correspond to the same comb offset and CS.

[0163] Of these, 2) is optional.

[0164] In one example, the reference signal can be an SRS, and the time-domain unit can be an OS. If the reference signal is an SRS, the embodiments of this application can be described as follows:

[0165] The network device is configured with N1 SRS resources, among which one or more SRS resources include an SRS port.

[0166] Mapping constraints between N1 SRS resources may include:

[0167] 1) N1 SRS resources are associated, and the different SRS ports included in the N1 SRS resources are mapped on different OSes.

[0168] 2) The N1 reference signal resources include reference signal ports that correspond to the same comb offset and CS.

[0169] Of these, 2) is optional.

[0170] This application embodiment can define a new SRS usage in the existing protocol 38.214 6.2.1.2 UE sounding procedure for DL ​​CSI acquisition. Here, SRS is used for precoded SRS for downlink sounding. The new SRS usage is shown above.

[0171] The above describes the configuration of the first reference signal resource set for network devices. The following describes the timing for configuring the first reference signal resource set for network devices.

[0172] For example, prior to S301 above, the method further includes: the terminal device sending terminal device capability information to the network device; S301, the network device configuring a first reference signal resource set, including: in response to the terminal device capability information, the network device configuring a first reference signal resource set.

[0173] Terminal device capability information can be reported, including the radio frequency capabilities of the terminal device. Network devices can then determine whether to configure a first reference signal resource set based on this information.

[0174] In one example, when the terminal device capability information indicates that the terminal device's radio frequency capability may experience a high PAPR (Probability of Arrival and Probability of Reaching a High PAPR), the network device can configure a first set of reference signal resources. When the terminal device capability information indicates that the probability of the terminal device's radio frequency capability experiencing a high PAPR is low, the network device can handle the situation using existing methods.

[0175] In one example, terminal device capability information can be reported to the network device along with BandNR parameters. An AntPowerConstraint is added to the BandNR parameters to indicate the terminal device capability information.

[0176] This helps network devices determine when to configure the first set of reference signal resources.

[0177] The above describes a method for establishing a one-to-one correspondence between reference signal ports and reference signal resources. The following section, with reference to Figure 4, describes a method for establishing a many-to-one correspondence between reference signal ports and reference signal resources.

[0178] For example, Figure 4 shows a schematic flowchart of a communication method provided in an embodiment of this application. This communication method can be executed by a network device and can be applied to the communication system shown in Figure 2 above.

[0179] As shown in Figure 4, the method may include the following steps:

[0180] S401. The network device configures a second reference signal resource set. The second reference signal resource set is used to obtain downlink channel information. The second reference signal resource set includes N2 reference signal resources. At least one of the N2 reference signal resources includes P reference signal ports, where N2 is an integer greater than or equal to 1 and P is an integer greater than or equal to 2.

[0181] In one example, the network device can be network device 210 as shown in Figure 2 above.

[0182] The first set of reference signal resources differs from the second set of reference signal resources described above. In the second set of reference signal resources, the relationship between reference signal resources and reference signal ports is one-to-many.

[0183] The reference signal can be an uplink reference signal. For example, the reference signal can be an SRS. When the reference signal is an SRS, the reference signal resource can be called an SRS resource.

[0184] At least one of the N2 reference signal resources includes P reference signal ports, and there are multiple possible scenarios.

[0185] In one possible scenario, each of the N² reference signal resources includes P reference signal ports. One reference resource corresponds to P reference signal ports, illustrating a one-to-many correspondence between reference signal ports and reference signal resources.

[0186] For example, N2 can be 1, and one reference signal resource can include four reference signal ports. When the reference signal is an SRS, one SRS resource can include four SRS ports.

[0187] In another possible scenario, among the N2 reference signal resources, there are reference signal resources that include P reference signal ports, and there are also reference signal resources that include only one reference signal port.

[0188] Optionally, the number of reference signal ports included in the aforementioned N2 reference signal resources can be less than the number of antennas in the terminal device. In this way, the reference signals corresponding to the N2 reference signal resources can be beamformed or pre-coded signals, which helps alleviate channel aging and improve channel estimation accuracy.

[0189] S402. The network device is configured based on higher-level settings to map P reference signal ports to different time domain units.

[0190] P reference signal ports are mapped to different time domain units.

[0191] For example, when the reference signal is SRS and the time domain unit is OS, P SRS ports can be mapped to different OSs.

[0192] In some examples, network devices can instruct P reference signal ports to be mapped to different time-domain units via higher-level parameters.

[0193] For example, a higher-layer parameter can be an indicator. When indicator = true, it means that the P reference signal ports are mapped to different time-domain units. Network devices can set indicator = true to indicate that the P reference signal ports are mapped to different time-domain units.

