Reference signal transmitting method and related apparatus

Abstract

Provided in the embodiments of the present application are a reference signal transmitting method and a related apparatus. The method comprises: a terminal device determining a first sub-band corresponding to a first time-domain unit group, wherein the first sub-band is a partial bandwidth of a second sub-band, and the second sub-band is a partial bandwidth of a first frequency-hopping sub-band; and the terminal device transmitting a reference signal by means of the first sub-band corresponding to the first time-domain unit group. That is, a sub-band used for a terminal device to transmit a reference signal is further reduced. The present application is conducive to converging terminal power to a first sub-band corresponding to a first time-domain unit group, thereby facilitating an improvement in channel estimation precision and an improvement in channel estimation performance.

Description

Reference signal transmission method and related devices

[0001] This application claims priority to Chinese Patent Application No. 202411641972.9, filed on November 15, 2024, entitled “Reference Signal Transmission Method and Related Apparatus”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communication technology, and in particular to a reference signal transmission method and related apparatus. Background Technology

[0003] In wireless communication, reference signals are transmitted between the transmitting and receiving ends to transmit and receive data, obtain system synchronization, and provide feedback channel information. For example, the transmitting end sends a reference signal to the receiving end, and the receiving end receives the reference signal accordingly. The receiving end can then perform channel measurements based on the reference signal.

[0004] For example, during uplink channel measurement, when the network device needs to measure a large channel bandwidth, the terminal device can send uplink reference signals to the network device multiple times using frequency hopping. The terminal device sends the uplink reference signal multiple times across multiple time-domain symbols, and the bandwidth occupied by the uplink reference signal sent on each time-domain symbol is a portion of the total configured bandwidth for the uplink reference signal. For example, the terminal device can send the uplink reference signal on four time-domain symbols using frequency hopping, and the bandwidth occupied by the uplink reference signal in each symbol is one-quarter of the overall configured bandwidth.

[0005] However, in the scheme where terminal equipment transmits uplink reference signals via frequency hopping, how to further improve the channel estimation accuracy is a question worth considering. Summary of the Invention

[0006] This application provides a reference signal transmission method and related apparatus for improving channel estimation accuracy and performance.

[0007] The first aspect of this application provides a reference signal transmission method, which can be used in a terminal-side communication device, for example, executed by a terminal device. The terminal device can be a device or apparatus with a chip, or a device or apparatus with integrated circuits, or a chip, chip system, module, or control unit in the aforementioned device or apparatus; specific details are not limited in this application. It should be noted that in this application, the term "terminal device" can refer to the terminal device itself, or to the chip, functional module, or integrated circuit within the terminal device that performs the method provided in this application; specific details are not limited in this application. In the first aspect and its possible implementations, the method is described using the example of execution by a terminal device. The method includes: the terminal device determining a first sub-band corresponding to a first time-domain unit group, wherein the first sub-band corresponding to the first time-domain unit group is a portion of the bandwidth of a second sub-band, and the second sub-band is a portion of the bandwidth of a first frequency-hopping sub-band. Then, the terminal device transmits a reference signal through the first sub-band corresponding to the first time-domain unit group at at least one first time-domain unit in the first time-domain unit group.

[0008] In the above technical solution, the first sub-band corresponding to the first time-domain unit group is a portion of the bandwidth of the second sub-band. The second sub-band is a portion of the bandwidth of the first frequency-hopping sub-band. This means the sub-band for transmitting the reference signal by the terminal device is further reduced. This is beneficial for concentrating terminal power onto the first sub-band corresponding to the first time-domain unit group, thereby improving channel estimation accuracy and performance.

[0009] The second aspect of this application provides a reference signal receiving method, which can be used in a network-side communication device, for example, executed by a network device. The network device can be a device or apparatus with a chip, or a device or apparatus with integrated circuits, or a chip, chip system, module, or control unit in the aforementioned device or apparatus; specific details are not limited in this application. It should be noted that in this application, the term "network device" can refer to either the terminal device itself or the chip, functional module, or integrated circuit within the network device that performs the method provided in this application; specific details are not limited in this application. In the first aspect and its possible implementations, the method is described using an example of execution by a terminal device. The method includes: the network device determining a first sub-band corresponding to a first time-domain unit group, wherein the first sub-band corresponding to the first time-domain unit group is a portion of the bandwidth of a second sub-band, and the second sub-band is a portion of the bandwidth of a first frequency-hopping sub-band. Then, the network device receives a reference signal through the first sub-band corresponding to the first time-domain unit group at at least one first time-domain unit in the first time-domain unit group.

[0010] In the above technical solution, the first sub-band corresponding to the first time-domain unit group is a portion of the bandwidth of the second sub-band. The second sub-band is a portion of the bandwidth of the first frequency-hopping sub-band. This means the sub-band for transmitting the reference signal by the terminal device is further reduced. This is beneficial for concentrating terminal power onto the first sub-band corresponding to the first time-domain unit group, thereby improving channel estimation accuracy and performance.

[0011] Based on the first or second aspect, in one possible implementation, the first time-domain unit group includes R time-domain symbols, where R is a repetition factor, an integer greater than or equal to 1. The repetition factor indicates the number of times the reference signal is repeatedly transmitted on the first sub-band corresponding to the first time-domain unit group. This enables the reference signal to be transmitted R times on the first time-domain unit group. This is beneficial for network devices to receive the reference signal and perform better channel estimation.

[0012] Based on the first or second aspect, in one possible implementation, the R time-domain symbols are consecutive, where R is an integer greater than or equal to 2; or, the time-domain interval between any two time-domain symbols among the R time-domain symbols is equal, where R is an integer greater than or equal to 3. This implementation illustrates some possible implementations of the R time-domain symbols, which helps to enrich the scheme's implementation.

[0013] Based on the first or second aspect, in one possible implementation, the first sub-band corresponding to the first time-domain unit group is one of the Q sub-bands included in the second sub-band, where Q is the cyclic frequency hopping factor. The cyclic frequency hopping factor is used for frequency hopping transmission of the Q sub-bands in the second sub-band. In this implementation, the first sub-band corresponding to the first time-domain unit group is one of the Q sub-bands, thereby further reducing the bandwidth of the reference signal transmitted each time. This is beneficial for improving channel estimation accuracy. On the other hand, the cyclic frequency hopping factor used for frequency hopping transmission of the Q sub-bands in the second sub-band is beneficial for realizing channel measurement of the second sub-band, thus achieving full-band channel estimation.

[0014] Based on the first or second aspect, in one possible implementation, the bandwidth of each of the Q subbands is equal.

[0015] Based on the first or second aspect, in one possible implementation, the frequency domain positions occupied by the different sub-bands of the Q sub-bands are not the same.

[0016] Based on the first or second aspect, in one possible implementation, the frequency domain positions occupied by the Q sub-bands are consecutive; or, the frequency domain spacing between any two sub-bands in the Q sub-bands is equal.

[0017] Based on the first or second aspect, in one possible implementation, the bandwidth of the second subband is greater than the total bandwidth of the Q subbands.

[0018] Based on the first or second aspect, in one possible implementation, the Q sub-bands correspond to Q time-domain unit groups; the method further includes: transmitting reference signals through the sub-bands corresponding to the Q-1 time-domain unit groups, where the Q-1 time-domain unit groups are the time-domain unit groups other than the first time-domain unit group among the Q time-domain unit groups. This enables transmission of the Q sub-bands via frequency hopping, achieving channel measurement of the second sub-band. Full-band channel estimation is thus achieved.

[0019] Based on the first or second aspect, in one possible implementation, the second sub-band is the P included in the first frequency hopping sub-band. F One of the subbands, P F This represents the frequency domain scaling factor. In this implementation, the second sub-band can be a portion of the bandwidth of the first frequency-hopping sub-band. This avoids full-bandwidth channel measurements and effectively reduces measurement resources.

[0020] Based on the first or second aspect, in one possible implementation, the starting frequency domain position of the reference signal is determined according to Q. and At least one of them is determined, where Q is the cyclic frequency hopping factor. This is the first frequency hopping parameter. It is the second frequency hopping parameter. It is the third frequency hopping parameter. This is the fourth frequency hopping parameter. Therefore, the starting frequency domain position of the reference signal can also be determined by combining Q and / or Sure.

[0021] Based on the first or second aspect, in one possible implementation, the starting frequency domain position of the reference signal... satisfy: or, or, or,

[0022] in, It is based on the frequency hopping parameters of the transmitting comb. And the number of combs K TC Definitely, P F This is the frequency domain scaling factor.

[0023] Based on the first or second aspect, one possible implementation is... It is determined based on Q.

[0024] Based on the first or second aspect, one possible implementation is... satisfy: or, or, or, or,

[0025] The first time-domain unit group includes the first time-domain symbol. This indicates the number of frequency domain resource blocks occupied by the reference signal transmitted on the first time domain symbol; k represents the number of subcarriers corresponding to each frequency domain resource block. q (l″′) is the subband cyclic frequency hopping parameter, k hop These are the higher-layer frequency hopping parameters configured by the network equipment for the terminal equipment, k F ∈{0,1,…,P F -1}, or, k F =0.

[0026] Based on the first or second aspect, one possible implementation is... It is determined by Q.

[0027] Based on the first or second aspect, one possible implementation is... satisfy: or, or,

[0028] The first time-domain unit group includes the first time-domain symbol. This indicates the number of frequency domain resource blocks occupied by the reference signal transmitted on the first time domain symbol; k represents the number of subcarriers corresponding to each frequency domain resource block. q (l″′) is the subband cyclic frequency hopping parameter.

[0029] Based on the first or second aspect, in one possible implementation, k q (l″′) is based on R, Q, and P. F At least one of them is determined, R is the repetition factor, and P is the repetition factor. F It is the frequency domain scaling factor.

[0030] Based on the first or second aspect, in one possible implementation, k q (l″′) satisfies: k q (l″′) = l″′; or, k q (l″′)=l″′×a+b; or, k q (l″′)=(l″′×a+b)modQ; or, k q (l″′)=l″′P F ;

[0031] Where a and b are constants, and l″′ is based on R, Q, and P. F At least one of them is determined, and R is the repetition factor.

[0032] Based on the first or second aspect, in one possible implementation, the number of transmissions or the transmission count n corresponding to the reference signal. SRS It is determined based on at least one of l′, s, R and Q; wherein, the first time-domain unit group includes a first time-domain symbol, l′ is the number of the first time-domain symbol, R is the repetition factor, Q is the cyclic frequency hopping factor, and s = 1 or s = 2.

[0033] Based on the first or second aspect, in one possible implementation, if the resource occupied by the reference signal is a non-periodic resource, n SRS satisfy:

[0034] Based on the first or second aspect, in one possible implementation, if the resource occupied by the reference signal is a periodic resource or a semi-persistent resource, n SRS satisfy:

[0035] in, n represents the number of time slots within a system frame. f Indicates the system frame number. T represents the slot number within a system frame. offset T represents the time slot offset value. SRS The time slot period is indicated by the first time domain unit group, which includes a first time domain symbol, where l′ represents the number of the first time domain symbol. This represents the number of time-domain symbols within the resources occupied by the reference signal, where R is the repetition factor, Q is the cyclic frequency hopping factor, and s = 1 or s = 2. This implementation example demonstrates n... SRS Another possible calculation method, which facilitates the implementation of the scheme.

[0036] Based on the first or second aspect, in one possible implementation, the first sub-band corresponding to the first time-domain unit group is the P included in the second sub-band. F One of the subbands, P F This refers to the frequency domain scaling factor. In this implementation, an alternative definition of the first sub-band corresponding to the first time-domain unit group is provided to scale the second sub-band, meaning that the reference signal is transmitted only within a portion of the bandwidth of the second sub-band. This helps reduce transmission resource and channel measurement overhead.

[0037] Based on the first or second aspect, in one possible implementation, P F Each subband has the same bandwidth.

[0038] Based on the first or second aspect, in one possible implementation, the first frequency-hopping subband includes Q subbands, and the second subband is one of the Q subbands, where Q is a cyclic frequency-hopping factor. The cyclic frequency-hopping factor is used for frequency-hopping transmission of the subband used for transmitting the reference signal on the Q subbands. This facilitates channel measurement of the subband used for transmitting the reference signal on the Q subbands.

[0039] Based on the first or second aspect, in one possible implementation, the different sub-bands occupy different frequency domain positions among the Q sub-bands.

[0040] Based on the first or second aspect, in one possible implementation, the bandwidth of each of the Q subbands is equal.

[0041] Based on the first or second aspect, in one possible implementation, the frequency domain positions occupied by different sub-bands in the Q sub-bands are continuous.

[0042] Based on the first aspect, in one possible implementation, the Q sub-bands correspond to Q time-domain unit groups; the method further includes: the terminal device transmits a reference signal through the first sub-band corresponding to the Q-1 time-domain unit groups, where the Q-1 time-domain unit groups are the time-domain unit groups other than the first time-domain unit group among the Q time-domain unit groups. This achieves frequency-hopping transmission of the sub-bands used for transmitting the reference signal on the Q sub-bands.

[0043] Based on the second aspect, in one possible implementation, the Q sub-bands correspond to Q time-domain unit groups; the method further includes: the network device receives reference signals through the first sub-band corresponding to the Q-1 time-domain unit groups, where the Q-1 time-domain unit groups are the time-domain unit groups other than the first time-domain unit group among the Q time-domain unit groups. This facilitates the network device to perform channel estimation by combining the reference signals received on the Q time-domain unit groups.

[0044] Based on the first or second aspect, in one possible implementation, the starting frequency domain position of the reference signal is determined according to Q and and At least one of them is determined, where Q is the cyclic frequency hopping factor. This is the first frequency hopping parameter. It is the second frequency hopping parameter. It is the third frequency hopping parameter. It is the fourth frequency hopping parameter.

[0045] Based on the first or second aspect, in one possible implementation, the starting frequency domain position of the reference signal... satisfy: or, or, or,

[0046] in, It is based on the frequency hopping parameters of the transmitting comb. And the number of combs K TC Definitely, P F This is the frequency domain scaling factor.

[0047] Based on the first or second aspect, one possible implementation is... It is determined based on Q.

[0048] Based on the first or second aspect, one possible implementation is... satisfy: or, or, or, or,

[0049] The first time-domain unit group includes the first time-domain symbol. This indicates the number of frequency domain resource blocks occupied by the reference signal transmitted on the first time domain symbol; k represents the number of subcarriers corresponding to each frequency domain resource block. q (l″′) is the subband cyclic frequency hopping parameter, k hop These are the higher-layer frequency hopping parameters configured by the network equipment for the terminal equipment, k F ∈{0,1,…,P F -1}, or, k F =0.

[0050] Based on the first or second aspect, one possible implementation is... It is determined by Q.

[0051] Based on the first or second aspect, one possible implementation is... satisfy: or, or, or,

[0052] The first time-domain unit group includes the first time-domain symbol. This indicates the number of frequency domain resource blocks occupied by the reference signal transmitted on the first time domain symbol; k represents the number of subcarriers corresponding to each frequency domain resource block. q (l″′) is the subband cyclic frequency hopping parameter.

[0053] Based on the first or second aspect, in one possible implementation, k q (l″′) is based on R, Q, and P. F At least one of them is determined, R is the repetition factor, and P is the repetition factor. F It is the frequency domain scaling factor.

[0054] Based on the first or second aspect, in one possible implementation, k q (l″′) satisfies: k q (l″′) = l″′; or, k q (l″′)=l″′×a+b; or, k q (l″′)=(l″′×a+b)modQ;

[0055] Where a and b are constants, and l″′ is based on R, Q, and P. F At least one of them is determined, and R is the repetition factor.

[0056] Based on the first or second aspect, in one possible implementation, if the resource occupied by the reference signal is a non-periodic resource, n SRS satisfy:

[0057] Based on the first or second aspect, in one possible implementation, if the resource occupied by the reference signal is a periodic resource or a semi-persistent resource, n SRS satisfy:

[0058] in, n represents the number of time slots within a system frame. f Indicates the system frame number. T represents the slot number within a system frame. offset T represents the time slot offset value. SRS Indicates the time slot period, The number of time-domain symbols within the resources occupied by the reference signal is represented by R, which is the repetition factor, Q is the cyclic frequency hopping factor, and s = 1 or s = 2.

