Communication method and apparatus

Abstract

Provided in the present application are a communication method and apparatus. The method comprises: determining a sounding reference signal (SRS) sequence, wherein the SRS sequence comprises a plurality of mutually independent SRS subsequences, the plurality of SRS subsequences correspond to a plurality of frequency bands on a one-to-one basis, any one of the plurality of SRS subsequences may be referred to as a first SRS subsequence, then, for the first SRS subsequence, the first SRS subsequence may be mapped to a frequency band corresponding to the first SRS subsequence, and an SRS may be obtained after resource mapping of each SRS subsequence; and transmitting the SRS. In the present application, a terminal can determine mutually independent SRS subsequences for different frequency bands, and the terminal can perform resource mapping and transmission for SRS subsequences independent of each other, such that a network device can perform channel estimation more accurately in the case of SRS frequency hopping transmission.

Description

Communication methods and devices

[0001] This application claims priority to Chinese Patent Application No. 202411014358.X, filed on July 25, 2024, entitled "Communication Method and Apparatus", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of wireless communication, and more particularly to communication methods and apparatus. Background Technology

[0003] In Long Term Evolution (LTE) and New Radio Access (NR) technologies, terminals send sounding reference signals (SRS) to network devices. This allows network devices to obtain uplink channel state information by measuring the SRS. For Time Division Duplex (TDD) systems, network devices can utilize the reciprocity between uplink and downlink channels to determine the downlink channel state information based on the uplink channel state information. Furthermore, based on this downlink channel state information, they can perform resource scheduling for data transmission and data precoding.

[0004] During SRS measurement, one approach involves the terminal transmitting SRS over a portion of the measurement bandwidth; this method is called SRS frequency hopping transmission. Network devices can obtain channel state information based on channel estimation across the entire SRS measurement bandwidth through multiple SRS transmissions.

[0005] However, network devices can divide a bandwidth into multiple frequency bands using different methods. Different frequency bands may use different precoding weights, and consequently, the corresponding beams may differ. During SRS frequency hopping transmission, misalignment may occur between the frequency band division method corresponding to SRS frequency hopping and the frequency division method of the network device. This will prevent the network device from accurately estimating the channel. Summary of the Invention

[0006] This application provides a communication method and apparatus. A terminal can determine independent SRS sub-sequences for different frequency bands, and after resource mapping of multiple independent SRS sub-sequences, transmit the complete SRS sequence. This ensures improved accuracy of channel estimation by network devices in the case of SRS frequency hopping transmission.

[0007] To achieve the above objectives, this application adopts the following technical solution:

[0008] Firstly, a communication method is provided, which is applied to a terminal. The terminal can be a component of the terminal (e.g., a processor, circuit, chip, or chip system), or a logic module or software capable of implementing all or part of the terminal's functions. For ease of description, the following explanation uses the terminal as an example. The method may include: determining a sounding reference signal (SRS) sequence. This SRS sequence includes multiple independent SRS sub-sequences, each corresponding to a specific frequency band. Any one of the multiple SRS sub-sequences can be called the first SRS sub-sequence. Then, for the first SRS sub-sequence, it can be mapped to the corresponding frequency band. The SRS is obtained after mapping the resources of each SRS sub-sequence. The SRS is then transmitted.

[0009] In this application, the terminal can determine independent SRS sub-sequences for different frequency bands. Furthermore, the terminal can perform resource mapping and transmission for each independent SRS sub-sequence. This enables network devices to perform more accurate channel estimation in the case of SRS frequency hopping transmission.

[0010] In one possible design, the first SRS subsequence corresponds to the first frequency band. The first SRS subsequence can be determined based on the cyclic shift parameters and the SRS base sequence corresponding to the first frequency band.

[0011] This application generates SRS sub-sequences corresponding to each frequency band. In the case of SRS frequency hopping transmission, the terminal can perform resource mapping and transmission for each SRS sub-sequence, thereby improving the accuracy of channel estimation by network devices.

[0012] In one possible design, the first SRS subsequence is determined based on the cyclic shift parameters and SRS base sequence corresponding to the first frequency band, and may include: the first SRS subsequence is determined based on one or more of the cyclic shift parameters, SRS base sequence, and parameters for adjusting the phase corresponding to the first frequency band.

[0013] This application embodiment introduces parameters for adjusting the phase corresponding to the frequency band to reduce the PAPR of the SRS sequence, thereby avoiding power back-off.

[0014] In one possible design, at least two frequency bands have different analog weights. Alternatively, all frequency bands have the same analog weights.

[0015] This application provides a variety of methods for determining the generation of SRS sub-sequences for different frequency bands, so as to adopt the appropriate method for generating SRS sub-sequences in different scenarios.

[0016] In one possible design scheme, the beams corresponding to each frequency band in multiple frequency bands are the same, and there is a frequency domain spacing between two adjacent frequency bands. The method may further include: determining a second parameter. This second parameter can be used to represent the time-frequency resource location spacing between two adjacent SRS subsequences. For example, the time-frequency resource location spacing includes the frequency domain spacing. For resource mapping of the corresponding SRS subsequences in each frequency band, it may include: for a first SRS subsequence, determining the time-frequency resource location corresponding to the first SRS subsequence based on one or more of the second parameter, the number of SRS ports, and the SRS power factor; and performing resource mapping on the first SRS subsequence according to the time-frequency resource location corresponding to the first SRS subsequence.

[0017] This application can determine the SRS sub-sequence of each frequency band when there is a frequency domain gap between adjacent frequency bands. This enables network devices to perform joint channel estimation based on the SRS signals corresponding to non-adjacent frequency bands, thereby improving the accuracy of channel estimation.

[0018] In one possible design, the second parameter may include a frequency domain interval and / or a time domain interval. The frequency domain interval may be determined based on one or more of the following: comb tooth degree associated with the frequency domain, the starting frequency domain position, and the mapping bias of the first SRS subsequence. The time domain interval may be determined based on the starting time domain position and / or the time domain bias.

[0019] This application provides a method for determining frequency domain spacing and time domain spacing, so that the terminal can accurately determine the SRS subsequence corresponding to each frequency band with frequency domain spacing.

[0020] In one possible design, the mapping bias of the first SRS subsequence can be determined based on one or more of the following: frequency division granularity, number of subcarriers in a resource block, frequency division multibeam scheduling factor, and length of the first SRS subsequence.

[0021] This application provides a method for determining the mapping bias of the first SRS subsequence to ensure that the terminal can accurately determine the SRS subsequence corresponding to each frequency band with frequency domain spacing.

[0022] In one possible design, the length of the first SRS subsequence can be determined based on one or more of the frequency-domain-related comb tooth degree, frequency division multi-beam scheduling factor, and frequency domain scaling factor.

[0023] This application provides a method for determining the length of the first SRS subsequence, so that each SRS subsequence can be determined more accurately in scenarios where there is a frequency domain interval between adjacent frequency bands.

[0024] Secondly, a communication method is provided, which is applied to a network device. This network device can be a component of the network device (e.g., a processor, circuit, chip, or chip system), or a logic module or software capable of implementing all or part of the network device's functions. For ease of description, the following explanation uses an example executed by a network device. The method may include: receiving a Signal-Responding System (SRS). The SRS is obtained through SRS sequence mapping. The SRS sequence may include multiple independent SRS sub-sequences. These multiple SRS sub-sequences correspond one-to-one with multiple frequency bands. Channel estimation is performed based on the SRS.

[0025] In one possible design, the first SRS subsequence corresponds to the first frequency band, and the first SRS subsequence can be determined based on the cyclic shift parameter and the SRS base sequence corresponding to the first frequency band. The first SRS subsequence can be any one of multiple SRS subsequences.

[0026] In one possible design, the first SRS subsequence is determined based on the cyclic shift parameters and SRS base sequence corresponding to the first frequency band, and may include: the first SRS subsequence is determined based on one or more of the cyclic shift parameters, SRS base sequence, and parameters for adjusting the phase corresponding to the first frequency band.

[0027] In one possible design, at least two frequency bands have different analog weights. Alternatively, all frequency bands have the same analog weights.

[0028] In one possible design, the beams corresponding to each frequency band in multiple frequency bands are identical, and there is a frequency domain spacing between two adjacent frequency bands. The time-frequency resource location corresponding to the first SRS subsequence can be determined based on one or more of the second parameter, the number of SRS ports, and the SRS power factor. The second parameter represents the time-frequency resource location spacing between two adjacent SRS subsequences. The time-frequency resource location spacing may include the frequency domain spacing.

[0029] In one possible design, the second parameter may include a frequency domain interval and / or a time domain interval. The frequency domain interval may be determined based on one or more of the following: comb tooth degree associated with the frequency domain, the starting frequency domain position, and the mapping bias of the first SRS subsequence. The time domain interval may be determined based on the starting time domain position and / or the time domain bias.

[0030] In one possible design, the mapping bias of the first SRS subsequence can be determined based on one or more of the following: frequency division granularity, number of subcarriers in a resource block, frequency division multibeam scheduling factor, and length of the first SRS subsequence.

[0031] In one possible design, the length of the first SRS subsequence can be determined based on one or more of the frequency-domain-related comb tooth degree, frequency division multi-beam scheduling factor, and frequency domain scaling factor.