[0194] S403, Network device indicates second reference signal resource set.

[0195] The network device instructing the second reference signal resource set can be understood as the network device sending the second reference signal resource set to the terminal device. The terminal device can send reference signals to the network device based on the second reference signal resource set. In one example, the terminal device can be terminal device 220 as shown in Figure 2 above. The reference signal can be a beamformed or precoded signal. In this way, the terminal device can send reference signals based on this configuration using beamforming or precoding, which helps to alleviate channel aging and improve channel estimation accuracy.

[0196] The communication method provided in this application, in order to obtain downlink channel information, can configure a reference signal resource including P reference signal ports, and map the P reference signal ports onto different time domain units. This allows different reference signals to be transmitted at different times, which helps reduce the probability of high PAPR (Packet Reduction Probability).

[0197] It should be noted that S403 described above is optional. The network device indicates a second set of reference signal resources, and the terminal device can communicate according to the configured second set of reference signal resources, which helps to reduce the probability of high PAPR.

[0198] Optionally, the P reference signal ports correspond to M2 comb offsets, where M2 is greater than or equal to 1 and less than P.

[0199] The number of comb offsets, M2, is less than the number of reference signal ports, P, and can be used to indicate that P reference signal ports correspond to the same comb offset.

[0200] The number of comb offsets M2 is less than the number of reference signal ports P. These M2 comb offsets can be the same or different, or they can be both the same and different. This application does not limit this.

[0201] For example, P reference signal ports can correspond to 1 comb offset.

[0202] For example, two reference signal ports can correspond to one comb offset.

[0203] In this way, P reference signal ports can correspond to 1 comb offset, meaning that P reference signal ports correspond to the same comb offset. When the network device instructs the terminal device, it can be indicated once, which helps to reduce the indication overhead.

[0204] In this scenario, the network device indicates to the terminal device that P reference signal ports can correspond to one comb offset, which can be comb offset 1. The terminal device can determine that each of the P reference signal ports corresponds to comb offset 1, or comb offset 2 associated with comb offset 1. The relationship between comb offset 2 and comb offset 1 can be linear or non-linear, and this embodiment does not limit this.

[0205] For example, a network device indicates to a terminal device that P reference signal ports can correspond to one comb offset of 1, and the terminal device can determine that each of the P reference signal ports corresponds to the comb offset of 1.

[0206] In this way, the network device explicitly instructs the terminal device on the comb offset, which is simple to implement.

[0207] For example, a network device indicates to a terminal device that P reference signal ports can correspond to one comb offset 1. The terminal device then searches for the corresponding comb offset 2 in the correspondence based on the comb offset 1.

[0208] For example, a network device can indicate to a terminal device that P reference signal ports can correspond to one comb offset 1. The terminal device can input the comb offset 1 into the formula, and the output of the formula is the comb offset 2.

[0209] In this way, the network device does not directly indicate comb offset 2, and the terminal device needs to determine comb offset 2 based on the indicated comb offset 1, which helps to improve the security of data transmission.

[0210] Optionally, in the method shown in Figure 4 above, P reference signal ports correspond to L2 cyclic shifts CS, where L2 is greater than or equal to 1 and less than P.

[0211] The number of CSs, L2, is less than the number of reference signal ports, P, and can be used to indicate that P reference signal ports correspond to the same CS.

[0212] The number of CSs, L2, is less than the number of reference signal ports, P. These L2 CSs can be the same, different, or both the same and different; this application does not limit this.

[0213] In one example, L2 CSs can be the same, meaning that P reference signal ports can correspond to 1 CS.

[0214] For example, four reference signal ports can correspond to one CS.

[0215] In this way, P reference signal ports can correspond to 1 CS, meaning that P reference signal ports correspond to the same CS. When the network device instructs the terminal device, it can be instructed only once, which helps to reduce instruction overhead.

[0216] In this scenario, the network device indicates to the terminal device that P reference signal ports can correspond to one CS, where CS can be CS1. The terminal device can determine that each of the P reference signal ports corresponds to CS1, or to CS2 associated with CS1. The relationship between CS2 and CS1 can be linear or non-linear, and this embodiment does not limit this.

[0217] To better understand the methods provided in the above embodiments, the present application summarizes the methods as follows.

[0218] The network device is configured with N2 reference signal resources, among which one or more reference signal resources include P reference signal ports.

[0219] When configuring P reference signal ports at a higher layer, each mapped to a different time-domain element, the network device is configured to have P reference signal ports mapped to different time-domain elements. Furthermore, the P reference signal ports can correspond to the same comb offset and CS.

