CN115707124A

CN115707124A - Transmission method and device of reference signal

Info

Publication number: CN115707124A
Application number: CN202110902764.XA
Authority: CN
Inventors: 龚名新; 张荻
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-08-06
Filing date: 2021-08-06
Publication date: 2023-02-17
Also published as: WO2023011109A1

Abstract

The application relates to the technical field of communication, and discloses a transmission method and device of a reference signal, which can improve the utilization rate of frequency domain resources in reference signal transmission. The method comprises the following steps: receiving reference signal configuration information from a network device; determining a first frequency domain resource according to the reference signal configuration information, where the first frequency domain resource is one of multiple frequency domain resources, the multiple frequency domain resources are part of a second frequency domain resource, and there is bandwidth inequality of at least two frequency domain resources in the multiple frequency domain resources, and the second frequency domain resource is a continuous segment of frequency domain resource; transmitting a reference signal on the first frequency domain resource.

Description

Transmission method and device of reference signal

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a transmission method and device of a reference signal.

Background

In a communication system, a Reference Signal (RS), which may also be referred to as a "pilot" signal, is a known signal provided by a transmitting end to a receiving end for channel estimation or channel sounding. The reference signals are divided into uplink reference signals and downlink reference signals. The uplink reference signal refers to a signal sent by the terminal device to the network device, that is, the sending end is the terminal device, and the receiving end is the network device. The uplink reference signal is used for uplink channel estimation (for coherent demodulation and detection of network devices or for calculating precoding) and uplink channel quality measurement. The uplink reference signal may include: demodulation reference signal (DMRS) and Sounding Reference Signal (SRS). The SRS may be used for estimating the uplink channel quality and selecting a channel, calculating a signal to interference plus noise ratio (SINR) of the uplink channel, and may also be used for acquiring an uplink channel coefficient. In a time-division duplex (TDD) scenario, an uplink channel and a downlink channel have reciprocity, and the SRS can also be used to obtain a downlink channel coefficient.

However, in the prior art, when frequency domain resources are allocated for SRS transmission, the resource allocation utilization rate is low, and there is a problem of resource waste.

Disclosure of Invention

The embodiment of the application provides a transmission method and device of a reference signal, which can improve the utilization rate of frequency domain resources for the transmission of the reference signal.

In a first aspect, an embodiment of the present application provides a method for transmitting a reference signal, where the method includes: receiving reference signal configuration information from a network device; determining a first frequency domain resource according to the reference signal configuration information, where the first frequency domain resource is one of multiple frequency domain resources, the multiple frequency domain resources are part of a second frequency domain resource, and there is bandwidth inequality of at least two frequency domain resources in the multiple frequency domain resources, and the second frequency domain resource is a continuous segment of frequency domain resource; transmitting a reference signal on the first frequency domain resource. The first frequency domain resource may refer to an RB occupied by the terminal device for sending the reference signal, and the second frequency domain resource may refer to an RB corresponding to a reference signal frequency hopping bandwidth configured for the terminal device by the network device.

By adopting the method, when the number of RBs included in the second frequency domain resource cannot be evenly divided by the number of the frequency domain resources, the RBs included in the second frequency domain resource can be distributed to a plurality of terminal devices for use in an unequally dividing mode, so that the frequency domain resources are fully utilized, and the waste of the frequency domain resources is avoided.

In one possible design, the plurality of frequency domain resources do not overlap with each other and a sum of bandwidths is equal to a bandwidth of the second frequency domain resource.

In the above design, the plurality of frequency domain resources are not overlapped with each other, and the sum of the bandwidths is equal to the bandwidth of the second frequency domain resource, so that the frequency domain resources can be fully utilized, resource waste is avoided, and the problem of frequency domain resource transmission collision when the plurality of terminal devices transmit the reference signal in the second frequency domain resource in a frequency division multiplexing manner (that is, when the plurality of terminal devices are scheduled to transmit the reference signal in different frequency domain resources) when the plurality of terminal devices transmit the reference signal is avoided.

In one possible design, the reference signal configuration information includes a fractional bandwidth factor P _F And a partial bandwidth frequency domain location factor K _F Said P is _F Indicating the number of the plurality of frequency domain resources, K _F Indicating a location of the first frequency-domain resource in the plurality of frequency-domain resources.

In one possible design, a bandwidth of any one of the plurality of frequency domain resources is a first bandwidth or a second bandwidth, and the first bandwidth and the second bandwidth are not equal.

In the above design, it is beneficial to ensure that the number of RBs included in the plurality of frequency domain resources is the same or similar, and the problem of imbalance of the frequency domain resources occupied by the plurality of terminal devices when the plurality of terminal devices are scheduled to transmit the reference signal in the frequency division multiplexing mode in the second frequency domain resource is avoided.

In one possible design, the plurality of frequency domain resources includes: the frequency domain resources with the bandwidth of X are frequency domain resources with a first bandwidth and the frequency domain resources with the bandwidth of Y are frequency domain resources with a second bandwidth, wherein each frequency domain resource with the bandwidth of the first bandwidth comprises RB of which the number is an integral multiple of L obtained by dividing M by N upwards, each frequency domain resource with the bandwidth of the second bandwidth comprises RB of which the number is an integral multiple of L obtained by dividing M by N downwards, M is the number of RB included by the second frequency domain resource, X is the remainder of M by dividing L by N, Y is the difference between N and X, L is an integer larger than or equal to 1, and N is the number of the plurality of frequency domain resources. Optionally, L is 1 or 4.

By adopting the design, the frequency domain resources can be fully utilized through the upward rounding rule or the downward rounding rule, and the waste of the frequency domain resources is avoided.

In one possible design, the plurality of frequency domain resources are located at a position i in the second frequency domain resource, i is 0,1, \ 8230in order from the low frequency to the high frequency of the second frequency domain resource, N-1, N is the number of the plurality of frequency domain resources; when i is an integer which is smaller than or equal to (N-1) divided by 2 to be rounded down and is larger than 0, the number of RBs included in the frequency domain resource corresponding to the position i-1 is larger than or equal to the number of RBs included in the frequency domain resource corresponding to the position i; and when i is an integer which is greater than (N-1) divided by 2 and is rounded down and less than N-1, the number of RBs included in the frequency domain resource corresponding to the position i +1 is greater than or equal to the number of RBs included in the frequency domain resource corresponding to the position i.

By adopting the design, the distribution of the plurality of frequency domain resources meets the condition, and the channel estimation performance of the terminal equipment which occupies the frequency domain resources at the edge side of the second frequency domain resource and transmits the reference signal can be ensured.

In one possible design, the reference signal is a sounding reference signal, SRS.

In a second aspect, an embodiment of the present application provides a method for transmitting a reference signal, where the method includes: receiving reference signal configuration information from network equipment; determining a first frequency domain resource according to the reference signal configuration information, wherein the first frequency domain resource is one of a plurality of frequency domain resources, the plurality of frequency domain resources are respectively part of a second frequency domain resource, the second frequency domain resource sequentially comprises a first idle frequency domain resource, the plurality of frequency domain resources and a second idle frequency domain resource from low frequency to high frequency, and the second frequency domain resource is a continuous section of frequency domain resource; transmitting a reference signal on the first frequency domain resource.

By adopting the method, the RB at the edge side of the second frequency domain resource can not be sent with the reference signal, and the interference brought by the out-of-band leakage to other terminal equipment for transmitting data and the like on the adjacent frequency domain resource of the second frequency domain resource can be reduced.

In one possible design, the first idle frequency domain resource, the plurality of frequency domain resources, and the second idle frequency domain resource do not overlap with each other, and a sum of bandwidths is equal to a bandwidth of the second frequency domain resource.

In the above design, the multiple frequency domain resources are not overlapped with each other, and the sum of the bandwidths is equal to the bandwidth of the second frequency domain resource, so that the frequency domain resources can be fully utilized, resource waste is avoided, and the problem that the frequency domain resources for the multiple terminal devices to send the reference signals conflict when the multiple terminal devices send the reference signals in the second frequency domain resource in a frequency division multiplexing manner (that is, when the multiple terminal devices are scheduled to send the reference signals in different frequency domain resources) is avoided.

In one possible design, the reference signal configuration information includes a fractional bandwidth factor P _F And a partial bandwidth frequency domain location factor K _F Said P is _F Indicating the number of the plurality of frequency domain resources, K _F Indicating a position of the first frequency-domain resource in the plurality of frequency-domain resources.

In one possible design, each of the plurality of frequency domain resources includes resource blocks RB that are an integer multiple of M divided by N, where M is the number of RBs included in the second frequency domain resource, L is an integer greater than or equal to 1, and N is the number of the plurality of frequency domain resources; when O can be divided by 2, the first idle frequency domain resource and the second idle frequency domain resource each include O divided by 2 number of RBs, the O is equal to M divided by L and the remainder of the division by N multiplied by the value of L; or, when O is not divisible by 2, the first idle frequency domain resource includes O divided by 2 rounded up number of RBs, the second idle frequency domain resource includes O divided by 2 rounded down number of RBs; or, when O is not divisible by 2, the first idle frequency domain resource includes O divided by 2 rounded down number of RBs, and the second idle frequency domain resource includes O divided by 2 rounded up number of RBs.

By adopting the design, the low-frequency edge side and the high-frequency edge side of the second frequency domain resource are provided with more idle RBs to inhibit the interference brought by the out-of-band leakage to other terminal equipment for transmitting data and the like on the adjacent frequency domain resource of the second frequency domain resource.

In one possible design, the L is 1 or 4.

In one possible design, there may be at least two of the plurality of frequency domain resources that are not equal in bandwidth.

In a third aspect, an embodiment of the present application provides a method for transmitting a reference signal, where the method includes: determining a first frequency domain resource according to reference signal configuration information sent to a terminal device, where the first frequency domain resource is one of multiple frequency domain resources, the multiple frequency domain resources are part of a second frequency domain resource, and bandwidths of at least two frequency domain resources in the multiple frequency domain resources are unequal, and the second frequency domain resource is a continuous segment of frequency domain resource; receiving a reference signal on the first frequency-domain resource.

In one possible design, the plurality of frequency domain resources includes: the frequency domain resources with the bandwidth of X are frequency domain resources with a first bandwidth and the frequency domain resources with the bandwidth of Y are frequency domain resources with a second bandwidth, wherein each frequency domain resource with the bandwidth of the first bandwidth comprises RB of which the number is an integral multiple of L obtained by dividing M by N upwards, each frequency domain resource with the bandwidth of the second bandwidth comprises RB of which the number is an integral multiple of L obtained by dividing M by N downwards, M is the number of RB included by the second frequency domain resource, X is the remainder of M by dividing L by N, Y is the difference between N and X, L is an integer larger than or equal to 1, and N is the number of the plurality of frequency domain resources.

In one possible design, the L is 1 or 4.

In one possible design, the plurality of frequency domain resources are located at a position i in the second frequency domain resource, i is 0,1, \ 8230in order from the low frequency to the high frequency of the second frequency domain resource, N-1, N is the number of the plurality of frequency domain resources; when i is an integer which is smaller than or equal to (N-1) divided by 2 to be rounded down and is larger than 0, the number of RBs included in the frequency domain resource corresponding to the position i-1 is larger than or equal to the number of RBs included in the frequency domain resource corresponding to the position i; and when i is an integer which is larger than (N-1) divided by 2 and is rounded down and smaller than N-1, the number of RBs included in the frequency domain resource corresponding to the position i +1 is larger than or equal to the number of RBs included in the frequency domain resource corresponding to the position i.

In a fourth aspect, an embodiment of the present application provides a method for transmitting a reference signal, where the method includes: determining a first frequency domain resource according to reference signal configuration information sent to a terminal device, wherein the first frequency domain resource is one of a plurality of frequency domain resources, the plurality of frequency domain resources are respectively part of a second frequency domain resource, the second frequency domain resource sequentially comprises a first idle frequency domain resource, the plurality of frequency domain resources and a second idle frequency domain resource from low frequency to high frequency, and the second frequency domain resource is a section of continuous frequency domain resource; receiving a reference signal on the first frequency domain resource.