[0032] Thirdly, a communication device is provided, which may be equipped with a terminal, or a communication module within the terminal, or a chip within the terminal responsible for communication functions, such as a modem chip (also known as a baseband chip), or a system-on-chip (SoC) or system-in-package (SIP) chip containing a modem module. It may also be a logic module or software capable of implementing all or part of the terminal's functions. For ease of description, the following explanation uses execution by the terminal as an example. It includes: a processing unit for determining an SRS sequence. The SRS sequence includes multiple independent SRS sub-sequences, each corresponding to a specific frequency band. Any one of the multiple SRS sub-sequences can be called the first SRS sub-sequence. The processing unit is further configured to map the first SRS sub-sequence to the corresponding frequency band. The SRS can be obtained after mapping the resources of each SRS sub-sequence. A transceiver unit is used to transmit the SRS.

[0033] In one possible design, the first SRS subsequence corresponds to the first frequency band. The first SRS subsequence can be determined based on the cyclic shift parameters and the SRS base sequence corresponding to the first frequency band.

[0034] In one possible design, the first SRS subsequence is determined based on the cyclic shift parameters and SRS base sequence corresponding to the first frequency band, and may include: the first SRS subsequence is determined based on one or more of the cyclic shift parameters, SRS base sequence, and parameters for adjusting the phase corresponding to the first frequency band.

[0035] In one possible design, at least two frequency bands have different analog weights. Alternatively, all frequency bands have the same analog weights.

[0036] In one possible design, the beams corresponding to each frequency band in multiple frequency bands are the same, and there is a frequency domain spacing between two adjacent frequency bands. The processing unit is further configured to: determine a second parameter. This second parameter can represent the time-frequency resource location spacing between two adjacent SRS subsequences. For example, the time-frequency resource location spacing includes the frequency domain spacing. For a first SRS subsequence, the time-frequency resource location corresponding to the first SRS subsequence is determined based on one or more of the second parameter, the number of SRS ports, and the SRS power factor. The first SRS subsequence is then resource-mapped according to its corresponding time-frequency resource location.

[0037] In one possible design, the second parameter may include a frequency domain interval and / or a time domain interval. The frequency domain interval may be determined based on one or more of the following: comb tooth degree associated with the frequency domain, the starting frequency domain position, and the mapping bias of the first SRS subsequence. The time domain interval may be determined based on the starting time domain position and / or the time domain bias.

[0038] In one possible design, the mapping bias of the first SRS subsequence can be determined based on one or more of the following: frequency division granularity, number of subcarriers in a resource block, frequency division multibeam scheduling factor, and length of the first SRS subsequence.

[0039] In one possible design, the length of the first SRS subsequence can be determined based on one or more of the frequency-domain-related comb tooth degree, frequency division multi-beam scheduling factor, and frequency domain scaling factor.

[0040] Fourthly, a communication device is provided, which may be equipped with network equipment, or a communication module within a network device, or a chip within a network device responsible for communication functions, such as a modem chip (also known as a baseband chip), or a system-on-chip (SoC) or system-in-package (SIP) chip containing a modem module. It may also be a logic module or software capable of implementing all or part of the functions of the network device. For ease of description, the following explanation uses the execution by a network device as an example. It includes: a transceiver unit for receiving SRS. The SRS is obtained through SRS sequence mapping. The SRS sequence may include multiple independent SRS sub-sequences. The multiple SRS sub-sequences correspond one-to-one with multiple frequency bands. A processing unit for performing channel estimation based on the SRS.

[0041] In one possible design, the first SRS subsequence corresponds to the first frequency band, and the first SRS subsequence can be determined based on the cyclic shift parameter and the SRS base sequence corresponding to the first frequency band. The first SRS subsequence can be any one of multiple SRS subsequences.

[0042] In one possible design, the first SRS subsequence is determined based on the cyclic shift parameters and SRS base sequence corresponding to the first frequency band, and may include: the first SRS subsequence is determined based on one or more of the cyclic shift parameters, SRS base sequence, and parameters for adjusting the phase corresponding to the first frequency band.

[0043] In one possible design, at least two frequency bands have different analog weights. Alternatively, all frequency bands have the same analog weights.

[0044] In one possible design, the beams corresponding to each frequency band in multiple frequency bands are identical, and there is a frequency domain spacing between two adjacent frequency bands. The time-frequency resource location corresponding to the first SRS subsequence can be determined based on one or more of the second parameter, the number of SRS ports, and the SRS power factor. The second parameter represents the time-frequency resource location spacing between two adjacent SRS subsequences. The time-frequency resource location spacing may include the frequency domain spacing.

[0045] In one possible design, the second parameter may include a frequency domain interval and / or a time domain interval. The frequency domain interval may be determined based on one or more of the following: comb tooth degree associated with the frequency domain, the starting frequency domain position, and the mapping bias of the first SRS subsequence. The time domain interval may be determined based on the starting time domain position and / or the time domain bias.

[0046] In one possible design, the mapping bias of the first SRS subsequence can be determined based on one or more of the following: frequency division granularity, number of subcarriers in a resource block, frequency division multibeam scheduling factor, and length of the first SRS subsequence.

[0047] In one possible design, the length of the first SRS subsequence can be determined based on one or more of the frequency-domain-related comb tooth degree, frequency division multi-beam scheduling factor, and frequency domain scaling factor.

[0048] Fifthly, a chip is provided, comprising interface circuitry and one or more processors. The one or more processors are coupled to a memory. The memory stores part or all of a computer program or instructions necessary for implementing the functions described in the first aspect. The one or more processors are executable to carry out the computer program or instructions, causing the communication device to implement any possible design or implementation method described in the first aspect. The interface circuitry is used to implement communication functions within the communication device and / or communication functions between the communication device and other devices or components.

[0049] Sixthly, a chip is provided, comprising interface circuitry and one or more processors. The one or more processors are coupled to a memory. The memory stores part or all of a computer program or instructions necessary for implementing the functions described in the second aspect above. The one or more processors are executable to carry out the computer program or instructions, causing the communication device to implement any possible design or implementation method described in the second aspect above. The interface circuitry is used to implement communication functions within the communication device and / or communication functions between the communication device and other devices or components.

[0050] A seventh aspect provides a computer-readable storage medium. The computer-readable storage medium stores computer instructions; when the computer instructions are executed on a computer, the computer causes the computer to perform a communication method as designed in any of the foregoing aspects.

[0051] Eighthly, a computer program product is provided. The computer program product includes a computer program or instructions that, when executed on a computer, cause the computer to perform a communication method as designed in any of the foregoing aspects.

[0052] The beneficial effects of the methods in any of the second to eighth aspects mentioned above can be referred to the description of the beneficial effects of the methods in the first aspect, and will not be repeated here. Attached Figure Description

[0053] Figure 1 is a schematic diagram of the architecture of a communication system applied in an embodiment of this application;

[0054] Figure 2 is a schematic diagram of a hybrid beamforming architecture;

[0055] Figure 3 is a schematic diagram of a frequency division multi-beam hybrid beamforming architecture;

[0056] Figure 4 is a schematic diagram of a frequency division multiple beam;

[0057] Figure 5 is a schematic diagram of frequency hopping transmission of a detection reference signal;

[0058] Figure 6 is a schematic diagram showing the different comb tooth ratios;

[0059] Figure 7 is a schematic diagram of an SRS port channel response;

[0060] Figure 8 is a schematic diagram of the relationship between SRS frequency hopping and frequency division multiple beam provided in an embodiment of this application;

[0061] Figure 9 is a schematic diagram of another SRS frequency hopping and frequency division multiple beam relationship provided in an embodiment of this application;

[0062] Figure 10 is a schematic diagram of a communication method provided in an embodiment of this application;

[0063] Figure 11 is a schematic diagram of an SRS sub-sequence provided in an embodiment of this application;

[0064] Figure 12 is a schematic diagram of another SRS sub-sequence provided in an embodiment of this application;

[0065] Figure 13 is a schematic diagram of a communication device provided in an embodiment of this application;

[0066] Figure 14 is a schematic diagram of another communication device provided in an embodiment of this application. Detailed Implementation

[0067] Figure 1 is a schematic diagram of the architecture of a communication system 1000 provided in an embodiment of this application. As shown in Figure 1, the communication system 1000 includes a radio access network (RAN) 100, wherein the RAN 100 includes at least one RAN node (110a and 110b in Figure 1, collectively referred to as 110), and may also include at least one terminal (120a-120j in Figure 1, collectively referred to as 120). The RAN 100 may also include other RAN nodes, such as wireless relay devices and / or wireless backhaul devices (not shown in Figure 1). The terminal 120 is wirelessly connected to the RAN node 110. Terminals and RAN nodes can be interconnected via wired or wireless means. The communication system 1000 may also include a core network 200. The RAN node 110 is connected to the core network 200 via wireless or wired means. The core network equipment in core network 200 and the RAN node 110 in RAN 100 can be independent and different physical devices, or they can be the same physical device that integrates the logical functions of the core network equipment and the logical functions of the RAN node. Communication system 1000 may also include Internet 300.

