Communication method, device and system

Abstract

The invention discloses a communication method, device and system, relates to the technical field of communication, and is used for improving the measurement efficiency and measurement precision of measuring a high-frequency uplink channel based on a sounding reference signal (SRS). The method comprises the following steps: acquiring a cross-frequency universal substrate which is obtained based on information of an uplink channel of a first frequency band between terminal equipment and network equipment and array position information of an antenna panel of the first frequency band corresponding to the terminal equipment, the cross-frequency universal substrate is used for indicating the number of equivalent array elements of an antenna panel of a first frequency band and a sparse path cluster direction in an uplink channel of a second frequency band between the terminal equipment and the network equipment, the first frequency band is different from the second frequency band, a sparse uplink SRS of the second frequency band is generated according to the cross-frequency universal substrate, and the sparse uplink SRS of the second frequency band is obtained in the sparse path cluster direction. And sending the sparse uplink SRS of the second frequency band to network equipment.

Description

Technical Field

[0001] This application relates to the field of communication technologies, and in particular, to communication methods, devices, and systems. Background Art

[0002] With the popularization of the fifth-generation mobile communication technology (5G) network, in order to support a larger transmission bandwidth, a carrier aggregation (CA) technology has been proposed to aggregate high-frequency bands and low-frequency bands to provide services for user equipment (UE). Among them, before using the CA technology for uplink transmission, it is necessary to measure the low-frequency uplink channel and the high-frequency uplink channel respectively to ensure the success of uplink transmission.

[0003] In the prior art, for the measurement of the low-frequency uplink channel and the high-frequency uplink channel, an uplink channel measurement scheme based on sounding reference signal (SRS) has been proposed. In this measurement scheme, the UE sends low-frequency SRS to the base station through the antenna port of the low-frequency band, and the UE sends high-frequency SRS to the base station through the antenna port of the high-frequency band. After receiving the low-frequency SRS and the high-frequency SRS, the base station calculates the low-frequency uplink channel according to the low-frequency SRS, and calculates the high-frequency uplink channel according to the high-frequency SRS.

[0004] However, usually the number of antenna ports in the high-frequency band of the UE is greater than the number of antenna ports in the low-frequency band. Since the number of antenna ports is proportional to the measurement period of the uplink channel, this will result in a longer measurement period for the high-frequency uplink channel, slowing down the measurement efficiency of the high-frequency uplink channel; at the same time, the increase in the measurement period will lead to an increase in the measurement delay, reducing the measurement accuracy of the high-frequency uplink channel. Therefore, how to improve the measurement efficiency and measurement accuracy of measuring the high-frequency uplink channel based on SRS has become an urgent problem to be solved at present. Summary of the Invention

[0005] Embodiments of this application provide a communication method, device, and system for improving the measurement efficiency and measurement accuracy of measuring the high-frequency uplink channel based on SRS.

[0006] In a first aspect, a communication method is provided. This method can be executed by a terminal device, or by components of the terminal device, such as a processor, a chip, or a chip system of the terminal device, or can also be implemented by a logic module or software that can implement all or part of the functions of the terminal device. Taking the case where this method can be executed by the terminal device as an example, the method includes: The terminal device first obtains 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 in the first frequency band corresponding to the terminal device. This 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. Then, based on this cross-frequency common 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 direction of the sparse path cluster.

[0007] Among them, 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.

[0008] In the above technical solution, since there may be a correlation between uplink channels in different frequency bands, therefore, by coupling the information of the uplink channel in one frequency band and the array position information of the antenna panel corresponding to this frequency band through the cross-frequency common 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-frequency and low-frequency channels for the terminal device to transmit data uplink, by coupling the information of the low-frequency uplink channel and the array position information of the antenna panel corresponding to the low-frequency band through the cross-frequency common basis, the direction of the sparse path cluster in the high-frequency uplink channel (i.e., the antenna port for sending the high-frequency uplink SRS) can be indicated. Further, 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 that in the high-frequency band, therefore, after the terminal device generates a high-frequency sparse uplink SRS based on the cross-frequency common basis, by sending the high-frequency sparse uplink SRS to the network device in the direction of the sparse path cluster, instead of sending the uplink SRS in a full-port round-robin manner across the antenna surface, the number of antenna ports for sending the uplink SRS is reduced, 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.

[0009] Combined with the first aspect above, in a possible implementation, the direction of the sparse path cluster in the high-frequency uplink channel is obtained based on the direction of the equivalent path cluster in the low-frequency uplink channel, and 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. Based on this solution, since the direction of the path cluster in the low-frequency uplink channel where the terminal device successfully transmits the low-frequency uplink SRS can be used to determine the direction of the sparse path cluster that can successfully transmit the high-frequency sparse uplink SRS. Therefore, the number of antenna ports for transmitting the uplink SRS is reduced, thereby shortening the period of measuring the high-frequency uplink channel according to the high-frequency uplink SRS, and improving the measurement efficiency and measurement accuracy of the high-frequency uplink channel.

[0010] Combined with the first aspect above, in a possible implementation, the terminal device obtains a cross-frequency common base, including: the terminal device first sends 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, where the cross-frequency mutual assistance capability information is used to characterize that the terminal device has the cross-frequency mutual assistance function, and the array position information is composed of the coordinate information of each element on the antenna panel corresponding to the low-frequency band in the terminal device, and then receives the cross-frequency common base from the network device. In this way, the terminal device can receive the cross-frequency common base from the network device to generate and transmit the high-frequency sparse uplink SRS based on the cross-frequency common base, 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.

[0011] Combined with the first aspect above, in a possible implementation, the terminal device obtains a cross-frequency common base, including: the terminal device first receives the low-frequency channel state information reference signal (CSI-RS) from the network device, and then determines the cross-frequency common base 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 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 common base by itself to generate and transmit the high-frequency sparse uplink SRS based on the cross-frequency common base, 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 common base by itself in combination with the array position information, without calculating in the network device, saving the resource consumption of the network device.

[0012] Combined with the above first aspect, in a possible implementation manner, the communication method provided by the embodiments of the present application further includes: The terminal device may first 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 characterize that the terminal device has the cross-frequency mutual assistance function. Then, the terminal device receives indication information from the network device, and the indication information is used to instruct the terminal device to enable the cross-frequency mutual assistance function. In this way, when the terminal device receives the indication information, it enables the cross-frequency mutual assistance function to calculate the cross-frequency common base, which can ensure the effectiveness of measuring the high-frequency uplink channel based on the cross-frequency common base subsequently.

[0013] Combined with the above first aspect, in a possible implementation manner, the above terminal device determines the cross-frequency common base based on the low-frequency CSI-RS and the array position information, including: The terminal device first determines the information of the low-frequency downlink channel according to the low-frequency CSI-RS, 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, and finally combines the array position information and the information of the low-frequency uplink channel to calculate the cross-frequency common base, so as to ensure the accuracy of the calculated cross-frequency common base.

[0014] Combined with the above first aspect, in a possible implementation manner, the communication method provided by the embodiments of the present application further includes: After calculating the cross-frequency common base, the terminal device sends the cross-frequency common base to the network device. This enables the network device to directly measure the high-frequency uplink channel based on the cross-frequency common base, improving the measurement efficiency and measurement accuracy of the high-frequency uplink channel.

[0015] In a second aspect, a communication method is provided. This method can be executed by a network device, or by components of the network device, such as the processor, chip, or chip system of the network device, or can also be implemented by a logic module or software that can implement all or part of the functions of the network device. Taking the example that this method can be executed by the network device, the method includes: The network device first obtains a cross-frequency common base, which is obtained based on the information of the uplink channel of the first frequency band between the terminal device and the network device and the array position information of the antenna panel of the first frequency band corresponding to the terminal device. The cross-frequency common base is used to indicate the number of equivalent array elements of the antenna panel of the first frequency band and the direction of the sparse path cluster in the uplink channel of the second frequency band between the terminal device and the network device. Then, the network device receives the sparse uplink SRS of the second frequency band from the terminal device, and the sparse uplink SRS of the second frequency band is generated based on the cross-frequency common base. Finally, the network device measures the uplink channel of the second frequency band according to the sparse uplink SRS of the second frequency band and the cross-frequency common base.

[0016] Among them, 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.

