A communication method and apparatus

Abstract

A communication method and apparatus are disclosed. The method includes: a terminal device receiving first information and transmitting a Signal-Responding Message (SRS) based on the first information. The first information indicates the frequency domain resources of the SRS. The frequency domain resources of the SRS include a first frequency domain unit and a second frequency domain unit, wherein the first frequency domain unit and the second frequency domain unit are different. The first frequency domain unit is the frequency domain resource occupied by the SRS in a first frequency hopping subband during a first frequency hopping period, and the second frequency domain unit is the frequency domain resource occupied by the SRS in a second frequency hopping period in the first frequency hopping subband. The first frequency hopping subband is one of multiple frequency hopping subbands. By employing the above method, since the first frequency domain unit and the second frequency domain unit are different, flexible transmission of the SRS can be achieved, and the channel estimation performance across each part of the frequency hopping bandwidth can be guaranteed to be relatively average, thereby improving system performance.

Description

Technical Field

[0001] This application relates to the field of wireless communication, and more particularly to a communication method and apparatus. Background Technology

[0002] In communication systems, the reference signal (RS), also known as the pilot signal, is a known signal provided by the transmitter to the receiver for channel estimation or channel sounding. Reference signals are divided into uplink reference signals and downlink reference signals.

[0003] The uplink reference signal refers to the signal sent from the terminal device to the network device; that is, the sender is the terminal device, and the receiver is the network device. The uplink reference signal serves two purposes: uplink channel estimation (for coherent demodulation and detection in the network device or for calculating precoding) and uplink channel quality measurement. The uplink reference signal can include a demodulation reference signal (DMRS) and a sounding reference signal (SRS). The SRS can be used for uplink channel quality estimation and channel selection, calculating the signal-to-interference-plus-noise ratio (SINR) of the uplink channel, and obtaining uplink channel coefficients. In time-division duplex (TDD) scenarios, where uplink and downlink channels are distinct, the SRS can also be used to obtain downlink channel coefficients.

[0004] like Figure 1 As shown, when the bandwidth to be measured is large, the user equipment (UE) needs to transmit SRS by frequency hopping. The UE transmits SRS on multiple time domain symbols, and the bandwidth occupied by each SRS symbol covers a part of the overall configured bandwidth. For example, the UE can transmit SRS on 4 time domain symbols by frequency hopping, and the bandwidth occupied by each SRS symbol is one-quarter of the overall configured bandwidth.

[0005] However, as system bandwidth increases, the number of resource blocks corresponding to that bandwidth also increases exponentially. Therefore, when the bandwidth occupied by each symbol in the SRS is large, the received power spectral density is relatively low. Specifically, with a fixed transmit power, distributing the transmit power evenly across a larger bandwidth results in a smaller power allocated to each resource element (RE), which may affect the channel estimation results and lead to reduced system performance. When the bandwidth occupied by each symbol in the SRS is small, the number of measurements required to complete one round of system bandwidth measurement and the measurement time will also be longer, thus reducing the efficiency of the system's channel quality measurement.

[0006] In addition, network devices can be configured to allow the UE to transmit SRS on a portion of the bandwidth. For example... Figure 2 As shown, the UE transmits SRS on a fixed portion of the bandwidth within each symbol's bandwidth. This results in a portion of the bandwidth where SRS is never transmitted, and the channel for this portion can only be obtained through interpolation or filtering algorithms. Therefore, the channel estimation for this portion of the bandwidth that is never transmitted may be inaccurate, leading to poor performance in that area. Summary of the Invention

[0007] This application provides a communication method and apparatus to solve the problem that inaccurate channel estimation may occur in the portion of bandwidth that is not being transmitted by SRS, which in turn leads to poor performance of that portion of bandwidth.

[0008] In a first aspect, embodiments of this application provide a communication method, the method comprising:

[0009] The terminal device receives first information and sends the SRS according to the first information. The first information indicates the frequency domain resources of the SRS. The frequency domain resources of the SRS include a first frequency domain unit and a second frequency domain unit. The first frequency domain unit and the second frequency domain unit are different. The first frequency domain unit is the frequency domain resource occupied by the SRS in the first frequency hopping sub-band during the first frequency hopping period. The second frequency domain unit is the frequency domain resource occupied by the SRS in the first frequency hopping sub-band during the second frequency hopping period. The first frequency hopping sub-band is one of a plurality of frequency hopping sub-bands.

[0010] By adopting the above method, compared with the existing technology, the channel estimation of the bandwidth that has not been transmitted by SRS may be inaccurate. Since the first frequency domain unit and the second frequency domain unit are different, SRS can be transmitted flexibly, and the channel estimation performance of each part of the bandwidth can be guaranteed to be relatively average, thereby improving the system performance.

[0011] In one possible design, the first frequency domain unit is smaller than the frequency domain resources occupied by the first frequency hopping subband.

[0012] In one possible design, the first frequency domain unit and the second frequency domain unit are a single RB; or the first frequency domain unit and the second frequency domain unit are multiple consecutive RBs.

[0013] In one possible design, the frequency domain resources of the SRS include a third frequency domain unit, wherein the third frequency domain unit is the frequency domain resource occupied by the SRS on a second frequency hopping sub-band during the first frequency hopping period, and the second frequency hopping sub-band is a frequency hopping sub-band that is different from the first frequency hopping sub-band among the plurality of frequency hopping sub-bands; wherein the frequency domain offset of the starting position of the first frequency domain unit relative to the starting position of the first frequency hopping sub-band is the same as the frequency domain offset of the starting position of the third frequency domain unit relative to the starting position of the second frequency hopping sub-band.

[0014] In one possible design, the frequency domain offset of the starting position of the first frequency domain unit relative to the starting position of the first frequency hopping sub-band differs from the frequency domain offset of the starting position of the second frequency domain unit relative to the starting position of the first frequency hopping sub-band by N frequency domain units. The frequency domain width occupied by the N frequency domain units is less than the bandwidth of the first frequency hopping sub-band, where N is a positive integer.

[0015] Using the above method, the starting frequency domain position of SRS can be changed over time with a granularity of one frequency domain unit.

[0016] In one possible design, the first frequency hopping subband includes frequency domain unit one, frequency domain unit two, frequency domain unit three, and frequency domain unit four in frequency domain order. During four consecutive frequency hopping cycles, the SRS occupies frequency domain resources in the first frequency hopping subband in any of the following ways: the four consecutive frequency hopping cycles occupy frequency domain unit one, frequency domain unit three, frequency domain unit two, and frequency domain unit four in sequence; the four consecutive frequency hopping cycles occupy frequency domain unit two, frequency domain unit four, frequency domain unit one, and frequency domain unit three in sequence; the four consecutive frequency hopping cycles occupy frequency domain unit three, frequency domain unit two, frequency domain unit four, and frequency domain unit one in sequence; the four consecutive frequency hopping cycles occupy frequency domain unit four, frequency domain unit one, frequency domain unit three, and frequency domain unit two in sequence.

[0017] By using the above method, it is possible to ensure that the frequency domain resources occupied by the four SRS transmissions in each frequency hopping subband are distributed relatively evenly in the frequency hopping subband.

[0018] In one possible design, the first frequency hopping subband includes frequency domain unit one, frequency domain unit two, frequency domain unit three, and frequency domain unit four in frequency domain order. During two consecutive frequency hopping cycles, the SRS occupies frequency domain resources in the first frequency hopping subband in any of the following ways: the two consecutive frequency hopping cycles occupy frequency domain unit one and frequency domain unit two, frequency domain unit three and frequency domain unit four in sequence; or the two consecutive frequency hopping cycles occupy frequency domain unit three and frequency domain unit four, frequency domain unit one and frequency domain unit two in sequence.

[0019] By using the above method, it is possible to ensure that the frequency domain resources occupied by the two SRS transmissions in each frequency hopping subband are distributed relatively evenly in the frequency hopping subband.

[0020] In one possible design, the first information indicates the frequency domain resource occupancy method of the SRS.

[0021] In one possible design, transmitting the SRS based on the first information includes: transmitting the SRS in a frequency-hopping manner on the plurality of frequency-hopping subbands.

[0022] Secondly, embodiments of this application provide a communication method, the method comprising:

[0023] The network device sends first information to the terminal device and receives SRS from the terminal device based on the first information. The first information indicates the frequency domain resources of the SRS. The frequency domain resources of the SRS include a first frequency domain unit and a second frequency domain unit. The first frequency domain unit and the second frequency domain unit are different. The first frequency domain unit is the frequency domain resource occupied by the SRS in the first frequency hopping subband during the first frequency hopping period. The second frequency domain unit is the frequency domain resource occupied by the SRS in the first frequency hopping subband during the second frequency hopping period. The first frequency hopping subband is one of a plurality of frequency hopping subbands.

[0024] In one possible design, the first frequency domain unit is smaller than the frequency domain resources occupied by the first frequency hopping subband.

[0025] In one possible design, the first frequency domain unit and the second frequency domain unit are a single RB; or the first frequency domain unit and the second frequency domain unit are multiple consecutive RBs.

[0026] In one possible design, the frequency domain resources of the SRS include a third frequency domain unit, wherein the third frequency domain unit is the frequency domain resource occupied by the SRS on a second frequency hopping sub-band during the first frequency hopping period, and the second frequency hopping sub-band is a frequency hopping sub-band that is different from the first frequency hopping sub-band among the plurality of frequency hopping sub-bands; wherein the frequency domain offset of the starting position of the first frequency domain unit relative to the starting position of the first frequency hopping sub-band is the same as the frequency domain offset of the starting position of the third frequency domain unit relative to the starting position of the second frequency hopping sub-band.

[0027] In one possible design, the frequency domain offset of the starting position of the first frequency domain unit relative to the starting position of the first frequency hopping sub-band differs from the frequency domain offset of the starting position of the second frequency domain unit relative to the starting position of the first frequency hopping sub-band by N frequency domain units. The frequency domain width occupied by the N frequency domain units is less than the bandwidth of the first frequency hopping sub-band, where N is a positive integer.

[0028] In one possible design, the first frequency hopping subband includes frequency domain unit one, frequency domain unit two, frequency domain unit three, and frequency domain unit four in frequency domain order. During four consecutive frequency hopping cycles, the SRS occupies frequency domain resources in the first frequency hopping subband in any of the following ways: the four consecutive frequency hopping cycles occupy frequency domain unit one, frequency domain unit three, frequency domain unit two, and frequency domain unit four in sequence; the four consecutive frequency hopping cycles occupy frequency domain unit two, frequency domain unit four, frequency domain unit one, and frequency domain unit three in sequence; the four consecutive frequency hopping cycles occupy frequency domain unit three, frequency domain unit two, frequency domain unit four, and frequency domain unit one in sequence; the four consecutive frequency hopping cycles occupy frequency domain unit four, frequency domain unit one, frequency domain unit three, and frequency domain unit two in sequence.

[0029] In one possible design, the first frequency hopping subband includes frequency domain unit one, frequency domain unit two, frequency domain unit three, and frequency domain unit four in frequency domain order. During two consecutive frequency hopping cycles, the SRS occupies frequency domain resources in the first frequency hopping subband in any of the following ways: the two consecutive frequency hopping cycles occupy frequency domain unit one and frequency domain unit two, frequency domain unit three and frequency domain unit four in sequence; or the two consecutive frequency hopping cycles occupy frequency domain unit three and frequency domain unit four, frequency domain unit one and frequency domain unit two in sequence.

[0030] In one possible design, the first information indicates the frequency domain resource occupancy method of the SRS.

[0031] Thirdly, embodiments of this application provide a communication device, which includes: a processing unit and a transceiver unit;

[0032] The processing unit invokes the transceiver unit to perform the following: receiving first information and sending SRS according to the first information. The first information indicates the frequency domain resources of the SRS. The frequency domain resources of the SRS include a first frequency domain unit and a second frequency domain unit. The first frequency domain unit and the second frequency domain unit are different. The first frequency domain unit is the frequency domain resource occupied by the SRS in the first frequency hopping sub-band during the first frequency hopping period. The second frequency domain unit is the frequency domain resource occupied by the SRS in the first frequency hopping sub-band during the second frequency hopping period. The first frequency hopping sub-band is one of a plurality of frequency hopping sub-bands.

[0033] In one possible design, the first frequency domain unit is smaller than the frequency domain resources occupied by the first frequency hopping subband.

[0034] In one possible design, the first frequency domain unit and the second frequency domain unit are a single RB; or the first frequency domain unit and the second frequency domain unit are multiple consecutive RBs.

