Communication method, apparatus and system

Abstract

The present application relates to the technical field of communications. Disclosed are a communication method, apparatus and system, which are used for improving the measurement efficiency and measurement precision of measuring a high-frequency uplink channel on the basis of a sounding reference signal (SRS). The method comprises: acquiring a cross-frequency universal substrate, wherein the cross-frequency universal substrate is obtained on the basis of information of an uplink channel of a first frequency band between a terminal device and a network device, and array position information of an antenna panel, which corresponds to the terminal device, of the first frequency band, the cross-frequency universal substrate is used for indicating the number of equivalent array elements of the antenna panel of the first frequency band, and a sparse path cluster direction in an uplink channel of a second frequency band between the terminal device and the network device, and the first frequency band is different from the second frequency band; and on the basis of the cross-frequency universal substrate, generating a sparse uplink SRS of the second frequency band, and sending, to the network device, the sparse uplink SRS of the second frequency band in the sparse path cluster direction.

Description

Communication method, device and system

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on January 26, 2024, with application number 202410116593.1 and application name “Communication Methods, Devices and Systems”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communication technologies, and in particular to communication methods, devices, and systems. Background Art

[0003] With the increasing popularity of fifth-generation mobile communication technology (5G) networks, carrier aggregation (CA) has been proposed to support larger transmission bandwidths. This technology aggregates high-frequency and low-frequency bands to provide services to user equipment (UE). Before using CA for uplink transmission, it is necessary to measure the low-frequency and high-frequency uplink channels separately to ensure successful uplink transmission.

[0004] In the prior art, an uplink channel measurement scheme based on a sounding reference signal (SRS) has been proposed for measuring low-frequency and high-frequency uplink channels. In this measurement scheme, the UE transmits a low-frequency SRS to the base station via a low-frequency antenna port, and the UE transmits a high-frequency SRS to the base station via a high-frequency antenna port. After receiving the low-frequency and high-frequency SRS, the base station calculates the low-frequency uplink channel based on the low-frequency SRS and the high-frequency uplink channel based on the high-frequency SRS.

[0005] However, UEs typically have more antenna ports in high-frequency bands than in low-frequency bands. Since the number of antenna ports is proportional to the uplink channel measurement period, this results in a longer measurement period for high-frequency uplink channels, reducing measurement efficiency. Furthermore, a longer measurement period increases measurement latency, reducing measurement accuracy. Therefore, improving the efficiency and accuracy of SRS-based high-frequency uplink channel measurements has become a pressing issue. Summary of the Invention

[0006] The embodiments of the present application provide a communication method, apparatus, and system for improving the measurement efficiency and accuracy of high-frequency uplink channels based on SRS.

[0007] In a first aspect, a communication method is provided. The method can be executed by a terminal device, or by a component of the terminal device, such as a processor, chip, or chip system of the terminal device, or by a logic module or software that can implement all or part of the terminal device's functions. Taking the method as an example of being executed by a terminal device, the method includes: the terminal device first obtains a cross-frequency universal basis, the cross-frequency universal basis being obtained based on information about an uplink channel in a first frequency band between the terminal device and a network device and array position information of an antenna panel in the first frequency band corresponding to the terminal device, the cross-frequency universal basis being used to indicate the number of equivalent array elements of the antenna panel in the first frequency band and the direction of a sparse path cluster in an uplink channel in a second frequency band between the terminal device and the network device; then, based on the cross-frequency universal basis, a sparse uplink SRS in the second frequency band is generated, and the sparse uplink SRS in the second frequency band is sent to the network device in the sparse path cluster direction.

[0008] The first frequency band is different from the second frequency band. For example, the first frequency band is a low frequency band, and the second frequency band is a high frequency band.

[0009] In the above technical solution, since uplink channels of different frequency bands may be correlated, by coupling the uplink channel information of one frequency band with the array position information of the antenna panel corresponding to the frequency band through a cross-frequency universal basis, the direction of the sparse path cluster in the uplink channel of another frequency band can be indicated. For example, when there is a correlation between the high and low frequency channels for uplink data transmission of the terminal device, by coupling the low frequency uplink channel information with the array position information of the antenna panel corresponding to the low frequency band through a cross-frequency universal basis, the direction of the sparse path cluster in the high frequency uplink channel (i.e., the antenna port that sends the high frequency uplink SRS) can be indicated. Furthermore, since the channel measurement period is proportional to the number of antenna ports, and the number of antenna ports in the low-frequency band of the terminal device is less than the number of antenna ports in the high-frequency band, the terminal device generates a high-frequency sparse uplink SRS based on the cross-frequency universal base, and then sends the high-frequency sparse uplink SRS to the network device in the direction of the sparse path cluster, without having to send the uplink SRS in a full-port rotation manner on the antenna surface, thereby reducing the number of antenna ports for sending the uplink SRS, thereby shortening the period of measuring the high-frequency uplink channel based on the uplink SRS, and improving the measurement efficiency and accuracy of the high-frequency uplink channel.

[0010] In combination with the first aspect above, in a possible implementation method, the sparse path cluster direction in the high-frequency uplink channel is obtained based on the equivalent path cluster direction in the low-frequency uplink channel, and the equivalent path cluster direction in the low-frequency uplink channel is determined based on the information of the low-frequency uplink channel. Based on this solution, since the path cluster direction in the low-frequency uplink channel in which the terminal device successfully sends the low-frequency uplink SRS can be determined, the sparse path cluster direction that can successfully send the high-frequency sparse uplink SRS is determined. Therefore, the number of antenna ports for sending uplink SRS is reduced, thereby shortening the period for measuring the high-frequency uplink channel based on the high-frequency uplink SRS, and improving the measurement efficiency and measurement accuracy of the high-frequency uplink channel.

[0011] In combination with the first aspect above, in a possible implementation, the terminal device obtains a cross-frequency universal basis, including: the terminal device first sends a first frequency band combination configuration information to the network device, and the first frequency band combination configuration information includes cross-frequency mutual assistance capability information and array position information, wherein the cross-frequency mutual assistance capability information is used to characterize that the terminal device has a cross-frequency mutual assistance function, and the array position information is composed of the coordinate information of each array element on the antenna panel corresponding to the low and medium frequency bands of the terminal device, and then receives the cross-frequency universal basis from the network device. In this way, the terminal device can receive the cross-frequency universal basis from the network device to generate and send a high-frequency sparse uplink SRS based on the cross-frequency universal basis, shortening the period of measuring the high-frequency uplink channel according to the uplink SRS, and improving the measurement efficiency and measurement accuracy of the high-frequency uplink channel.

[0012] In combination with the first aspect above, in a possible implementation method, the above-mentioned terminal device obtains a cross-frequency universal basis, including: the terminal device first receives a low-frequency channel state information reference signal (CSI-RS) from the network device, and then determines the cross-frequency universal basis based on the low-frequency CSI-RS and array position information, where the array position information is composed of the coordinate information of each array element on the antenna panel corresponding to the low-frequency band in the terminal device. In this way, the terminal device can calculate the cross-frequency universal basis by itself to generate and send a high-frequency sparse uplink SRS based on the cross-frequency universal basis, shortening the period of measuring the high-frequency uplink channel according to the uplink SRS, and improving the measurement efficiency and measurement accuracy of the high-frequency uplink channel. In this way, after receiving the low-frequency CSI-RS from the network device, the terminal device can calculate the cross-frequency universal basis by itself in combination with the array position information, without the need for calculation in the network device, thereby saving resource consumption of the network device.

[0013] In combination with the first aspect above, in a possible implementation method, the communication method provided by the embodiment of the present application also includes: the terminal device can first send second frequency band combination configuration information to the network device, and the second frequency band combination configuration information includes cross-frequency mutual assistance capability information, and the cross-frequency mutual assistance capability information is used to characterize that the terminal device has a cross-frequency mutual assistance function, and then receive indication information from the network device, and the indication information is used to instruct the terminal device to turn on the cross-frequency mutual assistance function. In this way, when the terminal device receives the indication information, it turns on the cross-frequency mutual assistance function to calculate the cross-frequency universal basis, which can ensure the effectiveness of the subsequent measurement of the high-frequency uplink channel based on the cross-frequency universal basis.

[0014] In combination with the above-mentioned first aspect, in a possible implementation method, the above-mentioned terminal device determines the cross-frequency universal basis based on the low-frequency CSI-RS and array position information, including: the terminal device first determines the information of the low-frequency downlink channel based on the low-frequency CSI-RS, and then uses the channel reciprocity property between the low-frequency downlink channel and the low-frequency uplink channel to determine the information of the low-frequency uplink channel. Finally, combined with the array position information and the information of the low-frequency uplink channel, the cross-frequency universal basis is calculated, thereby ensuring the accuracy of the calculated cross-frequency universal basis.

[0015] In conjunction with the first aspect above, in one possible implementation, the communication method provided in an embodiment of the present application further includes: after the terminal device calculates and obtains the universal cross-frequency basis, sending the universal cross-frequency basis to the network device. This allows the network device to directly measure the high-frequency uplink channel based on the universal cross-frequency basis, thereby improving the measurement efficiency and accuracy of the high-frequency uplink channel.

[0016] In a second aspect, a communication method is provided. The method can be executed by a network device, or by a component of the network device, such as a processor, chip, or chip system of the network device, or by a logic module or software that can implement all or part of the network device functions. Taking the method as an example of being executed by a network device, the method includes: the network device first obtains a cross-frequency universal basis, which is obtained based on information about an uplink channel in a first frequency band between a terminal device and the network device and array position information of an antenna panel in the first frequency band corresponding to the terminal device, the cross-frequency universal basis being used to indicate the number of equivalent array elements of the antenna panel in the first frequency band and the direction of sparse path clusters in an uplink channel in a second frequency band between the terminal device and the network device, then receives a sparse uplink SRS in the second frequency band from the terminal device, the sparse uplink SRS in the second frequency band being generated based on the cross-frequency universal basis, and finally measures the uplink channel in the second frequency band based on the sparse uplink SRS in the second frequency band and the cross-frequency universal basis.

[0017] The first frequency band is different from the second frequency band. For example, the first frequency band is a low frequency band, and the second frequency band is a high frequency band.