[0017] In the above technical solution, since there may be a correlation between uplink channels of different frequency bands, coupling the information of the uplink channel of one frequency band and the array position information of the antenna panel corresponding to this frequency band through a cross-frequency common base can 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 for the network device to receive uplink data, coupling the information of the low-frequency uplink channel and the array position information of the antenna panel corresponding to the low-frequency band through a cross-frequency common base can indicate the direction of the sparse path cluster in the high-frequency uplink channel (i.e., the antenna port for transmitting the high-frequency uplink SRS). Further, 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 that in the high-frequency band, the network device receives the high-frequency sparse uplink SRS from the terminal device in the direction of the sparse path cluster, without receiving the uplink SRS in the way of full-port round-robin reception on the antenna surface, reducing the number of received uplink SRS, thereby shortening the period of measuring the high-frequency uplink channel according to the uplink SRS and improving the measurement efficiency and accuracy of the high-frequency uplink channel.

[0018] Combined with the second aspect above, in a possible implementation manner, the direction of the sparse path cluster in the above high-frequency uplink channel is obtained according to the equivalent path cluster direction in the low-frequency uplink channel, where the equivalent path cluster direction in the low-frequency uplink channel is determined according to the information of the low-frequency uplink channel. Based on this solution, since the direction of the path cluster in the low-frequency uplink channel where the network device successfully receives the low-frequency uplink SRS can be used to determine the direction of the sparse path cluster where the high-frequency sparse uplink SRS can be successfully received. Therefore, the number of antenna ports for receiving the uplink SRS is reduced, thereby shortening the measurement period of the high-frequency uplink channel and improving the measurement efficiency and accuracy of the high-frequency uplink channel.

[0019] Combined with the second aspect above, in a possible implementation manner, the network device obtains a cross-frequency common base, 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, where the cross-frequency mutual assistance capability information is used to characterize that the terminal device has the cross-frequency mutual assistance function, and the array position information is composed of the coordinate information of each element on the antenna panel corresponding to the low-frequency band in the terminal device, and then determines the cross-frequency common base according to the information of the low-frequency uplink channel and the array position information. In this way, the network device can calculate the cross-frequency common base by itself to measure the high-frequency uplink channel based on this cross-frequency common base, shortening the period of measuring the high-frequency uplink channel according to the uplink SRS and improving the measurement efficiency and accuracy of the high-frequency uplink channel.

[0020] Combined with the second aspect above, in a possible implementation manner, the communication method provided by the embodiments of the present application further includes: after calculating the cross-frequency common basis, the network device sends the cross-frequency common basis to the terminal device, so that the terminal device can directly use the cross-frequency common 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.

[0021] Combined with the second aspect above, in a possible implementation manner, the communication method provided by the embodiments of the present application further includes: the network device determines the information of the low-frequency uplink channel according to the low-frequency uplink SRS between the terminal device and the network device. In this way, before calculating the cross-frequency common basis, the network device first calculates the information of the low-frequency uplink channel in the manner of the existing technology to ensure that the cross-frequency common basis can be successfully calculated.

[0022] Combined with the second aspect above, in a possible implementation manner, the above-mentioned network device determines the cross-frequency common basis according to the information of the low-frequency uplink channel and the array position information, including: when the correlation value between the low-frequency uplink channel corresponding to the previous measurement moment of the current measurement moment of the network device and the high-frequency uplink channel is greater than or equal to the first threshold, the network device determines 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. In this way, the network device determines whether to calculate the cross-frequency common basis by comparing the correlation value between the high and low frequency uplink channels with the first threshold, ensuring the effectiveness of the high-frequency uplink channel measured according to the cross-frequency common basis subsequently.

[0023] Combined with the second aspect above, in a possible implementation manner, the above-mentioned network device obtains the cross-frequency common basis, including: the network device receives the cross-frequency common basis from the terminal device. In this way, the network device can receive the cross-frequency common basis from the terminal device to measure the high-frequency uplink channel based on the cross-frequency common 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.

[0024] Combined with the second aspect above, in a possible implementation manner, the communication method provided by the embodiments of the present application further 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, where 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 indication information to the terminal device, and the indication information is used to instruct the terminal device to enable the cross-frequency mutual assistance function. In this way, after learning that the terminal device has the cross-frequency mutual assistance function, the network device sends indication information to the terminal device to enable the terminal device to enable the cross-frequency mutual assistance function, so as to ensure that the high-frequency uplink channel can be measured in a cross-frequency mutual assistance manner subsequently.

[0025] Combined with the second aspect above, in a possible implementation, the communication method provided by the embodiments of the present application further includes: the network device sends 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 common basis by combining the information of the low-frequency uplink channel and the array position information.

[0026] Combined with the second aspect above, in a possible implementation, the above-mentioned network device sends indication information to the terminal device, including: the network device sends 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. In this way, the network device determines whether to send indication information by comparing the correlation value of the high and low frequency uplink channels with the second threshold, ensuring the effectiveness of the terminal device to enable the cross-frequency mutual assistance function according to the indication information.

[0027] In a third aspect, a communication device is provided for implementing the above various methods. The communication device includes corresponding modules, units, or means for implementing the above methods. The modules, units, or means can be implemented by hardware, software, or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the above functions.

[0028] In some possible designs, the communication device may include a processing module and a transceiver module. The transceiver module, which can also be referred to as a transceiver unit, is used to implement the sending and / or receiving functions in any of the above aspects and any possible implementation manners thereof. The transceiver module can be composed of a transceiver circuit, a transceiver, a transceiver, or a communication interface. The processing module can be used to implement the processing functions in any of the above aspects and any possible implementation manners thereof.

[0029] 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 manners thereof.

[0030] In a fourth aspect, a communication device is provided, including: a processor and a memory; the memory is used to store computer instructions, and when the processor executes the instructions, the communication device is enabled to execute the methods in any of the above aspects.

[0031] In a fifth aspect, a communication device is provided, including: a processor and a communication interface; the communication interface is used to communicate with modules outside the communication device; the processor is used to execute computer programs or instructions to enable the communication device to execute the methods in any of the above aspects.

[0032] In a sixth aspect, a communication device is provided, including: at least one processor; the processor is configured to execute a computer program or instructions stored in a memory, so that the communication device executes the method according to any of the above aspects. The memory may be coupled to the processor, or may be independent of the processor.

[0033] Among them, the communication device in the above third aspect to the above sixth aspect may be: the terminal device in the above first aspect or any implementation manner in the first aspect, or a device including the above terminal device, or a device included in the above terminal device, such as a chip; the communication device in the above third aspect to the above sixth aspect may be: the network device in the above second aspect or any implementation manner in the second aspect, or a device including the above network device, or a device included in the above network device, such as a chip.

[0034] In a seventh aspect, a computer-readable storage medium is provided, in which a computer program or instructions are stored, and when it runs on a communication device, the communication device can execute the method according to any of the above aspects or any of its implementation manners.

[0035] In an eighth aspect, a computer program product including instructions is provided, and when it runs on a communication device, the communication device can execute the method according to any of the above aspects or any of its implementation manners.

[0036] In a ninth aspect, a communication device (for example, the communication device may be a chip or a chip system) is provided, and the communication device includes a processor for implementing the functions involved in any of the above aspects or any of its implementation manners.

[0037] In some possible designs, the communication device includes a memory for storing necessary program instructions and data.

[0038] In some possible designs, when the communication device is a chip system, it may be composed of chips or may include chips and other discrete devices.

[0039] It can be understood that when the communication device provided in any of the sixth aspect to the ninth aspect 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.

[0040] In a tenth aspect, a communication system is provided, which includes a terminal device for executing the method described in the above first aspect and a network device for executing the method described in the above second aspect.

[0041] Among them, for the technical effects brought by any implementation manner in the third aspect to the tenth aspect, reference can be made to the technical effects brought by the corresponding implementation manners in the first aspect and the second aspect, which will not be elaborated here.

[0042] Among them, it should be noted that various possible implementation manners of any one of the above aspects can be combined on the premise that the solutions do not conflict with each other. Description of the Drawings

[0043] Figure 1 It is an antenna deployment architecture diagram of a terminal device provided in the related art;

[0044] Figure 2 It is a schematic flowchart of a communication method provided in the related art;

[0045] Figure 3 It is a schematic structural diagram of a communication system provided in an embodiment of the present application;

[0046] Figure 4 It is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0047] Figure 5 It is a schematic flowchart of a communication method provided in an embodiment of the present application;

[0048] Figure 6 It is a schematic flowchart of another communication method provided in an embodiment of the present application;

[0049] Figure 7 It is a judgment logic diagram of a network device provided in an embodiment of the present application;

[0050] Figure 8 It is a judgment logic diagram of a terminal device provided in an embodiment of the present application;

[0051] Figure 9 It is a schematic flowchart of another communication method provided in an embodiment of the present application;

[0052] Figure 10 It is a judgment logic diagram of another network device provided in an embodiment of the present application;

[0053] Figure 11 It is a judgment logic diagram of another terminal device provided in an embodiment of the present application;

[0054] Figure 12 It is a schematic structural diagram of another communication device provided in an embodiment of the present application. Detailed Embodiments

[0055] In the description of the present application, unless otherwise specified, " / " indicates that the objects associated before and after are in an "or" relationship. For example, A / B may represent A or B. The "and / or" in the present application is merely a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. Here, A and B can be singular or plural.

