Reference signal transmission method and communication device

Abstract

The invention provides a reference signal transmission method and a communication device, which can improve the capacity and can be applied to a communication system. The method comprises: a terminal device determining a first cyclic shift set according to a first mapping relationship and first information; then, the terminal device obtains a first cyclic shift of the reference signal sequence according to the first cyclic shift set. And transmitting the reference signal sequence according to the first cyclic shift. Wherein the first mapping relation comprises a corresponding relation between the K time delay intervals and the K cyclic shift sets; the K time delay intervals are not overlapped, and the K time delay intervals are in one-to-one correspondence with the K cyclic shift sets; k is a positive integer greater than 1, any one cyclic shift set in the K cyclic shift sets comprises at least one cyclic shift, any two cyclic shifts in the K cyclic shift sets are different, and the K time delay intervals are determined according to the maximum time delay.

Description

Reference signal transmission method and communication device Technical Field

[0001] The present application relates to the field of communications, and in particular to a reference signal transmission method and a communication device. Background Art

[0002] In a communication system, when multiple terminal devices use the same time-frequency resources, length, and root Zadoff-Chu (ZC) sequence to send different reference signals to a network device, different cyclic shifts (CSs) can be used to achieve orthogonal multiplexing, allowing the network device to distinguish between different terminal devices. Therefore, the number of cyclic shifts determines the capacity of the communication system.

[0003] In some schemes, the number of cyclic shifts is related to the maximum multipath delay (which may be referred to as the maximum multipath delay) among the multipath delays of all terminal devices served by the network device, the time domain length of the reference signal shift using different cyclic shifts is greater than or equal to the maximum multipath delay, and the time domain length of the shift generated by all cyclic shifts is less than or equal to the length of the symbol, that is, the symbol duration.

[0004] As can be seen from the above, the number of cyclic shifts is limited by the symbol duration and the maximum multipath delay, which results in a limited capacity of the communication system determined by the number of cyclic shifts.

[0005] Summary of the Invention

[0006] The embodiments of the present application provide a reference signal transmission method and a communication device, which can improve the capacity of a communication system.

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

[0008] In a first aspect, a reference signal transmission method is provided. The reference signal transmission method includes: a terminal device determines a first cyclic shift set based on a first mapping relationship and first information. Then, the terminal device obtains a first cyclic shift of a reference signal sequence based on the first cyclic shift set. The reference signal sequence is sent according to the first cyclic shift. The first mapping relationship includes a correspondence between K delay intervals and K cyclic shift sets. The K delay intervals do not overlap with each other, and there is a one-to-one correspondence between the K delay intervals and the K cyclic shift sets. K is a positive integer greater than 1, any cyclic shift set in the K cyclic shift sets contains at least one cyclic shift, any two cyclic shifts in the K cyclic shift sets are different, and the K delay intervals are determined based on the maximum delay.

[0009] Based on the reference signal transmission method provided in the first aspect, the terminal device can determine a first cyclic shift set based on the first mapping relationship and the first information, obtain a first cyclic shift of a reference signal sequence based on the first cyclic shift set, and then send the reference signal sequence based on the first cyclic shift. In this way, a cyclic shift set can be determined for each delay interval based on the upper limit of each delay interval, thereby increasing the total number of cyclic shifts and improving the capacity of the communication system.

[0010] In one possible design, the first information may include latency information of the terminal device. The terminal device determining the first cyclic shift set based on the first mapping relationship and the first information may include: the terminal device determining the first cyclic shift set based on the first mapping relationship and the latency information of the terminal device. In this way, the latency of the terminal device can be matched with the first cyclic shift set to balance latency and interference.

[0011] Exemplarily, the terminal device can determine the delay information of the terminal device by itself, thereby reducing signaling overhead and improving communication efficiency.

[0012] It should be noted that the terminal device may also receive delay information from the network device and determine the delay information as the delay information of the terminal device.

[0013] In one possible design, before the terminal device determines the first cyclic shift set based on the first mapping relationship and the first information, the method provided in the first aspect may further include: the terminal device receiving first information from the network device. The first information includes a first index. In this case, the terminal device determining the first cyclic shift set based on the first mapping relationship and the first information may include: the terminal device determining the first cyclic shift set based on the first index and the first mapping relationship. In this way, the network device carries the first index indicating the delay interval in the first information, thereby reducing signaling overhead and improving communication efficiency.

[0014] In one possible design, obtaining, by a terminal device, a first cyclic shift of a reference signal sequence based on a first cyclic shift set may include: receiving, by the terminal device, a second index; and determining, by the terminal device, the first cyclic shift from the first cyclic shift set based on the second index. In this manner, the network device may allocate cyclic shift indices, thereby reducing conflicts between different terminal devices and improving communication efficiency.

[0015] Exemplarily, the second index may be a cyclic shift index of the first cyclic shift.

[0016] In one possible design, the maximum delay may be the maximum multipath delay.

[0017] Optionally, the delay interval may be a multipath delay interval.

[0018] Among them, the maximum multipath delay can be the maximum value of the maximum multipath delays of the time-domain channels of all terminal devices served by the network device. In this way, each multipath delay interval can be determined according to the maximum multipath delay, and a cyclic shift set can be determined for each multipath delay interval based on the upper limit of each multipath delay interval, so that the total number of cyclic shifts can be increased and the capacity of the communication system can be improved. In addition, since the maximum value of the multipath delay of the time-domain channel of any terminal device does not exceed the maximum multipath delay, any terminal device can select a cyclic shift from a suitable cyclic shift set to avoid conflicts with other terminal devices.