In one possible design, each of the plurality of frequency domain resources includes resource blocks RB that are an integer multiple of M divided by N, where M is the number of RBs included in the second frequency domain resource, L is an integer greater than or equal to 1, and N is the number of the plurality of frequency domain resources; when O can be divided by 2, the first and second idle frequency domain resources each include O divided by 2 number of RBs, the O is equal to M divided by L and the remainder divided by N multiplied by the value of L; or, when O cannot be divided exactly by 2, the first idle frequency-domain resource includes O divided by 2 rounded up number of RBs, the second idle frequency-domain resource includes O divided by 2 rounded down number of RBs; or, when O is not divisible by 2, the first idle frequency domain resource includes O divided by 2 rounded down number of RBs, and the second idle frequency domain resource includes O divided by 2 rounded up number of RBs.

In one possible design, the L is 1 or 4.

In a fifth aspect, an embodiment of the present application provides a communication apparatus, where the apparatus has a function of implementing a method in any one of the above-mentioned first aspect or any one of the above-mentioned possible designs of the first aspect, or implementing a method in any one of the above-mentioned second aspect or any one of the above-mentioned possible designs of the second aspect, where the function may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules (or units) corresponding to the above functions, such as a transceiver unit and a processing unit.

In one possible design, the device may be a chip or an integrated circuit.

In one possible design, the apparatus includes a memory and a processor, the memory is used for storing a program executed by the processor, and when the program is executed by the processor, the apparatus may perform the method in the first aspect or any one of the possible designs of the first aspect, or perform the method in any one of the possible designs of the second aspect or the second aspect.

In one possible design, the apparatus may be a terminal device.

In a sixth aspect, an embodiment of the present application provides a communication apparatus, where the apparatus has a function of implementing a method in any one of the possible designs of the third aspect or the third aspect, or implementing a method in any one of the possible designs of the fourth aspect or the fourth aspect, where the function may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules (or units) corresponding to the above functions, such as a transceiver unit and a processing unit.

In one possible design, the device may be a chip or an integrated circuit.

In one possible design, the apparatus includes a memory and a processor, the memory is used for storing a program executed by the processor, and when the program is executed by the processor, the apparatus may perform the method in the third aspect or any one of the possible designs of the third aspect, or perform the method in any one of the possible designs of the fourth aspect or the fourth aspect.

In one possible design, the apparatus may be a network device.

In a seventh aspect, an embodiment of the present application provides a communication system, where the communication system includes a terminal device and a network device, where the terminal device may perform the method in any one of the possible designs of the first aspect or the first aspect, and the network device may perform the method in any one of the possible designs of the third aspect or the third aspect; or the terminal device may perform the method of the second aspect or any of the possible designs of the second aspect, and the network device may perform the method of the fourth aspect or any of the possible designs of the fourth aspect.

In an eighth aspect, the present application provides a computer-readable storage medium, where a computer program or instructions are stored, and when the computer program or instructions are executed by a communication device, the computer program or instructions may implement the method in the first aspect or any one of the possible designs of the first aspect, or the method in the second aspect or any one of the possible designs of the second aspect, or the method in the third aspect or any one of the possible designs of the third aspect, or the method in any one of the possible designs of the fourth aspect.

In a ninth aspect, the present application further provides a computer program product, which includes a computer program or instructions, and when the computer program or instructions are executed by a communication device, the method described in the first aspect or any one of the possible designs of the first aspect, or the method described in the second aspect or any one of the possible designs of the second aspect, or the method described in the third aspect or any one of the possible designs of the third aspect, or the method described in any one of the possible designs of the fourth aspect.

In a tenth aspect, an embodiment of the present application further provides a chip, which is coupled to a memory, and configured to read and execute a program or an instruction stored in the memory to implement the method described in the foregoing first aspect or any one of the possible designs of the first aspect, or to implement the method described in the foregoing second aspect or any one of the possible designs of the second aspect, or to implement the method described in the foregoing third aspect or any one of the possible designs of the third aspect, or to implement the method described in any one of the possible designs of the fourth aspect or the fourth aspect.

For technical effects achieved by the third aspect to the tenth aspect, please refer to the technical effects achieved by the first aspect or the second aspect, which will not be repeated herein.

Drawings

Fig. 1 is a schematic architecture diagram of a communication system according to an embodiment of the present application;

fig. 2A and fig. 2B are schematic diagrams of SRS transmission according to an embodiment of the present application;

fig. 3 is a schematic diagram of frequency domain resources occupied by SRS in different SRS transmission modes according to an embodiment of the present application;

fig. 4 is a schematic diagram illustrating that a terminal device transmits an SRS in a frequency hopping manner according to an embodiment of the present application;

fig. 5 is a second schematic diagram illustrating that the terminal device transmits the SRS in a frequency hopping manner according to the embodiment of the present application;

fig. 6 is a schematic diagram of a frequency domain resource occupying manner according to an embodiment of the present application;

fig. 7 is a second schematic diagram illustrating a frequency domain resource occupying manner according to an embodiment of the present invention;

fig. 8 is a schematic diagram of a transmission method according to an embodiment of the present application;

fig. 9 is a schematic diagram of frequency domain resource distribution according to an embodiment of the present application;

fig. 10 is a second schematic diagram of frequency domain resource distribution according to an embodiment of the present application;

fig. 11 is a third schematic diagram of frequency domain resource distribution according to an embodiment of the present application;

fig. 12 is a fourth schematic diagram illustrating frequency domain resource distribution according to an embodiment of the present application;

fig. 13 is a fifth schematic diagram of frequency domain resource distribution according to an embodiment of the present application;

fig. 14 is a sixth schematic view of frequency domain resource distribution according to an embodiment of the present application;

fig. 15A and fig. 15B are schematic diagrams of a second frequency domain resource provided in the embodiment of the present application;

fig. 16A and fig. 16B are schematic diagrams of a second frequency domain resource provided in the embodiment of the present application;

fig. 17 is a second schematic diagram of a transmission method according to a second embodiment of the present application;

fig. 18A and 18B are seven and eight schematic diagrams of frequency domain resource distribution according to an embodiment of the present application;

fig. 19 is a ninth schematic diagram illustrating frequency domain resource distribution according to an embodiment of the present application;

fig. 20 is a schematic diagram of a communication device according to an embodiment of the present application;

fig. 21 is a second schematic diagram of a communication device according to an embodiment of the present application.

Detailed Description

Fig. 1 is a schematic architecture diagram of a communication system applied to an embodiment of the present application. As shown in fig. 1, the communication system 1000 includes a radio access network 100 and a core network 200, and optionally, the communication system 1000 may further include an internet 300. The radio access network 100 may include at least one network device, such as 110a and 110b in fig. 1, and may further include at least one terminal device, such as 120a-120j in fig. 1. Wherein 110a is a base station, 110b is a micro station, 120a, 120e, 120f and 120j are mobile phones, 120b is an automobile, 120c is a fuel dispenser, 120d is a Home Access Point (HAP) disposed indoors or outdoors, 120g is a notebook computer, 120h is a printer, and 120i is an unmanned aerial vehicle. The same terminal device or network device may provide different functions in different application scenarios. For example, the mobile phones in fig. 1 include 120a, 120e, 120f, and 120j, the mobile phone 120a may access the base station 110a, connect to the car 120b, directly communicate with the mobile phone 120e and access to the HAP, the mobile phone 120b may access the HAP and directly communicate with the mobile phone 120a, the mobile phone 120f may access to the micro-station 110b, connect to the laptop computer 120g, connect to the printer 120h, and the mobile phone 120j may control the drone 120i.

The terminal equipment is connected with the network equipment, and the network equipment is connected with the core network. The core network device and the network device may be separate physical devices, or the function of the core network device and the logic function of the network device may be integrated on the same physical device, or a physical device may be integrated with a part of the function of the core network device and a part of the function of the network device. The terminal equipment and the network equipment can be connected with each other in a wired or wireless mode. Fig. 1 is a schematic diagram, and other devices, such as a wireless relay device and a wireless backhaul device, may also be included in the communication system, which are not shown in fig. 1.

A network device, which may also be referred to as a radio access network device, may be a base station (base station), an evolved NodeB (eNodeB), a Transmission and Reception Point (TRP), a next generation base station (gNB) in a fifth generation (5th generation, 5g) mobile communication system, a base station in a sixth generation (6th generation, 6g) mobile communication system, a base station in a future mobile communication system, an access node in a WiFi system, or the like; the present invention may also be a module or a unit that performs part of the functions of the base station, for example, a Centralized Unit (CU) or a Distributed Unit (DU). The CU herein completes a function of a radio resource control protocol (rrc) and a packet data convergence layer (PDCP) of the base station, and may also complete a function of a Service Data Adaptation Protocol (SDAP); the DU performs functions of a radio link control (rlc) layer and a Medium Access Control (MAC) layer of the base station, and may also perform functions of a part of or all of a physical layer, and for detailed descriptions of the above protocol layers, reference may be made to related technical specifications of the third generation partnership project (3 rd generation partnership project,3 gpp). The network device may be a macro base station (e.g., 110a in fig. 1), a micro base station or an indoor station (e.g., 110b in fig. 1), a relay node or a donor node, etc. The embodiments of the present application do not limit the specific technologies and the specific device forms used by the network devices.

A terminal device may also be referred to as a terminal, user Equipment (UE), a mobile station, a mobile terminal, etc. The terminal device can be widely applied to various scenes, for example, device-to-device (D2D), vehicle-to-equipment (V2X) communication, machine-type communication (MTC), internet of things (IOT), virtual reality, augmented reality, industrial control, automatic driving, telemedicine, smart grid, smart furniture, smart office, smart wearing, smart transportation, smart city, and the like. The terminal equipment can be a mobile phone, a tablet personal computer, a computer with a wireless transceiving function, wearable equipment, a vehicle, an unmanned aerial vehicle, a helicopter, an airplane, a steamship, a robot, a mechanical arm, intelligent household equipment and the like. The embodiment of the present application does not limit the specific technology and the specific device form adopted by the terminal device.

The network device and the terminal device may be fixed in location or may be mobile. The network equipment and the terminal equipment can be deployed on the land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on the water surface; it may also be deployed on airborne airplanes, balloons and satellite vehicles. The embodiment of the application does not limit the application scenarios of the network device and the terminal device.

The roles of network devices and terminal devices may be relative, e.g., helicopter or drone 120i in fig. 1 may be configured as a mobile network device, for those terminal devices 120j that access radio access network 100 through 120i, terminal device 120i is a network device; however, for the

network device

110a, 120i is a terminal device, that is, the network device 110a and the network device 120i communicate with each other through a wireless air interface protocol. Of course, 110a and 120i may communicate with each other through an interface protocol between the network device and the network device, and in this case, 120i is also a network device as compared with 110 a. Therefore, both the network device and the terminal device can be collectively referred to as a communication apparatus, 110a and 110b in fig. 1 can be referred to as a communication apparatus having a network device function, and 120a to 120j in fig. 1 can be referred to as a communication apparatus having a terminal device function.

The communication between the network equipment and the terminal equipment, between the network equipment and the network equipment, and between the terminal equipment and the terminal equipment can be carried out through a licensed spectrum, an unlicensed spectrum, a licensed spectrum and the unlicensed spectrum; communication may be performed in a frequency spectrum of 6 gigahertz (GHz) or less, in a frequency spectrum of 6GHz or more, or in a frequency spectrum of 6GHz or less and in a frequency spectrum of 6GHz or more. The embodiments of the present application do not limit the spectrum resources used for wireless communication.

In the embodiments of the present application, the functions of the network device may also be performed by a module (e.g., a chip) in the network device, or may also be performed by a control subsystem including the functions of the network device. The control subsystem including the network device function may be a control center in the above application scenarios such as a smart grid, industrial control, smart transportation, smart city, and the like. The functions of the terminal device may be performed by a module (e.g., a chip or a modem) in the terminal device, or may be performed by a device including the functions of the terminal device.

In the application, the network equipment sends downlink signals or downlink information to the terminal equipment, and the downlink information is carried on a downlink channel; the terminal equipment sends uplink signals or uplink information to the network equipment, and the uplink information is carried on an uplink channel. In order for a terminal device to communicate with a network device, it needs to establish a radio connection with a cell controlled by the network device. The cell in which a radio connection is established with a terminal device is called the serving cell of the terminal device. When the terminal device communicates with the serving cell, it is also interfered by signals from neighboring cells.

