Communication method and apparatus, and computer-readable storage medium

Abstract

Provided in the present application are a communication method and apparatus, and a computer-readable storage medium. The method comprises: on the basis of a reference signal pattern, performing first processing on a first sequence, so as to determine a target sequence; and according to a first rule, performing second processing on the target sequence in the time domain, so as to determine a reference signal, wherein the reference signal is a signal that has been subjected to time-domain mapping, the first rule is related to an orthogonal code corresponding to an antenna port number and / or the reference signal pattern, and the antenna port number is an even number. By means of the present application, multi-port transmission can be realized in a scenario where high coverage requirements are imposed and a single-carrier type is SC-QAM, thereby increasing the utilization rate of time-frequency resources.

Description

Communication method, apparatus and computer readable storage medium

[0001] The present application claims priority to the Chinese patent application No. 202411176285.4, filed on August 23, 2024, entitled "Communication method, apparatus and computer readable storage medium", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the field of communication technology, in particular to a communication method, apparatus and computer readable storage medium. BACKGROUND

[0003] Currently, several waveforms commonly used in communication systems include orthogonal frequency division multiplexing (OFDM) and discrete Fourier transform-spreading-orthogonal frequency division multiplexing (DFT-s-OFDM). The DFT-s-OFDM is a single-carrier waveform, and the OFDM is a multi-carrier waveform. The peak to average power ratio (PAPR) of the single-carrier waveform is lower than that of the multi-carrier waveform, and the complexity is low. Under the same power amplifier, the single-carrier waveform can provide greater output power and higher power amplifier efficiency, thereby achieving the purpose of improving coverage and reducing energy consumption. The single-carrier waveform can also be a single carrier-quadrature amplitude modulation (SC-QAM) waveform or a single carrier-frequency domain equalization (SC-FDE) and the like.

[0004] When the single-carrier type is SC-QAM, the single-carrier waveform is generated in the time domain without a frequency domain resource mapping process, and a single antenna port is configured. When there are multiple user transmissions, time division transmission can only be performed between different users. Therefore, in a scenario with a relatively high coverage requirement and a single-carrier type of SC-QAM, how to implement multi-port transmission and improve the time-frequency resource utilization is a technical problem faced by those skilled in the art. SUMMARY

[0005] The application provides a communication method, device and computer readable storage medium, which realizes multi-port transmission and improves time-frequency resource utilization in a single-carrier type SC-QAM scenario with high coverage scene requirements.

[0006] In a first aspect, an embodiment of the application provides a communication method, which can be applied to a terminal-side device, which can be a terminal device, a component (for example, a processor, a chip, a circuit, or a chip system) in the terminal device, or a logic module or software capable of realizing all or part of the terminal device functions, and the method comprises: determining a target sequence by performing first processing on a first sequence based on a reference signal pattern; and determining a reference signal by performing second processing on the target sequence in the time domain according to a first rule, wherein the reference signal is a signal after time domain mapping, the first rule is related to an orthogonal code corresponding to an antenna port number and / or the reference signal pattern, and the antenna port number is even.

[0007] In the above method, when the antenna port number is even, the process of determining the target sequence by performing first processing on the first sequence based on the reference signal pattern, that is, the process of repeatedly expanding the first sequence to determine the target sequence, is equivalent to comb-shaped mapping of a frequency domain reference signal symbol, and the process of determining the reference signal by performing second processing on the target sequence in the time domain according to the first rule is equivalent to determining the starting position of the frequency domain reference signal symbol. Therefore, the process of performing processing on the first sequence corresponding to a single-carrier waveform in the time domain is equivalent to the process of resource mapping of the frequency domain reference signal symbol, thereby realizing multi-port transmission and improving time-frequency resource utilization.

[0008] In a possible implementation, the method further comprises: receiving first indication information, the first indication information comprising one or more of the following: a sequence type, the antenna port number, or the length of the first sequence; and determining the first sequence based on the first indication information.

[0009] In another possible implementation, the method further comprises: determining the reference signal pattern based on the antenna port number, the reference signal pattern comprising reference signal frequency domain density information.

[0010] In another possible implementation, when the reference signal frequency domain density information is 1 / 2 and the length of the first sequence is N, the length of the target sequence is 2N, wherein N is a positive integer greater than 1.

[0011] In another possible implementation, the process of determining the target sequence by performing first processing on the first sequence based on the reference signal pattern comprises: determining the target sequence, the target sequence comprising two first sequences.

[0012] In the method, the process can be understood as a process of repeatedly extending the first sequence to determine the target sequence, equivalent to comb mapping of the frequency domain reference signal symbol, further realizing multi-port transmission, and improving time-frequency resource utilization.

[0013] In a further possible implementation, the second processing of the target sequence in the time domain according to the first rule to determine the reference signal comprises: multiplying the target sequence by a mapping parameter in the time domain to determine the reference signal, the mapping parameter being determined based on the first rule.

[0014] In the method, the processing process is equivalent to determining the starting position of the frequency domain reference signal symbol on the first subcarrier in the starting resource block from the partial bandwidth, thereby realizing multi-port transmission and improving time-frequency resource utilization.

[0015] In a further possible implementation, the first rule comprises a relationship satisfied between a symbol index of the reference signal, a first parameter, and a second parameter, the first parameter and the second parameter being related to the antenna port number.

[0016] In a further possible implementation, wherein l=0,1 represents a time domain orthogonal frequency division multiplexing (OFDM) symbol index of the reference signal; k is 0-2N-1; N represents the length of the first sequence, Δ represents the first parameter, t represents the second parameter, and s l (k) represents the time domain sequence index corresponding to the lth OFDM symbol; y l (k) represents the kth reference symbol after time domain mapping.

[0017] In a further possible implementation, the first parameter and the second parameter are related to the antenna port number, comprising one or more of the following: when the antenna port number is port 0, the first parameter is 0 and the second parameter is 0; when the antenna port number is port 2, the first parameter is 1 and the second parameter is 0; when the antenna port number is port 4, the first parameter is 0 and the second parameter is 1; or when the antenna port number is port 6, the first parameter is 1 and the second parameter is 1.

[0018] In a further possible implementation, when the sequence type comprises a Golay sequence, the antenna port number is port 0 or port 2.

[0019] Optionally, when the sequence type comprises a double-symbol Golay sequence, the antenna port number is double-symbol port 0 or double-symbol port 2.

[0020] In the method, since the orthogonal codes corresponding to the double-symbol port 0 and the double-symbol port 2 are the same, by such a manner, the complementarity of the Golay sequence can be ensured, thereby ensuring the orthogonality.

[0021] In a second aspect, an embodiment of the present application provides a communication method, which can be applied to a network side device. The network side device can be a network equipment, a component (for example, a processor, a chip, a circuit, or a chip system) in the network equipment, or a logic module or software capable of realizing all or part of the functions of the network equipment. The method comprises the following steps: sending first indication information, wherein the first indication information comprises one or more of the following: a sequence type, an antenna port number, or a length of a first sequence; receiving a first signal based on the first indication information, wherein the first signal comprises a reference signal, the reference signal is determined by performing a second processing on a target sequence in a time domain according to a first rule, the target sequence is determined by performing a first processing on the first sequence based on a reference signal pattern, the reference signal is a signal after time domain mapping, the first rule is related to an orthogonal code corresponding to the antenna port number and / or the reference signal pattern, and the antenna port number is an even number.

[0022] In a possible implementation, the reference signal pattern comprises reference signal frequency domain density information.

[0023] In another possible implementation, when the reference signal frequency domain density information is 1 / 2 and the length of the first sequence is N, the length of the target sequence is 2N, wherein N is a positive integer greater than 1.

[0024] In another possible implementation, the target sequence comprises two first sequences.

[0025] In another possible implementation, the reference signal is determined by multiplying the target sequence by a mapping parameter in the time domain, and the mapping parameter is determined based on the first rule.

[0026] In another possible implementation, the first rule comprises a relationship between a symbol index of the reference signal, a first parameter, and a second parameter, and the first parameter and the second parameter are related to the antenna port number.

[0027] In another possible implementation, wherein l=0, 1 represents a time domain orthogonal frequency division multiplexing (OFDM) symbol index of the reference signal, k is 0-2N-1, N represents the length of the first sequence, Δ represents the first parameter, t represents the second parameter, and s l () represents a time domain sequence index corresponding to the lth OFDM symbol; y l (k) represents the kth reference symbol after time domain mapping.

[0028] In yet another possible implementation, the first parameter and the second parameter are related to the antenna port number, including one or more of the following: when the antenna port number is port 0, the first parameter is 0 and the second parameter is 0; when the antenna port number is port 2, the first parameter is 1 and the second parameter is 0; when the antenna port number is port 4, the first parameter is 0 and the second parameter is 1; or when the antenna port number is port 6, the first parameter is 1 and the second parameter is 1.

[0029] In yet another possible implementation, when the sequence type includes a Golay sequence, the antenna port number is port 0 or port 2.

[0030] As to the technical effects brought by the second aspect or possible implementation, reference can be made to the introduction of the technical effects of the first aspect or corresponding implementation.

[0031] In a third aspect, an embodiment of the present application provides a communication method, which can be applied to a terminal side device. The terminal side device can be a terminal device, a component (for example, a processor, a chip, a circuit, or a chip system) in the terminal device, or a logic module or software capable of realizing all or part of the terminal device functions. The method includes: grouping a first sequence based on a reference signal pattern to determine a first sub-sequence and a second sub-sequence, the first sub-sequence being a first group of sequences, and the second sub-sequence being a second group of sequences; performing first processing on the first sub-sequence and the second sub-sequence based on the reference signal pattern to determine a second sequence and a third sequence; and performing second processing on the second sequence and the third sequence in a time domain according to a first rule to determine a reference signal, wherein the reference signal is a signal after time domain mapping, and the first rule is related to one or more of the following, including: an orthogonal code corresponding to an antenna port number, the reference signal pattern, or grouping information; the antenna port number is odd, and the grouping information is a group in which the first sub-sequence and / or the second sub-sequence is located.

[0032] In the method, when the antenna port number is odd, grouping the first sequence based on the reference signal pattern to determine the first sub-sequence and the second sub-sequence can be understood as that the reference signal pattern includes reference signal frequency domain density information, the reference signal frequency domain density information is 1 / 2, the first sequence is divided into two groups based on the reference signal frequency domain density information, and the two groups are the first sub-sequence and the second sub-sequence. The first processing is respectively performed on the first sub-sequence and the second sub-sequence based on the reference signal pattern to determine the second sequence and the third sequence, that is, the process of repeatedly expanding the first sub-sequence to determine the second sequence and repeatedly expanding the second sub-sequence to determine the third sequence is equivalent to comb mapping of the frequency domain reference signal symbol, and the second processing is performed on the second sequence and the third sequence in the time domain according to the first rule to determine the reference signal, which is equivalent to determining the starting position of the frequency domain reference signal symbol. Therefore, through the above method, that is, the processing of the first sequence corresponding to the single carrier waveform in the time domain, the process of resource mapping of the frequency domain reference signal symbol is equivalent, so as to realize multi-port transmission and improve the time-frequency resource utilization rate.

[0033] In a possible implementation, the method further includes: receiving first indication information, the first indication information including one or more of the following: sequence type, the antenna port number, or the length of the first sequence; and determining the first sequence based on the first indication information.

[0034] In another possible implementation, the method further includes: determining the reference signal pattern based on the antenna port number, the reference signal pattern including reference signal frequency domain density information.

[0035] In another possible implementation, when the reference signal frequency domain density information is 1 / 2 and the length of the first sequence is N, the lengths of the first sub-sequence and the second sub-sequence are N / 2, and the lengths of the second sequence and the third sequence are 2N, where N is a positive integer greater than 1.

[0036] In another possible implementation, the first processing is respectively performed on the first sub-sequence and the second sub-sequence based on the reference signal pattern to determine the second sequence and the third sequence, including: determining the second sequence, the second sequence including four first sub-sequences; and determining the third sequence, the third sequence including four second sub-sequences.

[0037] In the method, the above process can be understood as: the process of repeatedly expanding the first sub-sequence to determine the second sequence and repeatedly expanding the second sub-sequence to determine the third sequence is equivalent to comb mapping of the frequency domain reference signal symbol, further realizing multi-port transmission and improving the time-frequency resource utilization rate.

[0038] In a further possible implementation form of the method, the second processing of the second sequence and the third sequence in the time domain according to the first rule to determine the reference signal comprises multiplying the second sequence by a first mapping parameter and adding the third sequence multiplied by a second mapping parameter to determine the reference signal, the first mapping parameter and the second mapping parameter being determined based on the first rule.

[0039] In the above method, the processing process is equivalent to determining that the starting position of the frequency domain reference signal symbol is on the first subcarrier in the partial bandwidth starting resource block, thereby realizing multi-port transmission and improving the time-frequency resource utilization.

[0040] In a further possible implementation form of the method, the first rule comprises a relationship satisfied between a symbol index of the reference signal, grouping information, a first parameter and a second parameter, the first parameter and the second parameter being related to the antenna port number.

[0041] In a further possible implementation form of the method,

[0042] wherein l=0,1 represents a time domain orthogonal frequency division multiplexing, OFDM, symbol index of the reference signal; u=1,2 represents grouping information, k takes a value of 0-2N-1; N represents a length of the first sequence, Δ represents the first parameter, t represents the second parameter, and s l,u y (l,u) represents a time domain sequence index corresponding to the lth OFDM symbol in the uth group; y l,u (k) represents the kth reference symbol in the uth group after time domain mapping, y l (k) represents the kth reference symbol after time domain mapping.

[0043] In a further possible implementation form of the method, the first parameter and the second parameter are related to the antenna port number, comprising one or more of the following: when the antenna port number is port 1, the first parameter is 0 or (2 / 3), and the second parameter is 0; when the antenna port number is port 3, the first parameter is 1, and the second parameter is 0; when the antenna port number is port 5, the first parameter is 0, and the second parameter is 1; or when the antenna port number is port 7, the first parameter is 1, and the second parameter is 1.

[0044] In a fourth aspect, an embodiment of the present application provides a communication method, which can be applied to a network side device. The network side device can be a network equipment, a component (for example, a processor, a chip, a circuit, or a chip system) in the network equipment, or a logic module or software capable of realizing all or part of the functions of the network equipment. The method comprises the following steps: sending first indication information, the first indication information comprising one or more of the following: a sequence type, an antenna port number, or a length of a first sequence; receiving a first signal based on the first indication information, the first signal comprising a reference signal, the reference signal being determined by performing second processing on a second sequence and a third sequence in a time domain according to a first rule, the second sequence and the third sequence being determined by performing first processing on a first sub-sequence and a second sub-sequence based on a reference signal pattern, the first sub-sequence and the second sub-sequence being determined by grouping the first sequence based on the reference signal pattern, wherein the first sub-sequence is a first group sequence, and the second sub-sequence is a second group sequence; the first rule being related to one or more of the following: an orthogonal code corresponding to the antenna port number, the reference signal pattern, or grouping information; the antenna port number being an odd number, the grouping information being a group in which the first sub-sequence and / or the second sub-sequence is located, and the reference signal being a signal after time domain mapping.

[0045] In a possible implementation, the reference signal pattern comprises reference signal frequency domain density information.

[0046] In another possible implementation, when the reference signal frequency domain density information is 1 / 2, the length of the first sequence is N, the length of the first sub-sequence and the second sub-sequence is N / 2, and the length of the second sequence and the third sequence is 2N, where N is a positive integer greater than 1.

[0047] In another possible implementation, the second sequence comprises four first sub-sequences, and the third sequence comprises four second sub-sequences.

[0048] In another possible implementation, the reference signal is determined by multiplying the second sequence by a first mapping parameter and adding the third sequence multiplied by a second mapping parameter in the time domain, the first mapping parameter and the second mapping parameter being determined based on the first rule.

[0049] In another possible implementation, the first rule comprises a relationship between a symbol index of the reference signal, the grouping information, a first parameter, and a second parameter, the first parameter and the second parameter being related to the antenna port number.

[0050] In another possible implementation,

[0051] wherein, l=0,1 represents a time domain orthogonal frequency division multiplexing, OFDM, symbol index of the reference signal; u=1,2 represents grouping information, k is valued from 0 to 2N-1; N represents a length of the first sequence, Δ represents the first parameter, t represents the second parameter, s l,u () represents a time domain sequence index corresponding to the lth OFDM symbol in the u-th group; y l,u (k) represents the kth reference symbol in the u-th group after time domain mapping, y l (k) represents the kth reference symbol after time domain mapping.

[0052] In yet another possible implementation, the first parameter and the second parameter are related to the antenna port number, including one or more of the following: when the antenna port number is port 1, the first parameter is 0 or (2 / 3), and the second parameter is 0; when the antenna port number is port 3, the first parameter is 1, and the second parameter is 0; when the antenna port number is port 5, the first parameter is 0, and the second parameter is 1; or when the antenna port number is port 7, the first parameter is 1, and the second parameter is 1.

[0053] As to the technical effects brought by the fourth aspect or possible implementation, reference can be made to the introduction of the technical effects of the third aspect or corresponding implementation.

[0054] In a fifth aspect, an embodiment of the present application provides a communication apparatus, which can be a terminal device, a component (for example, a processor, a chip, a circuit, or a chip system, etc.) in the terminal device, or a logic module or software capable of realizing all or part of the terminal device functions.

[0055] In a possible implementation, the communication apparatus can include a module or unit or means corresponding to each of the methods / operations / steps / actions described in the first aspect, which can be a hardware circuit, software, or a combination of hardware circuit and software.

[0056] In a possible implementation, the communication apparatus includes a processing unit and a transceiver unit, the processing unit is configured to perform first processing on a first sequence based on a reference signal pattern to determine a target sequence; and the processing unit is further configured to perform second processing on the target sequence in a time domain according to a first rule to determine a reference signal, wherein the reference signal is a signal after time domain mapping, the first rule is related to an orthogonal code corresponding to an antenna port number and / or the reference signal pattern, and the antenna port number is an even number.

