Channel measurement method, apparatus, and communication system

Abstract

The embodiment of the application provides a kind of channel measurement method, device and communication system, it is related to wireless communication technical field.The channel measurement method comprises: obtaining the bandwidth part BWP corresponding channel frequency response CFR of each first signal of two or more than two first signals, two or more than two first signals are carried in two or more than two time domain units, the BWP of the first signal carried by the closest two time domain units partially overlaps or does not overlap in frequency domain, and two or more than two CFR fluctuation values are used to determine channel measurement result;Wherein, the first signal includes demodulation reference signal DMRS and / or data signal.The application can realize the channel measurement not limited by application scenario.

Description

Technical Field

[0001] This application relates to the field of wireless communication technology, and in particular to a channel measurement method, apparatus and communication system. Background Technology

[0002] In wireless communication, the transmission of wireless signals is affected by the channel. Therefore, channel measurement is usually performed before transmitting wireless signals to select a suitable channel and thus improve the transmission performance of wireless signals.

[0003] A typical channel measurement method could be as follows: the network device configures a channel state information reference signal (CSI-RS) for the terminal device, the terminal device receives and measures the CSI-RS to obtain the channel state information and reports it to the network device, and the network device configures the channel for the terminal device to transmit wireless signals based on the received channel state information.

[0004] However, in practical applications, there are often limitations, such as limited allocated bandwidth or higher efficiency requirements that preclude the configuration of CSI-RS. Therefore, how to achieve channel measurement that is not limited by application scenarios is an urgent problem to be solved. Summary of the Invention

[0005] To address the aforementioned technical problems, this application provides a channel measurement method, apparatus, and communication system. This channel measurement method can transmit demodulation reference signals (DMRS) and / or data signals in each time domain unit via frequency hopping, allowing for scenario-independent demodulation of reference signals (DMRS) and / or data signals. Consequently, the fluctuation value of the CFR corresponding to the bandwidth portion (BWP) of the demodulation reference signals (DMRS) and / or data signals in each time domain unit can be used to determine the channel measurement results, thus achieving channel measurement unrestricted by application scenarios.

[0006] In a first aspect, this application provides a channel measurement method, which can be executed by a terminal device or a module (such as a chip) in the terminal device. The method includes: acquiring the channel frequency response (CFR) fluctuation value corresponding to the bandwidth portion (BWP) of each of N first signals; wherein N is an integer greater than 1, the N first signals are respectively carried in N time-domain units, the BWP of the first signals carried by any two closest time-domain units partially overlap or do not overlap in the frequency domain, the N CFR fluctuation values ​​are used to determine the channel measurement result, and the first signals include a demodulation reference signal (DMRS) and / or a data signal.

[0007] This application embodiment utilizes DMRS and / or data signals in the PDSCH combined with frequency hopping transmission to achieve channel measurement, thereby addressing the application scenario limitations encountered when using CSI-RS for channel measurement. This method uses frequency hopping transmission to transmit a first signal across multiple time-domain units (two or more), where the frequency domain positions (or BWPs) corresponding to any two closest time-domain units (which can be consecutive or discontinuous) are different, i.e., partially overlapping or non-overlapping. In this way, the bandwidth of the multiple first signals is broadened to the union of the frequency domain positions (or BWPs) corresponding to each time-domain unit. Based on this, assuming the first signal carried in any time-domain unit is #n first signal, for example, the first signal #1 is carried in the first time-domain unit, the first signal #2 is carried in the second time-domain unit, ..., and the first signal #N is carried in the Nth time-domain unit, then the signals used for channel measurement include the first signals transmitted in each time-domain unit, that is, the signals used for channel measurement include the first signal #1, the first signal #2, ..., the first signal #N, where N is an integer greater than 1. Thus, by obtaining the CFR fluctuation value within the BWP corresponding to the first signal carried in each time-domain unit, it can be guaranteed that these CFR fluctuation values ​​can be used to determine the channel measurement results. Furthermore, the first signal includes DMRS and / or data signals. DMRS is used by the terminal device to demodulate data to complete data transmission and estimate the channel, and the data signal is used to transmit data. Both are signals in the physical downlink channel of wireless communication that are not limited by any particular scenario, thereby enabling channel measurement that is not limited by any application scenario.

[0008] According to the first aspect, any two closest time-domain units are either continuous in the time domain or discontinuous in the time domain.

[0009] This application embodiment can realize channel measurement in frequency hopping transmission scenarios where the two closest time-domain units carrying the first signal are continuous in the time domain or discontinuous in the time domain, further reducing the scenario limitations of channel measurement.

[0010] According to the first aspect, or any implementation of the first aspect above, the CFR fluctuation value is used to indicate the CFR change of each subcarrier in the BWP corresponding to the CFR fluctuation value; the N CFR fluctuation values ​​are used to determine the channel measurement result, including: determining the CFR of each subcarrier in the first BWP and / or the index of the first BWP based on the comparison result of the CFR fluctuation value corresponding to each BWP in the N BWPs with the threshold value, the first BWP including the BWPs whose comparison result satisfies the constraint among the N BWPs; and determining the channel measurement result based on the CFR of each subcarrier in the first BWP and / or the index of the first BWP.

[0011] In this embodiment, the CFR fluctuation value corresponding to the BWP can indicate the CFR changes of each subcarrier in the BWP. These changes reflect the channel conditions of the BWP, and different channel conditions can be distinguished by threshold values. Based on this, the CFR of each subcarrier in the first BWP and / or the index of the first BWP, determined by the terminal device according to the comparison results of each CFR fluctuation value and the threshold value, can indicate different channel conditions and thus can be used to determine channel measurement results.

[0012] According to the first aspect, or any implementation of the first aspect above, the threshold value includes a first threshold value associated with data transmission and / or a second threshold value associated with sensing; the constraint includes any one of the following: the CFR fluctuation value corresponding to BWP is less than the first threshold value; the CFR fluctuation value corresponding to BWP is greater than or equal to the first threshold value and less than or equal to the second threshold value; the CFR fluctuation value corresponding to BWP is greater than the second threshold value.

[0013] In this embodiment of the application, three comparison methods or constraints based on two threshold values ​​are used to determine the channel measurement results applicable to communication services and / or sensing services respectively, thereby ensuring that a channel with good communication performance, good sensing performance, or a combination of communication performance and sensing performance can be configured based on the channel measurement results.

[0014] According to the first aspect, or any implementation of the first aspect above, the union of N BWPs in the frequency domain includes the entire bandwidth of the channel.

[0015] In this embodiment, the base station can perform frequency hopping transmission of the first signal across the full bandwidth, i.e., the entire bandwidth of the channel, thereby further widening the bandwidth limit (BWP). By utilizing the channel frequency response of more BWPs, more comprehensive and accurate channel measurement results can be obtained. Thus, these channel measurement results can be used to optimize sensing performance.

[0016] According to the first aspect, or any implementation of the first aspect above, the method further includes: the method further includes: obtaining the first characteristic content of the BWP of each first signal according to each first signal, wherein the first characteristic content of the BWP of each first signal is used to indicate the content other than the CFR in the Type A characteristic QCL-Type A of the quasi-co-address QCL of the BWP of each first signal; determining the QCL-Type A of the BWP of each first signal according to the CFR of each subcarrier in the BWP of each first signal and the first characteristic content of the BWP of each first signal; and sharing the QCL characteristic of the BWP of each first signal with the quasi-co-address reference signal associated with each first signal according to the QCL-Type A of the BWP of each first signal, wherein the quasi-co-address reference signal associated with each first signal has a QCL relationship with each first signal.

[0017] In this embodiment, the terminal device can obtain the characteristic content (excluding CFR) of QCL-Type A corresponding to each first signal by measuring each first signal transmitted by the network device via frequency hopping. This first characteristic content, in turn, allows the terminal device to determine the QCL-Type A corresponding to each first signal based on the CFR and the first characteristic content. Therefore, for each first signal, QCL characteristics can be shared with reference signals that have a QCL relationship with it, based on the QCL-Type A corresponding to that first signal. This reduces the cost of obtaining QCL characteristics for different reference signals and simplifies spatial multiplexing of different ports on the antenna, thereby improving the performance of the communication system. It is understood that the first characteristic content corresponding to any first signal is the first characteristic content of the BWP of that first signal, the CFR corresponding to any first signal is the CFR of each subcarrier in the BWP of that first signal, and the QCL-Type A corresponding to any first signal is the QCL-Type A of the BWP of that first signal.

[0018] According to the first aspect, or any implementation of the first aspect above, the quasi-co-located reference signal includes a tracking reference signal TRS and / or a channel state information reference signal CSI-RS; according to the QCL-Type A of the BWP of each first signal, the QCL characteristics of the BWP of each first signal are shared with the quasi-co-located reference signal associated with each first signal, including: providing the QCL-Type A corresponding to each first signal to the TRS associated with each first signal, providing the QCL-Type A corresponding to each first signal to the CSI-RS associated with each first signal, and / or, receiving the frequency offset information in the Type B characteristic QCL-Type of the QCL provided by the TRS associated with each first signal.

[0019] In this embodiment of the application, the quasi-co-located reference signal associated with the first signal includes a tracking reference signal TRS and / or a channel state information reference signal CSI-RS, thereby multiplexing the QCL characteristics among multiple reference signals, further simplifying the spatial multiplexing of different ports on the antenna, and improving the performance of the communication system.

[0020] According to the first aspect, or any implementation of the first aspect above, after obtaining the channel frequency response (CFR) fluctuation value corresponding to the bandwidth portion (BWP) of each of the N first signals, the method further includes: reporting the channel measurement results.

[0021] In this embodiment of the application, the terminal device reports channel measurement results to the network device, so that the network device can configure a channel that is beneficial to improving service performance for the terminal device based on the received channel measurement results.

[0022] According to the first aspect, or any implementation of the first aspect above, before reporting the channel measurement results, the method further includes: compressing the channel measurement results.

[0023] In this embodiment, the terminal device compresses the channel measurement results. This compression reduces the amount of redundant data in the channel measurement results, thereby avoiding resource occupation by redundant data and improving system performance. For example, storing the compressed data avoids occupying storage resources. In an optional example, the terminal device compresses the channel measurement results before reporting them, which avoids redundant data occupying transmission resources, improves reporting efficiency and the processing efficiency of the network device for the channel measurement results, and further improves the performance of the communication system.

[0024] Secondly, this application provides a channel measurement method, which can be executed by a network device or a module (such as a chip) in the network device. The method includes: transmitting each of N first signals via frequency hopping; wherein N is an integer greater than 1, the N first signals are respectively carried in N time-domain units, the bandwidth portions (BWP) of the first signals carried in the two closest time-domain units partially overlap or do not overlap in the frequency domain, and the channel frequency response (CFR) fluctuation values ​​corresponding to the BWPs of the N first signals are used by a terminal device to obtain channel measurement results, wherein the first signals include a demodulation reference signal (DMRS) and / or a data signal.