[0035] In one possible design, the frequency domain resources of the SRS include a third frequency domain unit, wherein the third frequency domain unit is the frequency domain resource occupied by the SRS on a second frequency hopping sub-band during the first frequency hopping period, and the second frequency hopping sub-band is a frequency hopping sub-band that is different from the first frequency hopping sub-band among the plurality of frequency hopping sub-bands; wherein the frequency domain offset of the starting position of the first frequency domain unit relative to the starting position of the first frequency hopping sub-band is the same as the frequency domain offset of the starting position of the third frequency domain unit relative to the starting position of the second frequency hopping sub-band.

[0036] In one possible design, the frequency domain offset of the starting position of the first frequency domain unit relative to the starting position of the first frequency hopping sub-band differs from the frequency domain offset of the starting position of the second frequency domain unit relative to the starting position of the first frequency hopping sub-band by N frequency domain units. The frequency domain width occupied by the N frequency domain units is less than the bandwidth of the first frequency hopping sub-band, where N is a positive integer.

[0037] In one possible design, the first frequency hopping subband includes frequency domain unit one, frequency domain unit two, frequency domain unit three, and frequency domain unit four in frequency domain order. During four consecutive frequency hopping cycles, the SRS occupies frequency domain resources in the first frequency hopping subband in any of the following ways: the four consecutive frequency hopping cycles occupy frequency domain unit one, frequency domain unit three, frequency domain unit two, and frequency domain unit four in sequence; the four consecutive frequency hopping cycles occupy frequency domain unit two, frequency domain unit four, frequency domain unit one, and frequency domain unit three in sequence; the four consecutive frequency hopping cycles occupy frequency domain unit three, frequency domain unit two, frequency domain unit four, and frequency domain unit one in sequence; the four consecutive frequency hopping cycles occupy frequency domain unit four, frequency domain unit one, frequency domain unit three, and frequency domain unit two in sequence.

[0038] In one possible design, the first frequency hopping subband includes frequency domain unit one, frequency domain unit two, frequency domain unit three, and frequency domain unit four in frequency domain order.

[0039] In two consecutive frequency hopping cycles, the frequency domain resources of the SRS in the first frequency hopping subband are occupied in any of the following ways: the two consecutive frequency hopping cycles occupy frequency domain unit one and frequency domain unit two, frequency domain unit three and frequency domain unit four in sequence; the two consecutive frequency hopping cycles occupy frequency domain unit three and frequency domain unit four, frequency domain unit one and frequency domain unit two in sequence.

[0040] In one possible design, the first information indicates the frequency domain resource occupancy method of the SRS.

[0041] In one possible design, the processing unit invokes the transceiver unit to perform: transmitting the SRS in a frequency-hopping manner on the plurality of frequency-hopping subbands.

[0042] Fourthly, embodiments of this application provide a communication device, which includes: a processing unit and a transceiver unit;

[0043] The processing unit invokes the transceiver unit to perform the following: sending first information to the terminal device, the first information indicating the frequency domain resources of the SRS, the frequency domain resources of the SRS including a first frequency domain unit and a second frequency domain unit, wherein the first frequency domain unit and the second frequency domain unit are different, the first frequency domain unit is the frequency domain resource occupied by the SRS in the first frequency hopping sub-band during the first frequency hopping period, and the second frequency domain unit is the frequency domain resource occupied by the SRS in the first frequency hopping sub-band during the second frequency hopping period, the first frequency hopping sub-band being one of multiple frequency hopping sub-bands; and receiving the SRS from the terminal device according to the first information.

[0044] In one possible design, the first frequency domain unit is smaller than the frequency domain resources occupied by the first frequency hopping subband.

[0045] In one possible design, the first frequency domain unit and the second frequency domain unit are a single resource block (RB); or the first frequency domain unit and the second frequency domain unit are multiple consecutive RBs.

[0046] In one possible design, the frequency domain resources of the SRS include a third frequency domain unit, wherein the third frequency domain unit is the frequency domain resource occupied by the SRS on a second frequency hopping sub-band during the first frequency hopping period, and the second frequency hopping sub-band is a frequency hopping sub-band that is different from the first frequency hopping sub-band among the plurality of frequency hopping sub-bands; wherein the frequency domain offset of the starting position of the first frequency domain unit relative to the starting position of the first frequency hopping sub-band is the same as the frequency domain offset of the starting position of the third frequency domain unit relative to the starting position of the second frequency hopping sub-band.

[0047] In one possible design, the frequency domain offset of the starting position of the first frequency domain unit relative to the starting position of the first frequency hopping sub-band differs from the frequency domain offset of the starting position of the second frequency domain unit relative to the starting position of the first frequency hopping sub-band by N frequency domain units. The frequency domain width occupied by the N frequency domain units is less than the bandwidth of the first frequency hopping sub-band, where N is a positive integer.

[0048] In one possible design, the first frequency hopping subband includes frequency domain unit one, frequency domain unit two, frequency domain unit three, and frequency domain unit four in frequency domain order. During four consecutive frequency hopping cycles, the SRS occupies frequency domain resources in the first frequency hopping subband in any of the following ways: the four consecutive frequency hopping cycles occupy frequency domain unit one, frequency domain unit three, frequency domain unit two, and frequency domain unit four in sequence; the four consecutive frequency hopping cycles occupy frequency domain unit two, frequency domain unit four, frequency domain unit one, and frequency domain unit three in sequence; the four consecutive frequency hopping cycles occupy frequency domain unit three, frequency domain unit two, frequency domain unit four, and frequency domain unit one in sequence; the four consecutive frequency hopping cycles occupy frequency domain unit four, frequency domain unit one, frequency domain unit three, and frequency domain unit two in sequence.

[0049] In one possible design, the first frequency hopping subband includes frequency domain unit one, frequency domain unit two, frequency domain unit three, and frequency domain unit four in frequency domain order. During two consecutive frequency hopping cycles, the SRS occupies frequency domain resources in the first frequency hopping subband in any of the following ways: the two consecutive frequency hopping cycles occupy frequency domain unit one and frequency domain unit two, frequency domain unit three and frequency domain unit four in sequence; or the two consecutive frequency hopping cycles occupy frequency domain unit three and frequency domain unit four, frequency domain unit one and frequency domain unit two in sequence.

[0050] In one possible design, the first information indicates the frequency domain resource occupancy method of the SRS.

[0051] Fifthly, embodiments of this application provide a communication device, the device including a module for executing any possible design in the first aspect, or a module for executing any possible design in the second aspect.

[0052] A sixth aspect provides a communication device including a processor. The processor is coupled to a memory and can be used to execute instructions in the memory to implement any possible design of the first aspect or any possible design of the second aspect. Optionally, the communication device further includes a communication interface, to which the processor is coupled, the communication interface being used to input and / or output information, the information including at least one of instructions and data. Optionally, the communication device further includes a memory.

[0053] In one implementation, the communication device is a terminal device or a network device. When the communication device is a terminal device or a network device, the communication interface can be a transceiver or an input / output interface. Optionally, the transceiver can be a transceiver circuit. Optionally, the input / output interface can be an input / output circuit.

[0054] In another implementation, the communication device is a chip or chip system configured in a terminal device or network device. When the communication device is a chip or chip system configured in a terminal device, the communication interface can be an input / output interface, interface circuit, output circuit, input circuit, pins, or related circuits, etc. The processor can also be manifested as a processing circuit or logic circuit.

[0055] In a seventh aspect, embodiments of this application provide a communication device, including a processor and an interface circuit. The interface circuit is used to input and / or output information, the information including at least one of instructions and data. The interface circuit is capable of receiving signals from other communication devices outside the communication device and transmitting them to the processor, or sending signals from the processor to other communication devices outside the communication device. The processor is used to implement any possible design in the first aspect or any possible design in the second aspect through logic circuits or execution code instructions.

[0056] In a sixth aspect, embodiments of this application provide a computer-readable storage medium storing a computer program or instructions that, when executed by a communication device, implement any possible design in the first aspect or any possible design in the second aspect.

[0057] In a seventh aspect, embodiments of this application provide a computer program product containing a program that, when run on a communication device, causes the communication device to perform any of the possible designs in the first aspect or any of the possible designs in the second aspect. Attached Figure Description

[0058] Figure 1 One of the schematic diagrams of a terminal device transmitting SRS in a frequency-hopping manner according to an embodiment of this application;

[0059] Figure 2 A second schematic diagram illustrating the terminal device transmitting SRS in a frequency-hopping manner according to an embodiment of this application;

[0060] Figure 3(a) is a schematic diagram of the communication system 100 provided in an embodiment of this application;

[0061] Figure 3(b) is a schematic diagram of the communication system 200 provided in an embodiment of this application;

[0062] Figure 4 This is a schematic diagram of the network elements involved in the embodiments of this application;

[0063] Figure 5 This is a schematic diagram of SRS frequency hopping mapping in an embodiment of this application;

[0064] Figure 6 This is a flowchart summarizing the communication method in the embodiments of this application;

[0065] Figure 7 This is one of the schematic diagrams illustrating the frequency domain resource occupancy method of SRS in the embodiments of this application;

[0066] Figure 8 This is the second schematic diagram of the frequency domain resource occupancy method of SRS in the embodiments of this application;

[0067] Figure 9 This is the third schematic diagram of the frequency domain resource occupancy method of SRS in the embodiments of this application;

[0068] Figure 10 This is the fourth schematic diagram of the frequency domain resource occupancy method of SRS in the embodiments of this application;

[0069] Figure 11 This is the fifth schematic diagram of the frequency domain resource occupancy method of SRS in the embodiments of this application;

[0070] Figure 12 This is the sixth schematic diagram of the frequency domain resource occupancy method of SRS in the embodiments of this application;

[0071] Figure 13 This is one of the structural schematic diagrams of the communication device provided in the embodiments of this application;

[0072] Figure 14 This is a second schematic diagram of the communication device provided in the embodiments of this application. Detailed Implementation

[0073] The embodiments of this application will now be described in further detail with reference to the accompanying drawings.

[0074] The technical solutions of this application can be applied to various communication systems, such as: Global System for Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) system, future 5th generation (5G) mobile communication system, or new radio (NR), etc. The 5G mobile communication system described in this application includes non-standalone (NSA) 5G mobile communication systems and / or standalone (SA) 5G mobile communication systems. The technical solutions provided in this application can also be applied to future communication systems, such as sixth-generation mobile communication systems. Communication systems can also be public land mobile network (PLMN) networks, device-to-device (D2D) networks, machine-to-machine (M2M) networks, Internet of Things (IoT) networks, or other networks.

[0075] Figure 3(a) is a schematic diagram of a possible communication system 100 used in an embodiment of this application. The communication system 100 is in a single-carrier scenario or a carrier aggregation (CA) scenario. The communication system 100 includes a network device 110 and a terminal device 120, and the network device 110 and the terminal device 120 communicate through a wireless network.

[0076] It should be understood that network device 110 in Figure 3(a) may include one or more cells. When the transmission direction of communication system 100 is uplink transmission, terminal device 120 is the transmitter and network device 110 is the receiver. When the transmission direction of communication system 100 is downlink transmission, network device 110 is the transmitter and terminal device 120 is the receiver.

[0077] Figure 3(b) is a schematic diagram of another possible communication system 200 applied in the embodiments of this application. This communication system 200 operates in a dual connectivity (DC) or coordinated multipoint transmission / reception (CoMP) scenario. The communication system 200 includes network device 210, network device 220, and terminal device 230. Network device 210 is the network device used when terminal device 230 initially accesses the system and is responsible for radio resource control (RRC) communication with terminal device 230. Network device 220 is added during RRC reconfiguration to provide additional radio resources. Terminal device 230, configured with CA, is connected to network device 210 and network device 220. The link between network device 210 and terminal device 230 can be referred to as the first link, and the link between network device 220 and terminal device 230 can be referred to as the second link.

[0078] The communication systems shown in Figures 3(a) and 3(b) above are merely illustrative examples. The communication systems applicable to the embodiments of this application are not limited to these. For example, the number of network devices and terminal devices included in the communication system can be other numbers, or a single base station, multi-carrier aggregation scenario, dual-link scenario, D2D communication scenario, or CoMP scenario can be adopted. Among them, CoMP can be one or more of non-coherent joint transmission (NCJT), coherent joint transmission (CJT), and joint transmission (JT).

[0079] like Figure 4The network elements involved in the embodiments of this application shown include terminal devices and network devices.

[0080] The terminal device in this application embodiment can refer to user equipment, access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device. The terminal device can also be a cellular phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA), handheld device with wireless communication capabilities, computing device or other processing device connected to a wireless modem, vehicle-mounted device, wearable device, terminal device in future 5G networks, or terminal device in future evolved PLMNs, etc., and this application embodiment does not limit this to these categories.