[0059] Based on the first or second aspect, in one possible implementation, the length of the transmission sequence corresponding to the reference signal is based on m. SRS,b , K TC and P F Determined; wherein, the first time-domain unit group includes the first time-domain symbol, m SRS,b This indicates the number of frequency domain resource blocks occupied by the reference signal transmitted on the first time domain symbol. K represents the number of subcarriers corresponding to each frequency domain resource block. TC P represents the number of combs.F Represents the frequency domain spread factor of higher-level parameters; or,

[0060] The length of the transmission sequence corresponding to the reference signal is based on m SRS,b , K TC P F And Q is determined; wherein, the first time-domain unit group includes the first time-domain symbol, m SRS,b This indicates the number of frequency domain resource blocks occupied by the reference signal transmitted on the first time domain symbol. K represents the number of subcarriers corresponding to each frequency domain resource block. TC P represents the number of combs. F This represents the frequency domain scaling factor or frequency domain scaling factor, where Q is the cyclic frequency hopping factor. In this implementation, the two possible ways to determine the length of the transmission sequence carried on each time-domain symbol improve the feasibility of the scheme.

[0061] Based on the first or second aspect, in one possible implementation, the length of the transmission sequence corresponding to the reference signal... satisfy: or,

[0062] A third aspect of this application provides a communication device, comprising:

[0063] The processing module is used to determine the first sub-band corresponding to the first time domain unit group, wherein the first sub-band corresponding to the first time domain unit group is a portion of the bandwidth in the second sub-band, and the second sub-band is a portion of the bandwidth of the first frequency hopping sub-band.

[0064] The transceiver module is used to transmit a reference signal through a first sub-band corresponding to the first time domain unit group at least one first time domain unit group.

[0065] A fourth aspect of this application provides a communication device, comprising:

[0066] The processing module is used to determine the first sub-band corresponding to the first time domain unit group, wherein the first sub-band corresponding to the first time domain unit group is a portion of the bandwidth in the second sub-band, and the second sub-band is a portion of the bandwidth of the first frequency hopping sub-band.

[0067] The transceiver module is used to receive a reference signal through a first sub-band corresponding to the first time domain unit group at at least one first time domain unit in the first time domain unit group.

[0068] Based on the third or fourth aspect, in one possible implementation, the first time-domain unit group includes R time-domain symbols, where R is a repetition factor, which is an integer greater than or equal to 1. The repetition factor is used to indicate the number of times the reference signal is repeatedly transmitted on the first sub-band corresponding to the first time-domain unit group.

[0069] Based on the third or fourth aspect, in one possible implementation, the R time-domain symbols are consecutive, where R is an integer greater than or equal to 2; or, the time-domain interval between any two time-domain symbols in the R time-domain symbols is equal, where R is an integer greater than or equal to 3.

[0070] Based on the third or fourth aspect, in one possible implementation, the first sub-band corresponding to the first time-domain unit group is one of the Q sub-bands included in the second sub-band, where Q is the cyclic frequency hopping factor, which is used for frequency hopping transmission of the Q sub-bands in the second sub-band.

[0071] Based on the third or fourth aspect, in one possible implementation, the bandwidth of each of the Q subbands is equal.

[0072] Based on the third or fourth aspect, in one possible implementation, the frequency domain positions occupied by different sub-bands of the Q sub-bands are not the same.

[0073] Based on the third or fourth aspect, in one possible implementation, the frequency domain positions occupied by the Q sub-bands are consecutive; or, the frequency domain spacing between any two sub-bands in the Q sub-bands is equal.

[0074] Based on the third or fourth aspect, in one possible implementation, the bandwidth of the second subband is greater than the total bandwidth of the Q subbands.

[0075] Based on the third aspect, in one possible implementation, the Q sub-bands correspond to the Q time-domain unit groups; the transceiver module is also used to transmit reference signals on the Q-1 time-domain unit groups through the sub-bands corresponding to the Q-1 time-domain unit groups, where the Q-1 time-domain unit groups are the time-domain unit groups other than the first time-domain unit group among the Q time-domain unit groups.

[0076] Based on the fourth aspect, in one possible implementation, the Q sub-bands correspond to the Q time-domain unit groups; the transceiver module is also used to receive reference signals on the Q-1 time-domain unit groups through the sub-bands corresponding to the Q-1 time-domain unit groups, where the Q-1 time-domain unit groups are the time-domain unit groups other than the first time-domain unit group among the Q time-domain unit groups.

[0077] Based on the third or fourth aspect, in one possible implementation, the second sub-band is the P included in the first frequency hopping sub-band. F One of the subbands, P F This is the frequency domain scaling factor.

[0078] Based on the third or fourth aspect, in one possible implementation, the starting frequency domain position of the reference signal is determined according to Q. and At least one of them is determined, where Q is the cyclic frequency hopping factor. This is the first frequency hopping parameter. It is the second frequency hopping parameter. It is the third frequency hopping parameter. This is the fourth frequency hopping parameter. Therefore, the starting frequency domain position of the reference signal can also be determined by combining Q and / or Sure.

[0079] Based on the third or fourth aspect, in one possible implementation, the starting frequency domain position of the reference signal... satisfy: or, or, or,

[0080] in, It is based on the frequency hopping parameters of the transmitting comb. And the number of combs K TC Definitely, P F This is the frequency domain scaling factor.

[0081] Based on the third or fourth aspect, one possible implementation is... It is determined based on Q.

[0082] Based on the third or fourth aspect, one possible implementation is... satisfy: or, or, or, or,

[0083] The first time-domain unit group includes the first time-domain symbol. This indicates the number of frequency domain resource blocks occupied by the reference signal transmitted on the first time domain symbol; k represents the number of subcarriers corresponding to each frequency domain resource block. q (l″′) is the subband cyclic frequency hopping parameter, k hop These are the higher-level frequency hopping parameters configured by network equipment for communication devices, k F ∈{0,1,…,P F -1}, or, k F =0.

[0084] Based on the third or fourth aspect, one possible implementation is... It is determined by Q.

[0085] Based on the third or fourth aspect, one possible implementation is... satisfy: or, or, or,

[0086] The first time-domain unit group includes the first time-domain symbol. This indicates the number of frequency domain resource blocks occupied by the reference signal transmitted on the first time domain symbol; k represents the number of subcarriers corresponding to each frequency domain resource block. q (l″′) is the subband cyclic frequency hopping parameter.

[0087] Based on the third or fourth aspect, in one possible implementation, k q (l″′) is based on R, Q, and P. F At least one of them is determined, R is the repetition factor, and P is the repetition factor. F It is the frequency domain scaling factor.

[0088] Based on the third or fourth aspect, in one possible implementation, k q (l″′) satisfies: k q (l″′) = l″′; or, k q (l″′)=l″′×a+b; or, k q (l″′)=(l″′×a+b)modQ;

[0089] Where a and b are constants, and l″′ is based on R, Q, and P. F At least one of them is determined, and R is the repetition factor.

[0090] Based on the third or fourth aspect, in one possible implementation, the number of transmissions or the transmission count n corresponding to the reference signal. SRS It is determined based on at least one of l′, s, R and Q; wherein, the first time-domain unit group includes a first time-domain symbol, l′ is the number of the first time-domain symbol, R is the repetition factor, Q is the cyclic frequency hopping factor, and s = 1 or s = 2.

[0091] Based on the third or fourth aspect, in one possible implementation, if the resource occupied by the reference signal is a non-periodic resource, n SRS satisfy:

[0092] Based on the third or fourth aspect, in one possible implementation, if the resource occupied by the reference signal is a periodic resource or a semi-persistent resource, n SRS satisfy:

[0093] in, n represents the number of time slots within a system frame. f Indicates the system frame number. T represents the slot number within a system frame. offset T represents the time slot offset value. SRS The time slot period is indicated by the first time domain unit group, which includes a first time domain symbol, where l′ represents the number of the first time domain symbol. This represents the number of time-domain symbols within the resources occupied by the reference signal, where R is the repetition factor, Q is the cyclic frequency hopping factor, and s = 1 or s = 2.

[0094] Based on the third or fourth aspect, in one possible implementation, the first sub-band corresponding to the first time-domain unit group is the P included in the second sub-band. F One of the subbands, P F This is the frequency domain scaling factor.

[0095] Based on the third or fourth aspect, in one possible implementation, P F Each subband has the same bandwidth.

[0096] Based on the third or fourth aspect, in one possible implementation, the first frequency-hopping subband includes Q subbands, and the second subband is one of the Q subbands, where Q is a cyclic frequency-hopping factor. The cyclic frequency-hopping factor is used for frequency-hopping transmission of the subband used for transmitting the reference signal on the Q subbands. This facilitates channel measurement of the subband used for transmitting the reference signal on the Q subbands.

[0097] Based on the third or fourth aspect, in one possible implementation, different sub-bands occupy different frequency domain positions among the Q sub-bands.

[0098] Based on the third or fourth aspect, in one possible implementation, the bandwidth of each of the Q subbands is equal.

[0099] Based on the third or fourth aspect, in one possible implementation, the frequency domain positions occupied by different sub-bands in the Q sub-bands are continuous.

[0100] Based on the third or fourth aspect, in one possible implementation, the length of the transmission sequence corresponding to the reference signal is based on m. SRS,b , K TC and P F Determined; wherein, the first time-domain unit group includes the first time-domain symbol, m SRS,b This indicates the number of frequency domain resource blocks occupied by the reference signal transmitted on the first time domain symbol. K represents the number of subcarriers corresponding to each frequency domain resource block. TC P represents the number of combs. FRepresents the frequency domain spread factor of higher-level parameters; or,

[0101] The length of the transmission sequence corresponding to the reference signal is based on m SRS,b , K TC P F And Q is determined; wherein, the first time-domain unit group includes the first time-domain symbol, m SRS,b This indicates the number of frequency domain resource blocks occupied by the reference signal transmitted on the first time domain symbol. K represents the number of subcarriers corresponding to each frequency domain resource block. TC P represents the number of combs. F This represents the frequency domain scaling factor or frequency domain scaling factor, where Q is the cyclic frequency hopping factor.

[0102] Based on the third or fourth aspect, in one possible implementation, the length of the transmission sequence corresponding to the reference signal... satisfy: or,

[0103] Based on the third or fourth aspect, in one possible implementation, the starting frequency domain position of the reference signal is determined according to Q and and At least one of them is determined, where Q is the cyclic frequency hopping factor. This is the first frequency hopping parameter. It is the second frequency hopping parameter. It is the third frequency hopping parameter. It is the fourth frequency hopping parameter.

[0104] Based on the third or fourth aspect, in one possible implementation, the starting frequency domain position of the reference signal... satisfy: or, or, or,

[0105] in, It is based on the frequency hopping parameters of the transmitting comb. And the number of combs K TC Definitely, P F This is the frequency domain scaling factor.

[0106] Based on the third or fourth aspect, one possible implementation is... It is determined based on Q.

[0107] Based on the third or fourth aspect, one possible implementation is... satisfy: or, or, or, or,

[0108] The first time-domain unit group includes the first time-domain symbol. This indicates the number of frequency domain resource blocks occupied by the reference signal transmitted on the first time domain symbol; k represents the number of subcarriers corresponding to each frequency domain resource block. q (l″′) is the subband cyclic frequency hopping parameter, k hop These are the higher-level frequency hopping parameters configured by network equipment for communication devices, k F ∈{0,1,…,P F -1}, or, k F =0.

[0109] Based on the third or fourth aspect, one possible implementation is... It is determined by Q.

[0110] Based on the third or fourth aspect, one possible implementation is... satisfy: or, or, or,

[0111] The first time-domain unit group includes the first time-domain symbol. This indicates the number of frequency domain resource blocks occupied by the reference signal transmitted on the first time domain symbol; k represents the number of subcarriers corresponding to each frequency domain resource block. q (l″′) is the subband cyclic frequency hopping parameter.

[0112] Based on the third or fourth aspect, in one possible implementation, k q (l″′) is based on R, Q, and P. F At least one of them is determined, R is the repetition factor, and P is the repetition factor. F It is the frequency domain scaling factor.

[0113] Based on the third or fourth aspect, in one possible implementation, k q (l″′) satisfies: k q (l″′) = l″′; or, k q (l″′)=l″′×a+b; or, k q (l″′)=(l″′×a+b)modQ;

[0114] Where a and b are constants, and l″′ is based on R, Q, and P. F At least one of them is determined, and R is the repetition factor.

[0115] Based on the third or fourth aspect, in one possible implementation, if the resource occupied by the reference signal is a non-periodic resource, n SRS satisfy:

[0116] Based on the third or fourth aspect, in one possible implementation, if the resource occupied by the reference signal is a periodic resource or a semi-persistent resource, n SRS satisfy:

[0117] in, n represents the number of time slots within a system frame. f Indicates the system frame number. T represents the slot number within a system frame. offset T represents the time slot offset value. SRS Indicates the time slot period, The number of time-domain symbols within the resources occupied by the reference signal is represented by R, which is the repetition factor, Q is the cyclic frequency hopping factor, and s = 1 or s = 2.

[0118] A fifth aspect of this application provides a communication device comprising a processor and a memory. The memory stores computer programs or computer instructions, and the processor is configured to call and execute the computer programs or computer instructions stored in the memory, causing the processor to implement any one of the implementations of the first or second aspect.

[0119] Optionally, the communication device may also include a transceiver, and the processor is used to control the transceiver to send and receive signals.

[0120] A sixth aspect of this application provides a communication device including a processor and an interface circuit. The processor is configured to communicate with other devices via the interface circuit and to perform the methods described in the first or second aspect above. The processor may include one or more devices.

[0121] A seventh aspect of this application provides a communication device including a processor for connection to a memory, for calling a program or instructions stored in the memory to execute the method described in the first or second aspect above. The memory may be located within or outside the communication device. The processor may include one or more processors.

[0122] In one implementation, the terminal device of the first aspect described above can be a chip or a chip system.

[0123] Optionally, the communication device shown in the third to seventh aspects may be a terminal device, a communication module in a terminal device, or a chip in a terminal device responsible for communication functions.

[0124] The eighth aspect of this application provides a computer program product including computer instructions, which, when run on a computer, causes the computer to perform an implementation as described in either the first or second aspect.

[0125] The ninth aspect of this application provides a computer-readable storage medium including a computer program or instructions that, when executed on a computer, cause the computer to perform any of the implementations of the first or second aspect.

[0126] The tenth aspect of this application provides a chip device including a processor for calling a computer program or computer instructions in memory to cause the processor to execute any of the implementations in the first aspect described above.

[0127] Optionally, the processor is coupled to the memory via an interface.

[0128] Optionally, the memory is either built into the chip device or connected to the chip device.

[0129] The eleventh aspect of this application provides a communication system, which includes a notification device as shown in the third aspect and a communication device as shown in the fourth aspect.

[0130] As can be seen from the above technical solution, the terminal device determines the first sub-band corresponding to the first time-domain unit group. The first sub-band corresponding to the first time-domain unit group is a portion of the bandwidth of the second sub-band. The second sub-band is a portion of the bandwidth of the first frequency-hopping sub-band. Then, the terminal device transmits a reference signal through the first sub-band corresponding to the first time-domain unit group at at least one first time-domain unit in the first time-domain unit group. Therefore, it can be seen that the first sub-band corresponding to the first time-domain unit group is a portion of the bandwidth of the second sub-band. The second sub-band is a portion of the bandwidth of the first frequency-hopping sub-band. That is, the sub-band through which the terminal device transmits the reference signal is further reduced. This is beneficial for concentrating terminal power onto the first sub-band corresponding to the first time-domain unit group, which helps improve channel estimation accuracy and performance. Attached Figure Description

[0131] Figure 1 is a schematic diagram of a communication system according to an embodiment of this application;

[0132] Figure 2 is another schematic diagram of the communication system according to an embodiment of this application;

[0133] Figure 3 is a schematic diagram of an open radio access network (open RAN, O-RAN, or ORAN) system according to an embodiment of this application;

[0134] Figure 4 is a structural schematic diagram of an access network device according to an embodiment of this application;

[0135] Figure 5 is a schematic diagram of frequency hopping SRS transmission;

[0136] Figure 6 is a schematic diagram of another frequency-hopping SRS transmission.