[0220] In one example, the reference signal can be an SRS, and the time-domain unit can be an OS. If the reference signal is an SRS, the embodiments of this application can be described as follows:

[0221] The network device is configured with N² SRS resources, among which one or more SRS resources include P SRS ports. When the higher layer configures the P SRS ports to be mapped to different time-domain units, the network device configures the P SRS ports to be mapped to different time-domain units. Furthermore, the P SRS ports can correspond to the same comb offset and CS.

[0222] The embodiments of this application can update the existing protocol 38.211 6.4.1.4.3 physical resource mapping to the method shown in Figure 4 above.

[0223] The above describes the configuration of a second reference signal resource set for network devices. The following describes the timing for configuring a second reference signal resource set for network devices.

[0224] For example, prior to S401 above, the method further includes: the terminal device sending terminal device capability information to the network device; S301, the network device configuring a second reference signal resource set, including: in response to the terminal device capability information, the network device configuring a second reference signal resource set.

[0225] Terminal device capability information can be reported, including the radio frequency capabilities of the terminal device. Network devices can then determine whether to configure a second reference signal resource set based on this terminal device capability information.

[0226] In one example, when the terminal device capability information indicates that the terminal device's radio frequency capability is prone to PAPR (Probability of Approaching Probability of Recurrence), the network device can configure a second set of reference signal resources. When the terminal device capability information indicates that the probability of PAPR is low, the network device can handle it using existing methods.

[0227] In one example, terminal device capability information can be reported to the network device along with BandNR parameters. An AntPowerConstraint is added to the BandNR parameters to indicate the terminal device capability information.

[0228] This helps network devices determine when to configure the second set of reference signal resources.

[0229] To better understand the methods shown in Figures 3 and 4 above, the methods provided in the embodiments of this application will be described below in conjunction with specific scenarios.

[0230] For example, Figure 5 shows a schematic flowchart of a communication method provided in an embodiment of this application. This method can be applied to the communication system shown in Figure 2 above. As shown in Figure 5, the method may include the following steps:

[0231] S501, The network device sends the reference signal resource set and the number of SRS ports N to the terminal device. layer .

[0232] The reference signal resource set can be either the first reference signal resource set or the second reference signal resource set mentioned above, and this application embodiment does not limit it in this regard.

[0233] Number of SRS ports N layer The number of antennas can be less than that of the terminal device, in order to reduce channel aging and improve channel estimation accuracy.

[0234] Reference signal resource set and number of SRS ports N layer It can be sent through the same signaling or through different signaling; this application does not limit this.

[0235] S502, Network devices can send CSI-RS to terminal devices.

[0236] CSI-RS can be used as a reference signal to obtain information about the downlink channel.

[0237] S503: Terminal equipment can calculate broadband covariance information based on the downlink channel obtained by CSI-RS.

[0238] The downlink channel can be represented as N t N represents the number of antennas in a network device. r N represents the number of antennas in the terminal device. RB This indicates the number of resource blocks (RBs). This represents the channel acquired on the i-th RB, where i = 1, 2, ..., N RB .

[0239] The terminal device can calculate the covariance of the channels on each RB and then average them to obtain the broadband covariance information. The broadband covariance information can be expressed as:

[0240] As can be seen from the formula, the terminal device can be based on the downlink channel. calculate Then according to Obtain the covariance information of the broadband

[0241] S504. The terminal device performs feature decomposition on the covariance information of the broadband to obtain a set of feature vectors.

[0242] S505, the terminal device, based on the feature vector set and the number of SRS ports N, layer Calculate the SRS shaping weights.

[0243] Terminal devices can be configured based on the number of SRS ports N layer Select N from the feature vector set. layrr N feature vectors, and based on N layer 1 eigenvector, calculate SRS shaping weight.

[0244] In one example, the terminal device can sort the eigenvalues ​​of the eigenvectors in the eigenvector set and take the largest N. layer The eigenvectors corresponding to each eigenvalue Get N layer 1 eigenvector.

[0245] Terminal devices can be based on N layer The SRS shaping weights are calculated from the eigenvectors.

[0246] SRS shaping weights can be represented as:

[0247] S506, The terminal device pre-encodes the SRS based on the SRS shaping weights to obtain N. layer SRS flow.

[0248] S507, terminal equipment via N layer Each SRS port transmits N layer SRS flow.

[0249] The terminal device can determine from the aforementioned set of reference signal resources that different SRS ports are mapped to different time domain units. In this way, the terminal device can assign one SRS port to one stream of SRS, and different SRS ports can be time-division multiplexed to different time domain units for transmission.