In addition, in the embodiment of the present application, the time domain symbol may be an Orthogonal Frequency Division Multiplexing (OFDM) symbol, or may be a Discrete Fourier Transform spread-spectrum-OFDM (DFT-s-OFDM) symbol. The symbols in the embodiments of the present application all refer to time domain symbols, if not otherwise specified.

Technical concepts and parts of words involved in the embodiments of the present application are explained below in order to facilitate understanding by those skilled in the art.

1) And SRS. The SRS is a reference signal that can be used for estimating the quality of the uplink channel and selecting the channel, calculating the SINR of the uplink channel, and also can be used for obtaining the uplink channel coefficient. In a TDD scenario, an uplink channel and a downlink channel have reciprocity, and the SRS may also be used to obtain a downlink channel coefficient. As an example, when uplink channel quality measurement or estimation is needed, the network device may indicate a frequency band (i.e., one or more continuous RBs) to be measured to the terminal device through RRC signaling, and if the channel condition of the terminal device is good, the network device may indicate the terminal device to transmit an SRS in a non-frequency hopping manner, that is, the SRS transmitted once on one symbol covers the entire frequency band to be measured; if the channel condition of the terminal device is poor, the SRS signal-to-noise ratio is low because the SRS transmitted once covers the whole frequency band to be measured, and at this time, the network device instructs the terminal device to transmit the SRS on a plurality of symbols respectively in a frequency hopping manner. The terminal device transmits SRS each time to cover only a part of the whole frequency band to be measured, and the RBs covered by the SRS each time can be called a frequency hopping sub-band.

Taking the bandwidth of the frequency band to be measured as 32 RBs, that is, the overall SRS bandwidth is 32 RBs, when the channel condition of the terminal device is better, as shown in fig. 2A, fig. 2A is a schematic diagram of transmitting the SRS in a non-frequency hopping manner, where each square represents 2 RBs in the frequency domain and 1 symbol in the time domain, and the network device instructs the terminal device to transmit the SRS on one symbol in the non-frequency hopping manner, where the SRS frequency hopping bandwidth is equal to the overall SRS bandwidth, and is 32 RBs. When the channel condition of the terminal device is poor, as shown in fig. 2B, fig. 2B is a schematic diagram of sending an SRS in a frequency hopping manner, where each square represents 2 RBs in a frequency domain and 1 symbol in a time domain, then the network device may instruct the terminal device to send the SRS in the frequency hopping manner, where the SRS hopping bandwidth is different from the overall SRS bandwidth, for example, the SRS hopping bandwidth is 8 RBs, as shown in fig. 2B, the terminal device sends the SRS on 4 symbols respectively, the SRS sent each time only covers 8 RBs (i.e., one hopping subband), and the SRS sent 4 times covers 32 RBs, i.e., covers the entire band to be measured.

The specific network device may configure an SRS resource for the terminal device through Radio Resource Control (RRC) signaling, and the like, where the signaling may indicate information such as a number of antenna ports (ports), a frequency domain position and a time domain position occupied by the SRS resource, a period of use, comb teeth, a cyclic shift value, and a sequence identity number (identity). Wherein the frequency domain location at which the SRS is transmitted is determined by a set of frequency domain parameters in RRC signaling, the frequency domain parameters including n _RRC ，n _shift ，B _SRS ，C _SRS ，b _hop . The terminal device can determine the frequency domain position of the transmitted SRS through these frequency domain parameters and the rule predetermined by the protocol (as shown in table 1 below), for example, the frequency domain start position of the frequency band in which the SRS is transmitted (i.e., the SRS frequency domain start position), the bandwidth of the frequency band in which the SRS is transmitted (i.e., the SRS overall bandwidth), the bandwidth of each hopping sub-band in the frequency band in which the SRS is transmitted (i.e., the SRS hopping bandwidth), and whether or not to determine whether or not to transmit the SRSThe SRS needs to be transmitted by frequency hopping.

Wherein n is _RRC Indicating the frequency domain starting position index, n, of the user SRS _shift Indicating an offset value available for SRS transmission starting at low frequencies of the uplink system bandwidth, C _SRS Index number configured for SRS Bandwidth, b _hop Indicating SRS Overall Bandwidth, B _SRS Indicating the SRS hopping bandwidth.

Wherein, the SRS frequency domain starting position: the terminal equipment configures n for the terminal equipment according to the network equipment _RRC ,n _shift And (4) determining. For example, when the network device is configured as the terminal device, the parameter is b _hop ＝0，C _SRS ＝9，B _SRS And (2). The overall bandwidth of the SRS, the frequency hopping bandwidth of the SRS, and whether the terminal device transmits the SRS in a frequency hopping manner or in a non-frequency hopping manner can be determined according to the above parameters.

Determination of the overall SRS bandwidth: the terminal equipment configures the parameter b for the terminal equipment according to the network equipment _hop And C _SRS And Table 1 identifies the number of RBs m occupied by the SRS as a whole _SRS,b′ Wherein b' = b _hop . For example, suppose b _hop ＝0，C _SRS =9, the terminal device may determine m by looking up table 1 _SRS,b′ =32 srs overall bandwidth is 32 RBs.

Determination of SRS hopping bandwidth: the terminal equipment configures the parameter B for the terminal equipment according to the network equipment _SRS And C _SRS And Table 1 determines the number of RBs m occupied by SRS on each symbol _SRS,b That is, the number of RBs corresponding to the frequency hopping sub-band of each frequency hopping of the SRS is determined, wherein B = B _SRS . For example, suppose B _SRS ＝2，C _SRS =9, the terminal device may determine m by looking up table 1 _SRS,b =8, determine SRS hopping bandwidth to be 8 RBs.

The determination process of whether the terminal equipment transmits the SRS by a frequency hopping mode or a non-frequency hopping mode comprises the following steps:

when b is _hop ≥B _SRS When the terminal device is in the normal mode, the terminal device is enabled to use the frequency hopping mode. That is, the terminal device transmits the SRS in a non-frequency hopping manner. It should be understood that non-frequency hopping parties are employedIn the case of equation, the SRS transmitted by the terminal device at a time covers the entire configured frequency band.

When b is _hop <B _SRS The terminal device enables the frequency hopping mode. That is, the terminal device transmits the SRS in a frequency hopping manner.

In the above example, b is due to _hop ＝0，B _SRS =2, therefore b _hop <B _SRS . And the terminal equipment transmits the SRS in a frequency hopping mode.

It should be understood that, in the case of transmitting the SRS in a frequency hopping manner, the terminal device transmits the SRS on a plurality of symbols, respectively, each time the SRS is transmitted covers only a part of the configured entire frequency band (i.e., one frequency hopping sub-band), and the terminal device transmits the SRS multiple times within one frequency hopping period to cover the configured entire frequency band. The frequency hopping times of one frequency hopping period is equal to the number of times that the terminal equipment needs to send the SRS in one frequency hopping period, and the frequency hopping times is m _SRS,b′ And m _SRS,b The ratio of (c), i.e. the number of hops, can be expressed as:

wherein N is _b According to C _SRS And Table 1, in Table 1, N _b B in (1) is 0,1,2,3, respectively. For example, suppose b _hop ＝0，C _SRS ＝9，B _SRS =2, the number of hops is equal to 2 × 2=4.

The frequency hopping mode can follow the rule of a tree structure, and the frequency hopping mode can ensure that the interval between bandwidths occupied by two adjacent symbols is relatively large. Also with b above _hop ＝0，C _SRS ＝9，B _SRS In an exemplary frequency hopping manner, the frequency hopping is as shown in fig. 2B, where each square represents 2 RBs in the frequency domain and 1 symbol in the time domain, the terminal device transmits an SRS on multiple symbols respectively, each SRS transmitted covers only one frequency hopping sub-band, and the configured entire frequency band is covered by transmitting the SRS 4 times.

TABLE 1

2) And partial SRS.

The partial SRS may also be referred to as partial sounding, and is a method for transmitting the SRS, and the number of terminal devices transmitting the SRS in the frequency band may be increased by transmitting the SRS in the partial RBs of the frequency band. As shown in fig. 3, each long lattice represents 1 RB in the frequency domain, for a frequency band including 8 RBs, terminal device 1 transmits SRS on the frequency band including 8 RBs before transmitting SRS in a manner of not using partial SRS, and after transmitting SRS in a manner of using partial SRS, terminal device 1 may transmit SRS according to partial bandwidth factor P indicated by the network device _F Dividing the frequency band into P _F Sub-bands, each sub-band comprising 8 divided by P _F One RB, terminal device 1 occupies one of the sub-bands to transmit SRS, in figure 3 with P _F For example, for 4, each subband includes 2 RBs, and terminal device 1 occupies the subband at position 0 to transmit SRS, for the subbands at positions 1,2, and 3, the network device may instruct other terminal devices to transmit SRS, increase the number of terminal devices transmitting SRS on the frequency band, and achieve an increase in SRS capacity on the frequency band.

The SRS is transmitted by using the partial SRS, and can also be transmitted on partial RBs of the frequency hopping sub-band, as shown in fig. 4, each square represents 2 RBs in the frequency domain, represents 1 symbol in the time domain, 8 RBs on each symbol are one frequency hopping sub-band, and the network device indicates a partial bandwidth factor P _F The frequency hopping sub-bands on each symbol may be further divided into P _F Sub-bands, each terminal device occupies one of the sub-bands to transmit SRS, wherein P is used in fig. 4 _F Is 4 as an example, mostMore than 4 terminal devices may be allowed to transmit SRS on a frequency hopped sub-band. It should be understood that, when only one terminal device occupies one sub-band in fig. 4, the sub-band occupied by the terminal device indicated by the network device to transmit the SRS may be located in any part of the frequency hopping sub-band, as shown in fig. 5, and may be located in the middle part, the first half part, or the second half part of the frequency hopping sub-band.

Currently, when a partial SRS is transmitted, a frequency domain position and a bandwidth of an RB (i.e., a subband for transmitting the SRS) for transmitting the SRS by a terminal device in a frequency band are generally determined by one of the following methods:

assuming that the bandwidth of a frequency band is M RBs (M is a multiple of 4), a partial SRS supports a terminal device therein

Transmitting SRS over consecutive RBs, i.e., a bandwidth supporting one sub-band of

The starting position of the RB occupied by the terminal equipment for sending the SRS is the second position in M RBs

RB where k _F Has a value range of 0,1,2, \8230, P _F -1. In one possible embodiment, P _F May have a value of 2,3,4 or 8. For example, M =20,p _F =4, when k _F If =0, the partial SRS supports SRS transmission on RB0 to RB4, and when k is equal to _F When =1, the partial SRS supports SRS transmission on RB5 to RB9, and so on.

When the number M of RBs corresponding to the bandwidth of the frequency band is not P _F When the integer multiple is used, the number of RBs actually contained in the sub-band is not an integer, and one solution is to use the integer multiple as the number of RBs actually contained in the sub-band

Rounding is performed, e.g. M =20,p _F =3, can be to

Rounding down to 6, i.e. the bandwidth of a sub-band is 6 RBs. In addition, companies have proposed that the number of RBs limiting a sub-band is an integer multiple of 4, and one method is to perform the same for each RB

Rounded to a multiple of 4, e.g., M =20,p _F =4, can be to

Rounding down to 4, i.e. the bandwidth of the sub-band is 4 RBs.

However, whether it is a pair

Rounding to an integer or a multiple of 4 will result in no SRS transmission on part of RBs, resulting in waste of resources.

Number of RBs M =20,p corresponding to frequency band _F =3, for

Taking an example of rounding up to 6, that is, the bandwidth of a sub-band is 6 RBs, and one terminal device transmits SRS over 6 RBs, as shown in fig. 6, where each long lattice represents 1 RB in the frequency domain, only 18 RBs of 20 RBs can be allocated to 3 terminal devices to transmit SRS, and 2 RBs are idle RBs and cannot be used to transmit SRS.

Number of RBs M =20,p corresponding to frequency band _F =4, for

Taking 4 as an example, that is, the bandwidth of the sub-band is 4 RBs, and one terminal device transmits the SRS on 4 RBs, as shown in fig. 7, where each long lattice represents 1 RB in the frequency domain, only 16 RBs of the 20 RBs can be allocated to 4 terminal devices to transmit the SRS, and there are 4 RBs idle and cannot be used to transmit the SRS.