[0137] Figure 7 shows the corresponding C in the SRS bandwidth configuration table. SRS A schematic diagram of the tree structure when the value is 18;

[0138] Figure 8 is a schematic diagram of another type of frequency hopping SRS transmission;

[0139] Figure 9 is a schematic diagram of frequency hopping transmission of SRS within the system BWP;

[0140] Figure 10 is a schematic diagram of a reference signal transmission method according to an embodiment of this application;

[0141] Figure 11A is a schematic diagram of another type of frequency hopping SRS transmission;

[0142] Figure 11B is a schematic diagram of frequency hopping transmission SRS provided in an embodiment of this application;

[0143] Figure 11C is another schematic diagram of frequency hopping transmission SRS provided in an embodiment of this application;

[0144] Figure 11D is another schematic diagram of frequency hopping transmission SRS provided in an embodiment of this application;

[0145] Figure 11E is a schematic diagram of the transmission sequence on the time-frequency resource block for transmitting SRS according to an embodiment of this application;

[0146] Figure 12A is a schematic diagram of another type of frequency hopping SRS transmission;

[0147] Figure 12B is another schematic diagram of frequency hopping transmission SRS provided in the embodiment of this application;

[0148] Figure 12C is another schematic diagram of frequency hopping transmission SRS provided in the embodiment of this application;

[0149] Figure 13 is a schematic diagram of a communication device provided in an embodiment of this application;

[0150] Figure 14 is another schematic diagram of the communication device provided in an embodiment of this application;

[0151] Figure 15 is a schematic diagram of a terminal device provided in an embodiment of this application;

[0152] Figure 16 is a schematic diagram of a network device provided in an embodiment of this application. Detailed Implementation

[0153] This application provides a reference signal transmission method and related apparatus to improve channel estimation accuracy and enhance channel estimation performance.

[0154] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0155] References to "one embodiment" or "some embodiments" as described in this application mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0156] In the description of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. "And / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Furthermore, "at least one" means one or more, and "multiple" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or multiple items. For example, at least one of a, b, or c can represent: a, b, c; a and b; a and c; b and c; or a and b and c. Where a, b, and c can be single or multiple.

[0157] It is understood that in this application, "instruction" can include direct instruction, indirect instruction, explicit instruction, and implicit instruction. When describing a certain instruction information to indicate A, it can be understood that the instruction information carries A, directly indicates A, or indirectly indicates A.

[0158] The technical solutions of this application can be applied to various communication systems. For example, 5th generation (5G) systems, new radio (NR) systems, long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, universal mobile telecommunication system (UMTS), future mobile communication systems, vehicle-to-everything (V2X) communication systems, device-to-device (D2D) communication systems, Internet of Things (IoT) communication systems, industrial internet communication systems, or satellite communication systems, etc. The wireless communication systems involved in this application also include, but are not limited to, narrowband Internet of Things (NB-IoT) systems.

[0159] The following section, in conjunction with Figures 1 and 2, outlines two possible scenarios to which this application applies.

[0160] Figure 1 is a schematic diagram of a communication system according to an embodiment of this application. As shown in Figure 1, the communication system includes a network device 101 and a terminal device 102. A communication connection can be established between the network device 101 and the terminal device 102, and the technical solutions provided in this application can be executed.

[0161] Figure 2 is another schematic diagram of the communication system according to an embodiment of this application. As shown in Figure 2, the communication system includes a network device 201, a terminal device 202, and a relay node 203. The network device 201 and the terminal device 202 can establish a connection through the relay node 203 and execute the technical solution provided in this application.

[0162] The communication systems to which this application applies include terminal equipment and network equipment. Terminal equipment and network equipment are described below.

[0163] Terminal equipment, also known as user equipment (UE), mobile station (MS), mobile terminal (MT), fixed wireless access (FWA), customer premises equipment (CPE), etc., refers to devices that include wireless communication capabilities (providing voice / data connectivity to users). Examples include handheld devices with wireless connectivity, in-vehicle devices, and machine-type communication (MTC) terminals. Currently, terminal devices can include: mobile phones, tablets, laptops, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving (e.g., drones, vehicles), wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, and wireless terminals in smart homes. For example, wireless terminals in self-driving can be drones, helicopters, or airplanes. For example, wireless terminals in vehicle-to-everything (V2X) can be in-vehicle equipment, vehicle-mounted equipment, in-vehicle modules, vehicles, or ships. Wireless terminals in industrial control can be cameras, robots, or robotic arms. Wireless terminals in smart homes can be televisions, air conditioners, robot vacuums, speakers, or set-top boxes. The terminal device can also be a device or module that is connected to the communication system shown above and has corresponding communication functions. The terminal device usually contains a communication module, circuit or chip that performs the corresponding communication function, and the terminal device is also configured with program instructions for performing the corresponding communication function.

[0164] It should be noted that the terminal device can be a device or apparatus with a chip, or a device or apparatus with integrated circuits, or a chip, chip system, processor, circuit, module, or control unit in the device or apparatus shown above; the specific application does not limit this. It should also be noted that in this application, when referring to a terminal device, it can refer to the terminal device itself, or to the chip, functional module, or integrated circuit in the terminal device that performs the method provided in this application; the specific application does not limit this.

[0165] A network device is a device deployed in a radio access network to provide wireless communication functions for terminal devices. Network devices may also be referred to as radio access network (RAN) entities, access nodes, network nodes, access network equipment, or communication devices, etc.

[0166] Specifically, the network equipment can be access network equipment for cellular systems related to the 3rd Generation Partnership Project (3GPP). For example, fourth-generation (4G) mobile communication systems, 5G mobile communication systems, or future mobile communication systems. The network equipment can also be access network equipment in open RAN (O-RAN or ORAN) or cloud radio access network (CRAN). Alternatively, the network equipment can also be access network equipment in a communication system resulting from the integration of two or more of the above communication systems.

[0167] Network equipment includes, but is not limited to: evolved Node B (eNB), radio network controller (RNC), Node B (NB), base station controller (BSC), base transceiver station (BTS), home base station (e.g., home evolved Node B, or home Node B, HNB), baseband unit (BBU), access point (AP) in wireless fidelity (Wi-Fi) systems, macro base station, micro base station, wireless relay node, donor node, radio controller in CRAN scenarios, wireless backhaul node, transmission point (TP), or transmission and reception point (TRP). TRP can also stand for transmit / receive point. Network equipment can also be access network equipment in 5G mobile communication systems. For example, a next-generation NodeB (gNB), TRP, TP in a new radio (NR) system, or one or a group of antenna panels (including multiple antenna panels) in a base station in a 5G mobile communication system. Alternatively, network equipment can also be network nodes that constitute a gNB or transmission point. For example, a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), etc. CU and DU can be set up separately or included in the same network element. For example, a BBU. RU can be included in radio equipment or radio units. For example, in a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH). Alternatively, network equipment can also be a server, wearable device, vehicle, or in-vehicle equipment, etc. For example, in V2X technology, network equipment can be a roadside unit (RSU).

[0168] It should be noted that CU (or CU-CP and CU-UP), DU, or RU may have different names in different systems, but those skilled in the art will understand their meaning. For example, in an ORAN system, CU can also be called an open centralized unit (O-CU) or an open CU, DU can also be called an open distributed unit (O-DU), centralized unit control plane (CU-CP) can also be called an open centralized unit control plane (O-CU-CP) or an open CU-CP, centralized unit user plane (CU-UP) can also be called an open centralized unit user plane (O-CU-UP) or an open CU-UP, and RU can also be called an open radio unit (O-RU). This application does not impose any specific limitations. Any of the units CU, CU-CP, CU-UP, DU, and RU in this application can be implemented through software modules, hardware modules, or a combination of software and hardware modules.

[0169] The ORAN system is described below. Figure 3 is a schematic diagram of an ORAN system according to an embodiment of this application. The ORAN system includes a core network, access network equipment, and UE. Optionally, the ORAN system may also include other components besides those shown in Figure 3; this application does not limit the specific components included.

[0170] Access network devices can communicate with the core network (CN) via a backhaul link. Access network devices can also communicate with the UE via an air interface. Specifically, the BBU in the access network device communicates with the core network via a backhaul link. The RU in the access network device communicates with at least one UE via an air interface. The BBU communicates with at least one RU via a fronthaul link; the BBU and RU may or may not be co-located.

[0171] A BBU consists of at least one CU and at least one DU, and the CU and DU can communicate with each other via at least one midhaul link.

[0172] In one possible implementation, as shown in Figure 4, the CU is a logical node carrying the radio resource control (RRC), service data adaptation protocol (SDAP) layer, packet data convergence protocol (PDCP) layer, and other control functions of the access network equipment. The CU can connect to network nodes such as the core network through interfaces, such as the E2 interface. Optionally, the CU can have some core network functions. The CU (e.g., the PDCP layer and / or higher layers of the CU) connects to the DU (e.g., the radio link control (RLC) layer and lower layers of the DU) through interfaces, such as the F1 interface. Optionally, the F1 interface can provide control plane (C-Plane) and user plane (U-Plane) functions (e.g., interface management, system information management, UE context management, RRC message transmission, etc.). F1AP is the application protocol of the F1 interface, defining the signaling procedures of F1 in some examples. The F1 interface supports control plane F1-C and user plane F1-U.

[0173] Optionally, as shown in Figure 4, the CU can be split into CU-CP and CU-UP. CU-CP is a logical node carrying the control plane (PDCP-C) layer, which carries the RRC layer and the Packet Data Convergence Protocol layer, and is used to implement the CU's control plane functions. CU-CP can interact with network elements in the core network used to implement control plane functions. These network elements in the core network can be access and mobility function (AMF) network elements, such as the access and mobility management function (AMF) in a 5G system. The AMF network element is responsible for mobility management in the mobile network, such as terminal device location updates, terminal device registration with the network, and terminal device handover. CU-UP is a logical node carrying the user plane (PDCP-U) layer, which carries the SDAP layer and the Packet Data Convergence Protocol layer, and is used to implement the CU's user plane functions. CU-UP can interact with network elements in the core network used to implement user plane functions. In the core network, network elements used to implement user plane functions, such as the user plane function (UPF) in a 5G system, are responsible for forwarding and receiving data in terminal devices. The above configuration of CU and DU is merely an example; in practical applications, the functions of CU and DU can be configured as needed. For example, CU or DU can be configured to have more protocol layer functions, or to have only some protocol layer processing functions. For instance, some RLC layer functions and protocol layer functions above the RLC layer can be placed in the CU, while the remaining RLC layer functions and protocol layer functions below the RLC layer can be placed in the DU. Furthermore, the functions of CU or DU can be divided according to service type or other system requirements, such as by latency, placing functions that need to meet low latency requirements in the DU and functions that do not need to meet such latency requirements in the CU.

[0174] In one possible implementation, as shown in Figure 4, the DU is a logical node carrying the RLC layer, medium access control (MAC) layer, higher physical layer (Higher PHY) layer, and other functions. In some examples, the DU can control at least one RU. The DU connects to the RU through interfaces, which can be fronthaul interfaces. In some examples, the Higher PHY layer includes the PHY layer processing, such as forward error correction (FEC) encoding and decoding, scrambling, modulation, and demodulation.

[0175] In one possible implementation, as shown in Figure 4, the RU is a logical node carrying both lower physical layer (PHY) and radio frequency (RF) processing. In some examples, the RU can be a 3GPP transmission reception point (TRP), a remote radio head (RRH), or other similar entities. In some examples, the Low-PHY includes PHY processing functions such as Fast Fourier Transform (FFT), Inverse Fast Fourier Transform (IFFT), digital beamforming, and filtering. The RU communicates with one or more UEs via a radio link.

[0176] The DU and RU can be co-located or not. The DU and RU exchange control plane and user plane information via a fronthaul link through the Lower-Layer Split CUS-Plane (LLS-CUS) interface. LLS-CUS may include a Lower-Layer Split control (LLS-C) interface and a Lower-Layer Split user (LLS-U) interface, providing the control plane (C-Plane) and user plane (U-Plane) respectively. In some examples, the control plane (C-Plane) refers to real-time control between the DU and RU. The DU and RU exchange management information via a Lower-Layer Split management (LLS-M) interface on the fronthaul link; the management plane (M-Plane) refers to non-real-time management operations between the DU and RU.

[0177] DU and RU can cooperate to implement the functions of the PHY layer. A DU can be connected to one or more RUs. The functions of DU and RU can be configured in various ways depending on the design. For example, a DU can be configured to implement baseband functions, and an RU can be configured to implement mid-RF functions. Another example is that a DU can be configured to implement higher-level functions in the PHY layer, and an RU can be configured to implement lower-level functions in the PHY layer, or to implement both lower-level and RF functions. Higher-level functions in the physical layer can include a portion of the physical layer's functions that are closer to the MAC layer, while lower-level functions in the physical layer can include another portion of the physical layer's functions that are closer to the mid-RF side.

[0178] In different systems, CU (or CU-CP and CU-UP), DU, or RU may have different names, but those skilled in the art will understand their meaning. For example, in an ORAN system, CU can also be called O-CU (open CU), DU can also be called O-DU, CU-CP can also be called O-CU-CP, CU-UP can also be called O-CU-UP, and RU can also be called O-RU. For ease of description, this application uses CU, CU-CP, CU-UP, DU, and RU as examples.

[0179] It should be noted that network devices can be devices or apparatuses with chips, or devices or apparatuses with integrated circuits, or chips, chip systems, modules, processors, circuits, or control units in the devices or apparatuses shown above; this application does not impose any specific limitations. It should also be noted that in this application, the term "network device" can refer to the network device itself, or to chips, functional modules, or integrated circuits within the network device that implement the methods provided in this application; this application does not impose any specific limitations.

[0180] Network devices and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can also be deployed in the air on airplanes, balloons, and satellites. This application does not limit the scenario in which the network devices and terminal devices are located. Furthermore, terminal devices and network devices can be hardware devices, software functions running on dedicated hardware, or software functions running on general-purpose hardware, such as virtualization functions instantiated on a platform (e.g., a cloud platform), or entities that include dedicated or general-purpose hardware devices and software functions. This application does not limit the specific form of the terminal devices and network devices.

[0181] To facilitate a better understanding of the technical solution of this application, some related technologies involved in the technical solution of this application are introduced.

[0182] 1. Reference signal (RS).

[0183] Reference signals, also known as pilot signals, are essential in communication systems for transmitting and receiving data, obtaining system synchronization and feedback channel information, and estimating the uplink or downlink channel. Channel estimation refers to the process of reconstructing or recovering the received signal to compensate for signal distortion caused by channel fading and noise fading. It uses reference signals known to the transmitter and receiver to track the time and frequency domain changes of the channel. These reference signals are distributed across different resource elements (REs) in the time-frequency two-dimensional space within orthogonal frequency division multiplexing (OFDM) symbols, and have known amplitudes and phases.

[0184] At the physical layer, uplink communication can include the transmission of uplink physical channels and uplink signals. Uplink physical channels include the random access channel (PRACH), physical uplink control channel (PUCCH), and physical uplink shared channel (PUSCH), while uplink signals include the sounding reference signal (SRS), the PUCCH de-modulation reference signal (PUCCH-DMRS), the PUSCH demodulation reference signal (PUSCH-DMRS), the phase tracking reference signal (PTRS), and the uplink positioning reference signal (RS), among others.

[0185] At the physical layer, downlink communication can include the transmission of downlink physical channels and downlink signals. Downlink physical channels include the physical broadcast channel (PBCH), physical downlink control channel (PDCCH), and physical downlink shared channel (PDSCH), etc. Downlink signals include the primary synchronization signal (PSS) / secondary synchronization signal (SSS), physical downlink control channel demodulation reference signal (PDCCH-DMRS), physical downlink shared channel demodulation reference signal (PDSCH-DMRS), phase tracking reference signal (PTRS), channel state information reference signal (CSI-RS), cell reference signal (CRS), tracking reference signal (TRS), and positioning reference signal (RS), etc.