[0068] RAN100 can be an evolved universal terrestrial radio access (E-UTRA) system, a new radio (NR) system, a future communications network, or a future radio access system as defined in the 3rd generation partnership project (3GPP). RAN100 can also include two or more of the above-mentioned different radio access systems. RAN100 can also be an open RAN (O-RAN).

[0069] RAN nodes, also known as radio access network devices, RAN entities, or access nodes, are used to help terminals access communication systems wirelessly. In one application scenario, an RAN node can be a base station (BS), an evolved NodeB (eNodeB / eNB), a transmission reception point (TRP), a generation NodeB (gNB) in a 5th generation (5G) mobile communication system, a future base station in a future communication network, or a base station in a future mobile communication system. RAN nodes can be macro base stations (as shown in Figure 1, 110a), micro base stations or indoor stations (as shown in Figure 1, 110b), relay nodes, or master nodes.

[0070] In another application scenario, multiple RAN nodes can collaborate to help terminals achieve wireless access, with different RAN nodes implementing different functions of the base station. For example, a RAN node can be a central unit (CU), a distributed unit (DU), or a radio unit (RU). An RU can also be called a radio frequency unit. Here, the CU performs the functions of the base station's radio resource control protocol and packet data convergence protocol (PDCP), and can also perform the functions of the service data adaptation protocol (SDAP). The DU performs the functions of the base station's radio link control layer and medium access control (MAC) layer, and can also perform some or all of the physical layer functions. For specific descriptions of these protocol layers, refer to the relevant 3GPP technical specifications. The RU can be used to implement radio frequency signal transmission and reception. The CU and DU can be two independent RAN nodes, or they can be integrated into the same RAN node, such as within a baseband unit (BBU). RUs can be included in radio frequency equipment, such as remote radio units (RRUs) or active antenna units (AAUs). CUs can be further divided into two types of RAN nodes: CU-control plane and CU-user plane.

[0071] In different systems, RAN nodes may have different names. For example, in an open radio access network (O-RAN) system, a CU can be called an open CU (O-CU), a DU can be called an open DU (O-DU), and an RU can be called an open RU (O-RU). The RAN nodes in the embodiments of this application can be implemented through software modules, hardware modules, or a combination of software and hardware modules. For example, an RAN node can be a server loaded with the corresponding software modules. The embodiments of this application do not limit the specific technology or device form used in the RAN nodes. For ease of description, a base station is used as an example of a RAN node in the following description.

[0072] A terminal is a device with wireless transceiver capabilities, capable of sending signals to or receiving signals from a base station. Terminals can also be called terminal equipment, user equipment (UE), mobile station, mobile terminal, etc. Terminals can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, smart transportation, smart cities, etc. Terminals can be mobile phones, tablets, computers with wireless transceiver capabilities, wearable devices, vehicles, airplanes, ships, robots, robotic arms, smart home devices, etc. The embodiments of this application do not limit the specific technology or device form used in the terminal.

[0073] In some examples, the core network 200 may include any core network device such as the access and mobility management function (AMF) entity, the session management function (SMF) entity, the user plane function (UPF) entity, the sensing service control function (SSCF), the sensing data processing function (SDPF), and the unified data management (UDM).

[0074] Base stations and terminals can be fixed or mobile. They can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can be deployed on aircraft, balloons, and satellites. The embodiments of this application do not limit the application scenarios of the base stations and terminals.

[0075] The roles of base stations and terminals can be relative. For example, the helicopter or drone 120i in Figure 1 can be configured as a mobile base station. For terminals 120j that access the wireless access network 100 through 120i, terminal 120i is a base station; however, for base station 110a, 120i is a terminal, meaning that 110a and 120i communicate via a wireless air interface protocol. Of course, 110a and 120i can also communicate via a base station-to-base station interface protocol. In this case, relative to 110a, 120i is also a base station. Therefore, both base stations and terminals can be collectively referred to as communication devices. 110a and 110b in Figure 1 can be called communication devices with base station functions, and 120a-120j in Figure 1 can be called communication devices with terminal functions.

[0076] Communication between base stations and terminals, between base stations, and between terminals can be conducted using licensed spectrum, unlicensed spectrum, or both simultaneously. Communication can be conducted using spectrum below 6 GHz, spectrum above 6 GHz, or both simultaneously. The embodiments of this application do not limit the spectrum resources used for wireless communication.

[0077] In the embodiments of this application, the functions of the base station can be executed by modules (such as chips) within the base station, or by a control subsystem that includes base station functions. This control subsystem, including base station functions, can be a control center in the aforementioned application scenarios such as smart grids, industrial control, intelligent transportation, and smart cities. Similarly, the functions of the terminal can be executed by modules (such as chips or modems) within the terminal, or by a device that includes terminal functions.

[0078] In a wireless communication system, communication devices are included, and these devices can communicate wirelessly using air interface resources. These communication devices can include network devices and terminal devices; network devices can also be called base station devices, i.e., the wireless access network devices mentioned above. Air interface resources can include at least one of time-domain resources, frequency-domain resources, code resources, and spatial resources. These communication devices can also be called communication apparatuses.

[0079] The solutions provided in this application can be applied to wireless communication between communication devices. Wireless communication can include: wireless communication between network devices and terminals, wireless communication between network devices, and wireless communication between terminals. In this application, the term "wireless communication" can also be simply referred to as "communication," and the term "communication" can also be described as "data transmission," "information transmission," or "transmission."

[0080] A beam can be considered the direction of electromagnetic wave radiation in an antenna system, while beamforming is the process of forming a beam. In a multi-antenna system, beamforming is a process of adjusting the amplitude or phase of signals on the radio frequency (RF) link to create a directional electromagnetic wave radiation direction. The RF link can be divided into digital RF links and analog RF links; therefore, beamforming can also be divided into digital beamforming and analog beamforming.

[0081] First, the communication terms that may be involved in the subsequent embodiments of this application will be explained.

[0082] Digital beamforming:

[0083] Digital beamforming is a wireless communication technology that achieves precise control of the antenna beam by weighting the amplitude and phase of the signal during baseband processing. The physical signal received by each antenna element is converted into a digital signal, which is then weighted and synthesized by a digital signal processor to form a directional beam. The advantages of digital beamforming include high precision, allowing for accurate control of the beam's shape and direction. It can support simultaneous transmission of multiple data streams, enabling parallel processing of multiple beams and improving system flexibility and performance. However, digital beamforming also has certain disadvantages, such as requiring high baseband processing capabilities, necessitating a dedicated RF link for each data stream, increasing system load, expanding equipment size, and raising costs.

[0084] In various embodiments of this application, the antenna vibrator may also be referred to as an antenna array element, antenna, etc.

[0085] Simulated beamforming:

[0086] Analog beamforming primarily works by processing radio frequency (RF) signal weights and using hardware devices such as analog phase shifters to adjust the antenna phase during the RF phase to form a directional beam. The advantages of this method are its relatively low cost and simplicity of implementation, making it suitable for scenarios where cost control is critical. However, its disadvantage is its limited flexibility; it typically only generates one beam and is not suitable for scenarios requiring high performance and flexible beam management.

[0087] Hybrid beamforming (HBF):

[0088] Considering that the size of a single antenna element decreases with increasing carrier frequency, and the signal coverage problem caused by increased propagation loss at high frequencies also needs to be addressed, the number of physical antennas for transmitting or receiving signals will become very large, essentially equal to the number of analog RF links. However, the number of digital RF links is much smaller than the number of analog RF links. Therefore, a scheme where one digital RF link corresponds to multiple analog RF links can be considered, i.e., the HBF scheme. As shown in Figure 2, this combines digital beamforming and analog beamforming. For example, after digital beamforming, multiple digital radio frequency (RF) chains can be connected, and each digital RF chain can connect to multiple phase shifters. Each phase shifter can be considered to correspond to one analog RF link. This HBF architecture combines the advantages of both analog and digital beamforming.

[0089] In some technologies, a frequency division multi-beam (HBF) architecture has been proposed, which can be considered a type of HBF architecture. The key feature of this HBF architecture is that the analog beamforming part is implemented using analog devices such as time delay units, rather than traditional phase shifters. Frequency division multi-beaming is achieved by forming beams in different directions across multiple frequency bands.

[0090] It is evident that traditional analog beamforming generates a single beam across the entire frequency band, resulting in a relatively fixed and uniform beam pattern in the traditional HBF architecture, lacking flexibility in frequency domain resource scheduling. Furthermore, the consistent beam direction across the entire bandwidth is unfavorable for small data packet services. For example, when a specific beam direction is used for a particular data packet, due to the packet's small size, it needs to be transmitted quickly, requiring adjustment of the beam direction before transmitting the remaining small data packets, causing significant latency and impacting user experience. Downlink measurements, channel state information (CSI) reporting, uplink measurements, and beamforming during signal measurement processes require time-division multiplexing, resulting in substantial time-domain resource overhead and increased resource scheduling latency.