The method and the device can solve the problems of low resource allocation utilization rate and resource waste when the resources are allocated for SRS transmission.

The embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the embodiments of the present application, the reference signal may be an SRS, and may also be another reference signal, such as a DMRS, and the reference signal is taken as an SRS in the following description of each embodiment, and then the reference signal resource is taken as an SRS resource. That is, the SRS described later can be replaced with the reference signal.

Fig. 8 is a schematic diagram of a transmission method provided in an embodiment of the present application, where the method includes:

s801: the terminal equipment receives SRS configuration information from the network equipment.

S802: the terminal device determines a first frequency domain resource according to the SRS configuration information, wherein the first frequency domain resource is one of a plurality of frequency domain resources, the plurality of frequency domain resources are respectively part of a second frequency domain resource, and bandwidths of at least two frequency domain resources are unequal in the plurality of frequency domain resources.

S803: and the terminal equipment transmits the SRS on the first frequency domain resource, and the network equipment receives the SRS on the first frequency domain resource.

In this embodiment of the application, the second frequency-domain resource may be a continuous frequency-domain resource, for example, in a scenario where the SRS is transmitted in a partial SRS manner, the second frequency-domain resource may refer to a frequency band, and then the multiple frequency-domain resources may refer to multiple subbands existing in the second frequency-domain resource, and the first frequency-domain resource may be a subband indicated by the network device to the terminal device for transmitting the SRS.

The parameters for determining the second frequency domain resource and the first frequency domain resource may be transmitted by the network device to the terminal device through SRS configuration information. As an example, the SRS configuration information may include information of a starting frequency domain position and a bandwidth of the second frequency domain resource, and may further include a partial bandwidth factor P _F And a partial bandwidth frequency domain location factor K _F Wherein, P _F Indicating the number of multiple frequency domain resources, K _F Indicating a location of a first frequency domain resource in a plurality of frequency domain resources, according toP _F And K _F The first frequency-domain resource may be determined in the second frequency-domain resource. The SRS configuration information may be sent from the network device to the terminal device through RRC signaling carrying the SRS configuration information, media Access Control (MAC) Control Element (CE) signaling, and the like.

The number of RBs M included in the second frequency domain resource is equal to 20 _F And K _F 0 and 3, respectively, as an example, P _F The number N representing the plurality of frequency domain resources is 3, M divided by N rounded down to 6, and if the second frequency domain resource is divided into the plurality of frequency domain resources according to each frequency domain resource including M divided by N rounded down RBs, each frequency domain resource includes 6 RBs, 2 RBs may not be divided into the plurality of frequency domain resources, no matter K _F And indicating the first frequency domain resource as which frequency domain resource of the plurality of frequency domain resources, wherein 2 RBs cannot be allocated to the terminal device for use. When multiple terminal devices transmit SRS in the second frequency domain resource in a frequency division multiplexing manner, that is, when multiple terminal devices transmit SRS in different frequency domain resources, 2 RBs cannot be allocated to the terminal devices, which results in a problem of resource waste.

Therefore, in order to fully utilize the frequency domain resources and avoid resource waste, in the embodiment of the present application, there is at least two frequency domain resources in the plurality of frequency domain resources with unequal bandwidths, and the sum of the bandwidths is equal to the bandwidth of the second frequency domain resource. If the number M of RBs included in the second frequency domain resource is equal to 20 and the number of the plurality of frequency domain resources is 3, 2 frequency domain resources may include 6 RBs, another frequency domain resource may include 8 RBs, another frequency domain resource may include 7 RBs, and another frequency domain resource may include 6 RBs. So that 20 RBs included in the second frequency domain resource can each be divided into 3 frequency domain resources.

It should be noted that, in order to avoid that when multiple terminal devices transmit SRS in the frequency division multiplexing manner in the second frequency domain resource (that is, when multiple terminal devices transmit SRS in different frequency domain resources), the frequency domain resources of the SRS transmitted by the multiple terminal devices collide, there is no overlapping RB in the multiple frequency domain resources divided by the second frequency domain resource, that is, the multiple frequency domain resources do not overlap with each other, and when multiple terminal devices transmit SRS in different frequency domain resources divided by the second frequency domain resource, it does not happen that two or more terminal devices transmit SRS in one RB.

In addition, in order to reduce implementation complexity, only two different bandwidths, such as a first bandwidth and a second bandwidth, may exist in the plurality of frequency domain resources, and a bandwidth of any one of the plurality of frequency domain resources is the first bandwidth or the second bandwidth.

As an example: the plurality of frequency domain resources may include X frequency domain resources having a first bandwidth and Y frequency domain resources having a second bandwidth, wherein each frequency domain resource having the first bandwidth includes an integer number of RBs of M divided by N up to L, each frequency domain resource with the second bandwidth comprises RB of which the number is an integral multiple of L obtained by dividing M by N, wherein M is the number of RB included in the second frequency domain resource, X is the remainder of M divided by L and divided by N, Y is the difference value of N and X, L is an integer larger than or equal to 1, and N is the number of the plurality of frequency domain resources.

Including P in SRS configuration information _F (P _F = 3), M is 20, L is 1, for example, P _F The number N of the plurality of frequency domain resources is 3, the remainder of division of M by L and division of N (i.e., M/Lmod N) is 2, division of M by N is rounded up to 7, division of M by N is rounded down to 6, and the second frequency domain resource includes 2 frequency domain resources with a bandwidth of 7 RBs and 1 frequency domain resource with a bandwidth of 6 RBs. Thus, M (20) cannot be replaced by P _F (3) When dividing completely, M RBs are divided into P _F In each frequency domain resource, when SRS is transmitted by using partial SRS mode, P _F Can be allocated to P in frequency domain resources _F When the terminal equipment is used, the terminal equipment can transmit the SRS on the M RBs, and no idle RB which can not be allocated to the terminal equipment for SRS transmission exists, so that resource waste does not exist. Meanwhile, by the allocation mode, the bandwidth difference value between different frequency domain resources can be ensured to be as small as possible, so that the bandwidth of each frequency domain resource is distributed as evenly as possible, the performance of sending the SRS by the terminal equipment is possibly influenced by the bandwidth of the frequency domain resource, and when each frequency domain resource is allocated to different terminal equipment, each frequency domain resource is distributed to different terminal equipmentThe bandwidth of the terminal device is distributed as evenly as possible, so that the SRS transmission performance of each terminal device is balanced and optimal.

In addition, the distribution rule of the distribution of the plurality of frequency domain resources in the second frequency domain resource may be that the number of RBs included in the plurality of frequency domain resources is in an increasing or decreasing trend from the low frequency to the high frequency of the second frequency domain resource; or any two frequency domain resources in the plurality of frequency domain resources, the number of RBs included in the frequency domain resources with the frequency domain positions located at the edge side of the second frequency domain resource is greater than or equal to the number of RBs included in the frequency domain resources with the frequency domain positions located at the center side of the second frequency domain resource, namely the positions of the plurality of frequency domain resources in the second frequency domain resource are positions i, i is 0,1, 8230from the low frequency to the high frequency of the second frequency domain resource, and N-1 and N are the number of the plurality of frequency domain resources; when i is an integer which is smaller than or equal to (N-1) divided by 2 to be rounded down and is larger than 0, the number of RBs included in the frequency domain resource corresponding to the position i-1 is larger than or equal to the number of RBs included in the frequency domain resource corresponding to the position i; and when i is an integer which is greater than (N-1) divided by 2 and is rounded down and less than N-1, the number of RBs included in the frequency domain resource corresponding to the position i +1 is greater than or equal to the number of RBs included in the frequency domain resource corresponding to the position i.

Specifically, the frequency domain resource distribution rule may be pre-configured in the terminal device and the network device through a protocol, or may be indicated to the terminal device by the network device.

Taking the frequency domain resource distribution rule as an example that the number of RBs included in the plurality of frequency domain resources increases from the low frequency to the high frequency of the second frequency domain resource, the distribution of the 3 frequency domain resources in the second frequency domain resource is shown in fig. 9, where each long lattice represents 1 RB in the frequency domain, the 3 bandwidths are respectively frequency domain resources of 6 RBs, 7 RBs, and the frequency domain positions of the second frequency domain resource from the low frequency to the high frequency are respectively position 0, position 1, and position 2.

Including K in SRS configuration information _F If =0, the first frequency domain resource is 6 RBs corresponding to the position 0, the terminal device transmits an SRS on the 6 RBs corresponding to the position 0, and the network device receives the SRS transmitted by the terminal device on the 6 RBs corresponding to the position 0. It should be understood that the RB is the basic unit of frequency domain scheduling, and 5G is used as the basic unitFor example, one RB includes 12 subcarriers. One Resource Element (RE) occupies one symbol in the time domain, one subcarrier in the frequency domain, and the terminal device transmits the SRS on the first frequency domain resource, may occupy all the REs on all the RBs of the first frequency domain resource to transmit the SRS, and may also occupy the equally spaced REs (i.e., equally spaced subcarriers) on all the RBs of the first frequency domain resource to transmit the SRS in a comb transmission manner. As an example: when the terminal device occupies the 6 RBs corresponding to the position 0 to transmit the SRS, it may occupy all the REs on the 6 RBs to transmit the SRS, or transmit in a comb-tooth manner, and occupy the equally-spaced REs on the 6 RBs to transmit the SRS, for example, when the comb-tooth value is 2, the odd subcarriers in the 6 RBs are one comb-tooth, and the even subcarriers in the 6 RBs are one comb-tooth, then it may occupy the odd subcarriers or even subcarriers in the 6 RBs to transmit the SRS.

Of course, it can also be according to P _F The corresponding location priority specifies a distribution of locations of the plurality of frequency domain resources in the second frequency domain resource. Wherein P is _F The corresponding location priority may be pre-configured in the terminal device and the network device through a protocol, or may be indicated to the terminal device by the network device. With P _F For example, =3, the position priority may be 1,2, or 0, and when the number of RBs of the frequency domain resource corresponding to the position 1 in the second frequency domain resource is greater than or equal to the number of RBs of the frequency domain resource corresponding to the position 2, and the number of RBs of the frequency domain resource corresponding to the position 2 is greater than or equal to the number of RBs of the frequency domain resource corresponding to the position 0, the distribution of the 3 frequency domain resources in the second frequency domain resource is as shown in fig. 9.

Still at P _F For example, =3, the position priority may also be 0, 2, or 1, which indicates that the number of RBs of the frequency domain resource corresponding to the position 0 in the second frequency domain resource is greater than or equal to the number of RBs of the frequency domain resource corresponding to the position 2, and the number of RBs of the frequency domain resource corresponding to the position 2 is greater than or equal to the number of RBs of the frequency domain resource corresponding to the position 1, and then the distribution of the 3 frequency domain resources in the second frequency domain resource is as shown in fig. 10. Each long grid represents 1 RB on the frequency domain, 3 bandwidths are respectively the frequency domain resources of 7 RBs, 6 RBs and 7 RBs, and the frequency domain positions from the low frequency to the high frequency in the second frequency domain resource are respectively position 0, position 1 and position 2.

For an RB without SRS transmission, the network device cannot directly obtain Channel State Information (CSI) of the RB from the SRS transmitted by the terminal device on the RB, and the network device may extrapolate or interpolate the CSI of the RB with SRS transmission, that is, estimate the CSI of the RB with SRS transmission, and the closer the RB without SRS transmission is to the RB with SRS transmission, the greater the channel correlation is, and the more accurate the estimated CSI of the RB without SRS transmission is. Referring to fig. 9, when the terminal device transmits the SRS in the RB corresponding to position 0, CSI of the RBs corresponding to positions 1 and 2 needs to be estimated based on the CSI result of the RB corresponding to position 0, and in this case, the interval between the RB with SRS transmission and the RB without SRS transmission is 13 RBs at the maximum. Referring to fig. 10, when the terminal device transmits the SRS in the RB corresponding to position 0 or position 2, the interval between the RB in which the SRS is transmitted and the RB in which the SRS is not transmitted is 12 RBs at the maximum.