[0186] 2. Resources.

[0187] In the embodiments of this application, the resources can be a set of resources that a network device can configure for a terminal device, or resources in general.

[0188] The resource set may include at least one of the following: a channel state information (CSI) synchronization signal block (CSI-SSB) resource set, a CSI interference measurement (CSI-IM) resource set, a non-zero power-channel state information reference signal (NZP-CSI-RS) resource set, or a zero power-channel state information reference signal (ZP-CSI-RS) resource set.

[0189] In this application embodiment, a reference signal can correspond to a resource, and a reference signal can occupy a resource. A resource can be referred to as the resource of the reference signal. The resources in this application embodiment can include frequency domain resources and / or time domain resources, etc. Resources can also include at least one of the following: CSI-SSB resources, or CSI-IM resources, or NZP-CSI-RS resources, ZP-CSI-RS resources, sounding reference signal (SRS) resources, demodulation reference signal (DMRS) resources, PTRS resources, CRS resources, or TRS resources. In this application embodiment, the resource is described as a channel state information reference signal (CSI-RS) resource. CSI-RS resources are also written as channel state information reference signal (CSIRS) resources in this document. CSIRS resources can also be replaced with other resources. CSI-RS resources can also be understood as the resources occupied by CSI-RS, or can be replaced with the resources corresponding to CSI-RS, or replaced with the resources of CSI-RS.

[0190] 3. Detect reference signal.

[0191] SRS (Uplink Channel Sounding) is a signal transmitted by the terminal device and received by the network device. The transmission method of SRS includes the time-frequency resources, transmission beam, transmission power, etc., which are generally configured by the network device for the terminal device. Within the 3GPP related protocol framework, the network device can configure one or more SRS resource sets for the terminal device, and each SRS resource set contains one or more SRS resources.

[0192] Furthermore, in 3GPP related protocols, different SRS resource sets perform different functions. Generally, an SRS resource set can support four functions: {beamManagement, codebook, non-codebook, antennaSwitching}, or simply {BM, CB, NCB, AS}. Network devices can configure the usage of each SRS resource set through RRC signaling to inform terminal devices of the function of the corresponding SRS resource set. For example, when the purpose of an SRS resource set is antennaSwitching, the SRS corresponding to that SRS resource set is generally used to obtain complete uplink channel information. Assuming that in a TDD system, the channel has uplink reciprocity, meaning that the uplink and downlink channels are consistent, the SRS corresponding to that SRS resource can also obtain the downlink transmission channel (or downlink transmission precoding) through uplink channel measurement.

[0193] SRS can be used for uplink channel quality estimation and channel selection, calculating the uplink channel signal-to-interference-plus-noise ratio (SINR), and obtaining uplink channel coefficients. In TDD scenarios, where uplink and downlink channels are distinct, SRS can also be used to obtain downlink channel coefficients. Network devices can use the uplink / downlink channel coefficients estimated by SRS to determine the uplink / downlink precoding matrices, improving uplink / downlink transmission rates and increasing system capacity.

[0194] Network devices configure the time-frequency resource location occupied by SRS resources and the transmission method used to transmit SRS on those SRS resources via higher-layer signaling such as RRC signaling or medium access control-control element (MAC-CE) signaling. The configuration information for each SRS resource (e.g., higher-layer parameter SRS resource) includes at least the index number of the SRS resource, the time-frequency location information occupied by the SRS resource, and the SRS transmission port number, which can be determined by the configuration parameters shown in Table 1.1. The minimum probe bandwidth for SRS resources supported by NR is 4 physical resource blocks (PRBs), and the frequency hopping bandwidths of different SRS resources are integer multiples of each other, with the frequency hopping pattern having a tree structure.

[0195] Table 1.1

[0196] SRS resource configuration can be time-domain typed as periodic, semi-static, or aperiodic. The configuration information for periodic SRS resources includes the period (e.g., 2ms, 5ms, 10ms, etc.) and offset parameters. After the network device configures the SRS resource via RRC signaling, the terminal device will send SRS on the determined SRS resource within a specific periodic slot according to the configuration information. The configuration information for aperiodic SRS resources does not include the period and offset parameters, but only a time-domain offset parameter K for the downlink control information (DCI) signaling that triggers the SRS. When the terminal device receives DCI signaling at time n, and the signaling indicates that the SRS is triggered, it will send SRS on the corresponding SRS resource at time n+K, where K and n are positive integers.

[0197] In one possible implementation, different terminal devices can use the same time-domain resources (e.g., symbols) or frequency-domain resources (e.g., subcarriers) when sending SRS to a network device.

[0198] For example, different terminal devices may use different subcarriers corresponding to the same symbol to transmit SRS to the network device. A terminal device may not transmit SRS on every subcarrier corresponding to a symbol, but instead selects a specific set of subcarrier bundles based on the transmission comb value and transmits SRS on the subcarriers within that specific bundle. For instance, a terminal device can use the configured number of transmission combs and comb offsets to determine the specific subcarriers it uses to transmit SRS. For example, a comb number of 2 means each terminal device occupies 6 subcarriers per resource block (RB), a comb offset of 0 means the terminal device uses subcarriers 1, 3, 5, 7, 9, and 11 to transmit SRS, and a comb offset of 1 means the terminal device uses subcarriers 2, 4, 6, 8, 10, and 12 to transmit SRS.

[0199] When the number of combs is greater than 1, different terminal devices are allowed to use frequency division multiplexing within the same OFDM symbol. This means different terminal devices can use different subcarriers within the same RB (Radio Receptor) of the same OFDM symbol to transmit SRS. For example, a transmission comb spacing of 2 allows two groups of terminal devices to use frequency multiplexing with a single subcarrier offset between the two groups. A larger number of combs allows for a greater number of terminal devices to be multiplexed within the same OFDM symbol, but each terminal device has fewer resource elements (e.g., time-frequency resources) for SRS transmission. In this case, the quality of SRS measurements may be degraded.

[0200] For example, different terminal devices may use the same resource elements (e.g., the same time-domain resources and the same frequency-domain resources) to transmit SRS using different cyclically shifted base sequences. Each terminal device can be configured to transmit a base sequence with a specific cyclic shift (e.g., a Zadoff-Chu sequence) as SRS. That is, by selecting the base sequence and using different cyclic shifts to transmit each SRS, the SRS transmitted by different terminal devices are orthogonalized. For example, if the SRS transmitted by terminal device #1 using the first cyclic shift is orthogonal to the SRS transmitted by terminal device #2 using the second cyclic shift, then even if terminal device #1 and terminal device #2 use the same resource elements to transmit SRS, the interference between the SRS received by the network device from terminal device #1 and terminal device #2 remains very small.

[0201] The length of the base sequence can be determined based on the number of resource elements allocated by the SRS; for example, the length of the base sequence can be equal to the number of resource elements allocated by the SRS. The length of the base sequence can also be related to the number of resource blocks allocated to the SRS and the number of combs used, or it can be related to the number of usable cyclic shifts and the number of combs allocated by the SRS. For example, when the number of combs = 2, the maximum usable number of cyclic shifts = 8; when the number of combs = 4, the maximum usable number of cyclic shifts = 12; when the number of combs = 8, the maximum usable number of cyclic shifts = 6.

[0202] It should be understood that the aforementioned different cyclic shifts can also be allocated to multiple antenna ports of the same terminal device for transmitting SRS. For example, an SRS resource set of a terminal device may contain two SRS resources, such as a first SRS resource and a second SRS resource. The first SRS resource contains antenna port 1 and antenna port 2, and the second SRS resource contains antenna port 3 and antenna port 4. Four cyclic shifts can be configured to the corresponding four antenna ports of the terminal device for transmitting SRS.

[0203] In another possible implementation, the terminal device can transmit SRS by frequency hopping, meaning that multiple SRS transmissions from a single terminal device can switch between different frequency bands.

[0204] It should be understood that frequency hopping transmission refers to the fact that multiple SRS transmissions by a terminal device occupy different frequency bands within a specific bandwidth. For example, taking two SRS transmissions by a terminal device as an example, the terminal device transmits SRS on subband 1 within a specific bandwidth, and then switches from subband 1 to subband 2 within the same bandwidth, and transmits SRS again on subband 2.

[0205] For example, in the NR protocol, the uplink power of the SRS transmitted by the terminal device to the network device is limited, resulting in low accuracy of the channel state information obtained by the network device based on the received SRS reference signal. To improve the accuracy of channel estimation obtained by the network device based on SRS, the bandwidth of the SRS transmitted by the terminal device in a single transmission can be reduced, and the frequency power spectral density of the SRS can be increased, thereby ensuring the uplink power of a single SRS transmission and improving the accuracy of the channel state information obtained by the network device.

[0206] Referring to Figure 5, Figure 5 is a schematic diagram of frequency-hopping SRS transmission. Figure 5 shows a schematic diagram of single-bandwidth SRS transmission, two-subband frequency-hopping SRS transmission, and four-subband frequency-hopping SRS transmission. It can be seen that by transmitting SRS in a frequency-hopping manner, channel information at various frequency domain locations can be obtained.

[0207] For an SRS resource, the corresponding OFDM symbol l′ and antenna port p i The transmission sequence on is represented as

[0208] in, The length of the transmission sequence (or, the number of SRS resources or the number of subcarriers corresponding to the transmission sequence). α represents the number of symbols included in the SRS resource. i For cyclic shift, δ = log2(K) TC ), K TC The number of transmit combs configured for the transmission comb. This transmission sequence is mapped to frequency domain resources, and can be specifically represented as:

[0209] Where, β SRS N is the amplitude weighting factor used to adjust the transmission power of the SRS. ap The number of antenna ports configured in the SRS resource. This is the starting position of the frequency domain for the SRS resource.

[0210] The transmission sequence can be a ZC sequence (full name: Zadoff-Chu sequence). A ZC sequence is a pseudo-random signal with a low peak-to-average power ratio, good autocorrelation, and cross-correlation properties. For example, a reference signal passes through a ZC sequence. Generate. Among them, Wherein, the length N of the ZC sequence ZC ≤M. M is the number of subcarriers occupied by this SRS resource.

[0211] For example,

[0212] or,

[0213] The root sequence q of this ZC sequence is determined based on u and v. u is the sequence... The sequence group number, v is the sequence The serial number.

[0214] Terminal devices can transmit SRS using frequency hopping. The following describes the SRS frequency hopping scheme proposed in Release 15:

[0215] Network devices can configure SRS resources for terminal devices via RRC signaling. The RRC signaling specifies the number of ports included in the SRS resource, its frequency and time domain locations, usage period, comb teeth, cyclic shift value, and sequence identifier (ID). The frequency domain location of the SRS resource is determined by a set of frequency domain parameters in the RRC signaling (in existing 3GPP protocols, these parameters include n...). RRC n shift B SRS C SRS b hop Terminal devices can determine the bandwidth and starting position of the frequency domain occupied by SRS through these frequency domain parameters and the rules predetermined by the protocol.

[0216] Among them, C SRS B is the first parameter in the SRS frequency hopping parameters, corresponding to the maximum bandwidth; SRS This is the second parameter in the SRS frequency hopping parameters, corresponding to the bandwidth of a single hop. hop This is the third parameter in the SRS frequency hopping parameters, indicating whether SRS frequency hopping is performed (or indicating the range of SRS frequency hopping). shift This is the frequency domain shift value, used to indicate the offset available for SRS transmission relative to a reference point in the uplink system bandwidth (or, in other words, indicating the starting frequency domain position of the frequency hopping subband, i.e., adjusting the SRS allocation with respect to the reference point grid), n RRC The corresponding frequency domain position (or the frequency domain position of the starting frequency hopping subband, i.e., freqDomainPosition). It should be understood that any one or more of the above parameters can be set to a default value when not configured or specified. For example, the default value is 0.

[0217] In a time-domain symbol, the length of the transmission sequence corresponding to SRS satisfies:

[0218] Where, m SRS,b It can be combined with high-level parameter B SRS and high-level parameter C SRS Select from Table 2. It should be noted that if the network device has configured higher-layer parameter B in its frequency hopping parameters... SRS Then the higher-layer parameter B configured in the network device will be used. SRS Otherwise, the default parameter B is used. SRS Equals zero. The higher-level parameter B in the network device configuration. SRSIt equals 1, 2, or 3. High-level parameter C SRS This is configured in the frequency hopping parameters of the network device. For example, C SRS ∈{0,1,...,63}. K TC This refers to the number of combs.

[0219] The starting frequency domain position occupied by this SRS satisfy:

[0220] in,

[0221] This is the comb offset. n b This is the frequency domain location index of the SRS.

[0222] When b hop ≥B SRS At this time, the terminal device does not enable frequency hopping. That is, the terminal device transmits SRS in a non-frequency hopping manner. It should be understood that when transmitting SRS in a non-frequency hopping manner, the SRS transmitted by the terminal device in one transmission covers the entire configured bandwidth of the SRS resource.

[0223] When b hop SRS When this occurs, the terminal device enables frequency hopping. That is, the terminal device transmits SRS using frequency hopping. It should be understood that when transmitting SRS using frequency hopping, each SRS transmitted by the terminal device only covers a portion of the configured bandwidth of the SRS resource. However, multiple transmissions of SRS by the terminal device within one frequency hopping cycle can cover the entire configured bandwidth of the SRS resource.

[0224] The current SRS transmission method is as follows:

[0225] (1) If b hop ≥B SRS (Without frequency hopping), frequency domain position index n b The value is fixed (constant) and satisfies:

[0226] (2) If b hop SRS (Frequency hopping), frequency domain position index n b The value is fixed (constant) and satisfies:

[0227] Where, N b The results are given in Table 2.

[0228] n SRS The number of SRS transmissions specific to the terminal device (the terminal device's transmit count), n​​SRS satisfy:

[0229] The specific parameters and their values ​​involved in the above formulas can be found in Table 1.2 below:

[0230] Table 1.2

[0231] It should be noted that Figure 6 is used as an example for illustration. In Figure 6, one square represents 4 RBs in the frequency domain. For example, an active bandwidth part (BWP) includes 48 RBs, and the SRS occupies 12 RBs in one time domain symbol. Therefore, the terminal device can transmit the SRS on 4 time domain symbols through frequency hopping, with the bandwidth of each time domain symbol being one-quarter of the active BWP. In Figure 6, the small black squares represent the 4 RBs carrying the SRS. It should be noted that the 4 time domain symbols in Figure 6 can be 4 consecutive time domain symbols or 4 non-consecutive time domain symbols. This application embodiment does not limit this. The frequency hopping method shown in Figure 6 is only to illustrate the way the frequency domain resources of the SRS are occupied, and does not limit the way the time domain resources of the SRS are occupied.

[0232] Table 2

[0233] Based on Table 2 above, with C SRS For example, 18 corresponds to the row containing the bold text in Table 2. As you can see, in B... SRS When the values ​​are 0, 1, 2, and 3 respectively, the total bandwidth of the 72 RBs can be divided into a tree structure. SRS The bandwidth segmentation corresponding to different values ​​can be seen in Figure 7.

[0234] In R17, the terminal device transmits SRS within a portion of the bandwidth of a frequency-hopping subband. As shown in Figure 8, in frequency-hopping period 1, frequency-hopping subband 1 includes four RBs, and the terminal device transmits SRS in only one of these four RBs. The same applies to frequency-hopping subbands 2, 3, and 4. As shown in Figure 8, the RBs used for transmitting SRS in the same frequency-hopping subband can be different in different frequency-hopping periods. For example, as shown in Figure 8, the RBs used for transmitting SRS in the same frequency-hopping subband are different in frequency-hopping periods 1, 2, 3, and 4.