[0018] In the above technical solution, since uplink channels in different frequency bands may be correlated, by coupling the uplink channel information of one frequency band with the array position information of the antenna panel corresponding to that frequency band through a cross-frequency universal basis, it is possible to indicate the direction of the sparse path cluster in the uplink channel of another frequency band. For example, when there is a correlation between the high-frequency and low-frequency channels on which a network device receives uplink data, by coupling the low-frequency uplink channel information with the array position information of the antenna panel corresponding to the low-frequency band through a cross-frequency universal basis, it is possible to indicate the direction of the sparse path cluster in the high-frequency uplink channel (i.e., the antenna port that transmits the high-frequency uplink SRS). Furthermore, since the channel measurement period is proportional to the number of antenna ports, and the number of antenna ports in the low-frequency band of the terminal device is less than the number of antenna ports in the high-frequency band, the network device receives the high-frequency sparse uplink SRS from the terminal device in the sparse path cluster direction without having to receive the uplink SRS through the full-port rotation reception on the antenna surface, thereby reducing the number of received uplink SRSs and shortening the period of measuring the high-frequency uplink channel based on the uplink SRS, thereby improving the measurement efficiency and measurement accuracy of the high-frequency uplink channel.

[0019] In combination with the above-mentioned second aspect, in a possible implementation method, the sparse path cluster direction in the above-mentioned high-frequency uplink channel is obtained based on the equivalent path cluster direction in the low-frequency uplink channel, wherein the equivalent path cluster direction in the low-frequency uplink channel is determined based on the information of the low-frequency uplink channel. Based on this solution, since the path cluster direction in the low-frequency uplink channel in which the network device successfully receives the low-frequency uplink SRS can be determined, the sparse path cluster direction that can successfully receive the high-frequency sparse uplink SRS is determined. Therefore, the number of antenna ports receiving the uplink SRS is reduced, thereby shortening the measurement period of the high-frequency uplink channel and improving the measurement efficiency and measurement accuracy of the high-frequency uplink channel.

[0020] In combination with the above-mentioned second aspect, in a possible implementation method, the above-mentioned network device obtains a cross-frequency universal basis, including: the network device first receives the first frequency band combination configuration information from the terminal device, and the first frequency band combination configuration information includes cross-frequency mutual assistance capability information and array position information, wherein the cross-frequency mutual assistance capability information is used to characterize that the terminal device has a cross-frequency mutual assistance function, and the array position information is composed of the coordinate information of each array element on the antenna panel corresponding to the low-frequency band of the terminal device, and then determines the cross-frequency universal basis based on the information of the low-frequency uplink channel and the array position information. In this way, the network device can calculate the cross-frequency universal basis by itself to measure the high-frequency uplink channel based on the cross-frequency universal basis, shortening the period of measuring the high-frequency uplink channel according to the uplink SRS, and improving the measurement efficiency and measurement accuracy of the high-frequency uplink channel.

[0021] In combination with the above-mentioned second aspect, in a possible implementation method, the communication method provided by the embodiment of the present application also includes: after the network device calculates the cross-frequency universal basis, it sends the cross-frequency universal basis to the terminal device, so that the terminal device can directly use the cross-frequency universal basis to generate and send a high-frequency sparse uplink SRS, shortening the period of measuring the high-frequency uplink channel according to the uplink SRS, and improving the measurement efficiency and measurement accuracy of the high-frequency uplink channel.

[0022] In conjunction with the second aspect above, in one possible implementation, the communication method provided in an embodiment of the present application further includes: the network device determining information about the low-frequency uplink channel based on the low-frequency uplink SRS between the terminal device and the network device. In this way, before calculating the cross-frequency universal basis, the network device first calculates the low-frequency uplink channel information using existing methods to ensure that the cross-frequency universal basis is successfully calculated.

[0023] In conjunction with the second aspect described above, in one possible implementation, the network device determines a universal cross-frequency basis based on information about the low-frequency uplink channel and array position information, including: when the correlation value between the low-frequency uplink channel and the high-frequency uplink channel corresponding to the previous measurement moment before the current measurement moment is greater than or equal to a first threshold, the network device determines the universal cross-frequency basis based on the array position information and information about the low-frequency uplink channel corresponding to the current measurement moment. In this way, the network device determines whether to calculate the universal cross-frequency basis by comparing the correlation value between the high-frequency and low-frequency uplink channels with the first threshold, thereby ensuring the validity of the high-frequency uplink channel subsequently measured based on the universal cross-frequency basis.

[0024] In conjunction with the second aspect, in one possible implementation, the network device obtaining the cross-frequency universal basis includes: the network device receiving the cross-frequency universal basis from the terminal device. In this manner, the network device can receive the cross-frequency universal basis from the terminal device and measure the high-frequency uplink channel based on the cross-frequency universal basis, thereby shortening the period for measuring the high-frequency uplink channel based on the uplink SRS and improving the measurement efficiency and accuracy of the high-frequency uplink channel.

[0025] In combination with the above-mentioned second aspect, in a possible implementation method, the communication method provided by the embodiment of the present application also includes: the network device first receives the second frequency band combination configuration information from the terminal device, and the second frequency band combination configuration information includes cross-frequency mutual assistance capability information, wherein the cross-frequency mutual assistance capability information is used to characterize that the terminal device has the cross-frequency mutual assistance function, and then sends an indication information to the terminal device, and the indication information is used to instruct the terminal device to turn on the cross-frequency mutual assistance function. In this way, after the network device learns that the terminal device has the cross-frequency mutual assistance function, it sends an indication information to the terminal device to enable the terminal device to turn on the cross-frequency mutual assistance function, thereby ensuring that the high-frequency uplink channel can be measured subsequently using cross-frequency mutual assistance.

[0026] In combination with the above-mentioned second aspect, in a possible implementation method, the communication method provided in an embodiment of the present application also includes: the network device sends a low-frequency CSI-RS to the terminal device, so that the terminal device can determine the information of the low-frequency uplink channel based on the low-frequency CSI-RS, thereby ensuring that the terminal device can successfully calculate the cross-frequency universal basis in combination with the information of the low-frequency uplink channel and the array position information.

[0027] In conjunction with the second aspect above, in one possible implementation, the network device sending indication information to the terminal device includes: when the correlation value between the low-frequency uplink channel and the high-frequency uplink channel corresponding to the measurement moment before the current measurement moment is greater than or equal to a second threshold, the network device sends the indication information to the terminal device. In this way, the network device determines whether to send the indication information by comparing the correlation value between the high-frequency and low-frequency uplink channels with the second threshold, thereby ensuring the effectiveness of the terminal device enabling the cross-frequency mutual assistance function based on the indication information.

[0028] In a third aspect, a communication device is provided for implementing the various methods described above. The communication device includes modules, units, or means corresponding to the methods described above. The modules, units, or means may be implemented in hardware, software, or by hardware executing corresponding software implementations. The hardware or software includes one or more modules or units corresponding to the functions described above.

[0029] In some possible designs, the communication device may include a processing module and a transceiver module. The transceiver module, also referred to as a transceiver unit, is configured to implement the transmitting and / or receiving functions described in any of the above aspects and any possible implementations thereof. The transceiver module may be comprised of a transceiver circuit, a transceiver, a transceiver, or a communication interface. The processing module may be configured to implement the processing functions described in any of the above aspects and any possible implementations thereof.

[0030] In some possible designs, the transceiver module includes a sending module and a receiving module, which are respectively used to implement the sending and receiving functions in any of the above aspects and any possible implementation methods.

[0031] In a fourth aspect, a communication device is provided, comprising: a processor and a memory; the memory is used to store computer instructions, and when the processor executes the instructions, the communication device executes any of the methods described above.

[0032] In a fifth aspect, a communication device is provided, comprising: a processor and a communication interface; the communication interface is used to communicate with a module outside the communication device; the processor is used to execute a computer program or instruction so that the communication device performs any of the methods described above.

[0033] In a sixth aspect, a communication device is provided, comprising: at least one processor; the processor is configured to execute a computer program or instruction stored in a memory, so that the communication device performs any of the methods described above. The memory may be coupled to the processor or may be independent of the processor.

[0034] Among them, the communication device in the above-mentioned third aspect to the above-mentioned sixth aspect can be: the terminal device in the above-mentioned first aspect or any implementation method of the first aspect, or a device including the above-mentioned terminal device, or a device included in the above-mentioned terminal device, such as a chip; the communication device in the above-mentioned third aspect to the above-mentioned sixth aspect can be: the network device in the above-mentioned second aspect or any implementation method of the second aspect, or a device including the above-mentioned network device, or a device included in the above-mentioned network device, such as a chip.

[0035] In the seventh aspect, a computer-readable storage medium is provided, which stores a computer program or instruction. When the computer program or instruction is run on a communication device, the communication device can execute any of the above aspects or any of its implementation methods.

[0036] In an eighth aspect, a computer program product comprising instructions is provided, which, when executed on a communication device, enables the communication device to execute the method of any of the above aspects or any of its implementations.

[0037] In a ninth aspect, a communication device is provided (for example, the communication device may be a chip or a chip system), which includes a processor for implementing the functions involved in any of the above aspects or any of its implementation methods.

[0038] In some possible designs, the communication device includes a memory for storing necessary program instructions and data.

[0039] In some possible designs, when the communication device is a chip system, it can be composed of a chip, or it can include a chip and other discrete devices.

[0040] It can be understood that when the communication device provided in any one of the sixth to ninth aspects is a chip, the above-mentioned sending action / function can be understood as output, and the above-mentioned receiving action / function can be understood as input.

[0041] In a tenth aspect, a communication system is provided, which includes a terminal device for executing the method described in the first aspect and a network device for executing the method described in the second aspect.

[0042] Among them, the technical effects brought about by any implementation method of the third aspect to the tenth aspect can refer to the technical effects brought about by the corresponding implementation methods of the first aspect and the second aspect, and will not be repeated here.

[0043] It should be noted that various possible implementations of any of the above aspects can be combined under the premise that the solutions are not contradictory. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] FIG1 is a diagram of an antenna deployment architecture of a terminal device provided in the related art;

[0045] FIG2 is a flow chart of a communication method provided in the related art;

[0046] FIG3 is a schematic diagram of the structure of a communication system provided in an embodiment of the present application;

[0047] FIG4 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0048] FIG5 is a flow chart of a communication method provided in an embodiment of the present application;

[0049] FIG6 is a flow chart of another communication method provided in an embodiment of the present application;

[0050] FIG7 is a judgment logic diagram of a network device provided in an embodiment of the present application;

[0051] FIG8 is a judgment logic diagram of a terminal device provided in an embodiment of the present application;

[0052] FIG9 is a flow chart of another communication method provided in an embodiment of the present application;

[0053] FIG10 is a judgment logic diagram of another network device provided in an embodiment of the present application;

[0054] FIG11 is a judgment logic diagram of another terminal device provided in an embodiment of the present application;

[0055] FIG12 is a schematic structural diagram of another communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0056] In the description of this application, unless otherwise specified, " / " indicates that the objects associated before and after are in an "or" relationship, for example, A / B can represent A or B; "and / or" in this application is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural.

[0057] In the description of this application, unless otherwise specified, "plurality" means two or more than two. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b and / or c can be represented by: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or plural.