[0056] In the description of the present application, unless otherwise specified, "a plurality of" means two or more than two. "At least one (item) or similar expressions below" refers to any combination of these items, including any combination of single item (s) or plural item (s). For example, at least one (item) of a, b, and (or) c may represent: a, b, c, a - b, a - c, b - c, or a - b - c, where a, b, and c can be single or plural.

[0057] In addition, for the convenience of clearly describing the technical solutions of the embodiments of the present application, in the embodiments of the present application, terms such as "first" and "second" are used to distinguish identical or similar items with basically the same functions and roles. Those skilled in the art can understand that terms such as "first" and "second" do not limit the quantity and execution order, and terms such as "first" and "second" do not necessarily mean different.

[0058] In the embodiments of the present application, words such as "exemplarily" or "for example" are used to represent examples, illustrations, or explanations. Any embodiment or design solution described as "exemplarily" or "for example" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplarily" or "for example" is intended to present relevant concepts in a specific manner for easy understanding.

[0059] It can be understood that the "embodiments" mentioned throughout the specification mean that specific features, structures, or characteristics related to the embodiments 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 can be understood that in the various embodiments of the present application, the magnitude of the serial numbers of the various processes does not mean the sequence of execution, and the execution sequence of the various processes should be determined by their functions and internal logics, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] The purpose of co-base station deployment for high frequency and low frequency is to meet the evolving requirements of future communication network service scenarios. Considering the explosion of emerging downstream applications such as artificial intelligence generative content (AIGC) and extended reality (XR), it not only releases the traffic dividend but also gives rise to generational throughput and experience requirements, resulting in service bandwidths of 100 Gbps or even 1 Tbps. Therefore, the design of the air interface architecture also needs to evolve accordingly. One technical direction is to increase the antenna scale, empower spatial multiplexing (SM), use more advanced beamforming techniques, and increase the number of transmission streams.

[0065] Exemplarily, as Figure 1 shown, a typical value for the number of low-frequency (e.g., sub-6G band) antennas of existing terminal devices is 4, and a typical value for the number of high-frequency (e.g., U6G band) antennas is 16. For the higher-frequency FR2 band, even more antennas are required. Therefore, the more antennas there are and the larger the scale, the more transmission streams there will be. Facing the technical change goal of a larger-scale antenna architecture in the high-frequency band, the uplink channel measurement technology also needs to evolve adaptively.

[0066] In related technologies, an SRS-based uplink channel measurement technology has been proposed. SRS is mainly used for estimating the uplink channel quality between the UE and the base station. Specifically, since SRS is a set of reference sequences known to both the transmitter (UE) and the receiver (base station), and after the SRS is transmitted through the wireless channel, the amplitude and phase of the signal change. Therefore, the receiver compares the received sequence interfered by the channel with the known reference sequence, and can estimate the current channel condition, which is then used for the UE's uplink scheduling, uplink timing advance (TA), or uplink beam management, etc.

[0067] Note that the relevant information of SRS 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 SRS (such as being divided into three modes: 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 to be triggered by downlink control information (DCI) to send SRS; semi-static SRS means that after the UE receives the period indicated by the base station, it also needs to be activated by an additional medium access control (MAC) control element (CE) to send SRS periodically.

[0068] As Figure 2 shown, it is a schematic diagram of the 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 including but not limited to the time-domain characteristics of SRS, etc.). Then, the UE configures SRS according to the RRC signaling and sends SRS to the base station in the primary cell (low frequency) at moments such as Low ; and sends SRS to the base station in the secondary cell (high frequency) at moments such as High . Finally, the base station receives and estimates the low-frequency uplink channel at The base station receives and estimates the high-frequency uplink channel at

[0069] Among them, the subscript Low indicates that SRS is transmitted on the low-frequency uplink channel, and the subscript High indicates that SRS is transmitted on the high-frequency uplink channel. For each index i = 0, 1,..., n; in addition, and can be equal or not equal. The SRS transmissions on the low-frequency and high-frequency channels can both be periodic transmissions, or aperiodic transmissions, or semi-static transmissions.

[0070] However, since the measurement time of SRS is related to many factors, one of which is the number of antenna ports of the UE. When the number of UE antenna ports increases significantly, the SRS measurement period will also increase proportionally. Therefore, the delay of channel measurement will increase. For example, if the UE has 16 antenna elements deployed in the high-frequency band of U6G and 4 antenna elements deployed in the sub-6G low-frequency band, the time for one round of SRS measurement for the high-frequency band is 4 times that of the low-frequency band. Based on this, in the context of the terminal device deploying a large number of antenna ports in the high-frequency band, the measurement efficiency of the uplink channel is relatively slow. At the same time, the increase in the channel measurement period will cause the data measured by the base station to age, and will also reduce the accuracy of channel measurement. Therefore, in the context of the terminal device deploying a large number of antenna ports in the high-frequency band, new technologies are needed to improve the SRS measurement efficiency and measurement accuracy in the new business form.

[0071] To improve the measurement efficiency and measurement accuracy of the high-frequency uplink channel based on SRS, the embodiments of the present application provide related communication methods, devices and systems. The implementation manners of the embodiments of the present application will be described in detail below with reference to the accompanying drawings of the specification.

[0072] To facilitate the understanding of the embodiments of the present application, the following points are explained before introducing the embodiments of the present application.

[0073] 1. In the embodiments of the present application, "indication" may include direct indication and indirect indication, and may also include explicit indication and implicit indication. Taking the information indicated by a certain piece of information (such as the indication information below) as the information to be indicated, there are many ways to indicate the information to be indicated in the specific implementation process. For example, 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, where there is an association relationship between the other information and the information to be indicated. It is also possible to only indicate a part of the information to be indicated, while the other parts of the information to be indicated are known or pre-agreed. For example, the indication of specific information can also be achieved by relying on the arrangement order of each piece of information agreed in advance (such as protocol regulations), thereby reducing the indication overhead to a certain extent. At the same time, the common parts of each piece of information can be identified and indicated uniformly to reduce the indication overhead caused by separately indicating the same information.

[0074] 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 their various combinations, etc. The specific details of various indication methods can refer to the prior art and will not be elaborated herein. As can be seen from the above, for example, when multiple pieces of information of the same type need to be indicated, it is possible that the indication methods of different pieces of information are different. In the specific implementation process, the required indication method can be selected according to specific needs, and the embodiments of the present application do not limit the selected indication method. In this way, the indication methods involved in the embodiments 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.

[0075] 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 periods and / or sending timings of these sub-information can be the same or different. The specific sending method is not limited in the embodiments of the present application. Among them, the sending periods and / or sending timings of these sub-information can be predefined, such as 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 a combination of one or at least two of DCI.

[0076] 2. In the embodiments of the present application, descriptions such as "when...", "in the case of...", "if", and "when" all refer to that the device (such as a terminal device or a network device) will perform corresponding processing under a certain objective situation, which does not limit the time, and does not require the device (such as a terminal device or a network device) to have a judgment action during implementation, nor does it mean other limitations.

[0077] The embodiments of the present application can be applied to a long term evolution (LTE) system or a NR system (which can also be called a 5G system), a V2X system, a system of hybrid networking of LTE and NR, or a device-to-device (D2D) system, a machine-to-machine (M2M) communication system, an internet of thing (IoT) system (such as a narrow band internet of thing (NB-IoT) system), and other next-generation communication systems (such as a 6G system), etc. Or, the communication system can also be a non-3rd Generation Partnership Project (3GPP) communication system, without limitation.

[0078] In addition, the communication architecture and service scenarios described in the embodiments of this application are for more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. Those of ordinary skill in the art can know that with the evolution of the communication architecture and the emergence of new service scenarios, the technical solutions provided by the embodiments of this application are equally applicable to similar technical problems.