[0019] In a possible design, in the k-th cyclic shift set of the K cyclic shift sets, the minimum distance between any two cyclic shifts can be positively correlated with the maximum delay in the k-th delay interval, where 0 ≤ k < K and k is an integer.

[0020] In this way, the minimum distance between any two cyclic shifts in the k-th cyclic shift set can be designed based on the maximum delay in the k-th delay interval, and the minimum distance between the cyclic shifts in the k-th cyclic shift set can be minimized as much as possible, so as to increase the number of cyclic shifts in the k-th delay interval, and further increase the total number of cyclic shifts.

[0021] In a possible design, in the k-th cyclic shift set of the K cyclic shift sets, the number of cyclic shifts can be positively correlated with the maximum delay and the symbol duration in the k-th delay interval, where 0 ≤ k < K and k is an integer.

[0022] In this way, the number of cyclic shifts in the k-th cyclic shift set can be designed based on the maximum delay in the k-th delay interval, and the number of cyclic shifts in the k-th cyclic shift set can be increased as much as possible, so as to increase the total number of cyclic shifts.

[0023] In a possible design, the method provided in the first aspect may further include: the terminal device receives mapping relationship indication information from the network device. The mapping relationship indication information is used to indicate the first mapping relationship. For example, when there are multiple mapping relationships configured in the terminal device, the network device can indicate the first mapping relationship from the multiple mapping relationships, so as to improve flexibility.

[0024] In a possible design, the method provided in the first aspect may further include: the terminal device receives second information from the network device. The second information is used to indicate the maximum delay. In this way, the network device can indicate the maximum delay, and the terminal device can determine the first mapping relationship according to the maximum delay, which can improve the flexibility.

[0025] Second aspect, a reference signal transmission method is provided. The reference signal transmission method includes: a network device obtaining interval information. The network device determining a first cyclic shift set according to the interval information and a first mapping relationship; the first mapping relationship includes a correspondence between K time delay intervals and K cyclic shift sets; there is a one-to-one correspondence between the K time delay intervals and the K cyclic shift sets, and the K time delay intervals do not overlap; K is a positive integer greater than 1, any one of the K cyclic shift sets includes at least one cyclic shift, any two cyclic shifts in the K cyclic shift sets are different, and the K time delay intervals are determined according to the maximum time delay. The network device receiving a reference signal sequence and demodulating the reference signal sequence according to the first cyclic shift set.

[0026] In a possible design solution, the interval information may include the time delay information of a terminal device.

[0027] In a possible design solution, before the network device receives the reference signal sequence, the method provided in the second aspect may further include: the network device sending a first piece of information. The first piece of information includes a first index.

[0028] In a possible design solution, the method provided in the second aspect may further include: the network device sending a second index.

[0029] Exemplarily, the second index may be the cyclic shift index of the first cyclic shift.

[0030] In a possible design solution, the maximum time delay may be the maximum multipath time delay.

[0031] Optionally, the time delay interval may be a multipath time delay interval.

[0032] In a possible design solution, in the k-th cyclic shift set of the K cyclic shift sets, the minimum distance between any two cyclic shifts is positively correlated with the maximum time delay in the k-th time delay interval. Where 0 ≤ k < K and k is an integer.

[0033] In a possible design solution, in the k-th cyclic shift set of the K cyclic shift sets, the number of cyclic shifts is positively correlated with the maximum time delay in the k-th time delay interval and the symbol duration. Where 0 ≤ k < K and k is an integer.

[0034] In a possible design solution, the method provided in the second aspect further includes: the network device sending mapping relationship indication information. The mapping relationship indication information is used to indicate the first mapping relationship.

[0035] In a possible design solution, the method provided in the second aspect may further include: the network device sending a second piece of information. The second piece of information is used to indicate the maximum time delay.

[0036] In addition, for the technical effects of the reference signal transmission method in the second aspect, reference can be made to the technical effects of the reference signal transmission method in the first aspect, which will not be elaborated here.

[0037] In a third aspect, a reference signal transmission method is provided. K cyclic shift sets are configured in a terminal device. Any one of the K cyclic shift sets contains at least one cyclic shift. The K cyclic shift sets correspond one-to-one with K time delay intervals, and the K time delay intervals do not overlap with each other. K is a positive integer greater than 1. Any two cyclic shifts in the K cyclic shift sets are different, and the K time delay intervals are determined according to the maximum time delay. The reference signal transmission method includes: The terminal device receives a third index from a network device, and the terminal device determines a first cyclic shift set according to the third index. The terminal device determines a first cyclic shift from one of the cyclic shifts in the first cyclic shift set. The terminal device transmits a reference signal sequence according to the first cyclic shift.

[0038] In a possible design, when the terminal device determines a first cyclic shift from one of the cyclic shifts in the first cyclic shift set, it may include: The terminal device randomly determines a first cyclic shift from one of the cyclic shifts in the first cyclic shift set.