[0091] Referring to Figure 3, a frequency division multi-beam (HBF) architecture is shown. Similar to the HBF architecture shown in Figure 2, the difference is that the phase shifter is replaced by a time delayer. Referring to Figure 4, a schematic diagram of a frequency division multi-beam architecture is shown. It can be seen that based on the architecture shown in Figure 3, a complete bandwidth can be divided into multiple different frequency bands, such as frequency band 1, frequency band 2, and frequency band 3. Different analog weights can be used for different frequency bands so that each frequency band corresponds to a different beam. For example, frequency band 1 corresponds to beam 1, frequency band 2 corresponds to beam 2, and frequency band 3 corresponds to beam 3. Under this architecture, multiple terminals in different directions can be scheduled simultaneously, thereby improving the user's service experience. It is understood that in the various embodiments of this application, "frequency band" and "frequency band" can be used interchangeably.

[0092] It is understood that the aforementioned frequency division multiple beam (HFDF) can also be referred to as frequency division beam, multi-beam scenario, frequency division multiplexing beam scenario, etc., and this application embodiment does not limit the name. It should be considered that by dividing a frequency band into multiple sub-bands, different sub-bands can correspond to different analog weights, or different sub-bands can correspond to different beams, or different sub-bands can correspond to different quasi co-location (QCL) types D, etc., all of which can be considered as belonging to the frequency division multiple beam (HBF) scenario mentioned in this application.

[0093] For a terminal, an uplink reference signal can be sent to the network device for monitoring and channel estimation of the uplink channel. This uplink reference signal can be, for example, a sounding reference signal (SRS). In a time-division duplex (TDD) system, the reciprocity between the uplink and downlink channels can be utilized to estimate the downlink channel based on measurements of the SRS. The network device can then use the obtained channel estimation results to perform resource scheduling for the terminal or determine precoding weights for downlink operations.

[0094] SRS signals are carried through SRS ports, which are also called ports, antenna ports (APs), etc. Each SRS port corresponds to one SRS. Different SRS ports can be multiplexed using code division, frequency division, time division, or space division. In some examples, an SRS resource can be considered to include 1, 2, or 4 SRS ports. The number of SRS ports can be denoted as... Then it can be considered Each SRS port can be configured with specific time-frequency code resources. Typically, each SRS port can use different time-frequency code resources to reduce mutual interference. In some examples, each SRS port can correspond to either the terminal's physical antenna or a virtual antenna.

[0095] In some examples, for different SRS ports, the terminal can use code division multiplexing to transmit SRS on the same time-frequency resources. Code division multiplexing can be implemented by introducing a phase shift factor into the SRS sequence in the frequency domain. This operation can be equivalently viewed as a cyclic shift (CS) offset in the time domain of the SRS sequence. Taking advantage of the often finite maximum channel delay, code division orthogonality can be achieved between different SRS ports. The aforementioned SRS sequence can be considered as the sequence value of the SRS before resource mapping. The CS mentioned above applies to the SRS sequence to be transmitted. Since the frequency and time domains of the sequence can be converted using methods such as Fourier transform, adding a phase shift in the frequency domain is equivalent to applying a CS offset in the time domain. Applying different offsets to different SRS can achieve the effect of time-frequency resource multiplexing.

[0096] The SRS measurement bandwidth can be considered as the total bandwidth for channel measurement performed by the network device using SRS. In the embodiments of this application, channel measurement and channel estimation can be considered to have the same meaning. The time when the SRS signal is transmitted can be called the SRS transmission time. For each SRS transmission time, the SRS resource can transmit SRS on the entire SRS measurement bandwidth, or it can choose to transmit SRS on a portion of the SRS measurement bandwidth. This act of transmitting SRS on a portion of the SRS measurement bandwidth can be called SRS frequency hopping transmission. Accordingly, this portion of bandwidth can be called the SRS frequency hopping bandwidth. The terminal can transmit different SRS signals at multiple SRS transmission times, so that the network device can measure the entire SRS measurement bandwidth based on the multiple SRS transmitted by the SRS frequency hopping. Referring to Figure 5, each of these can be considered to represent a sub-band in the frequency domain, such as a resource block (RB). Assuming the SRS measurement bandwidth is 16 RBs and the SRS frequency hopping bandwidth is 4 RBs, SRS frequency hopping transmission can be achieved through 4 SRS transmission times so that the network device can complete the measurement of the SRS measurement bandwidth.

[0097] For one or more SRS ports mentioned above, terminals can transmit their respective SRS on different frequency domain subcarriers using frequency division multiplexing (FDM). The frequency domain can be divided at the resource element (RE) granularity. One RB can include 12 REs. One RE corresponds to one orthogonal frequency division multiplexing (OFDM) symbol and one subcarrier in the frequency domain. Different frequency domain division methods can be called different combs. Combs can divide frequency domain subcarriers into multiple groups, with a fixed frequency domain spacing between the two subcarriers in each group. One implementation method is to distinguish different subcarriers in the frequency domain based on comb offset (CO). Different comb offset values ​​represent different subcarrier groups or the positions of frequency domain subcarriers. A subcarrier group can be considered as a subcarrier group divided based on comb offsets. SRS resources can achieve frequency division multiplexing between SRS ports by assigning different comb offset values ​​to different SRS ports. Referring to Figure 6, the comb teeth can be viewed as equally spaced subcarriers extracted in the frequency domain. The extraction interval can be called the comb tooth degree, denoted as K. TC The comb tooth angle can be pre-configured via radio resource control (RRC). For example, values ​​of 2, 4, or 8 can be used. For K... TC When the value is 2, the frequency domain can be divided into two comb teeth for frequency division multiplexing of the two sets of SRS ports. For K TC When the value is 4, the frequency domain can be divided into 4 comb teeth, which can be used for frequency division multiplexing of 2 or 4 SRS ports. Of course, for frequency division multiplexing of 2 SRS ports, any 2 of the 4 comb teeth can be used, and the remaining comb teeth can be idle. Similarly, for K... TC The case with a value of 8 is similar to the case with a value of 4, and will not be described again in this embodiment. Each square in Figure 6 can be considered as corresponding to a subcarrier, or as an RE. The shaded squares can be considered as the subcarriers occupied by the comb teeth with a comb tooth offset value of 0 under different comb tooth degrees. They can also be considered as multiple subcarriers (or REs) belonging to the same subcarrier group.

[0098] For SRS resources configured by network devices for terminals, different SRS ports within an SRS resource correspond to different time-frequency resources or SRS sequences, thereby ensuring orthogonality between different SRS ports. The i-th SRS port in the SRS resource can be denoted as p. i The pi The corresponding SRS sequence can be represented by Equation 1.

[0099] in, p i The SRS sequence corresponding to the port. n is the number of the sequence element. The SRS base sequence can be, for example, a ZC sequence. The generation method of the SRS base sequence can be determined based on the sequence length; specific details can be found in relevant technologies, which will not be elaborated upon here. u and v can jointly represent a base sequence within the SRS base sequence group. For different SRS sequence lengths, at least 30 base sequences can be used. These base sequences can be further divided into 30 base sequence groups, each corresponding to a group number u. The value of u can be any integer from 0 to 29. Under the same SRS sequence length, an SRS base sequence group can include 1 to 2 SRS base sequences, which can be represented by the sequence number v. v is 0 or 1. j is the imaginary part, and e is the natural constant. δ = log2(K TC ). The length of the SRS sequence. This indicates the number of subcarriers within an RB, and m represents the number of RBs occupied by the SRS in a single frequency hopping transmission.

[0100] For α in Formula 1 above i p i The CS (Cyclic Switching) value in the code domain corresponding to the port. For an SRS sequence in the frequency domain, this CS is the phase offset applied to the SRS base sequence, for example, by multiplying the signal in the frequency domain by... This can be equivalent to cyclically shifting the signal in the time-delay domain according to the corresponding time delay. Specifically, for an SRS port p in an SRS resource... i The α corresponding to this SRS port i It can be determined using formulas 2 and 3.

[0101] in, This indicates the reference position of the CS occupied by multiple ports corresponding to the SRS resources allocated to the terminal by the network device; it can also be called the starting position. It can be configured through RRC parameters, for example, through the "transmissionComb" parameter. This represents the maximum possible value for supported CS (Clients / Servers), or it can be considered the maximum number of configurable CS. In some examples, With support of K TC Combined configurations are possible. For example, similar to those shown in Table 1. With KTC The relationship.

[0102] Table 1

[0103] Of course, Table 1 only shows one possible correspondence, and the specific correspondence can be adjusted arbitrarily according to the actual situation. This application embodiment does not limit it here. For example, assume that the number of SRS ports corresponding to SRS resource 1 configured for the terminal by the network device is... It is 4. Take 0, K TC The value is 2. According to Table 1, The value is 8. The distribution of the estimated channel responses in the time delay domain for the four SRS ports corresponding to SRS resource 1 can be seen in Figure 7. SRS port 0 corresponds to CS 0, SRS port 1 corresponds to CS 2, SRS port 2 corresponds to CS 4, and SRS port 3 corresponds to CS 6. The time delay domain channel response for each port can be seen in the clusters of vertical lines in the boxes below each port. Each vertical line represents a channel response. Typically, when allocating CS for an SRS resource, the CS corresponding to each SRS port of that SRS resource is considered... The length is divided as evenly as possible according to the maximum interval, so as to minimize the interference between multiple SRS ports of the SRS resource.

[0104] In some examples, SRS port p i The CO in the corresponding frequency domain can be represented by parameters. This indicates that, for this SRS port p i Starting frequency domain position It can be determined using Formula 4.