[0025] According to the second aspect, any two closest time-domain units are either continuous in the time domain or discontinuous in the time domain.

[0026] According to the second aspect, or any implementation of the second aspect above, the CFR fluctuation value is used to indicate the CFR change of each subcarrier in the BWP corresponding to the CFR fluctuation value; the channel measurement result is the result determined according to the CFR of each subcarrier in the first BWP and / or the index of the first BWP; wherein, the first BWP includes BWPs among N BWPs whose comparison result between the CFR fluctuation value and the threshold value of the BWP satisfies the constraint.

[0027] According to the second aspect, or any implementation of the second aspect above, the threshold value includes a first threshold value associated with data transmission and / or a second threshold value associated with sensing; the constraint includes any one of the following: the CFR fluctuation value corresponding to BWP is less than the first threshold value; the CFR fluctuation value corresponding to BWP is greater than or equal to the first threshold value and less than or equal to the second threshold value; the CFR fluctuation value corresponding to BWP is greater than the second threshold value.

[0028] According to the second aspect, or any implementation of the second aspect above, the union of the BWPs of the N first signals in the frequency domain includes the entire bandwidth of the channel.

[0029] According to the second aspect, or any implementation of the second aspect above, after transmitting each of the N first signals via frequency hopping, the method further includes: receiving the Type A characteristic QCL-Type A of the quasi-co-address QCL of the BWP of each first signal, wherein the QCL-Type A of the BWP of each first signal is determined by the terminal device based on each first signal; and multiplexing the QCL characteristic of the BWP of each first signal to the quasi-co-address reference signal associated with each first signal based on the QCL-Type A of the BWP of each first signal, wherein the quasi-co-address reference signal associated with each first signal has a QCL relationship with each first signal.

[0030] According to the second aspect, or any implementation of the second aspect above, the quasi-co-located reference signal includes a tracking reference signal TRS and / or a channel state information reference signal CSI-RS; according to the QCL-TypeA of the BWP of each first signal, the QCL characteristics of the BWP of each first signal are multiplexed for the quasi-co-located reference signal associated with each first signal, including: multiplexing the QCL-Type A corresponding to each first signal for the TRS associated with each first signal, multiplexing QCL-Type A for the CSI-RS associated with each first signal, and / or, multiplexing the frequency offset information in the Type B characteristic QCL-Type of the QCL provided by the TRS associated with each first signal for each first signal.

[0031] According to the second aspect, or any implementation of the second aspect above, after transmitting each of the N first signals by frequency hopping, the method further includes: receiving channel measurement results.

[0032] The second aspect and any implementation thereof correspond to the first aspect and any implementation thereof, respectively. The technical effects of the second aspect and any implementation thereof are similar to those of the first aspect and any implementation thereof, and will not be repeated here.

[0033] Thirdly, embodiments of this application provide a communication device, which includes: a channel measurement unit, configured to acquire the channel frequency response (CFR) fluctuation value corresponding to the bandwidth portion (BWP) of each of N first signals, wherein N is an integer greater than 1, the N first signals are respectively carried in N time-domain units, and the BWP of the first signals carried in any two closest time-domain units partially overlap or do not overlap in the frequency domain, the N CFR fluctuation values ​​are used to determine the channel measurement result, and the first signals include a demodulation reference signal (DMRS) and / or a data signal.

[0034] The third aspect or any implementation thereof can refer to the first aspect. The communication device provided in the third aspect can be a terminal device, or a device, module, circuit, or chip configured in the terminal device, or a device that can be used in conjunction with the terminal device. In one design, the communication device may include modules corresponding to each of the methods / operations / steps / actions described in the first aspect. The module may be a hardware circuit, software, or a combination of hardware circuit and software. In one design, the communication device may include a communication module and a processing module. The communication module is used to perform the sending and reporting actions in the method described in the first aspect above, and the processing module is used to perform the processing actions in the method described in the first aspect above.

[0035] Fourthly, embodiments of this application provide a communication device, which includes: a signal transmitting unit, configured to transmit each of N first signals via frequency hopping, wherein N is an integer greater than 1, the N first signals are respectively carried in N time-domain units, the bandwidth portions (BWP) of the first signals carried in the two closest time-domain units partially overlap or do not overlap in the frequency domain, and the channel frequency response (CFR) fluctuation values ​​corresponding to the BWPs of the N first signals are used by a terminal device to obtain channel measurement results, wherein the first signals include a demodulation reference signal (DMRS) and / or a data signal.

[0036] The fourth aspect, or any implementation thereof, refers to the second aspect above. The communication device provided in the fourth aspect can be a network device, or a device, module, circuit, or chip configured in a network device, or a device compatible with a network device. In one design, the communication device may include modules corresponding to each of the methods / operations / steps / actions described in the second aspect. These modules may be hardware circuits, software, or a combination of hardware circuits and software. In one design, the communication device may include a communication module and a processing module. The communication module is used to perform the receiving and sending actions in the method described in the second aspect above, and the processing module is used to perform the processing actions in the method described in the second aspect above.

[0037] Fifthly, a communication device is provided, including a processor and a storage medium storing instructions that, when executed by the processor, cause the methods of the first aspect or any possible implementation thereof to be implemented, and cause the methods of the second aspect or any possible implementation thereof to be implemented.

[0038] Sixthly, a chip is provided, including a processor for executing a program or instructions to cause methods as described in the first aspect, any possible implementation of the first aspect, the second aspect, and any possible implementation of the second aspect to be implemented. Optionally, the chip may further include a memory for storing the program or instructions. Optionally, the chip may further include a transceiver.

[0039] A seventh aspect provides a computer-readable storage medium including instructions that, when executed by a processor, cause the methods of the first aspect, any possible implementation of the first aspect, the second aspect, and any possible implementation of the second aspect to be implemented.

[0040] Eighthly, a computer program product is provided, the computer program product including computer program code or instructions, which, when executed, cause the methods in the first aspect, any possible implementation of the first aspect, the second aspect, and any possible implementation of the second aspect to be implemented.

[0041] Ninth aspect, a communication system is provided, the communication system comprising one or more of the following means: a communication means for performing the first aspect, any possible implementation of the first aspect, the second aspect, and any possible implementation of the second aspect. Attached Figure Description

[0042] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1a This is an example diagram of fixed-frequency signal transmission;

[0044] Figure 1b This is one of the example diagrams for frequency hopping transmission of signals;

[0045] Figure 1c This is one of the example diagrams for frequency hopping transmission of signals;

[0046] Figure 1d This is one of the example diagrams for frequency hopping transmission of signals;

[0047] Figure 1e This is one of the example diagrams for frequency hopping transmission of signals;

[0048] Figure 2 This is one of the architectural example diagrams of the communication system provided in the embodiments of this application;

[0049] Figure 3 This is one of the architectural example diagrams of the communication system provided in the embodiments of this application;

[0050] Figure 4 This is one of the architectural example diagrams of the communication system provided in the embodiments of this application;

[0051] Figure 5 This is one of the architectural example diagrams of the communication system provided in the embodiments of this application;

[0052] Figure 6 This is one of the flowchart examples of a channel measurement method provided in the embodiments of this application;

[0053] Figure 7a This is one of the example diagrams of frequency hopping transmission of the first signal provided in the embodiments of this application;

[0054] Figure 7b This is one of the example diagrams of frequency hopping transmission of the first signal provided in the embodiments of this application;

[0055] Figure 8 This is one of the flowchart examples of a channel measurement method provided in the embodiments of this application;

[0056] Figure 9 This is an example diagram of the channel frequency response of each subcarrier within each BWP provided in the embodiments of this application;

[0057] Figure 10 This is an example diagram of QCL relationships and QCL feature sharing provided in the embodiments of this application;

[0058] Figure 11 This is an example diagram illustrating the sensing performance of a sensing service based on a channel measurement method provided in an embodiment of this application;

[0059] Figure 12 This is an example diagram illustrating the communication performance of a communication service based on a channel measurement method provided in an embodiment of this application;

[0060] Figure 13 This is one of the example diagrams of the frame structure of the communication device provided in the embodiments of this application;

[0061] Figure 14 This is one of the example diagrams of the frame structure of the communication device provided in the embodiments of this application;

[0062] Figure 15 This is one of the example diagrams of the frame structure of the communication device provided in the embodiments of this application;

[0063] Figure 16 This is one of the example diagrams of the frame structure of the communication device provided in the embodiments of this application. Detailed Implementation

[0064] The technical solutions in the embodiments of this application will be described below with reference to the accompanying drawings. It is understood that in this application, the indication includes direct indication (also called explicit indication) and implicit indication. Direct indication information A refers to information A; implicit indication information A refers to indicating information A through the correspondence between information A and information B and the direct indication information B. The correspondence between information A and information B can be predefined, pre-stored, pre-burned, or pre-configured.

[0065] It is understood that in this application, information C is used to determine information D, including both situations where information D is determined solely based on information C and situations where it is determined based on information C and other information. Furthermore, information C can also be used to determine information D indirectly, for example, where information D is determined based on information E, and information E is determined based on information C.

[0066] Furthermore, in the embodiments of this application, "network element A sends information A to network element B" can be understood as network element B being the destination of information A or an intermediate network element in the transmission path between the destination and network element B, which may include sending information directly or indirectly to network element B. "Network element B receives information A from network element A" can be understood as network element A being the source of information A or an intermediate network element in the transmission path between the source and network element A, which may include receiving information directly or indirectly from network element A. Information may undergo necessary processing between the source and destination, such as format changes, but the destination can understand the valid information from the source. Similar expressions in this application can be understood in a similar way and will not be elaborated further here.

[0067] In this article, the term "and / or" is merely a description of the positional relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0068] The terms "first" and "second," etc., used in the specification and claims of this application are used to distinguish different objects, not to describe a specific order of objects. For example, "first target object" and "second target object," etc., are used to distinguish different target objects, not to describe a specific order of target objects.

[0069] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0070] In the description of the embodiments in this application, unless otherwise stated, "multiple" means two or more. For example, multiple processing units means two or more processing units; multiple systems means two or more systems.

[0071] To facilitate understanding of this embodiment, some technical terms and background technologies involved in this embodiment will be introduced first:

[0072] (1) Frequency hopping (or hopping): A spread spectrum communication technique in which the transmitting and receiving parties can synchronously change the center frequency of the carrier during communication. Within a given frequency band, the carrier frequency jumps according to a specific sequence, much like jumping between multiple frequency "stations". The principle is that the transmitting end uses a pseudo-random code sequence to control the carrier center frequency hopping, modulating the information to be transmitted onto the hopping carrier. The receiving end has the same pseudo-random code sequence and is synchronized with the transmitting end, so it can correctly demodulate the signal. It is understood that frequency hopping transmission in this application refers to signal transmission (e.g., signal transmission or signal reception) in a frequency hopping manner. For example, a first frequency band is used for signal transmission in the first time domain unit, and a second frequency band is used for signal transmission in the second time domain unit. The first frequency band and the second frequency band may partially overlap, or they may not overlap. It is understood that the frequency domain bandwidth of the first frequency band may be the same as that of the second frequency band.