[0039] In a possible design, the method provided in the third aspect may further include: The terminal device receives a second index from the network device. When the terminal device determines a first cyclic shift from one of the cyclic shifts in the first cyclic shift set, it may include: The terminal device determines the cyclic shift corresponding to the second index in the first cyclic shift set as the first cyclic shift.

[0040] In a possible design, in the k-th cyclic shift set of the K cyclic shift sets, the minimum distance between any two cyclic shifts is positively correlated with the maximum time delay in the k-th time delay interval. Where 0 ≤ k < K, and k is an integer.

[0041] In a possible design, in the k-th cyclic shift set of the K cyclic shift sets, the number of cyclic shifts is positively correlated with the maximum time delay in the k-th time delay interval and the symbol duration. Where 0 ≤ k < K, and k is an integer.

[0042] In a possible design, the method provided in the third aspect may further include: The terminal device receives group indication information from the network device. The group indication information is used to indicate the K cyclic shift sets.

[0043] In addition, for the technical effects of the reference signal transmission method in the third aspect, reference can be made to the technical effects of the reference signal transmission method in the first aspect, which will not be elaborated here.

[0044] In a fourth aspect, a reference signal transmission method is provided. The reference signal transmission method includes: a network device obtaining interval information. The network device determines a first cyclic shift set according to the interval information and a first mapping relationship. The network device receives a reference signal sequence, and the network device demodulates the reference signal sequence according to the first cyclic shift set. The first mapping relationship includes a correspondence between K time delay intervals and K cyclic shift sets; there is a one-to-one correspondence between the K time delay intervals and the K cyclic shift sets, and the K time delay intervals do not overlap; K is a positive integer greater than 1, any one of the K cyclic shift sets includes at least one cyclic shift, any two cyclic shifts in the K cyclic shift sets are different, and the K time delay intervals are determined according to the maximum time delay.

[0045] In a possible design, the method provided in the fourth aspect may further include: the network device sending a third index.

[0046] In a possible design, in the k-th cyclic shift set of the K cyclic shift sets, the minimum distance between any two cyclic shifts is positively correlated with the maximum time delay in the k-th time delay interval. Where 0 ≤ k < K and k is an integer.

[0047] In a possible design, in the k-th cyclic shift set of the K cyclic shift sets, the number of cyclic shifts is positively correlated with the maximum time delay in the k-th time delay interval and the symbol duration. Where 0 ≤ k < K and k is an integer.

[0048] In a possible design, the method provided in the fourth aspect may further include: the network device sending group indication information. The group indication information is used to indicate the K cyclic shift sets.

[0049] In addition, the technical effects of the reference signal transmission method in the fourth aspect can refer to the technical effects of the reference signal transmission method in the first aspect, which will not be elaborated here.

[0050] In a fifth aspect, a communication device is provided. The communication device includes: a processing module and a transceiver module. The processing module is configured to determine a first cyclic shift set according to a first mapping relationship and first information. The first mapping relationship includes a correspondence between K time delay intervals and K cyclic shift sets. The K time delay intervals do not overlap, and there is a one-to-one correspondence between the K time delay intervals and the K cyclic shift sets. K is a positive integer greater than 1, any one of the K cyclic shift sets includes at least one cyclic shift, any two cyclic shifts in the K cyclic shift sets are different, and the K time delay intervals are determined according to the maximum time delay. The processing module is configured to obtain a first cyclic shift of a reference signal sequence according to the first cyclic shift set. The transceiver module is configured to send the reference signal sequence according to the first cyclic shift.

[0051] In a possible design solution, the first information may include the delay information of the terminal device. The processing module may specifically be used to determine the first cyclic shift set according to the first mapping relationship and the delay information of the terminal device.

[0052] In a possible design solution, the transceiver module may also be used to receive the first information from the network device. The first information includes a first index. The processing module may specifically be used to determine the first cyclic shift set according to the first index and the first mapping relationship.

[0053] In a possible design solution, the processing module may specifically be used to receive the second index through the transceiver module. And determine the first cyclic shift from the first cyclic shift set according to the second index.

[0054] In a possible design solution, the maximum delay may be the maximum multipath delay.

[0055] Optionally, the delay interval may be a multipath delay interval.

[0056] In a possible design solution, in the k-th cyclic shift set of the K cyclic shift sets, the minimum distance between any two cyclic shifts may be positively correlated with the maximum delay in the k-th delay interval, where 0 ≤ k < K and k is an integer.

[0057] In a possible design solution, in the k-th cyclic shift set of the K cyclic shift sets, the number of cyclic shifts may be positively correlated with the maximum delay in the k-th delay interval and the symbol duration, where 0 ≤ k < K and k is an integer.

[0058] In a possible design solution, the transceiver module may also be used to receive the mapping relationship indication information from the network device. The mapping relationship indication information is used to indicate the first mapping relationship.

[0059] In a possible design solution, the transceiver module may also be used to receive the second information from the network device. The second information is used to indicate the maximum delay.

[0060] Optionally, the transceiver module may include a receiving module and a sending module. The transceiver module is used to implement the sending function and receiving function of the communication device in the fifth aspect.

[0061] Optionally, the communication device in the fifth aspect may further include a storage module that stores programs or instructions. When the processing module executes the programs or instructions, the communication device can execute the reference signal transmission method in the first aspect.

[0062] It should be noted that the communication device in the fifth aspect can be a terminal device, or a chip (system) or other components or assemblies that can be set in the terminal device, or a device including the terminal device. This application does not make any limitations in this regard.