[0058] In addition, to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first" and "second" are used to distinguish between identical or similar items with substantially the same functions and effects. Those skilled in the art will understand that the words "first" and "second" do not limit the quantity or execution order, and the words "first" and "second" do not necessarily mean different.

[0059] In the embodiments of this application, words such as "exemplarily" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplarily" or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplarily" or "for example" is intended to present the relevant concepts in a concrete manner to facilitate understanding.

[0060] It will be understood that the “embodiment” mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, throughout the specification, the various embodiments do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It will be understood that in the various embodiments of the present application, the size of the sequence number of each process does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

[0061] It is understood that some optional features in the embodiments of the present application may, in certain scenarios, be implemented independently of other features, such as the solution on which they are currently based, to solve corresponding technical problems and achieve corresponding effects. They may also be combined with other features as needed in certain scenarios. Accordingly, the devices provided in the embodiments of the present application may also implement these features or functions accordingly, which will not be described in detail here.

[0062] In this application, unless otherwise specified, the same or similar parts between the various embodiments can refer to each other. In the various embodiments of this application, unless otherwise specified and there is no logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships. The following description of the embodiments of this application does not constitute a limitation on the scope of protection of this application.

[0063] In the deployment of existing 5G networks, high-frequency spectrum bands (such as frequency range 2 (FR2) and U6G (the upper half of 6GHz, i.e., 6425-7125MHz)) are gradually being commercialized on a large scale. In the process of deploying high-frequency spectrum bands, since low-frequency bands (such as sub-6G) can provide basic coverage, such as uplink coverage, downlink obstruction caused by user mobility, or deep indoor coverage; and high-frequency bands can provide large bandwidth, providing users with an extremely high-speed transmission experience, therefore, a high- and low-frequency joint networking is usually adopted. Moreover, at the network deployment level, the solution of co-deploying high-frequency and low-frequency base stations efficiently reuses the original low-frequency site resources. At the terminal chip level, more and more products are also beginning to support high-frequency + low-frequency functions.

[0064] The combined high- and low-frequency networking approach is a successful commercial implementation of carrier aggregation (CA), a related technology. This CA technology aggregates high- and low-frequency signals to provide services to terminal devices, supporting greater transmission bandwidth. In CA, a single UE can be served by multiple cells, including a primary cell (PCell) and one or more secondary cells (SCells). Generally speaking, the primary cell is carried on a low-frequency carrier, while the secondary cells are carried on a high-frequency carrier.

[0065] The purpose of co-locating high- and low-frequency base stations is to adapt to the evolving needs of future communication network service scenarios. Considering the explosive growth of emerging downstream applications such as artificial intelligence generative content (AIGC) and extended reality (XR), these applications are not only unlocking traffic dividends but also driving generational throughput and experience requirements, resulting in service bandwidths of 100Gbps and even 1Tbps. Therefore, the design of the air interface architecture must also evolve accordingly. One technical direction is to increase antenna size, enable spatial division multiplexing (SM), and use more advanced beamforming technology to increase the number of transmission streams.

[0066] For example, as shown in Figure 1, a typical number of antennas for existing terminal devices in low-frequency bands (such as the sub-6GHz band) is 4, and a typical number of antennas for high-frequency bands (such as the U6GHz band) is 16. The higher-frequency FR2 band requires even more antennas. Therefore, the greater the number and scale of antennas, the greater the number of transmission streams. In response to the technical change to larger-scale antenna architectures in high-frequency bands, uplink channel measurement technology also needs to evolve adaptively.

[0067] In related technologies, an uplink channel measurement technique based on SRS has been proposed. SRS is primarily used to estimate the uplink channel quality between the UE and the base station. Specifically, since the SRS is a reference sequence known to both the transmitter (UE) and the receiver (base station), and the SRS signal amplitude and phase change after transmission through the wireless channel, the receiver compares the received sequence affected by channel interference with the known reference sequence to estimate the current channel conditions, which can be used for UE uplink scheduling, uplink timing advance (TA), or uplink beam management.

[0068] It should be noted that the SRS-related information needs to be configured and indicated to the UE by the base station through radio resource control (RRC). For example, the base station can indicate the time domain characteristics of the SRS (such as periodic, aperiodic, and semi-static). Among them, periodic SRS means that the UE sends SRS according to the period indicated by the base station; aperiodic SRS means that after the UE receives the configuration indicated by the base station, it needs downlink control information (DCI) to trigger the SRS transmission; semi-static SRS means that after receiving the period indicated by the base station, the UE needs to activate an additional medium access control (MAC) control element (CE) to periodically transmit the SRS.

[0069] As shown in Figure 2, it is a schematic diagram of an uplink channel measurement method based on SRS in the related art. In an environment where high and low frequencies are deployed simultaneously, the base station first sends RRC signaling to the UE to indicate the configuration information of SRS (such as but not limited to the time domain characteristics of SRS). Then, the UE configures SRS according to the RRC signaling. Send SRS to the base station in the primary cell (low frequency) at the same time Low ;exist Send SRS to the base station in the secondary cell (high frequency) at the same time High Finally, the base station receives Estimated Low-frequency uplink channel at time Base station receives Estimated High-frequency uplink channel at time

[0070] Among them, the subscript Low Indicates that SRS is transmitted on the low-frequency uplink channel. High Indicates that SRS is transmitted on the high frequency uplink channel, for each index i=0,1,…,n; In addition, and They can be equal or unequal, and the SRS transmission on the low-frequency channel and the high-frequency channel can be periodic, non-periodic, or semi-static.

[0071] However, SRS measurement time depends on many factors, one of which is the number of UE antenna ports. When the number of UE antenna ports increases significantly, the SRS measurement period will also increase proportionally, thereby increasing the channel measurement latency. For example, if a UE's U6G high-band is deployed with 16 antenna elements and its sub-6G low-band is deployed with 4 antenna elements, the time required to perform a single round of SRS measurements in the high-band is four times that of the low-band. Therefore, when terminal devices are deployed with a large number of high-band antenna ports, uplink channel measurement efficiency will be relatively slow. Furthermore, the increased channel measurement period will cause aging of the data measured by the base station and reduce channel measurement accuracy. Therefore, when terminal devices are deployed with a large number of high-band antenna ports, new technologies are needed to improve SRS measurement efficiency and accuracy in this new business model.

[0072] In order to improve the measurement efficiency and measurement accuracy of high-frequency uplink channels based on SRS, the embodiments of the present application provide relevant communication methods, devices and systems. The implementation methods of the embodiments of the present application are described in detail below in conjunction with the drawings in the specification.

[0073] In order to facilitate understanding of the embodiments of the present application, the following explanations are made before introducing the embodiments of the present application.

[0074] 1. In the embodiment of the present application, "indication" may include direct indication and indirect indication, and may also include explicit indication and implicit indication. The information indicated by a certain information (such as the indication information below) is called information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated, such as but not limited to, the information to be indicated can be directly indicated, such as the information to be indicated itself or the index of the information to be indicated. The information to be indicated can also be indirectly indicated by indicating other information, wherein the other information and the information to be indicated have an association relationship. It is also possible to indicate only a part of the information to be indicated, while the other parts of the information to be indicated are known or agreed in advance. For example, the indication of specific information can be achieved by means of the arrangement order of each piece of information agreed in advance (such as specified in the protocol), thereby reducing the indication overhead to a certain extent. At the same time, the common parts of each piece of information can also be identified and indicated uniformly to reduce the indication overhead caused by indicating the same information separately.

[0075] In addition, the specific indication method can also be various existing indication methods, such as but not limited to the above-mentioned indication methods and various combinations thereof. The specific details of the various indication methods can be referred to the prior art and will not be repeated herein. As can be seen from the above, for example, when it is necessary to indicate multiple information of the same type, there may be a situation where the indication methods for different information are different. In the specific implementation process, the required indication method can be selected according to specific needs. The embodiment of the present application does not limit the selected indication method. In this way, the indication method involved in the embodiment of the present application should be understood to cover various methods that can enable the party to be indicated to obtain the information to be indicated.

[0076] It should be understood that the information to be indicated can be sent as a whole, or divided into multiple sub-information and sent separately, and the sending period and / or sending time of these sub-information can be the same or different. The specific sending method is not limited in the embodiments of this application. Among them, the sending period and / or sending time of these sub-information can be predefined, for example, predefined according to a protocol, or can be configured by the transmitting device by sending configuration information to the receiving device. Among them, the configuration information can, for example, but not limited to, include radio resource control signaling, such as RRC signaling, MAC layer signaling, physical layer signaling, or one or a combination of at least two of DCI.

[0077] 2. In the embodiments of the present application, descriptions such as "when...", "in the case of...", "if" and "if" all mean that the device (such as a terminal device or a network device) will perform corresponding processing under certain objective circumstances. It does not limit the time, nor does it require the device (such as a terminal device or a network device) to perform a judgment action during implementation, nor does it mean that there are other limitations.

[0078] The embodiments of the present application can be applied to long term evolution (LTE) systems or NR systems (also referred to as 5G systems), V2X systems, LTE and NR hybrid networking systems, or device-to-device (D2D) systems, machine-to-machine (M2M) communication systems, Internet of Things (IoT) systems (such as narrowband Internet of Things (NB-IoT) systems), and other next-generation communication systems (such as 6G systems). Alternatively, the communication system may also be a non-3rd Generation Partnership Project (3GPP) communication system without limitation.

[0079] In addition, the communication architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Ordinary technicians in this field can know that with the evolution of the communication architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0080] Figure 3 is a schematic diagram of the structure of a communication system provided in an embodiment of the present application. Figure 3 illustrates the communication system 300 as an example, including a network device 310 and a terminal device 320. Air interface resources can be used for uplink and downlink transmission between the network device 310 and the terminal device 320. Optionally, the air interface resources can include at least one of time domain resources, frequency domain resources, code resources, and space resources.

[0081] It should be noted that the system diagram shown in FIG3 illustrates a communication system including one network device and one terminal device. Of course, the communication system may include a greater number of network devices and terminal devices. Furthermore, wireless communication between devices may include: wireless communication between a network device and a terminal device, wireless communication between network devices, and wireless communication between terminal devices. This embodiment of the present application does not specifically limit this.

[0082] In addition, the "wireless communication" in the embodiments of the present application can also be referred to as "communication", and "communication" can also be described as "data transmission", "information transmission" or "transmission", and the embodiments of the present application do not make specific limitations on this.