From the above, the frequency domain resource distribution rule or P _F When the corresponding position priorities are set differently, when the terminal device transmits the SRS by using one of the second frequency domain resources, the maximum interval between the RB with SRS transmission and the RB without SRS transmission is different, and the closer the interval between the RB without SRS transmission and the RB with SRS transmission is, the greater the channel correlation is, and the more accurate the estimated CSI of the RB without SRS transmission is. Therefore, in some embodiments, in order to obtain better CSI extrapolation performance when the terminal device occupies the frequency domain resource on the edge side of the second frequency domain resource to transmit the SRS, the frequency domain resource distribution rule or P is _F The corresponding position priority may satisfy a condition that any two frequency domain resources of the plurality of frequency domain resources, and the number of RBs included in the frequency domain resource whose frequency domain position is located on the edge side of the second frequency domain resource is greater than or equal to the number of RBs included in the frequency domain resource whose frequency domain position is located on the center side of the second frequency domain resource.

Including P in SRS configuration information _F (P _F = 3), M is 80, L is 4 for example, P _F Representing a number N of the plurality of frequency domain resources as 3, a remainder of M divided by L and divided by N (i.e., M/L mod N) as 2, an integer multiple of M divided by N of 4 up as 28, and M divided by N of 4 downThe integer multiple is 24, and the second frequency domain resource includes 2 frequency domain resources with a bandwidth of 28 RBs and 1 frequency domain resource with a bandwidth of 24 RBs. Suppose P _F If the priority of the position corresponding to 3 is 0, 2, 1 or 2, 0,1, then the distribution of 3 frequency domain resources in the second frequency domain resource is as shown in fig. 11, where each length grid represents 4 RBs in the frequency domain, and the frequency domain resources of 3 bandwidths are respectively 28 RBs, and 24 RBs are respectively located at the frequency domain positions from the low frequency to the high frequency in the second frequency domain resource, which are respectively position 0, position 2, and position 1. If K is included in the SRS configuration information _F If =0, the terminal device transmits SRS on the 28 RBs corresponding to the position 0, and the network device receives SRS transmitted by the terminal device on the 28 RBs corresponding to the position 0. In this case, CSI of RBs corresponding to positions 1 and 2 needs to be estimated from CSI of RBs corresponding to position 0, and in this case, the interval between an RB with SRS transmission and an RB without SRS transmission is up to 51 RBs.

In contrast, as shown in fig. 12, when the condition that any two of the plurality of frequency domain resources are not satisfied and the number of RBs included in the frequency domain resource whose frequency domain position is located on the edge side of the second frequency domain resource is greater than or equal to the number of RBs included in the frequency domain resource whose frequency domain position is located on the center side of the second frequency domain resource is satisfied, the different position priorities are 2, 1, and 0, and the interval between the RB transmitted by the SRS and the RB not transmitted by the SRS is 55 RBs at maximum. According to the mode of fig. 11, the maximum interval is 51 RBs, 4 RBs are reduced, and a better CSI extrapolation performance can be obtained for a terminal device that transmits an SRS to an RB included in the frequency domain resource occupying the position 0.

Then includes P with SRS configuration information _F (P _F = 4), M is 20, L is 4 for example, P _F The number N of the plurality of frequency domain resources is 4, the remainder of dividing M by L and dividing by N is 1, the integer multiple of dividing M by N to up 4 is 8, and the integer multiple of dividing M by N to down 4 is 4, and the second frequency domain resource includes 1 frequency domain resource with bandwidth of 8 RBs and 3 frequency domain resources with bandwidth of 4 RBs. At P _F The priority of the position corresponding to =4 is 0, 3, 1,2, and satisfies any two frequency domain resources in the plurality of frequency domain resources, and the frequency domain resource whose frequency domain position is located at the edge side of the second frequency domain resource includes RB number greater than or equal to that of the frequency domain resourceWhen the frequency domain resource located at the center side of the second frequency domain resource includes the number of RBs, as shown in fig. 13, each slot represents 1 RB in the frequency domain, and when the terminal device transmits an SRS over 8 RBs corresponding to the position 0, the interval between an RB with SRS transmission and an RB without SRS transmission is 11 RBs at the maximum. At P _F If the position priorities corresponding to the frequency domain resources are 1,2, 0, and 3, and the condition that the number of RBs included in the frequency domain resource whose frequency domain position is located at the edge of the second frequency domain resource is greater than or equal to the number of RBs included in the frequency domain resource whose frequency domain position is located at the center of the second frequency domain resource is not satisfied, as shown in fig. 14, when the terminal device transmits an SRS on the 4 RBs corresponding to the position 0, the interval between the RB transmitted with the SRS and the RB not transmitted with the SRS is 15 RBs at maximum, and the 4 RBs are added, and similarly, the terminal device occupies the frequency domain resource corresponding to the position 0 at the edge of the second frequency domain resource to transmit the SRS, but the CSI extrapolation performance is degraded.

In other implementations, the SRS configuration information may further include bandwidth indication information and resource location indication information, the bandwidth indication information may be used to indicate bandwidths of the plurality of frequency domain resources, and the resource location indication information may be used to indicate a location of the first frequency domain resource in the plurality of frequency domain resources. The terminal device may determine the first frequency domain resource according to the bandwidth indication information and the frequency domain location information.

As an example, it is assumed that the second frequency domain resource includes 20 RBs, the bandwidth indication information indicates 3 bandwidths, and the bandwidths are 7 RBs, 6 RBs, and 7 RBs in sequence, and as shown in fig. 10, the second frequency domain resource includes a frequency domain resource with a bandwidth of 7 RBs, a frequency domain resource with a bandwidth of 6 RBs, and a frequency domain resource with a bandwidth of 7 RBs in sequence from a low frequency to a high frequency. The frequency domain positions of the 3 frequency domain resources from the low frequency to the high frequency in the second frequency domain resource are respectively position 0, position 1 and position 2. Assuming that the resource location indication information is 1, the first frequency domain resource is 6 RBs corresponding to the location 1, the terminal device transmits an SRS on the 6 RBs corresponding to the location 1, and the network device receives the SRS transmitted by the terminal device on the 6 RBs corresponding to the location 1. It should be noted that, assuming that the number of the plurality of frequency domain resources is N, the value of the resource location indication information may be any one of {0,1,2, \8230;, N-1 }.

As can be seen from fig. 9 to 14, by using the reference signal transmission method according to the embodiment of the present application, when the number of RBs included in the second frequency domain resource cannot be evenly divided by the number of multiple frequency domain resources divided by the second frequency domain resource, no RB is idle, and the resource utilization rate is improved.

In an optional implementation manner, the transmission method of the reference signal provided in the embodiment of the present application may be applied to a frequency hopping scenario.

As an example, the SRS configuration information may include a frequency domain parameter n _RRC ，n _shift ，B _SRS ，C _SRS ，b _hop And (4) parameters of equal frequency domain. After receiving the SRS configuration information from the network device, the terminal device may determine the frequency domain parameter n _RRC ，n _shift ，B _SRS ，C _SRS ，b _hop Determining the SRS frequency domain starting position and the SRS overall bandwidth m _SRS,b′ SRS frequency hopping bandwidth m _SRS,b And so on. And can determine the RB corresponding to each frequency hopping of the SRS according to the frequency hopping rule (or frequency hopping pattern) followed by the frequency hopping manner. With the overall SRS bandwidth of 32 RBs and the SRS hopping bandwidth of 8 RBs, the hopping manner follows the rules of a tree structure, and without considering the starting position of the SRS frequency domain, the SRS hopping pattern is as shown in fig. 2B, where each square represents 2 RBs in the frequency domain and 1 symbol in the time domain.

In some implementations, the second frequency domain resource may refer to an RB to which the SRS hops (i.e., m determined by the frequency domain parameters mentioned above) _SRS,b One RB). For example, when the overall SRS bandwidth and SRS hopping bandwidth are equal, i.e., m _SRS,b′ ＝m _SRS,b The terminal device transmits the SRS in a non-frequency hopping manner, and at this time, only one frequency hopping subband exists, and the frequency hopping subband may be used as the second frequency domain resource to determine the first frequency domain resource in the second frequency domain resource. For example: at b _hop ＝0，C _SRS ＝0，B _SRS When =2, referring to table 1, it can be seen that the SRS overall bandwidth and the SRS hopping bandwidth are equal to each other and are 4 RBs, as shown in fig. 15A, each square block represents 2 RBs in the frequency domain and 1 symbol in the time domain, and this is doneWhen the terminal device transmits the SRS in a non-frequency hopping manner, the terminal device may determine the first frequency domain resource from the second frequency domain resource by using the 4 RBs determined by the frequency domain parameters (e.g., 4 RBs indicated by the letter a in fig. 15A) as the second frequency domain resource.

When the overall SRS bandwidth and the SRS frequency hopping bandwidth are not equal, the terminal equipment transmits the SRS in a frequency hopping mode, and a plurality of frequency hopping sub-bands exist at the moment, wherein each frequency hopping sub-band comprises m _SRS,b And each RB, in this case, may serve as a second frequency domain resource, and may determine the first frequency domain resource. That is, the reference signal transmission method provided by the embodiment of the present application is applicable to each frequency hopping sub-band. For example: at b _hop ＝0，C _SRS ＝9，B _SRS If =2, referring to table 1, it can be seen that the overall SRS bandwidth is 32 RBs, and the SRS hopping bandwidth is 8 RBs, as shown in fig. 15B, where each square represents 2 RBs in the frequency domain and 1 symbol in the time domain, at this time, the terminal device transmits the SRS in a frequency hopping manner, there are 4 SRS hopping sub-bands, and each SRS hopping sub-band (for example, 8 RBs identified by any one of letters a to D in fig. 15B) can be used as the second frequency domain resource, and the first frequency domain resource can be determined.

In some implementations, the SRS may be repeatedly transmitted over multiple symbols, where repeatedly transmitting refers to: the SRS is transmitted in a plurality of consecutive symbols, the RBs occupied by the SRS in each symbol are the same, and the SRS sequences used in the plurality of symbols may be the same or different. In this case, the second frequency resource may be an RB corresponding to SRS hopping on any one symbol. For example, the number of SRS repetitions is 2 and the overall SRS bandwidth and SRS hopping bandwidth are equal, i.e., m _SRS,b′ ＝m _SRS,b The terminal equipment sends the SRS in a non-frequency hopping and repeating mode, the SRS occupies two continuous symbols, the number of RBs corresponding to SRS frequency hopping on each symbol is the same as the frequency domain position, the RBs corresponding to SRS frequency hopping on each symbol can be used as second frequency domain resources, and the first frequency domain resources are determined in the second frequency domain resources. For example: at a repetition number of 2,b _hop ＝0，C _SRS ＝0，B _SRS In case of =2, it can be seen from table 1 that the SRS total bandwidth and the SRS hopping bandwidth are equal to each other and are 4 RBs, as shown in fig. 16A, where each square represents 2 RBs in the frequency domain and 1 symbol in the time domain, when the terminal device transmits the SRS in a non-frequency hopping manner, and transmits the SRS in two consecutive symbols, 4 RBs corresponding to SRS frequency hopping (e.g., 4 RBs indicated by alphanumeric combination A1 or A2 in fig. 16A) in any one of the two consecutive symbols can be used as the second frequency resource, and the first frequency resource is determined in the second frequency resource.

When the SRS whole bandwidth and the SRS frequency hopping bandwidth are not equal and are repeatedly transmitted, the terminal equipment transmits the SRS in a frequency hopping and repeating mode, at the moment, a plurality of frequency hopping sub-bands exist, each frequency hopping sub-band occupies a plurality of symbols, and each symbol comprises m with the same frequency domain position _SRS,b RB, when each frequency hopping sub-band corresponds to m on any symbol _SRS,b Each RB may be considered as a second frequency domain resource and may determine a first frequency domain resource. That is to say, the reference signal transmission method provided by the embodiment of the present application is applicable to each frequency hopping sub-band. For example: at a repetition number of 2,b _hop ＝0，C _SRS ＝9，B _SRS When =2, referring to table 1, it can be seen that the overall SRS bandwidth is 32 RBs, and the SRS hopping bandwidth is 8 RBs, as shown in fig. 16B, where each square represents 2 RBs in the frequency domain and 1 symbol in the time domain, at this time, the terminal device transmits the SRS in a frequency hopping manner, there are 4 SRS hopping sub-bands, each sub-band occupies two consecutive symbols, each symbol includes 8 RBs with the same frequency domain position, at this time, each sub-band can use 8 RBs corresponding to any one symbol (e.g., 8 RBs identified by any one alphanumeric combination in alphanumeric combinations A1-D2 in fig. 16B) as the second frequency domain resource, and can determine the first frequency domain resource.