[0073] For example, Figure 1a This is an example diagram of fixed-frequency signal transmission. Figure 1b This is one of the example diagrams for frequency hopping transmission of signals. Figure 1c This is one of the example diagrams for frequency hopping transmission of signals. Figure 1d This is one of the example diagrams for frequency hopping transmission of signals. Figure 1e This is one of the example diagrams for frequency hopping transmission of signals. For example... Figures 1a to 1eAs shown, a resource unit is used to carry the signal to be transmitted. A resource unit consists of a time-domain unit and a corresponding frequency-domain unit. For example, when the resource unit is an RE, its corresponding time-domain unit is an orthogonal frequency division multiplexing (OFDM) symbol, and its corresponding frequency-domain unit is the frequency-domain bandwidth of the RE (or, in other words, the subcarrier spacing). For instance, the frequency-domain unit can be the bandwidth of the RE, the bandwidth of a resource block (RB), etc.; the time-domain unit can be a symbol (such as an OFDM symbol), a time slot (or mini-slot)), a subframe, or a frame, etc. When the frequency-domain unit is the bandwidth of the RE, the corresponding time-domain unit is a symbol (e.g., an OFDM symbol). When the frequency-domain unit is the bandwidth of the RB, the corresponding time-domain unit can be a symbol, time slot, subframe, or frame, etc., and this application does not limit this. The following example uses a bandwidth with a frequency domain unit of RE and a corresponding time domain unit of OFDM symbol (i.e., a resource unit of RE) to illustrate the characteristics of frequency hopping transmission of signals.

[0074] Figures 1a-1e In the diagram, the resource units in the darker areas of each time domain unit are used to carry the first signal.

[0075] See also Figure 1a In fixed-frequency signal transmission, the frequency domain resources occupied by the first signal in each time domain unit are fixed (e.g., the frequency domain resources occupied in each time domain unit are always frequency domain units numbered 10 to 12). In each time domain unit, the frequency domain unit numbered 10 is the starting position of the bandwidth of the RE in the frequency domain, and the frequency domain unit numbered 12 is the ending position of the bandwidth of the RE in the frequency domain. In this method, the equivalent bandwidth of the first signal is the frequency domain units numbered 10 to 12. The equivalent bandwidth can be understood as the union of the frequency domain resources occupied by the data in multiple time domain units. A union refers to merging all elements from at least two sets to form a new set, which contains all elements that have appeared in at least two sets, but without repetition.

[0076] See also Figure 1b To improve communication and sensing performance, frequency hopping technology can be used, which involves transmitting signals in a frequency-hopping manner to increase the effective bandwidth occupied by the transmission. Through frequency hopping, the frequency domain resources occupied by the first signal in the time domain are widened, thus allowing the bandwidth of the first signal to include multiple bandwidth parts (BWPs), i.e., the effective bandwidth of the first signal is widened. For example... Figure 1bAs shown, the time domain unit 0 occupies frequency domain units numbered 10 to 12, the time domain unit 1 occupies frequency domain units numbered 7 to 9, and the time domain unit 2 occupies frequency domain units numbered 4 to 6. Specifically, in the time domain unit 0, the bandwidth of the RE starts at frequency unit number 10 and ends at frequency unit number 12. In the time domain unit 1, the bandwidth of the RE starts at frequency unit number 7 and ends at frequency unit number 9. In the time domain unit 2, the bandwidth of the RE starts at frequency unit number 4 and ends at frequency unit number 6. That is, at this point, the equivalent bandwidth of the first signal includes 9 frequency domain units: frequency units numbered 4 to 12. Figure 1a The equivalent bandwidth of the first signal comprises three frequency domain units: frequency domain units numbered 10 to 12. It is evident that frequency hopping transmission can broaden the equivalent bandwidth of the signal in the frequency domain. In one example, for instance… Figure 1b In this context, assuming the BWP corresponding to time-domain unit number 0 is BWP0, the BWP corresponding to time-domain unit number 1 is BWP1, and the BWP corresponding to time-domain unit number 2 is BWP2, the values ​​of these multiple BWPs (i.e., BWP0, BWP1, BWP2), i.e., the frequency bandwidth of BWPs, can be the same. For example, Figure 1b BWP0, BWP1, and BWP2 occupy different frequency bands (for example, the frequency of the frequency band occupied by BWP0 is higher than the frequency of the frequency band occupied by BWP1), but the frequency bandwidths corresponding to BWP0, BWP1, and BWP2 are the same, which are the bandwidths corresponding to the three frequency domain units.

[0077] In the above frequency hopping transmission, any two closest time-domain units can be continuous or discontinuous in the time domain. For example, Figure 1b Time-domain cell number 0 is closest to time-domain cell number 1, and these two time-domain cells are continuous in the time domain; time-domain cell number 1 is closest to time-domain cell number 2, and these two time-domain cells are continuous in the time domain. For example, as... Figure 1c As shown, time-domain cell number 0 is closest to time-domain cell number 2, but these two time-domain cells are not discontinuous in the time domain. Similarly, time-domain cell number 2 is closest to time-domain cell number 4, but these two time-domain cells are also not discontinuous in the time domain. In another example, such as... Figure 1d As shown, the time domain unit numbered 0 is closest to the time domain unit numbered 1, and these two time domain units are continuous in the time domain; the time domain unit numbered 1 is closest to the time domain unit numbered 2, and these two time domain units are discontinuous in the time domain.

[0078] The aforementioned frequency hopping transmission can be periodic frequency hopping, that is, frequency hopping is performed according to the same frequency hopping pattern in each frequency hopping cycle. For example, such as... Figure 1e As shown, assuming the frequency hopping period is the duration occupied by the three time-domain units in the time domain, taking the frequency hopping method as an example where each time-domain unit is continuous in the time domain and the frequency bandwidth of the BWP corresponding to each time-domain unit is the same as the bandwidth corresponding to the three frequency-domain units, the time-domain units numbered 0 to 2 are transmitted in the first frequency hopping period, and the time-domain units numbered 3 to 5 are transmitted in the second frequency hopping period.

[0079] It is understandable that the above Figures 1a to 1e The serial numbers and number of frequency domain units and time domain units corresponding to resource units are for illustrative purposes only. This application does not impose any restrictions on the specific number and serial numbers of frequency domain units and time domain units corresponding to resource units. Figure 1e The frequency hopping period and frequency hopping method mentioned are merely examples, and this application does not impose any restrictions on the frequency hopping period or the frequency hopping method within each frequency hopping period. Furthermore, for ease of understanding, the following descriptions of the channel measurement method provided in this application will use a bandwidth with a frequency domain unit of RE and a corresponding time domain unit as the symbol.

[0080] (2) Orthogonal Frequency Division Multiplexing (OFDM): A communication system divides a wide-frequency carrier into multiple mutually orthogonal subcarriers with smaller bandwidths, and uses these subcarriers to transmit and receive signals. An OFDM symbol is composed of a set of subcarriers carrying a modulated signal superimposed on each other.

[0081] (3) Subcarrier spacing: refers to the difference between the center frequencies of two adjacent subcarriers in a communication system that uses subcarrier technology (such as an orthogonal frequency division multiplexing OFDM system). For example, the bandwidth of a subcarrier is usually fixed at 15kHz. In some special scenarios, such as some configurations of new wireless systems, the subcarrier spacing can have different values, such as 30kHz, 60kHz, 120kHz, and 240kHz.

[0082] (4) Bandwidth part (BWP): This is a specific continuous sub-bandwidth obtained by dividing the bandwidth of a carrier in a wireless communication system. A carrier can be divided into multiple BWPs, and each BWP has an independent set of parameters, such as subcarrier spacing and cyclic prefix length.

[0083] (5) Resource Element (RE): In orthogonal frequency division multiplexing (OFDM) systems such as Long Term Evolution (LTE) and 5th generation mobile communication technology (5G), the resource element (RE) is the smallest unit of physical resources. One RE occupies one subcarrier in the frequency domain and one OFDM symbol in the time domain. From a frequency domain perspective, the frequency bandwidth of one RE is the width of one subcarrier.

[0084] (6) Channel State Information-Reference Signal (CSI-RS): Used for downlink channel information acquisition, including channel state information acquisition, beam management, time-frequency tracking, mobility management, etc. Specifically:

[0085] Acquire channel state information: Used to measure the channel between the base station and the UE, and to obtain the channel state information required for scheduling and link adaptation, such as precoding matrix, channel quality information, etc.

[0086] Beam management: Used to obtain beamforming weights for UE and base station sides, and supports beam measurement during beam management.

[0087] Time-frequency tracking: Used for precise time-frequency synchronization tracking to obtain quasi-colocation (QCL) parameters.

[0088] Mobility management: Used to perform measurements related to mobility management.

[0089] CSI-RS is a signal periodically transmitted by network devices, such as base stations, in specific resource blocks. User equipment (UE) receives these signals, analyzes them against known reference signals to estimate channel quality, and reports the estimation results to the base station. The base station then adjusts transmission parameters, such as power control and modulation schemes, based on this information to optimize link quality.

[0090] Depending on the power configuration, CSI-RS can be divided into two types: non-zero-power CSI-RS (NZP CSI-RS) and zero-power CSI-RS (ZP CSI-RS). NZP CSI-RS includes: CSI-RS for channel measurement (CSI-RS for CM); CSI-RS for beam measurement and reporting during beam management (CSI-RS for BM); a tracking reference signal (TRS) used by the UE for precise time-frequency synchronization; and CSI-RS for mobility measurement. ZP CSI-RS is mainly used for PDSCH rate matching.

[0091] (7) Demodulation reference signal (DMRS): This refers to the channel estimation reference signal, which is used to estimate the channel. The receiver can use the channel information estimated by the DMRS to demodulate the data and complete the data transmission.

[0092] (8) Data signals: In a communication system, data signals are physical quantities such as electrical or optical signals used to represent and transmit data information. Data signals carry various types of data, such as text, images, audio, and video, enabling information to be effectively transmitted between different devices.

[0093] (9) Channel Frequency Response (CFR): This describes the response characteristics of a wireless channel to signals of different frequencies, i.e., the amplitude gain and phase shift of the channel in response to each frequency component of the input signal. The transmitter can precode based on the channel frequency response, appropriately weighting signals of different frequencies to compensate for amplitude and phase changes caused by the channel, thus improving the reliability of signal transmission. The receiver can use the channel frequency response for equalization, eliminating inter-symbol interference and recovering the original signal. For example, in an Orthogonal Frequency Division Multiplexing (OFDM) system, by estimating the channel frequency response, data can be allocated to subcarriers with better channel characteristics for transmission, effectively improving the system's anti-fading capability and spectral efficiency.