[0083] Optionally, the network device in the embodiment of the present application may also be referred to as an access network node, a radio access network (RAN) node, a RAN entity or an access node, etc., which is located on the network side of the above-mentioned communication system to help the terminal device achieve wireless access, and has a device with wireless transceiver function or a chip or chip system that can be set in the device. The network device includes but is not limited to: a base station (BS), an evolved NodeB (eNodeB), an access point (AP), a transmission reception point (TRP or transmission point, TP), a next-generation base station (gNB), a next-generation base station in a 6G mobile communication system, a base station in a future mobile communication system, or an access node in a Wi-Fi system, etc. The network device may be a macro base station, a micro base station or an indoor station, a relay node or a donor node, an open radio access network (ORAN) or a wireless controller in a centralized radio access network (CRAN) scenario. The network device may also be one or a group of antenna panels (including multiple antenna panels) of a base station in 5G, or a network node constituting a gNB, TRP or TP or transmission measurement function (TMF), such as a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), a road side unit (RSU) with base station functions. Optionally, the network device may also be a server, a wearable device, a vehicle or an on-board device, etc. For example, the network device in V2X technology may be an RSU. All or part of the functions of the network device in this application may also be implemented by software functions running on hardware, or by virtualization functions instantiated on a platform (such as a cloud platform). The network device in this application may also be a logical node, a logical module or software that can implement all or part of the functions of the network device.

[0084] Among them, the CU and DU can be set separately, or can also be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, for example, a remote radio unit (RRU), an active antenna unit (AAU) or a remote radio head (RRH). It can be understood that the network device can be a CU node, a DU node, or a device including a CU node and a DU node. In addition, the CU can be divided into a network device in the access network RAN, or the CU can be divided into a network device in the CN, which is not limited here.

[0085] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, CU may also be called O-CU (Open CU), DU may also be called O-DU, CU-CP may also be called O-CU-CP, CU-UP may also be called O-CU-UP, and RU may also be called O-RU. For the convenience of description, this application uses CU, CU-CP, CU-UP, DU and RU as examples for description. Any unit of CU (or CU-CP, CU-UP), DU and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0086] The embodiments of the present application do not limit the form of the network device. The device used to implement the function of the network device can be a network device; it can also be a device that can support the network device to implement the function, such as a chip system. The device can be installed in the network device or used in conjunction with the network device.

[0087] Optionally, the base station in the embodiment of the present application may include various forms of base stations, such as: macro base stations, micro base stations (also called small stations), relay stations, access points, home base stations, TRPs, transmitting points (TPs), mobile switching centers, etc., and the embodiments of the present application do not make specific limitations on this.

[0088] Optionally, the terminal device involved in the present application may also be referred to as a terminal, which may be a device with wireless transceiver capabilities, which may be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; it may also be deployed on the water surface (such as a ship, etc.); it may also be deployed in the air (for example, on an airplane, a balloon, and a satellite, etc.). The terminal device may be a UE, wherein the UE includes a handheld device, a vehicle-mounted device, a wearable device, or a computing device with wireless communication capabilities. Exemplarily, the UE may be a mobile phone, a tablet computer, or a computer with wireless transceiver capabilities. The terminal device may also be a VR (virtual reality) terminal device, an AR (augmented reality) terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, a wireless terminal in a smart grid, a wireless terminal in a smart city, a wireless terminal in a smart home, and the like.

[0089] In the embodiments of the present application, there is no limitation on the form of the terminal device. The device for realizing the function of the terminal device may be the terminal device; or it may be a device that can support the terminal device to realize the function, such as a chip system, which may be installed in the terminal device or used in combination with the terminal device.

[0090] In one possible implementation, the network device and terminal device in the embodiment of the present application may also be referred to as a communication device, which may be a general device or a dedicated device, and the embodiment of the present application does not specifically limit this.

[0091] In one possible implementation, the relevant functions of the terminal device or network device in the embodiments of the present application can be implemented by a single device, or by multiple devices, or by one or more functional modules within a single device, and the embodiments of the present application do not specifically limit this. It is understood that the above functions can be network elements in hardware devices, software functions running on dedicated hardware, a combination of hardware and software, or virtualized functions instantiated on a platform (e.g., a cloud platform).

[0092] In specific implementation, the network device and terminal device shown in Figure 3 can both adopt the composition structure shown in Figure 4, or include the components shown in Figure 4. Figure 4 is a schematic diagram of the composition of a communication device 400 provided in an embodiment of the present application, and the communication device 400 includes one or more processors 411. The processor 411 can be a general-purpose processor or a dedicated processor, etc. For example, it can be a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control communication devices (such as network devices, terminal devices, or chips, etc.), execute software programs, and process data of software programs.

[0093] Optionally, in one design, the processor 411 may include a program 413 (sometimes also referred to as code or instructions), and the program 413 may be executed on the processor 411 so that the communication device 400 performs the method described in the following embodiments.

[0094] Optionally, the communication device 400 may include one or more memories 412 on which a program 414 (sometimes also referred to as code or instructions) is stored. The program 414 can be run on the processor 411, so that the communication device 400 performs the method described in the following method embodiment.

[0095] Optionally, the processor 411 and / or the memory 412 may include artificial intelligence (AI) modules 417 and 418, which are used to implement AI-related functions. The AI ​​module may be implemented through software, hardware, or a combination of software and hardware. For example, the AI ​​module may include a RAN intelligent controller (RIC) module. For example, the AI ​​module may be a near real-time RIC or a non-real-time RIC.

[0096] Optionally, data may be stored in the processor 411 and / or the memory 412. The processor and the memory may be provided separately or integrated together.

[0097] Optionally, the communication device 400 may further include a transceiver 415 and / or an antenna 416. The processor 411 may also be referred to as a processing unit, which controls the communication device (e.g., a network device or a terminal device). The transceiver 415 may also be referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, and is configured to implement the transceiver function of the communication device via the antenna 416.

[0098] Optionally, in the embodiment of the present application, the processor 411 is a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The processor 411 may also be other devices with processing functions, such as circuits, devices, or software modules, without limitation.

[0099] Optionally, in an embodiment of the present application, the memory 412 may be a read-only memory (ROM) or other types of static storage devices that can store static information and / or instructions, or a random access memory (RAM) or other types of dynamic storage devices that can store information and / or instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, etc., without limitation.

[0100] Although not shown, as an optional implementation, the communication device 400 further includes an output device and an input device. For example, the input device is a keyboard, a mouse, a microphone, or a joystick, and the output device is a display screen, a speaker, or the like.

[0101] It should be noted that the communication device 400 may be a desktop computer, a portable computer, a network server, a mobile phone, a tablet computer, a wireless terminal, an embedded device, a chip system, or a device having a structure similar to that shown in FIG4 . Furthermore, the structure shown in FIG4 does not limit the communication device. In addition to the components shown in FIG4 , the communication device may include more or fewer components than shown, or combine certain components, or arrange the components differently.

[0102] In the embodiment of the present application, the chip system can be composed of chips, or can include chips and other discrete devices.

[0103] In addition, the actions and terms involved in the various embodiments of this application can refer to each other without limitation. The message names or parameter names in the messages exchanged between the various devices in the embodiments of this application are only examples, and other names can also be used in specific implementations without limitation.

[0104] The communication method provided in the embodiment of the present application is described below in combination with Figures 3 and 4 and with reference to Figures 5 to 11 below.

[0105] It should be noted that in the following embodiments of the present application, the message names, parameter names, or information names between network elements are only examples. In other embodiments, they may also be other names. The communication method provided in this application does not make specific limitations on this.

[0106] It is understood that in the embodiments of the present application, each network element may perform some or all of the steps in the embodiments of the present application. These steps or operations are merely examples, and the embodiments of the present application may also perform other operations or variations of various operations. In addition, the steps may be performed in a different order than those presented in the embodiments of the present application, and it is possible that not all operations in the embodiments of the present application need to be performed.

[0107] Figure 5 is a schematic diagram of a communication method provided in an embodiment of the present application. This method is illustrated using the interaction between a terminal device and a network device as an example. Of course, the entity executing the terminal device actions in this method may also be a device / module within the terminal device; and the entity executing the network device actions in this method may also be a device / module within the network device. This embodiment of the present application does not specifically limit this.

[0108] It should be further explained that the communication method provided in the embodiment of the present application is described below by taking the first frequency band as a low frequency band and the second frequency band as a high frequency band as an example, and will not be repeated below.

[0109] For example, as shown in FIG5 , the communication method provided in the embodiment of the present application includes:

[0110] S501: The terminal device obtains a cross-frequency universal base.

[0111] Among them, the cross-frequency universal basis is obtained based on the information of the low-frequency uplink channel between the terminal device and the network device and the array position information of the antenna panel of the low-frequency band corresponding to the terminal device. The cross-frequency universal basis is used to indicate the number of equivalent array elements of the antenna panel of the low-frequency band and the direction of the sparse path cluster in the high-frequency uplink channel between the terminal device and the network device.

[0112] In an embodiment of the present application, the sparse path cluster direction in the high-frequency uplink channel is obtained based on the equivalent path cluster direction in the low-frequency uplink channel, and the equivalent path cluster direction in the low-frequency uplink channel is determined based on information of the low-frequency uplink channel.

[0113] For example, the cross-frequency universal basis can be obtained by [L, K, (θ1, ..., θ K )] is characterized. Where L is the number of equivalent array elements of the terminal device, L is a positive integer; K is the number of equivalent channel path clusters between the network device and the terminal device, K is a positive integer; (θ1,…,θ K ) is the incident angle of the 1st to Kth equivalent channel path cluster between the network device and the terminal device. The incident angle can be represented by a quantized angle (such as floating point data "3.0") or a bitmap angle grid (such as Boolean data "0100"). K ) can indicate the direction of sparse path clusters in the high-frequency uplink channel between the terminal device and the network device.

[0114] In the embodiments of this application, the purpose of introducing a cross-frequency universal base is to decouple information such as the actual antenna panel array element arrangement corresponding to the terminal device, the frequency band used for communication between the terminal device and the network device, and the channel path clusters between the terminal device and the network device, thereby constructing a virtual array equivalent steering vector. Specifically, the equivalent array elements are virtual array elements corresponding to the array elements on the actual antenna panel of the terminal device, and the equivalent channel path clusters are virtual channel path clusters corresponding to the actual channel path clusters in the terminal device.

[0115] In an optional implementation, the terminal device may obtain the cross-frequency universal substrate from the network device.

[0116] In another optional implementation, the terminal device can calculate the cross-frequency universal basis by itself.

[0117] S502: The terminal device generates a high-frequency sparse uplink SRS according to a cross-frequency universal basis.

[0118] In an embodiment of the present application, since the cross-frequency universal base includes the equivalent number of array elements of the antenna panel of each frequency band, the number of equivalent channel path clusters between the network device and the terminal device, and the incident angle of each equivalent channel path cluster between the network device and the terminal device, after the terminal device obtains the cross-frequency universal base, it can determine the direction of the sparse path cluster in the high-frequency uplink channel required to send the high-frequency uplink SRS, and generate the high-frequency sparse uplink SRS in the direction of the sparse path cluster.