[0057] In a possible implementation, the transceiver is configured to receive first indication information, the first indication information including one or more of the following: a sequence type, the antenna port number, or a length of the first sequence; and the processing unit is further configured to determine the first sequence based on the first indication information.

[0058] In another possible implementation, the processing unit is further configured to determine the reference signal pattern based on the antenna port number, the reference signal pattern including reference signal frequency domain density information.

[0059] In another possible implementation, when the reference signal frequency domain density information is 1 / 2 and the length of the first sequence is N, the length of the target sequence is 2N, where N is a positive integer greater than 1.

[0060] In another possible implementation, the processing unit is configured to determine the target sequence, the target sequence including two first sequences.

[0061] In another possible implementation, the processing unit is configured to multiply the target sequence by a mapping parameter in the time domain to determine the reference signal, the mapping parameter being determined based on the first rule.

[0062] In another possible implementation, the first rule includes a relationship between a symbol index of the reference signal, a first parameter, and a second parameter, the first parameter and the second parameter being related to the antenna port number.

[0063] In another possible implementation, wherein l = 0, 1 represents a time domain orthogonal frequency division multiplexing (OFDM) symbol index of the reference signal; k is 0-2N-1; N represents the length of the first sequence, Δ represents the first parameter, t represents the second parameter, and s l represents a time domain sequence index corresponding to the lth OFDM symbol; y l (k) represents the kth reference symbol after time domain mapping.

[0064] In another possible implementation, the first parameter and the second parameter are related to the antenna port number, including one or more of the following: when the antenna port number is port 0, the first parameter is 0 and the second parameter is 0; when the antenna port number is port 2, the first parameter is 1 and the second parameter is 0; when the antenna port number is port 4, the first parameter is 0 and the second parameter is 1; or when the antenna port number is port 6, the first parameter is 1 and the second parameter is 1.

[0065] In another possible implementation, when the sequence type includes a Golay sequence, the antenna port number is port 0 or port 2.

[0066] As to the technical effects brought by the fifth aspect or possible implementation manners, refer to the introduction of the technical effects of the first aspect or corresponding implementation manners.

[0067] In a sixth aspect, an embodiment of the present application provides a communication apparatus, which can be a network device, a component (for example, a processor, a chip, a circuit, or a chip system, etc.) in the network device, or a logic module or software capable of realizing all or part of the network device functions.

[0068] In a possible implementation, the communication apparatus can include a module or unit or means corresponding to each of the methods / operations / steps / actions described in the second aspect, which can be a hardware circuit, software, or a combination of hardware circuit and software.

[0069] In a possible implementation, the communication apparatus includes a processing unit and a transceiver unit, the transceiver unit is configured to send first indication information, the first indication information includes one or more of the following: a sequence type, an antenna port number, or a length of a first sequence; and the transceiver unit is further configured to receive a first signal based on the first indication information, the first signal includes a reference signal, the reference signal is determined by performing a second processing on a target sequence in a time domain according to a first rule, the target sequence is determined by performing a first processing on the first sequence based on a reference signal pattern, the reference signal is a signal after time domain mapping, the first rule is related to a orthogonal code corresponding to the antenna port number and / or the reference signal pattern, and the antenna port number is even.

[0070] In a possible implementation, the reference signal pattern includes reference signal frequency domain density information.

[0071] In another possible implementation, when the reference signal frequency domain density information is 1 / 2 and the length of the first sequence is N, the length of the target sequence is 2N, where N is a positive integer greater than 1.

[0072] In another possible implementation, the target sequence includes two first sequences.

[0073] In another possible implementation, the reference signal is determined by multiplying the target sequence by a mapping parameter in the time domain, and the mapping parameter is determined based on the first rule.

[0074] In another possible implementation, the first rule includes a relationship between a symbol index of the reference signal, a first parameter, and a second parameter, and the first parameter and the second parameter are related to the antenna port number.

[0075] In another possible implementation, wherein, l=0,1 represents a time domain orthogonal frequency division multiplexing, OFDM, symbol index of the reference signal; k is valued from 0 to 2N-1; N represents a length of the first sequence, Δ represents the first parameter, t represents the second parameter, s l () represents a time domain sequence index corresponding to the lth OFDM symbol; y l (k) represents the kth reference symbol after time domain mapping.

[0076] In yet another possible implementation, the first parameter and the second parameter are related to the antenna port number, including one or more of the following: when the antenna port number is port 0, the first parameter is 0 and the second parameter is 0; when the antenna port number is port 2, the first parameter is 1 and the second parameter is 0; when the antenna port number is port 4, the first parameter is 0 and the second parameter is 1; or when the antenna port number is port 6, the first parameter is 1 and the second parameter is 1.

[0077] In yet another possible implementation, when the sequence type includes a Golay sequence, the antenna port number is port 0 or port 2.

[0078] As to the technical effects brought by the sixth aspect or possible implementation, reference can be made to the introduction of the technical effects of the second aspect or corresponding implementation.

[0079] In a seventh aspect, an embodiment of the present application provides a communication apparatus, which can be a terminal device, a component (for example, a processor, a chip, a circuit, or a chip system) in the terminal device, or a logic module or software capable of realizing all or part of the terminal device functions.

[0080] In a possible implementation, the communication apparatus can include a module or unit or means corresponding to each of the methods / operations / steps / actions described in the first aspect, which can be a hardware circuit, software, or a combination of hardware circuit and software.

[0081] In a possible implementation, the communication apparatus comprises: a processing unit and a transceiver unit, the processing unit is configured to determine a first sub-sequence and a second sub-sequence based on a reference signal pattern, the first sub-sequence is a first group of sequences, and the second sub-sequence is a second group of sequences; the processing unit is further configured to determine a second sequence and a third sequence based on the first sub-sequence and the second sub-sequence respectively by performing a first processing on the first sub-sequence and the second sub-sequence based on the reference signal pattern; and the processing unit is further configured to determine a reference signal by performing a second processing on the second sequence and the third sequence in a time domain according to a first rule, wherein the reference signal is a signal after time domain mapping, the first rule is related to one or more of the following: an orthogonal code corresponding to an antenna port number, the reference signal pattern, or grouping information, the antenna port number is an odd number, and the grouping information is a group in which the first sub-sequence and / or the second sub-sequence is located.

[0082] In a possible implementation, the transceiver unit is configured to receive first indication information, the first indication information comprises one or more of the following: a sequence type, the antenna port number, or a length of the first sequence; and the processing unit is configured to determine the first sequence based on the first indication information.

[0083] In another possible implementation, the processing unit is further configured to determine the reference signal pattern based on the antenna port number, the reference signal pattern comprises reference signal frequency domain density information.

[0084] In another possible implementation, when the reference signal frequency domain density information is 1 / 2, the length of the first sequence is N, the length of the first sub-sequence and the second sub-sequence is N / 2, and the length of the second sequence and the third sequence is 2N, wherein N is a positive integer greater than 1.

[0085] In another possible implementation, the processing unit is configured to determine the second sequence, the second sequence comprises four first sub-sequences; and determine the third sequence, the third sequence comprises four second sub-sequences.

[0086] In another possible implementation, the processing unit is configured to determine the reference signal by multiplying the second sequence by a first mapping parameter and adding the third sequence multiplied by a second mapping parameter in the time domain, the first mapping parameter and the second mapping parameter are determined based on the first rule.

[0087] In another possible implementation, the first rule comprises a relationship between a symbol index of a reference signal, grouping information, a first parameter, and a second parameter, the first parameter and the second parameter are related to the antenna port number.

[0088] In another possible implementation,

[0089] wherein, l = 0, 1 represents a time domain orthogonal frequency division multiplexing, OFDM, symbol index of the reference signal; u = 1, 2 represents grouping information, k is valued from 0 to 2N-1; N represents a length of the first sequence, Δ represents the first parameter, t represents the second parameter, s l,u () represents a time domain sequence index corresponding to the lth OFDM symbol in the u-th group; y l,u (k) represents the kth reference symbol in the u-th group after time domain mapping, y l (k) represents the kth reference symbol after time domain mapping.

[0090] In yet another possible implementation, the first parameter and the second parameter are related to the antenna port number, including one or more of the following: when the antenna port number is port 1, the first parameter is 0 or (2 / 3), and the second parameter is 0; when the antenna port number is port 3, the first parameter is 1, and the second parameter is 0; when the antenna port number is port 5, the first parameter is 0, and the second parameter is 1; or when the antenna port number is port 7, the first parameter is 1, and the second parameter is 1.

[0091] As to the technical effects brought by the seventh aspect or possible implementation, reference can be made to the introduction of the technical effects of the third aspect or corresponding implementation.

[0092] In an eighth aspect, an embodiment of the present application provides a communication apparatus, which can be a network device, a component (for example, a processor, a chip, a circuit, or a chip system) in the network device, or a logic module or software capable of realizing all or part of the network device functions.

[0093] In a possible implementation, the communication apparatus can include a module or unit or means corresponding to each of the methods / operations / steps / actions described in the second aspect, which can be a hardware circuit, software, or a combination of hardware circuit and software.

[0094] In a possible implementation, the communication apparatus comprises: a processing unit and a transceiver unit, the transceiver unit is configured to send first indication information, the first indication information comprises one or more of the following: sequence type, antenna port number or length of the first sequence; the transceiver unit is further configured to receive a first signal based on the first indication information, the first signal comprises a reference signal, the reference signal is determined by performing a second processing on a second sequence and a third sequence in a time domain according to a first rule, the second sequence and the third sequence are determined by performing a first processing on a first sub-sequence and a second sub-sequence based on a reference signal pattern, respectively, the first sub-sequence and the second sub-sequence are determined by grouping the first sequence based on the reference signal pattern, wherein the first sub-sequence is a first group sequence and the second sub-sequence is a second group sequence; the first rule is related to one or more of the following: an orthogonal code corresponding to the antenna port number, the reference signal pattern or grouping information; the antenna port number is an odd number, the grouping information is a group in which the first sub-sequence and / or the second sub-sequence is located, and the reference signal is a signal after time domain mapping.

[0095] In a possible implementation, the reference signal pattern comprises reference signal frequency domain density information, when the reference signal frequency domain density information is 1 / 2, the length of the first sequence is N, the length of the first sub-sequence and the second sub-sequence is N / 2, and the length of the second sequence and the third sequence is 2N, where N is a positive integer greater than 1.

[0096] In another possible implementation, the second sequence comprises four first sub-sequences, and the third sequence comprises four second sub-sequences.

[0097] In another possible implementation, the reference signal is determined by multiplying the second sequence by a first mapping parameter and adding the third sequence multiplied by a second mapping parameter in the time domain, the first mapping parameter and the second mapping parameter are determined based on the first rule.

[0098] In another possible implementation, the first rule comprises: a relationship between a symbol index of the reference signal, grouping information, a first parameter and a second parameter, the first parameter and the second parameter are related to the antenna port number.

[0099] In another possible implementation,

[0100] wherein l=0,1 represents a time domain orthogonal frequency division multiplexing, OFDM, symbol index of the reference signal; u=1,2 represents grouping information, k takes a value from 0 to 2N-1; N represents the length of the first sequence, Δ represents the first parameter, t represents the second parameter, and s represents the reference signal. l,u() represents the time domain sequence index corresponding to the lth OFDM symbol in the u th group; y l,u (k) represents the kth reference symbol in the u th group after time domain mapping, y l (k) represents the kth reference symbol after time domain mapping.

[0101] In yet another possible implementation, the first parameter and the second parameter are related to the antenna port number, including one or more of the following: when the antenna port number is port 1, the first parameter is 0 or (2 / 3), and the second parameter is 0; when the antenna port number is port 3, the first parameter is 1, and the second parameter is 0; when the antenna port number is port 5, the first parameter is 0, and the second parameter is 1; or when the antenna port number is port 7, the first parameter is 1, and the second parameter is 1.

[0102] As to the technical effects brought by the eighth aspect or possible implementation, reference can be made to the introduction of the technical effects of the fourth aspect or corresponding implementation.

[0103] In a ninth aspect, an embodiment of the present application provides a communication device, which includes at least one processor, and the at least one processor invokes a computer program or instruction stored in a memory to execute the method of the first aspect or possible implementation of the first aspect.

[0104] In a possible implementation, the communication device further includes a memory and a communication interface. Optionally, the memory and the processor are integrated together.

[0105] In a possible implementation, the memory is located outside the communication device.

[0106] In a tenth aspect, an embodiment of the present application provides a communication device, which includes at least one processor, and the at least one processor invokes a computer program or instruction stored in a memory to execute the method of the second aspect or possible implementation of the second aspect.

[0107] In a possible implementation, the communication device further includes a memory and a communication interface. Optionally, the memory and the processor are integrated together.

[0108] In a possible implementation, the memory is located outside the communication device.

[0109] In an eleventh aspect, an embodiment of the present application provides a communication device, which includes at least one processor, and the at least one processor invokes a computer program or instruction stored in a memory to execute the method of the first aspect or possible implementation of the first aspect.

[0110] In a possible implementation, the communication apparatus further includes a memory and a communication interface. Optionally, the memory and the processor are integrated together.

[0111] In a possible implementation, the memory is located outside the communication apparatus.

[0112] In a twelfth aspect, an embodiment of the present application provides a communication apparatus, including at least one processor, which invokes a computer program or instructions stored in a memory to execute the method in the second aspect or possible implementation manners of the second aspect.

[0113] In a possible implementation, the communication apparatus further includes a memory and a communication interface. Optionally, the memory and the processor are integrated together.

[0114] In a possible implementation, the memory is located outside the communication apparatus.

[0115] In a thirteenth aspect, an embodiment of the present application provides a chip apparatus, including at least one processor, which is configured to execute a computer program or instructions to implement the method in any of the aspects or possible implementation manners of the aspects.

[0116] In a possible implementation, an input of the chip apparatus corresponds to the receiving operation in any of the aspects or possible implementation manners of the aspects, and an output of the chip apparatus corresponds to the sending operation in any of the aspects or possible implementation manners of the aspects.

[0117] Optionally, the processor is coupled with the memory through an interface.

[0118] Optionally, the chip apparatus further includes a memory, and the memory stores computer program instructions.

[0119] In a fourteenth aspect, an embodiment of the present application provides a computer readable storage medium, which stores computer programs or instructions, and when the computer programs or instructions are run on a processor, the method in any of the aspects is implemented.

[0120] In a fifteenth aspect, an embodiment of the present application provides a computer program product, which includes computer programs or instructions, and when the computer programs or instructions are run on a processor, the method in any of the aspects is implemented.

[0121] In a sixteenth aspect, an embodiment of the present application provides a communication system, including the apparatus in the ninth aspect and the apparatus in the tenth aspect, or the apparatus in the eleventh aspect and the apparatus in the twelfth aspect. BRIEF DESCRIPTION OF DRAWINGS

[0122] FIG. 1 is a schematic diagram of an architecture of a communication system according to an embodiment of the present application;

[0123] FIG. 2 is a schematic diagram of a generation process of a DFT-s-OFDM transmitter;

[0124] FIG. 3 is a schematic diagram of PAPR of single carrier and multi-carrier signals;

[0125] FIG. 4 is a schematic diagram of coverage range of single carrier waveforms under different modulations;

[0126] FIG. 5 is a schematic diagram of a generation process of a filter SC-QAM transmitter;

[0127] FIG. 6 is a schematic diagram of a shaping filter;

[0128] FIG. 7 is a schematic diagram of a DMRS Type 1 format;

[0129] FIG. 8 is a schematic diagram of a DMRS Type 2 format;

[0130] FIG. 9 is a schematic diagram of a communication method according to an embodiment of the present application;

[0131] FIG. 10 is a schematic diagram of a time domain resource according to an embodiment of the present application;

[0132] FIG. 11 is a schematic diagram of determining a target sequence according to an embodiment of the present application;

[0133] FIG. 12 is a schematic diagram of determining a target sequence according to another embodiment of the present application;

[0134] FIGS. 13-16 are schematic diagrams of determining a reference signal according to an embodiment of the present application;

[0135] FIG. 17 is a schematic diagram of another communication method according to an embodiment of the present application;

[0136] FIG. 18 is a schematic diagram of determining a first sub-sequence and a second sub-sequence according to an embodiment of the present application;

[0137] FIG. 19 is a schematic diagram of determining a second sequence and a third sequence according to an embodiment of the present application;

[0138] FIG. 20 is a schematic diagram of grouping sequence pairs according to an embodiment of the present application;

[0139] FIG. 21 is a schematic diagram of determining a second sequence, a third sequence, a fourth sequence and a fifth sequence according to an embodiment of the present application;

[0140] FIGS. 22-25 are schematic diagrams of determining a reference signal according to an embodiment of the present application;

[0141] FIG. 26 is a schematic diagram of another communication method according to an embodiment of the present application;

[0142] FIG. 27 is a schematic diagram of determining a second sequence and a third sequence according to an embodiment of the present application;

[0143] FIG. 28 is a schematic diagram of determining a second sequence, a third sequence, a fourth sequence and a fifth sequence according to an embodiment of the present application;

[0144] FIGS. 29-32 are schematic diagrams of determining a reference signal according to an embodiment of the present application;

[0145] FIG. 33 is a schematic diagram of a communication apparatus according to an embodiment of the present application;

[0146] FIG. 34 is a schematic diagram of another communication apparatus according to an embodiment of the present application. DETAILED DESCRIPTION

[0147] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work under the premise of the present application, all belong to the scope of protection of the present application.