[0063] In addition, for the technical effects of the communication device in the fifth aspect, reference can be made to the technical effects of the reference signal transmission method in the first aspect, which will not be elaborated here.

[0064] In a sixth aspect, a communication device is provided. The communication device includes: a processing module and a transceiver module. The processing module is configured to obtain interval information. The processing module is further configured to determine a first cyclic shift set according to the interval information and a first mapping relationship. The first mapping relationship includes the correspondence between K delay intervals and K cyclic shift sets. There is a one-to-one correspondence between the K delay intervals and the K cyclic shift sets, and the K delay intervals do not overlap with each other. K is a positive integer greater than 1. Any one of the K cyclic shift sets includes at least one cyclic shift, and any two cyclic shifts in the K cyclic shift sets are different. The K delay intervals are determined according to the maximum delay. The transceiver module is configured to receive a reference signal sequence. The processing module is further configured to demodulate the reference signal sequence according to the first cyclic shift set. [[ID=][8]]

[0065] In a possible design, the interval information may include the delay information of the terminal device.

[0066] In a possible design, the transceiver module may further be configured to send a first piece of information. The first piece of information includes a first index.

[0067] In a possible design, the transceiver module may further be configured to send a second index.

[0068] In a possible design, the maximum delay may be the maximum multipath delay.

[0069] In a possible design, the delay interval may be a multipath delay interval.

[0070] In a possible design, in the k-th cyclic shift set of the K cyclic shift sets, the minimum distance between any two cyclic shifts may be positively correlated with the maximum delay in the k-th delay interval. Where 0 ≤ k < K and k is an integer.

[0071] In a possible design, in the k-th cyclic shift set of the K cyclic shift sets, the number of cyclic shifts may be positively correlated with the maximum delay in the k-th delay interval and the symbol duration. Where 0 ≤ k < K and k is an integer.

[0072] In a possible design scheme, the transceiver module can also be used to send mapping relationship indication information, where the mapping relationship indication information is used to indicate the first mapping relationship.

[0073] In one possible design scheme, the transceiver module can also be used to send second information, where the second information is used to indicate the maximum delay.

[0074] Optionally, the transceiver module may include a receiving module and a sending module, wherein the transceiver module is used to implement the sending function and the receiving function of the communication device of the sixth aspect.

[0075] Optionally, the communication device of the sixth aspect may further include a storage module, wherein the storage module stores a program or instruction. When the processing module executes the program or instruction, the communication device may execute the reference signal transmission method of the second aspect.

[0076] It should be noted that the communication device in the sixth aspect can be a network device, or a chip (system) or other parts or components that can be set in the network device, or a device that includes a network device. This application does not limit this.

[0077] In addition, the technical effects of the communication device in the sixth aspect can refer to the technical effects of the reference signal transmission method in the first aspect, and will not be repeated here.

[0078] In a seventh aspect, a communication device is provided. The communication device is configured with K cyclic shift sets, each of the K cyclic shift sets includes at least one cyclic shift, the K cyclic shift sets correspond one-to-one to K delay intervals, and the K delay intervals do not overlap, K is a positive integer greater than 1, any two cyclic shifts in the K cyclic shift sets are different, and the K delay intervals are determined based on a maximum delay. The transceiver module is configured to receive a third index from a network device. The processing module is configured to determine a first cyclic shift set based on the third index, and to determine a cyclic shift in the first cyclic shift set as a first cyclic shift.

[0079] In a possible design scheme, the processing module is specifically configured to randomly determine a cyclic shift in the first cyclic shift set as the first cyclic shift.

[0080] In a possible design solution, the transceiver module is further configured to receive a second index from the network device. The processing module is specifically configured to cause the terminal device to determine the cyclic shift corresponding to the second index in the first cyclic shift set as the first cyclic shift.

[0081] In a possible design, in the k-th cyclic shift set of K cyclic shift sets, the minimum distance between any two cyclic shifts is positively correlated with the maximum time delay in the k-th time delay interval, where 0 ≤ k < K and k is an integer.

[0082] In a possible design, in the k-th cyclic shift set of K cyclic shift sets, the number of cyclic shifts is positively correlated with the maximum time delay in the k-th time delay interval and the symbol duration, where 0 ≤ k < K and k is an integer.

[0083] In a possible design, the transceiver module is further configured to receive group indication information from a network device, and the group indication information is used to indicate K cyclic shift sets.

[0084] Optionally, the transceiver module may include a receiving module and a transmitting module. The transceiver module is configured to implement the transmitting and receiving functions of the communication device in the seventh aspect.

[0085] Optionally, the communication device in the seventh aspect may further include a storage module that stores programs or instructions. When the processing module executes the programs or instructions, the communication device can execute the reference signal transmission method in the third aspect.

[0086] It should be noted that the communication device in the seventh aspect may be a terminal device, or a chip (system) or other components or assemblies that can be set in the terminal device, or a device including the terminal device. This application does not make any limitations in this regard.

[0087] In addition, the technical effects of the communication device in the seventh aspect can refer to the technical effects of the reference signal transmission method in the first aspect, which will not be elaborated here.

[0088] In an eighth aspect, a communication device is provided. The communication device includes: a processing module and a transceiver module.