[0079] As Figure 3 shown, it is a schematic structural diagram of a communication system provided by an embodiment of this application. Figure 3 In this, the communication system 300 includes a network device 310 and a terminal device 320 as an example for illustration. Among them, the network device 310 and the terminal device 320 can perform uplink and downlink transmissions using radio interface resources. Optionally, the radio interface resources can include at least one of time domain resources, frequency domain resources, code resources, and spatial resources.

[0080] It should be noted that Figure 3 the shown system diagram is described by taking the communication system including one network device and one terminal device as an example. Of course, the communication system can include a greater number of network devices and terminal devices. In addition, the wireless communication between devices can include: the wireless communication between a network device and a terminal device, the wireless communication between network devices, and the wireless communication between terminal devices. The embodiments of this application do not make specific limitations on this.

[0081] In addition, the "wireless communication" in the embodiments of this application can also be abbreviated as "communication", and "communication" can also be described as "data transmission", "information transmission", or "transmission". The embodiments of this application do not make specific limitations on this.

[0082] Optionally, the network device in the embodiments 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. It is located on the network side of the above communication system, used to assist the terminal device in achieving wireless access, and is a device with wireless transceiver functions or a chip or chip system that can be set in the device. The network device includes but is not limited to: base station (BS), evolved NodeB (eNodeB), access point (AP), transmission reception point (TRP or transmission point, TP), next generation NodeB (gNB), the next generation base station in the 6G mobile communication system, the base station in the future mobile communication system, or the access node in the Wi-Fi system, etc. The network device can 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 radio controller in the centralized radio access network (CRAN) scenario. The network device can also be one or a group (including multiple antenna panels) of antenna panels of the base station in 5G, or, it can also be a network node that constitutes a gNB, a TRP, or a TP or a transmission measurement function (TMF), such as a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), a road side unit (RSU) with base station functions. Optionally, the network device can also be a server, a wearable device, a vehicle or an in-vehicle device, etc. For example, the network device in the V2X technology can be an RSU. All or part of the functions of the network device in the present application can 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 the present application can also be a logical node, a logical module or software that can implement all or part of the network device functions.

[0083] Among them, the CU and DU can be set separately, or can also be included in the same network element, such as in a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, such as included in 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, or a DU node, or a device including a CU node and a DU node. In addition, the CU can be classified as a network device in the radio access network (RAN), or the CU can be classified as a network device in the core network (CN), which is not limited here.

[0084] In different systems, the 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, the CU can also be called an O-CU (Open CU), the DU can also be called an O-DU, the CU-CP can also be called an O-CU-CP, the CU-UP can also be called an O-CU-UP, and the RU can also be called an O-RU. For the convenience of description, the CU, CU-CP, CU-UP, DU, and RU are used as examples in this application. Any one of the CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0085] In the embodiments of this application, the form of the network device is not limited. The device for implementing the functions of the network device can be the network device; it can also be a device capable of supporting the network device to implement this function, such as a chip system. This device can be installed in the network device or used in combination with the network device.

[0086] Optionally, the base stations in the embodiments of this application can 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 this application do not make specific limitations on this.

[0087] Optionally, the terminal device involved in this application may also be referred to as a terminal, which can be a device with wireless transceiver functions. It can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; it can also be deployed on the water surface (such as a ship, etc.); it can also be deployed in the air (such as an airplane, a balloon, a satellite, etc.). The terminal device can be a UE. Among them, the UE includes a handheld device, a vehicle-mounted device, a wearable device, or a computing device with wireless communication functions. Exemplarily, the UE can be a mobile phone, a tablet computer, or a computer with wireless transceiver functions. The terminal device can 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 remote medical treatment, a wireless terminal in a smart grid, a wireless terminal in a smart city, a wireless terminal in a smart home, and so on.

[0088] In the embodiments of this application, the form of the terminal device is not limited. The device for implementing the functions of the terminal device can be the terminal device; it can also be a device capable of supporting the terminal device to implement this function, such as a chip system, and this device can be installed in the terminal device or used in matching with the terminal device.

[0089] In a possible implementation manner, the network device and the terminal device in the embodiments of this application may also be referred to as communication devices, which can be a general device or a special device, and the embodiments of this application do not make specific limitations on this.

[0090] In a possible implementation manner, the relevant functions of the terminal device or the network device in the embodiments of this application can be implemented by one device, can also be jointly implemented by multiple devices, and can also be implemented by one or more functional modules in one device. The embodiments of this application do not make specific limitations on this. It can be understood that the above functions can be either network elements in hardware devices, software functions running on dedicated hardware, or a combination of hardware and software, or virtualized functions instantiated on a platform (such as a cloud platform).

[0091] When specifically implemented, Figure 3 both the network device and the terminal device shown can adopt Figure 4 the shown composition structure, or include Figure 4 the shown components. Figure 4Schematic diagram of the composition of a communication device 400 provided by an embodiment of the present application. 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 a communication device (such as a network device, a terminal device, or a chip, etc.), execute software programs, and process data of software programs.

[0092] Optionally, in one design, the processor 411 can include a program 413 (sometimes also referred to as code or instructions), and the program 413 can be run on the processor 411, so that the communication device 400 executes the methods described in the following embodiments.

[0093] Optionally, the communication device 400 can include one or more memories 412, on which there is a program 414 (sometimes also referred to as code or instructions), and the program 414 can be run on the processor 411, so that the communication device 400 executes the methods described in the following method embodiments.

[0094] Optionally, the processor 411 and / or the memory 412 can include artificial intelligence (AI) modules 417, 418, and the AI modules are used to implement AI-related functions. The AI modules can be implemented in a software, hardware, or software-hardware combination manner. For example, the AI module can include a RAN intelligent controller (RIC) module. For example, the AI module can be a near-real-time RIC or a non-real-time RIC.

[0095] Optionally, data can also be stored in the processor 411 and / or the memory 412. The processor and the memory can be set separately or integrated together.

[0096] Optionally, the communication device 400 can further include a transceiver 415 and / or an antenna 416. The processor 411 is sometimes also referred to as a processing unit and controls a communication device (such as a network device or a terminal device). The transceiver 415 is sometimes also referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., and is used to implement the transceiver function of the communication device through the antenna 416.

[0097] Optionally, in the embodiments 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.

[0098] Optionally, in the embodiments 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. It may also be 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 compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media, or other magnetic storage devices, without limitation.

[0099] Although not shown, as an optional implementation, the communication device 400 further includes an output device and an input device. Exemplarily, the input device is a device such as a keyboard, a mouse, a microphone, or a joystick, and the output device is a device such as a display screen and a speaker.

[0100] 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 with a Figure 4 similar structure. In addition, Figure 4 the shown component structure does not limit the communication device. Except for Figure 4 the shown components, the communication device may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0101] In the embodiments of the present application, the chip system may be composed of chips or may include chips and other discrete devices.

[0102] In addition, actions, terms, etc. involved among the embodiments of the present application can be referred to each other without limitation. The message names or parameter names in the messages exchanged between devices in the embodiments of the present application are only examples, and other names can also be used in specific implementations without limitation.

[0103] The following Figure 3 and Figure 4 , with reference to the following Figures 5 to 11 , the communication method provided by the embodiments of the present application will be described.

[0104] It should be noted that in the following embodiments of the present application, the message names between each network element, the names of each parameter, or the names of each piece of information are only examples, and other names can also be used in other embodiments. The communication method provided by the present application does not make specific limitations on this.

[0105] It can be understood that in the embodiments of the present application, each network element can execute some or all of the steps in the embodiments of the present application. These steps or operations are only examples, and the embodiments of the present application can also execute other operations or various deformations of the operations. In addition, each step can be executed in a different order presented in the embodiments of the present application, and it is possible not to execute all the operations in the embodiments of the present application.

[0106] Figure 5 is a schematic diagram of the communication method provided by the embodiments of the present application. This method is described by taking the interaction between a terminal device and a network device as an example. Of course, the entity executing the actions of the terminal device in this method can also be a device / module in the terminal device; the entity executing the actions of the network device in this method can also be a device / module in the network device. The embodiments of the present application do not make specific limitations on this.

[0107] It should be further noted that the following takes the first frequency band as the low-frequency band and the second frequency band as the high-frequency band as an example to describe the communication method provided by the embodiments of the present application, and will not be repeated hereinafter.

[0108] Exemplarily, as Figure 5 shown, the communication method provided by the embodiments of the present application includes:

[0109] S501. The terminal device obtains a cross-frequency common base.

[0110] Among them, the cross-frequency common base 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 common base is used to indicate the number of equivalent array elements of the antenna panel in the low-frequency band and the sparse path cluster direction in the high-frequency uplink channel between the terminal device and the network device.