[0148] The reference to “one embodiment” or “some embodiments” or the like in the present application means that the specific features, structures or characteristics described in connection with the embodiment are included in one or more embodiments of the present application. Therefore, the statements “in one embodiment”, “in some embodiments”, “in other some embodiments”, “in other some embodiments” and the like appearing in different places in the specification are not necessarily all referring to the same embodiment, but mean “one or more but not all embodiments”, unless otherwise specifically emphasized. The terms “include”, “contain”, “have” and their variants mean “include but not limited to”, unless otherwise specifically emphasized.

[0149] In the description of the present application, unless otherwise specified, " / " means "or", for example, A / B can mean A or B. "And / or" herein is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist together, and B exists alone. In addition, "at least one" means one or more, and "multiple" means two or more. "At least one of the following" or the like means any combination of the items, including any combination of single item or multiple items. For example, at least one of a, b, or c can mean: 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.

[0150] It can be understood that in the present application, "indication" can include direct indication, indirect indication, display indication, and implicit indication. When describing that certain indication information is used to indicate A, it can be understood that the indication information carries A, directly indicates A, or indirectly indicates A.

[0151] In the present application, the information indicated by the indication information is referred to as the to-be-indicated information. In the specific implementation process, there are many ways to indicate the to-be-indicated information, for example, but not limited to, the to-be-indicated information can be directly indicated, such as the to-be-indicated information itself or an index of the to-be-indicated information, or the to-be-indicated information can be indirectly indicated by indicating other information, where the other information and the to-be-indicated information have an association relationship. It can also only indicate part of the to-be-indicated information, and the other part of the to-be-indicated information is known or agreed in advance. For example, the indication of a specific information can also be achieved by means of the pre-agreed (for example, the protocol stipulates) arrangement order of each information, thereby reducing the indication overhead to a certain extent.

[0152] The to-be-indicated information can be sent as a whole, or can be sent separately into multiple sub-information, and the sending period and / or sending occasion of the sub-information can be the same or different. The specific sending method is not limited by the present application. Wherein the sending period and / or sending occasion of the sub-information can be pre-defined, for example, pre-defined according to the protocol, or can be configured by the transmitting end device by sending configuration information to the receiving end device.

[0153] It can be understood that "sending" and "receiving" in the present application represent the direction of signal transmission. For example, "sending information to XX" can be understood as that the destination of the information is XX, which can include direct sending through the air interface, and also includes indirect sending through the air interface by other units or modules. "Receiving information from YY" can be understood as that the source of the information is YY, which can include direct receiving from YY through the air interface, and also includes indirect receiving from YY through the air interface from other units or modules. "Sending" can also be understood as the "output" of the chip interface, and "receiving" can also be understood as the "input" of the chip interface.

[0154] In other words, sending and receiving can be between devices, such as between network devices and terminal devices, or within devices, such as between components, modules, chips, software modules or hardware modules within a device through a bus, wire or interface.

[0155] It can be understood that the information between the source and the destination of the information transmission may be necessary processing, such as encoding, modulation, etc., but the destination can understand the effective information from the source. Similar expressions in the present application can be similarly understood, and will not be repeated here.

[0156] The communication method provided by the embodiments of the present application can be applied to a third generation partnership project (3rd generation partnership project, 3GPP) related cellular communication system, for example, a fourth generation (4th generation, 4G) communication system, for example, a long term evolution (long term evolution, LTE) communication system, and can also be applied to a fifth generation (5th generation, 5G) communication system, for example, a 5G new radio (new radio, NR) communication system, or various future communication systems and future communication networks. The method provided by the embodiments of the present application can also be applied to a Bluetooth system, a wireless fidelity (wireless fidelity, WiFi) system, a LoRa system or a vehicle-to-vehicle system, a communication system supporting multiple wireless technology fusion, a device-to-device (device-to-device, D2D) system. The method provided by the embodiments of the present application can also be applied to a satellite communication system, wherein the satellite communication system can be integrated with the above communication system. The wireless communication system related in the present application also includes but is not limited to: a narrow band internet of things (narrow band-internet of things, NB-IoT) system, a global system for mobile communications (global system for mobile communications, GSM) system, an enhanced data rate for GSM evolution (enhanced data rate for GSM evolution, EDGE) system, a wideband code division multiple access (wideband code division multiple access, WCDMA) system, a code division multiple access 2000 (code division multiple access, CDMA2000) system, or a time division-synchronous code division multiple access (time division-synchronous code division multiple access, TD-SCDMA) system.

[0157] Please refer to FIG. 1, which is an architecture diagram of a communication system 100 provided by an embodiment of the present application. The application scenario used in the present application is described by taking the architecture of the communication system 100 shown in FIG. 1 as an example. The communication system 100 includes a network device 101 and a terminal device 102. It should be understood that the communication system 100 to which the method of the embodiment of the present application can be applied can include more or fewer network devices or terminal devices. The network device and the terminal device can be hardware, software functionally divided, or a combination of the two. The network device and the terminal device can communicate through other devices or network elements. In the system, the network device 101 can perform data transmission with multiple terminal devices, that is, the network device 101 sends downlink data to the terminal device 102. Of course, the terminal device 102 can also send uplink data to the network device 101. The apparatus provided by the embodiment of the present application can be applied to the network device 101 or the terminal device 102. The network device 101 described above can be any one of the network devices described below, and the terminal device 102 described above can be any one of the terminal devices described below. It can be understood that FIG. 1 only shows one possible communication system architecture to which the embodiment of the present application can be applied. In other possible scenarios, other devices can also be included in the communication system architecture. It should be noted that the method described in the present application can be applied to the communication system shown in FIG. 1.

[0158] (1) Terminal device, also known as user equipment (UE), mobile station (MS), mobile terminal (MT), etc., is a device that provides voice or data connectivity to users. Specifically, it includes a device that provides voice to users, or a device that provides data connectivity to users, or a device that provides voice and data connectivity to users. For example, it can include a handheld device with wireless connection function, or a processing device connected to a wireless modem. The terminal device can communicate with the core network through the radio access network (RAN), exchange voice or data with the RAN, or interact with the RAN for voice and data. Currently, the terminal device can be: a mobile phone, a tablet computer, a notebook computer, a palm computer, a mobile internet device (MID), a wearable device (such as a smart watch, a smart bracelet, a pedometer, etc.), a vehicle-mounted device (such as a car, a bicycle, an electric vehicle, an airplane, a ship, a train, a high-speed rail, etc.), a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a smart home device (such as a refrigerator, a television, an air conditioner, an electricity meter, etc.), a smart robot, a workshop device, a wireless terminal in unmanned driving, a wireless terminal in remote surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, a flight device (such as a smart robot, a hot air balloon, a drone, an airplane), etc. The terminal device can also be other devices with terminal functions, for example, the terminal device can also be a device that plays a terminal function in D2D communication.The terminal device can also include a vehicle to everything (V2X) terminal device, a machine to machine / machine-type communications (M2M / MTC) terminal device, an internet of things (IoT) terminal device, a light terminal device, a reduced capability UE (REDCAP UE), a subscriber unit, a subscriber station, a mobile station, a remote station, an access point (AP), a remote terminal, an access terminal, a user terminal, a user agent, or a user device, a drone device, etc. For example, it can include a mobile phone (or called "cellular" phone), a computer with a mobile terminal device, a portable, pocket, handheld, built-in computer mobile device, etc. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), etc. It also includes limited devices, such as devices with lower power consumption, or devices with limited storage capacity, or devices with limited computing capacity, etc. For example, it includes information sensing devices such as bar code, radio frequency identification (RFID), sensor, global positioning system (GPS), laser scanner, etc. In this application, the terminal device with wireless transceiver function and the chip that can be provided in the terminal device are collectively referred to as terminal device.

[0159] It should be noted that the terminal device can be a device or apparatus with a chip, or a device or apparatus integrated with a circuit, or a chip, module or control unit in the above-mentioned device or apparatus, and the specific application is not limited.

[0160] (2) The network device is a device deployed in a wireless access network to provide wireless communication functions for terminal devices. The network device can also be referred to as a radio access network (RAN) entity, an access node, a network node, or a communication apparatus, etc.

[0161] Specifically, the network device can be an access network device of a third generation partnership project (3GPP) related cellular system. For example, a fourth-generation (4G) mobile communication system, or a 5G mobile communication system. The network device can also be an access network device in an open access network (open RAN, O-RAN or ORAN) or a cloud radio access network (CRAN). Alternatively, the network device can also be an access network device in a communication system obtained by fusing two or more of the above communication systems.

[0162] The network device includes, but is not limited to, an evolved Node B (eNB), a radio network controller (RNC), a Node B (NB), a base station controller (BSC), a base transceiver station (BTS), a home base station (for example, a home evolved NodeB, or home Node B, HNB), a baseband unit (BBU), an access point (AP) in a wireless fidelity (WiFi) system, a macro base station, a micro base station, a wireless relay node, a donor node, a wireless controller in a CRAN scenario, a wireless backhaul node, a transmission point (TP), or a transmission reception point (TRP). The network device can also be an access network device in a 5G mobile communication system. For example, a next generation NodeB (gNB) in a new radio (NR) system, a TRP, a TP, or one or a group (including multiple antenna panels) of antenna panels of a base station in a 5G mobile communication system. Alternatively, the network device can also be a network node constituting a gNB or a transmission point. For example, a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), etc. The CU and the DU can be separately arranged, or can be included in the same network element. For example, a BBU. The RU can be included in a radio frequency device or a radio frequency unit. For example, in a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH). Alternatively, the network device can also be a server, a wearable device, a vehicle or a vehicle-mounted device, etc. For example, in V2X technology, the network device can be a road side unit (RSU).

[0163] It should be noted that in different systems, the CU (or CU-CP and CU-UP), DU or RU can also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, the CU can also be referred to as an open central unit (O-CU) or an open CU, the DU can also be referred to as an open distributed unit (O-DU), the central unit control plane (CU-CP) can also be referred to as an open central unit control plane (O-CU-CP) or an open CU-CP, the central unit user plane (CU-UP) can also be referred to as an open central unit user plane (O-CU-UP) or an open CU-UP, and the RU can also be referred to as an open radio unit (O-RU), which is not limited in the present application. Any one of the CU, CU-CP, CU-UP, DU and RU in the present application can be realized by a software module, a hardware module, or a combination of a software module and a hardware module.

[0164] In some deployments, the CU implements part of the functions of the gNB, and the DU implements part of the functions of the gNB, for example, the CU implements the functions of the radio resource control (RRC) layer, the packet data convergence protocol (PDCP) layer, and the DU implements the functions of the radio link control (RLC) layer, the media access control (MAC) layer and the physical (PHY) layer. Since the information of the RRC layer will eventually become the information of the PHY layer, or be transformed from the information of the PHY layer, under this architecture, high-layer signaling such as RRC layer signaling or PDCP layer signaling can also be considered to be sent by the DU, or sent by the DU+RU. It can be understood that the network device can be a CU node, or a DU node, or a device including a CU node and a DU node. In addition, the CU can be divided into a network device in the access network RAN, or the CU can be divided into a network device in the core network CN, which is not limited here.

[0165] Optionally, the network device can also be a core network device. The core network device is responsible for access control, registration management, service management, mobility management, etc. of the terminal device accessing the network. For example, the core network device is an access and mobility management function (AMF) network element, a user plane function (UPF) network element, a session management (SMF) network element, or a policy control function (PCF) network element.

[0166] It should be noted that the network device can be the device or apparatus shown above, or a component (for example, a chip), a module, or a unit in the device or apparatus shown above, and the specific application does not make any limitation.

[0167] In order to better understand the scheme provided by the embodiments of the present application, some terms, concepts or processes related to the embodiments of the present application will be introduced first.

[0168] I. Orthogonal frequency division multiplexing technology with discrete Fourier transform spread spectrum

[0169] Please refer to FIG. 2, which is a schematic diagram of a generation process of a discrete Fourier transform-spreading-orthogonal frequency division multiplexing (DFT-s-OFDM) transmitter, which can include one or more of the following steps: the sending end first generates source bits, then performs channel coding and quadrature amplitude modulation (QAM) to generate modulation symbols, then performs resource element (RE) mapping, discrete Fourier transform (DFT), precoding, inverse fast Fourier transform (IFFT), and cyclic prefix (CP) processing on the generated modulation symbols, finally obtains a DFT-s-OFDM signal, and finally sends the DFT-s-OFDM signal through an antenna. Correspondingly, after receiving the DFT-s-OFDM signal, the receiving end demodulates through inverse processing at the receiving end, which will not be described in detail here. As can be seen from FIG. 2, compared with orthogonal frequency division multiplexing (OFDM), DFT-s-OFDM has an additional DFT processing before the OFDM processing process. Through this operation, the DFT-s-OFDM signal has the characteristics of a single carrier, and has a PAPR much lower than that of a multi-carrier signal such as OFDM. Referring to FIG. 3, which is a schematic diagram of the PAPR of a single-carrier and multi-carrier signal, as can be seen from FIG. 3, under the same power amplifier, DFT-s-OFDM can provide greater output power and higher power amplifier efficiency, thereby achieving the purpose of improving coverage and reducing energy consumption. The coverage and power consumption advantages of DFT-s-OFDM are particularly evident on the terminal device side, and DFT-s-OFDM can be applied to uplink transmission.

[0170] The coverage and power consumption advantages of single-carrier waveforms are particularly evident on the terminal device side and are mainly applied to uplink transmission. For a single-carrier signal, as the modulation order increases, the corresponding PAPR also increases, and the coverage range also decreases, as shown in FIG. 4, which is a schematic diagram of the coverage range of a single-carrier waveform under different modulations. Therefore, for edge coverage scenarios, low-order modulation signals are generally used.

[0171] II. Cyclic prefix orthogonal frequency division multiplexing

[0172] DFT-s-OFDM is a variant of cyclic prefix-orthogonal frequency division multiplexing (CP-OFDM). CP-OFDM is a modulation method that maps modulated symbols to frequency domain subcarriers, then performs inverse Fourier transform, converts the frequency domain signal to time domain signal, and adds a cyclic prefix to obtain a transmitted signal. DFT-s-OFDM is a modulation method that performs discrete Fourier transform on a certain number of modulated symbols, converts them to the frequency domain, then filters or does not filter the frequency domain signal and directly maps it to the frequency domain subcarrier, then performs inverse discrete Fourier transform, converts the frequency domain signal to the time domain signal, and adds a cyclic prefix to obtain a transmitted signal.

[0173] III. Filtered single carrier-quadrature amplitude modulation

[0174] Filtered single carrier-quadrature amplitude modulation (filter SC-QAM) is compatible with existing single carrier receivers, has the advantage of low complexity in generating large bandwidth signals, and has a lower PAPR than ordinary single carrier waveforms. It has good application prospects in extreme coverage scenarios. Please refer to FIG. 5, which is a schematic diagram of the generation process of a filter SC-QAM transmitter.

[0175] Channel coding (such as polar coding, low-density parity check (LDPC) coding) outputs 0 and 1 information bits. These bits are input to the complex modulator as complex modulated symbols. After the modulator, modulated symbols are generated. Under large bandwidth, pi / 2-binary phase shift keying (BPSK) modulation is generally used to maximize coverage benefits.

[0176] Intra-symbol CP addition: refers to adding a number of modulated symbols in front of each equivalent OFDM symbol. Similar to the CP property of traditional OFDM signals, the signal after adding the CP can effectively reduce ISI when passing through a multipath delay spread channel. The CP length of the time domain generated signal is the same as the CP length of the signal generated based on fast Fourier transform (FFT) after experiencing upsampling and possible downsampling, facilitating unified length CP removal operations on the receiving side, which requires calculating the required CP length based on the upsampling and downsampling rates.

[0177] Upsampling, downsampling: for the upsampling processing, a number of 0s can be directly inserted in the middle of two original signals; the downsampling processing is a processing opposite to the upsampling processing, and is specifically implemented by equally-spaced decimation on the signal to be processed. The OFDM time-domain signal is essentially a synthesized signal under a sampling rate related to the number of FFT points, and the single-carrier signal generated in the time domain needs to match the OFDM sampling rate to be able to be uniformly received by the receiving end. In addition, since the main purpose of the downsampling is to process the symbol rate of the signal into the same symbol rate as the OFDM (based on FFT), the operation of the downsampling is an optional step. When the symbol rate of the signal after the convolution filter of the upsampling is equal to the symbol rate of the FFT sampling, the downsampling can not be performed, or it can be understood that the downsampling rate is equal to 1.

[0178] Shaping filter: the pulse shaping filter adopts a root-square raise cosine (RRC) filter with a certain spreading factor (or referred to as a roll-off factor or a roll-off coefficient), and the selection of the spreading factor is related to the amount of data actually to be transmitted and the allocated frequency domain bandwidth. Please refer to FIG. 6, which is a schematic diagram of a shaping filter. If the amount of data (the number of modulation symbols) to be transmitted is N, and the frequency domain resource with power lifting after shaping is M (the number of OFDM subcarriers or resource elements), the roll-off factor can be calculated as: β = (N-M) / M.

[0179] In addition to the RRC filter, other filter functions can also be used to complete the corresponding processing, and the use of other filters will affect (improve or worsen) the PAPR, the out-of-band power, the error vector magnitude (EVM), the block error ratio (BLER), and the like. For the receiving end, the filter response can be regarded as part of the channel response, and the pilot signal and the data signal are processed in the same way, and the receiving end can eliminate the influence of the filter in the process of channel estimation and equalization. By using the characteristics of the Fourier transform and the pi / 2-BPSK modulation signal, the roll-off factor of the filter can be set to 1 to obtain the best PAPR benefit, and the signal can be recovered at the receiving end.

[0180] As shown in Table 1, the parameters of the filter SC-QAM under different upsampling rates K and downsampling rates L.

[0181] Table 1

[0182] It should be noted that the method described in the embodiments of the present application can be applied before the CP is added within the symbol and after the symbol is modulated.