[0081] By way of example and not limitation, in this embodiment, the terminal device can also be a wearable device. Wearable devices, also known as wearable smart devices, are a general term for devices that utilize wearable technology to intelligently design and develop everyday wearables, such as glasses, gloves, watches, clothing, and shoes. Wearable devices are portable devices that are worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not merely hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include those that are feature-rich, large in size, and can achieve complete or partial functions without relying on a smartphone, such as smartwatches or smart glasses, as well as those that focus on a specific type of application function and require the use of other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0082] Furthermore, in this embodiment, the terminal device can also be a terminal device in an IoT system. IoT is an important component of future information technology development, and its main technical feature is connecting objects to networks through communication technologies, thereby realizing an intelligent network of human-machine interconnection and object-to-object interconnection. In this embodiment, IoT technology can achieve massive connectivity, deep coverage, and low terminal power consumption through technologies such as narrowband (NB).

[0083] In addition, in this embodiment, the terminal device may also include sensors such as smart printers, train detectors, and gas stations. Its main functions include collecting data (for some terminal devices), receiving control information and downlink data from network devices, and sending electromagnetic waves to transmit uplink data to network devices.

[0084] The network device in this application embodiment can be a device for communicating with terminal devices. The network device can be a base station (BTS) in a global system for mobile communications (GSM) or code division multiple access (CDMA) system, a base station (NodeB, NB) in a wideband code division multiple access (WCDMA) system, an evolved base station (eNB or eNodeB) in an LTE system, a radio controller in a cloud radio access network (CRAN) scenario, or a relay station, access point, vehicle-mounted device, wearable device, or a network device in a future 5G network or a network device in a future evolved PLMN network, etc. The embodiments of this application are not limited.

[0085] The network device in this application embodiment can be a device in a wireless network, such as a radio access network (RAN) node that connects a terminal to the wireless network. Examples of RAN nodes include: base stations, next-generation base stations (gNBs), transmission reception points (TRPs), evolved Node Bs (eNBs), home base stations, baseband units (BBUs), or access points (APs) in a WiFi system. In a network architecture, the network device may include a centralized unit (CU) node, a distributed unit (DU) node, or a RAN device comprising both CU and DU nodes.

[0086] In this embodiment, the terminal device or network device includes a hardware layer, an operating system layer running on top of the hardware layer, and an application layer running on top of the operating system layer. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also called main memory). The operating system can be any one or more computer operating systems that implement business processing through processes, such as Linux, Unix, Android, iOS, or Windows. The application layer includes applications such as browsers, address books, word processing software, and instant messaging software. Furthermore, this embodiment does not specifically limit the specific structure of the execution entity of the method provided in this embodiment, as long as it can communicate according to the method provided in this embodiment by running a program that records the code of the method provided in this embodiment. For example, the execution entity of the method provided in this embodiment can be a terminal device or a network device, or a functional module in the terminal device or network device that can call and execute a program.

[0087] Furthermore, various aspects or features of this application can be implemented as methods, apparatus, or articles of manufacture using standard programming and / or engineering techniques. The term "article of manufacture" as used herein encompasses a computer program accessible from any computer-readable device, carrier, or medium. For example, computer-readable media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks, or magnetic tapes), optical discs (e.g., compact discs (CDs), digital versatile discs (DVDs), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (EPROMs), cards, sticks, or key drives, etc.). Additionally, the various storage media described herein may represent one or more devices and / or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data.

[0088] The following explanations of some terms used in this application are provided to facilitate understanding by those skilled in the art.

[0089] 1. Physical downlink control channel (PDCCH)

[0090] To improve the efficiency of blind detection of control channels by terminal devices, the concept of control resource sets was proposed during the NR standard development process. Network devices can configure one or more resource sets for terminal devices to transmit PDCCH. Network devices can transmit control channels to terminal devices on any control resource set corresponding to the terminal device. In addition, network devices also need to notify the terminal device of other associated configurations of the control resource set, such as search spacesets. The configuration information of each control resource set differs, for example, in frequency domain bandwidth and time domain length. Extendably, the control resource set in this application can be a control resource set (CORESET), a control region, or an enhanced-physical downlink control channel (ePDCCH) set defined by a 5G mobile communication system.

[0091] The time-frequency position occupied by the PDCCH can be referred to as the downlink control region.

[0092] In NR, the downlink control area can be flexibly configured by RRC signaling through control resource sets and search space sets:

[0093] The control resource set can be configured with information such as the frequency domain position of the PDCCH or control channel element (CCE) and the number of continuous symbols in the time domain; the search space set can be configured with information such as the detection period and offset of the PDCCH and the starting symbol in a time slot.

[0094] For example, if the search space set can be configured with a PDCCH period of 1 time slot and a time domain start symbol of symbol 0, then the terminal device can detect the PDCCH at the beginning of each time slot.

[0095] The PDCCH is used to transmit downlink control information (DCI). Different DCI contents use different radio network temporary identifiers (RNTIs) for cyclic redundancy check (CRC) scrambling. Terminal devices can determine the function of the current PDCCH by blindly checking the RNTI.

[0096] 2. Antenna port

[0097] An antenna port, also simply called a port, is a transmitting antenna that is recognized by the receiving device, or a spatially distinguishable transmitting antenna. Each virtual antenna can be configured with one antenna port, and each virtual antenna can be a weighted combination of multiple physical antennas. Each antenna port can correspond to a reference signal port.

[0098] 3. Bandwidth Part (BWP)

[0099] Network devices can configure one or more downlink / uplink bandwidth regions for terminal devices. Each bandwidth region (BWP) can consist of contiguous physical resource blocks (PRBs) in the frequency domain, and is a subset of the terminal device's bandwidth. The smallest granularity of the BWP in the frequency domain is one PRB. The system can configure one or more bandwidth regions for terminal devices, and these bandwidth regions may overlap in the frequency domain.

[0100] In a single-carrier scenario, a terminal device can have only one active BWP at any given time. The terminal device can only receive or transmit data / reference signals on the active BWP.

[0101] In this application, when applicable to BWP scenarios, a specific BWP can also be a set of bandwidths at a specific frequency, or a set of multiple resource blocks (RBs).

[0102] 4. Component carrier (CC)

[0103] A unit carrier can also be called a component carrier, constituent carrier, or member carrier, etc. Each carrier in multi-carrier aggregation can be called a "CC". Terminal equipment can receive data on multiple CCs. Each carrier consists of one or more PRBs, and each carrier can have its own corresponding PDCCH, scheduling its own CC's physical downlink shared channel (PDSCH); or, some carriers do not have a PDCCH, in which case cross-carrier scheduling can be performed.

[0104] Cross-carrier scheduling: A network device transmits a PDCCH on one CC to schedule data transmission on another CC. That is, it transmits a PDSCH on the other CC, or a physical uplink shared channel (PUSCH) on the other CC. More specifically, a network device can transmit a PDCCH on a BWP (Browser-Wide Platform) of one CC to schedule the transmission of PDSCH or PUSCH on the BWP of another CC. In other words, the control channel is transmitted on one CC, while the corresponding data channel is transmitted on another CC.

[0105] It should also be understood that in the embodiments of this application, "carrier" can be understood as "serving cell" or "cell".

[0106] Optionally, the cell includes at least one of a downlink carrier, an uplink (UL) carrier, and a supplementary uplink (SUL) carrier. Specifically, the cell may include a downlink carrier and an uplink carrier; or the cell may include a downlink carrier and a supplementary uplink carrier; or the cell may include a downlink carrier, an uplink carrier, and a supplementary uplink carrier.

[0107] Optionally, the uplink supplementary carrier has a lower carrier frequency than the uplink carrier in order to improve uplink coverage.

[0108] Optionally, in general, in an FDD system, the uplink carrier and the downlink carrier have different carrier frequencies; in a TDD system, the uplink carrier and the downlink carrier have the same carrier frequency.

[0109] It should also be understood that, in the embodiments of this application, uplink resources are on the uplink carrier; downlink resources are on the downlink carrier.

[0110] It should also be understood that in the embodiments of this application, the uplink carrier can be a normal uplink carrier or a supplementary uplink (SUL) carrier.

[0111] 5. Time units, uplink time units, downlink time units, and flexible time units

[0112] A time unit is, for example, but not limited to, one or more radio frames, or one or more subframes, or one or more time slots, or one or more mini slots, or one or more subslots, or one or more symbols, or a time window consisting of multiple frames or subframes, such as a system information (SI) window. The duration of a symbol is not limited. The length of a symbol may vary for different subcarrier intervals.

[0113] Time-domain resources are, for example, but not limited to, one or more orthogonal frequency division multiplexing (OFDM) symbols. For example, the time-domain resources occupied by a reference signal (RS) can be indicated by the start symbol (or start position) and the number of symbols configured in the network device.

[0114] The symbols include uplink symbols and downlink symbols. Uplink symbols can be called single-carrier-frequency division multiple access (SC-FDMA) symbols or OFDM symbols; downlink symbols can be OFDM symbols.

[0115] The communication system divides each time unit in the time domain into at least one of uplink time units, downlink time units, or flexible time units based on the uplink-downlink time unit ratio.

[0116] The uplink time unit refers to the time domain resources included for uplink transmission. The downlink time unit refers to the time domain resources included for downlink transmission.

[0117] A flexible time unit is a time unit that includes flexible transmission time domain resources. A flexible time unit can be indicated by RRC signaling as either uplink or downlink time domain resources; or, it can be dynamically indicated as either uplink or downlink time domain resources according to service requirements. For example, it can be indicated by DCI signaling as either uplink or downlink time domain resources. It is understood that the flexible transmission time domain resources in a flexible time unit can also serve as a guard interval, thereby utilizing reserved guard intervals to avoid interference caused by uplink / downlink transmission transitions. It is understood that in various embodiments of this application, a flexible transmission symbol can also be referred to as a flexible symbol. It is also understood that in various embodiments of this application, "flexible transmission time domain resources" can be replaced with "flexible symbol." For example, a flexible time unit is a time slot, and a flexible transmission time domain resource is a symbol.

[0118] 6. SRS

[0119] SRS can be used for uplink channel quality estimation and channel selection, calculating the SINR of the uplink channel, and obtaining uplink channel coefficients. In TDD scenarios, where uplink and downlink channels are distinct, SRS can also be used to obtain downlink channel coefficients. Network devices can use the uplink / downlink channel coefficients estimated by SRS to determine the uplink / downlink precoding matrices, thereby improving uplink / downlink transmission rates and increasing system capacity.

[0120] Network devices configure the time-frequency resource location occupied by SRS resources and the transmission method used to transmit SRS on those SRS resources via higher-layer signaling such as RRC signaling or Medium Access Control-Control Element (MAC-CE) signaling. The configuration information for each SRS resource (e.g., higher-layer parameter SRS resource) includes at least the index number of the SRS resource, the time-frequency location information occupied by the SRS resource, and the SRS transmission port number, which can be determined by the configuration parameters shown in Table 1. The minimum probe bandwidth for SRS resources supported by NR is 4 PRBs, and the frequency hopping bandwidths of different SRS resources are integer multiples of each other, with the frequency hopping pattern having a tree structure.

[0121] Table 1 SRS Resource Configuration Parameters

[0122]

[0123] SRS resource configuration can be time-domain typed as periodic, semi-static, or aperiodic. The configuration information for periodic SRS resources includes the period (e.g., 2ms, 5ms, 10ms, etc.) and offset parameters. After the network device configures the SRS resource via RRC signaling, the terminal device will send SRS on the determined SRS resource within a specific periodic slot according to the configuration information. The configuration information for aperiodic SRS resources does not include the period and offset parameters, but only a time-domain offset parameter K relative to the DCI signaling that triggers the SRS. When the terminal device receives DCI signaling at time n and the signaling indicates that the SRS is triggered, it will send SRS on the corresponding SRS resource at time n+K, where K and n are positive integers.

[0124] SRS can support frequency hopping transmission, and the specific frequency hopping characteristics can be determined by parameters in both the time domain and the frequency domain.

[0125] The process of determining the time domain location of the SRS is as follows:

[0126] For example, in the time domain, SRS occupies N slots within a time slot. S(nrofSymbols) symbols (e.g., 1, 2, 4), with repetition factor (repetitionFactor, R) ∈ {1, 2, 4}, and satisfying R ≤ N S That is, repeating each symbol R times.

[0127] According to the repetitionFactor:

[0128] When R = N S At that time, SRS transmission in frequency hopping mode within a time slot is not supported;

[0129] When R = 1, N S When the frequency hopping frequency is 2 or 4, SRS can be transmitted in a frequency hopping manner within a time slot, specifically with a frequency hopping unit of one OFDM symbol.

[0130] When R = 2, N S When the value is 4, SRS can be transmitted in a frequency-hopping manner within a time slot, specifically in units of a pair of OFDM symbols (i.e., 2 OFDM symbols).