[0119] S503: The terminal device sends a high-frequency sparse uplink SRS to the network device in the sparse path cluster direction. Correspondingly, the network device receives the high-frequency sparse uplink SRS from the terminal device.

[0120] In an embodiment of the present application, since the cross-frequency universal basis can indicate the sparse path cluster direction in the high-frequency uplink channel between the terminal device and the network device, after obtaining the cross-frequency universal basis, the terminal device can send high-frequency sparse uplink SRS only in the sparse path cluster direction.

[0121] S504: The network device obtains a cross-frequency universal base.

[0122] It should be noted that, for the description of the cross-frequency universal base, reference may be made to the above step S501 , which will not be repeated here.

[0123] In an optional implementation, the network device may calculate the cross-frequency universal basis by itself.

[0124] In another optional implementation, the network device may obtain the cross-frequency universal substrate from the terminal device.

[0125] S505: The network device measures the high-frequency uplink channel according to the high-frequency sparse uplink SRS and the cross-frequency universal basis.

[0126] In an embodiment of the present application, after receiving a high-frequency sparse uplink SRS, the network device can compare the high-frequency sparse uplink SRS with a known reference SRS, and then estimate the current high-frequency uplink channel by combining it with a cross-frequency universal basis.

[0127] In the above technical solution, since there is a correlation between the high-frequency and low-frequency channels of the uplink transmission data of the terminal device, the information of the low-frequency uplink channel and the array position information of the antenna panel corresponding to the low-frequency band are coupled through a cross-frequency universal basis, so that the sparse path cluster direction in the high-frequency uplink channel (that is, the antenna port for sending the high-frequency uplink SRS) can be indicated. Furthermore, since the channel measurement period is proportional to the number of antenna ports, and the number of antenna ports in the low-frequency band of the terminal device is less than the number of antenna ports in the high-frequency band, after the terminal device generates a high-frequency sparse uplink SRS based on the cross-frequency universal basis, it sends the high-frequency sparse uplink SRS to the network device in the sparse path cluster direction, without having to send the uplink SRS in a full-port rotation manner on the antenna surface, thereby reducing the number of antenna ports for sending the uplink SRS, thereby shortening the period for measuring the high-frequency uplink channel based on the uplink SRS, and improving the measurement efficiency and measurement accuracy of the high-frequency uplink channel.

[0128] As described in S501 and S504, in an optional implementation, when the network device itself calculates the universal inter-frequency basis, the terminal device can obtain the universal inter-frequency basis from the network device. The following, combined with the embodiment shown in FIG6 , provides a solution for a terminal device to obtain the universal inter-frequency basis from the network device when the network device itself calculates the universal inter-frequency basis.

[0129] As shown in FIG6 , the communication method provided in the embodiment of the present application includes the following steps:

[0130] S601: A terminal device sends first frequency band combination configuration information to a network device. Correspondingly, the network device receives the first frequency band combination configuration information from the terminal device.

[0131] In the embodiment of the present application, the first frequency band combination configuration information includes cross-frequency mutual assistance capability information and array position information.

[0132] Among them, the cross-frequency mutual assistance capability information is used to indicate that the terminal device has the cross-frequency mutual assistance function, and the terminal device can perform channel measurement based on the cross-frequency mutual assistance function.

[0133] For example, when the terminal device initially accesses a cell, it may add cross-frequency mutual assistance capability information and array position information to the band combination (Band Combination) configuration reported to the network device to obtain first band combination configuration information.

[0134] It should be noted that the above-mentioned initial access cell refers to: the first time the terminal device accesses the network after being started, or the terminal device switches from the current serving cell to another cell.

[0135] In one possible implementation, a new inter-band assistance field may be added to the BandCombination configuration. The field length is 1 bit. If the value of this field is "1", it indicates that the terminal device has the inter-band assistance function.

[0136] The array position information consists of the coordinates of each element on the antenna panel corresponding to the low-frequency band of the terminal device. For example, the terminal device is equipped with antenna panels with different frequency bands (such as two frequency bands: low-frequency band and high-frequency band) for signal reception and transmission. Each antenna panel is equipped with an antenna array consisting of several elements.

[0137] In a possible implementation, the coordinate information of each array element may be represented by spherical polar coordinates or three-dimensional rectangular coordinates.

[0138] In one example, the coordinate information of each antenna array element is represented by a spherical polar coordinate system. A spherical polar coordinate system is established with a certain position of the terminal device as the origin, and the coordinate information of the i-th antenna array element can be (r i ,θ i ,φ i ), where r is the distance between the antenna element and the origin, θ is the elevation angle of the antenna element, and φ is the azimuth angle of the antenna element.

[0139] Exemplarily, one or more fields in the antenna radius list field, antenna angle 1 list field, or antenna angle 2 list field can be added to the BandCombination configuration. The field length of each field represents the number of antenna array elements of the terminal device, and each element in the field (antenna radius, antenna angle1, antenna angle2) respectively represents the distance, elevation angle, and azimuth angle of the antenna array element relative to the origin in the spherical polar coordinate system.

[0140] In another example, the coordinate information of each antenna array element is represented by a three-dimensional rectangular coordinate system. A three-dimensional rectangular coordinate system is established with a certain position of the terminal device as the origin, and the coordinate information of the i-th antenna array element can be (x i ,y i ,z i ), where x, y, and z are the coordinates of the antenna element on the x-axis, y-axis, and z-axis, respectively.

[0141] Exemplarily, one or more fields in the antenna coordinate x list (antenna coordinate X list) field, the antenna coordinate y list (antenna coordinate Y list) field, or the antenna coordinate z list (antenna coordinate Z list) field can be added to the BandCombination configuration, where the field length of each field represents the number of antenna array elements of the terminal device, and each element in the field (antenna coordinate X, antenna coordinate Y, antenna coordinate Z) respectively represents the x-axis coordinate, y-axis coordinate, and z-axis coordinate of the antenna array element in the three-dimensional rectangular coordinate system.

[0142] S602: The network device determines information of a low-frequency uplink channel according to a low-frequency uplink SRS between the terminal device and the network device.

[0143] In an embodiment of the present application, the terminal device needs to first send a low-frequency uplink SRS to the network device in the low-frequency uplink channel, so that after the network device receives the low-frequency uplink SRS, it can estimate the current low-frequency uplink channel information (such as the low-frequency uplink channel matrix) based on the low-frequency uplink SRS.

[0144] S603: The network device determines a cross-frequency universal basis according to the information of the low-frequency uplink channel and the array position information.

[0145] In an embodiment of the present application, after the network device learns that the terminal device has the cross-frequency mutual assistance function based on the cross-frequency mutual assistance capability information and learns the information of the low-frequency uplink channel, it can combine the information of the low-frequency uplink channel (such as the low-frequency uplink channel matrix) and the array position information received from the terminal device, and use a specific algorithm to calculate the cross-frequency universal basis.

[0146] It should be noted that, for a detailed introduction to the cross-frequency universal base, reference may be made to the relevant description of the cross-frequency universal base in S501 above, which will not be repeated here.

[0147] Optionally, in the embodiment of the present application, in order to ensure normal uplink communication between the terminal device and the network device, the network device needs to measure the information of the low-frequency uplink channel and the high-frequency uplink channel, and select the channel measurement method used for the next channel estimation based on the correlation between the low-frequency uplink channel and the high-frequency uplink channel. The information of the low-frequency uplink channel can be measured using H Low The matrix form of Low Indicates low frequency; the information of high frequency uplink channel can be expressed as H High The matrix form of High Indicates high frequency.

[0148] In one possible implementation, when the correlation value between the low-frequency uplink channel and the high-frequency uplink channel is greater than or equal to a first threshold, the cross-frequency universal base proposed in the embodiment of the present application is used to measure the high-frequency uplink channel, otherwise the channel measurement method in the related technology continues to be used to measure the high-frequency uplink channel. In this way, it is ensured that the relevant information of the low-frequency uplink channel can be effectively utilized to assist in measuring the high-frequency uplink channel under the premise that the correlation between the high and low frequency channels is significant, and it is also ensured that under the condition that the correlation between the high and low frequency channels is not significant, it falls back to the related technology to ensure that the high-frequency uplink channel measurement is successful. In other words, optionally, in an embodiment of the present application, the network device can determine the cross-frequency universal base based on the array position information and the information of the low-frequency uplink channel corresponding to the current measurement moment when the correlation value between the low-frequency uplink channel and the high-frequency uplink channel corresponding to the previous measurement moment of the current measurement moment is greater than or equal to the first threshold.

[0149] Optionally, the first threshold value may be a manually set value, which may be flexibly adjusted according to actual scenarios. For example, the first threshold value may be 5.

[0150] The following is an example of a network device determining whether the correlation value between the low-frequency uplink channel and the high-frequency uplink channel corresponding to the previous measurement time before the current measurement time is greater than or equal to the first threshold. The moment when the terminal device sends the low-frequency uplink SRS to the network device. Take the moment when the terminal device sends a high-frequency uplink SRS to the network device as an example. Assume that the moment when the terminal device sends a low-frequency uplink SRS to the network device corresponding to the previous measurement moment is At this moment, the terminal device sends the high-frequency uplink SRS to the network device. At this moment, the terminal device sends the uplink of the low-frequency channel to the network device. and uplink of high-frequency channels Network equipment according to the uplink and Up Estimate the low-frequency uplink channel and high-frequency uplink channel corresponding to the last measurement moment respectively, and update H Low and H High . Further, the network device is updated according to the H Low and H High Calculate H Low and H High and determining whether the correlation value is greater than or equal to a first threshold.

[0151] Optionally, in the embodiment of the present application, M and N are positive integers, and for any subscript p (0≤p≤M, 0≤p≤N), when the base station adopts RRC configuration, and They may be equal or unequal, and this embodiment of the present application does not impose any specific limitation on this.

[0152] It should be noted that in the embodiment of the present application, the low-frequency uplink channel corresponding to the last measurement moment refers to the low-frequency uplink channel measured by the network device last time; similarly, the high-frequency uplink channel corresponding to the last measurement moment refers to the high-frequency uplink channel measured by the network device last time. This is explained uniformly here and will not be repeated below.

[0153] For example, as shown in FIG7 , it is a judgment logic diagram of a network device. After the network device obtains the low-frequency uplink channel and the high-frequency uplink channel at the last measurement moment according to the existing technology, it calculates the correlation value of the low-frequency uplink channel and the high-frequency uplink channel according to the correlation calculation function: Cov(·): Cov(H Low ,H High ), and determine the correlation value: Cov(H Low ,H High ) is greater than or equal to a first threshold: threshold. If so, the network device uses the communication method provided in the embodiment of the present application to measure the high-frequency uplink channel at the current measurement moment and starts calculating the cross-frequency universal basis; if not, the network device uses the communication method provided in the prior art to measure the high-frequency uplink channel at the current measurement moment and starts receiving the high-frequency uplink SRS from the terminal device.