[0183] Four, demodulation reference signal

[0184] A demodulation reference signal (DMRS) is a kind of reference signal used for equivalent channel estimation at the receiving end, which is used to estimate the data channel. As an example, it is generally divided into physical uplink shared channel (PUSCH) DMRS and physical uplink control channel (PUCCH) DMRS. The protocol specifies that there are mainly two formats of DMRS: Type 1 DMRS and Type 2 DMRS. The density of Type 1 DMRS in the frequency domain is 1 / 2, the single-symbol Type 1 DMRS antenna port number is port0-port3, and the double-symbol Type 1 DMRS antenna port number is port0-port7. The density of Type 2 DMRS in the frequency domain is 1 / 3, the single-symbol Type 2 DMRS antenna port number is port0-port5, and the double-symbol Type 2 DMRS antenna port number is port0-port11.

[0185] For single-symbol Type 1 DMRS, 4 ports are supported, with antenna port numbers port 0~port 3, as shown in (a) of FIG. 7, the 4 DMRS ports are divided into 2 code division multiplexing groups (CDM groups), wherein CDM group 0 contains port 0 and port 1; CDM group 1 contains port 2 and port 3. CDM group 0 and CDM group 1 are frequency division multiplexed (mapped on different frequency domain resources). The DMRS ports contained in a CDM group are mapped on the same time-frequency resource. The reference signals corresponding to the DMRS ports contained in a CDM group are distinguished by superimposing an orthogonal cover code (OCC), thereby ensuring the orthogonality of the DMRS ports in the CDM group, thereby suppressing the interference between the DMRS transmitted on different antenna ports. Specifically, port 0 and port 1 are located in the same resource element (RE), and are mapped in the frequency domain in the form of a comb, that is, the adjacent frequency domain resources occupied by port 0 and port 1 are separated by one subcarrier. For a DMRS port, the adjacent 2 REs occupied correspond to an OCC code word sequence with a length of 2. For example, for subcarrier 0 and subcarrier 2, port 0 and port 1 use a set of OCC code word sequences with a length of 2 ('+1+1' and '+1-1'). It should be noted that in the embodiments of the present application,'' in the OCC code represents on the same symbol. Similarly, port 2 and port 3 are located in the same resource element (RE), and are mapped in the frequency domain on the REs not occupied by port 0 and port 1 in the form of a comb. For subcarrier 1 and subcarrier 3, port 2 and port 3 use a set of OCC code word sequences with a length of 2 ('+1+1' and '+1-1').

[0186] For the dual-symbol Type 1 DMRS, 8 ports are supported, and the antenna port numbers are port 0~port 7, as shown in (b) of FIG. 7. The 8 DMRS ports are divided into 2 code division multiplexing (CDM) groups, wherein CDM group 0 contains port 0, port 1, port 4 and port 5; and CDM group 1 contains port 2, port 3, port 6 and port 7. The CDM group 0 and the CDM group 1 are frequency division multiplexed, and the reference signals corresponding to the DMRS ports contained in the CDM group are distinguished by OCC. Specifically, port 0, port 1, port 4 and port 5 are located in the same resource element (RE), and are mapped in the frequency domain in the form of a comb, that is, the adjacent frequency domain resources occupied by port 0, port 1, port 4 and port 5 are separated by one subcarrier. For a DMRS port, the adjacent 2 subcarriers and 2 OFDM symbols occupied correspond to an OCC code word sequence with a length of 4. For example, for subcarrier 0 and subcarrier 2 corresponding to OFDM symbol 1 and OFDM symbol 2, port 0, port 1, port 4 and port 5 adopt a set of OCC codes with a length of 4 ('+1+1'+1+1' / +1-1'+1-1' / +1+1'-1-1' / +1-1'-1+1'). It should be noted that in the OCC code in the embodiment of the present application,'' represents on the same symbol. Similarly, port 2, port 3, port 6 and port 7 are located in the same resource element (RE), and are mapped on the subcarriers not occupied by port 0, port 1, port 4 and port 5 in the form of a comb in the frequency domain. For example, for subcarrier 1 and subcarrier 3 corresponding to OFDM symbol 1 and OFDM symbol 2, port 2, port 3, port 6 and port 7 adopt a set of OCC codes with a length of 4 ('+1+1'+1+1' / +1-1'+1-1' / +1+1'-1-1' / +1-1'-1+1').

[0187] For single-symbol Type 2 DMRS, 6 ports are supported, with antenna port numbers port0~port5, as shown in (a) of FIG. 8, the 6 DMRS ports are divided into 3 code division multiplexing groups (CDM groups), the CDM groups are frequency division multiplexed, and the reference signals corresponding to the DMRS ports contained in the CDM group are orthogonalized by OCC. CDM group 0 contains port 0 and port 1; CDM group 1 contains port 2 and port 3; and CDM group 2 contains port 4 and port 5. The CDM groups are frequency division multiplexed (mapped on different frequency domain resources). The reference signals corresponding to the DMRS ports contained in the CDM group are mapped on the same time-frequency resource. The reference signals corresponding to the DMRS ports contained in the CDM group are distinguished by OCC. For a DMRS port, the corresponding DMRS reference signal is mapped in the frequency domain in multiple resource subblocks containing 2 consecutive subcarriers, and the adjacent resource subblocks are spaced by 4 subcarriers in the frequency domain. Specifically, port 0 and port 1 are located in the same resource element (RE), and are resource mapped in the form of a comb. Taking a frequency domain resource granularity of 1 RB as an example, port 0 and port 1 occupy subcarrier 0, subcarrier 1, subcarrier 6, and subcarrier 7. Port 2 and port 3 occupy subcarrier 2, subcarrier 3, subcarrier 8, and subcarrier 9. Port 4 and port 5 occupy subcarrier 4, subcarrier 5, subcarrier 10, and subcarrier 11.

[0188] For double-symbol Type 2 DMRS, 12 ports are supported, whose antenna port numbers are port0~port11, as shown in (b) of FIG. 8. The 12 DMRS ports are divided into 3 CDM groups, and the reference signals corresponding to the DMRS ports in the CDM groups are frequency division multiplexed, and the orthogonality of the reference signals corresponding to the DMRS ports in the CDM group is ensured by OCC. CDM group 0 contains port 0, port 1, port 6 and port 7; CDM group 1 contains port 2, port 3, port 8 and port 9; and CDM group 2 contains port 4, port 5, port 10 and port 11. The CDM groups are frequency division multiplexed (mapped on different frequency domain resources). The reference signals corresponding to the DMRS ports in the CDM group are mapped on the same time-frequency resource. The reference signals corresponding to the DMRS ports in the CDM group are distinguished by OCC. For a DMRS port, the DMRS reference signal corresponding to the DMRS port is mapped in the frequency domain in a plurality of resource subblocks containing 2 contiguous subcarriers, and the adjacent resource subblocks are spaced apart by 4 subcarriers in the frequency domain. Specifically, the ports in a CDM group are located in the same resource element (RE) and are mapped in the frequency domain in the form of a comb. Taking a frequency domain resource granularity of 1 RB as an example, port 0, port 1, port 6 and port 7 occupy subcarriers 0, 1, 6 and 7 corresponding to OFDM symbol 1 and OFDM symbol 2. Port 2, port 3, port 8 and port 9 occupy subcarriers 2, 3, 8 and 9 corresponding to OFDM symbol 1 and OFDM symbol 2. Port 4, port 5, port 10 and port 11 occupy subcarriers 4, 5, 10 and 11 corresponding to OFDM symbol 1 and OFDM symbol 2.

[0189] In addition to the DMRS type, the protocol also stipulates the DMRS sequence type used under different waveforms.

[0190] For the CP-OFDM waveform, the DMRS uses a pseudo-random sequence-gold sequence to generate. The nth element in the reference signal sequence can be generated by the following formula:

[0191] wherein the pseudo-random sequence c(n) can be a gold sequence with a sequence length of 31, and for an output sequence c(n) with a length of M PN , n = 0, 1, … M PN-1, can be defined as: c(n) = (x1(n+N2)+x2(n+N2))mod 2; x1(n+31) = (x1(n+3)+x1(n))mod 2; x2(n+31) = (x2(n+3)+x2(n+2)+x2(n+1)+x2(n))mod 2;

[0192] where N C = 1600. The first m sequence x1(n) can be initialized as x1(0) = 1, x1(n) = 0, n = 1, 2, …, 30. The second m sequence x2(n) is initialized by the parameter c init . c init can be defined as:

[0193] where l represents an OFDM symbol index contained in a time slot, where i represents a time slot index in a system frame, which can be configured by high layer signaling. which is related to cell ID (identification), and can be equal to the cell ID, is an initialization parameter, and can be 0 or 1.

[0194] For the DFT-s-OFDM waveform, the DMRS uses two types of sequences. When using single-carrier types such as DFT-s-OFDM, the Typ1 DMRS type is supported to maintain the low PAPR characteristics of the single-carrier signal.

[0195] The first type: when non-pi / 2 BPSK modulation is used, the DMRS uses zc sequence generation, which is generated as follows: r u,v (n) = s q (n mod N ZC ), n = 0, 1, …, M ZC -1.

[0196] where M ZC is the sequence length, N ZC is the largest prime number not exceeding M ZC , and q is determined by the group number u and the sequence number v.

[0197] The second type: when pi / 2 BPSK modulation is used, the DMRS uses gold sequence generation, and similarly to CP-OFDM, a gold sequence c(n) of 0, 1 bits is generated, and then mapped into a pi / 2 BPSK modulated DMRS sequence, as shown in the following formula:

[0198] As shown in FIG. 5, when the single carrier type is SC-QAM, the whole process is processed in the time domain, there is no frequency domain resource mapping process, and a single antenna port is configured. When there are multiple user transmissions, time division transmission can only be performed between different users. FIGS. 7 and 8 correspond to DMRS multi-port support of CP-OFDM or DFT-s-OFDM waveforms, which perform resource mapping before discrete inverse Fourier transform. The SC-QAM waveform is generated in the time domain and cannot be mapped in the same way as the CP-OFDM or DFT-s-OFDM waveform. Therefore, in a scenario where the coverage requirement is relatively high and the single carrier type is SC-QAM, how to implement multi-port transmission and improve the time-frequency resource utilization is a technical problem that persons skilled in the art are trying to solve. To solve the above problems, the embodiments of the present application propose the following solutions.

[0199] Taking the reference signal type as Type 1 DMRS and the antenna port number as an even number as an example for description. Please refer to FIG. 9, which is a schematic diagram of a communication method provided by an embodiment of the present application. The method includes but is not limited to the following steps:

[0200] S901: The network device sends first indication information.

[0201] For example, the network device sends the first indication information to the terminal device. Correspondingly, the terminal device receives the first indication information from the network device, and determines a first sequence based on the first indication information. For example, the first sequence can be one sequence or a sequence pair, and the sequence pair includes two sequences.

[0202] The first indication information includes one or more of the following: sequence type, antenna port number, or length of the first sequence. For example, the sequence type can include a Gold sequence or a Golay sequence. When the sequence type is a Golay sequence, the first indication information can further include a full permutation root value, wherein the full permutation root value is used to determine a first permutation combination, and the first permutation combination is used to determine the first sequence. The full permutation root value can also be agreed upon by a protocol or predefined. In an example, the full permutation root value c init satisfies the following formula, Correspondingly, the terminal device determines the first permutation combination through the full permutation root value. When the sequence type is a Golay sequence, the first indication information can further include the first permutation combination used to determine the first sequence. Optionally, the first indication information can further include the number of OFDM symbols occupied by the reference signal in the time domain. For example, the reference signal is a DMRS, and the first indication information further includes the number of OFDM symbols occupied by the DMRS in the time domain, which can be 1 or 2. Optionally, the first indication information can further include an additional DMRS. It should be noted that the embodiments of the present application take the DMRS as an example for description, and the reference signal can also be a phase tracking reference signal (PTRS), a physical random access channel (PRACH), or a sounding reference signal (SRS), which is not limited by the embodiments of the present application.

[0203] wherein the antenna port number is even. For example, when the reference signal is a single-symbol Type 1 DMRS, the antenna port number can be port 0 or port 2; for example, when the reference signal is a double-symbol Type 1 DMRS, the antenna port number can be port 0, port 2, port 4, or port 6.

[0204] wherein the length of the first sequence can be determined by the size of the scheduled frequency domain resource, and / or reference signal frequency domain density information. For example, the reference signal frequency domain density information is 1 / 2, and the size of the scheduled frequency domain resource is n PRB , n PRB , wherein n PRB represents the number of physical resource blocks (PRBs), and the length of the first sequence N = 12n

[0205] In a possible implementation, the method further includes: the network device sends configuration information of the first signal to the terminal device, and the configuration information includes one or more of the following: time domain resource, frequency domain resource, stream number, or waveform.

[0206] wherein the first signal is a signal carried in a PUSCH. The configuration information can also be described as resource information.

[0207] The time domain resource includes one or more of the following: a system frame number, a transmission time slot, an OFDM symbol starting position, or a time domain OFDM number; for example, the time domain OFDM number can include a number of DMRS symbols. Optionally, the network device indicates the time domain resource through a start and length indicator value (SLIV) field in downlink control information (DCI). Please refer to FIG. 10, which is a schematic diagram of a time domain resource according to an embodiment of the present application. The time domain resource includes a transmission time slot and an OFDM symbol starting position.

[0208] The frequency domain information includes one or more of the following: a number of physical resource blocks (PRBs), a bandwidth part (BWP), a frequency band, identification information of a serving cell (serving cell ID), a center frequency point, and a sub-carrier spacing (SCS). The identification information of the serving cell can include a cell index. Optionally, the frequency domain information can be carried in RRC signaling, DCI, or a media access control (MAC) control element (CE), etc.

[0209] The waveform can include CP-OFDM, DFT-s-OFDM, or filter SC-QAM. When the waveform is filter SC-QAM, the network device can further configure corresponding parameter information, which includes one or more of the following: a configuration index, a number of data symbols (system bandwidth), a roll-off factor, a number of FFT points, a CP length, an up-sampling rate, or a down-sampling rate. The CP length can refer to a time domain CP length superimposed on one OFDM symbol, or a CP length within a symbol. The up-sampling rate can also be referred to as an up-sampling multiple, and the down-sampling rate can also be referred to as a down-sampling multiple.

[0210] The number of streams can be related to the waveform. For example, when the waveform is CP-OFDM, the number of streams can be greater than or equal to 1; when the waveform is DFT-s-OFDM or filter SC-QAM, the number of streams is equal to 1.

[0211] S902: The terminal device determines a target sequence by performing first processing on the first sequence based on the reference signal pattern.

[0212] For example, the reference signal pattern can be as shown in FIG. 7.

[0213] For example, when the reference signal is a single-symbol Type 1 DMRS and the antenna port number is port 0 or port 2, the reference signal pattern can be as shown in (a) of FIG. 7; for another example, when the reference signal is a double-symbol Type 1 DMRS and the antenna port number is port 0, port 2, port 4 or port 6, the reference signal pattern can be as shown in (b) of FIG. 7. The reference signal pattern includes reference signal frequency domain density information, for example, when the reference signal is a DMRS and the reference signal pattern is as shown in FIG. 7, the reference signal frequency domain density information is 1 / 2.

[0214] The terminal device determines the target sequence based on the first sequence and the reference signal pattern, including: determining the target sequence, the target sequence including two first sequences. For example, the terminal device can copy the first sequence to a first position of the first sequence to determine the target sequence, the first position including a head end of the first sequence and / or a tail end of the first sequence, in other words, copying the first sequence to the head end or the tail end of the first sequence to determine the target sequence. In this application, "copying" can also be described as "copying", "copying" and the like, and the embodiments of this application are not limited. When the reference signal frequency domain density information is 1 / 2 and the length of the first sequence is N, the length of the target sequence is 2N, where N is a positive integer greater than 1. Since the time domain signal repetition corresponds to the oversampling difference processing of the frequency domain, it is equivalent to the comb mapping of the frequency domain reference signal symbol. When the reference signal frequency domain density information is 1 / 2, it is equivalent to twice repetition of the first sequence to determine the target sequence. Please refer to FIG. 11, which is a schematic diagram of determining a target sequence provided by an embodiment of the application, as shown in FIG. 11, the length of the first sequence is N, and the target sequence is determined by copying the first sequence to the tail end of the first sequence, and the length of the target sequence is 2N.

[0215] In the above method, the above process can be understood as a process of repeating and expanding the first sequence to determine the target sequence, which is equivalent to comb mapping of the frequency domain reference signal symbol, further realizing multi-port transmission and improving time-frequency resource utilization.

[0216] S903: The terminal device performs second processing on the target sequence in the time domain according to a first rule to determine the reference signal.

[0217] The reference signal is a signal after time domain mapping, and the first rule is related to the orthogonal code corresponding to the antenna port number and / or the reference signal pattern. Optionally, the orthogonal code corresponding to the antenna port number can be an OCC code corresponding to the antenna port number.

[0218] For example, when the reference signal is single-symbol Type 1 DMRS, the antenna port number is port 0, the orthogonal code corresponding to the antenna port number is (‘+1, +1’), and it should be noted that in the embodiments of the present application, ‘’ in the orthogonal code indicates that on the same symbol, the antenna port number is port 2, the orthogonal code corresponding to the antenna port number is (‘+1, +1’); when the reference signal is double-symbol Type 1 DMRS, the antenna port number is port 0, the orthogonal code corresponding to the antenna port number is (‘+1+1’ ‘+1+1’), the antenna port number is port 2, the orthogonal code corresponding to the antenna port number is (‘+1+1’ ‘+1+1’), the antenna port number is port 4, the orthogonal code corresponding to the antenna port number is (‘+1+1’ ‘-1-1’), and the antenna port number is port 6, the orthogonal code corresponding to the antenna port number is (‘+1+1’ ‘-1-1’).

[0219] The terminal device performs second processing on the target sequence in the time domain according to the first rule to determine the reference signal, including: the terminal device multiplies the target sequence by a mapping parameter in the time domain to obtain the reference signal, and the mapping parameter is determined based on the first rule. The first rule includes one or more of the following: a relationship between the symbol index of the reference signal, the first parameter and the second parameter.