[0111] In the embodiments of the present application, the direction of the sparse path clusters in the high-frequency uplink channel is obtained based on the direction of the equivalent path clusters in the low-frequency uplink channel, and the direction of the equivalent path clusters in the low-frequency uplink channel is determined according to the information of the low-frequency uplink channel.

[0112] Exemplarily, the cross-frequency common base can be characterized by [L, K, (θ1,…,θ K )]. Wherein, L is the number of equivalent array elements of the terminal device, and L is a positive integer; K is the number of equivalent channel path clusters between the network device and the terminal device, and K is a positive integer; (θ1,…,θ K ) is the incident angle of the first to the Kth equivalent channel path clusters between the network device and the terminal device, and the incident angle can be represented by a quantized angle (such as the floating-point data "3.0") or a bitmap angle grid (such as the boolean data "0100"). Among them, through K and (θ1,…,θ K ) the direction of the sparse path clusters in the high-frequency uplink channel between the terminal device and the network device can be indicated.

[0113] In the embodiments of the present application, the purpose of introducing the cross-frequency common base is to decouple information such as the arrangement of the antenna panel array elements corresponding to the actual 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, and construct a virtual array equivalent steering vector. That is, the above equivalent array elements are virtual array elements corresponding to the array elements on the actual antenna panel of the terminal device, and the above equivalent channel path clusters are virtual channel path clusters corresponding to the actual channel path clusters in the terminal device.

[0114] In an optional implementation manner, the terminal device can obtain the cross-frequency common base from the network device.

[0115] In another optional implementation manner, the terminal device can calculate the cross-frequency common base by itself.

[0116] S502. The terminal device generates a high-frequency sparse uplink SRS according to the cross-frequency common base.

[0117] In the embodiments of the present application, since the cross-frequency common base includes the number of equivalent array elements of the antenna panel in 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 common base, it can determine the direction of the sparse path clusters in the high-frequency uplink channel required for transmitting the high-frequency uplink SRS, and generate a high-frequency sparse uplink SRS in the direction of the sparse path clusters.

[0118] S503. The terminal device sends a high-frequency sparse uplink SRS to the network device in the direction of the sparse path clusters. Correspondingly, the network device receives the high-frequency sparse uplink SRS from the terminal device.

[0119] In the embodiment of the present application, since the cross-frequency common base can indicate the direction of the sparse path cluster in the high-frequency uplink channel between the terminal device and the network device, after obtaining the cross-frequency common base, the terminal device can send high-frequency sparse uplink SRS only in the direction of the sparse path cluster.

[0120] S504. The network device obtains the cross-frequency common base.

[0121] It should be noted that the relevant description of the cross-frequency common base can refer to the above step S501 and will not be elaborated here.

[0122] In an optional implementation manner, the network device can calculate the cross-frequency common base by itself.

[0123] In another optional implementation manner, the network device can obtain the cross-frequency common base from the terminal device.

[0124] S505. The network device measures the high-frequency uplink channel according to the high-frequency sparse uplink SRS and the cross-frequency common base.

[0125] In the embodiment of the present application, after receiving the high-frequency sparse uplink SRS, the network device can compare the high-frequency sparse uplink SRS with a known reference SRS, and then combine the cross-frequency common base to estimate the current high-frequency uplink channel.

[0126] In the above technical solution, since there is a correlation between the high-frequency and low-frequency channels for the terminal device to transmit data uplink, therefore, by coupling the information of the low-frequency uplink channel and the array position information of the antenna panel corresponding to the low-frequency band through the cross-frequency common base, the direction of the sparse path cluster in the high-frequency uplink channel (i.e., the antenna port for sending the high-frequency uplink SRS) can be indicated. Further, 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 that in the high-frequency band, after the terminal device generates the high-frequency sparse uplink SRS according to the cross-frequency common base, by sending the high-frequency sparse uplink SRS to the network device in the direction of the sparse path cluster, instead of sending the uplink SRS in the way of full-port rotation on the antenna surface, the number of antenna ports for sending the uplink SRS is reduced, thereby shortening the period of measuring the high-frequency uplink channel according to the uplink SRS and improving the measurement efficiency and accuracy of the high-frequency uplink channel.

[0127] As described in S501 and S504, in an optional implementation manner, when the network device calculates the cross-frequency common base by itself, the terminal device can obtain the cross-frequency common base from the network device. The following will combine Figure 6 the shown embodiment to give a solution for the terminal device to obtain the cross-frequency common base from the network device when the network device calculates the cross-frequency common base by itself.

[0128] Exemplarily, such as Figure 6 As shown, the communication method provided by the embodiment of the present application includes the following steps:

[0129] S601. The terminal device sends the first frequency band combination configuration information to the network device. Correspondingly, the network device receives the first frequency band combination configuration information from the terminal device.

[0130] 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.

[0131] Among them, the cross-frequency mutual assistance capability information is used to characterize that the terminal device has the cross-frequency mutual assistance function, and the terminal device can perform channel measurement based on this cross-frequency mutual assistance function.

[0132] Exemplarily, when the terminal device initially accesses the cell, it can add the cross-frequency mutual assistance capability information and the array position information to the frequency band combination (BandCombination) configuration reported to the network device to obtain the first frequency band combination configuration information.

[0133] It should be noted that the above initial access to the cell means that: after the terminal device is started, it starts to access the network for the first time, or the terminal device switches from the current serving cell to another cell.

[0134] In a possible implementation manner, an interband assistance field can be added to the BandCombination configuration, and the field length is 1 bit. If the value of this field is "1", it indicates that the terminal device has the cross-frequency mutual assistance function.

[0135] Among them, the array position information is composed of the coordinate information of each element on the antenna panel corresponding to the low-frequency band in the terminal device. For example, the terminal device is equipped with antenna panels for different frequency bands (such as two frequency bands: low-frequency band and high-frequency band) for signal reception and transmission, and each antenna panel is equipped with an antenna array composed of several elements.

[0136] In a possible implementation manner, the coordinate information of each element can be represented by spherical polar coordinates or three-dimensional rectangular coordinates.

[0137] In one example, the coordinate information of each antenna element is represented by spherical polar coordinates. Taking a certain position of the terminal device as the origin to establish a spherical polar coordinate system, the coordinate information of the i-th antenna 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.

[0138] Exemplarily, one or more fields such as an antenna radius list field, an antenna angle1 list field, or an antenna angle2 list field can be added to the BandCombination configuration. The field length of each field represents the number of antenna elements of the terminal device. Each element (antenna radius, antenna angle1, antenna angle2) in the field represents the distance, elevation angle, and azimuth angle of the antenna element relative to the origin in the spherical polar coordinate system, respectively.

[0139] In another example, the coordinate information of each antenna element is represented by a three-dimensional rectangular coordinate system. Taking a certain position of the terminal device as the origin to establish a three-dimensional rectangular coordinate system, the coordinate information of the i-th antenna 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.

[0140] Exemplarily, one or more fields such as an antenna coordinate X list field, an antenna coordinate Y list field, or an antenna coordinate Z list field can be added to the BandCombination configuration. The field length of each field represents the number of antenna elements of the terminal device. Each element (antenna coordinate X, antenna coordinate Y, antenna coordinate Z) in the field represents the x-axis coordinate, y-axis coordinate, and z-axis coordinate of the antenna element in the three-dimensional rectangular coordinate system, respectively.

[0141] S602. The network device determines the information of the low-frequency uplink channel according to the low-frequency uplink SRS between the terminal device and the network device.

[0142] In the embodiment of the present application, the terminal device needs to first send the 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 information of the current low-frequency uplink channel (such as the low-frequency uplink channel matrix) according to the low-frequency uplink SRS.

[0143] S603. The network device determines the cross-frequency common basis according to the information of the low-frequency uplink channel and the array position information.

[0144] In the embodiment of the present application, after the network device learns that the terminal device has the cross-frequency mutual assistance function according to 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 received array position information from the terminal device, and use a specific algorithm to calculate the cross-frequency common basis.

[0145] It should be noted that for the detailed introduction of the cross-frequency common basis, reference can be made to the relevant description of the cross-frequency common basis in S501 above, and details will not be elaborated here.

[0146] 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 for the next channel estimation based on the correlation strength between the low-frequency uplink channel and the high-frequency uplink channel. Among them, the information of the low-frequency uplink channel can be represented in the matrix form of H Low , where the subscript Low represents low frequency; the information of the high-frequency uplink channel can be represented in the matrix form of H High , where the subscript High represents high frequency.