[0105] in, It is expressed as the offset of the frequency domain subband. You can refer to Formula 5 to determine this.

[0106] in, This indicates comb tooth offset. This indicates the configured frequency domain RB offset. It can be determined based on Formula 6.

[0107] in, Configuration can be achieved through higher-level signaling, such as RRC signaling, for example, through "transmissionComb" signaling. Based on formulas 4, 5, and 6 above, the values ​​for different numbers of SRS ports and... Multiple SRS ports of an SRS resource may be distributed on the same comb tooth or on different comb teeth.

[0108] In the aforementioned Frequency Division Multiple Beam (HBF) architecture, due to the physical limitations of analog devices, there are two forms of HBF. One is to divide the frequency into multiple continuous bandwidths, as shown in Figure 8, where the complete bandwidth is divided into band 1, band 2, and band 3. Each band uses the same analog weights. The other HBF method is a comb-like frequency division, as shown in Figure 9, where the bands in the white area use the same analog weights, and the bands in the black area use the same analog weights. It can be understood that bands using the same analog weights can be considered to correspond to the same beam. However, during SRS frequency hopping transmission at the terminal, some SRS frequency hopping transmissions may cover bands using different analog weights, such as the areas circled in Figures 8 and 9. That is, the SRS frequency hopping and the frequency division method of the network device are not aligned. This can lead to the network device being unable to accurately estimate the channel.

[0109] Therefore, this application provides a communication method that determines independent SRS sub-sequences for different frequency bands. After resource mapping of multiple independent SRS sub-sequences, the terminal transmits the complete SRS sequence. This ensures improved accuracy of channel estimation by network devices in the case of SRS frequency hopping transmission.

[0110] The communication method and apparatus will be further described below with reference to the accompanying drawings. It is understood that the embodiments of this application use a terminal and a network device as examples to illustrate the execution of the interaction, but this application does not limit the execution subject of the interaction. The method executed by the terminal in this application can also be implemented by a module in the terminal (e.g., a circuit, chip, or chip system), or a logical node, logical module, or software that can implement all or part of the terminal's functions. The method executed by the network device in this application can also be implemented by a module in the network device (e.g., a circuit, chip, or chip system), or a logical node, logical module, or software that can implement all or part of the network device's functions. In the embodiments of this application, the network device can be considered as an access network device.

[0111] In the embodiments of this application, the term "wireless communication" can also be abbreviated as "communication", and the term "communication" can also be described as "data transmission", "information transmission" or "transmission".

[0112] Figure 10 is a schematic diagram of a communication method provided in an embodiment of this application.

[0113] This communication process is applicable to, but not limited to, the communication scenarios shown in Figure 1. This method can be applied to LTE, LTE frequency division duplex (FDD) systems, LTE TDD, 5G systems, or NR systems, as well as future communication systems (such as future communication systems), and V2X. V2X can include vehicle-to-network (V2N), vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P), long-term evolution-vehicle (LTE-V), vehicle-to-everything (V2X), MTC, IoT, long-term evolution-machine (LTE-M), machine-to-machine (M2M), and D2D wireless communication scenarios.

[0114] In some examples, single transmission and receiving point (TRP) and / or multi-TRP scenarios, and their derivative scenarios, may also be included. The time-domain units involved in the embodiments of this application may be slots, transmission time intervals (TTI), subframes, and / or mini-slots, etc. The frequency-domain units involved in the embodiments of this application may be base stations, subcarriers, and / or frequency bands (also referred to as frequency-domain sub-bands). The network devices in the embodiments of this application may be base stations, TRPs, etc. The terminals may be UEs, relays, customer premises equipment (CPEs), etc.

[0115] The method may include the following steps:

[0116] S101, the terminal determines the SRS sequence.

[0117] In some examples, an SRS sequence may include multiple independent SRS sub-sequences. For instance, a terminal can independently generate each SRS sub-sequence. These multiple SRS sub-sequences correspond one-to-one with multiple frequency bands. That is, each SRS sub-sequence corresponds to a frequency band, or it can be considered that the terminal generates the corresponding SRS sub-sequence for each frequency band.

[0118] It is understandable that in Figures 8 and 9, each SRS frequency hopping transmission corresponds to an SRS sequence, and this SRS sequence is generated only once. Therefore, the different simulated weights corresponding to different frequency bands for this once-generated SRS sequence cause network devices to be unable to accurately perform channel estimation based on the SRS sequence. However, in the embodiments of this application, corresponding SRS sub-sequences are generated independently for each frequency band. Since the simulated weights used for the frequency bands corresponding to each SRS sub-sequence are the same, the situation in Figures 8 and 9 will not occur, that is, there will be no different simulated weights corresponding to different frequency bands.

[0119] S102, For the first SRS subsequence, map the first SRS subsequence to the frequency band corresponding to the first SRS subsequence.

[0120] The first SRS subsequence can be any one of multiple independent SRS subsequences. In other words, the terminal can map any SRS subsequence to the frequency band corresponding to that SRS subsequence.

[0121] For example, in S101, the terminal independently generates SRS subsequence 1, SRS subsequence 2, and SRS subsequence 3. SRS subsequence 1 corresponds to frequency band 1, SRS subsequence 2 corresponds to frequency band 2, and SRS subsequence 3 corresponds to frequency band 3. The terminal can map SRS subsequence 1 to frequency band 1, SRS subsequence 2 to frequency band 2, and SRS subsequence 3 to frequency band 3.

[0122] S103, the terminal sends an SRS to the network device. Correspondingly, the network device receives the SRS from the terminal.

[0123] In some examples, in S102, the terminal performs resource mapping on each SRS subsequence and transmits the mapped SRS subsequence signal on the corresponding resources. Considering the entire frequency band, it can be assumed that the terminal transmitted SRS. That is, the SRS is obtained based on the resource mapping of each SRS subsequence. Of course, if each SRS subsequence is considered as a whole, it can be considered that the SRS subsequences constitute an SRS sequence. Therefore, the SRS can also be considered to be obtained through SRS sequence mapping.

[0124] In the various embodiments of this application, the “resource mapping” involved can be considered as mapping an SRS sequence or an SRS subsequence to a corresponding frequency band.

[0125] S104, Network devices perform channel estimation based on SRS.

[0126] For example, the network device can perform channel estimation based on the SRS received in S103. For instance, the network device can measure the SRS and obtain the corresponding channel estimation result based on the measurement result. It is clear that each frequency band independently generates its own corresponding SRS sub-sequence, and the terminal transmits the corresponding signal after resource mapping based on each SRS sub-sequence. In various embodiments of this application, the signal after resource mapping of the SRS sub-sequence can be called an SRS sub-signal. During the SRS measurement process, the network device can measure each SRS sub-signal. Since the frequency band corresponding to the SRS sub-signal uses the same analog weight, that is, the SRS sub-sequence corresponding to that frequency band uses the same analog weight during generation, the network device can obtain a more accurate channel estimation result based on the SRS sub-signal. For a single SRS frequency hopping transmission, the network device can perform channel estimation for each frequency band corresponding to this SRS frequency hopping transmission that uses the same analog weight. From an overall perspective, it can be considered that the network device has performed an accurate channel estimation for the entire frequency band corresponding to the SRS frequency hopping transmission.

[0127] In scenarios where the full bandwidth is divided into multiple SRS frequency hopping transmissions, the above method can be used for each SRS frequency hopping transmission. This allows network devices to ultimately perform accurate channel estimation of the full bandwidth.

[0128] In this embodiment, the terminal can determine independent SRS sub-sequences for different frequency bands. The terminal can also perform resource mapping and transmission for each independent SRS sub-sequence. This allows network devices to perform more accurate channel estimation in the case of SRS frequency hopping transmission.

[0129] In the communication method provided in this application embodiment, for the case where each frequency band corresponds to a separate SRS subsequence, the SRS sequence corresponding to a single SRS frequency hopping transmission can be considered as being obtained by splicing multiple SRS subsequences. It should be understood that the splicing mentioned here does not actually merge the SRS subsequences into a single SRS sequence before resource mapping. Rather, when resource mapping is performed separately for each SRS subsequence, it can be viewed as concatenating the SRS subsequences to obtain the SRS sequence and then transmitting it.

[0130] In some embodiments, the hypothetical network device shown in Figure 9 divides the entire bandwidth into frequency bands in a comb-like manner. Assume the entire bandwidth is divided into four frequency bands, where the length of the first comb tooth is M1, the length of the second comb tooth is M2, the length of the third comb tooth is M3, and the length of the fourth comb tooth is M4. If RB is the smallest frequency band unit, the length of each comb tooth can include one or more RBs. Alternatively, if RE is the smallest frequency band unit, the length of each comb tooth can include one or more REs. Accordingly, the length of the SRS subsequence corresponding to the first comb tooth is M1, the length of the SRS subsequence corresponding to the second comb tooth is M2, the length of the SRS subsequence corresponding to the third comb tooth is M3, and the length of the SRS subsequence corresponding to the fourth comb tooth is M4. Therefore, the total length M of the SRS sequence transmitted in this SRS frequency hopping transmission can be M1 + M2 + M3 + M4.

[0131] In some examples, suppose the frequency band corresponding to one SRS frequency hopping transmission can be divided into X frequency bands, and the SRS sequence can be referenced from the formula.