[0220] For example, the first rule includes a relationship between the symbol index of the reference signal, the first parameter and the second parameter, including:

[0221] Wherein, l=0,1 represents the OFDM symbol index of the reference signal; k is 0~2N-1; N represents the length of the first sequence, Δ represents the first parameter, t represents the second parameter, s l (k) represents the time domain sequence index corresponding to the lth OFDM symbol, and the time domain sequence can be the target sequence; y l (k) represents the kth reference symbol after time domain mapping.

[0222] wherein the first parameter and the second parameter are related to the antenna port number. The first parameter and the second parameter are related to the antenna port number, including one or more of the following: when the antenna port number is port 0, the first parameter is 0 and the second parameter is 0; when the antenna port number is port 2, the first parameter is 1 and the second parameter is 0; when the antenna port number is port 4, the first parameter is 0 and the second parameter is 1; or when the antenna port number is port 6, the first parameter is 1 and the second parameter is 1. For example, refer to Table 2, which shows the relationship between the antenna port number, the CDM group to which the antenna port number belongs, the first parameter, and the second parameter. Optionally, the relationship between the antenna port number and the first parameter and the second parameter can be pre-defined by a protocol or indicated by a network device.

[0223] Table 2

[0224] wherein when the sequence type is a Golay sequence, the antenna port number is port 0 or port 2. For example, when the sequence type is a double-symbol Golay sequence, the antenna port number is double-symbol port 0 or double-symbol port 2. Optionally, it can be agreed by a protocol or indicated by a network device that when the sequence type is a double-symbol Golay sequence, the antenna port number is double-symbol port 0 or double-symbol port 2. Since the orthogonal codes corresponding to double-symbol port 0 and double-symbol port 2 are the same, in this way, the complementarity of the Golay sequence can be ensured, thereby ensuring the orthogonality.

[0225] For example, the terminal device performs the second processing on the target sequence in the time domain according to the first rule to determine the reference signal, including: the terminal device multiplies the target sequence by a mapping parameter in the time domain to obtain the reference signal, the mapping parameter being determined based on the first rule. The process of determining the mapping parameter will be illustrated below, as follows:

[0226] In one example, referring to (a) in FIG. 13, when the reference signal is a single-symbol Type 1 DMRS and the antenna port number is port 0, the first parameter Δ is determined to be 0, the second parameter t is determined to be 0, the OFDM symbol index of the reference signal is l = 0, and according to formula (1), is determined to be That is, the mapping parameter is determined to be 1, and the terminal device multiplies the target sequence by the mapping parameter in the time domain to obtain the reference signal can include: the terminal device multiplies the target sequence by 1 in the time domain to obtain the reference signal.

[0227] In another example, referring to (a) in FIG. 14, when the reference signal is a single-symbol Type 1 DMRS and the antenna port number is port 2, the first parameter Δ is determined to be 1, the second parameter t is determined to be 0, the OFDM symbol index of the reference signal is l = 0, and according to formula (1), is determined to be That is, the mapping parameter is determined to be Since the frequency domain equivalent reference signal symbol starts from the second subcarrier in the BWP starting RB, the equivalent time domain symbol needs to be multiplied by the mapping parameter Therefore, the terminal device multiplying the target sequence by the mapping parameter in the time domain to determine the reference signal can include that the terminal device multiplying the target sequence by to obtain the reference signal.

[0228] It should be noted that the above describes that the terminal device determines the target sequence by performing first processing on the first sequence based on the reference signal pattern, and then performs second processing on the target sequence in the time domain according to the first rule to determine the reference signal, that is, the first sequence is first repeated and expanded, and then the sequence after the repeated expansion is multiplied by the mapping parameter to determine the reference signal. When the mapping parameter is 1 or -1, the terminal device can also first multiply the first sequence by the mapping parameter, and then expand the sequence multiplied by the mapping parameter. The present application embodiment is not limited.

[0229] In the above method, the above processing process is equivalent to determining that the starting position of the frequency domain reference signal symbol is on the first subcarrier in the partial bandwidth starting resource block, thereby realizing multi-port transmission and improving the time-frequency resource utilization rate.

[0230] The above describes the case where the reference signal type is single-symbol Type1 DMRS and the first sequence includes one sequence. The following will describe the case where the reference signal type is double-symbol Type1 DMRS, the first sequence includes a sequence pair, the sequence pair includes two sequences, which are sequence 1 and sequence 2, and the target sequence includes sequence 3 and sequence 4, as follows:

[0231] Among them, the terminal device determines the target sequence by performing first processing on the first sequence based on the reference signal pattern, including: determining sequence 3, sequence 3 including two sequence 1; determining sequence 4, sequence 4 including two sequence 2. This process can be understood as: copying sequence 1 to the beginning or end of sequence 1 to determine sequence 3, and copying sequence 2 to the beginning or end of sequence 2 to determine sequence 4. For example, copy sequence 1 to the beginning of sequence 1 to determine sequence 3, and copy sequence 2 to the beginning of sequence 2 to determine sequence 4; for example, copy sequence 1 to the end of sequence 1 to determine sequence 3, and copy sequence 2 to the end of sequence 2 to determine sequence 4.

[0232] In an example, referring to FIG. 12, FIG. 12 is a schematic diagram of another example of determining a target sequence according to an embodiment of the present application. As shown in FIG. 12, the first sequence is a sequence pair, the sequence pair includes two sequences, the two sequences are sequence 1 and sequence 2 respectively, the length of sequence 1 and sequence 2 is N, the sequence 3 is determined by copying sequence 1 to the end of sequence 1, the sequence 4 is determined by copying sequence 2 to the end of sequence 2, the target sequence is a sequence pair, the sequence pair includes two sequences, the two sequences are sequence 3 and sequence 4 respectively, the length of sequence 3 and sequence 4 is 2N.

[0233] In the example, the terminal device performs second processing on the target sequence in the time domain according to the first rule to determine the reference signal can include that the terminal device performs second processing on sequence 3 and sequence 4 in the time domain according to the first rule to determine the reference signal. The terminal device performs second processing on sequence 3 and sequence 4 in the time domain according to the first rule to determine the reference signal can include that the terminal device multiplies sequence 3 by a first mapping parameter and multiplies sequence 4 by a second mapping parameter in the time domain according to the first rule to determine the reference signal, the first mapping parameter and the second mapping parameter are determined based on the first rule.

[0234] In another example, referring to (b) in FIG. 13, the reference signal is a double-symbol Type 1 DMRS, the antenna port number is port0, the first sequence includes a sequence pair, the sequence pair includes sequence 1 and sequence 2, the target sequence includes sequence 3 and sequence 4, the first parameter Δ is determined to be 0, the second parameter t is determined to be 0, according to formula (1), when the OFDM symbol index l of the reference signal is 0, that is, the first mapping parameter is determined to be 1, when the OFDM symbol index l of the reference signal is 1, that is, the second mapping parameter is determined to be 1, the terminal device multiplies sequence 3 by the first mapping parameter and multiplies sequence 4 by the second mapping parameter in the time domain according to the first rule to determine the reference signal can include that the terminal device multiplies sequence 3 by 1 and multiplies sequence 4 by 1 in the time domain to determine the reference signal.

[0235] In another example, referring to (b) in FIG. 14, the reference signal is a double-symbol Type 1 DMRS, the antenna port number is port2, the first sequence includes a sequence pair, the sequence pair includes sequence 1 and sequence 2, the target sequence includes sequence 3 and sequence 4, the first parameter Δ is determined to be 1, the second parameter t is determined to be 0, according to formula (1), when the OFDM symbol index l of the reference signal is 0, that is, the first mapping parameter is determined to be Since the frequency domain equivalent reference signal symbol starts from the second subcarrier in the BWP starting RB, the first mapping parameter needs to be multiplied on the equivalent time domain symbol When the OFDM symbol index of the reference signal is l = 0, That is, the first mapping parameter is determined as 1, and the second mapping parameter is determined as -1. Since the frequency domain equivalent reference signal symbol starts from the second subcarrier in the BWP starting RB, the equivalent time domain symbol needs to be multiplied by the second mapping parameter Therefore, the terminal device can determine the reference signal by multiplying the sequence 3 by the first mapping parameter and the sequence 4 by the second mapping parameter in the time domain according to the first rule, which can include that the terminal device determines the reference signal by multiplying the sequence 3 by 1 and the sequence 4 by -1 in the time domain. And multiplying the sequence 4 by The reference signal is determined.

[0236] In another example, as shown in FIG. 15, when the reference signal is a double-symbol Type 1 DMRS and the antenna port number is port4, the first sequence includes a sequence pair including a sequence 1 and a sequence 2, the target sequence includes a sequence 3 and a sequence 4, the first parameter Δ is determined as 0, the second parameter t is determined as 1, and according to the formula (1), it is determined that when the OFDM symbol index of the reference signal is l = 0, That is, the first mapping parameter is determined as 1, and the second mapping parameter is determined as -1. That is, the first mapping parameter is determined as 1, and the second mapping parameter is determined as -1.

[0237] In another example, as shown in FIG. 16, when the reference signal is a double-symbol Type 1 DMRS and the antenna port number is port6, the first sequence includes a sequence pair including a sequence 1 and a sequence 2, the target sequence includes a sequence 3 and a sequence 4, the first parameter Δ is determined as 1, the second parameter t is determined as 1, and according to the formula (1), it is determined that when the OFDM symbol index of the reference signal is l = 0, That is, the first mapping parameter is determined as Since the frequency domain equivalent reference signal symbol starts from the second subcarrier in the BWP starting RB, the equivalent time domain symbol needs to be multiplied by the first mapping parameter When the OFDM symbol index of the reference signal is l = 1, That is, the first mapping parameter is determined as 1, and the second mapping parameter is determined as -1. Since the frequency domain equivalent reference signal symbol starts from the second subcarrier in the BWP starting RB, the equivalent time domain symbol needs to be multiplied by the first mapping parameter The terminal device multiplies sequence 3 by a first mapping parameter and sequence 4 by a second mapping parameter in the time domain according to a first rule to determine the reference signal can include that the terminal device multiplies sequence 3 by and sequence 4 by to determine the reference signal.

[0238] In yet another possible implementation, the method further includes that the terminal device performs transport block size (TBS), LDPC encoding, modulation, reference signal generation, resource mapping, precoding, and radio frequency, etc. processing according to the configuration information, the first indication information, etc. of the first signal to generate the first signal, and transmits the first signal through an antenna (beamforming). Optionally, the first signal is mainly for DMRS corresponding to PUSCH, and for a coverage scenario, DMRS corresponding to PUCCH can also be generated using a corresponding Golay sequence, and correspondingly, the network device receives the first signal. Optionally, the network device receives the first signal according to the configuration information and the first indication information of the first signal, and then performs decoding, channel estimation, etc.

[0239] In the method described in FIG. 9, when the antenna port number is even, the way of determining the target sequence by performing the first processing on the first sequence based on the reference signal pattern, that is, the process of determining the target sequence by repeating and expanding the first sequence, is equivalent to comb mapping of the frequency domain reference signal symbol, and the way of determining the reference signal by performing the second processing on the target sequence in the time domain according to the first rule is equivalent to determining the starting position of the frequency domain reference signal symbol. Therefore, by the above-mentioned way, that is, the way of processing the first sequence corresponding to the single carrier waveform in the time domain, it is equivalent to the process of resource mapping of the frequency domain reference signal symbol, so as to realize multi-port transmission and improve the time-frequency resource utilization rate.

[0240] Take the case of the reference signal type being Type 1 DMRS and the antenna port number being odd as an example. Please refer to FIG. 17, which is a schematic diagram of another communication method provided by the embodiments of the present application. The method includes but is not limited to the following steps:

[0241] S1701: The network device sends first indication information.

[0242] Exemplarily, the network device sends first indication information to the terminal device, and correspondingly, the terminal device receives the first indication information from the network device, and the terminal device determines the first sequence based on the first indication information. The first indication information includes a sequence type, an antenna port number, or a length of the first sequence. The antenna port number is an odd number. Exemplarily, the reference signal is a single-symbol Type 1 DMRS, and the antenna port number can be port 1 (port1) or port 3 (port3). Exemplarily, the reference signal is a double-symbol Type 1 DMRS, and the antenna port number can be port 1 (port1), port 3 (port3), port 5 (port5), or port 7 (port7). For related explanations of the sequence type and the length of the first sequence, reference can be made to related descriptions in S901.

[0243] In a possible implementation, the method further includes: the network device sends configuration information of the first signal to the terminal device, and the configuration information includes one or more of the following: time domain resources, frequency domain resources, a number of streams, or a waveform. For related descriptions, reference can be made to S901.

[0244] S1702: The terminal device groups the first sequence based on a reference signal pattern to determine a first sub-sequence and a second sub-sequence.

[0245] The first sub-sequence is a first group of sequences, and the second sub-sequence is a second group of sequences. It can be understood that the first sub-sequence is a first group of sequences in the first sequence, and the second sub-sequence is a second group of sequences in the first sequence. The lengths of the first sub-sequence and the second sub-sequence can be the same.

[0246] Exemplarily, the reference signal pattern can be as shown in FIG. 7.

[0247] Exemplarily, before the terminal device groups the first sequence based on the reference signal pattern to determine the first sub-sequence and the second sub-sequence, the terminal device determines the reference signal pattern based on the antenna port number. For example, when the reference signal is a single-symbol Type 1 DMRS and the antenna port number is port1 or port3, the reference signal pattern can be as shown in (a) of FIG. 7. For another example, when the reference signal is a double-symbol Type 1 DMRS and the antenna port number is port1, port3, port5, or port7, the reference signal pattern can be as shown in (b) of FIG. 7. The reference signal pattern includes reference signal frequency domain density information. For example, when the reference signal is a DMRS and the reference signal pattern is as shown in FIG. 7, the reference signal frequency domain density information is 1 / 2.

[0248] The terminal device can determine the first sub-sequence and the second sub-sequence from the first sequence based on the reference signal pattern in the following two ways. In the first way, the first sub-sequence is the first part of the first sequence, and the second sub-sequence is the second part of the first sequence. For example, refer to FIG. 18, which is a schematic diagram of determining the first sub-sequence and the second sub-sequence according to an embodiment of the present application. The length of the first sequence is N, and the first sequence includes s l [0], s l [1],..., s l [N-1], the first sub-sequence includes s l [0], s l [1],..., s l [N / 2-1]; and the second sub-sequence includes s l [N / 2-1], s l [N / 2],..., s l [N-1]. In the second way, the first sub-sequence includes elements with odd index values in the first sequence, and the second sub-sequence includes elements with even index values in the first sequence. For example, the length of the first sequence is N, and the first sequence includes s l [0], s l [1],..., s l [N-1], the first sub-sequence includes s l [0], s l [2],..., s l [N-2]; and the second sub-sequence includes s l [1], s l [3],..., s l [N-1]. Of course, there can be other grouping ways, which are not limited in the embodiments of the present application. The above process can be understood as that the reference signal pattern includes reference signal frequency domain density information, for example, the reference signal frequency domain density information is 1 / 2, and the terminal device divides the first sequence into two groups based on the reference signal frequency domain density information, which are the first sub-sequence and the second sub-sequence.

[0249] S1703: The terminal device determines the second sequence and the third sequence by performing first processing on the first sub-sequence and the second sub-sequence based on the reference signal pattern, respectively.

[0250] The terminal device can determine the second sequence and the third sequence by performing first processing on the first sub-sequence and the second sub-sequence based on the reference signal pattern, respectively, in the following way. The terminal device determines the second sequence by performing first processing on the first sub-sequence based on the reference signal pattern, and determines the third sequence by performing first processing on the second sub-sequence based on the reference signal pattern.

[0251] The terminal device determines the second sequence and the third sequence based on the first processing of the first sub-sequence and the second sub-sequence according to the reference signal pattern, including: determining the second sequence, the second sequence including four first sub-sequences; and determining the third sequence, the third sequence including four second sub-sequences. For example, the terminal device can copy the first sub-sequence to a first position of the first sub-sequence to determine the second sequence, and copy the second sub-sequence to a second position of the second sub-sequence to determine the third sequence, where the first position and the second position are the same. The first position includes the head end of the first sub-sequence and / or the tail end of the first sub-sequence, and the second position includes the head end of the second sub-sequence and / or the tail end of the second sub-sequence. In one example, the first position and the second position being the same can include that the first position is the head end of the first sub-sequence, and the second position is the head end of the second sub-sequence, in which case the first position and the second position are the same. In another example, the first position and the second position being the same can include that the first position is the tail end of the first sub-sequence, and the second position is the tail end of the second sub-sequence, in which case the first position and the second position are the same. In this application, “copying” can also be described as “copying”, “copying” and the like, and the embodiments of this application are not limited. The above process can be understood as repeating and expanding the first sub-sequence to determine the second sequence, and repeating and expanding the second sub-sequence to determine the third sequence, and the principle of repeating and expanding is the same. When the frequency domain density information of the reference signal is 1 / 2 and the length of the first sequence is N, the length of the first sub-sequence and the second sub-sequence is N / 2, and the length of the second sequence and the third sequence is 2N. In one example, please refer to FIG. 19, which is a schematic diagram of determining the second sequence and the third sequence provided by an embodiment of the application, as shown in FIG. 19, the length of the first sequence is N, the first sub-sequence is copied to the tail end of the first sub-sequence to determine the second sequence, the length of the first sub-sequence is N / 2, the length of the second sequence is 2N, the second sub-sequence is copied to the tail end of the second sub-sequence to determine the third sequence, the length of the second sub-sequence is N / 2, and the length of the third sequence is 2N.