[0131] For periodic SRS and semi-static SRS, corresponding period and time-domain offset parameters need to be configured. Periodic SRS and semi-static SRS can be transmitted in frequency hopping mode within a time slot or in frequency hopping mode between time slots (i.e., according to the SRS period). Aperiodic SRS frequency hopping can only be performed within a time slot (i.e., all hopping is completed after one trigger).

[0132] The process for determining the SRS frequency domain location is as follows:

[0133] For example, network devices configure SRS resources for terminal devices via RRC signaling. The RRC signaling indicates the number of ports included in the SRS resource, its frequency and time domain locations, the period used, comb teeth, cyclic shift value, sequence ID, and other information. The frequency domain location of the SRS resource is determined by a set of frequency domain parameters in the RRC signaling (in existing 3GPP protocols, these parameters include n...). RRC ,n shift B SRS C SRS b hop Terminal devices can determine the bandwidth and starting position of the frequency domain occupied by SRS through these frequency domain parameters and the rules predetermined by the protocol.

[0134] Among them, C SRS Index number B configured for cell-specific SRS bandwidth. SRS Configure an index number for the user's specific SRS bandwidth, b hop Indicates whether to perform SRS frequency hopping (or indicates the frequency hopping bandwidth), n shiftThe offset value that indicates the starting frequency of the uplink system bandwidth available for SRS transmission (or the starting frequency domain position of the SRS frequency hopping bandwidth), n RRC Indicates the frequency domain starting position index of the user's SRS (or the frequency domain position of the starting frequency hopping subband of the SRS).

[0135] Wherein, the starting position of the SRS frequency domain: the terminal device is configured with n according to the network device. RRC ,n shift Determine the starting position of the frequency domain of the SRS.

[0136] SRS configured bandwidth (or frequency hopping bandwidth): The terminal device is configured with parameters b by the network device according to the parameters b configured for the terminal device. hop and C SRS And Table 3 determines the number of RBs (m) that constitute the overall SRS. SRS,b′ , where b′=b hop For example, suppose b hop =0, C SRS =9, by looking up Table 3, we can determine m SRS,b′ =32.

[0137] Bandwidth occupied by each symbol of SRS (or bandwidth occupied by a frequency hopping subband): The terminal device uses parameter B configured by the network device for the terminal device. SRS and C SRS And Table 3 determines the number of RBs m that SRS occupies on each symbol. SRS,b Where b = B SRS For example, suppose B SRS =2, C SRS =9, by looking up Table 3, we can determine m SRS,b =8.

[0138] When b hop ≥B SRS At this time, the terminal device does not enable frequency hopping. That is, the terminal device transmits SRS in a non-frequency hopping manner. It should be understood that when using the non-frequency hopping method, the SRS transmitted by the terminal in one transmission covers the entire configured bandwidth of the SRS resource.

[0139] When b hop SRS When this occurs, the terminal device enables frequency hopping. That is, the terminal device transmits SRS in a frequency hopping manner. It should be understood that when transmitting SRS in a frequency hopping manner, each SRS transmitted by the terminal device only covers a portion of the configured bandwidth of the SRS resource (i.e., one frequency hopping subband). The terminal transmits SRS multiple times within one frequency hopping cycle to cover the entire configured bandwidth of the SRS resource.

[0140] The current standard specifies the following method for transmitting SRS:​

[0141] (1) If b hop ≥B SRS (No frequency hopping), frequency position index n b The value is fixed (constant):

[0142]

[0143] (2) If b hop <B SRS (Frequency hopping) in,

[0144]

[0145] n SRS The number of SRS transmissions specific to the terminal device (the terminal device's transmit count).

[0146]

[0147] Table 2

[0148]

[0149] It is important to note that, with Figure 1 Let's take an example to illustrate this. Figure 1 In the frequency domain, a square represents 4 RBs. Therefore, the configured bandwidth of SRS resources includes 48 RBs. The number of RBs occupied by SRS on a time domain symbol is 12. Therefore, the terminal device can send SRS on 4 time domain symbols by frequency hopping. The bandwidth of each time domain symbol is one-quarter of the overall configured bandwidth. Figure 1 In the diagram, the small black squares represent the four Resource Blocks (RBs) that carry the SRS. It should be noted that... Figure 1 The four time-domain symbols can be four consecutive time-domain symbols or four non-consecutive time-domain symbols. This application does not limit this. Figure 1 The frequency hopping methods shown are only for illustrating how the SRS occupies frequency domain resources and do not limit how the SRS occupies time domain resources.

[0150] In this embodiment, the number of frequency hopping cycles in one frequency hopping cycle is equal to the number of times the terminal device needs to send SRS within one frequency hopping cycle. For example, Figure 1 The number of frequency hopping cycles is 4.

[0151] Optionally, the number of frequency hopping is equal to Where, N b According to C SRS This is determined using Table 3.

[0152] For example, suppose b hop =0, CSRS =9, B SRS If the frequency hopping count is 2, then the number of frequency hopping counts is 2 × 2 = 4.

[0153] Table 3

[0154]

[0155]

[0156]

[0157] For example:

[0158] Assuming a system bandwidth of 20MHz:

[0159] (1) The SRS bandwidth of the cell is configured as C SRS =18, User SRS bandwidth configuration selection B SRS =3, and the number of RBs allocated to each layer is m respectively. SRS,b =72,24,12,4(b=0,1,2,3).

[0160] (2) User SRS selects full-band frequency hopping (b hop =0).

[0161] (3) The start bit of the UE is configured as n RRC =15 (0~17), this user occupies an even number of subcarriers, i.e., k TC =0(2comb)

[0162] (k TC This indicates the subcarrier offset, specifically the subcarrier offset occupied by the user's SRS, used to determine which comb tooth to use.

[0163] (1-1) The number of branches N of the parent node at level b b =1,3,2,3(b=0,1,2,3).

[0164] (1-2) The values ​​are 1, 3, and 6 (N0, N0N1, N0N1N2), denoted as P0, P1, and P2 respectively.

[0165] (1-3) Let the initial UE transmission count be n. SRS =0:

[0166] (2-1) When b = 0, N b =1,m SRS,b =72, b≤b hop =0, then frequency position index

[0167] (2-2) When b = 1, Nb =3,m SRS,b =24, b>b hop ,but

[0168] Note:

[0169] (2-3) When b = 2, N b =2,m SRS,b =12, b>b hop ,but

[0170] Note:

[0171] (2-4) When b = 3, N b =3,m SRS,b =4, b>b hop ,but

[0172] Note:

[0173] As can be seen from the above calculations, when the UE transmit count is n SRS When = 0, it corresponds to the frequency position on each layer.

[0174] The indices are n b =0, 2, 1, 0, then as n SRS With the increase in frequency, the user's SRS frequency hopping process is shown in Table 4:

[0175] Table 4: Reference Table for SRS Frequency Hopping Calculation Process

[0176]

[0177] Referring to the table above, the frequency hopping mapping of this user's SRS in the frequency domain is as follows: Figure 5 As shown.

[0178] from Figure 5 As can be seen, the SRS frequency band resources for a specified user are obtained through... This single frequency hopping can cover the entire SRS bandwidth of the cell. Furthermore, it should be noted that the above frequency hopping method is merely an example and is not intended to limit the scope of this application.

[0179] The main advantage of using wideband (non-frequency hopping) SRS transmission is that the entire frequency band can be reported to the network device using only one SRS transmission. Since only symbols {1, 2, 4} of the last 6 symbols of the subframe are used to transmit SRS (whether wideband SRS or narrowband SRS (frequency hopping)), these symbols cannot be used for uplink data transmission to all terminal devices within the cell. Therefore, from a resource utilization perspective, wideband SRS transmission is more efficient, requiring fewer symbols to probe the entire bandwidth. Narrowband SRS, on the other hand, requires 4 time-domain symbols to report the entire frequency band to the network device. Figure 1 As shown.

[0180] However, with high uplink path loss, wideband SRS transmission may result in a relatively low received power spectral density, potentially affecting channel estimation results. Specifically, with a fixed transmit power, distributing power evenly across a larger bandwidth results in less power allocated to each transmit array (RE). In this case, using multiple narrowband SRSs can concentrate available transmit power within a narrower frequency range and perform frequency hopping across the entire band, improving gain.

[0181] Furthermore, in narrowband SRS transmission, when the bandwidth occupied by each SRS symbol is large, the received power spectral density is relatively low, which may affect the channel estimation results. When the bandwidth occupied by each SRS symbol is small, the number of measurements and measurement time required to complete one round of system bandwidth measurement will also be longer, thus reducing the efficiency of the system's channel quality measurement. When the terminal device transmits SRS on a fixed portion of the bandwidth of each symbol, the bandwidth for which no SRS is transmitted may experience inaccurate channel estimation, leading to poor performance in that portion of the bandwidth. Figure 2 As shown. It should be noted that, Figure 2 The terminal device shown transmits SRS in a frequency-hopping manner on a fixed portion of the bandwidth of each symbol, wherein, Figure 2 The frequency hopping method shown is only to illustrate how the SRS occupies frequency domain resources. The time domain resources occupied by the SRS can be continuous time domain symbols or non-continuous time domain symbols.

[0182] Based on this, embodiments of this application provide a communication method to address the problem that inaccurate channel estimation may occur in the portion of bandwidth where SRS transmission is not ongoing, leading to poor performance in that portion of bandwidth. This method achieves a balance between uplink coverage and efficient system channel quality measurement. Figure 6 As shown, the method includes:

[0183] Step 601: The network device sends first information to the terminal device. The first information indicates the frequency domain resources of the SRS. The frequency domain resources of the SRS include a first frequency domain unit and a second frequency domain unit. The first frequency domain unit and the second frequency domain unit are different. The first frequency domain unit is the frequency domain resource occupied by the SRS in the first frequency hopping sub-band during the first frequency hopping period. The second frequency domain unit is the frequency domain resource occupied by the SRS in the first frequency hopping sub-band during the second frequency hopping period. The first frequency hopping sub-band is one of multiple frequency hopping sub-bands.

[0184] For example, the first information can be carried via RRC, MAC CE, or DCI.

[0185] It should be noted that, in this embodiment, the configured bandwidth of SRS includes one or more frequency-hopping subbands. For example, the configured bandwidth of SRS includes L frequency-hopping subbands, where L is a positive integer. Exemplarily, the terminal device can configure the terminal device according to the parameter b configured by the network device. hop and C SRS And Table 3 determines the number of RBs (m) that constitute the overall SRS. SRS,b′ That is, the configuration bandwidth (or frequency hopping bandwidth) of SRS, where b′=b hop The terminal device can use the parameter B configured by the network device for the terminal device. SRS and C SRS And Table 3 determines the number of RBs m that SRS occupies on each symbol. SRS,b That is, frequency hopping subband, where b = B SRS .

[0186] Each frequency-hopping subband has the same bandwidth (i.e., each frequency-hopping subband occupies the same number of RBs). For example, any two frequency-hopping subbands do not overlap; that is, no two frequency-hopping subbands have the same RBs. The first frequency-hopping subband is any one of one or more frequency-hopping subbands, and the second frequency-hopping subband is also any one of one or more frequency-hopping subbands. The first frequency-hopping subband and the second frequency-hopping subband are different.

[0187] The frequency hopping period, also known as the scan period, refers to the time required to complete a scan of the entire SRS configuration bandwidth. It should be understood that if the SRS time-frequency resource is a periodic or semi-periodic reference signal resource, multiple SRS cycles are required to complete a scan of the entire SRS configuration bandwidth.

[0188] For example, the configured bandwidth of SRS includes M frequency-hopping subbands, where M is a positive integer. The terminal device transmits SRS on M symbols using frequency hopping, wherein the terminal device transmits SRS on the i-th symbol and the corresponding frequency-hopping subband according to the frequency hopping formula. In this case, the frequency hopping period is M symbols.

[0189] The first frequency hopping period and the second frequency hopping period can be two consecutive frequency hopping periods, or the first frequency hopping period and the second frequency hopping period can be discontinuous frequency hopping periods.

[0190] It is understood that the first information can also simultaneously indicate the time-domain resources of the SRS, but this application embodiment does not limit this.

[0191] The difference between the first frequency domain unit and the second frequency domain unit can mean that the first frequency domain unit and the second frequency domain unit are completely different or partially different.

[0192] The first and second frequency domain units are illustrated below with examples.

[0193] In some embodiments, the first frequency domain cell is smaller than the frequency domain resources occupied by the first frequency-hopping sub-band, and the second frequency domain cell is smaller than the frequency domain resources occupied by the first frequency-hopping sub-band. Alternatively, the first frequency domain cell is smaller than the frequency domain resources occupied by the first frequency-hopping sub-band, and the second frequency domain cell is equal to the frequency domain resources occupied by the first frequency-hopping sub-band. Still another possibility is that the first frequency domain cell is equal to the frequency domain resources occupied by the first frequency-hopping sub-band, and the second frequency domain cell is smaller than the frequency domain resources occupied by the first frequency-hopping sub-band.