[0235] In R17, over a time-domain symbol, the transmission sequence corresponding to SRS can satisfy:

[0236] Among them, P FThis is the frequency domain scaling factor (FreqScalingFactor). For example, as shown in Figure 8, a frequency hopping subband includes four RBs, but SRS is transmitted only on one of these RBs. Therefore, P... F =4. Network devices can configure P for terminal devices. F For example, P F ∈{2,4}. Or P F The default value is 1.

[0237] The starting frequency domain position of SRS can satisfy:

[0238] in, The frequency hopping parameters for transmitting a portion of the bandwidth defined for R15 can be understood as the first frequency domain offset parameters. This refers to the partial bandwidth transmission frequency hopping parameter defined in R17, which can be understood as the second frequency domain offset parameter. For example, as shown in Figure 8, for frequency hopping period 1, different time domain symbols correspond to different frequency hopping sub-bands. On each time domain symbol, the starting time domain position of the corresponding frequency hopping sub-band is determined by... Determined. In each time-domain symbol, the bandwidth used for transmitting SRS in the corresponding frequency-hopping subband is determined by... Sure.

[0239] in, This is used to implement traversal between transmit combs, as shown in Figure 8. Multiple RBs within each frequency hopping subband are traversed during frequency hopping periods 1 to 4. As shown in Table 3, combined with K... TC and l′ determined

[0240] Table 3

[0241] k F ∈{0,1,…,P F `-1` is configured by the network device for the terminal device. If not configured, then `k`... F The default value is 0.

[0242] k hop It can be set to 0 by default, or determined using Table 4 and the following methods: in

[0243] Table 4

[0244] In R18, frequency hopping for the transmit comb is introduced, and partial bandwidth frequency hopping for transmission is introduced in the positioning process.

[0245] In this implementation, the starting frequency domain position of the SRS within a time domain symbol can satisfy:

[0246] in,

[0247] in Frequency hopping parameters for transmitting a portion of the bandwidth defined in R15. Frequency hopping parameters for transmitting a portion of the bandwidth defined in R17. To transmit comb frequency hopping parameters, Frequency hopping parameters are transmitted for a portion of the bandwidth defined for R18.

[0248] It should be noted that, within an active BWP, the SRS transmission method described in R18 can be used. The terminal device can transmit SRS in each of the multiple active BWPs included in the system BWP, following the SRS transmission method described in R18. This allows for measurement of the channel corresponding to the system BWP. For example, as shown in Figure 9, the terminal device transmits SRS across multiple active BWPs.

[0249] Send comb frequency hopping parameters satisfy:

[0250] in, and They are sets The (n+1)th element and the cardinality of the (n+1)th element in the set. It can be configured through higher-level parameters of the network device; otherwise... The high-level parameters include a length of K TC Given a bitmap, where the (n+1)th non-zero bit in the bitmap is the t-th bit in the bitmap, then...

[0251] The pseudo-random sequence c(i) is defined in the communication protocol, and the comb-off frequency hopping identifier is used. This can be configured via higher-level network device parameters. If the frequency hopping and repetition (hoppingWithRepetition) parameter in the higher-level parameters is set to repetition, then... Otherwise, l″ = l′.

[0252] For partial bandwidth frequency hopping transmission defined in R18, some parameters are specified as follows:

[0253] Provided in the high-level parameters,

[0254] Provided in the high-level parameters. N hop The number of frequency hopping frequencies configured.

[0255] n SRS The number of SRS transmissions specific to the terminal device (the terminal device's transmit count), n SRS satisfy:

[0256] Where s = 1 (default) or s = 2 (time division 2 symbol transmission).

[0257] The technical solution of this application is described below with reference to embodiments.

[0258] Figure 10 is a schematic diagram of an embodiment of the reference signal transmission method of this application. Referring to Figure 10, the method includes:

[0259] 1001. The terminal device determines the first sub-band corresponding to the first time domain unit group.

[0260] In this context, the first sub-band corresponding to the first time-domain unit group is a portion of the bandwidth of the second sub-band. The second sub-band is a portion of the bandwidth of the first frequency-hopping sub-band.

[0261] Optionally, the first time-domain unit group includes R time-domain symbols. R is a repetition factor. R is an integer greater than or equal to 1. The repetition factor is used to indicate the number of times the reference signal is repeatedly transmitted on the first sub-band corresponding to the first time-domain unit group.

[0262] For example, as shown in Figure 11A, in the R18 scheme, the frequency domain scaling factor P F =2, repetition factor R = 2. As shown in Figure 11A, subband A in frequency hopping subband 1 is used to transmit SRS. Since the repetition factor R = 2, time domain unit group 1 includes two time domain symbols, namely time domain symbol 1 and time domain symbol 2. Therefore, the terminal device transmits SRS on time domain symbol 1 and time domain symbol 2 respectively through subband A in frequency hopping subband 1. In the technical solution of this application, as shown in Figure 11B, the first time domain unit group is time domain unit group 1 in Figure 11B, and the repetition factor R = 1. Therefore, time domain unit group 1 includes time domain symbol 1. Frequency domain scaling factor P F=2, therefore, frequency hopping subband 1 includes two subbands, namely the second subband 1 and the second subband 2. These two subbands are each half the bandwidth of frequency hopping subband 1. The second subband 1 includes two subbands, namely the first subband 1 and the first subband 2. It can be seen that the first subband corresponding to time domain unit group 1 is the first subband 2. The terminal device transmits SRS through the first subband 2 corresponding to time domain unit group 1. That is, the shaded area on frequency hopping subband 1 at the time domain position occupied by time domain unit group 1 in Figure 11B is the time-frequency resource block formed by time domain unit group 1 and the first subband 2 corresponding to time domain unit group 1. The terminal device transmits SRS through the first subband 1 corresponding to time domain unit group 2. That is, the shaded area on frequency hopping subband 1 at the time domain position occupied by time domain unit group 2 in Figure 11B is the time-frequency resource block formed by time domain unit group 2 and the first subband 1 corresponding to time domain unit group 2.

[0263] It should be understood that the values ​​of the frequency domain scaling factor and repetition factor mentioned above in this application are for illustrative purposes only, and can be other values ​​in practice. For example, the frequency domain scaling factor can be other values, such as 4, 6, or 8. Or, the repetition factor R can be other values, such as 2, 3, 4, or 6.

[0264] For example, as shown in Figure 12A, in the R18 scheme, the frequency domain scaling factor P F =4, repetition factor R = 2. As shown in Figure 12A, subband B in frequency hopping subband 1 is used to transmit SRS. Since the repetition factor R = 2, time domain unit group 1 includes two time domain symbols, namely time domain symbol 1 and time domain symbol 2. Therefore, the terminal device transmits SRS on time domain symbol 1 and time domain symbol 2 respectively through subband A in frequency hopping subband 1. In the technical solution of this application, as shown in Figure 12B, the first time domain unit group is time domain unit group 1 shown in Figure 12B, and the repetition factor R = 1. Therefore, time domain unit group 1 includes time domain symbol 1. Frequency hopping subband 1 includes two subbands, namely second subband 1 and second subband 2. These two subbands are half the bandwidth of frequency hopping subband 1. Second subband 1 includes four subbands, namely first subband 1 to first subband 4. Second subband 2 includes four subbands, namely first subband 5 to first subband 8. It can be seen that the first subband corresponding to time domain unit group 1 is first subband 4. The terminal device transmits SRS through the first sub-band 4 corresponding to time domain unit group 1. That is, the shaded area on frequency hopping sub-band 1 at the time domain position occupied by time domain unit group 1 in Figure 11B represents the time-frequency resource block formed by time domain unit group 1 and its corresponding first sub-band 4. The first sub-band corresponding to time domain unit group 2 is first sub-band 8. The terminal device transmits SRS through the first sub-band 8 corresponding to time domain unit group 2. That is, the shaded area on frequency hopping sub-band 1 at the time domain position occupied by time domain unit group 2 in Figure 12B represents the time-frequency resource block formed by time domain unit group 2 and its corresponding first sub-band 8.

[0265] It should be understood that the values ​​of the frequency domain scaling factor and repetition factor mentioned above in this application are for illustrative purposes only, and can be other values ​​in practice. For example, the frequency domain scaling factor can be other values, such as 1, 2, 6, or 8. Or, the repetition factor R can be other values, such as 2, 3, 4, or 6.

[0266] Optionally, the R time-domain symbols are consecutive. R is an integer greater than or equal to 2. For example, as shown in Figure 11C, time-domain unit group 1 includes two time-domain symbols, time-domain symbol 1 and time-domain symbol 2. Time-domain symbol 1 and time-domain symbol 2 are two consecutive time-domain symbols. As another example, as shown in Figure 12C, time-domain unit group 1 includes two time-domain symbols, time-domain symbol 1 and time-domain symbol 2. Time-domain symbol 1 and time-domain symbol 2 are two consecutive time-domain symbols.

[0267] Optionally, the R time-domain symbols are not consecutive. For example, in these R time-domain symbols, the time-domain interval between any adjacent time-domain symbols is equal. For example, as shown in Figure 11D, time-domain unit group 1 includes time-domain symbol 1, time-domain symbol 3, and time-domain symbol 5. Time-domain symbol 1 and time-domain symbol 3 are adjacent time-domain symbols in the time-domain symbols included in time-domain unit group 1, and time-domain symbol 3 and time-domain symbol 5 are adjacent time-domain symbols in the time-domain symbols included in time-domain unit group 1. The time-domain interval between time-domain symbol 1 and time-domain symbol 3 is equal to the frequency-domain interval between time-domain symbol 3 and time-domain symbol 5. Time-domain unit group 2 includes time-domain symbol 2, time-domain symbol 4, and time-domain symbol 6. Time-domain symbol 2 and time-domain symbol 4 are adjacent time-domain symbols in the time-domain symbols included in time-domain unit group 2. Time-domain symbol 4 and time-domain symbol 6 are adjacent time-domain symbols in the time-domain symbols included in time-domain unit group 2. The time-domain interval between time-domain symbol 2 and time-domain symbol 4 is equal to the time-domain interval between time-domain symbol 4 and time-domain symbol 6.

[0268] The following describes two possible implementations of the first sub-band corresponding to the first time-domain unit group.

[0269] Implementation Method 1: The first sub-band corresponding to the first time-domain unit group is one of the Q sub-bands included in the second sub-band. Q is the cyclic frequency hopping factor. The cyclic frequency hopping factor is used for frequency hopping transmission of the Q sub-bands in the second sub-band.

[0270] It should be understood that the cyclic frequency hopping factor Q can also be called the spreading factor, splitting factor, frequency hopping parameter, second frequency domain scaling factor, partial bandwidth scaling factor, scaling factor, or scaling factor, etc., used to represent splitting the second sub-band into Q sub-bands (including the first sub-band corresponding to the first time domain unit group). Furthermore, the reference signals carried on each of the Q sub-bands occupy different time-domain resources, meaning that the reference signals carried on different sub-bands are transmitted at different times. This results in a higher power spectral density of the transmitted reference signal, and at the receiving end, the reference signals carried on the Q sub-bands can be jointly detected, thereby improving the signal-to-noise ratio and detection performance.

[0271] In one implementation, the cyclic frequency hopping factor can be indicated by configuration information or determined based on configuration information.

[0272] For example, as shown in Figure 11B, frequency hopping subband 1 includes two second subbands, namely second subband 1 and second subband 2. Since Q = 2, second subband 1 includes two subbands, namely first subband 1 and first subband 2. The first subband corresponding to time domain unit group 1 is first subband 2. The terminal device transmits SRS in first subband 2 corresponding to time domain unit group 1. Similarly, the first subband corresponding to time domain unit group 2 is first subband 1, and the terminal device can transmit SRS in first subband 1 corresponding to time domain unit group 2. This achieves cyclic frequency hopping transmission of Q subbands.

[0273] Optionally, each of the Q subbands has the same bandwidth. For example, as shown in Figure 11B, the second subband 1 includes two subbands, namely the first subband 1 and the first subband 2. The bandwidth of the first subband 1 is equal to the bandwidth of the first subband 2. For example, the first subband 1 occupies 1 RB, and the second subband 2 also occupies 1 RB.

[0274] In one possible implementation, the frequency domain positions occupied by the Q sub-bands are not the same. For example, as shown in Figure 11B, the second sub-band 1 includes two sub-bands, namely the first sub-band 1 and the first sub-band 2. The first sub-band 1 occupies RB3, and the first sub-band 2 occupies RB2. It can be seen that the frequency domain positions occupied by the first sub-band 1 are different from those occupied by the first sub-band 2.

[0275] Optionally, the Q subbands occupy consecutive frequency domain positions. For example, as shown in Figure 11B, the first subband 1 and the first subband 2 occupy two consecutive RBs. Alternatively, the frequency domain spacing between any two subbands in the Q subbands is equal. That is, the Q subbands are arranged at uniform intervals.

[0276] Optionally, the bandwidth of the second subband is greater than or equal to the total bandwidth of the Q subbands. For example, as shown in Figure 11B, the bandwidth of the second subband 1 is equal to the total bandwidth of the first subband 1 and the first subband 2.

[0277] Optionally, the second sub-band is the P included in the first frequency hopping sub-band. F One sub-band of a series of sub-bands. For example, as shown in Figure 11B, the first frequency-hopping sub-band is frequency-hopping sub-band 1. P F =2, therefore frequency hopping subband 1 includes two subbands, namely the second subband 1 and the second subband 2. For example, the second subband is either the second subband 1 or the second subband 2 as shown in Figure 11B.

[0278] Optional, P F Each subband in the subband has the same bandwidth. For example, as shown in Figure 11B, the bandwidth of the second subband 1 is equal to the bandwidth of the second subband 2.

[0279] In one possible implementation, the transmission sequence corresponding to the reference signal in a time-domain symbol is based on m SRS,b , K TC and P F It is certain. Among them, m SRS,b This indicates the number of frequency domain resource blocks occupied by the transmitted reference signal on a time domain symbol. K represents the number of subcarriers corresponding to each frequency domain resource block. TC P represents the number of combs. F This represents the frequency domain spread factor of higher-level parameters. For example, in a time-domain symbol, the transmission sequence corresponding to the reference signal satisfies:

[0280] In another possible implementation, the transmission sequence corresponding to the reference signal in a time-domain symbol is based on m SRS,b , K TC P F The value is determined by Q. Q is the cyclic frequency hopping factor, which can be configured through higher-layer parameters or physical layer signaling (e.g., RRC, MAC-CE, or downlink control information (DCI)), or it can be a default value, such as 1. It should be noted that media access control can also be called media access control. For example, in a time-domain symbol, the transmission sequence corresponding to the reference signal satisfies:

[0281] For example, as shown in Figure 11B, time-domain unit group 1 includes time-domain symbol 1, and the length of the reference signal transmitted on the first sub-band 2 corresponding to time-domain unit group 1 is... The transmission sequence corresponding to the reference signal includes One element, Each element is mapped to an RE in the second subband 2, as shown in Figure 11E. It should be understood that the corresponding comb (or comb interval) in this figure is 1. In practice, the comb (or comb interval) can be 2, 4, 6, 8, or 12.

[0282] Optionally, the starting frequency domain position of the reference signal It is based on Q, and At least one of them is determined. Furthermore, and At least one of them can also be based on k F And / or Q is determined.

[0283] For example, and Please refer to the relevant introduction in R18 above. and / or It is based on k F And / or Q is determined. The following describes one possible method for calculating the starting frequency domain position of the reference signal.

[0284] For example, the starting frequency domain position of the reference signal satisfy:

[0285] in,

[0286] or

[0287] Where, k q (l″′) is the subband cyclic frequency hopping parameter. q (l″′) can be determined based on the repetition factor R, the cyclic frequency hopping factor Q, and the frequency domain scaling factor P. F At least one parameter in is determined. For example, k q (l″′)=l″′. Or k q (l″′)=l″′×a+b, or k q (l″′) = (l″′ × a + b) mod Q. Where a and b are constants or determined according to the base station configuration. For example, a = Q. l″′ is related to the repetition factor R, the cyclic frequency hopping factor Q, and the frequency domain scaling factor P. F It is related to at least one parameter in it. For example, or or

[0288] k F ∈{0,1,…,PF `-1` is configured by the network device for the terminal device. If not configured, then `k`... F The default value is 0.