[0094] (10) Quasi-co-location (QCL): If the channel characteristics acting on a symbol at one antenna port can be derived from those at another antenna port, then the QCLs of these two ports are considered valid. Channel estimation results obtained from one port can be used for the other port. It is understood that reference signals at different ports of an antenna can reuse parameters. QCL includes various characteristics, such as QCL-Type A, QCL-Type B, QCL-Type C, and QCL-Type D, specifically:

[0095] QCL-TypeA: Used to provide a more comprehensive description of the target channel, including Doppler shift, Doppler spread, average delay, and delay spread. This characteristic can be in the form of {doppler shift, doppler spread, average delay, delay spread}, allowing the UE to obtain a comprehensive description of the DMRS characteristics to estimate the channel and demodulate the data.

[0096] QCL-TypeB: Used for low-frequency digital beamforming. After beamforming, the Doppler shift and Doppler spread can be carried over compared to the reference signal (wide beam), while the time delay characteristics are likely to be different. The form of this characteristic can be, for example, {dopplershift,doppler spread}.

[0097] QCL-TypeC: Used to inherit Doppler frequency shift and average delay characteristics from the reference signal for further precise time-frequency domain synchronization (UE initial access is based on SSB for time-frequency domain synchronization, and subsequent synchronization can be performed using a more precise tracking reference signal (TRS)). The form of this characteristic can be, for example, {average delay, doppler shift}.

[0098] QCL-TypeD: Inherits beam information from the reference signal. This characteristic can be in the form of, for example, {Spatial Rxparameter}.

[0099] (11) The synchronization signal block (PBCH block, SSB) is information used in communication systems, especially in modern wireless communication systems such as 5G, to achieve synchronization between devices. This synchronization includes time synchronization and frequency synchronization. Time synchronization allows the receiving device to determine the precise time of signal arrival, thereby accurately identifying the location of data in the time domain. Frequency synchronization helps the receiving device adjust its own frequency to match the signal frequency of the transmitting end, ensuring correct demodulation of the signal.

[0100] (12) Tracking Reference Signal (TRS): A reference signal used to assist user equipment (UE) in accurately estimating and tracking the radio channel. When a terminal (UE) receives downlink data transmission, it can use the TRS to track and compensate for time and frequency offsets (deviations). In NR systems, the TRS is a type of CSI-RS.

[0101] (13) Integrated Sensing and Communication (ISAC): This refers to a device that transmits wireless signals with both sensing and communication capabilities. The communication requirement can be simply understood as sending information from the transmitter to the receiver. The sensing requirement can be simply understood as sensing the surrounding environment, the speed of moving objects, and / or distance, etc. ISAC is widely considered a key application scenario for next-generation wireless communication (e.g., 6th generation mobile communication technology, 6G). It is understandable that integrated sensing and communication can also be called joint communications and sensing (JCAS / ICAS), or simply integrated sensing and communication.

[0102] To facilitate understanding, the channel measurement methods of current wireless communication systems are illustrated below with examples.

[0103] Taking an NR system as an example, the base station sends CSI-RS to the terminal device. The terminal device receives the CSI-RS and measures it to obtain the measurement results of the channel between the base station and the terminal device, such as channel state information. The terminal device then reports the channel state information to the network device, which configures the channel for the terminal device to transmit wireless signals based on the received channel state information. In practical applications, there are often scenarios where bandwidth is limited or higher efficiency is required, making it impossible to configure CSI-RS. The aforementioned channel measurement method requires configuring a dedicated CSI-RS for channel measurement, thus limiting the channel measurement to the application scenario.

[0104] To address the aforementioned issues, considering the existence of signals in the physical downlink shared channel (PDSCH) of wireless communication systems that are not limited by application scenarios, such as data signals and DMRS, the following approach is adopted. When a base station transmits data to a terminal device via a data signal, the data signal is known to the base station. Therefore, the base station can utilize the echo signal of this data signal for sensing, i.e., sensing the surrounding environment through a single-base station (mono-static, meaning the transmitter and receiver are located in the same location). The same applies to reference signals. In other words, regardless of whether the transmitted signal is a data signal or a reference signal (such as DMRS), the base station can perform sensing through the echo signal of the transmitted signal. Furthermore, by utilizing enhanced sensing techniques, such as frequency hopping in the time domain, better sensing and communication performance can be achieved.

[0105] Based on the above analysis, this application provides a channel measurement method that utilizes DMRS and / or data signals in the PDSCH combined with frequency hopping transmission to achieve channel measurement, thereby solving the problem of application scenario limitations when using CSI-RS for channel measurement. This method uses frequency hopping transmission to transmit a first signal across multiple time-domain units (two or more), where the frequency domain positions (or BWPs) corresponding to any two closest time-domain units (which can be consecutive or discontinuous) are different, i.e., partially overlapping or non-overlapping. In this way, the bandwidth of the multiple first signals is broadened to the union of the frequency domain positions (or BWPs) corresponding to each time-domain unit. Based on this, assuming the first signal carried in any time-domain unit is #n first signal, for example, the first signal #1 is carried in the first time-domain unit, the first signal #2 is carried in the second time-domain unit, ..., and the first signal #N is carried in the Nth time-domain unit, then the signals used for channel measurement include the first signals transmitted in each time-domain unit, that is, the signals used for channel measurement include the first signal #1, the first signal #2, ..., the first signal #N, where N is an integer greater than 1. Thus, by obtaining the CFR fluctuation value within the BWP corresponding to the first signal carried in each time-domain unit, it can be guaranteed that these CFR fluctuation values ​​can be used to determine the channel measurement results. Furthermore, the first signal includes DMRS and / or data signals. DMRS is used by the terminal device to demodulate data to complete data transmission and estimate the channel, and the data signal is used to transmit data. Both are signals in the physical downlink channel of wireless communication that are not limited by any particular scenario, thereby enabling channel measurement that is not limited by any application scenario.

[0106] Before describing the technical solutions of the embodiments of this application, the application platform of the channel measurement method of the embodiments of this application will be described first with reference to the accompanying drawings.

[0107] The embodiments of this application can be applied to communication systems that enable satellite-terminal communication. For example, Figure 2 This is one of the architectural example diagrams of the communication system provided in the embodiments of this application. For example... Figure 2 As shown, the communication system may include satellite base stations and network elements of various terminal types. The satellite base station can be considered a network device that provides communication services to terminal devices, such as smartphones, smartwatches, and tablets. The satellite base station transmits downlink data to the terminal; the terminal transmits uplink data to the satellite base station.

[0108] The embodiments of this application can be applied to inter-satellite communication systems. For example, Figure 3 This is one of the architectural example diagrams of the communication system provided in the embodiments of this application. For example... Figure 3 As shown, inter-satellite links, also known as inter-satellite communication, such as in a communication system between satellites AS1 and AS2, typically consist of two main parts: a communication subsystem and an Advanced Payload Technology (APT) subsystem. The communication subsystem is responsible for transmitting inter-satellite information and is the core of the inter-satellite communication system. The APT subsystem is responsible for acquisition, alignment, and tracking between satellites. Acquisition determines the direction of arrival of the incident signal, alignment adjusts the transmitted wave to aim at the receiving direction, and tracking continuously adjusts alignment and acquisition throughout the communication process. It is understandable that... Figure 3 The satellites mentioned are merely examples; the communication system may include more satellites communicating with each other. This application does not limit the number of satellites in its embodiments, and the specific number can be set according to application requirements. It is understood that in this communication system, the satellite responsible for providing communication services can be considered a network device, and the satellite receiving the communication service can be considered a terminal device.

[0109] The embodiments of this application can be applied to cellular network communication systems. For example, 5G or 5th Generation New Radio (NR) systems, wireless local area network (WLAN) systems, satellite communication systems, or future communication systems such as 6th generation (6G) mobile communication systems, or converged systems of multiple cellular networks. The technical solutions provided in this application can also be applied to device-to-device (D2D) communication, vehicle-to-everything (V2X) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), and Internet of Things (IoT) cellular network communication systems.

[0110] In a cellular network, one network element can send signals to or receive signals from another network element. These signals can include information, signaling, or data. The term "network element" can also be replaced by an entity, network entity, device, communication device, communication module, node, communication node, etc. This disclosure uses a network element as an example. For instance, a cellular network can include at least one terminal device and at least one network device. The network device can send downlink signals to the terminal device, and / or the terminal device can send uplink signals to the network device. It is understood that the terminal device in this disclosure can be replaced by a first network element, and the network device can be replaced by a second network element, both performing the corresponding channel measurement methods described in this disclosure.

[0111] In the embodiments of this application, the terminal device may also be referred to as user equipment (UE), access terminal, subscriber unit, user station, mobile station (MS), mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent, or user device.

[0112] Terminal devices can be devices that provide voice / data, such as handheld devices with wireless connectivity, in-vehicle devices, etc. Examples of terminal devices currently include: mobile phones, smartphones, tablets, laptops, handheld computers, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving cars, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, wireless data cards, personal digital assistants (PDAs), handsets with wireless communication capabilities, and laptops. The embodiments of this application do not limit this to computers, computing devices or other processing devices connected to wireless modems, wearable devices, terminal devices in 5G networks or terminal devices in future evolved public land mobile networks (PLMNs).

[0113] By way of example and not limitation, in this embodiment, the terminal device can also be a wearable device. Wearable devices, also known as wearable smart devices, are a general term for devices that utilize wearable technology to intelligently design and develop everyday wearables, such as glasses, gloves, watches, clothing, and shoes. Wearable devices are portable devices that are worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not merely hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include those that are feature-rich, large in size, and can achieve complete or partial functions without relying on a smartphone, such as smartwatches or smart glasses, as well as those that focus on a specific type of application function and require the use of other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0114] In this embodiment, the device for implementing the functions of the terminal device can be the terminal device itself, or it can be any device capable of supporting the terminal device in implementing those functions, such as a chip system. This device can be installed in or used in conjunction with the terminal device. In this embodiment, the chip system can be composed of chips or may include chips and other discrete components. This embodiment only uses the terminal device as an example to illustrate the device for implementing the functions of the terminal device, and does not constitute a limitation on the solution of this embodiment.