[0252] In the above method, the above process can be understood as the process of repeating and expanding the first sub-sequence to determine the second sequence, and repeating and expanding the second sub-sequence to determine the third sequence, which is equivalent to comb mapping of the frequency domain reference signal symbol, further realizing multi-port transmission, and improving the time-frequency resource utilization rate.

[0253] S1704: The terminal device performs second processing on the second sequence and the third sequence in the time domain according to the first rule to determine the reference signal.

[0254] The reference signal is a signal after time domain mapping, the first rule is related to one or more of the following, and the one or more of the following includes: an orthogonal code corresponding to the antenna port number, a reference signal pattern, or grouping information; the antenna port number is odd, and the grouping information is a group in which the first subsequence and / or the second subsequence is located. The grouping information u can be 1 or 2, when the grouping information is 1, it indicates that it is in the first group, and when the grouping information is 2, it indicates that it is in the second group. Optionally, the orthogonal code corresponding to the antenna port number can be an OCC code corresponding to the antenna port number.

[0255] For example, when the reference signal is a single-symbol Type 1 DMRS, the antenna port number is port1, the orthogonal code corresponding to the antenna port number is ('+1, -1'), the antenna port number is port3, the orthogonal code corresponding to the antenna port number is ('+1, -1'); when the reference signal is a double-symbol Type 1 DMRS, the antenna port number is port1, the orthogonal code corresponding to the antenna port number is ('+1-1' '+1-1'), the antenna port number is port3, the orthogonal code corresponding to the antenna port number is ('+1-1' '+1-1'), the antenna port number is port5, the orthogonal code corresponding to the antenna port number is ('+1-1' '-1+1'), and the antenna port number is port7, the orthogonal code corresponding to the antenna port number is ('+1-1' '-1+1').

[0256] The terminal device determines the reference signal by performing a second processing on the second sequence and the third sequence in the time domain according to the first rule, including: multiplying the second sequence by a first mapping parameter and adding the third sequence by a second mapping parameter in the time domain to determine the reference signal, wherein the first mapping parameter and the second mapping parameter are determined based on the first rule. The first rule includes a relationship between the symbol index of the reference signal, the grouping information, the first parameter, and the second parameter. For example, the first rule includes one or more of the following: the relationship between the symbol index of the reference signal, the grouping information, the first parameter, and the second parameter, including:

[0257] Wherein, l=0,1 represents the OFDM symbol index of the reference signal; u=1,2 represents the grouping information, k takes a value of 0~2N-1; N represents the length of the first sequence, Δ represents the first parameter, t represents the second parameter, s l,u (k) represents the time domain sequence index corresponding to the lth OFDM symbol in the u th group, which can be the second sequence and / or the third sequence; y l,u (k) represents the kth reference symbol after time domain mapping, y l (k) represents the kth reference symbol.

[0258] wherein the first parameter and the second parameter are related to the antenna port number. The first parameter and the second parameter being related to the antenna port number comprises one or more of the following: when the antenna port number is port 1, the first parameter is 0 or (2 / 3) and the second parameter is 0; when the antenna port number is port 3, the first parameter is 1 and the second parameter is 0; when the antenna port number is port 5, the first parameter is 0 and the second parameter is 1; when the antenna port number is port 7, the first parameter is 1 and the second parameter is 1. For example, when the antenna port number is port 1, u = 1, the first parameter is 0 and the second parameter is 0; when the antenna port number is port 1, u = 2, the first parameter is (2 / 3) and the second parameter is 0. For example, please refer to Table 3, which shows the relationship between the antenna port number, the CDM group to which the antenna port number belongs, the first parameter and the second parameter. Optionally, the relationship between the antenna port number and the first parameter and the second parameter can be pre-defined by a protocol or indicated by a network device.

[0259] Table 3

[0260] For example, the terminal device determines the reference signal by performing the second processing on the second sequence and the third sequence in the time domain according to the first rule, comprising: multiplying the second sequence by a first mapping parameter and adding the third sequence multiplied by a second mapping parameter to obtain the reference signal in the time domain, wherein the first mapping parameter and the second mapping parameter are determined based on the first rule. The following will illustrate how to determine the first mapping parameter and the second parameter, as follows:

[0261] In an example, please refer to (a) in FIG. 22, when the reference signal is a single-symbol Type 1 DMRS and the antenna port number is port 1. When u = 1, the first parameter Δ is 0 and the second parameter t is 0, and the OFDM symbol index of the reference signal is l = 0, according to formula (2) and formula (3), it is determined that

[0262] l = 0, u = 1, Δ = 0, t = 0,

[0263] Therefore, it is determined that the first mapping parameter is 1.

[0264] When u = 2, the first parameter Δ is 2 / 3 and the second parameter t is 0, and the OFDM symbol index of the reference signal is l = 0, according to formula (2) and formula (3), it is determined that

[0265] l = 0, u = 2, Δ = 2 / 3, t = 0,

[0266] Therefore, it is determined that the second mapping parameter is Therefore, the terminal device performing the second processing on the second sequence and the third sequence in the time domain according to the first rule to determine the reference signal can include: multiplying the second sequence by 1 plus the third sequence by in the time domain to obtain the reference signal.

[0267] In an example, referring to (a) in FIG. 23, when the reference signal is a single-symbol Type 1 DMRS, and the antenna port number is port3. When the OFDM symbol index of the reference signal is l=0, u=1, the first parameter Δ is 1, and the second parameter t is 0, the first mapping parameter is determined according to the formula (2) and the formula (3) as When the OFDM symbol index of the reference signal is l=0, u=2, the first parameter Δ is 1, and the second parameter t is 0, the second mapping parameter is determined according to the formula (2) and the formula (3) as Therefore, the terminal device performing the second processing on the second sequence and the third sequence in the time domain according to the first rule to determine the reference signal can include: multiplying the second sequence by 1 plus the third sequence by in the time domain to obtain the reference signal.

[0268] In the above method, the above processing process is equivalent to determining that the starting position of the frequency domain reference signal symbol is on the first subcarrier in the starting resource block from the partial bandwidth, thereby realizing multi-port transmission and improving the time-frequency resource utilization.

[0269] The above describes the case where the reference signal type is a single-symbol Type 1 DMRS, and the first sequence includes one sequence. The following describes the case where the reference signal type is a double-symbol Type 1 DMRS, and the first sequence includes a sequence pair, which includes two sequences, sequence 1 and sequence 2. Among them, the terminal device groups sequence 1 based on the reference signal pattern to determine the first subsequence and the second subsequence, and groups sequence 2 based on the reference signal pattern to determine the third subsequence and the fourth subsequence; referring to FIG. 20, which is a schematic diagram of grouping a sequence pair provided by an embodiment of the present application, taking the first subsequence as the first part of sequence 1, the second subsequence as the second part of sequence 1, the third subsequence as the first part of sequence 2, and the fourth subsequence as the second part of sequence 2 as an example. Then, the terminal device performs the first processing on the first subsequence and the second subsequence based on the reference signal pattern to determine the second sequence and the third sequence, respectively, and performs the first processing on the third subsequence and the fourth subsequence based on the reference signal pattern to determine the fourth sequence and the fifth sequence, that is, it can also be understood as determining the second sequence, the second sequence including four first subsequences, determining the third sequence, the third sequence including four second subsequences, determining the fourth sequence, the fourth sequence including four third subsequences, and determining the fifth sequence, the fifth sequence including four fourth subsequences.

[0270] ​In an example, please refer to FIG. 21, which is a schematic diagram of determining a second sequence, a third sequence, a fourth sequence and a fifth sequence according to an embodiment of the present application. As shown in FIG. 21, the first sequence is a sequence pair, the sequence pair includes two sequences, which are sequence 1 and sequence 2, the length of sequence 1 and sequence 2 is N, copying a first sub-sequence to the tail end of the first sub-sequence to determine the second sequence, the length of the first sub-sequence is N / 2, the length of the second sequence is 2N, copying a second sub-sequence to the tail end of the second sub-sequence to determine the third sequence, the length of the second sub-sequence is N / 2, the length of the third sequence is 2N, copying a third sub-sequence to the tail end of the third sub-sequence to determine the fourth sequence, the length of the third sub-sequence is N / 2, the length of the fourth sequence is 2N, copying a fourth sub-sequence to the tail end of the fourth sub-sequence to determine the fifth sequence, the length of the fourth sub-sequence is N / 2, and the length of the fifth sequence is 2N.

[0271] In a possible implementation, the terminal device determines the reference signal by performing, according to the first rule, a second processing on the second sequence and the third sequence in the time domain and performing, according to the first rule, a second processing on the fourth sequence and the fifth sequence in the time domain can include: multiplying, in the time domain, the second sequence by a first mapping parameter and adding the third sequence by a second mapping parameter, and multiplying, in the time domain, the fourth sequence by a third mapping parameter and adding the fifth sequence by a fourth mapping parameter to obtain the reference signal, wherein the first mapping parameter, the second mapping parameter, the third mapping parameter and the fourth mapping parameter are determined based on the first rule, and how to determine the first mapping parameter, the second mapping parameter, the third mapping parameter and the fourth mapping parameter will be illustrated below, for example:

[0272] In another example, please refer to (b) in FIG. 22, when the reference signal is a double-symbol Type 1 DMRS, and the antenna port number is port 1. When the OFDM symbol index of the reference signal is l=0, u=1, the first parameter Δ is 0, and the second parameter t is 0,

[0273] l=0, u=1, Δ=0, t=0,

[0274] Therefore, the first mapping parameter is determined to be 1.

[0275] When the OFDM symbol index of the reference signal is l=0, u=2, the first parameter Δ is 2 / 3, and the second parameter t is 0, according to the formula (2) and the formula (3), the first mapping parameter is determined to be

[0276] l=0, u=2, Δ=2 / 3, t=0,

[0277] Therefore, the second mapping parameter is determined to be

[0278] When the OFDM symbol index of the reference signal is l = 1, u = 1, the first parameter is 0, and the second parameter is 0, the first mapping parameter is determined according to formula (2) and formula (3)

[0279] l = 1, u = 1, 0, t = 0,

[0280] Therefore, the third mapping parameter is determined to be 1.

[0281] When the OFDM symbol index of the reference signal is l = 1, u = 2, the first parameter is 2 / 3, and the second parameter is 0, the second mapping parameter is determined according to formula (2) and formula (3)

[0282] l = 1, u = 2, 2 / 3, t = 0,

[0283] Therefore, the fourth mapping parameter is determined to be

[0284] Therefore, the terminal device can determine the reference signal by multiplying the second sequence by the first mapping parameter and adding the third sequence by the second mapping parameter in the time domain, and multiplying the fourth sequence by the third mapping parameter and adding the fifth sequence by the fourth mapping parameter in the time domain. , and multiplying the fourth sequence by 1 and adding the fifth sequence by in the time domain to determine the reference signal.

[0285] In yet another example, please refer to (b) in FIG. 23, when the reference signal is a double-symbol Type 1 DMRS, and the antenna port number is port 3. When the OFDM symbol index of the reference signal is l = 0, u = 1, the first parameter is 1, and the second parameter is 0, the first mapping parameter is determined according to formula (2) and formula (3) When the OFDM symbol index of the reference signal is l = 0, u = 2, the first parameter is 1, and the second parameter is 0, the second mapping parameter is determined according to formula (2) and formula (3) When the OFDM symbol index of the reference signal is l = 1, u = 1, the first parameter is 1, and the second parameter is 0, the third mapping parameter is determined according to formula (2) and formula (3) When the OFDM symbol index of the reference signal is l = 1, u = 2, the first parameter is 1, and the second parameter is 0, the fourth mapping parameter is determined according to formula (2) and formula (3) Therefore, the terminal device can determine the reference signal by multiplying the second sequence by the first mapping parameter and adding the third sequence by the second mapping parameter in the time domain, and multiplying the fourth sequence by the third mapping parameter and adding the fifth sequence by the fourth mapping parameter in the time domain. plus a third sequence multiplied by and a fourth sequence multiplied by plus a fifth sequence multiplied by to determine the reference signal.

[0286] In yet another example, referring to FIG. 24, the reference signal is a two-symbol Type 1 DMRS, and the antenna port number is port 5. When the OFDM symbol index of the reference signal is l = 0, u = 1, the first parameter is 0, and the second parameter is 1, the first mapping parameter is determined to be 1 according to the formula (2) and the formula (3); when the OFDM symbol index of the reference signal is l = 0, u = 2, the first parameter is 2 / 3, and the second parameter is 1, the second mapping parameter is determined to be When the OFDM symbol index of the reference signal is l = 1, u = 1, the first parameter is 0, and the second parameter is 1, the third mapping parameter is determined to be -1 according to the formula (2) and the formula (3); when the OFDM symbol index of the reference signal is l = 1, u = 2, the first parameter is 2 / 3, and the second parameter is 1, the fourth mapping parameter is determined to be Therefore, the terminal device multiplies, in the time domain, the second sequence by the first mapping parameter plus the third sequence by the second mapping parameter, and multiplies, in the time domain, the fourth sequence by the third mapping parameter plus the fifth sequence by the fourth mapping parameter to determine the reference signal, can include: multiplying, in the time domain, the second sequence by 1 plus the third sequence by and multiplying, in the time domain, the fourth sequence by plus the fifth sequence multiplied by to determine the reference signal.

[0287] In yet another example, referring to FIG. 25, the reference signal is a two-symbol Type 1 DMRS, and the antenna port number is port 7. When the OFDM symbol index of the reference signal is l = 0, u = 1, the first parameter is 1, and the second parameter is 1, the first mapping parameter is determined to be When the OFDM symbol index of the reference signal is l = 0, u = 2, the first parameter is 1, and the second parameter is 1, the second mapping parameter is determined to be When the OFDM symbol index of the reference signal is l = 1, u = 1, the first parameter is 1, and the second parameter is 1, the third mapping parameter is determined to be When the OFDM symbol index of the reference signal is l = 1, u = 2, the first parameter is 1, and the second parameter is 1, the fourth mapping parameter is determined to be Therefore, the terminal device multiplying the second sequence by the first mapping parameter and adding the third sequence multiplied by the second mapping parameter in the time domain, and multiplying the fourth sequence by the third mapping parameter and adding the fifth sequence multiplied by the fourth mapping parameter in the time domain to determine the reference signal can include multiplying the second sequence by the first mapping parameter and adding the third sequence multiplied by the second mapping parameter in the time domain, and multiplying the fourth sequence by the third mapping parameter and adding the fifth sequence multiplied by the fourth mapping parameter in the time domain to determine the reference signal. Adding the third sequence multiplied by And multiplying the fourth sequence by Adding the fifth sequence multiplied by To determine the reference signal.

[0288] In the method described in FIG. 17, when the antenna port number is odd, the first sequence is grouped based on the reference signal pattern to determine the first sub-sequence and the second sub-sequence, which can be understood as that the reference signal pattern includes reference signal frequency domain density information, the reference signal frequency domain density information is 1 / 2, the first sequence is divided into 2 groups based on the reference signal frequency domain density information, which are the first sub-sequence and the second sub-sequence respectively. The first sequence and the second sequence are respectively processed based on the reference signal pattern to determine the second sequence and the third sequence, that is, the process of repeating and expanding the first sub-sequence to determine the second sequence, and repeating and expanding the second sub-sequence to determine the third sequence, which is equivalent to comb-shaped mapping of the frequency domain reference signal symbol. According to the first rule, the second sequence and the third sequence are processed in the time domain to determine the reference signal, which is equivalent to determining the starting position of the frequency domain reference signal symbol. Therefore, by the above method, that is, the way of processing the first sequence corresponding to the single carrier waveform in the time domain, which is equivalent to the process of resource mapping of the frequency domain reference signal symbol, thereby realizing multi-port transmission and improving the time-frequency resource utilization rate.

[0289] The above describes that when the reference signal type is Type 1 DMRS and the antenna port number is odd or even, how to process in the time domain under the condition that the coverage scene requirement is relatively high, thereby realizing multi-port transmission and improving the time-frequency resource utilization rate. The following will describe the process of how to process in the time domain when the reference signal type is Type 2 DMRS and the antenna port number is odd or even under the condition that the coverage scene requirement is not high, thereby realizing multi-port transmission and improving the time-frequency resource utilization rate.

[0290] Please refer to FIG. 26, which is a schematic diagram of another communication method provided by an embodiment of the present application, which includes but is not limited to the following steps:

[0291] S2601: The network device sends first indication information.

[0292] Exemplarily, the network device sends first indication information to the terminal device, and correspondingly, the terminal device receives the first indication information from the network device, and the terminal device determines a first sequence based on the first indication information. The first indication information includes a sequence type, an antenna port number, or a length of the first sequence. Exemplarily, the reference signal type is Type 2 DMRS, and the antenna port number can be an odd number or an even number, for example, the reference signal type is single-symbol Type 2 DMRS, and the antenna port number can be port 0 (port0), port 1 (port1), port 2 (port2), port 3 (port03), port 4 (port4), or port 5 (port5); for example, the reference signal type is double-symbol Type 2 DMRS, and the antenna port number can be port 0 (port0), port 1 (port1), port 2 (port2), port 3 (port03), port 4 (port4), port 5 (port5), port 6 (port6), port 7 (port7), port 8 (port8), port 9 (port9), port 10 (port10), or port 11 (port11). The length of the first sequence can be 2N / 3. The explanation of the sequence type and the length of the first sequence can be specifically referred to the related description in S901.

[0293] S2602: The terminal device determines a first sub-sequence and a second sub-sequence based on grouping the first sequence according to a reference signal pattern.

[0294] Exemplarily, the reference signal pattern can be as shown in FIG. 8.

[0295] Exemplarily, the length of the first sequence is 2N / 3, and the length of the first sub-sequence and the second sub-sequence is N / 3. The terminal device can determine the first sub-sequence and the second sub-sequence based on grouping the first sequence according to a reference signal pattern in two ways: in the first way, the first sub-sequence is a front part of the first sequence, and the second sub-sequence is a rear part of the first sequence; in the second way, the first sub-sequence includes elements with odd index values in the first sequence, and the second sub-sequence includes elements with even index values in the first sequence. The specific description can be referred to the related description in S1702.