In addition, it should be understood that, in the embodiment of the present application, a specific form of the SRS configuration information is not limited, and the configuration information may indicate a size and a position of the first frequency domain resource.

In addition, when the second frequency domain resource includes multiple frequency domain resources, the network device may schedule other terminal devices to use other frequency domain resources, or may make other frequency domain resources idle, that is, not schedule any terminal device to use, except that the terminal device occupies the first frequency domain resource for transmitting the SRS.

The above-mentioned method improves the determination method of frequency domain resources when transmitting SRS using partial SRS mainly from the viewpoint of improving the utilization rate of frequency domain resources. In some implementations, the idle RB may also be used to suppress out-of-band interference to achieve better transmission performance, which is described below in conjunction with specific implementations.

Fig. 17 is a schematic diagram of another reference signal transmission method according to an embodiment of the present application, where the method includes:

s1701: the terminal equipment receives SRS configuration information from the network equipment.

S1702: the terminal device determines a first frequency domain resource according to the SRS configuration information, wherein the first frequency domain resource is one of a plurality of frequency domain resources, the plurality of frequency domain resources are respectively a part of a second frequency domain resource, and the second frequency domain resource sequentially comprises a first idle frequency domain resource, the plurality of frequency domain resources and a second idle frequency domain resource from low frequency to high frequency.

S1703: and the terminal equipment transmits the SRS on the first frequency domain resource, and the network equipment receives the SRS on the first frequency domain resource.

In this embodiment of the present application, the second frequency-domain resource is also a continuous segment of frequency-domain resource, for example, in a scenario where the SRS is transmitted in a partial SRS manner, the second frequency-domain resource may refer to a frequency band, the multiple frequency-domain resources may refer to multiple subbands existing in the second frequency-domain resource, and the first frequency-domain resource may be a subband indicated to the terminal device by the network device for transmitting the SRS. Specifically, the implementation of determining the second frequency domain resource may refer to the method shown in fig. 8, and details about the implementation of determining the second frequency domain resource are not repeated.

For the first frequency domain resource for transmitting the SRS, the terminal device may determine according to a parameter in the SRS configuration information from the network device. Wherein the SRS configuration information may include P _F And K _F ，P _F Can indicateNumber of multiple frequency domain resources, K _F A position of the first frequency-domain resource in the plurality of frequency-domain resources may be indicated. The terminal device can be according to P _F And K _F The first frequency domain resource is determined among the second frequency domain resources.

The number of RBs M included in the second frequency domain resource is equal to 20 _F And K _F 0 and 3 respectively as an example, P _F The number N representing the plurality of frequency domain resources is 3, M divided by N rounded down to 6, and if the second frequency domain resource is divided into the plurality of frequency domain resources according to each frequency domain resource including M divided by N rounded down RBs, each frequency domain resource includes 6 RBs, 2 RBs may not be divided into the plurality of frequency domain resources, no matter K _F When the first frequency domain resource is indicated to be which frequency domain resource of the multiple frequency domain resources, 2 RBs can not be allocated to the terminal device for use, and when the multiple terminal devices transmit the SRS in the frequency division multiplexing mode in the second frequency domain resource (that is, when the multiple terminal devices transmit the SRS in different frequency domain resources), 2 RBs can also not be allocated to the terminal device for use, which causes a problem of resource waste.

Therefore, in order to fully utilize the frequency domain resources and avoid resource waste, in the embodiment of the present application, while the second frequency domain resource is divided into a plurality of frequency domain resources, a first idle frequency domain resource and a second idle frequency domain resource may also be divided into a low frequency side and a high frequency side of the second frequency domain resource, for example, an RB that cannot be allocated to the terminal device for use is divided into the first idle frequency domain resource and the second idle frequency domain resource, so as to reduce interference that out-of-band leakage generated by sending an SRS by the terminal device causes to other terminal devices to transmit data and the like on adjacent frequency domain resources of the second frequency domain resource, or reduce interference to other communication systems. It should be understood that, the first idle frequency domain resource and the second idle frequency domain resource refer to frequency domain resources (such as RBs) that the network device cannot allocate to the terminal device for SRS transmission, or refer to frequency domain resources that the network device does not allocate to the terminal device for SRS transmission.

It should be noted that, in order to avoid that the multiple terminal devices send the SRS in the frequency division multiplexing manner when the multiple terminal devices send the SRS in the second frequency domain resource (that is, the multiple terminal devices send the SRS in different frequency domain resources), the frequency domain resources where the multiple terminal devices send the SRS collide, the first idle frequency domain resource, the multiple frequency domain resources, and the second idle frequency domain resource that are divided by the second frequency domain resource have no overlapping RBs, that is, the first idle frequency domain resource, the multiple frequency domain resources, and the second idle frequency domain resource do not overlap each other, and the sum of the bandwidths is equal to the bandwidth of the second frequency domain resource.

As an example: each of the plurality of frequency domain resources may include RB that is an integer multiple of L divided by M, where M is the number of RBs included in the second frequency domain resource, L is an integer greater than or equal to 1, and N is the number of the plurality of frequency domain resources; when O can be divided by 2, the first idle frequency domain resource and the second idle frequency domain resource respectively comprise RB of O divided by 2; when O is not divisible by 2, the first idle frequency domain resource includes O divided by 2 rounded up number of RBs, and the second idle frequency domain resource includes O divided by 2 rounded down number of RBs. Where O is equal to the value of M divided by L and the remainder divided by N multiplied by L, i.e., the number of remaining RBs of the second frequency domain resource other than the RBs occupied by the plurality of frequency domain resources. Therefore, the low-frequency edge side and the high-frequency edge side of the second frequency domain resource have more idle RBs to inhibit the interference brought by the out-of-band leakage to other terminal equipment for transmitting data and the like on the adjacent frequency domain resource of the second frequency domain resource.

Including P in SRS configuration information _F (P _F = 3), M is 20, L is 1, for example, P _F Representing that the number of the plurality of frequency domain resources N is 3, the remainder of M divided by L and divided by N (i.e., M/L mod N) is 2, M divided by N is rounded down to 6, and the number of remaining RBs other than the RBs occupied by the plurality of frequency domain resources in the second frequency domain resource is 2, then O is 2 can be divisible by 2. Then, as shown in fig. 18A, each long lattice represents 1 RB in the frequency domain, and the first free frequency domain resource with a bandwidth of 1 RB,3 frequency domain resources with a bandwidth of 6 RBs, and the second free frequency domain resource with a bandwidth of 1 RB are sequentially arranged in the second frequency domain resource from the low frequency to the high frequency. Wherein the frequency domain resources with the bandwidth of 3 RBs are respectively located at the position 0, the position 1 and the position 2 from the low frequency to the high frequency in the second frequency domain resource, such asK included in the fruit SRS configuration information _F If =0, the first frequency domain resource is 6 RBs corresponding to position 0, the terminal device transmits an SRS on the 6 RBs corresponding to position 0, and the network device receives the SRS transmitted by the terminal device on the 6 RBs corresponding to position 0.

Compared with FIG. 6, although M is 20, P _F All 3 RBs are idle, and there are 2 RBs, but there are 1 idle RB on each of the low frequency edge and the high frequency edge of the second frequency domain resource in fig. 18A, which can simultaneously reduce interference caused by out-of-band leakage generated by the terminal device sending the SRS to other terminal devices transmitting data and the like on adjacent frequency domain resources of the second frequency domain resource, or reduce interference to other communication systems.

Including P in SRS configuration information _F (P _F = 5), M is 28, L is 1 for example, P _F Representing that the number of the plurality of frequency domain resources N is 5, the remainder of M divided by L and divided by N (i.e., M/L mod N) is 3, M divided by N is rounded down to 5, the number of remaining RBs other than the RBs occupied by the plurality of frequency domain resources in the second frequency domain resource is 2, then O is 3 and cannot be rounded up by 2, O is divided by 2 and is rounded up to 2, and is rounded down to 1. Then, as shown in fig. 18B, each long lattice represents 1 RB in the frequency domain, and the first idle frequency domain resource with a bandwidth of 2 RBs, the 5 frequency domain resources with a bandwidth of 5 RBs, and the second idle frequency domain resource with a bandwidth of 1 RB are sequentially arranged from the low frequency to the high frequency in the second frequency domain resource. Wherein, the frequency domain positions of the 5 frequency domain resources with the bandwidth of 5 RBs from the low frequency to the high frequency in the second frequency domain resource are respectively position 0, position 1, position 2, position 3 and position 4, if K is included in the SRS configuration information _F If =0, the first frequency domain resource is 5 RBs corresponding to position 0, the terminal device transmits an SRS on the 5 RBs corresponding to position 0, and the network device receives the SRS transmitted by the terminal device on the 5 RBs corresponding to position 0.

The above is exemplified by that when O cannot be divided by 2, the first idle frequency domain resource includes RB whose number is divided by 2 and rounded up, and the second idle frequency domain resource includes RB whose number is divided by 2 and rounded down, and the number of RBs included in the first idle frequency domain resource and the second idle frequency domain resource is limited. In some implementations, it may also be that when O cannot be evenly divided by 2, the first idle frequency-domain resource includes O divided by 2 rounded down number of RBs, and the second idle frequency-domain resource includes O divided by 2 rounded up number of RBs.

In addition, as shown in fig. 18A or fig. 18B, while the network device schedules one terminal device to transmit the SRS on the frequency domain resource (i.e., RB) corresponding to position 0, the network device may also schedule other terminal devices to transmit the SRS on the frequency domain resources corresponding to position 1 and/or position 2, and multiple terminal devices transmit the SRS by multiplexing the second frequency domain resource in a frequency division multiplexing manner, that is, multiple terminal devices configure the same P _F Value, but configured differently, K _F . That is, the terminal device may be according to K _F The value of (3), the SRS is transmitted on the frequency domain resource corresponding to the position 0, or the position 1, or the position 2, but goes through all K _F Nor will the SRS be transmitted on the first and second idle frequency domain resources.

Still alternatively, P is included in SRS configuration information _F (P _F = 3) and K _F (K _F = 0), M is 80, L is 4 for example, P _F The number N representing the plurality of frequency domain resources is 3, m divided by an integer multiple of 4 down N is 24, o is 8 and can be divided by 2. Then, as shown in fig. 19, where each long lattice represents 4 RBs in the frequency domain, the terminal device determines that there are, in the second frequency domain resource, a first idle frequency domain resource with a bandwidth of 4 RBs, 3 frequency domain resources with a bandwidth of 24 RBs, and a second idle frequency domain resource with a bandwidth of 4 RBs in order from the low frequency to the high frequency. Wherein the frequency domain positions of the 3 frequency domain resources with the bandwidth of 24 RBs from the low frequency to the high frequency in the second frequency domain resource are respectively position 0, position 1 and position 2, K _F If =0, the first frequency domain resource is 24 RBs corresponding to the position 0, the terminal device transmits an SRS on the 24 RBs corresponding to the position 0, and the network device receives the SRS transmitted by the terminal device on the 24 RBs corresponding to the position 0.

For the frequency domain resources corresponding to the position 1 and/or the position 2, the network device may also schedule other terminal devices to transmit SRS on the frequency domain resources corresponding to the position 1 and/or the position 2, that is, configure K for the terminal devices _F 1 or 2, but traverse all K _F Nor will the SRS be transmitted on the first and second idle frequency domain resources.

In other implementations, the SRS configuration information may further include bandwidth indication information and resource location indication information, the bandwidth indication information may be used to indicate bandwidths of the first free frequency domain resource, the plurality of frequency domain resources, and the second free frequency domain resource, and the resource location indication information may be used to indicate a location of the first frequency domain resource in the plurality of frequency domain resources. The terminal device may sequentially determine the first idle frequency domain resource, the plurality of frequency domain resources, and the second idle frequency domain resource from the low frequency to the high frequency of the second frequency domain resource according to the plurality of bandwidths indicated by the bandwidth indication information, and determine the first frequency domain resource among the plurality of frequency domain resources according to the resource position indication information.