[0289] If the higher-level parameters are configured to enable RB frequency hopping (EnableStartRBHopping), then k hop This can be determined from Table 4, where,

[0290] If the higher-level parameters do not configure RB frequency hopping, then k hop =0.

[0291] For example, the starting frequency domain position of the reference signal satisfy:

[0292] in, and Please refer to the relevant introduction in R18 above. Determined by Q. For example, For example, For example,

[0293] in, Determined by Q. For example, For example, For example, Regarding l″′ and k q (l″′) Please refer to the aforementioned related introduction.

[0294] For example, the starting frequency domain position of the reference signal satisfy: in, and Please refer to the relevant introduction in R18 above. Specifically, Determined by Q. For example, For example, For example, Regarding l″′ and k q (l″′) Please refer to the aforementioned related introduction.

[0295] For example, the starting frequency domain position of the reference signal satisfy:

[0296] in, Please refer to the relevant introduction in R18 above. Determined by Q. For example, For example,

[0297] in, Determined by Q. For example, For example, For example,

[0298] For partial bandwidth frequency hopping transmission, some parameters are specified as follows:

[0299] Provided in the high-level parameters,

[0300] Provided in the high-level parameters. N hop The number of frequency hopping frequencies configured.

[0301] Send comb frequency hopping parameters or, about and Please refer to the relevant introduction above.

[0302] When b hop SRS hour,

[0303] Where, N b The results are given in Table 2.

[0304] in, And with N b The value of n is irrelevant. SRS The number of reference signals (e.g., SRS) transmitted by the terminal device (the terminal device's transmit count). SRS It can be determined based on at least one of s, R, Q, and l′.

[0305] Optionally, if the higher-level parameter resource type is configured as a non-periodic SRS resource, n SRS It can satisfy:

[0306] Where s = 1 or S = 2 (time division 2 symbol transmission). R is the repetition factor, and Q is the cyclic frequency hopping factor.

[0307] Optionally, if the high-level parameter resource type is configured as a periodic or semi-persistent SRS resource, n SRS satisfy: ​

[0308] Where s = 1 or s = 2 (time division 2 symbol transmission). R is the repetition factor, and Q is the cyclic frequency hopping factor. For other parameters, please refer to the relevant introduction above.

[0309] Implementation Method 2: The first sub-band corresponding to the first time-domain unit group is the P included in the second sub-band. F One of the subbands, P F This is the frequency domain scaling factor.

[0310] Optionally, in this implementation, P F The first sub-band constitutes a second sub-band, which is one of the Q sub-bands, forming a frequency-hopping sub-band. Each of the Q sub-bands carries a different time-domain reference signal, meaning the reference signals on different sub-bands are transmitted at different times. This results in a higher power spectral density of the transmitted reference signal, and at the receiver, the reference signals carried by the Q sub-bands can be jointly detected, thereby improving the signal-to-noise ratio and detection performance.

[0311] Similarly, Q is called the cyclic frequency hopping factor, which can be indicated by configuration information or determined based on configuration information.

[0312] For example, as shown in Figure 12B, frequency hopping subband 1 includes two subbands (i.e., Q subbands), namely the second subband 1 and the second subband 2. And P... F =4, therefore the second subband 1 includes four subbands (i.e., P). F The time-domain unit group (TDN) has four sub-bands, designated as sub-band 1 to sub-band 4. Sub-band 4 corresponds to time-domain unit group 1. The terminal device transmits SRS in sub-band 4 corresponding to time-domain unit group 1. Similarly, sub-band 8 corresponds to time-domain unit group 2, and the terminal device can transmit SRS in sub-band 8 corresponding to time-domain unit group 2. This enables cyclic frequency hopping transmission across the Q sub-bands.

[0313] Optional, P F Each subband has the same bandwidth. For example, as shown in Figure 12B, the second subband 1 includes four subbands, namely the first subband 1 to the first subband 4. Each of the first subbands 1 to the first subband 4 has the same bandwidth.

[0314] Optionally, the first frequency-hopping subband includes Q subbands, and the second subband is one of the Q subbands, where Q is the cyclic frequency-hopping factor. The cyclic frequency-hopping factor is used for frequency-hopping transmission of the subbands on the Q subbands used to transmit reference signals. For example, as shown in Figure 12B, Q = 2, so the frequency-hopping subband 1 includes two subbands, namely the second subband 1 and the second subband 2.

[0315] Optionally, the different sub-bands occupy different positions in the frequency domain among the Q sub-bands. For example, as shown in Figure 12B, the second sub-band 1 includes four sub-bands, namely the first sub-band 1 to the first sub-band 4. The first sub-band 1 to the first sub-band 4 are located in different positions in the frequency domain.

[0316] Optionally, the frequency domain positions occupied by different sub-bands in the Q sub-bands are continuous. For example, as shown in Figure 12B, the second sub-band 1 includes four sub-bands, namely the first sub-band 1 to the first sub-band 4. The frequency domain positions of the first sub-bands 1 to 4 are continuous.

[0317] In one possible implementation, the transmission sequence corresponding to the reference signal is based on m SRS,b , K TC and P F It is certain. Among them, m SRS,b This indicates the number of frequency domain resource blocks occupied by the transmitted reference signal on a time domain symbol. K represents the number of subcarriers corresponding to each frequency domain resource block. TC P represents the number of combs. F This represents the frequency domain spread factor of higher-level parameters. For example, in a time-domain symbol, the transmission sequence corresponding to the reference signal satisfies:

[0318] In another possible implementation, the transmission sequence corresponding to the reference signal in a time-domain symbol is based on m SRS,b , K TC P F This is determined by Q. Q is the cyclic frequency hopping factor, which can be configured through higher-layer parameters or physical layer signaling (e.g., RRC, MAC-CE, or DCI), or default to a preset value. For example, the preset value is 1. For example, in one time-domain symbol, the transmission sequence corresponding to the reference signal satisfies:

[0319] Optionally, the starting frequency domain position of the reference signal It is based on Q, and At least one of them is determined. Furthermore, and At least one of them can also be based on k F And / or Q is determined.

[0320] For example, and Please refer to the relevant introduction above. and / or It is based on k FAnd / or Q is determined. The following describes one possible implementation of the starting frequency domain position of the reference signal.

[0321] For example, the starting frequency domain position of the reference signal satisfy:

[0322] in,

[0323] or Where, k q (l″′) is the subband cyclic frequency hopping parameter. q (l″′) can be determined based on the repetition factor R, the cyclic frequency hopping factor Q, and the frequency domain scaling factor P. F At least one parameter in is determined. For example, k q (l″′) = l″′. Or, k q (l″′)=l″′P F Or k q (l″′)=l″′×a+b, or k q (l″′) = (l″′ × a + b) mod Q. Where a and b are constants or determined according to the base station configuration. For example, a = Q. For another example, a = Q. l″′ is related to the repetition factor R, the cyclic frequency hopping factor Q, and the frequency domain scaling factor P. F It is related to at least one parameter in it. For example, or or

[0324] k F ∈{0,1,…,P F `-1` is configured by the network device for the terminal device. If not configured, then `k`... F The default value is 0.

[0325] If the higher-level parameters are configured to enable RB frequency hopping (EnableStartRBHopping), then k hop This can be determined from Table 4, where, Otherwise k hop =0.

[0326] For example, the starting frequency domain position of the reference signal satisfy:

[0327] in, and Please refer to the relevant introduction in R18 above. Determined by Q. For example, For example, For example,

[0328] in, Determined by Q. For example, For example, For example,

[0329] For example, the starting frequency domain position of the reference signal satisfy: in, and Please refer to the relevant introduction in R18 above. Determined by Q. For example, For example, For example,

[0330] For example, the starting frequency domain position of the reference signal satisfy:

[0331] in, Please refer to the relevant introduction in R18 above. Determined by Q. For example, For example,

[0332] in, Determined by Q. For example, For example, For example,

[0333] For partial bandwidth frequency hopping transmission, some parameters are specified as follows:

[0334] Provided in the high-level parameters,

[0335] Provided in the high-level parameters. N hop The number of frequency hopping frequencies configured.

[0336] Send comb frequency hopping parameters or, about and Please refer to the relevant introduction above.

[0337] When b hop SRS hour,

[0338] Where, N b The results are given in Table 2.

[0339] in, And with N b The value of n is irrelevant. SRS The number of reference signals (e.g., SRS) transmitted by the terminal device (the terminal device's transmit count). SRS It can be determined based on at least one of s, R, Q, and l′.

[0340] Optionally, if the higher-level parameter resource type is configured as a non-periodic SRS resource, n SRS It can satisfy:

[0341] Where s = 1 or S = 2 (time division 2 symbol transmission). R is the repetition factor, and Q is the cyclic frequency hopping factor.

[0342] Optionally, if the high-level parameter resource type is configured as a periodic or semi-persistent SRS resource, n SRS satisfy:

[0343] Where s = 1 or s = 2 (time division 2 symbol transmission). R is the repetition factor, and Q is the cyclic frequency hopping factor. For other parameters, please refer to the relevant introduction above.

[0344] 1002. The terminal device transmits a reference signal through the first sub-band corresponding to the first time domain unit group in at least one first time domain unit group.

[0345] Optionally, the first time-domain unit group corresponds to the first phase compensation value. The terminal device compensates for the phase of the reference signal using the first phase compensation value.

[0346] The following describes some methods for calculating the first phase compensation value. Other calculation methods are still applicable to this application, and this application does not limit them in any specific way.

[0347] I. First Phase Compensation Value ​Where α is the cyclic shift value, and t0 is the first time-domain unit group (for example, t0 is the local frequency hopping index of the first time-domain unit group, which can take values ​​of 0, 1, ..., Q-1. The local frequency hopping index of the first time-domain unit group refers to the frequency hopping index corresponding to the first time-domain unit group in the number of frequency hopping times corresponding to the Q time-domain unit groups (described later). This represents the bandwidth of the first subband corresponding to the first time-domain unit group.

[0348] II. First Phase Compensation Value Where α is the cyclic shift value, f(t0) = t0, or f(t0) = (t0 + 1) mod H, or f(t0) = (at0 + 1) mod H, where mod represents the remainder, and a is an integer or a prime number, such as 3, 5, 7, 11, 13, 17, 19, 23, etc. Let t0 be the bandwidth of the first subband corresponding to the first time-domain unit group, and t0 be the local frequency hopping index of the time-domain unit in the first time-domain unit group. Optionally, H is the phase compensation period corresponding to the Q time-domain unit groups (described later). The phase compensation period corresponding to the Q time-domain unit groups is either the number of frequency hopping times of the reference signal corresponding to the Q time-domain unit groups, or the total duration of the Q time-domain unit groups, or the number of times or opportunities to transmit the reference signal on the Q time-domain unit groups.

[0349] The above implementation method can also have other representations, which are not limited in this application.

[0350] The reference signal is generated based on the first sequence. The first sequence can be represented by formula 1, formula 2, formula 3, formula 4, formula 5, or formula 6:

[0351] Where t0 is the local frequency hopping index of the first time-domain unit group, α is the cyclic shift value, p(t0) is the first phase compensation value, and m0 is the order of the subcarriers in the first sub-band corresponding to the first time-domain unit group.

[0352] Specifically, p(α,t0) can be represented as p(α,t0) = α × (m0 + f(t0)) or p(α,t0) = α × (m0 + N0(t0)). Please refer to the previous sections for information on f(t0), α, and m0. N0(t0) is determined based on the starting frequency domain position of the first sub-band, or N0(t0) is... The sum of any one or any number of items in the set.

[0353] For example, as shown in Table 5 below, the number of subcarriers in the first subband corresponding to the first time-domain unit group is: There are subcarriers. Therefore, the value of m0 is... For the first subcarrier in the first subband corresponding to the first time-domain unit group, m0 = 0. For the second subcarrier in the first subband corresponding to the first time-domain unit group, m0 = 1, and so on. or r u,v (m0)=r q [m0],N ZC for The length q is determined by u and v, where u is... The sequence group number, v is The sequence number. N0(t0) is the starting frequency domain position of the subcarrier in the first sub-band corresponding to the first time domain unit group.

[0354] Table 5

[0355] In Table 5 above, the second time-domain unit group can be understood as a time-domain unit group following the first time-domain unit group. For example, as shown in Figure 11B, the first time-domain unit group is time-domain unit group 1, and the second time-domain unit group is time-domain unit 2. The second time-domain unit group has a corresponding second phase compensation value, and the terminal device can use the second phase compensation value corresponding to the second time-domain unit group to perform phase compensation on the reference signal on the second time-domain unit group. This enables the phase association of reference signals transmitted on multiple time-domain unit groups to be established. This allows the receiver to jointly receive reference signals transmitted on multiple time-domain unit groups and perform channel estimation using the reference signals transmitted on multiple time-domain unit groups, thereby improving the channel estimation accuracy and performance. For example, the phase of the reference signal transmitted on the first sub-band corresponding to the first time-domain unit group is continuous with the phase of the reference signal transmitted on the first sub-band corresponding to the second time-domain unit group. In other words, the phase between the phase of the last subcarrier occupied by the first sub-band corresponding to the first time-domain unit group and the phase of the first subcarrier occupied by the first sub-band corresponding to the second time-domain unit group is α+2eπ, where e is an integer.

[0356] For example, as shown in Table 5, the first sub-band occupancy corresponding to the first time domain unit group The first subband corresponding to the second time-domain unit group occupies one subcarrier. There are 1 subcarrier. The starting frequency domain position occupied by the reference signal transmitted on the first sub-band corresponding to the first time-domain unit group is N0(t0). As shown in Table 5, the sequence of reference signals used to generate the reference signal carried on the first subcarrier occupied by the first sub-band corresponding to the first time-domain unit group is as follows: The reference signal sequence used to generate the signal carried on the last subcarrier of the first subband corresponding to the first time domain unit group is as follows: The sequence used to generate the reference signal on the first subcarrier occupied by the first subband corresponding to the second time-domain unit group is as follows: or, in, It is r u,v (0) conjugate, yes The conjugate of the reference signal transmitted on the first sub-band corresponding to the first time-domain unit group is α. That is, the phase difference between the phase of the reference signal transmitted on the last subcarrier occupied by the first sub-band corresponding to the first time-domain unit group and the phase of the reference signal transmitted on the first sub-band occupied by the first sub-band corresponding to the second time-domain unit group is α. t0 is the local frequency hopping index of the time-domain unit in the first time-domain unit group, and t1 is the local frequency hopping index of the time-domain unit in the second time-domain unit group. This represents the bandwidth occupied by the first sub-band corresponding to the first time-domain unit group. α represents the bandwidth occupied by the first subband corresponding to the second time-domain unit group. α is the cyclic shift value. The local frequency hopping index of the time-domain units in the second time-domain unit group is similar to that in the first time-domain unit group; for details, please refer to the aforementioned introduction to the local frequency hopping index of the time-domain units in the first time-domain unit group.

[0357] It should be noted that the phase difference between the phase on the last subcarrier occupied by the first subband corresponding to the first time domain unit group and the phase on the first subcarrier occupied by the first subband corresponding to the second time domain unit group can also be other values, and this application does not limit them.

[0358] It should be noted that, in Table 5 above, the starting frequency domain position occupied by the reference signal transmitted in the first sub-band corresponding to the first time-domain unit group is denoted as N0(t0). The starting frequency domain position occupied by the reference signal transmitted in the first sub-band corresponding to the second time-domain unit group is denoted as N1(t1). That is, the above... It equals N1(t1).