[0250] In one example, N layer Each SRS port can correspond to N lAyer Each SRS resource can include one SRS port. layer Each SRS resource can correspond to the same comb offset and CS.

[0251] In another example, N layer Each SRS port can correspond to one SRS resource, meaning one SRS resource can include N... layer N SRS ports layer Each SRS port can correspond to the same comb offset and CS.

[0252] S508, network devices can be based on N layer Stream SRS to obtain downlink channel information.

[0253] Network devices can be based on N layer Stream SRS, the channel obtained in a single subcarrier can be

[0254] The communication method of the embodiments of this application has been described in detail above with reference to Figures 1 to 5. The communication device of the embodiments of this application is described in detail below with reference to Figures 6 and 7. The communication device includes modules or units for performing each part of the above embodiments. The modules or units can be software, hardware, or a combination of software and hardware. The following is only a brief illustrative description of the communication device. For details of the implementation, please refer to the description of the foregoing method embodiments, which will not be repeated below.

[0255] Figure 6 is a schematic block diagram of a communication device 600 provided in an embodiment of this application. As shown in Figure 6, the communication device 600 includes a processing unit 610 and an interface unit 620.

[0256] In one possible implementation, the communication device 600 is used to implement the method shown in FIG3 above.

[0257] The processing unit 610 is configured to: configure a first reference signal resource set, which is used to acquire downlink channel information. The first reference signal resource set includes N1 reference signal resources, at least one of which includes a reference signal port. Different reference signal ports are mapped to different time-domain units, and N1 is an integer greater than 1. The interface unit 620 is configured to perform receiving or transmitting steps.

[0258] In another possible implementation, the communication device 600 is used to implement the method shown in FIG4 above.

[0259] The processing unit 610 is configured to: configure a second reference signal resource set, which is used to acquire downlink channel information. The second reference signal resource set includes N2 reference signal resources, and at least one of the N2 reference signal resources includes P reference signal ports, where N2 is an integer greater than or equal to 1 and P is an integer greater than or equal to 2. The interface unit 620 is configured to: map the P reference signal ports to different time domain units based on higher-layer configuration instructions.

[0260] It should be understood that the communication device 600 here is embodied in the form of a functional module. The term "module" here can refer to application-specific integrated circuits (ASICs), electronic circuits, processors (e.g., shared processors, proprietary processors, or group processors, etc.) and memories for executing one or more software or firmware programs, integrated logic circuits, and / or other suitable components supporting the described functions. In an alternative example, those skilled in the art will understand that the communication device 600 can be specifically a network device in the above embodiments. The communication device 600 can be used to execute the various processes and / or steps corresponding to the network device in the above method embodiments; to avoid repetition, these will not be described again here.

[0261] The communication device 600 described above has the function of implementing the corresponding steps performed by the network device in the above method; the above functions can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions. In embodiments of this application, the communication device 600 in FIG6 can also be a chip, such as a System-on-a-Chip (SoC).

[0262] Figure 7 shows a schematic block diagram of a communication device 700 provided in an embodiment of this application. The communication device 700 may include a processor 710, a transceiver 720, and a memory 730. The processor 710, transceiver 720, and memory 730 communicate with each other via internal interconnection paths. The memory 730 is used to store instructions, and the processor 710 is used to execute the instructions stored in the memory 730 to control the transceiver 720 to transmit and / or receive signals.

[0263] It should be understood that the communication device 700 may specifically be a network device in the above embodiments, and may be used to execute the various steps and / or processes corresponding to the network device in the above method embodiments. Optionally, the memory 730 may include read-only memory and random access memory, and provide instructions and data to the processor. A portion of the memory may also include non-volatile random access memory. For example, the memory may also store device type information. The processor 710 may be used to execute instructions stored in the memory, and when the processor 710 executes instructions stored in the memory, the processor 710 is used to execute the various steps and / or processes of the above method embodiments. The transceiver 720 may include a transmitter and a receiver, the transmitter may be used to implement the various steps and / or processes corresponding to the transceiver for performing a transmitting action, and the receiver may be used to implement the various steps and / or processes corresponding to the transceiver for performing a receiving action.

[0264] It should be understood that, in the embodiments of this application, the processor may be a central processing unit (CPU), or it may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0265] In implementation, each step of the above method can be completed by integrated logic circuits in the processor's hardware or by instructions in software. The steps of the method disclosed in the embodiments of this application can be directly manifested as execution by a hardware processor, or as a combination of hardware and software modules within the processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory, and the processor executes the instructions in the memory, combining them with its hardware to complete the steps of the above method. To avoid repetition, detailed descriptions are omitted here.