[0147] In a possible implementation manner, when the correlation value between the low-frequency uplink channel and the high-frequency uplink channel is greater than or equal to the first threshold, the cross-frequency common basis 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 is continued to measure the high-frequency uplink channel. In this way, it not only ensures that the relevant information of the low-frequency uplink channel can be effectively utilized to assist in measuring the high-frequency uplink channel on the premise that the correlation between the high and low frequency channels is significant, but also ensures that when the correlation between the high and low frequency channels is not significant, it falls back to the related technology to ensure the success of the high-frequency uplink channel measurement. In other words, optionally, in the embodiment of the present application, the network device can 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 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.

[0148] Optionally, the first threshold can be a manually set value, which can be flexibly adjusted according to the actual scenario. For example, the first threshold can be 5.

[0149] The following gives an example of whether the network device determines that 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. Take as the moment when the terminal device sends the low-frequency uplink SRS to the network device, Take the time when the terminal device sends the high-frequency uplink SRS to the network device as an example. Assume that the time when the terminal device sends the low-frequency uplink SRS to the network device corresponding to the previous measurement time is At this time, the time when the terminal device sends the high-frequency uplink SRS to the network device is At this time, the uplink of the low-frequency channel sent by the terminal device to the network device And the uplink of the high-frequency channel The network device estimates the low-frequency uplink channel and the high-frequency uplink channel corresponding to the previous measurement time according to the uplink And the uplink respectively, and updates H Low And H High . Further, the network device calculates the correlation value of H Low And H High after the update, and determines whether the correlation value is greater than or equal to the first threshold. Low And H High The correlation value of, and determines whether the correlation value is greater than or equal to the first threshold.

[0150] Optionally, in the embodiments of the present application, M and N are positive integers. For any subscript p (0 ≤ p ≤ m, 0 ≤ p ≤ N), when the base station adopts RRC configuration, And Can be equal or not equal. The embodiments of the present application do not make specific limitations on this.

[0151] It should be noted that in the embodiments of the present application, the low-frequency uplink channel corresponding to the previous measurement time refers to the low-frequency uplink channel measured by the network device last time; similarly, the high-frequency uplink channel corresponding to the previous measurement time 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.

[0152] Exemplarily, as Figure 7 shown, it is the judgment logic diagram of the network device. After the network device measures the low-frequency uplink channel and the high-frequency uplink channel at the previous measurement time according to the existing technology, according to the correlation calculation function: Cov(·), it calculates the correlation value of the low-frequency uplink channel and the high-frequency uplink channel: Cov(H Low , H High ), and judges whether the correlation value: Cov(H Low , H High ) is greater than or equal to the first threshold: threshold. If so, the network device measures the high-frequency uplink channel at the current measurement time by using the communication method provided by the embodiments of the present application, and starts to calculate the cross-frequency common base; if not, the network device measures the high-frequency uplink channel at the current measurement time by using the communication method provided by the existing technology, and starts to receive the high-frequency uplink SRS from the terminal device.

[0153] For example, taking the above first threshold as 5. If the above 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 common base proposed in this embodiment of the 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.

[0154] Furthermore, the terminal device determines whether to use the method provided in this embodiment of the application to measure the high-frequency uplink channel at the current measurement moment by determining whether it has received the cross-frequency common base from the network device; or, uses the method provided by the existing technology to measure the high-frequency uplink channel at the current measurement moment.

[0155] Exemplarily, as Figure 8 shown, it is the judgment logic diagram of the terminal device. The terminal device determines whether it has received the cross-frequency common base from the network device. If so, the terminal uses the communication method provided in this embodiment of the application to measure the high-frequency uplink channel at the current measurement moment, and starts to determine the high-frequency sparse uplink SRS according to the cross-frequency common base; if not, the terminal device uses the communication method provided by the existing technology to measure the high-frequency uplink channel at the current measurement moment, and starts to send the high-frequency uplink SRS to the network device.

[0156] 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 low-frequency uplink channel and the high-frequency uplink channel measured last time before each measurement of the high-frequency uplink channel, and judge the size of the correlation value and the first threshold.

[0157] S604. The network device sends the cross-frequency common base to the terminal device. Correspondingly, the terminal device receives the cross-frequency common base from the network device.

[0158] Among them, the cross-frequency common base is used to determine the high-frequency sparse uplink SRS.

[0159] In this embodiment of the application, after calculating the cross-frequency common base, the network device needs to send the cross-frequency common base to the terminal device so that the terminal device can generate the high-frequency sparse uplink SRS according to the cross-frequency common base.

[0160] It can be understood that after receiving the cross-frequency common base, the terminal device knows that the cross-frequency mutual assistance method will be used to measure the high-frequency uplink channel at the current measurement moment.

[0161] Furthermore, as Figure 6As shown, after the terminal device receives the cross-frequency common base from the network device, the terminal device can execute S502 and S503 above, and the network device can execute S505 above, which will not be elaborated here.

[0162] In the above technical solution, on the one hand, after the network device learns that the terminal device has the cross-frequency mutual assistance function, it first calculates the correlation value between 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, it calculates the cross-frequency common base according to the information of the low-frequency uplink channel and the antenna panel array position information sent by the terminal device, thus ensuring the effectiveness of subsequent high-frequency uplink channel measurement. On the other hand, after receiving the cross-frequency common base, the terminal device can generate a high-frequency sparse uplink SRS according to the cross-frequency common base and send the high-frequency sparse uplink SRS to the network device in the sparse path cluster direction indicated by the cross-frequency common base, without sending the uplink SRS in the way of full-port round-robin on the antenna surface, reducing the number of uplink SRS sent. As a result, the network device only needs to receive the uplink SRS in the sparse path cluster direction and combine it with the calculated cross-frequency common base to 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.

[0163] As described in S501 and S504, in another optional implementation, when the terminal device calculates the cross-frequency common base by itself, the network device can obtain the cross-frequency common base from the terminal device. The following will be combined with Figure 9 the embodiments shown to give a solution for the terminal device to calculate the cross-frequency common base by itself and the network device to obtain the cross-frequency common base from the terminal device.

[0164] Exemplarily, as Figure 9 shown, the communication method provided by the embodiments of the present application includes the following steps:

[0165] 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.

[0166] Among them, 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.

[0167] In the embodiments of the present application, since the cross-frequency common base 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.

[0168] Exemplarily, when the terminal device initially accesses the cell, it can add cross-frequency mutual assistance capability information to the configured band combination reported to the network device to obtain the second band combination configuration information.

[0169] It should be noted that for a detailed introduction to the cross-frequency mutual assistance capability information, reference can be made to the relevant description of the cross-frequency mutual assistance capability information in S601 above, which will not be elaborated here.

[0170] S902. The network device sends indication information to the terminal device. Correspondingly, the terminal device receives the indication information from the network device.

[0171] Among them, the indication information is used to instruct the terminal device to enable the cross-frequency mutual assistance function.

[0172] In the embodiments of the present application, after receiving the second band combination configuration information of the terminal device, if the network device knows that the terminal device has the cross-frequency mutual assistance function, it sends indication information to the terminal device to instruct the terminal device to enable the cross-frequency mutual assistance function.

[0173] It can be understood that after receiving the indication information, the terminal device knows that the high-frequency uplink channel will be measured in the way of cross-frequency mutual assistance at the current measurement moment.

[0174] Optionally, in the embodiments of the present application, the network device may send indication information 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.

[0175] Among them, the second threshold can be a manually set value, which can be flexibly adjusted according to the actual scenario. For example, the second threshold can be 5.

[0176] Optionally, in the embodiments of the present application, the second threshold and the first threshold may be equal or unequal, and the embodiments of the present application do not limit this.

[0177] Optionally, in the embodiments 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 for the next channel estimation based on the correlation strength between the low-frequency uplink channel and the high-frequency uplink channel. Among them, the information of the low-frequency uplink channel can be represented in the matrix form of H Low with the subscript Low indicating low frequency; the information of the high-frequency uplink channel can be represented in the matrix form of H High with the subscript High indicating high frequency.

[0178] In a 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 common base proposed in the embodiments of the present application is used to measure the high-frequency uplink channel. Otherwise, the channel measurement method in the related art is continued to measure the high-frequency uplink channel. In this way, it not only ensures that the relevant information of the low-frequency uplink channel can be effectively utilized to assist in measuring the high-frequency uplink channel on the premise that the correlation between the high and low-frequency channels is significant, but also ensures that when the correlation between the high and low-frequency channels is not significant, it falls back to the related art to ensure the success of the high-frequency uplink channel measurement. In other words, optionally, in the embodiments of the present application, the network device may send the above 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.