[0359] It should be noted that, optionally, the phase difference between the phases of the reference signals on any two adjacent subcarriers occupied by the first subband corresponding to the first time-domain unit group can be α + 2eπ, where e is an integer. For example, as shown in Table 5, the sequence used to generate the reference signal on the first subcarrier occupied by the first subband corresponding to the first time-domain unit group is as follows: The sequence used to generate the reference signal on the second subcarrier occupied by the first subband corresponding to the first time-domain unit group is as follows: Optionally, the phase difference between the phases of the reference signals on any two adjacent subcarriers occupied by the first subband corresponding to the second time-domain unit group can be α. As shown in Table 5, the sequence used to generate the reference signal on the first subcarrier occupied by the first subband corresponding to the second time-domain unit group is as follows: The sequence used to generate the reference signal on the second subcarrier occupied by the first subband corresponding to the second time-domain unit group is as follows:

[0360] It should be noted that the first and second time-domain unit groups can be either consecutive or non-consecutive. For example, the first time-domain unit group may include time-domain symbol 1 and time-domain symbol 2. That is, the first and second time-domain unit groups are consecutive. Therefore, the reference signal transmitted in the first and second time-domain unit groups can be understood as a two-hop reference signal. Since the phases of the reference signals transmitted in the first and second time-domain unit groups are continuous, network devices can use both signals for channel estimation.

[0361] It should be noted that step 1002 describes the technical solution of this application using the example of the terminal device transmitting a reference signal in one of the sub-bands of the second sub-band. In practical applications, the terminal device can transmit reference signals in more sub-bands of the second sub-band, and this application does not limit the specific implementation.

[0362] Optionally, network devices can configure a cyclic frequency hopping factor Q for terminal devices using configuration information.

[0363] Optionally, the embodiment shown in FIG10 further includes step 1003. Step 1003 may be performed after step 1002.

[0364] It should be noted that different methods and embodiments in this application can be combined arbitrarily, and the order of implementation steps can be adjusted to form new embodiments.

[0365] 1003. The terminal device transmits reference signals through the sub-bands corresponding to the Q-1 time domain unit groups on the Q-1 time domain unit groups.

[0366] Here, the Q-1 time-domain unit groups are the time-domain unit groups other than the first time-domain unit group among the Q time-domain unit groups corresponding to the Q sub-bands. Optionally, the different time-domain unit groups occupy different time-domain positions.

[0367] The following section describes the Q-1 time-domain unit group in conjunction with the two implementation methods shown in step 1002 above.

[0368] Implementation Method 1: The second sub-band comprises Q sub-bands, and the first sub-band corresponding to the first time-domain unit group is one of the Q sub-bands. The Q sub-bands correspond to Q time-domain unit groups. The Q-1 time-domain unit groups are the time-domain unit groups other than the first time-domain unit group among the Q time-domain unit groups.

[0369] For example, as shown in Figure 11B, the second subband 1 includes two subbands: the first subband 1 and the first subband 2. The first subband 2 corresponds to time domain unit group 1, and the first subband 1 corresponds to time domain unit group 2. That is, the terminal device can transmit SRS through the first subband 2 on time domain unit group 1, and transmit SRS through the first subband 1 on time domain unit group 2. This enables frequency hopping transmission of Q subbands.

[0370] Implementation Method 2: The first frequency-hopping sub-band includes Q sub-bands, and the second sub-band is one of the Q sub-bands. The Q sub-bands correspond to Q time-domain unit groups. The Q-1 time-domain unit groups are the time-domain unit groups other than the first time-domain unit group among the Q time-domain unit groups.

[0371] For example, as shown in Figure 12B, the first frequency-hopping subband is frequency-hopping subband 1, which includes a second subband 1 and a second subband 2. Second subband 1 corresponds to time-domain unit group 1, and second subband 2 corresponds to time-domain unit group 2. The terminal device can transmit SRS on time-domain unit group 1 through the first subband 4 in second subband 1, and on time-domain unit group 2 through the first subband 8 in second subband 2. This achieves frequency-hopping transmission of the subbands used for transmitting SRS among the Q subbands.

[0372] The aforementioned first frequency-hopping subband is a frequency-hopping subband within a first bandwidth. The first bandwidth includes M frequency-hopping subbands, where M is an integer greater than or equal to 2. Optionally, the first bandwidth is the bandwidth of the communication system, the configured SRS bandwidth, or the bandwidth configured by the network device for the terminal device. For example, as shown in Figure 11B, the first bandwidth includes four frequency-hopping subbands, and the first frequency-hopping subband is frequency-hopping subband 1. The above illustrates the transmission method of the terminal device transmitting SRS on the first frequency-hopping subband. The transmission method for other frequency-hopping subbands is similar and will not be elaborated here. The terminal device can transmit SRS on multiple frequency-hopping subbands to achieve full-band frequency hopping.

[0373] 1004. Network equipment performs channel measurements.

[0374] In one possible implementation, the network device can perform channel estimation by combining the reference signals received in Q time-domain unit groups. This achieves channel estimation for the first frequency-hopping subband. Optionally, the reference signals transmitted in the Q time-domain unit groups are obtained through phase compensation values. The phases of the reference signals transmitted in the Q time-domain unit groups are continuous. The network device's combined use of the reference signals from the Q time-domain unit groups for channel estimation helps improve channel estimation accuracy and performance.

[0375] In this embodiment, the terminal device determines a first sub-band corresponding to a first time-domain unit group. The first sub-band corresponding to the first time-domain unit group is a portion of the bandwidth of a second sub-band. The second sub-band is a portion of the bandwidth of a first frequency-hopping sub-band. Then, the terminal device transmits a reference signal through the first sub-band corresponding to the first time-domain unit group at at least one first time-domain unit in the first time-domain unit group. Therefore, it can be seen that the first sub-band corresponding to the first time-domain unit group is a portion of the bandwidth of the second sub-band. The second sub-band is a portion of the bandwidth of the first frequency-hopping sub-band. This further reduces the sub-band through which the terminal device transmits the reference signal. This is beneficial for concentrating terminal power onto the first sub-band corresponding to the first time-domain unit group, which helps improve channel estimation accuracy and performance.

[0376] The communication device provided in this application is described below.

[0377] Figure 13 is a schematic diagram of a communication device according to an embodiment of this application. Referring to Figure 13, the communication device can be used to execute the process performed by the terminal device or network device in the embodiment shown in Figure 10. For details, please refer to the relevant descriptions in the foregoing method embodiments.

[0378] The communication device 1300 includes a transceiver module 1301 and a processing module 1302.

[0379] The processing module 1302 is used for data processing. The transceiver module 1301 can implement the corresponding communication functions. The transceiver module 1301 can also be called a communication interface or a communication module.

[0380] Optionally, the communication device 1300 may further include a storage module, which can be used to store program code, program instructions and / or data. The processing module 1302 can read the instructions and / or data in the storage module so that the communication device 1300 can implement the aforementioned method embodiments.

[0381] In one possible implementation, the communication device 1300 can be used to perform the actions performed by the terminal device in the embodiment shown in FIG10. For example, it can be the terminal device, a communication module within the terminal device, or a circuit or chip within the terminal device responsible for communication functions. The communication device 1300 can be the terminal device or a component configurable within the terminal device. The processing module 1302 is used to perform processing-related operations on the terminal device side in the embodiment shown in FIG10. The transceiver module 1301 is used to perform receiving-related operations on the terminal device side in the embodiment shown in FIG10.

[0382] In another possible implementation, the communication device 1300 can be used to perform the actions performed by the network device in the embodiment shown in FIG10. For example, it can be a communication module in the network device, or a circuit or chip in the network device responsible for communication functions. The communication device 1300 can be a network device or a component configurable in the network device. The processing module 1302 is used to perform processing-related operations on the network device side in the embodiment shown in FIG10. The transceiver module 1301 is used to perform receiving-related operations on the network device side in the embodiment shown in FIG10.

[0383] Optionally, the transceiver module 1301 may include a sending module and a receiving module. The sending module is used to perform the sending operation in the embodiment shown in FIG10. The receiving module is used to perform the receiving operation in the embodiment shown in FIG10.

[0384] It should be noted that the communication device 1300 may include a transmitting module but not a receiving module. Alternatively, the communication device 1300 may include a receiving module but not a transmitting module. Specifically, it depends on whether the above-described scheme executed by the communication device 1300 includes both transmitting and receiving actions. For example, the communication device 1300 is used to execute the actions performed by the terminal device in the embodiment shown in FIG10. For details, please refer to the relevant descriptions in the embodiment shown in FIG10; these will not be elaborated upon here.

[0385] For example, the communication device 1300 is used to execute the following scheme:

[0386] Processing module 1302 is used to determine the first sub-band corresponding to the first time domain unit group, wherein the first sub-band corresponding to the first time domain unit group is a portion of the bandwidth in the second sub-band, and the second sub-band is a portion of the bandwidth of the first frequency hopping sub-band;

[0387] The transceiver module 1301 is used to transmit a reference signal through a first sub-band corresponding to the first time domain unit group on at least one first time domain unit in the first time domain unit group.

[0388] For example, the communication device 1300 is used to execute the following scheme:

[0389] Processing module 1302 is used to determine the first sub-band corresponding to the first time domain unit group, wherein the first sub-band corresponding to the first time domain unit group is a portion of the bandwidth in the second sub-band, and the second sub-band is a portion of the bandwidth of the first frequency hopping sub-band;

[0390] The transceiver module 1301 is used to receive a reference signal through a first sub-band corresponding to the first time domain unit group at at least one first time domain unit in the first time domain unit group.

[0391] For other implementation methods, please refer to the relevant descriptions in the embodiments shown in Figure 10 above.

[0392] It should be understood that the specific procedures for each module to perform the above-mentioned corresponding processes have been described in detail in the above method embodiments, and will not be repeated here for the sake of brevity.

[0393] Optionally, when the communication device 1300 is a terminal device or a communication module within a terminal device, the processing module 1302 in the above embodiments can be implemented by at least one processor or processor-related circuitry. Specifically, the processor may include a modem chip, or a system-on-a-chip (SoC) chip containing a modem core, or a system-in-package (SIP) chip. The transceiver module 1301 can be implemented by a transceiver or transceiver-related circuitry. The transceiver module 1301 may also be referred to as a communication module or communication interface. The storage module can be implemented by at least one memory.

[0394] Optionally, when the communication device 1300 is a circuit or chip in a terminal device responsible for communication functions, such as a modem chip or a SoC chip or SIP chip containing a modem core, the function of the processing module 1302 can be implemented by a circuit system in the aforementioned chip that includes one or more processors or processing cores. The function of the transceiver module 1301 can be implemented by the interface circuit or data transceiver circuit on the aforementioned chip.

[0395] This application embodiment also provides a communication device 1400. Referring to FIG14, the communication device 1400 includes a processor 1410, which is coupled to a memory 1420. The memory 1420 is used to store computer programs or instructions and / or data. The processor 1410 is used to execute the computer programs or instructions and / or data stored in the memory 1420, causing the methods in the above method embodiments to be executed. The communication device 1400 is used to implement the operations performed by the terminal device or network device in the above method embodiments.

[0396] Optionally, the communication device 1400 may include one or more processors 1410.

[0397] Optionally, as shown in FIG14, the communication device 1400 may also include a memory 1420.

[0398] Optionally, the communication device 1400 may include one or more memory 1420.

[0399] Optionally, the memory 1420 can be integrated with the processor 1410 or set separately.

[0400] Optionally, as shown in FIG14, the communication device 1400 may further include a transceiver 1430 for receiving and / or transmitting signals. For example, the processor 1410 is used to control the transceiver 1430 to receive and / or transmit signals.

[0401] This application also provides a communication device 1500, which can be a terminal device, a processor in the terminal device, or a chip. The communication device 1500 can be used to perform the operations performed by the terminal device in the above method embodiments.

[0402] When the communication device 1500 is a terminal device, Figure 15 shows a simplified structural diagram of the terminal device. As shown in Figure 15, the terminal device includes a processor, a memory, and a transceiver. The memory can store computer program code, and the transceiver includes a transmitter 1531, a receiver 1532, radio frequency circuitry (not shown in the figure), an antenna 1533, and input / output devices (not shown in the figure).

[0403] The processor is mainly used to process communication protocols and communication data; control terminal devices; execute software programs; and process data from software programs.

[0404] Memory is mainly used to store software programs and data.

[0405] Radio frequency (RF) circuits are mainly used for the conversion between baseband signals and RF signals, as well as for the processing of RF signals.

[0406] Antennas are primarily used for transmitting and receiving radio frequency signals in the form of electromagnetic waves.

[0407] Input / output devices can include touchscreens, displays, or keyboards. They are primarily used to receive user input and output data to the user. It should be noted that some types of terminal devices may not have input / output devices.

[0408] When data needs to be transmitted, the processor performs baseband processing on the data to be transmitted and outputs a baseband signal to the radio frequency (RF) circuit. The RF circuit then processes the baseband signal and transmits it outwards via an antenna as electromagnetic waves. When data is sent to the terminal device, the RF circuit receives the RF signal through the antenna. The RF circuit converts the RF signal back into a baseband signal and outputs it to the processor. The processor converts the baseband signal back into data and processes the data. For ease of explanation, Figure 15 only shows one memory, processor, and transceiver. In actual terminal device products, there may be one or more processors and one or more memories. Memory can also be called storage medium or storage device, etc. Memory can be independent of the processor or integrated with the processor; this embodiment does not limit this.

[0409] In this embodiment, the antenna and radio frequency circuit with transceiver function can be regarded as the transceiver module of the terminal device, and the processor with processing function can be regarded as the processing module of the terminal device.

[0410] As shown in Figure 15, the terminal device includes a processor 1510, a memory 1520, and a transceiver 1530. The processor 1510 can also be referred to as a processing unit, processing board, processing module, or processing device, etc. The transceiver 1530 can also be referred to as a transceiver unit, transceiver, or transceiver device, etc.

[0411] Optionally, the device in transceiver 1530 used to implement the receiving function can be considered a receiving module, and the device in transceiver 1530 used to implement the transmitting function can be considered a transmitting module. That is, transceiver 1530 includes a receiver and a transmitter. A transceiver may also be called a transceiver unit, transceiver module, or transceiver circuit, etc. A receiver may also be called a receiver unit, receiving module, or receiving circuit, etc. A transmitter may also be called a transmitter, transmitting module, or transmitting circuit, etc.

[0412] The processor 1510 is used to execute the processing actions on the terminal device side in the embodiment shown in FIG10. The transceiver 1530 is used to execute the transmission and reception actions on the terminal device side in the embodiment shown in FIG10.

[0413] It should be understood that Figure 15 is merely an example and not a limitation, and the terminal device described above, including the transceiver module and the processing module, may not depend on the structure shown in Figures 13, 14 or 15.

[0414] When the communication device 1500 is a chip, the chip includes a processor and a transceiver. The processor can be a processing module integrated on the chip, a microprocessor, or an integrated circuit. The transceiver can be an input / output circuit or a communication interface. In the above method embodiments, the sending operation of the terminal device can be understood as the output of the chip, and the receiving operation of the terminal device in the above method embodiments can be understood as the input of the chip.

[0415] Optionally, the communication device 1500 may also include a memory, which may be a memory built into the chip or a memory connected to the chip.

[0416] This application also provides a communication device 1600, which can be a network device or a chip. The communication device 1600 can be used to perform the operations performed by the network device in the embodiment shown in FIG10 above.

[0417] When the communication device 1600 is a network device, such as a base station, Figure 16 shows a simplified schematic diagram of a base station structure. The base station includes parts 1610, 1620, and 1630.

[0418] The 1610 section is mainly used for baseband processing and base station control; the 1610 section is usually the control center of the base station, which can be called a processor, and is used to control the base station to perform the processing operations on the network device side in the above method embodiments.

[0419] Section 1620 is primarily used to store computer program code and data.

[0420] Section 1630 is primarily used for transmitting and receiving radio frequency (RF) signals, as well as converting RF signals to baseband signals. Section 1630 is commonly referred to as a transceiver module, transceiver, transceiver circuit, or transceiver unit. The transceiver module of section 1630, also called a transceiver or transceiver unit, includes antenna 1633 and RF circuitry (not shown in the figure), where the RF circuitry is mainly used for RF processing. Optionally, the device in section 1630 that performs the receiving function can be considered a receiver, and the device that performs the transmitting function can be considered a transmitter; that is, section 1630 includes receiver 1632 and transmitter 1631. The receiver can also be called a receiving module, receiver circuit, or receiving circuit, and the transmitter can be called a transmitting module, transmitter, or transmitting circuit.