[0089] The transceiver module is configured to obtain interval information. The processing module is configured to determine a first cyclic shift set according to the interval information and a first mapping relationship. The transceiver module is further configured to receive a reference signal sequence. The processing module is further configured to demodulate the reference signal sequence according to the first cyclic shift set. The first mapping relationship includes the corresponding relationship between K time delay intervals and K cyclic shift sets; there is a one-to-one correspondence between the K time delay intervals and the K cyclic shift sets, and the K time delay intervals do not overlap; K is a positive integer greater than 1, any cyclic shift set in the K cyclic shift sets includes at least one cyclic shift, any two cyclic shifts in the K cyclic shift sets are different, and the K time delay intervals are determined according to the maximum time delay.

[0090] In a possible design, the transceiver module is further configured to transmit a third index.

[0091] In a possible design, in the k-th cyclic shift set of the K cyclic shift sets, the minimum distance between any two cyclic shifts is positively correlated with the maximum time delay in the k-th time delay interval, where 0 ≤ k < K and k is an integer.

[0092] In a possible design, in the k-th cyclic shift set of the K cyclic shift sets, the number of cyclic shifts is positively correlated with the maximum time delay in the k-th time delay interval and the symbol duration, where 0 ≤ k < K and k is an integer.

[0093] In a possible design, the transceiver module is further configured to send group indication information. The group indication information is used to indicate the K cyclic shift sets.

[0094] Optionally, the transceiver module may include a receiving module and a transmitting module. The transceiver module is configured to implement the transmitting function and the receiving function of the communication device in the eighth aspect.

[0095] Optionally, the communication device in the eighth aspect may further include a storage module that stores programs or instructions. When the processing module executes the programs or instructions, the communication device can execute the reference signal transmission method in the fourth aspect.

[0096] It should be noted that the communication device in the eighth aspect may be a network device, or a chip (system) or other component or assembly that can be disposed in a network device, or a device including a network device. This application does not make any limitations in this regard.

[0097] In addition, the technical effects of the communication device in the eighth aspect can refer to the technical effects of the reference signal transmission method in the first aspect, which will not be elaborated here.

[0098] In a ninth aspect, a communication device is provided. The communication device is configured to execute the reference signal transmission method described in any one of the first aspect to the fourth aspect.

[0099] In this application, the communication device described in the ninth aspect may be the terminal device described in any one of the first aspect or the third aspect, or the network device described in any one of the second aspect or the fourth aspect, or a chip (system) or other component or assembly that can be disposed in the terminal device or the network device, or a device including the terminal device or the network device.

[0100] It should be understood that the communication device described in the ninth aspect includes a module, unit, or means corresponding to the reference signal transmission method described in any one of the first to fourth aspects above. The module, unit, or means can be implemented through hardware, software, or hardware executing the corresponding software implementation. The hardware or software includes one or more modules or units for performing the functions involved in the reference signal transmission method described above.

[0101] In a tenth aspect, a communication device is provided, comprising: a processor configured to execute the reference signal transmission method according to any possible implementation of the first to fourth aspects.

[0102] In one possible design solution, the communication device described in the tenth aspect may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in the tenth aspect to communicate with other communication devices.

[0103] In one possible design, the communication device described in aspect 10 may further include a memory. The memory may be integrated with the processor or provided separately. The memory may be used to store computer programs and / or data related to the reference signal transmission method described in any one of aspects 1 to 4.

[0104] In the present application, the communication device described in the tenth aspect can be the terminal device in the first aspect, or the third aspect, or the network device in the second aspect, or the fourth aspect, or a chip (system) or other parts or components that can be set in the terminal device or network device, or a device that includes the terminal device or network device.

[0105] In an eleventh aspect, a communication device is provided. The communication device includes: a processor coupled to a memory, the processor configured to execute a computer program stored in the memory, so that the communication device performs the reference signal transmission method described in any possible implementation of the first to fourth aspects.

[0106] In one possible design solution, the communication device described in the eleventh aspect may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in the eleventh aspect to communicate with other communication devices.

[0107] In the present application, the communication device described in the eleventh aspect can be the terminal device in the first aspect or the third aspect or the network device in the second aspect or the fourth aspect, or a chip (system) or other parts or components that can be set in the terminal device or network device, or a device that includes the terminal device or network device.

[0108] In the twelfth aspect, a communication device is provided, comprising: a processor and a memory; the memory is used to store a computer program, and when the processor executes the computer program, the communication device executes the reference signal transmission method described in any one of the implementation methods of the first to fourth aspects.

[0109] In one possible design solution, the communication device described in aspect 12 may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in aspect 12 to communicate with other communication devices.

[0110] In the present application, the communication device described in the twelfth aspect can be the terminal device in the first aspect or the third aspect or the network device in the second aspect or the fourth aspect, or a chip (system) or other parts or components that can be set in the terminal device or network device, or a device that includes the terminal device or network device.

[0111] In the thirteenth aspect, a communication device is provided, comprising: a processor; the processor is used to couple with a memory, and after reading a computer program in the memory, execute the reference signal transmission method as described in any one of the implementation methods of the first to fourth aspects according to the computer program.

[0112] In one possible design solution, the communication device described in aspect 13 may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in aspect 13 to communicate with other communication devices.