[0194] In some embodiments, the first frequency domain unit includes one or more RBs, and the second frequency domain unit includes one or more RBs. Exemplarily, the first frequency domain unit includes multiple consecutive RBs, and the second frequency domain unit includes multiple consecutive RBs, as in Example 1 below. Alternatively, the first frequency domain unit includes multiple consecutive RBs, and the second frequency domain unit includes multiple RBs, but the multiple RBs included in the second frequency domain unit are not consecutive, as in Example 2 below. Alternatively, the first frequency domain unit includes multiple RBs, but the multiple RBs included in the first frequency domain unit are not consecutive, and the second frequency domain unit includes multiple consecutive RBs, as in Example 3 below. Alternatively, the first frequency domain unit includes multiple RBs, but the multiple RBs included in the first frequency domain unit are not consecutive, and the second frequency domain unit includes multiple RBs, but the multiple RBs included in the second frequency domain unit are not consecutive, as in Example 4 below.

[0195] In some embodiments, the number of RBs included in the first frequency domain unit is the same as the number of RBs included in the second frequency domain unit, such as in Example 7 below, or the number of RBs included in the first frequency domain unit is different from the number of RBs included in the second frequency domain unit, such as in Example 6 below.

[0196] In some embodiments, the first frequency domain unit and the second frequency domain unit do not overlap, that is, the first frequency domain unit and the second frequency domain unit do not have the same RB. Alternatively, the first frequency domain unit and the second frequency domain unit have overlapping frequency domain resources, that is, the first frequency domain unit and the second frequency domain unit have the same RB, such as in Example 7 below.

[0197] For example, the first frequency-hopping subband includes four consecutive RBs. In frequency domain order, these four consecutive RBs are RB1, RB2, RB3, and RB4. Here, "in frequency domain order" means either ascending or descending by RB number. The RBs included in the first and second frequency domain units can include, but are not limited to, the following examples:

[0198] Example 1: The first frequency domain unit includes RB1 and RB2, and the second frequency domain unit includes RB3 and RB4.

[0199] Example 2: The first frequency domain unit includes RB1 and RB2, and the second frequency domain unit includes RB1 and RB3.

[0200] Example 3: The first frequency domain unit includes RB2 and RB4, and the second frequency domain unit includes RB3 and RB4.

[0201] Example 4: The first frequency domain unit includes RB2 and RB4, and the second frequency domain unit includes RB1 and RB3.

[0202] Example 5: The first frequency domain unit includes RB1, and the second frequency domain unit includes RB2.

[0203] Example 6: The first frequency domain unit includes RB1, and the second frequency domain unit includes RB2 and RB3.

[0204] Example 7: The first frequency domain unit includes RB1 and RB2, and the second frequency domain unit includes RB2 and RB3.

[0205] It is understood that the above examples are merely illustrations and are not intended to limit the embodiments of this application.

[0206] Furthermore, in some embodiments, the frequency domain resources of the SRS also include a third frequency domain unit, wherein the third frequency domain unit is the frequency domain resource occupied by the SRS on the second frequency hopping sub-band during the first frequency hopping period, and the second frequency hopping sub-band is a frequency hopping sub-band that is different from the first frequency hopping sub-band among a plurality of frequency hopping sub-bands. The frequency domain offset of the starting position of the first frequency domain unit relative to the starting position of the first frequency hopping sub-band is the same as the frequency domain offset of the starting position of the third frequency domain unit relative to the starting position of the second frequency hopping sub-band.

[0207] For example, if the starting position of the first frequency domain unit is RB0 and the starting position of the first frequency hopping sub-band is RB0, then the frequency domain offset of the starting position of the first frequency domain unit relative to the starting position of the first frequency hopping sub-band is 0 RBs. That is, the RB where the starting position of the first frequency domain unit is located is the same as the RB where the starting position of the first frequency hopping sub-band is located, and the sequence number of the RB where the starting position of the first frequency domain unit is located differs from the sequence number of the RB where the starting position of the first frequency hopping sub-band is located by 0.

[0208] For example, if the starting position of the first frequency domain unit is RB1 and the starting position of the first frequency hopping sub-band is RB0, then the frequency domain offset of the starting position of the first frequency domain unit relative to the starting position of the first frequency hopping sub-band is 1 RB. That is, the RB where the starting position of the first frequency domain unit is located is 0 RB away from the RB where the starting position of the first frequency hopping sub-band is located, or the index of the RB where the starting position of the first frequency domain unit is located differs from the index of the RB where the starting position of the first frequency hopping sub-band is located by 1.

[0209] For example, if the starting position of the first frequency domain unit is RB2 and the starting position of the first frequency hopping sub-band is RB0, then the frequency domain offset of the starting position of the first frequency domain unit relative to the starting position of the first frequency hopping sub-band is 2 RBs. That is, the RB where the starting position of the first frequency domain unit is located is 1 RB away from the RB where the starting position of the first frequency hopping sub-band is located, or the index of the RB where the starting position of the first frequency domain unit is located differs from the index of the RB where the starting position of the first frequency hopping sub-band is located by 2.

[0210] For example, the configuration bandwidth of the SRS includes L frequency hopping sub-bands, where L is a positive integer greater than or equal to 2. In the first frequency hopping period, the frequency domain offset of the starting position of the frequency domain resources occupied by the SRS in the i-th frequency hopping sub-band relative to the starting position of the i-th frequency hopping sub-band is the same as the frequency domain offset of the starting position of the frequency domain resources occupied by the SRS in the j-th frequency hopping sub-band relative to the starting position of the j-th frequency hopping sub-band, where i ≠ j, and i and j are both positive integers.

[0211] For example, the first frequency-hopping subband includes four consecutive RBs. In frequency domain order, the four consecutive RBs are RB1, RB2, RB3, and RB4. The second frequency-hopping subband includes four consecutive RBs. In frequency domain order, the four consecutive RBs are RB1', RB2', RB3', and RB4'. The first and second frequency-hopping subbands can be adjacent or non-adjacent. The first and second frequency-hopping subbands do not have overlapping frequency domain resources. The RBs included in the first and third frequency domain units can include, but are not limited to, the following examples:

[0212] Example 1: The first frequency domain unit includes RB1 and RB2, and the third frequency domain unit includes RB1' and RB2'.

[0213] Example 2: The first frequency domain unit includes RB3, and the second frequency domain unit includes RB3'.

[0214] It is understood that the above examples are merely illustrations and are not intended to limit the embodiments of this application.

[0215] In some embodiments, the frequency domain offset of the starting position of the first frequency domain unit relative to the starting position of the first frequency hopping sub-band differs from the frequency domain offset of the starting position of the second frequency domain unit relative to the starting position of the first frequency hopping sub-band by N frequency domain units. The frequency domain width occupied by N frequency domain units is less than the bandwidth of the first frequency hopping sub-band, and N is a positive integer. For example, each frequency domain unit may include one RB or multiple consecutive RBs.

[0216] For example, the first frequency-hopping subband includes four consecutive RBs. In frequency domain order, the four consecutive RBs are RB1, RB2, RB3, and RB4. The RBs included in the first and second frequency domain units can include, but are not limited to, the following examples:

[0217] Example 1: Each frequency domain unit may include one RB. The frequency domain offset of the starting position of the first frequency domain unit relative to the starting position of the first frequency hopping sub-band differs from the frequency domain offset of the starting position of the second frequency domain unit relative to the starting position of the first frequency hopping sub-band by one frequency domain unit. For example, if the first frequency domain unit includes RB1 and the second frequency domain unit includes RB2, then the frequency domain unit containing the first frequency domain unit is 0 frequency domain units away from the frequency domain unit containing the second frequency domain unit, or the index of the frequency domain unit containing the first frequency domain unit differs from the index of the frequency domain unit containing the second frequency domain unit by one.

[0218] Each frequency domain unit may include two RBs. The frequency domain offset of the starting position of the first frequency domain unit relative to the starting position of the first frequency hopping sub-band differs from the frequency domain offset of the starting position of the second frequency domain unit relative to the starting position of the first frequency hopping sub-band by one frequency domain unit. For example, if the first frequency domain unit includes RB1 and the second frequency domain unit includes RB3, then the frequency domain unit containing the first frequency domain unit is separated from the frequency domain unit containing the second frequency domain unit by one frequency domain unit, or the index of the frequency domain unit containing the first frequency domain unit differs from the index of the frequency domain unit containing the second frequency domain unit by 2.

[0219] Example 2: Each frequency domain unit may include 2 RBs. The frequency domain offset of the starting position of the first frequency domain unit relative to the starting position of the first frequency hopping sub-band differs from the frequency domain offset of the starting position of the second frequency domain unit relative to the starting position of the first frequency hopping sub-band by 1 frequency domain unit. For example, if the first frequency domain unit includes RB1 and the second frequency domain unit includes RB3, then the frequency domain unit containing the first frequency domain unit is 0 frequency domain units away from the frequency domain unit containing the second frequency domain unit, or the index of the frequency domain unit containing the first frequency domain unit differs from the index of the frequency domain unit containing the second frequency domain unit by 1.

[0220] It is understood that the above examples are merely illustrations and are not intended to limit the embodiments of this application.

[0221] Furthermore, for W consecutive frequency hopping cycles, the frequency domain resources occupied by the SRS in the first frequency hopping sub-band cover the first frequency hopping sub-band, where W is a positive integer greater than or equal to 2.

[0222] In some embodiments, the first frequency hopping period and the second frequency hopping period can be any two frequency hopping periods out of W consecutive frequency hopping periods.

[0223] In some embodiments, W is equal to the number of RBs included in the first frequency hopping subband divided by the number of RBs included in the frequency domain resources occupied by an SRS transmission in the first frequency hopping subband. Specifically, the number of RBs included in the frequency domain resources occupied by the SRS in the first frequency hopping subband is the same in different frequency hopping cycles.

[0224] For example, in W consecutive frequency hopping cycles, the frequency domain resources occupied by the SRS in the first frequency hopping subband do not overlap. Alternatively, in W consecutive frequency hopping cycles, at least two frequency domain resources occupied by the SRS in the first frequency hopping subband overlap.

[0225] For example, the first frequency-hopping subband includes four consecutive RBs. In frequency domain order, the four consecutive RBs are RB1, RB2, RB3, and RB4. In four consecutive frequency-hopping cycles, the SRS occupies the following frequency domain resources in the first frequency-hopping subband: RB1, RB2, RB3, and RB4, respectively. Alternatively, in two consecutive frequency-hopping cycles, the SRS occupies the following frequency domain resources in the first frequency-hopping subband: RB1 and RB2, RB3 and RB4, respectively. Or, in three consecutive frequency-hopping cycles, the SRS occupies the following frequency domain resources in the first frequency-hopping subband: RB1 and RB2, RB3, RB3 and RB4, respectively.

[0226] In some embodiments, the first frequency hopping subband includes frequency domain unit one, frequency domain unit two, frequency domain unit three, and frequency domain unit four in frequency domain order.

[0227] During four consecutive frequency hopping cycles, the frequency domain resource occupancy mode of the SRS in the first frequency hopping subband is any one of the following:

[0228] Method 1: Four consecutive frequency hopping cycles sequentially occupy frequency domain units one, three, two, and four. It can be understood that the frequency domain resource allocation method of the SRS in frequency hopping subbands other than the first frequency hopping subband can be similar to the frequency domain resource allocation method of the SRS in the first frequency hopping subband. For example, in four consecutive frequency hopping cycles, the frequency domain resource allocation method of the SRS can be as follows: Figure 7 As shown, hereinafter referred to as such Figure 7 The frequency hopping method shown is the first frequency hopping method.

[0229] Method 2: Four consecutive frequency hopping cycles sequentially occupy frequency domain unit 2, frequency domain unit 4, frequency domain unit 1, and frequency domain unit 3. It can be understood that the frequency domain resource allocation method of the SRS in frequency hopping subbands other than the first frequency hopping subband can be similar to the frequency domain resource allocation method of the SRS in the first frequency hopping subband. For example, in four consecutive frequency hopping cycles, the frequency domain resource allocation method of the SRS can be as follows: Figure 8 As shown, hereinafter referred to as such Figure 8 The frequency hopping method shown is the second frequency hopping method.

[0230] Method 3: Four consecutive frequency hopping cycles sequentially occupy frequency domain unit three, frequency domain unit two, frequency domain unit four, and frequency domain unit one. It can be understood that the frequency domain resource allocation method of the SRS in frequency hopping subbands other than the first frequency hopping subband can be similar to the frequency domain resource allocation method of the SRS in the first frequency hopping subband. For example, in four consecutive frequency hopping cycles, the frequency domain resource allocation method of the SRS can be as follows: Figure 9 As shown, hereinafter referred to as such Figure 9 The frequency hopping method shown is the third frequency hopping method.