[0115] The network device in this application embodiment is a device deployed in a wireless access network or wireless local area network to provide wireless communication functions for terminal devices. The network device may include various forms of base stations, relay stations, access points, etc. In systems employing different wireless access technologies, the name of the network device may differ; for example, a base transceiver station (BTS) in a Global System for Mobile Communication (GSM) or Code Division Multiple Access (CDMA) network. The network device can also be a wireless controller in a cloud radio access network (CRAN) scenario. The network device can also be a base station device in a future 5G network or a network device in a future evolved PLMN network. The network device can also be a wearable device or an in-vehicle device. The network device can also be a transmission and reception point (TRP). The term "base station" can broadly encompass or replace various names listed below, such as: Node B (NB) in Wideband Code Division Multiple Access (WCDMA), Evolved Node B (eNB) in Long Term Evolution (LTE), Next Generation Node B (gNB), Relay Station, Access Point, Transmitting and Receiving Point (TRP), Transmitting Point (TP), Master Station, Auxiliary Station, Motor Slide Retainer (MSR) Node, Home Base Station, Network Controller, Access Node, Wireless Node, Access Point (AP), Transmitting Node, Transceiver Node, Baseband Unit (BBU), Remote Radio Unit (RRU), Active Antenna Unit (AAU), Remote Radio Head (RRH), Central Unit (CU), Distributed Unit (DU), Radio Unit (RFU). Base stations can be macro base stations, micro base stations (also known as small stations), relay nodes, donor nodes, or similar entities, or combinations thereof.A base station can also refer to a communication module, modem, or chip installed within the aforementioned equipment or apparatus. A base station can also be a mobile switching center, equipment performing base station functions in D2D, V2X, and M2M communications, network-side equipment in 6G networks, and equipment performing base station functions in future communication systems. A base station can support networks using the same or different access technologies. Optionally, a RAN node can also be a server, wearable device, vehicle, or in-vehicle equipment. For example, the access network equipment in vehicle-to-everything (V2X) technology can be a roadside unit (RSU). The embodiments of this application do not limit the specific technologies or equipment forms used in the network equipment.

[0116] In this application embodiment, the device for implementing the function of the network device can be the network device itself; it can also be a device capable of supporting the network device in implementing the function, such as a chip system, hardware circuit, software module, or hardware circuit plus software module. This device can be installed in the network device or used in conjunction with the network device. In this application embodiment, only the network device is used as an example to illustrate the device for implementing the function of the network device, and this does not constitute a limitation on the solution of the application embodiment. In this application embodiment, the chip system can be composed of chips, or it can include chips and other discrete devices.

[0117] Network devices and / or terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can also be deployed in the air on airplanes, balloons, and satellites. This application does not limit the scenario in which the network devices and terminal devices are located. Furthermore, terminal devices and network devices can be hardware devices, or software functions running on dedicated hardware or general-purpose hardware, such as virtualization functions instantiated on a platform (e.g., a cloud platform), or entities that include dedicated or general-purpose hardware devices and software functions. This application does not limit the specific form of the terminal devices and network devices.

[0118] For example, Figure 4 This is one of the architectural example diagrams of the communication system provided in the embodiments of this application. For example... Figure 4 As shown, the communication system may include network devices such as gNBs or base stations and terminal devices such as UE1 to UE4. In this communication system, the base station can send downlink data to terminal devices UE1 to UE4, and terminal devices UE1 to UE4 can also send uplink data to the base station. This application embodiment does not limit the number of base stations and terminal devices, and can set them according to application requirements. For example, one base station can serve multiple terminals, or multiple base stations can serve one terminal device.

[0119] For example, Figure 5 This is one of the architectural example diagrams of the communication system provided in the embodiments of this application. For example... Figure 5 As shown, a wireless local area network (WLAN) communication system may include one or more access points and one or more terminal devices. An access point can also be called a network device. Specifically, one access point can serve multiple terminal devices, or multiple access points can serve one terminal device.

[0120] It should be noted that, Figures 2 to 5 This is a simplified illustration for ease of understanding only. For example, the communication system may also include other devices, such as wireless relay devices and / or wireless backhaul devices. Figures 2 to 5 The figures are not shown. In practical applications, this communication system may include multiple network devices or multiple terminal devices. This application does not limit the specific number of network devices and terminal devices included in the communication system.

[0121] The following is combined Figures 6 to 12 The channel measurement method provided in the embodiments of this application will be described in detail.

[0122] For example, Figure 6 This is one of the flowchart examples of a channel measurement method provided in an embodiment of this application. For example... Figure 6 As shown, the channel measurement method may include:

[0123] S601, the network device transmits a first signal carried in each of the N time-domain units by frequency hopping. The first signal includes a demodulation reference signal DMRS and / or a data signal.

[0124] Where N is an integer greater than 1. The network device transmits N first signals via frequency hopping, and these N first signals are carried in N time-domain units, that is, each time-domain unit carries one first signal. The frequency hopping transmission of the first signals in this embodiment can refer to the above. Figures 1b to 1e In the embodiment, the frequency hopping transmission of the first signal, further, Figure 6 In this embodiment, the first signal includes DMRS and / or data signals in different time domains, and the first signal is transmitted by the network device. For the same parts, please refer to the above. Figures 1b to 1e The existing descriptions in the embodiments will not be repeated here. For ease of understanding, further exemplary descriptions are provided below.

[0125] When a network device transmits a first signal via frequency hopping, frequency hopping ensures that the network device transmits one first signal in each of N time-domain units. For example, Figure 7a This is one of the example diagrams of frequency hopping transmission of the first signal provided in the embodiments of this application. For example... Figure 7aAs shown, the time-domain unit can be a symbol (such as an OFDM symbol). The network device transmits the first signal #1 in symbol S1, the first signal #2 in symbol S2, the first signal #3 in symbol S3, ... and the first signal #N in symbol SN by frequency hopping.

[0126] Understandable, Figure 7a The four frequency domain units of the first signal are merely an example. In specific applications, the number of frequency domain units for each first signal can be two, three, five, or more. The specific number can be set according to application requirements. This application embodiment does not limit the number of frequency domain units for the first signal. The number of frequency domain units must be at least two to achieve frequency hopping transmission of the first signal. For example, assuming that the number of time domain units for each first signal is two, and... Figure 7a Similarly, the first signal #1 starts at frequency unit number 70 and ends at frequency unit number 71 in the frequency domain. After frequency hopping, the first signal #2 starts at frequency unit number 71 and ends at frequency unit number 72 in the frequency domain. The first signal #3 starts at frequency unit number 72 and ends at frequency unit number 73 in the frequency domain. ... and the first signal #N starts at frequency unit number m and ends at frequency unit number m+1 in the frequency domain.

[0127] When a network device transmits the first signal carried by each of the N time-domain units through frequency hopping, each first signal occupies a BWP in the frequency domain. Different first signals occupy different BWPs, and the BWPs of the first signals carried by any two closest time-domain units partially overlap or do not overlap in the frequency domain, thereby ensuring the effect of spread spectrum.

[0128] Here, assuming that any two closest time-domain units are considered as a group of time-domain units, then the partial overlap of the BWP of the first signal carried by any two closest time-domain units in the frequency domain can include partial overlap between the BWPs of the first signal carried by one or more groups (two or more groups) of time-domain units among N BWPs. For example, it could be... Figure 7a As shown, the frequency domain units numbered 75 to 77 in BWP2 and BWP3 of the first signal carried by the time domain units of symbols S1 and S2 overlap, while the frequency domain unit numbered 74 in BWP2 and the frequency domain unit numbered 78 in BWP3 do not overlap. In specific applications, the number of partially overlapping BWPs among N BWPs can be three or more, and the number of overlapping frequency domain units can be one or more, which can be set according to requirements. This application embodiment does not impose any restrictions on this.

[0129] The fact that the frequency-domain non-overlapping BWPs of the first signals carried by any two closest time-domain units can include portions where the BWPs of each first signal do not overlap with each other. For example, Figure 7b This is one of the example diagrams of frequency hopping transmission of the first signal provided in the embodiments of this application. For example... Figure 7b As shown, BWP1 includes frequency domain units numbered 70 to 73, BWP2 includes frequency domain units numbered 74 to 77, BWP3 includes frequency domain units numbered 78 to 81, ..., BWPN includes frequency domain units numbered m to m+3. The first signals carried by any two closest time domain units of these BWPs do not have overlapping frequency domain units. In other words, the first signal BWPs carried by any two closest time domain units do not have overlapping BWPs. This is understandable. Figure 7b and the above Figure 7a Similar, the difference lies in Figure 7b The BWPs of the first signals carried by any two closest time-domain units do not overlap in the frequency domain. For the same part, please refer to [reference needed]. Figure 7a The descriptions already provided in the embodiments will not be repeated here.

[0130] It is understandable that, assuming the BWPs of the first signals carried by any two closest time-domain units are called the second BWPs, and the second BWPs partially overlap or do not overlap in the frequency domain, and the BWPs other than the second BWPs among the N BWPs are called the third BWPs, then there can exist at least one set of third BWPs that completely overlap in the frequency domain. For example, in Figure 1e BWP0 and BWP3 completely overlap in the frequency domain, BWP1 and BWP4 completely overlap in the frequency domain, and BWP2 and BWP5 completely overlap in the frequency domain.

[0131] In frequency hopping signal transmission, the number of frequency hops refers to the number of different frequencies involved in the frequency hopping. This is understandable. Figure 7a and Figure 7b The number of frequency hops, i.e., the number of frequencies at different positions involved in the frequency domain unit of each first signal, is merely an example. This application does not limit the number of frequency hops during frequency hopping transmission. In one example, the maximum number of frequency hops, i.e., the maximum number of hoppings, can be:

[0132]

[0133] Among them, BWP total BWP refers to the maximum bandwidth portion of a single channel coding (CC) function on a network device. UEThis refers to the portion of bandwidth that the terminal device can schedule. For example, the maximum BWP for a single NR CC is 100MHz, of which 20MHz is available for UE scheduling, so the maximum number of hoppings is 5.

[0134] In addition, the demodulation reference signal DMRS and the data signal can be found in the description of the above technical terms, and will not be repeated here.

[0135] S602, the terminal device acquires the channel frequency response (CFR) fluctuation value corresponding to the bandwidth portion (BWP) of each first signal, and the N CFR fluctuation values ​​are used to determine the channel measurement results.

[0136] For example, Figure 8 This is one of the flowchart examples of a channel measurement method provided in an embodiment of this application. For example... Figure 8 As shown, for each first signal, if the CFR fluctuation value corresponding to the BWP of the first signal is used to indicate the CFR change of each subcarrier in the BWP of the first signal, then the above... Figure 6 The N CFR fluctuation values ​​in the channel measurement method shown are used to determine the channel measurement results, and may specifically include:

[0137] S6021, The terminal device acquires the channel frequency response (CFR) of each subcarrier in the BWP of each of the N first signals.

[0138] For example, a terminal device can receive a first signal carried in each of N time-domain units sent by a network device, and measure each received first signal to obtain the channel frequency response (CFR) of each subcarrier in the BWP of that first signal. Assume the frequency domain transmission expression of the signal received by the terminal device is:

[0139] Y k =H k X k +n k .