[0113] In the present application, the communication device described in the thirteenth aspect can be the terminal device in the first aspect or the third aspect or the network device in the second aspect or the fourth aspect, or a chip (system) or other parts or components that can be set in the terminal device or network device, or a device that includes the terminal device or network device.

[0114] In addition, the technical effects of the communication devices described in the ninth to thirteenth aspects above can refer to the technical effects of the reference signal transmission methods described in the first to fourth aspects above, and will not be repeated here.

[0115] In a fourteenth aspect, a processor is provided, wherein the processor is configured to execute the reference signal transmission method described in any possible implementation manner of the first to fourth aspects.

[0116] In a fifteenth aspect, a communication system is provided. The communication system includes one or more terminal devices as described in the first aspect, and one or more network devices as described in the second aspect. Alternatively, the communication system includes one or more terminal devices as described in the third aspect, and one or more network devices as described in the fourth aspect. The terminal devices may be configured to perform the reference signal transmission method described in any one of the first or third aspects, and the network devices may be configured to perform the reference signal transmission method described in any one of the second or fourth aspects.

[0117] In the sixteenth aspect, a computer-readable storage medium is provided, comprising: a computer program or instructions; when the computer program or instructions are run on a computer, the computer is enabled to execute the reference signal transmission method described in any possible implementation method of the first to fourth aspects.

[0118] In the seventeenth aspect, a computer program product is provided, comprising a computer program or instructions, which, when executed on a computer, enables the computer to execute the reference signal transmission method described in any one of the possible implementations of the first to fourth aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0119] FIG1 is a schematic diagram showing the relationship between the cyclic shift region and the symbol duration provided by an embodiment of the present application;

[0120] FIG2 is a schematic diagram of the architecture of a communication system provided in an embodiment of the present application;

[0121] FIG3 is a schematic diagram of a first flow chart of a reference signal transmission method according to an embodiment of the present application;

[0122] FIG4 is a schematic diagram showing the relationship between cyclic shift and symbol duration in different scenarios provided by an embodiment of the present application;

[0123] FIG5 is a second flow chart of a reference signal transmission method according to an embodiment of the present application;

[0124] FIG6 is a first structural diagram of a communication device provided in an embodiment of the present application;

[0125] FIG7 is a second structural diagram of the communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0126] The following introduces the technical terms involved in the embodiments of this application.

[0127] 1. Maximum multipath delay: refers to the maximum multipath delay among the multipath delays (delays corresponding to multiple channels / delays corresponding to multiple transmission paths) of all terminal devices within the service range of the network device. For example, there are three terminal devices within the service range of the network service, the maximum multipath delay of terminal device 0 is A0, the maximum multipath delay of terminal device 1 is A1, and the maximum multipath delay of terminal device 0 is A2. The maximum multipath delay can be the maximum value of A0, A1 and A2. It should be noted that the value of the maximum multipath delay can be different in different application environments. The network device can indicate different maximum multipath delays through signaling based on different application scenarios, that is, indicate different maximum multipath delays.

[0128] 2. The root mean square delay of a terminal device may refer to the delay determined based on the second-order moment of the power delay spectrum of the terminal device's channel. The root mean square delay of different terminal devices may be different, and the maximum root mean square delay may be the maximum root mean square delay of all terminal devices.

[0129] 3. The average delay of a terminal device may refer to the delay determined based on the first-order moment of the power delay spectrum of the terminal device's channel. The average delay of different terminal devices may be different, and the maximum average delay may be the maximum value of the average delays of all terminal devices.

[0130] 4. Time window: It can refer to the duration of the power delay spectrum of the terminal device, in which the power accounts for q percent of the total power of the power delay spectrum of the terminal device. The time windows of different terminal devices may be different, and the maximum time window may be the maximum value of the time windows of all terminal devices. For example, the power delay spectrum of the terminal device is represented by P, and the power value of the tth time window is represented by P(t). The starting time of t is time t0, and the end time is time t3. Time t1 and time t2 can be determined, time t1 does not exceed time t2, and time t1 and time t2 are not less than time t0, and do not exceed time t3. The sum of the powers of the power delay spectrum between time t1 and time t2 accounts for q percent of the total power (that is, the sum of the powers of the power delay spectrum between time t0 and time t3), and the sum of the powers of the power delay spectrum between time t0 and time t1 and the sum of the powers of the power delay spectrum between time t2 and time t3 are the same, then the value of t2-t1 can be considered as the length of the time window. The value of q can be predefined, such as 50.

[0131] 5. Symbol Cyclic Prefix Duration: A symbol can be a data symbol or a reference signal symbol. As can be appreciated, since different paths in a multipath channel can have different channel delays, using a cyclic prefix can mitigate inter-symbol interference caused by the multipath channel. The duration of the cyclic prefix is ​​generally close to or exceeds the maximum multipath delay.

[0132] The symbol may be an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single-Carrier Frequency Division Multiple Access (SC-FDMA) symbol, which is not limited in this application. The symbol may also be called a time domain symbol.

[0133] 6. Maximum Delay: The maximum delay can be a predefined delay. Alternatively, the maximum delay can be a delay notified to the terminal device by the network device via signaling. The maximum delay can be determined based on one or more of the following: maximum multipath delay, maximum root mean square delay, maximum average delay, maximum time window, or duration of a symbol cyclic prefix. For example, the maximum delay can be one of the following: maximum multipath delay, maximum root mean square delay, maximum average delay, maximum time window, or duration of a symbol cyclic prefix.