[0231] Method 4: Four consecutive frequency hopping cycles sequentially occupy frequency domain unit four, frequency domain unit one, frequency domain unit three, and frequency domain unit two. It can be understood that the frequency domain resource allocation method of the SRS in frequency hopping subbands other than the first frequency hopping subband can be similar to the frequency domain resource allocation method of the SRS in the first frequency hopping subband. For example, in four consecutive frequency hopping cycles, the frequency domain resource allocation method of the SRS can be as follows: Figure 10 As shown, hereinafter referred to as such Figure 10 The frequency hopping method shown is the fourth frequency hopping method.

[0232] During two consecutive frequency hopping cycles, the frequency domain resource occupancy mode of the SRS in the first frequency hopping subband is any one of the following:

[0233] Method 5: Two consecutive frequency hopping cycles sequentially occupy frequency domain units one and two, and frequency domain units three and four. It can be understood that the frequency domain resource allocation method of the SRS in frequency hopping subbands other than the first frequency hopping subband can be similar to the frequency domain resource allocation method of the SRS in the first frequency hopping subband. For example, in two consecutive frequency hopping cycles, the frequency domain resource allocation method of the SRS can be as follows: Figure 11 As shown, hereinafter referred to as such Figure 11 The frequency hopping method shown is the fifth frequency hopping method.

[0234] Method 6: Two consecutive frequency hopping cycles sequentially occupy frequency domain units three and four, and frequency domain units one and two. It can be understood that the frequency domain resource allocation method of the SRS in frequency hopping subbands other than the first frequency hopping subband can be similar to the frequency domain resource allocation method of the SRS in the first frequency hopping subband. For example, in two consecutive frequency hopping cycles, the frequency domain resource allocation method of the SRS can be as follows: Figure 12 As shown, hereinafter referred to as such Figure 12 The frequency hopping method shown is the sixth frequency hopping method.

[0235] Regarding methods 1 to 6 described above, it should be noted that the embodiments of this application do not exclude the possibility that the SRS may occupy frequency domain resources differently in different frequency hopping subbands. Furthermore, besides methods 1 to 6, there are many other possible ways for the SRS to occupy frequency domain resources in the first frequency hopping subband, which are not limited in the embodiments of this application. For example, four consecutive frequency hopping cycles may occupy frequency domain unit one, frequency domain unit two, frequency domain unit three, and frequency domain unit four in sequence.

[0236] also, Figures 7 to 12 This application is only intended to illustrate the frequency domain resource allocation method of SRS; the time domain resource allocation method of SRS is not limited in this embodiment. Specifically, SRS can be transmitted on consecutive time domain symbols or on non-consecutive time domain symbols.

[0237] Furthermore, the first information can also indicate the frequency domain resource occupancy method of the SRS. For example, the first information can also indicate that the frequency domain resource occupancy method of the SRS is any one of the first, second, third, fourth, fifth, or sixth frequency hopping methods. Alternatively, the first information can also indicate that the frequency domain resource occupancy method of the SRS is any one of the first, second, third, or fourth frequency hopping methods. Alternatively, the first information can also indicate that the frequency domain resource occupancy method of the SRS is any one of the fifth or sixth frequency hopping methods. For example, the first information includes a first field, which includes 3 bits, used to indicate the frequency domain resource occupancy method of the SRS. Wherein, a first field of 000 indicates that the frequency domain resource occupancy method of the SRS is the first frequency hopping method. A first field of 001 indicates that the frequency domain resource occupancy method of the SRS is the second frequency hopping method. A first field of 010 indicates that the frequency domain resource occupancy method of the SRS is the third frequency hopping method. A first field of 011 indicates that the frequency domain resource occupancy method of the SRS is the fourth frequency hopping method. A first field value of 100 indicates that the SRS uses the fifth frequency hopping mode for its frequency domain resources. A first field value of 101 indicates that the SRS uses the sixth frequency hopping mode for its frequency domain resources.

[0238] In some embodiments, the first frequency hopping subband includes four frequency domain units in frequency domain order. The first frequency hopping subband includes frequency domain unit one, frequency domain unit two, frequency domain unit three, and frequency domain unit four in frequency domain order.

[0239] The offset of the SRS frequency domain resource in the first frequency hopping sub-band refers to the number of frequency domain cells by which the starting position of the SRS frequency domain resource in the first frequency hopping sub-band is offset relative to the starting position of the first frequency hopping sub-band.

[0240] In the four consecutive frequency hopping cycles, the offset of the SRS frequency domain resource in the first frequency hopping subband is any one of the following:

[0241] The four consecutive frequency hopping cycles are 0, 2, 1, and 3, respectively. For example, if the SRS occupies one frequency domain unit in the first frequency hopping sub-band, then the offset of the SRS's frequency domain resources in the first frequency hopping sub-band is 0, meaning the SRS occupies frequency domain unit one. An offset of 2 means the SRS occupies frequency domain unit three. An offset of 1 means the SRS occupies frequency domain unit two. An offset of 3 means the SRS occupies frequency domain unit four. It can be understood that the offsets of the SRS's frequency domain resources in other frequency hopping sub-bands besides the first frequency hopping sub-band can be similar to the offsets of the SRS's frequency domain resources in the first frequency hopping sub-band. For example, the offset of the SRS frequency domain resources during four consecutive frequency hopping cycles can be as follows: Figure 7 As shown, hereinafter referred to as such Figure 7 The offset of the frequency domain resources of the SRS shown is the first offset set.

[0242] Alternatively, the four consecutive frequency hopping cycles can be 1, 3, 0, and 2, respectively. For example, if the SRS occupies a single frequency domain cell in the first frequency hopping sub-band, then an offset of 1 for the SRS's frequency domain resources in the first frequency hopping sub-band indicates that the SRS occupies frequency domain cell two. An offset of 3 for the SRS's frequency domain resources in the first frequency hopping sub-band indicates that the SRS occupies frequency domain cell four. An offset of 0 for the SRS's frequency domain resources in the first frequency hopping sub-band indicates that the SRS occupies frequency domain cell one. An offset of 2 for the SRS's frequency domain resources in the first frequency hopping sub-band indicates that the SRS occupies frequency domain cell three. It is understood that the offsets of the SRS's frequency domain resources in other frequency hopping sub-bands besides the first frequency hopping sub-band can be similar to the offsets of the SRS's frequency domain resources in the first frequency hopping sub-band. For example, the offset of the SRS frequency domain resources during four consecutive frequency hopping cycles can be as follows: Figure 8 As shown, hereinafter referred to as such Figure 8 The offset of the frequency domain resources of the SRS shown is the second offset set.

[0243] Alternatively, the offsets of the SRS corresponding to the four consecutive frequency hopping cycles are 2, 1, 3, and 0, respectively. For example, if the SRS occupies one frequency domain unit in the first frequency hopping subband, then an offset of 2 in the SRS's frequency domain resources in the first frequency hopping subband means that the SRS occupies frequency domain unit three in the first frequency hopping subband. An offset of 1 in the SRS's frequency domain resources in the first frequency hopping subband means that the SRS occupies frequency domain unit two in the first frequency hopping subband. An offset of 3 in the SRS's frequency domain resources in the first frequency hopping subband means that the SRS occupies frequency domain unit four in the first frequency hopping subband. An offset of 0 in the SRS's frequency domain resources in the first frequency hopping subband means that the SRS occupies frequency domain unit one in the first frequency hopping subband. It is understandable that the offset of the SRS frequency domain resources in frequency hopping subbands other than the first frequency hopping subband can be similar to the offset of the SRS frequency domain resources in the first frequency hopping subband. For example, in four consecutive frequency hopping cycles, the offset of the SRS frequency domain resources can be as follows: Figure 9 As shown, hereinafter referred to as such Figure 9 The offset of the frequency domain resources of the SRS shown is the third offset set.

[0244] Alternatively, the offsets of the SRS corresponding to the four consecutive frequency hopping cycles are 3, 0, 2, and 1, respectively. For example, if the SRS occupies one frequency domain unit in the first frequency hopping subband, then an offset of 3 in the SRS's frequency domain resources in the first frequency hopping subband means that the SRS occupies frequency domain unit four in the first frequency hopping subband. An offset of 0 in the SRS's frequency domain resources in the first frequency hopping subband means that the SRS occupies frequency domain unit one in the first frequency hopping subband. An offset of 3 in the SRS's frequency domain resources in the first frequency hopping subband means that the SRS occupies frequency domain unit three in the first frequency hopping subband. An offset of 1 in the SRS's frequency domain resources in the first frequency hopping subband means that the SRS occupies frequency domain unit two in the first frequency hopping subband. It is understandable that the offset of the SRS frequency domain resources in frequency hopping subbands other than the first frequency hopping subband can be similar to the offset of the SRS frequency domain resources in the first frequency hopping subband. For example, in four consecutive frequency hopping cycles, the offset of the SRS frequency domain resources can be as follows: Figure 10 As shown, hereinafter referred to as such Figure 10 The offset of the frequency domain resources of the SRS shown is the fourth offset set.

[0245] During two consecutive frequency hopping cycles, the offset of the SRS frequency domain resources in the first frequency hopping subband is any one of the following:

[0246] The offsets of the SRS corresponding to two consecutive frequency hopping cycles are 0 and 2, respectively. For example, if the SRS occupies two frequency domain units in the first frequency hopping subband, then an offset of 0 in the SRS's frequency domain resources in the first frequency hopping subband means that the SRS occupies frequency domain units one and two in the first frequency hopping subband. An offset of 2 in the SRS's frequency domain resources in the first frequency hopping subband means that the SRS occupies frequency domain units three and four in the first frequency hopping subband. It can be understood that the offsets of the SRS's frequency domain resources in other frequency hopping subbands besides the first frequency hopping subband can be similar to the offsets of the SRS's frequency domain resources in the first frequency hopping subband. For example, in two consecutive frequency hopping cycles, the offsets of the SRS's frequency domain resources can be as follows: Figure 10 As shown, hereinafter referred to as such Figure 10 The offset of the frequency domain resources of the SRS shown is the fifth offset set.

[0247] Alternatively, the offsets of the SRS corresponding to two consecutive frequency hopping cycles are 2 and 0, respectively. For example, if the SRS occupies two frequency domain units in the first frequency hopping subband, then an offset of 2 in the SRS's frequency domain resources in the first frequency hopping subband means that the SRS occupies frequency domain units three and four in the first frequency hopping subband. An offset of 0 in the SRS's frequency domain resources in the first frequency hopping subband means that the SRS occupies frequency domain units one and two in the first frequency hopping subband. It can be understood that the offsets of the SRS's frequency domain resources in other frequency hopping subbands besides the first frequency hopping subband can be similar to the offsets of the SRS's frequency domain resources in the first frequency hopping subband. For example, in two consecutive frequency hopping cycles, the offsets of the SRS's frequency domain resources can be as follows: Figure 11 As shown, hereinafter referred to as such Figure 11 The offset of the frequency domain resources of the SRS shown is the sixth offset set.

[0248] Regarding the aforementioned first to sixth offset sets, it should be noted that the embodiments of this application do not exclude the possibility that the frequency domain resources of the SRS will have different offsets in different frequency hopping subbands. Furthermore, besides the aforementioned first to sixth offset sets, there are many other possible offsets of the SRS's frequency domain resources in the first frequency hopping subband, which are not limited in the embodiments of this application. For example, the offsets of the SRS corresponding to four consecutive frequency hopping cycles are 0, 1, 2, and 3, respectively.

[0249] Furthermore, the first information may also indicate the offset of the frequency domain resource of the SRS. For example, the first information may also indicate that the offset of the frequency domain resource of the SRS is any one of a first offset set, a second offset set, a third offset set, a fourth offset set, a fifth offset set, or a sixth offset set. Alternatively, the first information may also indicate that the offset of the frequency domain resource of the SRS is any one of a first offset set, a second offset set, a third offset set, or a fourth offset set. Alternatively, the first information may also indicate that the offset of the frequency domain resource of the SRS is any one of a fifth offset set or a sixth offset set. For example, the first information includes a first field, which includes 3 bits, used to indicate the offset of the frequency domain resource of the SRS. Wherein, a first field of 000 indicates that the offset of the frequency domain resource of the SRS is the first offset set. A first field of 001 indicates that the offset of the frequency domain resource of the SRS is the second offset set. A first field of 010 indicates that the offset of the frequency domain resource of the SRS is the third offset set. The first field being 011 indicates that the offset of the SRS frequency domain resource belongs to the fourth offset set. The first field being 100 indicates that the offset of the SRS frequency domain resource belongs to the fifth offset set. The first field being 101 indicates that the offset of the SSRS frequency domain resource belongs to the sixth offset set.