[0132] Equation 7 is determined.

[0133] It can be seen that each row in Formula 7 can be considered as corresponding to an SRS subsequence, and the SRS subsequence can be independently generated according to the frequency band corresponding to the SRS subsequence. Among them, α in Formula 7 can be considered as the α used by the SRS port corresponding to this SRS frequency hopping transmission, so the subscript i is not used to distinguish different SRS ports.

[0134] As can be seen from Formula 7 above, for any SRS subsequence, such as the first SRS subsequence, assuming that the frequency band corresponding to the first SRS subsequence is the first frequency band, then the first SRS subsequence can be determined based on the cyclic shift parameter corresponding to the first frequency band and the SRS base sequence. Here, the cyclic shift parameter corresponding to the first frequency band is α in Formula 7, and the corresponding base sequence is... Where x takes the value of any positive integer between 1 and X. The specific method for generating the base sequence can be referred to the description related to Formula 1, which will not be repeated here in the embodiments of this application. X can be considered as the number of frequency bands or the number of SRS sub-sequences. For example, referring to Figure 11, it can be clearly seen that in one SRS frequency hopping transmission, independent SRS sub-sequences are generated for each frequency band.

[0135] This application embodiment generates SRS sub-sequences corresponding to each frequency band. In the case of SRS frequency hopping transmission, the terminal can perform resource mapping and transmission for each SRS sub-sequence to improve the accuracy of channel estimation of network devices.

[0136] In some embodiments, considering that the phase changes between adjacent SRS subsequences generated for each frequency band are not smooth, the peak-to-average power ratio (PAPR) of the final SRS sequence will increase. If this PAPR reaches a certain value, it can cause power back-off when the terminal transmits the signal. Therefore, to reduce PAPR and avoid power back-off, a parameter, denoted as θ, can be introduced for each frequency band to adjust the corresponding phase. By introducing θ to adjust the phase, the smoothness of the phase is increased.

[0137] For example, based on Equation 7, with the introduction of θ, the SRS sequence can be further adjusted to be determined by Equation 8.

[0138] As can be seen, for the first SRS subsequence, since there are no other SRS subsequences preceding it, there is no need to consider introducing θ. For the second SRS subsequence, θ1 is introduced to adjust the phase, and this process continues until the last SRS subsequence.

[0139] In some examples, θ can also be referred to as the initial phase of the sequence, etc., but this application does not limit the specific terminology used in the embodiments.

[0140] It is clear that Formulas 7 and 8 are merely one possible way to determine the SRS sequence, or one way to determine the SRS subsequence. In other examples, the first SRS subsequence can be determined based on one or more of the following: the cyclic shift parameter corresponding to the first frequency band, the SRS base sequence, and the parameter used to adjust the phase corresponding to the first frequency band. For example, if determined based on the cyclic shift parameter and the SRS base sequence, refer to Formula 7. Alternatively, it can be determined based on the SRS base sequence and the parameter used to adjust the phase corresponding to the first frequency band. Yet another example is that it can be determined solely based on the parameter used to adjust the phase corresponding to the first frequency band; in this case, the remaining parameters can be fixed values ​​predefined by the protocol. For ease of description, the embodiments of this application will not list all the various combinations of the above-mentioned multiple parameters for determining the SRS subsequence.

[0141] In some cases, the corresponding θ for each frequency band can be indicated directly by signaling sent by network devices. This could be done via RRC signaling, media access control (MAC) control element (CE), or downlink control information (DCI).

[0142] In other examples, the value of θ corresponding to each frequency band can also be a predefined value in the protocol. In still other examples, the difference between θ corresponding to adjacent frequency bands can be specified, assuming that the difference between θ corresponding to each adjacent frequency band is fixed. In this case, it is sufficient to indicate only one θ and the difference. Alternatively, if the difference is predefined in the protocol, then indicating only one θ is sufficient. This application does not limit the method of indicating θ.

[0143] This application embodiment introduces parameters for adjusting the phase corresponding to the frequency band to reduce the PAPR of the SRS sequence, thereby avoiding power back-off.

[0144] In the communication method provided in this application embodiment, the above-mentioned independent generation of SRS sub-sequences for each frequency band can be illustrated in one case, as shown in Figure 11. For multiple frequency bands with different analog weights, corresponding SRS sub-sequences can be generated. Of course, Figure 11 only shows the method of dividing the frequency bands using a comb-like pattern. In some examples, it can also be applied to the case shown in Figure 8, where the frequency bands are divided into multiple consecutive frequency bands. That is to say, in this case, among the multiple frequency bands corresponding to multiple SRS sub-sequences, at least two frequency bands have different analog weights.

[0145] In other scenarios, for multiple frequency bands corresponding to multiple SRS subsequences, the analog weights for each frequency band can be the same. That is, the terminal can generate corresponding SRS subsequences for frequency bands with the same analog weights, without considering generating separate SRS subsequences for frequency bands with different analog weights. For example, referring to Figure 12, for each frequency band of the same SRS frequency hopping transmission, separate SRS subsequences can be generated for frequency bands with the same analog weights. Since these SRS subsequences use the same analog weights during generation, the network device can perform joint channel estimation on the signals mapped from these SRS subsequences, thereby ensuring a relatively accurate channel estimation result for the corresponding frequency band.

[0146] In some embodiments, for the scenario shown in Figure 12, there is a frequency domain interval between two adjacent frequency bands in multiple frequency bands. The terminal can then determine a second parameter. This second parameter represents the time-frequency resource location interval between two adjacent SRS subsequences, which includes the aforementioned frequency domain interval between the two frequency bands. The terminal performs resource mapping on the first SRS subsequence based on the time-frequency resource location corresponding to the first SRS subsequence.

[0147] For example, for a first SRS subsequence, the terminal can determine the time-frequency resource location corresponding to the first SRS subsequence based on one or more of the second parameter, the number of SRS ports, and the SRS power factor. The second parameter can be represented by Y. For instance, the terminal can determine the time-frequency resource location corresponding to the first SRS subsequence based on the second parameter, the number of SRS ports, and the SRS power factor. Alternatively, the terminal can determine the time-frequency resource location corresponding to the first SRS subsequence based on the second parameter and the SRS power factor. Or, the terminal can determine the time-frequency resource location corresponding to the first SRS subsequence based on the second parameter and the number of SRS ports, and so on. The remaining parameters can be predefined by the protocol. For ease of description, the embodiments of this application will not list all the parameter combinations for determining the time-frequency resource location corresponding to the first SRS subsequence here.

[0148] This application embodiment can determine the SRS sub-sequence of each frequency band when there is a frequency domain gap between adjacent frequency bands. This allows network devices to perform joint channel estimation based on the SRS signals corresponding to non-adjacent frequency bands, thereby improving the accuracy of channel estimation.

[0149] For cases where the terminal determines the time-frequency resource location corresponding to the first SRS subsequence based on the second parameter, the number of SRS ports, and the SRS power factor, Formula 9 can be referenced.

[0150] in, The number of symbols used in the SRS sequence. β SRS For SRS power factor, k represents the number of SRS ports. offset The mapping bias is for the first SRS subsequence.

[0151] As can be seen from Equation 9, the second parameter Y can include the frequency domain interval and / or the time domain interval. The frequency domain interval is... The frequency domain interval is l'+l0 in Equation 9. For example, the frequency domain interval can be determined based on one or more of the frequency domain-related comb tooth degree, the starting frequency domain position, and the mapping bias of the first SRS subsequence. Equation 9 represents the case where the frequency domain interval is determined based on the frequency domain-related comb tooth degree, the starting frequency domain position, and the mapping bias of the first SRS subsequence. The frequency domain-related comb tooth degree is K. TC The starting frequency domain position is The mapping bias of the first SRS subsequence, i.e., k offset Of course, in other examples, the frequency domain spacing can also be determined based on the comb tooth degree and starting frequency domain position related to the frequency domain, or based on the mapping bias of the first SRS subsequence, etc. Other parameters can be predefined by the protocol. For ease of description, the embodiments of this application will not list the combinations of parameters for determining the frequency domain spacing one by one.

[0152] Similarly, the time-domain interval can be determined based on the initial time-domain position and / or the time-domain offset. The initial time-domain position is l0, and the time-domain offset is l'. For Equation 9, the time-domain interval is determined based on the initial time-domain position and the time-domain offset. In other examples, the time-domain interval can be determined based on the initial time-domain position. Alternatively, the time-domain interval can be determined based on the time-domain offset. The remaining parameters can be predefined by the protocol.

[0153] This application provides a method for determining frequency domain intervals and time domain intervals, so that the terminal can accurately determine the SRS sub-sequences corresponding to each frequency band with frequency domain intervals.

[0154] In some examples, the mapping bias of the first SRS subsequence can be determined based on one or more of the following: frequency division granularity, the number of subcarriers within a resource block, the frequency division multibeam scheduling factor, and the length of the first SRS subsequence. For example, if the mapping bias of the first SRS subsequence is determined based on frequency division granularity, the number of subcarriers within a resource block, the frequency division multibeam scheduling factor, and the length of the first SRS subsequence, Equation 10 can be referenced.