As an example, assuming that the number of RBs included in the second frequency domain resource is 20, the bandwidth indication information indicates 5 bandwidths, which are 1 RB, 6 RBs, and 1 RB in sequence, as shown in fig. 18A, the terminal device determines, from a low frequency to a high frequency, a first idle frequency domain resource with a bandwidth of 1 RB,3 frequency domain resources with a bandwidth of 6 RBs, and a second idle frequency domain resource with a bandwidth of 1 RB in sequence. And the frequency domain positions of the 3 frequency domain resources with the bandwidth of 6 RBs from the low frequency to the high frequency in the second frequency domain resource are respectively position 0, position 1 and position 2. Assuming that the resource location indication information is 1, the first frequency domain resource is 6 RBs corresponding to the location 1, the terminal device transmits an SRS on the 6 RBs corresponding to the location 1, and the network device receives the SRS transmitted by the terminal device on the 6 RBs corresponding to the location 1. It should be noted that, assuming that the number of the plurality of frequency domain resources is N, the value of the resource location indication information may be any one of {0,1,2, \8230;, N-1 }.

In addition, it should be understood that, in the present application, there may also be an unequal bandwidth of at least two frequency domain resources in the plurality of frequency domain resources. As an example, assuming that the second frequency domain resource includes 80 RBs, the bandwidth indication information indicates 5 bandwidths, and the indicated 5 bandwidths may be sequentially 2 RBs, 24 RBs, 28 RBs, 24 RBs, and 2 RBs, the terminal device determines, from a low frequency to a high frequency, a first idle frequency domain resource with a bandwidth of 2 RBs, a frequency domain resource with a bandwidth of 24 RBs, a frequency domain resource with a bandwidth of 28 RBs, a frequency domain resource with a bandwidth of 24 RBs, and a second idle frequency domain resource with a bandwidth of 2 RBs in the second frequency domain resource. The frequency domain positions of the 3 frequency domain resources from the low frequency to the high frequency in the second frequency domain resource are respectively position 0, position 1 and position 2. Assuming that the resource location indication information is 1, the first frequency domain resource is 24 RBs corresponding to the location 1, the terminal device transmits an SRS over the 24 RBs corresponding to the location 1, and the network device receives the SRS transmitted by the terminal device over the 24 RBs corresponding to the location 1.

As can be seen from fig. 18A, 18B and 19, by using the reference signal transmission method according to the embodiment of the present application, when there is an idle RB, the idle RB may be located at the low-frequency edge side and the high-frequency edge side of the second frequency domain resource, so as to reduce interference caused by out-of-band leakage generated by sending SRS by the terminal device to other terminal devices transmitting data on the adjacent frequency domain resource of the second frequency domain resource, or reduce interference to other communication systems, and also reduce interference caused by sending data on the adjacent frequency domain resource of the second frequency domain resource by other terminal devices or sending SRS by other communication systems to the terminal device, thereby improving transmission performance.

It is understood that, in order to implement the functions in the foregoing embodiments, the network device and the terminal device include corresponding hardware structures and/or software modules for performing the respective functions. Those of skill in the art will readily appreciate that the various illustrative elements and method steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software driven hardware depends on the particular application scenario and design constraints imposed on the solution.

Fig. 20 and 21 are schematic structural diagrams of a possible communication device provided in an embodiment of the present application. The communication devices may also be referred to as reference signal transmission devices, and these communication devices may be used to implement the functions of the terminal device or the network device in the foregoing method embodiments, so that the beneficial effects of the foregoing method embodiments can also be achieved. In the embodiment of the present application, the communication apparatus may be one of the terminal devices 120a to 120j shown in fig. 1, may also be the

network device

110a or 110b shown in fig. 1, and may also be a module (e.g., a chip) applied to the terminal device or the network device.

As shown in fig. 20, the communications device 2000 includes a processing unit 2010 and a transceiver unit 2020. The communication device 2000 is configured to implement the functions of the terminal device or the network device in the method embodiments shown in fig. 8 or fig. 17.

When the communication apparatus 2000 is used to implement the functions of the terminal device in the method embodiment shown in fig. 8:

a transceiver unit 2020, configured to receive reference signal configuration information from a network device;

a processing unit 2010, configured to determine, according to the reference signal configuration information, a first frequency domain resource, where the first frequency domain resource is one of multiple frequency domain resources, the multiple frequency domain resources are respectively part of a second frequency domain resource, and bandwidths of at least two frequency domain resources in the multiple frequency domain resources are not equal, where the second frequency domain resource is a continuous segment of frequency domain resources;

the transceiver 2020 is further configured to transmit a reference signal on the first frequency domain resource.

In one possible design, the L is 1 or 4.

When the communication apparatus 2000 is used to implement the functions of the terminal device in the method embodiment shown in fig. 17:

a processing unit 2010, configured to determine, according to the reference signal configuration information, a first frequency domain resource, where the first frequency domain resource is one of multiple frequency domain resources, the multiple frequency domain resources are part of a second frequency domain resource, and the second frequency domain resource includes, in order from a low frequency to a high frequency, a first idle frequency domain resource, the multiple frequency domain resources, and a second idle frequency domain resource, where the second frequency domain resource is a continuous segment of frequency domain resource;

the transceiver unit 2020 is further configured to transmit a reference signal on the first frequency-domain resource.

In one possible design, the reference signal configuration information includes a fractional bandwidth factor P _F And a partial bandwidth frequency domain location factor K _F Said P is _F Indicating the number of the plurality of frequency domain resources, the K _F Indicating a position of the first frequency-domain resource in the plurality of frequency-domain resources.

In one possible design, the L is 1 or 4.

When the communication apparatus 2000 is used to implement the functions of the network device in the method embodiment shown in fig. 8:

a processing unit 2010, configured to determine, according to reference signal configuration information sent to a terminal device, a first frequency domain resource, where the first frequency domain resource is one of multiple frequency domain resources, the multiple frequency domain resources are respectively part of a second frequency domain resource, and bandwidths of at least two frequency domain resources in the multiple frequency domain resources are not equal, where the second frequency domain resource is a continuous segment of frequency domain resources;

a transceiver unit 2020, configured to receive a reference signal on the first frequency-domain resource.

In one possible design, the plurality of frequency domain resources includes: the frequency domain resources with the bandwidth of X are frequency domain resources with a first bandwidth and frequency domain resources with the bandwidth of Y are frequency domain resources with a second bandwidth, wherein each frequency domain resource with the bandwidth of the first bandwidth comprises RB of which the number is an integral multiple of L obtained by dividing M by N upwards, each frequency domain resource with the bandwidth of the second bandwidth comprises RB of which the number is an integral multiple of L obtained by dividing M by N downwards, M is the number of RB included by the second frequency domain resource, X is the remainder of the M by dividing L by N, Y is the difference value of N and X, L is an integer larger than or equal to 1, and N is the number of the plurality of frequency domain resources.

In one possible design, the L is 1 or 4.

In one possible design, the position of the plurality of frequency domain resources in the second frequency domain resource is position i, i is 0,1, \8230, from the low frequency to the high frequency of the second frequency domain resource, N-1, N is the number of the plurality of frequency domain resources; when i is an integer which is smaller than or equal to (N-1) divided by 2 and is rounded downwards and is larger than 0, the number of RBs included in the frequency domain resource corresponding to the position i-1 is larger than or equal to the number of RBs included in the frequency domain resource corresponding to the position i; and when i is an integer which is greater than (N-1) divided by 2 and is rounded down and less than N-1, the number of RBs included in the frequency domain resource corresponding to the position i +1 is greater than or equal to the number of RBs included in the frequency domain resource corresponding to the position i.

When the communication apparatus 2000 is used to implement the functions of the network device in the method embodiment shown in fig. 17:

a processing unit 2010, configured to determine, according to reference signal configuration information sent to a terminal device, a first frequency domain resource, where the first frequency domain resource is one of multiple frequency domain resources, where the multiple frequency domain resources are respectively part of a second frequency domain resource, and the second frequency domain resource sequentially includes, from a low frequency to a high frequency, a first idle frequency domain resource, the multiple frequency domain resources, and a second idle frequency domain resource, where the second frequency domain resource is a continuous segment of frequency domain resource;

a transceiver unit 2020 configured to receive a reference signal on the first frequency domain resource.

In one possible design, the reference signal configuration information includes a fractional bandwidth factor P _F And a partial bandwidth frequency domain location factor K _F Said P is _F Indicating the number of the plurality of frequency domain resources, the K _F Indicating a location of the first frequency-domain resource in the plurality of frequency-domain resources.

In one possible design, each of the plurality of frequency domain resources includes resource blocks, RBs, of integer multiples of M divided by N, where M is the number of RBs included in the second frequency domain resource, L is an integer greater than or equal to 1, and N is the number of the plurality of frequency domain resources; when O can be divided by 2, the first and second idle frequency domain resources each include O divided by 2 number of RBs, the O is equal to M divided by L and the remainder divided by N multiplied by the value of L; or, when O is not divisible by 2, the first idle frequency domain resource includes O divided by 2 rounded up number of RBs, the second idle frequency domain resource includes O divided by 2 rounded down number of RBs; or, when O is not divisible by 2, the first idle frequency domain resource includes O divided by 2 rounded down number of RBs, and the second idle frequency domain resource includes O divided by 2 rounded up number of RBs.

In one possible design, the L is 1 or 4.

More detailed descriptions about the processing unit 2010 and the transceiver 2020 can be directly obtained by referring to the related descriptions in the method embodiment shown in fig. 8 or fig. 17, and are not repeated here.

As shown in fig. 21, the communication device 2100 includes a processor 2110 and an interface circuit 2120. The processor 2110 and the interface circuit 2120 are coupled to each other. It is understood that the interface circuit 2120 may be a transceiver or an input-output interface. Optionally, the communication device 2100 may further comprise a memory 2130 for storing instructions executed by the processor 2110 or for storing input data required by the processor 2110 to execute the instructions or for storing data generated by the processor 2110 after executing the instructions.

When the communications device 2100 is configured to implement the method of fig. 8 or 17, the processor 2110 is configured to implement the functions of the processing unit 2010 described above, and the interface circuit 2120 is configured to implement the functions of the transceiver 2020 described above.

When the communication device is a chip applied to a terminal device, the terminal device chip implements the functions of the terminal device in the method embodiment. The terminal device chip receives information from other modules (such as a radio frequency module or an antenna) in the terminal device, and the information is sent to the terminal device by the network device; or, the terminal device chip sends information to other modules (such as a radio frequency module or an antenna) in the terminal device, where the information is sent by the terminal device to the network device.

When the communication device is a module applied to a network device, the network device module implements the functions of the network device in the above method embodiments. The network equipment module receives information from other modules (such as a radio frequency module or an antenna) in the network equipment, and the information is sent to the network equipment by the terminal equipment; alternatively, the network device module sends information to other modules (such as a radio frequency module or an antenna) in the network device, where the information is sent by the network device to the terminal device. The network device module may be a baseband chip of a network device, or may be a DU or other module, where the DU may be a DU under an open radio access network (O-RAN) architecture.

It is understood that the processor in the embodiments of the present application may be a Central Processing Unit (CPU), other general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. The general purpose processor may be a microprocessor, but may be any conventional processor.

The method steps in the embodiments of the present application may be implemented by hardware, or may be implemented by software instructions executed by a processor. The software instructions may be comprised of corresponding software modules that may be stored in random access memory, flash memory, read only memory, programmable read only memory, erasable programmable read only memory, electrically erasable programmable read only memory, registers, a hard disk, a removable hard disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may reside in a network device or a terminal device. Of course, the processor and the storage medium may reside as discrete components in a network device or a terminal device.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part 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 the present application are performed in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, a network appliance, a user device, or other programmable apparatus. The computer program or instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer program or instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire or wirelessly. The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that integrates one or more available media. The usable medium may be a magnetic medium, such as a floppy disk, hard disk, magnetic tape; optical media such as digital video disks; but also semiconductor media such as solid state disks. The computer readable storage medium may be volatile or nonvolatile storage medium, or may include both volatile and nonvolatile types of storage media.