[0134] 7. Circular shift: It can also be called the circular shift value, which can refer to the number of bits to be circularly shifted.

[0135] 8. Cyclic shift region: The cyclic shift region can be a time region of the time domain channel. Based on the received reference signal of one symbol or multiple symbols, the network device can perform channel estimation to obtain the estimated frequency domain channel and the time domain channel corresponding to the frequency domain channel. The time domain channel can be divided into one or more cyclic shift regions, and different cyclic shift regions do not overlap. A cyclic shift in the kth cyclic shift set of K cyclic shift sets corresponds to a cyclic shift region, and any two cyclic shifts in the kth cyclic shift set correspond to two different cyclic shift regions. The size of the cyclic shift region corresponding to the kth cyclic shift set (i.e., the duration of the cyclic shift region) can be positively correlated with the maximum delay in the delay interval. Wherein, k is an integer greater than or equal to 0, K is an integer greater than 1, and k <K。

[0136] For example, when a terminal device selects a cyclic shift of a cyclic shift set to send a reference signal sequence, a network device receives the reference signal sequence sent by the terminal device, performs channel estimation to obtain the time domain channel of the terminal device, then most or all of the energy of the time domain channel of the terminal device is contained in the cyclic shift region corresponding to the cyclic shift selected by the terminal device.

[0137] The following describes solutions related to the embodiments of this application.

[0138] In a communication system, when multiple terminal devices use the same time-frequency resources, length, and root ZC sequence to send different reference signals to a network device, different CSs can be used to achieve orthogonal multiplexing, allowing the network device to distinguish between different terminal devices. Therefore, the number of CSs determines the capacity of the communication system.

[0139] In some possible embodiments, the number of CSs is related to the maximum multipath delay (also referred to as the maximum multipath delay) among the multipath delays of all terminal devices served by the network device, the time domain length of the shift generated by using reference signals of different CSs is greater than or equal to the maximum multipath delay, and the time domain length of the shift generated by all cyclic shifts, that is, the cyclic shift (CS) region is less than or equal to the length of the symbol used to transmit the reference signal, that is, the symbol duration. In other words, the number of cyclic shifts and the time domain channels of all terminal devices served by the network device can satisfy the following relationship: N cs,base T max ≤T symb Among them, N cs,base is the number of cyclic shifts within the service range of the network device (also called the basic cyclic shift number), T max is the maximum delay of the terminal device within the service range of the network device, T symb is the symbol duration.

[0140] If the network device determines that the maximum number of terminal devices that can be distinguished by the reference signal is 4 based on the delay of the terminal devices within its service range, such as multipath delay, then 4*T max ≤T symb . With 4*T max =T symb As an example, the relationship between the cyclic shift region and the symbol duration is shown in FIG1 , and the total duration of CS region 0 to CS region 3 is equal to T symb .

[0141] As can be seen from the above, the number of CSs is limited by the symbol duration and the maximum multipath delay, which results in a limited capacity of the communication system determined by the number of cyclic shifts.

[0142] In order to solve the above technical problems, a reference signal transmission method is provided in an embodiment of the present application, which includes: the terminal device determines a first cyclic shift set based on a first mapping relationship and first information. Then, the terminal device obtains the first cyclic shift of the reference signal sequence according to the first cyclic shift set. The reference signal sequence is sent according to the first cyclic shift. Among them, the first mapping relationship includes a correspondence between K delay intervals and K cyclic shift sets; the K delay intervals do not overlap with each other, and there is a one-to-one correspondence between the K delay intervals and the K cyclic shift sets; K is a positive integer greater than 1, any cyclic shift set in the K cyclic shift sets contains at least one cyclic shift, any two cyclic shifts in the K cyclic shift sets are different, and the K delay intervals are determined according to the maximum delay.

[0143] Alternatively, the terminal device can be configured with multiple cyclic shift sets, and the network device can specify a first cyclic shift set from the multiple cyclic shift sets. The terminal device can then further determine a first cyclic shift from the first cyclic shift set and send a reference signal based on the first cyclic shift. In this way, a cyclic shift set can be determined for each delay interval, thereby increasing the total number of cyclic shifts and improving the capacity of the communication system. The technical solutions of this application will be described below in conjunction with the accompanying drawings.

[0144] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as narrowband Internet of Things (NB-IoT), global system for mobile communications (GSM), enhanced data rate for GSM evolution (EDGE), wideband code division multiple access (WCDMA), code division multiple access 2000 (CDMA2000), time division-synchronization code division multiple access (TD-SCDMA), wireless fidelity (WiFi), vehicle to everything (V2X) communication system, device-to-device (D2D) communication system, Internet of Vehicles communication system, 4th generation (4G) mobile communication system, such as long term evolution (LTE), world wide interoperability for microwave access (WiMAX), fifth generation (5G) communication system. Generation (5G) mobile communication systems, such as new radio (NR) systems, and future communication systems, such as sixth generation (6G) mobile communication systems. This application will present various aspects, embodiments, or features around a system that may include multiple devices, components, modules, etc. It should be understood and appreciated that each system may include additional devices, components, modules, etc., and / or may not include all of the devices, components, modules, etc. discussed in conjunction with the accompanying drawings. In addition, combinations of these solutions may also be used.