[0296] S2603: The terminal device determines a second sequence and a third sequence based on respectively performing a first processing on the first sub-sequence and the second sub-sequence according to a reference signal pattern.

[0297] The terminal device determines the second sequence and the third sequence based on the reference signal pattern on the first sub-sequence and the second sub-sequence respectively, including: determining the second sequence, the second sequence including 6 first sub-sequences; determining the third sequence, the third sequence including 6 second sub-sequences. For example, the terminal device can copy the first sub-sequence to the first position of the first sub-sequence to determine the second sequence, and copy the second sub-sequence to the second position of the second sub-sequence to determine the third sequence, where the first position and the second position are the same. The first position includes the head of the first sub-sequence and / or the tail of the first sub-sequence, and the second position includes the head of the second sub-sequence and / or the tail of the second sub-sequence. For details, refer to the related description in S1703. In an example, refer to FIG. 27, which is a schematic diagram of determining the second sequence and the third sequence according to an embodiment of the present application. As shown in FIG. 27, the length of the first sequence is 2N / 3, the first sub-sequence is copied to the tail of the first sub-sequence to determine the second sequence, the length of the first sub-sequence is N / 3, and the length of the second sequence is 2N. The second sub-sequence is copied to the tail of the second sub-sequence to determine the third sequence, the length of the second sub-sequence is N / 3, and the length of the third sequence is 2N.

[0298] S2604: The terminal device performs a second processing on the second sequence and the third sequence in the time domain according to a first rule to determine a reference signal.

[0299] The reference signal is a signal after time domain mapping, and the first rule is related to one or more of the following: an orthogonal code corresponding to an antenna port number, the reference signal pattern, or grouping information. The grouping information is a grouping in which the first sub-sequence and / or the second sub-sequence is located. For details, refer to the related description in S1704.

[0300] For example, when the reference signal is a single-symbol Type 2 DMRS, the antenna port number is port0, the orthogonal code corresponding to the antenna port number is (‘+1, +1’), the antenna port number is port1, the orthogonal code corresponding to the antenna port number is (‘+1, -1’); the antenna port number is port2, the orthogonal code corresponding to the antenna port number is (‘+1, +1’), the antenna port number is port3, the orthogonal code corresponding to the antenna port number is (‘+1, -1’), the antenna port number is port4, the orthogonal code corresponding to the antenna port number is (‘+1, +1’), and the antenna port number is port5, the orthogonal code corresponding to the antenna port number is (‘+1, -1’). In the present application, ‘’ in the orthogonal code represents the same symbol, unless otherwise specified.

[0301] For example, when the reference signal is a double-symbol Type 2 DMRS, the orthogonal code corresponding to the antenna port number is (‘+1+1’ ‘+1+1’) when the antenna port number is port0, the orthogonal code corresponding to the antenna port number is (‘+1-1’ ‘+1-1’) when the antenna port number is port1, the orthogonal code corresponding to the antenna port number is (‘+1+1’ ‘+1+1’) when the antenna port number is port2, the orthogonal code corresponding to the antenna port number is (‘+1-1’ ‘+1-1’) when the antenna port number is port3, the orthogonal code corresponding to the antenna port number is (‘+1+1’ ‘+1+1’) when the antenna port number is port4, the orthogonal code corresponding to the antenna port number is (‘+1-1’ ‘+1-1’) when the antenna port number is port5, the orthogonal code corresponding to the antenna port number is (‘+1+1’ ‘-1-1’) when the antenna port number is port6, the orthogonal code corresponding to the antenna port number is (‘+1-1’ ‘-1+1’) when the antenna port number is port7, the orthogonal code corresponding to the antenna port number is (‘+1+1’ ‘-1-1’) when the antenna port number is port8, the orthogonal code corresponding to the antenna port number is (‘+1-1’ ‘-1+1’) when the antenna port number is port9, the orthogonal code corresponding to the antenna port number is (‘+1+1’ ‘-1-1’) when the antenna port number is port10, and the orthogonal code corresponding to the antenna port number is (‘+1-1’ ‘-1+1’) when the antenna port number is port11.

[0302] The terminal device determines the reference signal by performing the second processing on the second sequence and the third sequence in the time domain according to the first rule, including multiplying the second sequence by a first mapping parameter and adding the third sequence by a second mapping parameter in the time domain to determine the reference signal, wherein the first mapping parameter and the second mapping parameter are determined based on the first rule. The first rule includes one or more of the following: the symbol index of the reference signal, the grouping information, the first parameter, and the relationship satisfied between the second parameter. For details, please refer to the related description in S1704. This will not be described here.

[0303] The terminal device determines the reference signal by performing the second processing on the second sequence and the third sequence in the time domain according to the first rule, including multiplying the second sequence by a first mapping parameter and adding the third sequence by a second mapping parameter in the time domain to determine the reference signal, wherein the first mapping parameter and the second mapping parameter are determined based on the first rule. The following will illustrate how to determine the first mapping parameter and the second parameter, as follows:

[0304] In one example, please refer to (a) in FIG. 29, when the reference signal is a single-symbol Type 2 DMRS, according to the first rule, the first mapping parameter is +1 and the second mapping parameter is Therefore, the terminal device determining the reference signal by performing the second processing on the second sequence and the third sequence in the time domain according to the first rule can include: multiplying the second sequence by 1 plus multiplying the third sequence by in the time domain to determine the reference signal.

[0305] In another example, referring to (a) in FIG. 30, when the reference signal is a single-symbol Type 2 DMRS, the antenna port number is port 1, and according to the first rule, the first mapping parameter is determined to be +1 and the second mapping parameter is determined to be Therefore, the terminal device determining the reference signal by performing the second processing on the second sequence and the third sequence in the time domain according to the first rule can include: multiplying the second sequence by 1 plus multiplying the third sequence by in the time domain to determine the reference signal.

[0306] In another example, referring to (a) in FIG. 31, when the reference signal is a single-symbol Type 2 DMRS, the antenna port number is port 2, and according to the first rule, the first mapping parameter is determined to be the second mapping parameter is determined to be Therefore, the terminal device determining the reference signal by performing the second processing on the second sequence and the third sequence in the time domain according to the first rule can include: multiplying the second sequence by 1 plus multiplying the third sequence by in the time domain to determine the reference signal. Therefore, the terminal device determining the reference signal by performing the second processing on the second sequence and the third sequence in the time domain according to the first rule can include: multiplying the second sequence by 1 plus multiplying the third sequence by

[0307] In another example, referring to (a) in FIG. 32, when the reference signal is a single-symbol Type 2 DMRS, the antenna port number is port 3, and according to the first rule, the first mapping parameter is determined to be the second mapping parameter is determined to be Therefore, the terminal device determining the reference signal by performing the second processing on the second sequence and the third sequence in the time domain according to the first rule can include: multiplying the second sequence by 1 plus multiplying the third sequence by in the time domain to determine the reference signal. Therefore, the terminal device determining the reference signal by performing the second processing on the second sequence and the third sequence in the time domain according to the first rule can include: multiplying the second sequence by 1 plus multiplying the third sequence by

[0308] The process of determining the first mapping parameter and the second mapping parameter when the reference signal is a single-symbol Type 2 DMRS and the antenna port number is port 4 and port 5 can refer to the above description, and will not be described here.

[0309] The above describes the case where the reference signal type is a single-symbol Type 2 DMRS and the first sequence includes one sequence. Next, the case where the reference signal type is a double-symbol Type 2 DMRS and the first sequence includes a sequence pair including two sequences, sequence 1 and sequence 2, will be described as follows:

[0310] The terminal device determines a first sub-sequence and a second sub-sequence by grouping the first sequence based on the reference signal pattern, and determines a third sub-sequence and a fourth sub-sequence by grouping the second sequence based on the reference signal pattern; the terminal device respectively determines a second sequence and a third sequence by performing first processing on the first sub-sequence and the second sub-sequence based on the reference signal pattern, and respectively determines a fourth sequence and a fifth sequence by performing first processing on the third sub-sequence and the fourth sub-sequence based on the reference signal pattern, that is, it can be understood that the second sequence is determined, the second sequence includes 6 first sub-sequences, the third sequence is determined, the third sequence includes 6 second sub-sequences, the fourth sequence is determined, the fourth sequence includes 6 third sub-sequences, and the fifth sequence is determined, the fifth sequence includes 6 fourth sub-sequences. For details, please refer to the related description in S1703.

[0311] In an example, please refer to FIG. 28, which is another schematic diagram for determining the second sequence, the third sequence, the fourth sequence, and the fifth sequence provided by the embodiment of the present application. As shown in FIG. 28, the first sequence is a sequence pair, the sequence pair includes two sequences, which are the first sequence and the second sequence respectively, the length of the first sequence and the second sequence is 2N / 3, the terminal device determines a first sub-sequence and a second sub-sequence by grouping the first sequence based on the reference signal pattern, and determines a third sub-sequence and a fourth sub-sequence by grouping the second sequence based on the reference signal pattern, the second sequence is determined by copying the first sub-sequence to the tail end of the first sub-sequence, the length of the first sub-sequence is N / 3, and the length of the second sequence is 2N, the third sequence is determined by copying the second sub-sequence to the tail end of the second sub-sequence, the length of the second sub-sequence is N / 3, and the length of the third sequence is 2N, the fourth sequence is determined by copying the third sub-sequence to the tail end of the third sub-sequence, the length of the third sub-sequence is N / 3, and the length of the fourth sequence is 2N, and the fifth sequence is determined by copying the fourth sub-sequence to the tail end of the fourth sub-sequence, the length of the fourth sub-sequence is N / 3, and the length of the fifth sequence is 2N.

[0312] In a possible implementation, the terminal device performs second processing on the second sequence and the third sequence in the time domain according to the first rule, and performs second processing on the fourth sequence and the fifth sequence in the time domain according to the first rule to determine the reference signal, which can include: multiplying the second sequence by a first mapping parameter and adding the third sequence by a second mapping parameter in the time domain, and multiplying the fourth sequence by a third mapping parameter and adding the fifth sequence by a fourth mapping parameter in the time domain to determine the reference signal, wherein the first mapping parameter, the second mapping parameter, the third mapping parameter, and the fourth mapping parameter are determined based on the first rule, and examples of how to determine the first mapping parameter, the second mapping parameter, the third mapping parameter, and the fourth mapping parameter will be illustrated below, as follows:

[0313] In one example, referring to (b) in FIG. 29, when the reference signal is a double-symbol Type 2 DMRS, and the antenna port number is port0, according to the first rule, the first mapping parameter is determined to be +1, and the second mapping parameter is determined to be the third mapping parameter is +1, and the fourth mapping parameter is Therefore, the terminal device determines the reference signal by multiplying the second sequence by the first mapping parameter and adding the third sequence by the second mapping parameter in the time domain, and multiplying the fourth sequence by the third mapping parameter and adding the fifth sequence by the fourth mapping parameter in the time domain, can include: multiplying the second sequence by 1 and adding the third sequence by and multiplying the fourth sequence by 1 and adding the fifth sequence by in the time domain to determine the reference signal.

[0314] In another example, referring to (b) in FIG. 30, when the reference signal is a double-symbol Type 2 DMRS, and the antenna port number is port1, according to the first rule, the first mapping parameter is determined to be +1, and the second mapping parameter is determined to be the third mapping parameter is +1, and the fourth mapping parameter is Therefore, the terminal device determines the reference signal by multiplying the second sequence by the first mapping parameter and adding the third sequence by the second mapping parameter in the time domain, and multiplying the fourth sequence by the third mapping parameter and adding the fifth sequence by the fourth mapping parameter in the time domain, can include: multiplying the second sequence by 1 and adding the third sequence by and multiplying the fourth sequence by 1 and adding the fifth sequence by in the time domain to determine the reference signal.

[0315] In another example, referring to (b) in FIG. 31, when the reference signal is a double-symbol Type 2 DMRS, and the antenna port number is port2, according to the first rule, the first mapping parameter is determined to be the second mapping parameter is the third mapping parameter is the fourth mapping parameter is Therefore, the terminal device determines the reference signal by multiplying the second sequence by the first mapping parameter and adding the third sequence by the second mapping parameter in the time domain, and multiplying the fourth sequence by the third mapping parameter and adding the fifth sequence by the fourth mapping parameter in the time domain, can include: multiplying the second sequence by adding the third sequence by and multiplying the fourth sequence by adding the fifth sequence by in the time domain to determine the reference signal.

[0316] In yet another example, referring to (b) in FIG. 32, when the reference signal is double-symbol Type 2 DMRS, the antenna port number is port 3, according to the first rule, the first mapping parameter is determined to be The second mapping parameter is The third mapping parameter is The fourth mapping parameter is Therefore, the terminal device determines the reference signal by multiplying the second sequence by the first mapping parameter and the third sequence by the second mapping parameter in the time domain, and multiplying the fourth sequence by the third mapping parameter and the fifth sequence by the fourth mapping parameter in the time domain, which can include: multiplying the second sequence by the third sequence by and multiplying the fourth sequence by the fifth sequence by in the time domain to determine the reference signal.

[0317] The process of determining the first mapping parameter, the second mapping parameter, the third mapping parameter and the fourth mapping parameter when the reference signal is double-symbol Type 2 DMRS and the antenna port number is port 4, port 5, port 6, port 7, port 8, port 9, port 10 or port 11 can refer to the above description, which will not be repeated here.

[0318] In the method described in FIG. 26, when the reference signal type is Type 2 DMRS and the antenna port number is odd or even, the above processing method, i.e., the method of processing the first sequence corresponding to the single carrier waveform in the time domain, is used to realize multi-port transmission and improve the time-frequency resource utilization rate when the coverage scene requirement is not high.

[0319] The above describes the method of the embodiments of the application in detail, and the apparatus of the embodiments of the application is provided below.

[0320] Referring to FIG. 33, FIG. 33 is a structural schematic diagram of a communication apparatus 3300 provided by the embodiments of the application. The communication apparatus 3300 can include a module or unit or means corresponding to each of the methods / operations / steps / actions performed by the terminal device or the network device in the above method embodiments. The module or unit or means can be a hardware circuit, software or a combination of hardware circuit and software.

[0321] In a possible implementation, the communication apparatus 3300 can include a processing unit 3301 and a transceiver unit 3302, and each unit is specifically as follows:

[0322] The processing unit 3301 is configured to perform data processing. The transceiver unit 3302 can implement corresponding communication functions. The transceiver unit 3302 can also be referred to as a communication interface or a communication module.

[0323] Optionally, the communication apparatus 3300 can further include a storage unit, which can be configured to store instructions and / or data. The processing unit 3301 can read the instructions and / or data in the storage unit, so as to implement the foregoing method embodiments.

[0324] Optionally, the transceiver unit 3302 can include a sending unit and a receiving unit. The sending unit is configured to perform the sending operations in the foregoing method embodiments. The receiving unit is configured to perform the receiving operations in the foregoing method embodiments.

[0325] It should be noted that the communication apparatus 3300 can include the sending unit and not include the receiving unit. Alternatively, the communication apparatus 3300 can include the receiving unit and not include the sending unit. Whether the sending unit and the receiving unit are included in the communication apparatus 3300 can depend on whether the sending action and the receiving action are included in the foregoing schemes implemented by the communication apparatus 3300.

[0326] Optionally, the communication apparatus 3300 is configured to perform the actions performed by the terminal device in the embodiments shown in FIG. 9. For details, refer to the related description in the embodiments shown in FIG. 9, which will not be repeated here. For example, the communication apparatus 3300 is configured to implement the following scheme: the processing unit 3301 is configured to perform first processing on a first sequence based on a reference signal pattern to determine a target sequence; and the processing unit 3301 is further configured to perform second processing on the target sequence in the time domain according to a first rule to determine a reference signal, where the reference signal is a signal after time domain mapping, the first rule is related to an orthogonal code corresponding to an antenna port number and / or the reference signal pattern, and the antenna port number is even.

[0327] It should be noted that the implementation and advantages of each module can also be referred to the corresponding description of the method embodiments shown in FIG. 9.

[0328] Optionally, the communication apparatus 3300 is configured to perform the actions of the network device in the above-described embodiment of Figure 9. Details can be referred to the related description in the above-described embodiment of Figure 9, which will not be repeated here. For example, the communication apparatus 3300 is configured to perform the following scheme: the transceiver 3302 is configured to send first indication information, the first indication information comprising one or more of: a sequence type, an antenna port number, or a length of a first sequence; and the transceiver 3302 is further configured to receive a first signal based on the first indication information, the first signal comprising a reference signal, the reference signal being determined by performing a second processing on a target sequence in a time domain according to a first rule, the target sequence being determined by performing a first processing on the first sequence based on a reference signal pattern, the reference signal being a signal after time domain mapping, and the first rule being related to one or more of: an orthogonal cover code corresponding to the antenna port number, and / or the reference signal pattern, the antenna port number being even.

[0329] It should be noted that the implementation and benefits of each module can also be referred to the corresponding description of the method embodiment of Figure 9.

[0330] Optionally, the communication apparatus 3300 is configured to perform the actions of the terminal device in the above-described embodiment of Figure 17. Details can be referred to the related description in the above-described embodiment of Figure 17, which will not be repeated here. For example, the communication apparatus 3300 is configured to perform the following scheme: the processing unit 3301 is configured to determine a first sub-sequence and a second sub-sequence based on a reference signal pattern by grouping a first sequence, the first sub-sequence being a first group of sequences, and the second sub-sequence being a second group of sequences; the processing unit 3301 is further configured to determine a second sequence and a third sequence based on the reference signal pattern by performing a first processing on the first sub-sequence and the second sub-sequence, respectively; and the processing unit 3301 is further configured to determine a reference signal by performing a second processing on the second sequence and the third sequence in a time domain according to a first rule, wherein the reference signal is a signal after time domain mapping, and the first rule is related to one or more of: an orthogonal cover code corresponding to an antenna port number, the reference signal pattern, or grouping information, the antenna port number being odd, and the grouping information being a group in which the first sub-sequence and / or the second sub-sequence is located.