In the embodiments of the present application, unless otherwise specified or conflicting with respect to logic, the terms and/or descriptions in different embodiments have consistency and may be mutually cited, and technical features in different embodiments may be combined to form a new embodiment according to their inherent logic relationship.

In addition, it should be understood that in the embodiments of the present application, the word "exemplary" is used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, the word using examples is intended to present concepts in a concrete fashion.

In the embodiments of the present application, information (information), signal (signal), message (message), and channel (channel) may be mixed, and it should be noted that the meanings to be expressed are consistent when the differences are not emphasized. "of", "corresponding", and "corresponding" may sometimes be used in combination, it being noted that the intended meaning is consistent when no distinction is made.

In this application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated object, indicating that there may be three relationships, for example, a and/or B, which may indicate: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. In the description of the text of the present application, the character "/" generally indicates that the former and latter associated objects are in an "or" relationship; in the formula of the present application, the character "/" indicates that the preceding and following associated objects are in a "division" relationship. "including at least one of a, B, and C" may mean: comprises A; comprises B; comprises C; comprises A and B; comprises A and C; comprises B and C; including A, B and C.

It is to be understood that the various numerical references referred to in the embodiments of the present application are merely for convenience of description and distinction and are not intended to limit the scope of the embodiments of the present application. The sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of the processes should be determined by their functions and inherent logic.

Claims

1. A method for transmitting a reference signal, comprising:

receiving reference signal configuration information from network equipment;

determining a first frequency domain resource according to the reference signal configuration information, wherein the first frequency domain resource is one of a plurality of frequency domain resources, the plurality of frequency domain resources are respectively part of a second frequency domain resource, the bandwidths of at least two frequency domain resources are unequal in the plurality of frequency domain resources, and the second frequency domain resource is a continuous section of frequency domain resource;

transmitting a reference signal on the first frequency domain resource.

2. The method of claim 1, wherein the plurality of frequency domain resources do not overlap with each other and a sum of bandwidths is equal to a bandwidth of the second frequency domain resource.

3. The method according to claim 1 or 2, wherein the reference signal configuration information comprises a partial bandwidth factor P _F And a partial bandwidth frequency domain location factor K _F Said P is _F Indicating the number of the plurality of frequency domain resources, K _F Indicating a location of the first frequency-domain resource in the plurality of frequency-domain resources.

4. The method of any one of claims 1-3, wherein a bandwidth of any one of the plurality of frequency domain resources is a first bandwidth or a second bandwidth, the first bandwidth and the second bandwidth being unequal.

5. The method of any of claims 1-4, wherein the plurality of frequency domain resources comprises:

the frequency domain resources with the bandwidth of X are frequency domain resources with a first bandwidth and the frequency domain resources with the bandwidth of Y are frequency domain resources with a second bandwidth, wherein each frequency domain resource with the bandwidth of the first bandwidth comprises RB of which the number is an integral multiple of L obtained by dividing M by N upwards, each frequency domain resource with the bandwidth of the second bandwidth comprises RB of which the number is an integral multiple of L obtained by dividing M by N downwards, M is the number of RB included by the second frequency domain resource, X is the remainder of M by dividing L by N, Y is the difference between N and X, L is an integer larger than or equal to 1, and N is the number of the plurality of frequency domain resources.

6. The method of claim 5, wherein L is 1 or 4.

7. The method of any one of claims 1-6, wherein the plurality of frequency domain resources are located at a position i in the second frequency domain resource, i being 0,1, \ 8230, in order from the low frequency to the high frequency of the second frequency domain resource, N-1, N being a number of the plurality of frequency domain resources; wherein the content of the first and second substances,

when i is an integer which is less than or equal to (N-1) divided by 2 to be rounded down and is greater than 0, the number of RBs included in the frequency domain resource corresponding to the position i-1 is greater than or equal to the number of RBs included in the frequency domain resource corresponding to the position i;

and when i is an integer which is larger than (N-1) divided by 2 and is rounded down and smaller than N-1, the number of RBs included in the frequency domain resource corresponding to the position i +1 is larger than or equal to the number of RBs included in the frequency domain resource corresponding to the position i.

8. A method for transmitting a reference signal, comprising:

determining a first frequency domain resource according to reference signal configuration information sent to a terminal device, where the first frequency domain resource is one of multiple frequency domain resources, the multiple frequency domain resources are part of a second frequency domain resource, and bandwidths of at least two frequency domain resources in the multiple frequency domain resources are unequal, and the second frequency domain resource is a continuous segment of frequency domain resource;

receiving a reference signal on the first frequency domain resource.

9. The method of claim 8, wherein the plurality of frequency domain resources do not overlap with each other and a sum of bandwidths is equal to a bandwidth of the second frequency domain resource.

10. The method according to claim 8 or 9, wherein the reference signal configuration information comprises a partial bandwidth factor P _F And a partial bandwidth frequency domain location factor K _F Said P is _F Indicating the number of the plurality of frequency domain resources, K _F Indicating a location of the first frequency-domain resource in the plurality of frequency-domain resources.

11. The method of any one of claims 8-10, wherein a bandwidth of any one of the plurality of frequency domain resources is a first bandwidth or a second bandwidth, the first bandwidth and the second bandwidth being unequal.

12. The method of any one of claims 8-11, wherein the plurality of frequency domain resources comprises:

13. The method of claim 12, wherein L is 1 or 4.

14. The method of any one of claims 8-13, wherein the plurality of frequency domain resources are located at a position i in the second frequency domain resource, i being 0,1, \8230inorder from a low frequency to a high frequency of the second frequency domain resource, N-1, N being a number of the plurality of frequency domain resources; wherein, the first and the second end of the pipe are connected with each other,

when i is an integer which is less than or equal to (N-1) divided by 2 and is rounded downwards and is greater than 0, the number of RBs included in the frequency domain resource corresponding to the position i-1 is greater than or equal to the number of RBs included in the frequency domain resource corresponding to the position i;

15. A transmission device of reference signals is characterized by comprising a transceiving unit and a processing unit;

the receiving and sending unit is used for receiving reference signal configuration information from network equipment;

the processing unit is configured to determine a first frequency domain resource according to the reference signal configuration information, where the first frequency domain resource is one of multiple frequency domain resources, the multiple frequency domain resources are part of second frequency domain resources, and bandwidths of at least two frequency domain resources are unequal in the multiple frequency domain resources, and the second frequency domain resource is a continuous segment of frequency domain resources;

the transceiver unit is further configured to transmit a reference signal on the first frequency domain resource.

16. The apparatus of claim 15, wherein the plurality of frequency domain resources do not overlap with each other and a sum of bandwidths is equal to a bandwidth of the second frequency domain resource.

17. The apparatus of claim 15 or 16, wherein the reference signal configuration information comprises a partial bandwidth factor P _F And a partial bandwidth frequency domain location factor K _F Said P is _F Indicating the number of the plurality of frequency domain resources, K _F Indicating a location of the first frequency-domain resource in the plurality of frequency-domain resources.

18. The apparatus of any one of claims 15-17, wherein a bandwidth of any one of the plurality of frequency domain resources is a first bandwidth or a second bandwidth, the first bandwidth and the second bandwidth being unequal.

19. The apparatus of any one of claims 15-18, wherein the plurality of frequency domain resources comprises: the frequency domain resources with the bandwidth of X are frequency domain resources with a first bandwidth and the frequency domain resources with the bandwidth of Y are frequency domain resources with a second bandwidth, wherein each frequency domain resource with the bandwidth of the first bandwidth comprises RB of which the number is an integral multiple of L obtained by dividing M by N upwards, each frequency domain resource with the bandwidth of the second bandwidth comprises RB of which the number is an integral multiple of L obtained by dividing M by N downwards, M is the number of RB included by the second frequency domain resource, X is the remainder of M by dividing L by N, Y is the difference between N and X, L is an integer larger than or equal to 1, and N is the number of the plurality of frequency domain resources.

20. The apparatus of claim 19, wherein L is 1 or 4.

21. The apparatus of any one of claims 15-20, wherein the plurality of frequency domain resources are located at a position i in the second frequency domain resource, i being 0,1, \8230inorder from a low frequency to a high frequency of the second frequency domain resource, N-1, N being a number of the plurality of frequency domain resources; when i is an integer which is smaller than or equal to (N-1) divided by 2 to be rounded down and is larger than 0, the number of RBs included in the frequency domain resource corresponding to the position i-1 is larger than or equal to the number of RBs included in the frequency domain resource corresponding to the position i; and when i is an integer which is larger than (N-1) divided by 2 and is rounded down and smaller than N-1, the number of RBs included in the frequency domain resource corresponding to the position i +1 is larger than or equal to the number of RBs included in the frequency domain resource corresponding to the position i.

22. A transmission device of reference signals is characterized by comprising a transceiving unit and a processing unit;

the processing unit is configured to determine a first frequency domain resource according to reference signal configuration information sent to a terminal device, where the first frequency domain resource is one of multiple frequency domain resources, the multiple frequency domain resources are respectively part of a second frequency domain resource, and bandwidths of at least two frequency domain resources in the multiple frequency domain resources are not equal, and the second frequency domain resource is a continuous segment of frequency domain resources;

the transceiver unit is configured to receive a reference signal on the first frequency domain resource.

23. The apparatus of claim 22, wherein the plurality of frequency domain resources do not overlap with each other and a sum of bandwidths is equal to a bandwidth of the second frequency domain resource.

24. The apparatus of claim 22 or 23, wherein the reference signal configuration information comprises a fractional bandwidth factor P _F And a partial bandwidth frequency domain location factor K _F Said P is _F Indicating the number of the plurality of frequency domain resources, the K _F Indicating a position of the first frequency-domain resource in the plurality of frequency-domain resources.

25. The apparatus of any one of claims 22-24, wherein a bandwidth of any one of the plurality of frequency domain resources is a first bandwidth or a second bandwidth, the first bandwidth and the second bandwidth being unequal.

26. The apparatus of any one of claims 22-25, wherein the plurality of frequency domain resources comprises: the frequency domain resources with the bandwidth of X are frequency domain resources with a first bandwidth and the frequency domain resources with the bandwidth of Y are frequency domain resources with a second bandwidth, wherein each frequency domain resource with the bandwidth of the first bandwidth comprises RB of which the number is an integral multiple of L obtained by dividing M by N upwards, each frequency domain resource with the bandwidth of the second bandwidth comprises RB of which the number is an integral multiple of L obtained by dividing M by N downwards, M is the number of RB included by the second frequency domain resource, X is the remainder of M by dividing L by N, Y is the difference between N and X, L is an integer larger than or equal to 1, and N is the number of the plurality of frequency domain resources.

27. The apparatus of claim 26, wherein L is 1 or 4.

28. The apparatus of any one of claims 22-27, wherein the plurality of frequency domain resources are located at a position i in the second frequency domain resource, i being 0,1, \ 8230, in order from a low frequency to a high frequency of the second frequency domain resource, N-1, N being a number of the plurality of frequency domain resources; when i is an integer which is smaller than or equal to (N-1) divided by 2 to be rounded down and is larger than 0, the number of RBs included in the frequency domain resource corresponding to the position i-1 is larger than or equal to the number of RBs included in the frequency domain resource corresponding to the position i; and when i is an integer which is greater than (N-1) divided by 2 and is rounded down and less than N-1, the number of RBs included in the frequency domain resource corresponding to the position i +1 is greater than or equal to the number of RBs included in the frequency domain resource corresponding to the position i.

29. A communications apparatus, comprising a processor configured to perform the method of any of claims 1-7.

30. A communications apparatus, comprising a processor configured to perform the method of any of claims 8-14.

31. A communications apparatus comprising a processor configured to execute instructions stored in a memory to cause the method of any of claims 1-7 to be implemented.

32. A communications apparatus comprising a processor configured to execute instructions stored in a memory to cause the method of any of claims 8-14 to be implemented.

33. A computer program product comprising program code which, when executed, causes the method of any one of claims 1-7 to be carried out.

34. A computer program product comprising program code which, when executed, causes the method of any one of claims 8-14 to be carried out.

35. A computer-readable storage medium, in which a computer program or instructions is stored which, when executed by a communication apparatus, carries out the method of any one of claims 1-7.

36. A computer-readable storage medium, in which a computer program or instructions is stored which, when executed by a communication apparatus, carries out the method of any one of claims 8-14.