[0154] For example, take the first threshold value as 5. If the Cov(H Low ,H High )=8, it indicates that the correlation between the low-frequency uplink channel and the high-frequency uplink channel is significant. At this time, the network device can use the cross-frequency universal basis proposed in the embodiment of the present application to measure the high-frequency uplink channel; if the above Cov(H Low ,H High )=3, it indicates that the correlation between the low-frequency uplink channel and the high-frequency uplink channel is not significant. At this time, the network device continues to use the channel measurement method in the related art to measure the high-frequency uplink channel.

[0155] Furthermore, the terminal device determines whether to use the method provided in the embodiment of the present application to measure the high-frequency uplink channel at the current measurement moment by judging whether it has received the cross-frequency universal base from the network device; or, to use the method provided by the prior art to measure the high-frequency uplink channel at the current measurement moment.

[0156] For example, as shown in FIG8 , which is a judgment logic diagram of a terminal device, the terminal device determines whether it has received a cross-frequency universal basis from a network device. If so, the terminal uses the communication method provided in an embodiment of the present application to measure the high-frequency uplink channel at the current measurement moment and begins to determine a high-frequency sparse uplink SRS based on the cross-frequency universal basis. If not, the terminal device uses the communication method provided in the prior art to measure the high-frequency uplink channel at the current measurement moment and begins to send a high-frequency uplink SRS to the network device.

[0157] Optionally, in order to ensure the effectiveness of each measurement of the high-frequency uplink channel, the network device needs to calculate the correlation value between the last measured low-frequency uplink channel and the high-frequency uplink channel before each measurement of the high-frequency uplink channel, and determine the size of the correlation value and the first threshold.

[0158] S604: The network device sends the inter-frequency universal base to the terminal device. Correspondingly, the terminal device receives the inter-frequency universal base from the network device.

[0159] The cross-frequency universal basis is used to determine the high-frequency sparse uplink SRS.

[0160] In an embodiment of the present application, after calculating and obtaining the cross-frequency universal basis, the network device needs to send the cross-frequency universal basis to the terminal device so that the terminal device can generate a high-frequency sparse uplink SRS based on the cross-frequency universal basis.

[0161] It is understandable that after receiving the cross-frequency universal base, the terminal device knows that the high-frequency uplink channel will be measured using a cross-frequency mutual assistance method at the current measurement moment.

[0162] Furthermore, as shown in FIG6 , after the terminal device receives the cross-frequency universal base from the network device, the terminal device may execute the above S502 and S503 , and the network device may execute the above S505 , which will not be described in detail here.

[0163] In the above technical solution, on the one hand, after learning that the terminal device has the cross-frequency mutual assistance function, the network device first calculates the correlation value of the low-frequency uplink channel and the high-frequency uplink channel corresponding to the previous measurement moment. When the correlation value is greater than or equal to the first threshold, the cross-frequency universal basis is calculated based on the information of the low-frequency uplink channel and the antenna panel array position information sent by the terminal device, thereby ensuring the effectiveness of subsequent measurements of the high-frequency uplink channel. On the other hand, after receiving the cross-frequency universal basis, the terminal device can generate a high-frequency sparse uplink SRS based on the cross-frequency universal basis and send the high-frequency sparse uplink SRS to the network device in the sparse path cluster direction indicated by the cross-frequency universal basis, without having to send the uplink SRS in a full-port round-robin manner on the antenna surface, thereby reducing the number of uplink SRSs sent. As a result, the network device only needs to receive the uplink SRS in the sparse path cluster direction and, in combination with the calculated cross-frequency universal basis, can measure the high-frequency uplink channel, shortening the measurement period of the high-frequency uplink channel and improving the measurement efficiency and accuracy of the high-frequency uplink channel.

[0164] As described in S501 and S504, in another optional implementation, when the terminal device itself calculates the universal inter-frequency basis, the network device can obtain the universal inter-frequency basis from the terminal device. The following, combined with the embodiment shown in FIG9 , provides a solution in which the terminal device itself calculates the universal inter-frequency basis and the network device obtains the universal inter-frequency basis from the terminal device.

[0165] For example, as shown in FIG9 , the communication method provided in the embodiment of the present application includes the following steps:

[0166] S901: The terminal device sends second frequency band combination configuration information to the network device. Correspondingly, the network device receives the second frequency band combination configuration information from the terminal device.

[0167] The second frequency band combination configuration information includes cross-frequency mutual assistance capability information, and the cross-frequency mutual assistance capability information is used to indicate that the terminal device has a cross-frequency mutual assistance function.

[0168] In the embodiment of the present application, since the cross-frequency universal basis is calculated by the terminal device itself, the terminal device does not need to report the array position information of the antenna panel in the low-frequency band to the network device.

[0169] For example, when the terminal device initially accesses a cell, it may add cross-frequency mutual assistance capability information to the band combination (Band Combination) configuration reported to the network device to obtain second band combination configuration information.

[0170] It should be noted that, for a detailed introduction to the cross-frequency mutual assistance capability information, reference may be made to the relevant description of the cross-frequency mutual assistance capability information in S601 above, which will not be repeated here.

[0171] S902: The network device sends instruction information to the terminal device. Correspondingly, the terminal device receives the instruction information from the network device.

[0172] Among them, the indication information is used to instruct the terminal device to enable the cross-frequency mutual assistance function.

[0173] In an embodiment of the present application, after receiving the second frequency band combination configuration information of the terminal device, if the network device learns that the terminal device has the cross-frequency mutual assistance function, it sends an indication information to the terminal device to instruct the terminal device to enable the cross-frequency mutual assistance function.

[0174] It is understandable that after receiving the indication information, the terminal device knows that the high-frequency uplink channel will be measured using a cross-frequency mutual assistance method at the current measurement moment.

[0175] Optionally, in an embodiment of the present application, the network device may send an indication message to the terminal device when the correlation value between the low-frequency uplink channel and the high-frequency uplink channel corresponding to the previous measurement moment of the current measurement moment is greater than or equal to a second threshold.

[0176] The second threshold value may be a manually set value, which may be flexibly adjusted according to actual scenarios. For example, the second threshold value may be 5.

[0177] Optionally, in the embodiment of the present application, the second threshold value and the first threshold value may be equal or different, and the embodiment of the present application does not limit this.

[0178] Optionally, in the embodiment of the present application, in order to ensure normal uplink communication between the terminal device and the network device, the network device needs to measure the information of the low-frequency uplink channel and the high-frequency uplink channel, and select the channel measurement method used for the next channel estimation based on the correlation between the low-frequency uplink channel and the high-frequency uplink channel. The information of the low-frequency uplink channel can be measured using H Low The matrix form of Low Indicates low frequency; the information of high frequency uplink channel can be expressed as H High The matrix form of High Indicates high frequency.

[0179] In one possible implementation, when the correlation value between the low-frequency uplink channel and the high-frequency uplink channel is greater than or equal to the second threshold, the cross-frequency universal base proposed in the embodiment of the present application is used to measure the high-frequency uplink channel, otherwise the channel measurement method in the relevant technology continues to be used to measure the high-frequency uplink channel. In this way, it is ensured that the relevant information of the low-frequency uplink channel can be effectively utilized to assist in measuring the high-frequency uplink channel under the premise that the correlation between the high and low frequency channels is significant, and it is also ensured that when the correlation between the high and low frequency channels is not significant, it falls back to the relevant technology to ensure that the high-frequency uplink channel measurement is successful. In other words, optionally, in an embodiment of the present application, the network device can send the above-mentioned indication information to the terminal device when the correlation value between the low-frequency uplink channel and the high-frequency uplink channel corresponding to the previous measurement moment of the current measurement moment is greater than or equal to the second threshold.

[0180] The way in which the network device determines whether the correlation value between the low-frequency uplink channel and the high-frequency uplink channel corresponding to the previous measurement moment of the current measurement moment is greater than or equal to the second threshold can be referred to the embodiment described in Figure 6 and will not be repeated here.

[0181] For example, as shown in FIG10 , it is a judgment logic diagram of a network device. After the network device obtains the low-frequency uplink channel and the high-frequency uplink channel at the last measurement moment according to the existing technology, it calculates the correlation value of the low-frequency uplink channel and the high-frequency uplink channel according to the correlation calculation function: Cov(·): Low ,H High ), and determine the correlation value: Cov(H Low ,H High ) is greater than or equal to a second threshold: threshold. If so, the network device uses the communication method provided in the embodiment of the present application to measure the high-frequency uplink channel at the current measurement moment and starts sending indication information and a low-frequency CSI-RS to the terminal device; if not, the network device uses the communication method provided in the prior art to measure the high-frequency uplink channel at the current measurement moment and starts receiving a high-frequency uplink SRS from the terminal device.

[0182] For example, take the second threshold value as 5. If the Cov(H Low ,H High )=8, it indicates that the correlation between the low-frequency uplink channel and the high-frequency uplink channel is significant. At this time, the network device sends an instruction message to the terminal device to instruct the terminal device to enable the cross-frequency mutual assistance function and use the cross-frequency universal basis proposed in the embodiment of the present application to measure the high-frequency uplink channel; If the above Cov(H Low ,H High )=3, it indicates that the correlation between the low-frequency uplink channel and the high-frequency uplink channel is not significant. At this time, the network device will not send indication information to the terminal device and continues to use the channel measurement method in the related art to measure the high-frequency uplink channel.

[0183] Furthermore, the terminal device determines whether to use the method provided in the embodiment of the present application to measure the high-frequency uplink channel at the current measurement moment by judging whether it has received indication information from the network device; or, to use the method provided by the prior art to measure the high-frequency uplink channel at the current measurement moment.

[0184] For example, as shown in Figure 11, a judgment logic diagram of a terminal device is provided. The terminal device determines whether it has received indication information from the network device. If so, the terminal device uses the communication method provided in the embodiment of the present application to measure the high-frequency uplink channel at the current measurement moment and begins to calculate the cross-frequency universal basis based on the low-frequency CSI-RS. If not, the terminal device uses the communication method provided in the prior art to measure the high-frequency uplink channel at the current measurement moment and begins to send a high-frequency uplink SRS to the network device.

[0185] Optionally, in order to ensure the effectiveness of each measurement of the high-frequency uplink channel, the network device needs to calculate the correlation value between the last measured low-frequency uplink channel and the high-frequency uplink channel before each measurement of the high-frequency uplink channel, and determine the size of the correlation value and the second threshold.