[0155] Among them, K PTC The frequency division granularity can be, for example, the granularity mentioned above in the frequency division multi-beam (HBF) architecture. For instance, if the entire bandwidth is divided into two frequency bands, the granularity can be 2. Alternatively, when multiple frequency bands are divided in a comb-like pattern, the granularity can be the same as the number of analog weights. For example, in Figure 9, there are two analog weights, one corresponding to the white boxes and the other to the black boxes, so the granularity can be 2. Alternatively, the granularity can be determined by the number of frequency bands; the granularity is determined by the number of frequency bands. This application does not limit the specific value of the granularity in its embodiments. That is, the number of subcarriers within a resource block. Where K F That is, the frequency division multiple beam scheduling factor, such as K F The value is a multiple of the frequency granularity. For example, K... F It can be the number of frequency bands contained within a frequency hopping bandwidth. That is, the length of the first SRS subsequence. floor() means rounding down.

[0156] This application provides a method for determining the mapping bias of the first SRS sub-sequence to ensure that the terminal can accurately determine the SRS sub-sequence corresponding to each frequency band with frequency domain spacing.

[0157] In some examples, for k” Unlike the determination method mentioned in the previous examples, in this scenario, It can be determined based on one or more of the following: comb tooth degree, frequency division multibeam scheduling factor, and frequency domain scaling factor, all of which are related to the frequency domain. For example, Determined based on the comb tooth density and frequency domain scaling factor related to the frequency domain. Alternatively, Determined based on the comb tooth degree and frequency division multibeam scheduling factor related to the frequency domain. Alternatively, The parameters are determined based on frequency-domain related factors such as comb tooth density, frequency division multibeam scheduling factor, and frequency domain scaling factor. Some parameters may be predefined by the protocol. For ease of description, the determination of these parameters will not be discussed further in this application's embodiments. The parameter combinations are listed one by one.

[0158] For example, with Taking the determination of frequency domain-related comb tooth degree, frequency division multi-beam scheduling factor and frequency domain scaling factor as an example, you can refer to Formula 11.

[0159] Among them, P F This is the frequency domain scaling factor.

[0160] This application provides a method for determining the length of the first SRS subsequence, so that each SRS subsequence can be determined more accurately in scenarios where there is a frequency domain interval between adjacent frequency bands.

[0161] As can be seen from the above embodiments, the embodiments of this application provide a variety of methods for determining the generation of SRS sub-sequences for different frequency bands, so as to generate appropriate SRS sub-sequences in different scenarios.

[0162] As can be seen from the above one or more embodiments, the embodiments of this application, by designing a multi-sequence splicing SRS sequence scheme, can improve the flexibility of sequence splicing by having each SRS sub-sequence correspond to a frequency band. Furthermore, the PAPR of the sequence can be reduced by controlling the initial phase of the sequence. Using a specific initial phase or a specific initial phase difference can reduce indication overhead. This allows network devices under the frequency division multi-beam (HBF) architecture to perform SRS channel estimation more accurately. It also adapts to various frequency division multi-beam architectures.

[0163] When there is a frequency domain interval between the corresponding frequency bands of the SRS subsequences, a longer SRS sequence length can be guaranteed, thus improving the channel estimation accuracy.

[0164] It is understood that each of the above embodiments of this application can be implemented independently or in combination with each other; there is no absolute subordinate relationship between the embodiments, and they can be combined with each other under any conditions to obtain the corresponding effect.

[0165] It is understood that, in order to implement the functions in the above embodiments, the terminal includes hardware structures and / or software modules corresponding to each function, and the network device includes hardware structures and / or software modules corresponding to each function. Those skilled in the art should readily recognize that, based on the units and method steps of the various examples described in conjunction with the embodiments disclosed in this application, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed by hardware or by computer software driving hardware depends on the specific application scenario and design constraints of the technical solution.

[0166] Figures 13 and 14 are schematic diagrams illustrating possible communication devices provided in embodiments of this application. These communication devices can be used to implement the functions of terminals or network devices in the above method embodiments, and thus also achieve the beneficial effects of the above method embodiments. In embodiments of this application, the communication device can be the terminal 120 shown in Figure 1. The communication device can also be a module (such as a chip) applied to the terminal. The communication device can be the RAN node 110 shown in Figure 1, wherein the RAN node can also be called an access network device or a network device. The communication device can also be a module (such as a chip) applied to the network device.

[0167] In this embodiment, the device for implementing the terminal's functions can be a terminal itself, or a device capable of supporting the terminal in implementing those functions, such as a chip system. This device can be installed in the terminal or used in conjunction with the terminal. Similarly, the device for implementing the network device's functions can be a network device, or a device capable of supporting the network device in implementing those functions, such as a chip system. This device can be installed in the network device or used in conjunction with the network device.

[0168] In this embodiment of the application, the chip system may be composed of chips, or it may include chips and other discrete devices.

[0169] As shown in Figure 13, the communication device 1300 includes a processing unit 1310 and a transceiver unit 1320. The communication device 1300 is used to implement the functions of a terminal or network device in the method embodiment shown in Figure 10 above.

[0170] When the communication device 1300 is used to implement the function of the terminal in the method embodiment shown in FIG10: the processing unit 1310 is used to determine the SRS sequence; the processing unit 1310 is also used to map the first SRS sub-sequence to the frequency band corresponding to the first SRS sub-sequence for the first SRS sub-sequence; the transceiver unit 1320 is used to transmit the SRS.

[0171] When the communication device 1300 is used to implement the function of the network device in the method embodiment shown in FIG10: the transceiver unit 1320 is used to receive SRS; the processing unit 1310 is used to perform channel estimation based on SRS.

[0172] For a more detailed description of the processing unit 1310 and the transceiver unit 1320 described above, please refer to the relevant description of the method embodiment shown in FIG10.

[0173] As shown in Figure 14, the communication device 1400 includes a processor 1410 and an interface circuit 1420. The processor 1410 and the interface circuit 1420 are coupled to each other. It is understood that the interface circuit 1420 can be a transceiver or an input / output interface. Optionally, the communication device 1400 may also include a memory 1430 for storing instructions executed by the processor 1410, or storing input data required by the processor 1410 to execute instructions, or storing data generated after the processor 1410 executes instructions. Sometimes, the interface circuit 1420 can also be understood as part of the processor 1410, in which case the communication device 1400 includes the processor 1410.

[0174] When the communication device 1400 is used to implement the method shown in FIG10, the processor 1410 is used to implement the function of the processing unit 1310, and the interface circuit 1420 is used to implement the function of the transceiver unit 1320.

[0175] When the aforementioned communication device is a chip applied to a terminal, the terminal chip implements the functions of the terminal in the above method embodiments. The terminal chip receives information from the network device, which can be understood as the information being first received by other modules (such as an RF module or antenna) in the terminal, and then sent to the terminal chip by these modules. The terminal chip sends information to the network device, which can be understood as the information being sent down to other modules (such as an RF module or antenna) in the network device, and then sent back to the network device by these modules.

[0176] When the aforementioned communication device is a chip used in a network device, the network device chip implements the functions of the network device in the above method embodiments. The network device chip receives information from the terminal, which can be understood as the information being first received by other modules (such as an RF module or antenna) in the network device, and then sent to the network device chip by these modules. The network device chip sends information to the terminal, which can be understood as the information being sent down to other modules (such as an RF module or antenna) in the terminal, and then sent back to the terminal by these modules.

[0177] In this application, entity A sends information to entity B, either directly or indirectly through other entities. Similarly, entity B receives information from entity A, either directly or indirectly through other entities. Entities A and B can be RAN nodes or terminals, or modules within RAN nodes or terminals. Information transmission and reception can be between RAN nodes and terminals, such as between a base station and a terminal; between two RAN nodes, such as between a CU and a DU; or between different modules within a single device, such as between a terminal chip and other modules of the terminal, or between a base station chip and other modules of the base station.

[0178] It is understood that the processor in the embodiments of this application can be a central processing unit, or other general-purpose processors, digital signal processors, application-specific integrated circuits, field-programmable gate arrays, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. A general-purpose processor can be a microprocessor or any conventional processor.

[0179] The method steps in the embodiments of this application can be implemented in hardware or in software instructions executable by a processor. The software instructions can consist of corresponding software modules, which can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, registers, hard disks, portable hard disks, CD-ROMs, or any other form of storage medium known in the art. An exemplary storage medium is coupled to a processor, enabling the processor to read information from and write information to the storage medium. The storage medium can also be a component of the processor. The processor and storage medium can reside in application-specific integrated circuits (ASICs). Alternatively, the ASIC can reside in a base station or terminal. The processor and storage medium can also exist as discrete components in a base station or terminal.

[0180] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of this application are performed entirely or partially. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user equipment, or other programmable device. The computer program or instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program or instructions can be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium, such as a floppy disk, hard disk, or magnetic tape; it can also be an optical medium, such as a digital video optical disc; or it can be a semiconductor medium, such as a solid-state drive. The computer-readable storage medium may be a volatile or non-volatile storage medium, or may include both types of storage media.