[0179] Among them, the method for the network device to determine 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 refer to Figure 6 the described embodiments and will not be elaborated here.

[0180] Exemplarily, as Figure 10 shown, it is the judgment logic diagram of the network device. After the network device measures the low-frequency uplink channel and the high-frequency uplink channel of the previous measurement moment according to the existing technology, according to the correlation calculation function: Cov(·), it calculates the correlation value of the low-frequency uplink channel and the high-frequency uplink channel: Cov(H Low ,H High ), and judges whether the correlation value: Cov(H Low ,H High ) is greater than or equal to the second threshold: threshold. If so, the network device uses the communication method provided in the embodiments of the present application to measure the high-frequency uplink channel of the current measurement moment, and starts to send the indication information and the low-frequency CSI-RS to the terminal device; if not, the network device uses the communication method provided by the existing technology to measure the high-frequency uplink channel of the current measurement moment, and starts to receive the high-frequency uplink SRS from the terminal device.

[0181] For example, taking the second threshold as 5 above. If the above 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 indication information to the terminal device to indicate the terminal device to enable the cross-frequency mutual assistance function and measure the high-frequency uplink channel using the cross-frequency common base proposed in the embodiments of the present application; 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 does not send indication information to the terminal device and continues to measure the high-frequency uplink channel using the channel measurement method in the related technology.

[0182] Furthermore, the terminal device determines whether to measure the high-frequency uplink channel at the current measurement moment by using the method provided in the embodiments of the present application by determining whether it receives indication information from the network device; or measures the high-frequency uplink channel at the current measurement moment by using the method provided in the prior art.

[0183] Exemplarily, as Figure 11 shown, it is the judgment logic diagram of the terminal device. The terminal device determines whether it receives indication information from the network device. If so, the terminal device measures the high-frequency uplink channel at the current measurement moment by using the communication method provided in the embodiments of the present application and starts to calculate the cross-frequency common base based on the low-frequency CSI-RS; if not, the terminal device measures the high-frequency uplink channel at the current measurement moment by using the communication method provided in the prior art and starts to send the high-frequency uplink SRS to the network device.

[0184] Optionally, in order to ensure the effectiveness of each measurement of the high-frequency uplink channel, before each measurement of the high-frequency uplink channel, the network device needs to calculate the correlation value between the previously measured low-frequency uplink channel and the high-frequency uplink channel and judge the magnitude relationship between the correlation value and the second threshold.

[0185] S903. The network device sends the low-frequency CSI-RS to the terminal device. Correspondingly, the terminal device receives the low-frequency CSI-RS from the network device.

[0186] Among them, the low-frequency CSI-RS is used to determine the information of the low-frequency uplink channel.

[0187] In the embodiments of the present application, when the network device determines that the correlation value between the previously measured low-frequency uplink channel and the high-frequency uplink channel is greater than or equal to the second threshold, it can also send the low-frequency CSI-RS to the terminal device so that the terminal device can determine the cross-frequency common base based on the low-frequency CSI-RS.

[0188] S904. The terminal device determines the cross-frequency common base based on the low-frequency CSI-RS and the array position information.

[0189] Among them, 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.

[0190] It should be noted that for the detailed introduction of the coordinate information of each array element, reference can be made to the relevant description of the coordinate information of each array element in S601 above; for the detailed introduction of the cross-frequency common base, reference can be made to the relevant description of the cross-frequency common base in S501 above, and details are not described here again.

[0191] Optionally, in the embodiments of the present application, the terminal device may first determine the information of the low-frequency downlink channel according to the low-frequency CSI-RS, then determine the information of the low-frequency uplink channel according to the information of the low-frequency downlink channel, and finally determine the cross-frequency common basis according to the information of the low-frequency uplink channel and the array position information.

[0192] Optionally, in the embodiments of the present application, since in the time division duplex (TDD) mode, the low-frequency downlink channel and the low-frequency uplink channel have the property of channel reciprocity, the terminal device can utilize this channel reciprocity property to estimate the low-frequency uplink channel H by combining the information of the low-frequency downlink channel. Low 。

[0193] Exemplarily, after receiving the low-frequency CSI-RS, the terminal device can compare the low-frequency CSI-RS with the known reference CSI-RS to estimate the information of the current low-frequency downlink channel.

[0194] Further, as Figure 9 shown, after the terminal device determines the cross-frequency common basis, the terminal device can execute S502 and S503 above, which will not be elaborated here.

[0195] S905: The terminal device sends the cross-frequency common basis to the network device. Correspondingly, the network device receives the cross-frequency common basis from the terminal device.

[0196] In the embodiments of the present application, after calculating the cross-frequency common basis, the terminal device needs to send the cross-frequency common basis to the network device so that the network device can measure the high-frequency uplink channel according to the cross-frequency common basis and the high-frequency sparse uplink SRS.

[0197] Further, as Figure 9 shown, after the network device receives the cross-frequency common basis from the terminal device, the network device can execute S505 above, which will not be elaborated here.

[0198] In the above technical solution, on the one hand, after the network device learns that the terminal device has the cross-frequency mutual assistance function, it first calculates the correlation value between the low-frequency uplink channel and the high-frequency uplink channel corresponding to the previous measurement moment, so as to indicate the terminal device to enable 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 measurement of the high-frequency uplink channel; on the other hand, after receiving the indication information, the terminal device can calculate the cross-frequency common 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 according to the cross-frequency common basis, and send the high-frequency sparse uplink SRS to the network device in the direction of the sparse path cluster indicated by the cross-frequency common basis, without sending the uplink SRS in the way of over-the-air full-port round-robin. As a result, the network device only needs to receive the uplink SRS in the direction of the sparse path cluster and combine the cross-frequency common 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 accuracy of the high-frequency uplink channel.

[0199] It should be noted that, as described in S501 and S504, the method for the terminal device and the network device to obtain the cross-frequency common basis can be: when the network device calculates the cross-frequency common basis itself, the terminal device obtains the cross-frequency common basis from the network device; or it can be: when the terminal device calculates the cross-frequency common basis itself, the network device obtains the cross-frequency common basis from the terminal device; or it can be: the network device and the terminal device calculate the cross-frequency common basis respectively with reference to the above method of calculating the cross-frequency common basis by themselves. The embodiments of the present application do not make specific limitations on this.

[0200] The above mainly introduces the solution provided by the embodiments of the present application from the perspective of network element interaction. Correspondingly, the embodiments of the present application also provide a communication device, which is used to implement the above various methods. The communication device can be the terminal device in the above method embodiments, or a device including the above terminal device, or a component applicable to the terminal device; or, the communication device can be the network device in the above method embodiments, or a device including the above network device, or a component applicable to the network device. It can be understood that, in order to implement the above functions, the communication device includes the corresponding hardware structure and / or software module for executing each function. Those skilled in the art should easily realize that, combining the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0201] The embodiments of the present application can divide the communication device into functional modules according to the above method embodiments. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware or in the form of a software functional module. It should be understood that the division of modules in the embodiments of the present application is illustrative, only a logical function division, and there may be other division methods in actual implementation.

[0202] For example, Figure 12 FIG. Figure 12 is a schematic diagram of a communication device 1200 provided by an embodiment of the present application. The communication device includes a transceiver module 1210, and optionally includes a processing module 1220. The transceiver module 1210, also referred to as a transceiver unit, is used to implement the transceiver function. For example, it can be a transceiver circuit, a transceiver, a transceiver, or a communication interface.

[0203] Taking the communication device 1200 as the terminal device described in the above method embodiment, in a possible implementation:

[0204] The transceiver module 1210 is used to obtain a cross-frequency common base, 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 corresponding to the low-frequency band of the terminal device. The cross-frequency common base is used to indicate the number of equivalent array elements of the antenna panel in the low-frequency band and the sparse path cluster direction in the high-frequency uplink channel between the terminal device and the network device. The processing module 1220 is used to generate a high-frequency sparse uplink SRS according to the cross-frequency common base. The transceiver module 1210 is further used to send the high-frequency sparse uplink SRS to the network device in the sparse path cluster direction.