[0186] S903: The network device sends a low-frequency CSI-RS to the terminal device. Correspondingly, the terminal device receives the low-frequency CSI-RS from the network device.

[0187] The low-frequency CSI-RS is used to determine information of a low-frequency uplink channel.

[0188] In an embodiment of the present application, when the network device determines that the correlation value between the last measured low-frequency uplink channel and the high-frequency uplink channel is greater than or equal to a second threshold, the network device may also send a low-frequency CSI-RS to the terminal device so that the terminal device can determine the cross-frequency common basis based on the low-frequency CSI-RS.

[0189] S904: The terminal device determines a cross-frequency universal basis based on the low-frequency CSI-RS and array position information.

[0190] The array position information consists of the coordinate information of each array element on the antenna panel corresponding to the low-frequency band of the terminal device.

[0191] It should be noted that for a detailed introduction to the coordinate information of each array element, reference may be made to the relevant description of the coordinate information of each array element in S601 above; for a detailed introduction to the cross-frequency universal basis, reference may be made to the relevant description of the cross-frequency universal basis in S501 above, which will not be repeated here.

[0192] Optionally, in an embodiment of the present application, the terminal device can first determine the information of the low-frequency downlink channel based on the low-frequency CSI-RS, then determine the information of the low-frequency uplink channel based on the information of the low-frequency downlink channel, and finally determine the cross-frequency universal basis based on the information of the low-frequency uplink channel and the array position information.

[0193] Optionally, in the embodiment of the present application, since the low-frequency downlink channel and the low-frequency uplink channel have a channel reciprocity property in the time division duplex (TDD) mode, the terminal device can use the channel reciprocity property and combine the information of the low-frequency downlink channel to estimate the low-frequency uplink channel H. Low .

[0194] For example, after receiving the low-frequency CSI-RS, the terminal device may compare the low-frequency CSI-RS with a known reference CSI-RS to estimate the information of the current low-frequency downlink channel.

[0195] Furthermore, as shown in FIG9 , after the terminal device determines the cross-frequency universal base, the terminal device may execute the above-mentioned S502 and S503 , which will not be described in detail here.

[0196] S905: The terminal device sends the inter-frequency universal base to the network device. Correspondingly, the network device receives the inter-frequency universal base from the terminal device.

[0197] In an embodiment of the present application, after the terminal device calculates the cross-frequency universal basis, it needs to send the cross-frequency universal basis to the network device so that the network device can measure the high-frequency uplink channel based on the cross-frequency universal basis and the high-frequency sparse uplink SRS.

[0198] Furthermore, as shown in FIG9 , after the network device receives the cross-frequency universal base from the terminal device, the network device may execute the above S505 , which will not be described in detail here.

[0199] In the above technical solution, on the one hand, after learning that the terminal device has the cross-frequency mutual assistance function, the network device first calculates the correlation value of the low-frequency uplink channel and the high-frequency uplink channel corresponding to the previous measurement moment, so as to instruct the terminal device to turn on the cross-frequency mutual assistance function when the correlation value is greater than or equal to the second threshold, thereby ensuring the effectiveness of subsequent measurements of the high-frequency uplink channel; on the other hand, after receiving the indication information, the terminal device can calculate the cross-frequency universal basis based on the low-frequency CSI-RS and the antenna panel array position information of the terminal device, and then generate a high-frequency sparse uplink SRS based on the cross-frequency universal basis, and send the high-frequency sparse uplink SRS to the network device in the sparse path cluster direction indicated by the cross-frequency universal basis, without having to send the uplink SRS in a full-port round-robin manner across the antenna surface, so that the network device only needs to receive the uplink SRS in the sparse path cluster direction, and combine it with the cross-frequency universal basis from the terminal device to measure the high-frequency uplink channel, shortening the measurement period of the high-frequency uplink channel and improving the measurement efficiency and measurement accuracy of the high-frequency uplink channel.

[0200] It should be noted that, as described in S501 and S504, the way in which the terminal device and the network device obtain the cross-frequency universal base can be: when the network device itself calculates the cross-frequency universal base, the terminal device obtains the cross-frequency universal base from the network device; it can also be: when the terminal device itself calculates the cross-frequency universal base, the network device obtains the cross-frequency universal base from the terminal device; it can also be: the network device and the terminal device each calculate the cross-frequency universal base by referring to the above-mentioned self-calculated cross-frequency universal base. The embodiments of the present application do not make specific limitations on this.

[0201] The above primarily describes the solutions provided by the embodiments of the present application from the perspective of network element interaction. Accordingly, the embodiments of the present application also provide a communication device for implementing the various methods described above. The communication device can be a terminal device in the method embodiments described above, or a device including such a terminal device, or a component usable in a terminal device; or the communication device can be a network device in the method embodiments described above, or a device including such a network device, or a component usable in a network device. It will be understood that, to implement the aforementioned functions, the communication device includes hardware structures and / or software modules corresponding to the respective functions. Those skilled in the art will readily appreciate that, in conjunction with the various exemplary units and algorithm steps described in the embodiments disclosed herein, the present application can be implemented in hardware or a combination of hardware and computer software. Whether a function is implemented in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Professionals may use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this application.

[0202] In the embodiment of the present application, the communication device can be divided into functional modules according to the above method embodiment. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be understood that the division of modules in the embodiment of the present application is schematic and is only a logical functional division. In actual implementation, there may be other division methods.

[0203] For example, FIG12 is a schematic diagram of a communication device 1200 provided in an embodiment of the present application, which includes a transceiver module 1210 and optionally a processing module 1220. The transceiver module 1210, which may also be referred to as a transceiver unit, is used to implement transceiver functions, and may be, for example, a transceiver circuit, a transceiver, a transceiver, or a communication interface.

[0204] Taking the communication device 1200 as an example of the terminal device described in the above method embodiment, in one possible implementation manner:

[0205] Transceiver module 1210 is configured to obtain a cross-frequency universal basis. This cross-frequency universal basis is obtained based on information about the low-frequency uplink channel between the terminal device and the network device and array position information of the antenna panel in the low-frequency band corresponding to the terminal device. This cross-frequency universal basis is used to indicate the number of equivalent array elements of the antenna panel in the low-frequency band and the direction of the sparse path cluster in the high-frequency uplink channel between the terminal device and the network device. Processing module 1220 is configured to generate a high-frequency sparse uplink SRS based on the cross-frequency universal basis. Transceiver module 1210 is also configured to transmit the high-frequency sparse uplink SRS to the network device in the direction of the sparse path cluster.

[0206] Taking the communication device 1200 as the network device described in the above method embodiment as an example, in one possible implementation manner:

[0207] The transceiver module 1210 is used to obtain a cross-frequency universal basis, which is obtained based on the information of the low-frequency uplink channel between the terminal device and the network device and the array position information of the antenna panel of the low-frequency band corresponding to the terminal device. The cross-frequency universal basis is used to indicate the number of equivalent array elements of the antenna panel of the low-frequency band and the direction of the sparse path cluster in the high-frequency uplink channel between the terminal device and the network device. The transceiver module 1210 is also used to receive a high-frequency sparse uplink SRS from the terminal device, and the high-frequency sparse uplink SRS is generated based on the cross-frequency universal basis. The processing module 1220 is used to measure the high-frequency uplink channel based on the high-frequency sparse uplink SRS and the cross-frequency universal basis.

[0208] Taking the communication device 1200 as an example of the terminal device described in the above method embodiment, in one possible implementation manner:

[0209] Transceiver module 1210 is configured to transmit first frequency band combination configuration information to a network device. This first frequency band combination configuration information includes cross-frequency mutual assistance capability information and array position information. The cross-frequency mutual assistance capability information indicates that the terminal device has cross-frequency mutual assistance functionality, and the array position information includes the coordinate information of each array element on the antenna panel corresponding to the low and medium frequency bands of the terminal device. Transceiver module 1210 is also configured to receive a cross-frequency universal base from the network device.

[0210] Taking the communication device 1200 as the network device described in the above method embodiment as an example, in one possible implementation manner:

[0211] The transceiver module 1210 is configured to receive first frequency band combination configuration information from a terminal device, the first frequency band combination configuration information including cross-frequency mutual assistance capability information and array position information, wherein the cross-frequency mutual assistance capability information is used to indicate that the terminal device has cross-frequency mutual assistance functionality, and the array position information is composed of the coordinate information of each array element on the antenna panel corresponding to the low-frequency band of the terminal device. The processing module 1220 is configured to determine a cross-frequency universal basis based on the low-frequency uplink channel information and the array position information. The transceiver module 1210 is also configured to send a cross-frequency universal basis to the terminal device, where the cross-frequency universal basis is used to determine the high-frequency sparse uplink SRS.

[0212] Taking the communication device 1200 as an example of the terminal device described in the above method embodiment, in one possible implementation manner:

[0213] The transceiver module 1210 is used to send second frequency band combination configuration information to the network device, and the second frequency band combination configuration information includes cross-frequency mutual assistance capability information, wherein the cross-frequency mutual assistance capability information is used to characterize that the terminal device has a cross-frequency mutual assistance function. The transceiver module 1210 is also used to receive indication information from the network device, and the indication information is used to instruct the terminal device to turn on the cross-frequency mutual assistance function. The transceiver module 1210 is also used to receive a low-frequency CSI-RS from the network device. The processing module 1220 is used to determine the cross-frequency universal basis based on the low-frequency CSI-RS and the array position information, and the array position information is composed of the coordinate information of each array element on the antenna panel corresponding to the low-frequency band in the terminal device. The transceiver module 1210 is also used to send a cross-frequency universal basis to the network device.

[0214] Taking the communication device 1200 as the network device described in the above method embodiment as an example, in one possible implementation manner:

[0215] The transceiver module 1210 is used to receive second frequency band combination configuration information from the terminal device, where the second frequency band combination configuration information includes cross-frequency mutual assistance capability information, wherein the cross-frequency mutual assistance capability information is used to indicate that the terminal device has a cross-frequency mutual assistance function. The transceiver module 1210 is also used to send indication information to the terminal device, where the indication information is used to instruct the terminal device to enable the cross-frequency mutual assistance function. The transceiver module 1210 is also used to send a low-frequency CSI-RS to the terminal device, where the low-frequency CSI-RS is used to determine information about the low-frequency uplink channel. The transceiver module 1210 is also used to receive a cross-frequency universal substrate from the terminal device.

[0216] Among them, all relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional module and will not be repeated here. Optionally, the communication device 1200 may also include a storage module, which can be used to store instructions and / or data, and the processing module 1220 can read the instructions and / or data in the storage module.