[0140] Among them, Y k H represents the received signal of the k-th subcarrier. k X represents the channel frequency response of the k-th subcarrier. k n represents the transmitted signal of the k-th subcarrier. k This represents the noise of the k-th subcarrier. If there are multiple subcarriers within each BWP, then the CFR of each BWP includes the channel frequency response of each subcarrier within that BWP. For example, Figure 9 This is an example diagram showing the channel frequency response of each subcarrier within each BWP provided in the embodiments of this application. For example... Figure 9 As shown, the range of subcarriers within each of the different BWPs mentioned above can be represented as follows:

[0141] The range of subcarriers in BWP1 of the first signal #1:

[0142] The range of subcarriers within BWP2 of the first signal #2:

[0143] ...

[0144] The range of subcarriers in the BWPN of the first signal #N:

[0145] Here, Δf represents the frequency interval between adjacent subcarriers, also known as the subcarrier interval.

[0146] Based on this, the channel frequency response (CFR) of each subcarrier in the BWP of each of the N first signals can be represented by channel frequency response estimation:

[0147]

[0148] in, Y represents the channel frequency response estimate of the k-th subcarrier. k X represents the received signal of the k-th subcarrier. k This represents the transmitted signal of the k-th subcarrier, σ represents the noise variance / power, and n k This represents the noise of the k-th subcarrier.

[0149] Thus, through Figure 9 The curve shown is the signal frequency response curve, which illustrates the channel frequency response estimate for each subcarrier involved in the BWP where each of the first signals resides. The horizontal axis of the curve represents the frequency of the signal indicated by the channel frequency response estimate, and the vertical axis represents the amplitude response of the signal indicated by the channel frequency response estimate, thus visually demonstrating how the channel amplifies or attenuates the amplitude of signals at different frequencies. For example, the signal frequency response curve of an ideal channel is a horizontal straight line, indicating that the signal amplitude gain is the same at all frequencies. However, the specific signal frequency response curve will fluctuate; the signal amplitude may be attenuated at frequencies corresponding to some BWPs, while it may be amplified at frequencies corresponding to other BWPs. For example, Figure 9 In the above, the signal amplitude is stable and amplified at the frequency corresponding to BWP1 where the first signal #1 is located, while the signal amplitude is attenuated at the frequency corresponding to BWP2 where the first signal #2 is located.

[0150] Assuming it passes Figure 9 The curve shown Figure 7a or Figure 7b If the CFR of each subcarrier in the BWP of each first signal is given, then:

[0151] The channel frequency response of each subcarrier in BWP1 of the first signal #1 can be expressed as:

[0152] The channel frequency response of each subcarrier in BWP2 of the first signal #2 can be expressed as:

[0153] ...

[0154] The channel frequency response of each subcarrier in the BWPN of the first signal #N can be expressed as:

[0155] S6022, for each first signal, the terminal device determines the CFR fluctuation value corresponding to the BWP of the first signal based on the CFR of each subcarrier in the BWP of the first signal.

[0156] The CFR of each subcarrier in each BWP is as follows Figure 9 Taking the CFR of each subcarrier in the BWP of each first signal as an example, the terminal device can obtain the CFR fluctuation value of any one of the above N BWPs using the following formula:

[0157]

[0158] It is understandable that the first to the Nth BWP can specifically include Figure 9 The formulas used to indicate CFR and CFR fluctuation values ​​are BWP1 to BWPN. Furthermore, the formulas described above are merely examples. In specific applications, the terminal device can indicate the CFR of each subcarrier in the BWP and the corresponding CFR fluctuation value of the BWP in other ways, such as variance formulas, mean absolute deviation, etc. This application does not limit the indication method of CFR and CFR fluctuation values; it can be set according to application requirements.

[0159] S6023, the terminal device determines the CFR of each subcarrier in the first BWP and / or the index of the first BWP based on the comparison result of the CFR fluctuation value and the threshold value of each BWP in the N BWPs. The first BWP includes the BWPs whose comparison results satisfy the constraints among the N BWPs.

[0160] In one alternative implementation, the threshold value may include a first threshold value associated with data transmission and / or a second threshold value associated with sensing; correspondingly, the above constraints may include any one of the following:

[0161] The CFR volatility value corresponding to BWP is less than the first threshold value;

[0162] The CFR volatility value corresponding to BWP is greater than or equal to the first threshold value and less than or equal to the second threshold value;

[0163] The CFR volatility value corresponding to BWP is greater than the second threshold value.

[0164] The first threshold value associated with data transmission is used to distinguish whether CFR fluctuations apply to data transmission services or communication services, while the second threshold value associated with sensing is used to distinguish whether CFR fluctuations apply to sensing services. For example, the first threshold value, the second threshold value, and the specific constraints can be found in Table 1 below:

[0165] Table 1

[0166]

[0167] It is understood that the threshold values ​​and corresponding services shown in Table 1 above are only examples. This application does not restrict the specific values ​​of the threshold values ​​or the services to which the threshold values ​​and corresponding constraints apply. They can be set according to specific application situations.

[0168] In this embodiment, three comparison methods or constraints based on two threshold values ​​are used to determine channel measurement results applicable to communication services and / or sensing services, respectively. This ensures that, based on the channel measurement results, a channel with good communication performance, good sensing performance, or a balance between communication and sensing performance can be configured. It is understood that if the channel balances communication and sensing performance (i.e., using the threshold values ​​and constraints corresponding to Scheme 2 in Table 1), then the application scenario of this embodiment can include integrated communication and sensing.

[0169] S6024, the terminal device determines the channel measurement results based on the CFR of each subcarrier in the first BWP and / or the index of the first BWP.

[0170] Combining Table 1 above and Figure 9 As shown in the channel frequency response curve, for communication services, signal transmission on a flatter BWP (Bandwidth, Frequency, and Threshold) is better, as this avoids the signal falling into the fading region and thus improves communication performance. For sensing services, the essence of sensing is parameter estimation, estimating delay, and acquiring parameters such as Doppler. In this case, the larger the range of data frequency hopping, the better, for example, frequency hopping across the entire bandwidth of the channel. In simple terms, communication requires stable transmission on a flat BWP; sensing requires dynamic transmission traversing all BWPs. Therefore, channel measurement results can be used to indicate under what circumstances, which BWP(s) or BWP(s) should be selected for signal transmission to improve service performance. Specifically: the first BWP indicates one or more BWPs among the N BWPs whose comparison results satisfy the constraints, which can improve service performance when used for signal transmission.

[0171] Based on this, the above-mentioned S6024 may specifically include: the terminal device using the CFR of each subcarrier in the first BWP as the channel measurement result; or, the terminal device using the index of the first BWP as the channel measurement result; or, the terminal device using both the CFR of each subcarrier in the first BWP and the index of the first BWP as the channel measurement result.

[0172] This application does not limit the specific implementation of S6024. Any information that can be used to indicate the first BWP can be used as the channel measurement result. The specific implementation can be set according to the application requirements.

[0173] In one alternative example, the first BWP can be used to indicate the BWP among the N BWPs whose comparison results do not meet the constraints. That is, the first BWP is one or more of the aforementioned N BWPs that cannot improve service performance when used for signal transmission. In this case, the terminal device or network device can select a BWP different from the first BWP to transmit the signal in order to improve service performance; that is, it can select a BWP different from the BWP indicated by the channel measurement results to transmit the signal.

[0174] In this embodiment, the CFR fluctuation value corresponding to the BWP can indicate the CFR changes of each subcarrier in the BWP. These changes reflect the channel conditions of the BWP, and different channel conditions can be distinguished by threshold values. Based on this, the CFR of each subcarrier in the first BWP and / or the index of the first BWP, determined by the terminal device according to the comparison results of each CFR fluctuation value and the threshold value, can indicate different channel conditions and thus can be used to determine channel measurement results.

[0175] In one alternative implementation, the union of the N BWPs in the frequency domain includes the entire bandwidth of the channel.

[0176] The union of N BWPs in the frequency domain is used to indicate the portion of these BWPs in the frequency domain excluding the overlapping portion, i.e., the above. Figure 1a The equivalent bandwidth has already been described in the examples. See also... Figure 7a If only BWP2 and BWP3 overlap among the N BWPs, then the union of the N BWPs in the frequency domain includes the bandwidths corresponding to the frequency domain units numbered 70 to 89, and the bandwidths corresponding to the frequency domain units numbered 75 to 77, where BWP2 and BWP3 overlap, are not included repeatedly.

[0177] In this embodiment, the base station can perform frequency hopping transmission of the first signal across the full bandwidth, i.e., the entire bandwidth of the channel, thereby further widening the bandwidth limit (BWP). By utilizing the channel frequency response of more BWPs, more comprehensive and accurate channel measurement results can be obtained. Thus, these channel measurement results can be used to optimize sensing performance.

[0178] Furthermore, when the first signal includes DMRS, there is no need to know the channel information in advance, and the signal can be transmitted directly by frequency hopping. In low-order modulation transmission where the network device has no channel information available, that is, in a modulation scenario where the number of bits carried by the signal is small, the transmitted data is less affected by the channel. In this case, even if the network device does not know the channel information in advance and directly transmits the data signal by frequency hopping, the data transmission performance, i.e., the communication performance, can still be guaranteed.

[0179] In an alternative implementation, see also Figure 8 After determining the channel measurement results, the channel measurement method provided in this application embodiment may further include:

[0180] S603, the terminal device reports the channel measurement results to the network device.

[0181] For example, a terminal device can report the CFRs of each subcarrier within a first BWP and / or the index of the first BWP to the network device. When the terminal device reports the CFRs of each subcarrier within the first BWP to the network device, the network device can determine the index of the first BWP corresponding to the CFR of each subcarrier within the first BWP, thereby configuring the first BWP for the terminal device to improve service performance. The network device can record the CFRs of each subcarrier within the first BWP for reuse in other communication services, such as QCL, thereby further improving the performance of the communication system.

[0182] In this embodiment of the application, the terminal device reports channel measurement results to the network device, so that the network device can configure a channel that is beneficial to improving service performance for the terminal device based on the received channel measurement results.

[0183] In an optional implementation, before reporting the channel measurement results, the above communication method may further include:

[0184] The channel measurement results are compressed.

[0185] In one optional implementation, the terminal device reports channel measurement results, which may specifically include:

[0186] The terminal device compresses the channel measurement results, and this compression is used to reduce the amount of redundant data in the channel measurement results.

[0187] The terminal device reports the compressed channel measurement results.

[0188] In practical applications, the channel frequency response in channel measurement results usually has a large amount of data, such as 1000 values ​​or 120 coefficients, which would be very costly to upload directly. In fact, the channel measurement results contain a lot of redundant information (e.g., values ​​close to 0), while in the time domain there are only a few (e.g., 3-5) effective coefficients (e.g., non-zero values). Therefore, the terminal device can compress the channel measurement results in the time domain.