[0181] In the various embodiments of this application, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of different embodiments are consistent and can be referenced by each other. The technical features of different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0182] In this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. In the textual description of this application, the character " / " generally indicates an "or" relationship between the preceding and following related objects; in the formulas of this application, the character " / " indicates a "division" relationship between the preceding and following related objects. "Including at least one of A, B, and C" can mean: including A; including B; including C; including A and B; including A and C; including B and C; including A, B, and C.

[0183] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application. The order of the process numbers described above does not imply the order of execution; the execution order of each process should be determined by its function and internal logic.

[0184] In this application, the base station sends downlink signals or downlink information to the terminal, with the downlink information carried on the downlink channel; the terminal sends uplink signals or uplink information to the base station, with the uplink information carried on the uplink channel. To communicate with the base station, the terminal needs to establish a radio connection on a cell controlled by the base station. The cell with which the terminal has established a radio connection is called the terminal's serving cell. When the terminal communicates with this serving cell, it is also susceptible to interference from signals from neighboring cells.

[0185] The network architecture and business scenarios described in the embodiments of this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided in the embodiments of this application. As those skilled in the art will know, with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0186] The terms "first" and "second," etc., used in the specification and drawings of the embodiments of this application are used to distinguish different objects or to distinguish different processing of the same object. The terms "first" and "second," etc., can distinguish identical or similar items with substantially the same function and effect. For example, "first device" and "second device" are merely to distinguish different devices and do not limit their order. Those skilled in the art will understand that the terms "first" and "second," etc., do not limit the quantity or execution order, and that "first" and "second," etc., do not necessarily imply that they are different.

[0187] Furthermore, the terms "comprising" and "having," and any variations thereof, used in the description of the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include other steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0188] 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 terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner to facilitate understanding.

[0189] It is understood that the term "embodiment" used throughout the specification means that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of the embodiments of this application. Therefore, the various embodiments throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It is understood that in the various embodiments of the embodiments of this application, the sequence number of each process does not imply the order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0190] It is understood that in the embodiments of this application, "...when" and "if" both refer to the corresponding processing that will be carried out under certain objective circumstances, and are not limited to a time, nor do they require a judgment action during implementation, nor do they imply any other limitations.

[0191] It is understood that some optional features in the embodiments of this application can be implemented independently in certain scenarios without relying on other features, such as the current solution on which they are based, to solve the corresponding technical problems and achieve the corresponding effects. Alternatively, they can be combined with other features as needed in certain scenarios. Correspondingly, the apparatus given in the embodiments of this application can also implement these features or functions, which will not be elaborated here.

[0192] In the embodiments of this application, unless otherwise specified, the same or similar parts between the various embodiments can be referred to each other. In the various embodiments of this application, and in the various implementation methods / methods / implementations within each embodiment, unless otherwise specified or logically conflicting, the terminology and / or descriptions between different embodiments and between the various implementation methods / methods / implementations within each embodiment are consistent and can be mutually referenced. The technical features in different embodiments and the various implementation methods / methods / implementations within each embodiment can be combined to form new embodiments, implementation methods, methods, or implementation approaches based on their inherent logical relationships. The following descriptions of the embodiments of this application do not constitute a limitation on the scope of protection of the embodiments of this application.

Claims

1. A communication method characterized by comprising: The method comprises: determining a sounding reference signal (SRS) sequence, wherein the SRS sequence comprises a plurality of SRS subsequences independent of each other, and the plurality of SRS subsequences correspond to a plurality of frequency bands one by one; for a first SRS subsequence, mapping the first SRS subsequence to a frequency band corresponding to the first SRS subsequence, wherein the first SRS subsequence is any one of the plurality of SRS subsequences; sending an SRS, wherein the SRS is obtained based on resource mapping of each SRS subsequence.

2. The method of claim 1, wherein, The first SRS subsequence corresponds to a first frequency band, and the first SRS subsequence is determined based on a cyclic shift parameter corresponding to the first frequency band and an SRS base sequence.

3. The method of claim 2, wherein, The first SRS subsequence is determined based on the cyclic shift parameter corresponding to the first frequency band and the SRS base sequence. The first SRS subsequence is determined based on one or more of the cyclic shift parameter corresponding to the first frequency band, the SRS base sequence, and a parameter for adjusting a phase corresponding to the first frequency band.

4. The method of any one of claims 1-3, wherein: analog weights corresponding to at least two of the plurality of frequency bands are different; or analog weights corresponding to each of the plurality of frequency bands are the same.

5. The method of claim 4, wherein, beams corresponding to each of the plurality of frequency bands are the same, and there is a frequency domain interval between two adjacent frequency bands in the plurality of frequency bands, and the method further comprises: determining a second parameter, the second parameter being used to represent a time-frequency resource position interval between two adjacent SRS subsequences, wherein the time-frequency resource position interval comprises the frequency domain interval; the resource mapping of the SRS subsequence corresponding to each frequency band respectively comprises: for a first SRS subsequence, determining a time-frequency resource position corresponding to the first SRS subsequence based on one or more of the second parameter, an SRS port number, and an SRS power factor; resource mapping the first SRS subsequence according to the time-frequency resource position corresponding to the first SRS subsequence.

6. The method of claim 5, wherein, The second parameter comprises a frequency domain interval and / or a time domain interval, wherein the frequency domain interval is determined based on one or more of a frequency domain related comb degree, a starting frequency domain position, and a mapping bias of the first SRS subsequence, and the time domain interval is determined based on a starting time domain position and / or a time domain bias.

7. The method of claim 6, wherein, The mapping bias of the first SRS subsequence is determined based on one or more of a frequency division granularity, a number of subcarriers within one resource block, a frequency division multi-beam scheduling factor, and a length of the first SRS subsequence.

8. The method according to any one of claims 5-7, characterized in that, The length of the first SRS subsequence is determined based on one or more of a frequency domain related comb degree, a frequency division multi-beam scheduling factor, and a frequency domain scaling factor.

9. A communication method characterized by comprising: The method comprises: receiving a sounding reference signal (SRS), wherein the SRS is obtained by mapping an SRS sequence, the SRS sequence comprising a plurality of SRS subsequences independent of each other, and the plurality of SRS subsequences corresponding to a plurality of frequency bands one by one; performing channel estimation based on the SRS.

10. The method of claim 9, wherein, The first SRS subsequence corresponds to a first frequency band, and the first SRS subsequence is determined based on a cyclic shift parameter corresponding to the first frequency band and an SRS base sequence, wherein the first SRS subsequence is any one of the plurality of SRS subsequences.

11. The method of claim 10, wherein, The first SRS subsequence is determined based on the cyclic shift parameter corresponding to the first frequency band and the SRS base sequence. The first SRS subsequence is determined based on one or more of the cyclic shift parameter corresponding to the first frequency band, the SRS base sequence, and a parameter for adjusting a phase corresponding to the first frequency band.

12. The method of any one of claims 9-11, wherein: The analog weights corresponding to at least two of the plurality of frequency bands are different; or The analog weights corresponding to each of the plurality of frequency bands are the same.

13. The method of claim 12, wherein, The beams corresponding to each of the plurality of frequency bands are the same, there is a frequency domain interval between two adjacent frequency bands in the plurality of frequency bands, and a time-frequency resource position corresponding to a first SRS subsequence is determined based on one or more of a second parameter, a number of SRS ports, and an SRS power factor, wherein the second parameter is used to represent a time-frequency resource position interval between two adjacent SRS subsequences, the time-frequency resource position interval includes the frequency domain interval, and the first SRS subsequence is any one of the plurality of SRS subsequences.

14. The method of claim 13, wherein, The second parameter includes a frequency domain interval and / or a time domain interval, wherein the frequency domain interval is determined based on one or more of a frequency domain related comb degree, a starting frequency domain position, and a mapping bias of the first SRS subsequence, and the time domain interval is determined based on a starting time domain position and / or a time domain bias.

15. The method of claim 14, wherein, The mapping bias of the first SRS subsequence is determined based on one or more of a frequency division granularity, a number of subcarriers within one resource block, a frequency division multi-beam scheduling factor, and a length of the first SRS subsequence.

16. The method according to any one of claims 13-15, characterized in that, The length of the first SRS subsequence is determined based on one or more of a frequency domain related comb degree, a frequency division multi-beam scheduling factor, and a frequency domain scaling factor.

17. A communications device, characterized by A module for performing the method of any one of claims 1-8 or a module for performing the method of any one of claims 9-16.

18. A communications device, characterized by A processor and an interface circuit for receiving signals from other communication devices and transmitting signals to the processor or sending signals from the processor to other communication devices, the processor being used to implement the method of any one of claims 1-8 or the method of any one of claims 9-16 through a logic circuit or executing code instructions.

19. A chip, characterized by A processor and an interface circuit for receiving signals from other communication devices and transmitting signals to the processor or sending signals from the processor to other communication devices, the processor being used to implement the method of any one of claims 1-8 or the method of any one of claims 9-16 through a logic circuit or executing code instructions.

20. A computer-readable storage medium, characterized in that, The computer program or instructions are stored in the computer readable storage medium and, when executed by the communication device, implement the method of any one of claims 1-8 or the method of any one of claims 9-16.

21. A computer program product comprising computer programs or instructions, characterized in that, The computer program or instructions, when executed by the communication device, implement the method of any one of claims 1-8 or the method of any one of claims 9-16.

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