[0266] This application also provides a computer-readable storage medium for storing a computer program that implements the methods shown in the above-described method embodiments.

[0267] This application also provides a computer program product, which includes a computer program (also referred to as code or instructions). When the computer program is run on a computer, the computer can execute the methods shown in the above-described method embodiments.

[0268] Those skilled in the art will recognize that the modules and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0269] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and modules described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0270] In the embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or modules may be electrical, mechanical, or other forms.

[0271] The modules described as separate components may or may not be physically separate. Similarly, the components shown as modules may or may not be physical modules; they may be located in one place or distributed across multiple network modules. Some or all of the modules can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0272] In addition, the functional modules in the various embodiments of this application can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module.

[0273] If a function is implemented as a software module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the embodiments of this application, or the parts that contribute to the prior art, or parts of the technical solutions, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0274] The above description is merely a specific embodiment of this application, but the protection scope of the embodiments of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the embodiments of this application should be included within the protection scope of the embodiments of this application. Therefore, the protection scope of the embodiments of this application should be determined by the protection scope of the claims.

Claims

1. A communication method, characterized in that, include: Configure a first reference signal resource set, which is used to obtain downlink channel information. The first reference signal resource set includes N1 reference signal resources, at least one of the N1 reference signal resources includes a reference signal port, and different reference signal ports are mapped to different time domain units, where N1 is an integer greater than 1.

2. The method according to claim 1, characterized in that, The N1 reference signal resources correspond to M1 comb offsets, where M1 is greater than or equal to 1 and less than N1.

3. The method according to claim 1 or 2, characterized in that, The N1 reference signal resources correspond to L1 cyclic shifters CS, where L1 is greater than or equal to 1 and less than N1.

4. The method according to any one of claims 1 to 3, characterized in that, The method further includes: Indicates the first set of reference signal resources.

5. The method according to any one of claims 1 to 4, characterized in that, The method further includes: Receive terminal device capability information; The configuration of the first reference signal resource set includes: In response to the terminal device capability information, the first reference signal resource set is configured.

6. The method according to any one of claims 1 to 5, characterized in that, The reference signals corresponding to the N1 reference signal resources are signals that have undergone beamforming or precoding.

7. The method according to any one of claims 1 to 5, characterized in that, The number of reference signal ports included in the N1 reference signal resources is less than the number of antennas in the terminal device.

8. A communication method, characterized in that, include: Configure a second reference signal resource set, which is used to obtain downlink channel information. The second reference signal resource set includes N2 reference signal resources, at least one of the N2 reference signal resources includes P reference signal ports, where N2 is an integer greater than or equal to 1 and P is an integer greater than or equal to 2. Based on the high-level configuration instructions, the P reference signal ports are mapped to different time domain units respectively.

9. The method according to claim 8, characterized in that, The P reference signal ports correspond to M2 comb offsets, where M2 is greater than or equal to 1 and less than P.

10. The method according to claim 8 or 9, characterized in that, The P reference signal ports correspond to L2 cyclic shifters CS, where L2 is greater than or equal to 1 and less than P.

11. The method according to any one of claims 8 to 10, characterized in that, The method further includes: Indicates the second set of reference signal resources.

12. The method according to any one of claims 8 to 11, characterized in that, The method further includes: Receive terminal device capability information; The configuration of the second reference signal resource set includes: In response to the terminal device capability information, the second reference signal resource set is configured.

13. The method according to any one of claims 8 to 12, characterized in that, The reference signals corresponding to the N2 reference signal resources are signals that have undergone beamforming or precoding.

14. The method according to any one of claims 8 to 12, characterized in that, The number of reference signal ports included in the N2 reference signal resources is less than the number of antennas in the terminal device.

15. A communication device, characterized in that, It includes a module for performing the method as described in any one of claims 1 to 7, or includes a module for performing the method as described in any one of claims 8 to 14.

16. A communication device, characterized in that, include: A processor coupled to a memory for storing a computer program, wherein when the processor invokes the computer program, the device performs the method of any one of claims 1 to 7, or performs the method of any one of claims 8 to 14.

17. A chip, characterized in that, include: A processor for reading instructions stored in a memory, and when the processor executes the instructions, causing the chip to implement the method of any one of claims 1 to 7, or causing the chip to implement the method of any one of claims 8 to 14.

18. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when run on a computer, causes the method of any one of claims 1 to 7 to be performed, or causes the method of any one of claims 8 to 14 to be performed.

19. A computer program product, characterized in that, The computer program product includes instructions that, when executed, cause the method of any one of claims 1 to 7 to be performed, or cause the method of any one of claims 8 to 14 to be performed.

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