[0331] It should be noted that the implementation and benefits of each module can also be referred to the corresponding description of the method embodiment of Figure 17.

[0332] Optionally, the communication apparatus 3300 is configured to perform the actions of the network device in the above-described embodiment shown in FIG. 17. For details, refer to the related description in the above-described embodiment shown in FIG. 17, which is not described here in detail. For example, the communication apparatus 3300 is configured to perform the following scheme: the transceiver 3302 is configured to send first indication information, the first indication information including one or more of the following: sequence type, antenna port number, or length of the first sequence; the transceiver 3302 is further configured to receive a first signal based on the first indication information, the first signal including a reference signal, the reference signal being determined by performing second processing on a second sequence and a third sequence in a time domain according to a first rule, the second sequence and the third sequence being determined by performing first processing on a first sub-sequence and a second sub-sequence based on a reference signal pattern, the first sub-sequence and the second sub-sequence being determined by grouping the first sequence based on the reference signal pattern, wherein the first sub-sequence is a first group of sequences, and the second sub-sequence is a second group of sequences; the first rule is related to one or more of the following: orthogonal code corresponding to the antenna port number, the reference signal pattern, or grouping information; the antenna port number is odd, the grouping information is a group in which the first sub-sequence and / or the second sub-sequence is located, and the reference signal is a signal after time domain mapping.

[0333] It should be noted that the implementation and benefits of each module can also be referred to the corresponding description of the method embodiment shown in FIG. 17.

[0334] The division of the modules in the embodiments of the present application is illustrative, and is only a logical function division. In actual implementation, another division manner can be used.

[0335] The processing unit 3301 in the above embodiment can be implemented by at least one processor or processor-related circuit. The transceiver 3302 can be implemented by a transceiver or transceiver-related circuit. The transceiver 3302 can also be referred to as a communication module or a communication interface. The storage module can be implemented by at least one memory.

[0336] Please refer to FIG. 34, which is a structural schematic diagram of another communication apparatus 3400 provided by the embodiments of the present application. The communication apparatus 3400 can include modules or units or means corresponding to the methods / operations / steps / actions performed by the terminal device or the network device in the above-described method embodiments. The modules or units or means can be hardware circuits, software, or a combination of hardware circuits and software.

[0337] The communication device 3400 comprises at least one processor 3401. Optionally, the communication device 3400 further comprises a communication interface 3403, and optionally, the communication device 3400 further comprises a memory 3402, and the processor 3401, the memory 3402 and the communication interface 3403 are connected with each other through a bus 3404. Optionally, the processor 3401 can be integrated with the memory 3402.

[0338] The memory 3402 comprises, but is not limited to, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read only memory (EPROM), or a compact disc read-only memory (CD-ROM). The memory 3402 is used to store relevant computer programs and data. The communication interface 3403 is used to receive and send data.

[0339] The processor 3401 can be one or more central processing units (CPUs). In the case where the processor 3401 is a CPU, the CPU can be a single-core CPU or a multi-core CPU.

[0340] The processor 3401 in the communication device 3400 is configured to read the computer programs or instructions stored in the memory 3402 to realize the functions of the processing units described above. The communication interface 3403 in the communication device 3400 is configured to realize the functions of the transceiver units described above.

[0341] The embodiments of the present application further provide a chip device, which comprises at least one processor configured to invoke computer programs or instructions stored in a memory, so that the processor executes the method provided in the above embodiments.

[0342] In a possible implementation, the input of the chip device corresponds to the receiving operation in any of the above embodiments, and the output of the chip device corresponds to the sending operation in any of the above embodiments.

[0343] Optionally, the processor is coupled with the memory through an interface.

[0344] Optionally, the chip device further comprises a memory, and the memory stores computer program instructions.

[0345] The embodiment of the present application further provides a computer readable storage medium, wherein a computer program or instructions are stored in the computer readable storage medium, and when the computer program or instructions are run on a computer, the method executed by the terminal device or the network device in the above method embodiment is implemented.

[0346] The embodiment of the present application further provides a computer program product, which comprises computer programs or instructions, and when the computer programs or instructions are run on a computer, the method executed by the terminal device or the network device in the above method embodiment is implemented.

[0347] The embodiment of the present application further provides a communication system, which comprises the terminal device in the above embodiment and the network device in the above embodiment. The terminal device is configured to perform part or all of the operations performed by the terminal device in the above method embodiment, and the network device is configured to perform part or all of the operations performed by the network device in the above method embodiment.

[0348] It can be understood that the processor in the embodiment of the present application can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The general-purpose processor can be a microprocessor or any conventional processor.

[0349] The method steps in the embodiment of the present application can be realized by a hardware mode or a mode of executing software instructions by a processor. The software instructions can be composed of corresponding software modules, and the software modules can be stored in a random access memory, a flash memory, a read only memory, a programmable read only memory, an erasable programmable read only memory, an electrically erasable programmable read only memory, a register, a hard disk, a mobile hard disk, a CD-ROM or any other form of storage medium well known in the art. An exemplary storage medium is coupled to the processor, so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and the storage medium can be located in an ASIC. In addition, the ASIC can be located in a base station or a terminal. Of course, the processor and the storage medium can also exist as discrete components in the base station or the terminal.

[0350] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer programs or instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are performed. The computer can be a general purpose computer, a special purpose computer, a computer network, a network device, a user equipment or other programmable apparatus. The computer programs or instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer programs or instructions can be transferred from one website site, computer, server or data center to another website site, computer, server or data center through wired or wireless manner. The computer readable storage medium can be any available medium accessible by a computer or a data storage device such as a server, data center and the like integrated with one or more available media. The available media can be a magnetic medium, such as a floppy disk, a hard disk, a magnetic tape; an optical medium, such as a digital video disc; and a semiconductor medium, such as a solid state disk. The computer readable storage medium can be a volatile or non-volatile storage medium, or can include both volatile and non-volatile storage media.

[0351] In various embodiments of the present application, the terms and / or descriptions of different embodiments are consistent and can be referred to each other if there is no special description and logical conflict, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0352] In the description of the present application, the words "first", "second", "S901" or "S902" and the like are only used for the purpose of distinguishing description and facilitating context writing, and the different order numbers themselves do not have specific technical meanings, cannot be understood as indicating or implying relative importance, and cannot be understood as indicating or implying the execution order of operation, and the execution order of each process should be determined according to its function and inherent logic.

Claims

1. A communication method characterized by comprising: The method comprises: performing first processing on a first sequence based on a reference signal pattern to determine a target sequence; performing second processing on the target sequence in a time domain according to a first rule to determine a reference signal, wherein the reference signal is a signal after time domain mapping, the first rule is related to an orthogonal code corresponding to an antenna port number and / or the reference signal pattern, and the antenna port number is even.

2. The method of claim 1, wherein, The method further comprises: receiving first indication information, wherein the first indication information comprises one or more of a sequence type, the antenna port number, or a length of the first sequence; determining the first sequence based on the first indication information.

3. The method according to claim 1 or 2, characterized in that, The method further comprises: determining the reference signal pattern based on the antenna port number, wherein the reference signal pattern comprises reference signal frequency domain density information.

4. The method of claim 3, wherein, When the reference signal frequency domain density information is 1 / 2 and the length of the first sequence is N, the length of the target sequence is 2N, wherein N is a positive integer greater than 1.

5. The method according to any one of claims 1 to 4, characterized in that, The performing first processing on the first sequence based on the reference signal pattern to determine the target sequence comprises determining the target sequence, wherein the target sequence comprises two first sequences.

6. The method according to any one of claims 1 to 5, characterized in that, The performing second processing on the target sequence in the time domain according to the first rule to determine the reference signal comprises multiplying the target sequence by a mapping parameter in the time domain to determine the reference signal, wherein the mapping parameter is determined based on the first rule.

7. The method of claim 6, wherein, The first rule comprises a relationship between a symbol index of the reference signal, a first parameter, and a second parameter, wherein the first parameter and the second parameter are related to the antenna port number.

8. The method of claim 7, wherein, wherein, l=0, 1 represents a time domain orthogonal frequency division multiplexing, OFDM, symbol index of a reference signal; k is valued from 0 to 2N-1; N represents a length of a first sequence, Δ represents a first parameter, t represents a second parameter, and s l () represents a time domain sequence index corresponding to the lth OFDM symbol; y l (k) represents the kth reference symbol after time domain mapping.

9. The method according to claim 7 or 8, characterized in that, The first parameter and the second parameter being related to the antenna port number comprises one or more of: when the antenna port number is port 0, the first parameter is 0 and the second parameter is 0; when the antenna port number is port 2, the first parameter is 1 and the second parameter is 0; when the antenna port number is port 4, the first parameter is 0 and the second parameter is 1; or when the antenna port number is port 6, the first parameter is 1 and the second parameter is 1. When the sequence type comprises a Golay sequence, the antenna port number is port 0 or port 2.

10. The method according to any one of claims 2-9, characterized in that, The method comprises:

11. A communication method characterized by comprising: sending first indication information, wherein the first indication information comprises one or more of a sequence type, an antenna port number, or a length of a first sequence; receiving a first signal based on the first indication information, wherein the first signal comprises a reference signal, the reference signal is determined by performing second processing on a target sequence in a time domain according to a first rule, the target sequence is determined by performing first processing on the first sequence based on a reference signal pattern, the reference signal is a signal after time domain mapping, the first rule is related to an orthogonal code corresponding to the antenna port number and / or the reference signal pattern, and the antenna port number is even. The reference signal pattern comprises reference signal frequency domain density information.

12. The method of claim 11, wherein, When the reference signal frequency domain density information is 1 / 2 and the length of the first sequence is N, the length of the target sequence is 2N, wherein N is a positive integer greater than 1.

13. The method of claim 12, wherein, The target sequence comprises two first sequences.

14. The method according to any one of claims 11-13, characterized in that, ​ 15. The method according to any one of claims 11-14, characterized in that, The reference signal is determined by multiplying the target sequence by a mapping parameter in the time domain, and the mapping parameter is determined based on the first rule.

16. The method of claim 15, wherein, The first rule includes a relationship between a symbol index of a reference signal, a first parameter, and a second parameter, and the first parameter and the second parameter are related to the antenna port number.

17. The method of claim 16, wherein, wherein, l=0, 1 represents a time domain orthogonal frequency division multiplexing, OFDM, symbol index of a reference signal; k is valued from 0 to 2N-1; N represents a length of a first sequence, Δ represents a first parameter, t represents a second parameter, and s l () represents a time domain sequence index corresponding to the lth OFDM symbol; y l (k) represents the kth reference symbol after time domain mapping.

18. The method according to claim 16 or 17, characterized in that The first parameter and the second parameter are related to the antenna port number, including one or more of the following: When the antenna port number is port 0, the first parameter is 0, and the second parameter is 0; When the antenna port number is port 2, the first parameter is 1, and the second parameter is 0; When the antenna port number is port 4, the first parameter is 0, and the second parameter is 1; Or When the antenna port number is port 6, the first parameter is 1, and the second parameter is 1.

19. The method according to any one of claims 11-18, characterized in that, When the sequence type includes a Golay sequence, the antenna port number is port 0 or port 2.

20. A method of communication, comprising: It includes: Grouping the first sequence based on a reference signal pattern to determine a first subsequence and a second subsequence, the first subsequence being a first group of sequences, and the second subsequence being a second group of sequences; Based on the reference signal pattern, the first subsequence and the second subsequence are respectively processed to determine a second sequence and a third sequence; According to a first rule, the second sequence and the third sequence are processed in the time domain to determine a reference signal, wherein the reference signal is a signal after time domain mapping, and the first rule is related to one or more of the following, including: an orthogonal code corresponding to an antenna port number, a reference signal pattern, or grouping information; the antenna port number is odd, and the grouping information is the grouping in which the first subsequence and / or the second subsequence is located.

21. The method of claim 20, wherein, It also includes: Receiving first indication information, the first indication information including one or more of the following: sequence type, antenna port number, or length of the first sequence; Determine the first sequence based on the first indication information.

22. The method of claim 20 or 21, wherein, It also includes: Determine the reference signal pattern based on the antenna port number, the reference signal pattern including reference signal frequency domain density information.

23. The method of claim 22, wherein, When the reference signal frequency domain density information is 1 / 2, and the length of the first sequence is N, the length of the first subsequence and the second subsequence is N / 2, and the length of the second sequence and the third sequence is 2N, where N is a positive integer greater than 1.

24. The method of any one of claims 20-23, wherein, The first processing of the first subsequence and the second subsequence based on the reference signal pattern to determine a second sequence and a third sequence, including: Determine the second sequence, which includes four first subsequences; Determine the third sequence, which includes four second subsequences.

25. The method of any one of claims 20-24, wherein, The second processing of the second sequence and the third sequence in the time domain to determine a reference signal according to a first rule, including: The reference signal is determined by multiplying the second sequence by a first mapping parameter and adding the third sequence by a second mapping parameter in the time domain, and the first mapping parameter and the second mapping parameter are determined based on the first rule.

26. The method of claim 25, wherein, The first rule comprises a relationship between a symbol index of a reference signal, grouping information, a first parameter and a second parameter, the first parameter and the second parameter being related to the antenna port number.

27. The method of claim 26, wherein, wherein, l=0, 1 represents a time domain orthogonal frequency division multiplexing, OFDM, symbol index of a reference signal; u=1, 2 represents grouping information, k has a value of 0~2N-1; N represents a length of a first sequence, Δ represents a first parameter, t represents a second parameter, s l,u () represents a time domain sequence index corresponding to the lth OFDM symbol in the uth group; y l,u (k) represents the kth reference symbol in the uth group after time domain mapping, y l (k) represents the kth reference symbol after time domain mapping.

28. The method of claim 26 or 27, wherein, The first parameter and the second parameter being related to the antenna port number comprises one or more of: when the antenna port number is port 1, the first parameter is 0 or (2 / 3), and the second parameter is 0; when the antenna port number is port 3, the first parameter is 1, and the second parameter is 0; when the antenna port number is port 5, the first parameter is 0, and the second parameter is 1; or when the antenna port number is port 7, the first parameter is 1, and the second parameter is 1.

29. A method of communication, comprising: comprises: sending first indication information, the first indication information comprising one or more of: a sequence type, an antenna port number or a length of a first sequence; receiving a first signal based on the first indication information, the first signal comprising a reference signal determined by performing a second processing on a second sequence and a third sequence in a time domain according to a first rule, the second sequence and the third sequence being determined by performing a first processing on a first sub-sequence and a second sub-sequence based on a reference signal pattern, the first sub-sequence and the second sub-sequence being determined by grouping a first sequence based on the reference signal pattern, wherein the first sub-sequence is a first group sequence and the second sub-sequence is a second group sequence; the first rule being related to one or more of: an orthogonal code corresponding to the antenna port number, the reference signal pattern or grouping information; the antenna port number being an odd number, the grouping information being a group in which the first sub-sequence and / or the second sub-sequence is located, the reference signal being a signal after time domain mapping.

30. The method of claim 29, wherein, The reference signal pattern comprises reference signal frequency domain density information.

31. The method of claim 30, wherein, When the reference signal frequency domain density information is 1 / 2 and the length of the first sequence is N, the length of the first sub-sequence and the second sub-sequence is N / 2, and the length of the second sequence and the third sequence is 2N, wherein N is a positive integer greater than 1.

32. The method of any one of claims 29-31, wherein: the second sequence comprises four first sub-sequences; and the third sequence comprises four second sub-sequences.

33. The method of any one of claims 29-32, wherein, The reference signal is determined by multiplying the second sequence by a first mapping parameter and adding the third sequence multiplied by a second mapping parameter in the time domain, the first mapping parameter and the second mapping parameter being determined based on the first rule.

34. The method of claim 33, wherein, The first rule comprises a relationship between a symbol index of a reference signal, grouping information, a first parameter and a second parameter, the first parameter and the second parameter being related to the antenna port number.

35. The method of claim 34, wherein, wherein, l=0, 1 represents a time domain orthogonal frequency division multiplexing, OFDM, symbol index of a reference signal; u=1, 2 represents grouping information, k has a value of 0~2N-1; N represents a length of a first sequence, Δ represents a first parameter, t represents a second parameter, s l,u () represents a time domain sequence index corresponding to the lth OFDM symbol in the uth group; y l,u (k) represents the kth reference symbol in the uth group after time domain mapping, y l (k) represents the kth reference symbol after time domain mapping.

36. The method of claim 34 or 35, wherein, The first parameter and the second parameter being related to the antenna port number comprises one or more of: when the antenna port number is port 1, the first parameter is 0 or (2 / 3), and the second parameter is 0; when the antenna port number is port 3, the first parameter is 1 and the second parameter is 0; when the antenna port number is port 5, the first parameter is 0 and the second parameter is 1; or when the antenna port number is port 7, the first parameter is 1 and the second parameter is 1.

37. A communications device, characterized by The apparatus comprises a transceiver unit and a processing unit, the processing unit is configured to perform the processing operations in the method of any of claims 1-36, and the transceiver unit is configured to perform the transceiving operations in the method of any of claims 1-36.

38. A communications device, characterized by The apparatus comprises at least one processor configured to invoke a computer program or instructions stored in a memory to perform the method of any of claims 1-36.

39. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program or instructions, which, when executed on a processor, implement the method of any of claims 1-36.

40. A computer program product, characterised in that, The computer readable storage medium stores a computer program or instructions, which, when executed on a processor, implement the method of any of claims 1-36. The computer readable storage medium stores a computer program or instructions, which, when executed on a processor, implement the method of any of claims 1-36.

Images