[0205] Taking the communication device 1200 as the network device described in the above method embodiment, in a possible implementation:

[0206] The transceiver module 1210 is used to obtain a cross-frequency common base, 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 corresponding to the low-frequency band of the terminal device. The cross-frequency common base is used to indicate the number of equivalent array elements of the antenna panel in the low-frequency band and the sparse path cluster direction in the high-frequency uplink channel between the terminal device and the network device. The transceiver module 1210 is further used to receive the high-frequency sparse uplink SRS from the terminal device, and the high-frequency sparse uplink SRS is generated based on the cross-frequency common base. The processing module 1220 is used to measure the high-frequency uplink channel according to the high-frequency sparse uplink SRS and the cross-frequency common base.

[0207] Taking the communication device 1200 as the terminal device described in the above method embodiment, in a possible implementation:

[0208] A transceiver module 1210 is configured to send first frequency band combination configuration information to a network device. The first frequency band combination configuration information includes cross-frequency mutual assistance capability information and array position information. The cross-frequency mutual assistance capability information is used to indicate that the terminal device has the cross-frequency mutual assistance function, and the array position information is composed of the coordinate information of each element on the antenna panel corresponding to the low-frequency band in the terminal device. The transceiver module 1210 is further configured to receive a cross-frequency common basis from the network device.

[0209] Taking the communication device 1200 as the network device described in the above method embodiment as an example, in a possible implementation:

[0210] A transceiver module 1210 is configured to receive first frequency band combination configuration information from a terminal device. The first frequency band combination configuration information includes cross-frequency mutual assistance capability information and array position information. The cross-frequency mutual assistance capability information is used to indicate that the terminal device has the cross-frequency mutual assistance function, and the array position information is composed of the coordinate information of each element on the antenna panel corresponding to the low-frequency band in the terminal device. A processing module 1220 is configured to determine a cross-frequency common basis according to the information of the low-frequency uplink channel and the array position information. The transceiver module 1210 is further configured to send the cross-frequency common basis to the terminal device, and the cross-frequency common basis is used to determine the high-frequency sparse uplink SRS.

[0211] Taking the communication device 1200 as the terminal device described in the above method embodiment as an example, in a possible implementation:

[0212] A transceiver module 1210 is configured to send second frequency band combination configuration information to a network device. The second frequency band combination configuration information includes cross-frequency mutual assistance capability information. The cross-frequency mutual assistance capability information is used to indicate that the terminal device has the cross-frequency mutual assistance function. The transceiver module 1210 is further configured to receive indication information from the network device, and the indication information is used to indicate the terminal device to enable the cross-frequency mutual assistance function. The transceiver module 1210 is further configured to receive low-frequency CSI-RS from the network device. A processing module 1220 is configured to determine a cross-frequency common basis based on the low-frequency CSI-RS and the array position information. The array position information is composed of the coordinate information of each element on the antenna panel corresponding to the low-frequency band in the terminal device. The transceiver module 1210 is further configured to send the cross-frequency common basis to the network device.

[0213] Taking the communication device 1200 as the network device described in the above method embodiment as an example, in a possible implementation:

[0214] A transceiver module 1210 is configured to receive second frequency band combination configuration information from a terminal device. The second frequency band combination configuration information includes cross-frequency mutual assistance capability information, where 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 further configured 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 further configured to send low-frequency CSI-RS to the terminal device, where the low-frequency CSI-RS is used to determine information about a low-frequency uplink channel. The transceiver module 1210 is further configured to receive a cross-frequency common base from the terminal device.

[0215] Wherein, all relevant contents of each step involved in the above method embodiments can be cited in the function descriptions of the corresponding functional modules, and will not be elaborated here. Optionally, the communication device 1200 may further include a storage module, and the storage module may be configured to store instructions and / or data, and the processing module 1220 may read the instructions and / or data in the storage module.

[0216] In the embodiments of the present application, the communication device 1200 is presented in a form of dividing each functional module in an integrated manner. Here, a "module" may refer to a specific ASIC, a circuit, a processor and a memory that execute one or more software or firmware programs, an integrated logic circuit, and / or other devices that can provide the above functions. In a simple embodiment, those skilled in the art may think that the communication device may adopt Figure 4 the form of the communication device 400 shown.

[0217] For example, Figure 4 the processor 411 in the communication device 400 shown may call computer-executable instructions stored in the memory 412, so that the communication device 400 executes the communication method in the above method embodiments.

[0218] Specifically, Figure 12 the functions / implementation processes of the transceiver module 1210 and the processing module 1220 in Figure 4 may be implemented by the processor 411 in the communication device 400 shown calling computer-executable instructions stored in the memory 412. Or, Figure 12 the functions / implementation processes of the processing module 1220 in Figure 4 may be implemented by the processor 411 in the communication device 400 shown calling computer-executable instructions stored in the memory 412, Figure 12 the functions / implementation processes of the transceiver module 1210 in Figure 4 may be implemented by the transceiver 415 and / or the antenna 416 in the communication device 400 shown.

[0219] Since the communication device provided by the embodiments of this application can execute the above communication method, the technical effects it can obtain can refer to the above method embodiments and will not be elaborated here.

[0220] It should be understood that one or more of the above modules or units can be implemented by software, hardware, or a combination of both. When any of the above modules or units is implemented by software, the software exists in the form of computer program instructions and is stored in the memory. The processor can be used to execute the program instructions and implement the above method flow. The processor can be built into the SoC (System on Chip) or ASIC, or it can be an independent semiconductor chip. In addition to the core for executing software instructions for arithmetic or processing in the processor, it can further include necessary hardware accelerators, such as field programmable gate array (FPGA), PLD (Programmable Logic Device), or logic circuits for implementing dedicated logic operations.

[0221] When the above modules or units are implemented by hardware, the hardware can be any one or any combination of CPU, microprocessor, digital signal processing (DSP) chip, microcontroller unit (MCU), artificial intelligence processor, ASIC, SoC, FPGA, PLD, dedicated digital circuit, hardware accelerator, or non-integrated discrete device, which can run the necessary software or execute the above method flow without relying on software.

[0222] Optionally, the embodiments of this application further provide a communication device (for example, the communication device can be a chip or a chip system). The communication device includes a processor for implementing the method in any of the above method embodiments. In a possible design, the communication device further includes a memory. The memory is used to store necessary program instructions and data. 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 can be composed of chips or can include chips and other discrete devices, and the embodiments of this application do not make specific limitations on this.

[0223] Optionally, the embodiments of this application further provide a computer-readable storage medium. The computer-readable storage medium stores computer programs or instructions. When it runs on a communication device, it enables the communication device to execute the method described in any of the above method embodiments or any of its implementation manners.

[0224] Optionally, an embodiment of the present application further provides a communication system, which includes the network device described in the foregoing method embodiment and the terminal device described in the foregoing method embodiment.

[0225] In the foregoing embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using a software program, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions according to the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center in a wired manner (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or a wireless manner (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that the computer can access, or a data storage device such as a server or data center that includes one or more integrated media. The available medium can be a magnetic medium (such as a floppy disk, hard disk, magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (SSD)), etc.

[0226] Although the present application has been described in conjunction with various embodiments herein, however, in the process of implementing the claimed present application, those skilled in the art can understand and implement other changes of the disclosed embodiments by viewing the drawings, the disclosure content, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "one" does not exclude a plurality of cases. A single processor or other unit can implement several functions recited in the claims. Certain measures are recited in mutually different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0227] Although the present application has been described in connection with specific features and their embodiments, it will be apparent that various modifications and combinations can be made thereto without departing from the scope of the present application. Accordingly, the specification and drawings are merely exemplary illustrations of the present application as defined by the appended claims and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these changes and modifications.

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) in the second frequency band according to the cross-frequency common basis; Send the sparse uplink SRS in 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, characterized in that, 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 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. The first frequency band combination configuration information includes cross-frequency mutual assistance capability information and the array position information, where 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 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. The second frequency band combination configuration information includes cross-frequency mutual assistance capability information, where the cross-frequency mutual assistance capability information is used to characterize that the terminal device has a cross-frequency mutual assistance function; Receive indication information from the network device, and 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 to 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 the uplink channel of a first frequency band between the terminal device and the network device and array position information of the 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 of the first frequency band and the direction of the sparse path cluster in the 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; Receive the sparse uplink sounding reference signal SRS of the second frequency band from the terminal device, where the sparse uplink SRS of the second frequency band is generated based on the cross-frequency common basis; Measure the uplink channel of the second frequency band according to the sparse uplink SRS of 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 the 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. The cross-frequency mutual assistance capability information is used to characterize that the terminal device has the 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 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, wherein 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, characterized in that The method further includes: Receive the 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 characterize 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 the 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 functions 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 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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