[0189] For example, the terminal device compresses the channel measurement results using a compression matrix B, for instance, by compressing the CFR (such as H) of each subcarrier in the first BWP. k The compression is performed to obtain the compressed channel measurement results, for example, the compressed coefficient A. n :

[0190] A n =BH k ;

[0191] The compression matrix may include, for example, a DFT basis, a Chirp basis, a DPSS basis, and / or a Cos basis. Specifically:

[0192] DFT basis: The basis functions of the Discrete Fourier Transform (DFT) are a set of complex exponential sequences. Basis functions are the fundamental set of functions used in mathematics and engineering to represent other functions or signals.

[0193] Chirp basis: A set of functions typically obtained by scaling, shifting, or performing other operations on a chirp signal, including time and frequency transformations. A chirp signal is a signal whose frequency varies over time.

[0194] DPSS basis: basis functions for Discrete Prolate Spheroidal Sequences, a set of discrete sequences that have good band-limited properties within a finite interval.

[0195] Cos basis: usually refers to a set of basis functions built on the basis of cosine functions, consisting of a series of cosine functions of different frequencies.

[0196] It is understood that the above compression matrix is ​​only an example. The embodiments of this application do not limit the compression method of the channel measurement results or the compression matrix used, and can be set according to application requirements.

[0197] In this embodiment, the terminal device compresses the channel measurement results. This compression reduces the amount of redundant data in the channel measurement results, thereby avoiding resource occupation by redundant data and improving system performance. For example, storing compressed data avoids occupying storage resources. Furthermore, the terminal device compresses the channel measurement results before reporting them. This compression reduces the amount of redundant data in the channel measurement results, thereby avoiding the occupation of transmission resources by redundant data, improving reporting efficiency and the processing efficiency of network devices on the channel measurement results, and further improving the performance of the communication system.

[0198] In an optional implementation, the channel measurement method provided in this application embodiment may further include a terminal device targeting each of N first signals:

[0199] Based on the first signal, the first characteristic content of the BWP of the first signal is obtained, and the first characteristic content of the BWP of the first signal is used to indicate the content other than CFR in QCL-Type A of the BWP.

[0200] Based on the CFR of each subcarrier in the BWP of the first signal and the first characteristic content of the BWP, determine the QCL-Type A of the BWP of the first signal;

[0201] According to the QCL-Type A of the BWP of the first signal, the quasi-co-located reference signal associated with the first signal shares the QCL characteristics of the BWP of the first signal, and the quasi-co-located reference signal associated with the first signal has a QCL relationship with the first signal.

[0202] For example, the terminal device can perform the above-described process of obtaining the first characteristic content of the BWP of the first signal based on the first signal when receiving a first signal carried by one or more (two or more) time domain units out of N time domain units. That is, this embodiment can be performed as described above. Figure 6 The implementation may be performed before or after S602 in the embodiment, or simultaneously with S602.

[0203] For example, under the frequency hopping transmission mechanism, the first signal can be used to obtain more channel and transmission information. Thus, the first characteristic content of any BWP among the N BWPs can include: the transmission quality of that BWP obtained through the block error ratio (BLER), the latency of the sensing target obtained through the distance between the terminal device and the sensing target, and the Doppler effect of the sensing target obtained through the velocity of the sensing target (such as Doppler shift and Doppler spread). The block error ratio is a key indicator used in the field of communications to measure the reliability of data transmission, indicating the proportion of erroneous data blocks in the received data. The specific methods for obtaining the first characteristic content of the BWP can be found in relevant existing technologies and will not be elaborated here.

[0204] In another example, when the terminal device uploads the CFR of each subcarrier in each BWP to the network device, the network device can perform the relevant steps based on the shared QCL characteristics of the CFR of each subcarrier in each BWP in this embodiment. This is applicable to scenarios where the terminal device has limited computing power or high performance requirements, and facilitates the expansion of the application scenarios of the channel measurement method provided in this application embodiment.

[0205] In this embodiment, the terminal device can obtain the characteristic content (excluding CFR) of QCL-Type A corresponding to each first signal by measuring each first signal transmitted by the network device via frequency hopping. This first characteristic content, in turn, allows the terminal device to determine the QCL-Type A corresponding to each first signal based on the CFR and the first characteristic content. Therefore, for each first signal, QCL characteristics can be shared with reference signals that have a QCL relationship with it, based on the QCL-Type A corresponding to that first signal. This reduces the cost of obtaining QCL characteristics for different reference signals and simplifies spatial multiplexing of different ports on the antenna, thereby improving the performance of the communication system. It is understood that the first characteristic content corresponding to any first signal is the first characteristic content of the BWP of that first signal, the CFR corresponding to any first signal is the CFR of each subcarrier in the BWP of that first signal, and the QCL-Type A corresponding to any first signal is the QCL-Type A of the BWP of that first signal.

[0206] In one alternative implementation, the quasi-co-location reference signal includes a tracking reference signal TRS and / or a channel state information reference signal CSI-RS;

[0207] Accordingly, based on the QCL-Type A of the BWP, the quasi-co-address reference signal associated with each of the first signals shares the QCL characteristics of the BWP, which may specifically include:

[0208] Provide the QCL-Type A corresponding to the first signal to the TRS associated with the first signal, provide the QCL-Type A corresponding to the first signal to the CSI-RS associated with the first signal, and / or receive the frequency offset information in the Type B characteristic QCL-Type B of the QCL provided by the TRS associated with the first signal.

[0209] In practical applications, for each first signal, the terminal device can upload the QCL-Type A corresponding to the first signal to the network device. The network device then multiplexes the QCL-Type A for the TRS associated with the first signal, multiplexes the QCL-Type A for the CSI-RS associated with the first signal, and / or, the network device multiplexes the frequency offset information in QCL-Type B for the first signal. Accordingly, the terminal device can receive the frequency offset information in QCL-Type B, which is provided to the network device by the TRS associated with the first signal.

[0210] For example, Figure 10 This is an example diagram illustrating QCL relationships and QCL feature sharing provided in embodiments of this application. For example... Figure 10 As shown, by applying the channel measurement method provided in this application embodiment, spatial multiplexing of different ports on the antenna can include processing steps 1 to 3. Processing step 1 can include the network device performing time-frequency domain synchronization of different ports on the antenna via a synchronization signal (SSB) during initial UE access. Processing step 2 can include the network device obtaining QCL-TypeD via a beam-managed channel state information reference signal (CSI-RS BM) and multiplexing it to the channel state information reference signal for 3I measurement (CSI-RS for 3I measurement), the physical downlink shared channel (PDSCH), or the physical downlink control channel (PDCCH); the network device obtaining QCL-TypeB via a tracking reference signal (TRS) and multiplexing it to the CSI-RS for 3I measurement; and the network device obtaining QCL-TypeC via the CSI-RS for 3I measurement and multiplexing it to the first signal. Processing step 3 can include the network device obtaining QCL-TypeA via the first signal and multiplexing it to the TRS, and multiplexing QCL-TypeB obtained via the TRS to the first signal.

[0211] In this embodiment of the application, the quasi-co-located reference signal associated with the first signal includes a tracking reference signal TRS and / or a channel state information reference signal CSI-RS, thereby multiplexing the QCL characteristics among multiple reference signals, further simplifying the spatial multiplexing of different ports on the antenna, and improving the performance of the communication system.

[0212] For ease of understanding, the following examples illustrate the communication performance improvement effect of the channel measurement method provided in the embodiments of this application.

[0213] For example, Figure 11 This is an example diagram illustrating the sensing performance of a sensing service based on a channel measurement method provided in an embodiment of this application. For example... Figure 11 As shown, after obtaining the channel measurement result through the channel measurement method provided in this application embodiment, distance is sensed based on the channel measurement result. At this time, assuming two targets are sensed, power = [0 0] dB, and no speed difference, the performance of distance sensing is as follows: the frequency hopping scheme can obtain a lower distance estimation error, such as the root mean square error (RMSE), that is, better sensing performance. For example, Figure 11 The RMSE of the existing solution baseline is higher than that of the solution based on different frequency hopping schemes. In other words, in the channel measurement method provided in this application embodiment, the first signal is transmitted with different frequency hopping schemes to obtain channel measurement results, and the distance is sensed based on the channel measurement results, thus improving the sensing performance compared with the existing solution.

[0214] For example, Figure 12 This is an example diagram illustrating the communication performance of a communication service based on a channel measurement method provided in an embodiment of this application. For example... Figure 12 As shown, taking communication performance including BLER as an example, after obtaining the channel measurement result through the channel measurement method provided in this application embodiment, data transmission based on the channel measurement result can achieve better communication performance. For example, Figure 12 The communication BLER performance of channels based on different frequency hopping schemes is improved compared to the baseline of existing schemes. In other words, in the channel measurement method provided in this application embodiment, the first signal is sent with different frequency hopping schemes to obtain the channel measurement result, and data is transmitted based on the channel measurement result, thus improving the communication performance compared to existing schemes.

[0215] This application also provides a communication apparatus for implementing the above-described channel measurement method.

[0216] For example, Figure 13 This is one of the example diagrams showing the frame structure of the communication device provided in the embodiments of this application. For example... Figure 13 As shown, the communication device 1300 may include:

[0217] The channel measurement unit 1301 is used to acquire the channel frequency response (CFR) fluctuation value corresponding to the bandwidth portion (BWP) of each of the N first signals, where N is an integer greater than 1, the N first signals are respectively carried in N time domain units, and the BWP of the first signals carried by any two closest time domain units partially overlap or do not overlap in the frequency domain. The N CFR fluctuation values ​​are used to determine the channel measurement result, and the first signals include demodulation reference signal DMRS and / or data signals.

[0218] It is understandable that the above Figure 13 The communication device shown is an example. In specific applications, the device can be a terminal device, or a device, module, circuit, or chip configured in a terminal device, or a device that can be used in conjunction with a terminal device. In one design, the module in the communication device can be a hardware circuit, software, or a combination of hardware circuitry and software implementation.

[0219] For example, Figure 14 This is one of the example diagrams showing the frame structure of the communication device provided in the embodiments of this application. For example... Figure 14 As shown, the communication device 1400 may include:

[0220] The signal transmitting unit 1401 is used to transmit each of N first signals via frequency hopping, where N is an integer greater than 1. The N first signals are respectively carried in N time domain units. The bandwidth portions (BWP) of the first signals carried in the two closest time domain units partially overlap or do not overlap in the frequency domain. The channel frequency response (CFR) fluctuation values ​​corresponding to the BWP of the N first signals are used by the terminal equipment to obtain channel measurement results. The first signals include demodulation reference signal (DMRS) and / or data signals.

[0221] It is understandable that the above Figure 14 The communication device shown is an example. In specific applications, the device can be a network device, or a device, module, circuit, or chip configured within a network device, or a device compatible with a network device. In one design, the module in the device can be a hardware circuit, software, or a combination of hardware circuitry and software implementation.