[0217] In the embodiment of the present application, the communication device 1200 is presented in the form of various functional modules divided in an integrated manner. The "module" here can refer to a specific ASIC, circuit, processor and memory that executes one or more software or firmware programs, integrated logic circuit, and / or other devices that can provide the above functions. In a simple embodiment, those skilled in the art will appreciate that the communication device can take the form of the communication device 400 shown in Figure 4.

[0218] For example, the processor 411 in the communication device 400 shown in FIG4 may call computer-executable instructions stored in the memory 412 to enable the communication device 400 to execute the communication method in the above method embodiment.

[0219] Specifically, the functions / implementation processes of the transceiver module 1210 and the processing module 1220 in FIG12 can be implemented by the processor 411 in the communication device 400 shown in FIG4 calling computer-executable instructions stored in the memory 412. Alternatively, the functions / implementation processes of the processing module 1220 in FIG12 can be implemented by the processor 411 in the communication device 400 shown in FIG4 calling computer-executable instructions stored in the memory 412, and the functions / implementation processes of the transceiver module 1210 in FIG12 can be implemented by the transceiver 415 and / or antenna 416 in the communication device 400 shown in FIG4.

[0220] Since the communication device provided in the embodiment of the present application can execute the above-mentioned communication method, the technical effects that can be obtained can be referred to the above-mentioned method embodiment and will not be repeated here.

[0221] It should be understood that one or more of the above modules or units can be implemented by software, hardware, or a combination of the two. When any of the above modules or units is implemented in software, the software exists in the form of computer program instructions and is stored in a memory, and a processor can be used to execute the program instructions and implement the above method flow. The processor can be built into an SoC (system on chip) or an ASIC, or it can be an independent semiconductor chip. In addition to the core used to execute software instructions to perform calculations or processing within the processor, it can further include necessary hardware accelerators, such as field programmable gate arrays (FPGAs), PLDs (programmable logic devices), or logic circuits that implement dedicated logic operations.

[0222] When the above modules or units are implemented in hardware, the hardware can be any one or any combination of a CPU, a microprocessor, a digital signal processing (DSP) chip, a microcontroller unit (MCU), an artificial intelligence processor, an ASIC, a SoC, an FPGA, a PLD, a dedicated digital circuit, a hardware accelerator or a non-integrated discrete device, which can run the necessary software or not rely on the software to execute the above method flow.

[0223] Optionally, an embodiment of the present application further provides a communication device (for example, the communication device may be a chip or a chip system), which includes a processor for implementing the method in any of the above method embodiments. In one possible design, the communication device also includes a memory. The memory is used to store necessary program instructions and data, and the processor can call the program code stored in the memory to instruct the communication device to execute the method in any of the above method embodiments. Of course, the memory may not be in the communication device. When the communication device is a chip system, it may be composed of a chip, or it may include a chip and other discrete devices, which is not specifically limited in the embodiment of the present application.

[0224] Optionally, an embodiment of the present application also provides a computer-readable storage medium, which stores a computer program or instruction. When the computer program or instruction is run on a communication device, the communication device can execute the method described in any of the above method embodiments or any of its implementation methods.

[0225] Optionally, an embodiment of the present application further provides a communication system, which includes the network device described in the above method embodiment and the terminal device described in the above method embodiment.

[0226] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware, or any combination thereof. When implemented using a software program, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions according to the embodiments of the present application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

[0227] Although the present application is described herein in conjunction with various embodiments, in the process of implementing the claimed application, those skilled in the art may understand and implement other variations of the disclosed embodiments by reviewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in the claims. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0228] Although the present application has been described with reference to specific features and embodiments thereof, it is apparent that various modifications and combinations may be made thereto without departing from the scope of the present application. Accordingly, this specification and the drawings are merely illustrative of the present application as defined by the appended claims and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, the present application is intended to include such modifications and variations as fall within the scope of the claims of the present application and their equivalents.

Claims

1. A communication method, characterized in that, Applied to a terminal device, the method includes: Obtain a cross-frequency common basis, which is obtained based on information of an uplink channel in a first frequency band between the terminal device and a network device and array position information of an antenna panel corresponding to the first frequency band of the terminal device. The cross-frequency common basis is used to indicate the number of equivalent array elements of the antenna panel in the first frequency band and the direction of a sparse path cluster in an uplink channel in a second frequency band between the terminal device and the network device, and the first frequency band is different from the second frequency band; Generate a sparse uplink sounding reference signal (SRS) for the second frequency band according to the cross-frequency common basis; Send the sparse uplink SRS for the second frequency band to the network device in the direction of the sparse path cluster.

2. The method according to claim 1, characterized in that, The first frequency band is a low-frequency band, and the second frequency band is a high-frequency band.

3. The method according to claim 2, wherein The direction of the sparse path cluster in the high-frequency uplink channel is obtained according to the direction of an equivalent path cluster in the low-frequency uplink channel, where the direction of the equivalent path cluster in the low-frequency uplink channel is determined according to information of the low-frequency uplink channel.

4. The method according to claim 2 or 3, characterized in that, The obtaining of the cross-frequency common basis includes: Send first frequency band combination configuration information to the network device, where the first frequency band combination configuration information includes cross-frequency mutual assistance capability information and the array position information. The cross-frequency mutual assistance capability information is used to represent that the terminal device has a cross-frequency mutual assistance function, and the array position information is composed of coordinate information of each array element on the antenna panel corresponding to the low-frequency band in the terminal device; Receive the cross-frequency common basis from the network device.

5. The method according to claim 2 or 3, characterized in that The obtaining of the cross-frequency common basis includes: Receive a low-frequency channel state information reference signal (CSI-RS) from the network device; Determine the cross-frequency common basis based on the low-frequency CSI-RS and the array position information, where the array position information is composed of coordinate information of each array element on the antenna panel corresponding to the low-frequency band in the terminal device.

6. The method according to claim 5, wherein The method further includes: Send second frequency band combination configuration information to the network device, where the second frequency band combination configuration information includes cross-frequency mutual assistance capability information, and the cross-frequency mutual assistance capability information is used to represent that the terminal device has a cross-frequency mutual assistance function; Receive indication information from the network device, where the indication information is used to indicate that the terminal device turns on the cross-frequency mutual assistance function.

7. The method according to claim 5 or 6, characterized in that The determining of the cross-frequency common basis based on the low-frequency CSI-RS and the array position information includes: Determine information of a low-frequency downlink channel according to the low-frequency CSI-RS; Determine information of the low-frequency uplink channel according to the information of the low-frequency downlink channel; Determine the cross-frequency common basis according to the information of the low-frequency uplink channel and the array position information.

8. The method according to any one of claims 5-7, characterized in that, The method further includes: Send the cross-frequency common basis to the network device.

9. A communication method, characterized in that, Applied to a network device, the method includes: Obtain a cross-frequency common basis, where the cross-frequency common basis is obtained based on information of an uplink channel in a first frequency band between the terminal device and the network device and array position information of an antenna panel corresponding to the first frequency band of the terminal device, and the cross-frequency common basis is used to indicate the number of equivalent array elements of the antenna panel in the first frequency band and the direction of a sparse path cluster in an uplink channel in a second frequency band between the terminal device and the network device, and the first frequency band is different from the second frequency band; Receive the sparse uplink sounding reference signal SRS in the second frequency band from the terminal device, where the sparse uplink SRS in the second frequency band is generated based on the cross-frequency common basis; Measure the uplink channel in the second frequency band according to the sparse uplink SRS in the second frequency band and the cross-frequency common basis.

10. The method according to claim 9, characterized in that, The first frequency band is a low-frequency band, and the second frequency band is a high-frequency band.

11. The method according to claim 10, wherein The direction of the sparse path cluster in the high-frequency uplink channel is obtained according to the direction of the equivalent path cluster in the low-frequency uplink channel, where the direction of the equivalent path cluster in the low-frequency uplink channel is determined according to the information of the low-frequency uplink channel.

12. The method according to claim 10 or 11, characterized in that, The obtaining of the cross-frequency common basis includes: Receive first frequency band combination configuration information from the terminal device, where the first frequency band combination configuration information includes cross-frequency mutual assistance capability information and the array position information, and the cross-frequency mutual assistance capability information is used to represent that the terminal device has the cross-frequency mutual assistance function, and the array position information is composed of coordinate information of each array element on the antenna panel corresponding to the low-frequency band in the terminal device Determine the cross-frequency common basis according to the information of the low-frequency uplink channel and the array position information.

13. The method according to claim 12, characterized in that, The method further includes: Send the cross-frequency common basis to the terminal device, where the cross-frequency common basis is used to determine the high-frequency sparse uplink SRS.

14. The method according to claim 12 or 13, characterized in that, The method further includes: Determine the information of the low-frequency uplink channel according to the low-frequency uplink SRS between the terminal device and the network device.

15. The method according to any one of claims 12 - 14, characterized in that The determining of the cross-frequency common basis according to the information of the low-frequency uplink channel and the array position information includes: When the correlation value between the low-frequency uplink channel corresponding to the previous measurement moment of the current measurement moment and the high-frequency uplink channel is greater than or equal to a first threshold, determine the cross-frequency common basis according to the array position information and the information of the low-frequency uplink channel corresponding to the current measurement moment.

16. The method according to claim 10 or 11, characterized in that The obtaining of the cross-frequency common basis includes: Receive the cross-frequency common basis from the terminal device.

17. The method according to claim 16, wherein The method further includes: Receive second frequency band combination configuration information from the terminal device, where the second frequency band combination configuration information includes cross-frequency mutual assistance capability information, and the cross-frequency mutual assistance capability information is used to represent that the terminal device has the cross-frequency mutual assistance function; Send indication information to the terminal device, where the indication information is used to indicate the terminal device to enable the cross-frequency mutual assistance function.

18. The method according to claim 16 or 17, characterized in that, The method further includes: Send a low-frequency channel state information reference signal CSI-RS to the terminal device, where the low-frequency CSI-RS is used to determine the information of the low-frequency uplink channel.

19. The method according to any one of claims 16-18, characterized in that, Sending the indication information to the terminal device includes: When a correlation value between a low-frequency uplink channel and a high-frequency uplink channel corresponding to a previous measurement moment of the current measurement moment is greater than or equal to a second threshold, sending the indication information to the terminal device.

20. A communication device, characterized in that, including: A functional unit for performing the function of the method according to any one of claims 1-19; wherein, the actions performed by the functional unit are implemented by hardware or by hardware executing corresponding software.

21. A communication device, characterized in that, The communication device includes a processor; the processor is configured to run a computer program or instruction, or to use a logic circuit to enable the communication device to implement the method according to any one of claims 1-19.

22. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions or programs, and when the computer instructions or programs are run on a computer, the communication device is enabled to implement the method according to any one of claims 1-19.

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