[0421] Sections 1610 and 1620 may include one or more circuit boards, each of which may include one or more processors and one or more memories. The processors are used to read and execute programs from the memories to implement baseband processing functions and control the base station. If multiple circuit boards exist, they can be interconnected to enhance processing capabilities. As an alternative implementation, multiple circuit boards may share one or more processors, multiple circuit boards may share one or more memories, or multiple circuit boards may simultaneously share one or more processors.

[0422] For example, in one implementation, the transceiver module of section 1630 is used to execute the transceiver-related processes performed by the network device in the embodiment shown in FIG10. The processor of section 1610 is used to execute the processing-related processes performed by the network device in the embodiment shown in FIG10.

[0423] It should be understood that Figure 16 is merely an example and not a limitation, and the network devices described above, including processors, memory, and transceivers, may not depend on the structures shown in Figures 13, 14, or 16.

[0424] When the communication device 1600 is a chip, the chip includes a processor and a transceiver. The processor is an integrated processor, microprocessor, or integrated circuit on the chip. The transceiver can be an input / output circuit or a communication interface. In the above method embodiments, the transmitting operation of the network device can be understood as the output of the chip, and the receiving operation of the network device in the above method embodiments can be understood as the input of the chip.

[0425] Optionally, the communication device 1600 may also include a memory, which may be a memory built into the chip or a memory connected to the chip.

[0426] This application also provides a computer-readable storage medium having stored thereon a computer program or instructions for implementing the methods executed by a terminal device or a network device in the above method embodiments.

[0427] For example, when the computer program or instructions are executed by the computer, the computer can implement the method executed by the terminal device or network device in the above method embodiments.

[0428] This application also provides a computer program product containing instructions that, when executed by a computer, cause the computer to perform the method described in the above method embodiments, which is executed by a terminal device or a network device.

[0429] This application also provides a communication system, which includes a terminal device and a network device. The terminal device is used to perform some or all of the operations performed by the terminal device in the embodiment shown in FIG10 above, and the network device is used to perform some or all of the operations performed by the network device in the embodiment shown in FIG10 above.

[0430] This application also provides a chip device, including a processor, for calling computer programs or computer instructions stored in the memory, so that the processor executes the method provided in the embodiment shown in FIG10 above.

[0431] In one possible implementation, the input of the chip device corresponds to the receiving operation in any of the embodiments shown in FIG10, and the output of the chip device corresponds to the sending operation in any of the embodiments shown in FIG10.

[0432] Optionally, the processor is coupled to the memory via an interface.

[0433] Optionally, the chip device may also include a memory that stores computer programs or computer instructions.

[0434] The processor mentioned above can be a general-purpose central processing unit, a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits used to control the execution of a program for controlling the method provided in any of the embodiments shown in Figure 10. The memory mentioned above can be read-only memory (ROM) or other types of static storage devices capable of storing static information and instructions, such as random access memory (RAM).

[0435] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the explanations and beneficial effects of the relevant contents in any of the above-mentioned devices can be referred to the corresponding method embodiments provided above, and will not be repeated here.

[0436] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.

[0437] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0438] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0439] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the essential contribution of the technical solution of this application, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0440] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A reference signal transmission method, characterized by, The method includes: determining Q first time domain unit groups, the Q first time domain unit groups corresponding to Q first subbands, wherein the Q is an expansion factor, a starting frequency domain position corresponding to each first subband and a frequency domain scaling coefficient P F are related to a repetition factor R and the expansion factor Q. Reference signals are transmitted in the Q first sub-bands corresponding to the Q first time domain unit groups.

2. The method of claim 1, wherein, The Q is indicated by configuration information.

3. The method according to claim 1 or 2, characterized in that, The Q first sub-bands correspond to one frequency hopping sub-band, wherein the frequency domain positions of the Q first sub-bands are either consecutive or discontinuous.

4. The method according to any one of claims 1 to 3, characterized in that, Each first time-domain unit group includes R time-domain symbols, where R is an integer greater than or equal to 2, and the R time-domain symbols are either consecutive or non-consecutive.

5. The method according to any one of claims 1 to 4, characterized in that, a starting frequency domain position of a first sub-band corresponding to one of the Q first time domain unit groups satisfies: wherein, is according to a transmit comb hopping parameter and the number of combs K TC determined, m SRS,b for a reference signal bandwidth under the bandwidth tree level b, n represents the number of subcarriers corresponding to each frequency-domain resource block b an index of a frequency-domain location of a reference signal transmitted on the first sub-band; is an initial frequency hopping index, N hop is a first frequency hopping number, Counting for frequency hopping transmission in time domain, m SRS,0 Taking a value of a reference signal bandwidth under a bandwidth tree level 0, N b is the second frequency hopping number, n SRS is the transmission number or sending count corresponding to the reference signal, m SRS,b is the reference signal bandwidth value under the bandwidth tree level b, n RRC is the frequency domain position of the starting frequency hopping sub-band, b hop is used to indicate whether reference signal frequency hopping is performed, or to indicate the range of reference signal frequency hopping; or k q (l″′) is a sub-band cyclic frequency hopping parameter, the first group of time domain units comprises a first time domain symbol, denotes a number of frequency domain resource blocks occupied by the transmission of the reference signal on the first time domain symbol, k hop is determined according to at least one of n SRS , B SRS , P F , N b , B SRS is a bandwidth tree level B SRS , and l'" is determined according to at least one of R, Q, and P F .

6. The method of claim 5, wherein, The n SRS may be determined in dependence on at least one of s, R, Q and l', wherein s = 1 or s = 2, and l' is a time domain symbol index carrying the reference signal.

7. The method according to claim 6, characterized in that, if the reference signal occupies aperiodic resources, n SRS satisfies: or 8. The method according to claim 6, characterized in that, if the reference signal occupies periodic or semi-persistent resources, n SRS satisfies: wherein, denotes the number of slots within a system frame, n f denotes the system frame number, denotes a slot number within a system frame, T offset denotes a slot offset value, T SRS denotes a slot period, the first time domain unit group comprises a first time domain symbol, l' denotes a number of the first time domain symbol, The number of time-domain symbols within the resources occupied by the reference signal is s = 1 or s = 2.

9. The method according to any one of claims 5 to 8, characterized in that, k q (l″′) satisfies: k q (l"') = l"; or, k q (l"") = l" P F ; or, k q (l"') = l"' x a + b; or, k q (l"') = (l"' x a + b) mod Q; Where a and b are constants or configurations, respectively.

10. The method according to any one of claims 5 to 9, characterized in that, l″′ satisfies: or, or 11. The method according to any one of claims 1 to 10, characterized in that, The Q first subbands correspond one-to-one with the Q second subbands, and each second subband contains the corresponding first subband.

12. The method of claim 11, wherein, The Q second subbands satisfy at least one of the following: The bandwidth of each of the Q second sub-bands is equal; The frequency domain positions occupied by the Q second sub-bands are not the same; The frequency domain positions occupied by the Q second sub-bands are consecutive; The frequency domain spacing between any two second sub-bands in the Q second sub-bands is equal; or... The bandwidth of each second subband is less than or equal to the total bandwidth of the Q first subbands.

13. The method according to claim 11 or 12, characterized in that, Each second sub-band includes P F first sub-bands.

14. The method according to any one of claims 11 to 13, characterized in that, Each first sub-band is one of the P F first sub-bands included in the corresponding second sub-band.

15. The method according to claim 13 or 14, characterized in that, The P F The bandwidths of the first subbands are the same.

16. The method according to any one of claims 1 to 15, characterized in that, The length of the transmission sequence corresponding to the reference signal is determined according to m SRS,b 、 K TC and P F ; wherein one of the Q first time domain unit groups comprises a first time domain symbol, m SRS,b represents the number of frequency domain resource blocks occupied by the transmission of the reference signal on the first time domain symbol, represents the number of subcarriers corresponding to each frequency domain resource block, K TC represents the number of combs; or, The length of the transmission sequence to which the reference signal corresponds is determined according to m SRS,b , K TC , P F and Q are determined; wherein one of the Q first time domain unit groups comprises a first time domain symbol, m SRS,b denotes a number of frequency domain resource blocks occupied by the transmission of the reference signal on the first time domain symbol, denotes the number of subcarriers corresponding to each frequency domain resource block, K TC denotes the number of combs.

17. The method according to claim 16, characterized in that, a length of a transmission sequence corresponding to the reference signal satisfies: or 18. A reference signal transmitting method, comprising: The method includes: Determine the first sub-band corresponding to the first time domain unit group, wherein the first sub-band corresponding to the first time domain unit group is a portion of the bandwidth in the second sub-band, and the second sub-band is a portion of the bandwidth of the first frequency hopping sub-band; A reference signal is transmitted through a first sub-band corresponding to the first time domain unit in at least one first time domain unit in the first time domain unit group.

19. The method of claim 18, wherein, The first time-domain unit group includes R time-domain symbols, where R is a repetition factor, which is an integer greater than or equal to 1. The repetition factor is used to indicate the number of times the reference signal is repeatedly transmitted on the first sub-band corresponding to the first time-domain unit group.

20. The method of claim 19, wherein, The R time-domain symbols are consecutive, where R is an integer greater than or equal to 2; or, The time-domain interval between any two time-domain symbols in the R time-domain symbols is equal, and R is an integer greater than or equal to 3.

21. The method of any one of claims 18-20, wherein, The first sub-band corresponding to the first time-domain unit group is one of the Q sub-bands included in the second sub-band, where Q is a cyclic frequency hopping factor, which is used for frequency hopping transmission of the Q sub-bands in the second sub-band.

22. The method of any one of claims 18-20, wherein, The first frequency hopping subband includes Q subbands, and the second subband is one of the Q subbands. Q is a cyclic frequency hopping factor, which is used for frequency hopping transmission of the subbands on the Q subbands used for transmitting reference signals.

23. The method of claim 21 or 22, wherein, The Q subbands satisfy at least one of the following: The bandwidth of each of the Q subbands is equal; The frequency domain positions occupied by the Q sub-bands are not the same; The frequency domain positions occupied by the Q sub-bands are continuous; The frequency domain spacing between any two sub-bands in the Q sub-bands is equal; or... The bandwidth of the second subband is greater than or equal to the total bandwidth of the Q subbands.

24. The method of any one of claims 21-23, wherein, The Q sub-bands correspond to Q time-domain unit groups, and the first time-domain unit group is one of the Q time-domain unit groups; the method further includes: Reference signals are transmitted through the subbands corresponding to the Q-1 time-domain unit groups, wherein the Q-1 time-domain unit groups are the time-domain unit groups other than the first time-domain unit group among the Q time-domain unit groups.

25. The method of any one of claims 21-24, wherein, The second sub-band is one of P F sub-bands included in the first frequency hopping sub-band, P F is a frequency domain scaling coefficient.

26. The method of any one of claims 21-25, wherein, The first sub-band corresponding to the first time domain unit is one of P F sub-bands included in the second sub-band, and the P F is a frequency domain scaling coefficient.

27. The method of claim 25 or 26, wherein, The P F The bandwidths of the subbands are the same in each subband.

28. The method according to any one of claims 21 to 27, characterized in that, The starting frequency domain position of the reference signal is determined according to at least one of Q, and wherein, is a first frequency hopping parameter, is a second frequency hopping parameter, is a third frequency hopping parameter, is a fourth frequency hopping parameter.

29. The method according to claim 28, characterized in that, a starting frequency domain position of the reference signal satisfies: or, or, or wherein is according to a transmit comb hopping parameter and the number of combs K TC determined, P F are frequency domain scaling coefficients.

30. The method according to claim 29, characterized in that, The is determined in accordance with Q.

31. The method according to claim 30, characterized in that, The satisfies: or, or, or, or, or, or The first time domain unit group includes a first time domain symbol, indicates a number of frequency domain resource blocks occupied by the first time domain symbol for transmitting the reference signal; denotes the number of subcarriers corresponding to each frequency domain resource block, k q (l'") is a sub-band cyclic frequency hopping parameter, k hop is a high-layer frequency hopping parameter configured by the network device for the terminal device, k F ∈{0, 1, …, P F -1}, or, k F = 0.

32. The method according to any one of claims 28 to 31, characterized in that, The According to Q determination.

33. The method according to claim 32, characterized in that, The satisfies: or, or, or The first time domain unit group includes a first time domain symbol, indicates a number of frequency domain resource blocks occupied by the first time domain symbol for transmitting the reference signal; denotes the number of subcarriers corresponding to each frequency domain resource block, k q (l'") is a subband cyclic frequency hopping parameter.

34. The method of claim 33, wherein, k q (l'") is determined according to at least one of R, Q and P F , R being a repetition factor, P F being a frequency domain scaling coefficient.

35. The method of claim 34, wherein, k q (l"') satisfies: k q (l"') = l"; or, k q (l"') = l"' x a + b; or, k q (l"') = (l"' * a + b) mod Q; or, k q (l″′) = l" P F ; where a and b are constants, l'" is determined according to at least one of R, Q, and P F where R is a repetition factor.

36. The method of claim 35, wherein, l" is determined according to at least one of R, Q and P F l" is determined according to at least one of R, Q and P 37. The method of claim 36, wherein, l″′ satisfies: or, or 38. The method of any one of claims 18-37, wherein, a number of transmissions or a transmission count n corresponding to the reference signal SRS is determined according to at least one of l', s, R and Q; wherein the first group of time domain units comprises a first time domain symbol, l' is a number of the first time domain symbol, R is a repetition factor, Q is a cyclic frequency hopping factor, and s = 1 or s = 2.

39. The method according to claim 38, characterized in that, if the reference signal occupies aperiodic resources, n SRS satisfies: or 40. The method according to claim 38, characterized in that, if the reference signal occupies periodic or semi-persistent resources, n SRS satisfies: wherein denotes the number of slots within a system frame, n f denotes the system frame number, denotes a slot number within a system frame, T offset denotes a slot offset value, T SRS denotes a slot period, the first time domain unit group comprises a first time domain symbol, l' denotes a number of the first time domain symbol, The number of time-domain symbols within the resources occupied by the reference signal is represented by R, which is the repetition factor, Q is the cyclic frequency hopping factor, and s = 1 or s = 2.

41. The method according to any one of claims 18 to 40, characterized in that, The length of the transmission sequence corresponding to the reference signal is based on m. SRS,b , K TC and P F Determined; wherein, the first time-domain unit group includes the first time-domain symbol, m SRS,b This indicates the number of frequency domain resource blocks occupied by the reference signal transmitted on the first time domain symbol. K represents the number of subcarriers corresponding to each frequency domain resource block. TC P represents the number of combs. F Represents the frequency domain scaling factor; or, The length of the transmission sequence corresponding to the reference signal is based on m. SRS,b , K TC P F And Q is determined; wherein, the first time-domain unit group includes the first time-domain symbol, m SRS,b This indicates the number of frequency domain resource blocks occupied by the reference signal transmitted on the first time domain symbol. denotes the number of subcarriers corresponding to each frequency domain resource block, K TC denotes the number of combs, P F denotes the frequency domain scaling factor, Q is the cyclic frequency hopping factor.

42. The method according to claim 41, characterized in that, The length of the transmission sequence corresponding to the reference signal satisfy: or, 43. A communication device, characterized in that, The communication device includes a transceiver module and a processing module; The transceiver module is configured to perform the transceiver operation of the method as described in any one of claims 1 to 17, and the processing module is configured to perform the processing operation of the method as described in any one of claims 1 to 17; or, The transceiver module is used to perform the transceiver operation of the method as described in any one of claims 18 to 42, and the processing module is used to perform the processing operation of the method as described in any one of claims 18 to 42.

44. A communication device, characterized in that, The communication device includes a processor configured to execute a computer program or computer instructions in a memory to perform the method as described in any one of claims 1 to 17, or to perform the method as described in any one of claims 18 to 42.

45. A computer-readable storage medium, characterized in that, It stores a computer program or instructions thereon, which, when executed by a communication device, cause the communication device to perform the method as described in any one of claims 1 to 17, or cause the communication device to perform the method as described in any one of claims 18 to 42.

Images