[0222] For example, Figure 15 This is one of the example diagrams showing the frame structure of the communication device provided in the embodiments of this application. For example... Figure 15 As shown, the communication device 1500 includes a processing unit 1510 and a transceiver unit 1520. The communication device 1500 is used to implement the functions of the terminal device or network device in the above method embodiments.

[0223] When the communication device 1500 is used to implement the functions of the terminal device in the method embodiment: the transceiver unit 1520 is used to perform the above... Figure 13 The channel measurement unit 1301 contains functions related to signal transmission and reception. When the communication device 1500 is used to implement the functions of the network device in the method embodiment: the transceiver unit 1520 is used to perform the above-mentioned functions. Figure 14 The signal transmission unit 1401 contains functions related to signal transmission.

[0224] For example, Figure 16 This is one of the example diagrams showing the frame structure of the communication device provided in the embodiments of this application. For example... Figure 16 As shown, the communication device 1600 includes a processor 1610 and an interface circuit 1620. The processor 1610 and the interface circuit 1620 are coupled to each other. It is understood that the interface circuit 1620 can be a transceiver or an input / output interface. Optionally, the communication device 1600 may also include a memory 1630 for storing instructions executed by the processor 1610, or storing input data required by the processor 1610 to execute instructions, or storing data generated after the processor 1610 executes instructions.

[0225] When the communication device 1600 is used to implement the functions of the terminal device or network device in the above method embodiments, the processor 1610 is used to implement the above... Figure 15 The interface circuit 1620 is used to implement the functions of the processing unit 1510. Figure 15 Functions of the transceiver unit 1520.

[0226] Understandable, Figure 15 and Figure 16 The diagram illustrates the possible structures of communication devices provided in embodiments of this application. These communication devices can be used to implement the functions of terminals or base stations in the above method embodiments, and thus can also achieve the beneficial effects of the above method embodiments.

[0227] In addition, this application Figures 2 to 5 and Figures 13 to 16 The frameworks shown, in order to implement the functions of the channel measurement methods in the embodiments of this application described above, include hardware and / or software modules corresponding to the execution of each function. Based on the algorithm steps of the examples described in conjunction with the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by 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 in conjunction with the embodiments, but such implementation should not be considered beyond the scope of this application.

[0228] This embodiment also provides a computer storage medium storing computer instructions. When the computer instructions are executed on an electronic device, the electronic device performs the aforementioned method steps to implement the channel measurement method in the above embodiment.

[0229] This embodiment also provides a computer program product that, when run on a computer, causes the computer to perform the aforementioned related steps to implement the channel measurement method in the above embodiment.

[0230] In this embodiment, the electronic device, computer storage medium, computer program product or chip are all used to execute the corresponding method provided above. Therefore, the beneficial effects that can be achieved can be referred to the beneficial effects of the corresponding method provided above, and will not be repeated here.

[0231] Any content in the various embodiments of this application, as well as any content in the same embodiment, can be freely combined. Any combination of the above content is within the scope of this application.

[0232] Those skilled in the art will recognize that the functions described in the embodiments of this application in one or more of the above examples can be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or code on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any medium that facilitates the transfer of a computer program from one place to another. Storage media can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0233] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A channel measurement method, characterized in that, The method includes: Obtain the channel frequency response (CFR) fluctuation value corresponding to the bandwidth portion (BWP) of each of the N first signals; Wherein, N is an integer greater than 1, the N first signals are respectively carried in N time domain units, the BWP of the first signals carried by any two closest time domain units partially overlap or do not overlap in the frequency domain, the N CFR fluctuation values ​​are used to determine the channel measurement results, and the first signals include demodulation reference signal DMRS and / or data signals.

2. The method according to claim 1, characterized in that, The CFR fluctuation value is used to indicate the CFR change of each subcarrier in the BWP corresponding to the CFR fluctuation value; The N CFR fluctuation values ​​are used to determine the channel measurement results, including: Based on the comparison results of the CFR fluctuation value and the threshold value corresponding to each BWP in the N BWPs, the CFR of each subcarrier in the first BWP and / or the index of the first BWP are determined. The first BWP includes the BWPs whose comparison results satisfy the constraints among the N BWPs. The channel measurement results are determined based on the CFR of each subcarrier in the first BWP and / or the index of the first BWP.

3. The method according to claim 2, characterized in that, The threshold values ​​include a first threshold value associated with data transmission and / or a second threshold value associated with sensing; The constraint includes any one of the following: The CFR volatility value corresponding to BWP is less than the first threshold value; The CFR fluctuation value corresponding to BWP is greater than or equal to the first threshold value and less than or equal to the second threshold value; The CFR volatility value corresponding to BWP is greater than the second threshold value.

4. The method according to any one of claims 1 to 3, characterized in that, The union of the N BWPs in the frequency domain includes the entire bandwidth of the channel.

5. The method according to any one of claims 1 to 4, characterized in that, The method further includes: Based on each first signal, the first characteristic content of the BWP of each first signal is obtained, and the first characteristic content of the BWP of each first signal is used to indicate the content other than CFR in the Type A characteristic QCL-Type A of the quasi-co-address QCL of each first signal. Based on the CFR of each subcarrier in the BWP of each first signal and the first characteristic content of the BWP of each first signal, determine the QCL-Type A of the BWP of each first signal; Based on the QCL-Type A of the BWP of each first signal, the QCL characteristics of the BWP of each first signal are shared with the quasi-co-address reference signal associated with each first signal, and the quasi-co-address reference signal associated with each first signal has a QCL relationship with each first signal.

6. The method according to claim 5, characterized in that, The quasi-co-location reference signal includes a tracking reference signal TRS and / or a channel state information reference signal CSI-RS; The step of sharing the QCL characteristics of the BWP of each first signal with the quasi-co-address reference signal associated with the first signal according to the QCL-Type A of the BWP of each first signal includes: Provide the QCL-Type A corresponding to each first signal to the TRS associated with each first signal, provide the QCL-Type A corresponding to each first signal to the CSI-RS associated with each first signal, and / or receive the frequency offset information in the Type B characteristic QCL-Type of the QCL provided by the TRS associated with each first signal.

7. The method according to any one of claims 1 to 6, characterized in that, After obtaining the channel frequency response (CFR) fluctuation value corresponding to the bandwidth portion (BWP) of each of the N first signals, the method further includes: Report the channel measurement results.

8. The method according to claim 7, characterized in that, Before reporting the channel measurement results, the method further includes: The channel measurement results are compressed.

9. A channel measurement method, characterized in that, The method includes: Each of the N first signals is transmitted via frequency hopping; Wherein, N is an integer greater than 1, the N first signals are respectively carried in N time domain units, the bandwidth portions (BWP) of the first signals carried in the two closest time domain units partially overlap or do not overlap in the frequency domain, the channel frequency response (CFR) fluctuation values ​​corresponding to the BWP of the N first signals are used by the terminal device to obtain channel measurement results, and the first signals include demodulation reference signal (DMRS) and / or data signals.

10. The method according to claim 9, characterized in that, The CFR fluctuation value is used to indicate the CFR change of each subcarrier in the BWP corresponding to the CFR fluctuation value; The channel measurement result is determined based on the CFR of each subcarrier in the first BWP and / or the index of the first BWP; wherein, the first BWP includes BWPs among N BWPs, and the comparison result of the CFR fluctuation value and the threshold value of the corresponding BWP satisfies the constraint.

11. The method according to claim 10, characterized in that, The threshold values ​​include a first threshold value associated with data transmission and / or a second threshold value associated with sensing; The constraint includes any one of the following: The CFR volatility value corresponding to BWP is less than the first threshold value; The CFR fluctuation value corresponding to BWP is greater than or equal to the first threshold value and less than or equal to the second threshold value; The CFR volatility value corresponding to BWP is greater than the second threshold value.

12. The method according to any one of claims 9 to 11, characterized in that, The union of the BWPs of the N first signals in the frequency domain includes the entire bandwidth of the channel.

13. The method according to any one of claims 9 to 12, characterized in that, After transmitting each of the N first signals via frequency hopping, the method further includes: The quasi-co-address QCL of the BWP receiving each first signal has a Type A characteristic QCL-Type A, wherein the QCL-Type A of the BWP receiving each first signal is determined by the terminal device based on the first signal; Based on the QCL-Type A of the BWP of each first signal, the QCL characteristics of the BWP of each first signal are multiplexed for the quasi-co-address reference signal associated with each first signal, and the quasi-co-address reference signal associated with each first signal has a QCL relationship with each first signal.

14. The method according to claim 13, characterized in that, The quasi-co-location reference signal includes a tracking reference signal TRS and / or a channel state information reference signal CSI-RS; The step of multiplexing the QCL characteristics of the BWP of each first signal to the quasi-co-address reference signal associated with each first signal according to the QCL-Type A of the BWP of each first signal includes: For each first signal, the TRS associated with it reuses the QCL-Type A corresponding to each first signal; for each first signal, the CSI-RS associated with it reuses the QCL-Type A; and / or, for each first signal, the frequency offset information in the Type B characteristic QCL-Type of the QCL provided by the TRS associated with it reuses the frequency offset information.

15. The method according to any one of claims 9 to 14, characterized in that, After transmitting each of the N first signals via frequency hopping, the method further includes: Receive the channel measurement results.

16. A communication system, characterized in that, The system includes terminal equipment and network equipment; The network device is configured to transmit each of N first signals via frequency hopping, where N is an integer greater than 1. The N first signals are respectively carried in N time-domain units, and the bandwidth portions (BWP) of the first signals carried by any two closest time-domain units do not completely overlap or do not overlap in the frequency domain. The first signals include a demodulation reference signal (DMRS) and / or a data signal. The terminal device is used to acquire the channel frequency response (CFR) fluctuation value in the BWP of each first signal, and the N CFR fluctuation values ​​are used to determine the channel measurement result.

17. A communication device, characterized in that, Includes units or modules for performing the method as described in any one of claims 1-8 or 9-15.

18. A communication device, characterized in that, include: Processor and storage media; The processor is connected to the storage medium; The storage medium is used to store one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the method as claimed in any one of claims 1 to 8, or claims 9 to 15.

19. A communication device comprising a processor for processing data and / or information such that the method of any one of claims 1 to 8, or claims 9 to 15, is implemented.

20. A computer-readable storage medium, characterized in that, The method includes instructions, characterized in that, when the instructions are executed by a processor, the method described in claims 1 to 8, or any one of claims 9 to 15, is implemented.

21. A chip, characterized in that, It includes one or more processors; when said processors execute programs or instructions, the method described in claims 1 to 8, or any one of claims 9 to 15, is implemented.

22. A computer program product, characterized in that, Includes computer program code or instructions that, when executed, cause the method described in claims 1 to 8, or any one of claims 9 to 15, to be implemented.

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