[0250] Step 602: The terminal device receives the first information from the network device and sends SRS based on the first information.

[0251] For example, the terminal device transmits SRS in a frequency-hopping manner on multiple frequency-hopping subbands.

[0252] For example, the configuration bandwidth of SRS includes L frequency hopping subbands. The terminal device transmits SRS on L transmission opportunities and corresponding frequency hopping subbands within a frequency hopping cycle, where L is a positive integer.

[0253] The embodiments of this application are described below with reference to specific examples.

[0254] Assuming the minimum transmission granularity (Partial SRS, PSG) includes one or more RBs, and SRS_BW_MAX is the maximum transmission bandwidth (i.e., frequency hopping subband) of a single SRS transmission, K = SRS_BW_MAX / PSG. If K equals 4, there are 6 possible SRS transmission patterns (i.e., frequency hopping modes). Network devices can indicate the SRS transmission pattern using 3 bits, where T is one frequency hopping cycle.

[0255] Diagram 1: Each frequency hopping subband is divided into four parts, and the four resources are labeled 1, 2, 3, 4 respectively (e.g., PSG#1, PSG#2, PSG#3, PSG#4). Each SRS is transmitted on one of the PSG resources. The PSG identifier is the same for each SRS transmission within each frequency hopping cycle. In different frequency hopping cycles, each SRS transmission is sent in the order of resources PSG#1, PSG#3, PSG#2, PSG#4, as follows. Figure 7 As shown;

[0256] Diagram 2: Each frequency hopping subband is divided into four parts, and the four resources are labeled 1, 2, 3, 4 respectively (e.g., PSG#1, PSG#2, PSG#3, PSG#4). Each SRS is transmitted on one of the PSG resources. The PSG identifier is the same for each SRS transmission within each frequency hopping cycle. In different frequency hopping cycles, each SRS transmission is sent in the order of resources PSG#2, PSG#4, PSG#1, PSG#3, as shown below. Figure 8 As shown;

[0257] Figure 3: Each frequency hopping subband is divided into four parts, and the four resources are labeled 1, 2, 3, 4 respectively (e.g., PSG#1, PSG#2, PSG#3, PSG#4). Each SRS is transmitted on one of the PSG resources. The PSG identifier is the same for each SRS transmission within each frequency hopping cycle. In different frequency hopping cycles, each SRS transmission is sent in the order of resources PSG#3, PSG#2, PSG#4, PSG#1, as shown below. Figure 9 As shown;

[0258] Diagram 4: Each frequency hopping subband is divided into four parts, and the four resources are labeled 1, 2, 3, 4 respectively (e.g., PSG#1, PSG#2, PSG#3, PSG#4). Each SRS is transmitted on one of the PSG resources. The PSG identifier is the same for each SRS transmission within each frequency hopping cycle. In different frequency hopping cycles, each SRS transmission is sent in the order of resources PSG#4, PSG#1, PSG#3, PSG#2, as shown below. Figure 10 As shown;

[0259] Figure 5: Each frequency hopping subband is divided into four parts, and the four resources are labeled 1, 2, 3, 4 respectively (e.g., PSG#1, PSG#2, PSG#3, PSG#4). Each SRS is transmitted on two consecutive PSG resources. The PSG identifiers are the same for each SRS transmission within each frequency hopping cycle. In different frequency hopping cycles, each SRS transmission is sent in the order of resources PSG#1+PSG#2, PSG#3+PSG#4, as shown below. Figure 11 As shown;

[0260] Figure 6: Each frequency hopping subband is divided into four parts, and the four resources are labeled 1, 2, 3, 4 respectively (e.g., PSG#1, PSG#2, PSG#3, PSG#4). Each SRS is transmitted on two consecutive PSG resources. The PSG identifiers are the same for each SRS transmission within each frequency hopping cycle. In different frequency hopping cycles, each SRS transmission is sent in the order of resources PSG#3+PSG#4, PSG#1+PSG#2, as follows. Figure 12 As shown.

[0261] Furthermore, network devices can configure different SRS transmission patterns (i.e., frequency hopping methods) for different terminal devices to achieve multi-user multiplexing. The following example illustrates how to configure a portion of the bandwidth SRS transmission pattern for multiplexing between different users:

[0262] Example 1: Pattern 1, Pattern 2, Pattern 3, and Pattern 4 can be configured to 4 users respectively, achieving reuse for 4 users; or, any two of these four patterns can be assigned to 2 users respectively, achieving reuse for 2 users; or, any three of these four patterns can be assigned to 3 users respectively, achieving reuse for 3 users.

[0263] Example 2: Patterns 3, 4, and 5 can be assigned to 3 users respectively to achieve reuse by 3 users; or patterns 3 and 5 can be assigned to 2 users respectively to achieve reuse by 2 users; or patterns 4 and 5 can be assigned to 2 users respectively to achieve reuse by 2 users.

[0264] Example 3: Sample 3, Sample 4, and Sample 5 can be configured to 3 users respectively to achieve reuse by 3 users; or Sample 3 and Sample 5 can be assigned to 2 users respectively to achieve reuse by 2 users; or Sample 4 and Sample 5 can be assigned to 2 users respectively to achieve reuse by 2 users.

[0265] Example 4: Pattern 1, Pattern 2, and Pattern 6 can be assigned to 3 users respectively to achieve reuse by 3 users; or Pattern 1 and Pattern 6 can be assigned to 2 users respectively to achieve reuse by 2 users; or Pattern 2 and Pattern 6 can be assigned to 2 users respectively to achieve reuse by 2 users.

[0266] Example 5: Pattern 5 and Pattern 6 can be configured for 2 users respectively, enabling reuse by 2 users.

[0267] By adopting the partial bandwidth SRS transmission method provided in the embodiments of this application, the channel estimation performance on each frequency hopping subband can be guaranteed to be relatively average, thereby improving system performance.

[0268] It is understood that, in order to achieve the functions in the above embodiments, the network device and terminal device include hardware structures and / or software modules corresponding to perform 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 in hardware or by computer software driving hardware depends on the specific application scenario and design constraints of the technical solution.

[0269] Figure 13 and Figure 14 The diagram illustrates the possible structures of communication devices provided in the embodiments of this application. These communication devices can be used to implement the functions of terminal devices or network devices in the above method embodiments, and thus can also achieve the beneficial effects of the above method embodiments. In the embodiments of this application, the communication device can be a terminal device, a network device, or a module (such as a chip) applied to a terminal device or a network device.

[0270] like Figure 13 As shown, the communication device 1300 includes a processing unit 1310 and a transceiver unit 1320. The communication device 1300 is used to implement the above-mentioned... Figure 6 The methods illustrated in this embodiment demonstrate the functions of the terminal device or network device.

[0271] When the communication device 1300 is used to implement Figure 6 In the method embodiment shown, the terminal device functions as follows: Processing unit 1310 calls transceiver unit 1320 to execute:

[0272] Receive first information, which indicates the frequency domain resources of the detection reference signal (SRS). The frequency domain resources of the SRS include a first frequency domain unit and a second frequency domain unit. The first frequency domain unit and the second frequency domain unit are different. The first frequency domain unit is the frequency domain resource occupied by the SRS in the first frequency hopping sub-band during the first frequency hopping period, and the second frequency domain unit is the frequency domain resource occupied by the SRS in the first frequency hopping sub-band during the second frequency hopping period. The first frequency hopping sub-band is one of multiple frequency hopping sub-bands. Transmit the SRS according to the first information.

[0273] When the communication device 1300 is used to implement Figure 6 In the method embodiment shown, the function of the network device is as follows: the processing unit calls the transceiver unit to execute:

[0274] Send first information to the terminal device. The first information indicates the frequency domain resources of the SRS. The frequency domain resources of the SRS include a first frequency domain unit and a second frequency domain unit. The first frequency domain unit and the second frequency domain unit are different. The first frequency domain unit is the frequency domain resource occupied by the SRS in the first frequency hopping sub-band during the first frequency hopping period. The second frequency domain unit is the frequency domain resource occupied by the SRS in the first frequency hopping sub-band during the second frequency hopping period. The first frequency hopping sub-band is one of multiple frequency hopping sub-bands. Receive the SRS from the terminal device according to the first information.

[0275] A more detailed description of the processing unit 1310 and the transceiver unit 1320 can be obtained directly from the relevant descriptions in the above method embodiments, and will not be repeated here.

[0276] like Figure 14 As shown, 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.

[0277] When the communication device 1400 is used to implement Figure 6 In the method shown, the processor 1410 is used to implement the functions of the processing unit 1310, and the interface circuit 1420 is used to implement the functions of the transceiver unit 1320.

[0278] When the aforementioned communication device is a chip applied to a terminal device, the terminal device chip implements the functions of the terminal device in the above method embodiments. The terminal device chip receives information from other modules (such as an RF module or antenna) in the terminal device, the information being sent to the terminal device by the network device; or, the terminal device chip sends information to other modules (such as an RF module or antenna) in the terminal device, the information being sent to the network device by the terminal device.

[0279] When the aforementioned communication device is a chip applied to 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 other modules (such as radio frequency modules or antennas) in the network device, which is information sent from the terminal device to the network device; or, the network device chip sends information to other modules (such as radio frequency modules or antennas) in the network device, which is information sent from the network device to the terminal device.

[0280] It is understood that the processor in the embodiments of this application may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. A general-purpose processor may be a microprocessor or any conventional processor.

[0281] The method steps in the embodiments of this application can be implemented in hardware or by a processor executing software instructions. The software instructions can consist of corresponding software modules, which can be stored in random access memory (RAM), flash memory, read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), 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. Of course, the storage medium can also be a component of the processor. The processor and storage medium can reside in an ASIC. Additionally, the ASIC can reside in a network device or a terminal device. Alternatively, the processor and storage medium can exist as discrete components in the network device or terminal device.

[0282] 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 disc (DVD); or it can be a semiconductor medium, such as a solid-state drive (SSD).

[0283] This application provides a communication system, which includes a network device and at least one terminal device. The network device is used to implement the functions of the network device in the above embodiments, and the terminal device is used to implement the functions of the terminal device in the above embodiments.

[0284] 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.

[0285] 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.

[0286] 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.

Claims

1. A communication method, characterized in that, The method includes: The system receives first information indicating the frequency domain resources of a sounding reference signal (SRS). The frequency domain resources of the SRS include a first frequency domain unit, a second frequency domain unit, and a third frequency domain unit. The first frequency domain unit is different from the second frequency domain unit. The first frequency domain unit is the frequency domain resource occupied by the SRS in a first frequency hopping sub-band during a first frequency hopping period. The second frequency domain unit is the frequency domain resource occupied by the SRS in the first frequency hopping sub-band during a second frequency hopping period. The first frequency hopping sub-band is one of multiple frequency hopping sub-bands. The third frequency domain unit is the frequency domain resource occupied by the SRS in the second frequency hopping sub-band during the first frequency hopping period. The second frequency hopping sub-band is a frequency hopping sub-band that is different from the first frequency hopping sub-band among the multiple frequency hopping sub-bands. The frequency domain offset of the starting position of the first frequency domain unit relative to the starting position of the first frequency hopping sub-band is the same as the frequency domain offset of the starting position of the third frequency domain unit relative to the starting position of the second frequency hopping sub-band. The SRS is sent based on the first information.

2. The method as described in claim 1, characterized in that, The first frequency domain unit is smaller than the frequency domain resources occupied by the first frequency hopping subband.

3. The method as described in claim 1 or 2, characterized in that, The first frequency domain unit and the second frequency domain unit constitute a resource block (RB); or the first frequency domain unit and the second frequency domain unit constitute multiple consecutive RBs.

4. The method as described in claim 1 or 2, characterized in that, The frequency domain offset of the starting position of the first frequency domain unit relative to the starting position of the first frequency hopping sub-band differs from the frequency domain offset of the starting position of the second frequency domain unit relative to the starting position of the first frequency hopping sub-band by N frequency domain units. The frequency domain width occupied by the N frequency domain units is less than the bandwidth of the first frequency hopping sub-band, and N is a positive integer.

5. The method as described in claim 1, characterized in that, The first frequency-hopping sub-band includes frequency domain unit one, frequency domain unit two, frequency domain unit three, and frequency domain unit four in frequency domain order; During four consecutive frequency hopping cycles, the frequency domain resource occupancy mode of the SRS in the first frequency hopping subband is any one of the following: The four consecutive frequency hopping cycles occupy frequency domain unit one, frequency domain unit three, frequency domain unit two, and frequency domain unit four in sequence. The four consecutive frequency hopping cycles occupy frequency domain unit two, frequency domain unit four, frequency domain unit one, and frequency domain unit three in sequence; The four consecutive frequency hopping cycles occupy frequency domain unit three, frequency domain unit two, frequency domain unit four, and frequency domain unit one in sequence. The four consecutive frequency hopping cycles occupy frequency domain unit four, frequency domain unit one, frequency domain unit three, and frequency domain unit two in sequence.

6. The method as described in claim 1, characterized in that, The first frequency-hopping sub-band includes frequency domain unit one, frequency domain unit two, frequency domain unit three, and frequency domain unit four in frequency domain order; During two consecutive frequency hopping cycles, the frequency domain resource occupancy mode of the SRS in the first frequency hopping subband is any one of the following: The two consecutive frequency hopping cycles occupy frequency domain unit one, frequency domain unit two, frequency domain unit three, and frequency domain unit four in sequence. The two consecutive frequency hopping cycles occupy frequency domain unit three and frequency domain unit four, frequency domain unit one and frequency domain unit two in sequence.

7. The method as described in claim 5 or 6, characterized in that, The first information indicates the frequency domain resource occupancy method of the SRS.

8. The method as described in claim 1 or 2, characterized in that, Sending the SRS according to the first information includes: The SRS is transmitted in a frequency-hopping manner on the plurality of frequency-hopping subbands.

9. A communication method, characterized in that, The method includes: A first message is sent, indicating the frequency domain resources of the SRS. The frequency domain resources of the SRS include a first frequency domain unit, a second frequency domain unit, and a third frequency domain unit. The first frequency domain unit is different from the second frequency domain unit. The first frequency domain unit is the frequency domain resource occupied by the SRS in the first frequency hopping sub-band during the first frequency hopping period. The second frequency domain unit is the frequency domain resource occupied by the SRS in the first frequency hopping sub-band during the second frequency hopping period. The first frequency hopping sub-band is one of a plurality of frequency hopping sub-bands. The third frequency domain unit is the frequency domain resource occupied by the SRS in the second frequency hopping sub-band during the first frequency hopping period. The second frequency hopping sub-band is a frequency hopping sub-band that is different from the first frequency hopping sub-band among the plurality of frequency hopping sub-bands. The frequency domain offset of the starting position of the first frequency domain unit relative to the starting position of the first frequency hopping sub-band is the same as the frequency domain offset of the starting position of the third frequency domain unit relative to the starting position of the second frequency hopping sub-band. The SRS is received based on the first information.

10. The method as described in claim 9, characterized in that, The first frequency domain unit is smaller than the frequency domain resources occupied by the first frequency hopping subband.

11. The method as described in claim 9 or 10, characterized in that, The first frequency domain unit and the second frequency domain unit constitute a single RB; or the first frequency domain unit and the second frequency domain unit constitute a series of consecutive RBs.

12. The method as described in claim 9 or 10, characterized in that, The frequency domain offset of the starting position of the first frequency domain unit relative to the starting position of the first frequency hopping sub-band differs from the frequency domain offset of the starting position of the second frequency domain unit relative to the starting position of the first frequency hopping sub-band by N frequency domain units. The frequency domain width occupied by the N frequency domain units is less than the bandwidth of the first frequency hopping sub-band, and N is a positive integer.

13. The method as described in claim 9, characterized in that, The first frequency-hopping sub-band includes frequency domain unit one, frequency domain unit two, frequency domain unit three, and frequency domain unit four in frequency domain order; During four consecutive frequency hopping cycles, the frequency domain resource occupancy mode of the SRS in the first frequency hopping subband is any one of the following: The four consecutive frequency hopping cycles occupy frequency domain unit one, frequency domain unit three, frequency domain unit two, and frequency domain unit four in sequence. The four consecutive frequency hopping cycles occupy frequency domain unit two, frequency domain unit four, frequency domain unit one, and frequency domain unit three in sequence; The four consecutive frequency hopping cycles occupy frequency domain unit three, frequency domain unit two, frequency domain unit four, and frequency domain unit one in sequence. The four consecutive frequency hopping cycles occupy frequency domain unit four, frequency domain unit one, frequency domain unit three, and frequency domain unit two in sequence.

14. The method as described in claim 9, characterized in that, The first frequency-hopping sub-band includes frequency domain unit one, frequency domain unit two, frequency domain unit three, and frequency domain unit four in frequency domain order; During two consecutive frequency hopping cycles, the frequency domain resource occupancy mode of the SRS in the first frequency hopping subband is any one of the following: The two consecutive frequency hopping cycles occupy frequency domain unit one, frequency domain unit two, frequency domain unit three, and frequency domain unit four in sequence. The two consecutive frequency hopping cycles occupy frequency domain unit three and frequency domain unit four, frequency domain unit one and frequency domain unit two in sequence.

15. The method as described in claim 13 or 14, characterized in that, The first information indicates the frequency domain resource occupancy method of the SRS.

16. A communication device, characterized in that, The device includes: a processing unit and a transceiver unit; The processing unit invokes the transceiver unit to execute: Receive first information, the first information indicating the frequency domain resources of the SRS, the frequency domain resources of the SRS including a first frequency domain unit, a second frequency domain unit, and a third frequency domain unit, wherein the first frequency domain unit is different from the second frequency domain unit, the first frequency domain unit is the frequency domain resource occupied by the SRS on the first frequency hopping sub-band in the first frequency hopping period, the second frequency domain unit is the frequency domain resource occupied by the SRS on the first frequency hopping sub-band in the second frequency hopping period, the first frequency hopping sub-band is one of a plurality of frequency hopping sub-bands; the third frequency domain unit is the frequency domain resource occupied by the SRS on the second frequency hopping sub-band in the first frequency hopping period, the second frequency hopping sub-band is a frequency hopping sub-band different from the first frequency hopping sub-band among the plurality of frequency hopping sub-bands; wherein the frequency domain offset of the starting position of the first frequency domain unit relative to the starting position of the first frequency hopping sub-band is the same as the frequency domain offset of the starting position of the third frequency domain unit relative to the starting position of the second frequency hopping sub-band; transmit the SRS according to the first information.

17. The apparatus as claimed in claim 16, characterized in that, The first frequency domain unit is smaller than the frequency domain resources occupied by the first frequency hopping subband.

18. The apparatus as claimed in claim 16 or 17, characterized in that, The first frequency domain unit and the second frequency domain unit constitute a single RB; or the first frequency domain unit and the second frequency domain unit constitute a series of consecutive RBs.

19. The apparatus as claimed in claim 16 or 17, characterized in that, The frequency domain offset of the starting position of the first frequency domain unit relative to the starting position of the first frequency hopping sub-band differs from the frequency domain offset of the starting position of the second frequency domain unit relative to the starting position of the first frequency hopping sub-band by N frequency domain units. The frequency domain width occupied by the N frequency domain units is less than the bandwidth of the first frequency hopping sub-band, and N is a positive integer.

20. The apparatus as claimed in claim 16, characterized in that, The first frequency-hopping sub-band includes frequency domain unit one, frequency domain unit two, frequency domain unit three, and frequency domain unit four in frequency domain order; During four consecutive frequency hopping cycles, the frequency domain resource occupancy mode of the SRS in the first frequency hopping subband is any one of the following: The four consecutive frequency hopping cycles occupy frequency domain unit one, frequency domain unit three, frequency domain unit two, and frequency domain unit four in sequence. The four consecutive frequency hopping cycles occupy frequency domain unit two, frequency domain unit four, frequency domain unit one, and frequency domain unit three in sequence; The four consecutive frequency hopping cycles occupy frequency domain unit three, frequency domain unit two, frequency domain unit four, and frequency domain unit one in sequence. The four consecutive frequency hopping cycles occupy frequency domain unit four, frequency domain unit one, frequency domain unit three, and frequency domain unit two in sequence.

21. The apparatus as claimed in claim 16, characterized in that, The first frequency-hopping sub-band includes frequency domain unit one, frequency domain unit two, frequency domain unit three, and frequency domain unit four in frequency domain order; During two consecutive frequency hopping cycles, the frequency domain resource occupancy mode of the SRS in the first frequency hopping subband is any one of the following: The two consecutive frequency hopping cycles occupy frequency domain unit one, frequency domain unit two, frequency domain unit three, and frequency domain unit four in sequence. The two consecutive frequency hopping cycles occupy frequency domain unit three and frequency domain unit four, frequency domain unit one and frequency domain unit two in sequence.

22. The apparatus as claimed in claim 20 or 21, characterized in that, The first information indicates the frequency domain resource occupancy method of the SRS.

23. The apparatus as claimed in claim 16 or 17, characterized in that, The processing unit invokes the transceiver unit to execute: The SRS is transmitted in a frequency-hopping manner on the plurality of frequency-hopping subbands.

24. A communication device, characterized in that, The device includes: a processing unit and a transceiver unit; The processing unit invokes the transceiver unit to execute: Send first information, which indicates the frequency domain resources of the SRS. The frequency domain resources of the SRS include a first frequency domain unit, a second frequency domain unit, and a third frequency domain unit. The first frequency domain unit is different from the second frequency domain unit. The first frequency domain unit is the frequency domain resource occupied by the SRS on the first frequency hopping sub-band during the first frequency hopping period. The second frequency domain unit is the frequency domain resource occupied by the SRS on the first frequency hopping sub-band during the second frequency hopping period. The first frequency hopping sub-band is one of a plurality of frequency hopping sub-bands. The third frequency domain unit is the frequency domain resource occupied by the SRS on the second frequency hopping sub-band during the first frequency hopping period. The second frequency hopping sub-band is a frequency hopping sub-band that is different from the first frequency hopping sub-band among the plurality of frequency hopping sub-bands. The frequency domain offset of the starting position of the first frequency domain unit relative to the starting position of the first frequency hopping sub-band is the same as the frequency domain offset of the starting position of the third frequency domain unit relative to the starting position of the second frequency hopping sub-band. Receive the SRS according to the first information.

25. The apparatus as claimed in claim 24, characterized in that, The first frequency domain unit is smaller than the frequency domain resources occupied by the first frequency hopping subband.

26. The apparatus as claimed in claim 24 or 25, characterized in that, The first frequency domain unit and the second frequency domain unit constitute a single RB; or the first frequency domain unit and the second frequency domain unit constitute a series of consecutive RBs.

27. The apparatus as claimed in claim 24 or 25, characterized in that, The frequency domain offset of the starting position of the first frequency domain unit relative to the starting position of the first frequency hopping sub-band differs from the frequency domain offset of the starting position of the second frequency domain unit relative to the starting position of the first frequency hopping sub-band by N frequency domain units. The frequency domain width occupied by the N frequency domain units is less than the bandwidth of the first frequency hopping sub-band, and N is a positive integer.

28. The apparatus as claimed in claim 24, characterized in that, The first frequency-hopping sub-band includes frequency domain unit one, frequency domain unit two, frequency domain unit three, and frequency domain unit four in frequency domain order; During four consecutive frequency hopping cycles, the frequency domain resource occupancy mode of the SRS in the first frequency hopping subband is any one of the following: The four consecutive frequency hopping cycles occupy frequency domain unit one, frequency domain unit three, frequency domain unit two, and frequency domain unit four in sequence. The four consecutive frequency hopping cycles occupy frequency domain unit two, frequency domain unit four, frequency domain unit one, and frequency domain unit three in sequence; The four consecutive frequency hopping cycles occupy frequency domain unit three, frequency domain unit two, frequency domain unit four, and frequency domain unit one in sequence. The four consecutive frequency hopping cycles occupy frequency domain unit four, frequency domain unit one, frequency domain unit three, and frequency domain unit two in sequence.

29. The apparatus as claimed in claim 24, characterized in that, The first frequency-hopping sub-band includes frequency domain unit one, frequency domain unit two, frequency domain unit three, and frequency domain unit four in frequency domain order; During two consecutive frequency hopping cycles, the frequency domain resource occupancy mode of the SRS in the first frequency hopping subband is any one of the following: The two consecutive frequency hopping cycles occupy frequency domain unit one, frequency domain unit two, frequency domain unit three, and frequency domain unit four in sequence. The two consecutive frequency hopping cycles occupy frequency domain unit three and frequency domain unit four, frequency domain unit one and frequency domain unit two in sequence.

30. The apparatus as claimed in claim 28 or 29, characterized in that, The first information indicates the frequency domain resource occupancy method of the SRS.

31. A communication device, characterized in that, The device includes a processor and an interface circuit, wherein the interface circuit is used to receive signals from other communication devices besides the communication device and transmit them to the processor, or to send signals from the processor to other communication devices besides the communication device, and the processor is used to implement the method as described in any one of claims 1 to 15 through logic circuits or execution code instructions.

32. A computer-readable storage medium, characterized in that, The storage medium stores a computer program or instructions, which, when executed by a communication device, implement the method as described in any one of claims 1 to 15.

33. A communication system, characterized in that, The communication system includes the communication device as described in any one of claims 16-23 and the communication device as described in any one of claims 24-30.

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