[0145] Additionally, in the embodiments of this application, words such as "exemplarily" and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as an "exemplary" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of the word "exemplary" is intended to present concepts in a concrete manner.

[0146] In the embodiments of the present application, the terms "information," "signal," "message," "channel," and "signaling" may sometimes be used interchangeably. It should be noted that, when the distinction between them is not emphasized, the meanings they intend to convey are the same. The terms "of," "corresponding," and "corresponding" may sometimes be used interchangeably. It should be noted that, when the distinction between them is not emphasized, the meanings they intend to convey are the same.

[0147] In the embodiments of the present application, sometimes a subscript such as W1 may be mistakenly written as a non-subscript form such as W1. When the difference is not emphasized, the meanings to be expressed are the same.

[0148] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Ordinary technicians in this field will know that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0149] To facilitate understanding of the embodiments of the present application, a communication system applicable to the embodiments of the present application is first described in detail using the communication system shown in Figure 2 as an example. For example, Figure 2 is a schematic diagram of the architecture of a communication system applicable to the reference signal transmission method provided in the embodiments of the present application.

[0150] As shown in FIG2 , the communication system includes a network device 201 and terminal devices ( 202 a , 202 b ).

[0151] A communication connection can be established between the network device 201 and the terminal devices (202a, 202b).

[0152] The network device is a device located on the network side of the communication system and having wireless transceiver functions, or a chip or chip system that can be set in the device. The network device includes but is not limited to: an access point (AP) in a wireless fidelity (WiFi) system, such as a home gateway, a router, a server, a switch, a bridge, etc., a macro base station, a micro base station (also known as a small station), 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 (e.g., home evolved NodeB, or home Node B, HNB), a baseband unit (BBU), a wireless relay node, a wireless backhaul node, a transmission and reception point (TRP or transmission point, TP), etc. It can also be 5G, such as the new air interface (NEI). The term "5G NR" refers to a gNB in ​​a new wireless radio (NR) system, a satellite, a drone, a transmission point (TRP or TP), one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system, or a network node constituting a gNB or a transmission point, such as a baseband unit (BBU), a distributed unit (DU), a roadside unit (RSU) with base station functionality, etc.

[0153] It should be noted that the aforementioned network device may refer to a cell, meaning that one network device corresponds to one cell. When the network device is a base station, it may include a base station unit (BBU) and a remote radio unit (RRU). The BBU and RRU can be placed in different locations. For example, the RRU can be remotely located in a high-traffic area, while the BBU can be placed in a central equipment room. Alternatively, the BBU and RRU can be placed in the same equipment room. Alternatively, the BBU and RRU can be separate components within the same rack.

[0154] The terminal device is a terminal that accesses the communication system and has wireless transceiver capabilities, or a chip or chip system that can be installed in the terminal. The terminal device can also be called an access terminal, subscriber unit, user station, mobile station, mobile station (MS), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device. The terminal device in the embodiments of the present application can be a mobile phone, a tablet computer, a cellular phone, a smart phone, a wireless data card, a personal digital assistant (PDA) computer, a wireless modem, a handheld device (handset), a laptop computer, a machine type communication (MTC) terminal, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, a vehicle-mounted terminal, an RSU with terminal function, a drone, etc. The terminal device of the present application can also be a vehicle-mounted module, vehicle-mounted module, vehicle-mounted component, vehicle-mounted chip or vehicle-mounted unit built into the vehicle as one or more components or units. The vehicle can implement the reference signal transmission method provided by the present application through the built-in vehicle-mounted module, vehicle-mounted module, vehicle-mounted component, vehicle-mounted chip or vehicle-mounted unit.

[0155] It should be noted that the reference signal transmission method provided in the embodiment of the present application can be applied between any two nodes shown in Figure 2, such as between terminal devices, between network devices, and between terminal devices and network devices. The specific implementation can refer to the following method embodiment, which will not be repeated here.

[0156] It should be noted that the solutions in the embodiments of the present application can also be applied to other communication systems, and the corresponding names can also be replaced by the names of corresponding functions in other communication systems.

[0157] It should be understood that FIG2 is only a simplified schematic diagram for ease of understanding, and the communication system may also include other network devices and / or other terminal devices, which are not shown in FIG2 .

[0158] The reference signal transmission method provided in the embodiment of the present application will be described in detail below with reference to FIG3-FIG5.

[0159] In some embodiments, a first cyclic shift set can be determined from a first mapping relationship based on information related to the delay interval, and a first cyclic shift can be further determined from the first cyclic shift set, and then a reference signal sequence can be transmitted based on the first cyclic shift. For example, the process of transmitting a reference signal sequence described in this embodiment can refer to the reference signal transmission method shown in FIG3 .

[0160] For example, Figure 3 is a flowchart diagram 1 of a reference signal transmission method according to an embodiment of the present application. The reference signal transmission method can be applied to communication between any two nodes shown in Figure 2 .

[0161] As shown in FIG3 , the reference signal transmission method includes the following steps:

[0162] S301: The terminal device determines a first cyclic shift set according to a first mapping relationship and first information.

[0163] The terminal device may be any terminal device in FIG. 2 .

[0164] The first mapping relationship includes a correspondence between K delay intervals and K cyclic shift sets. The K delay intervals do not overlap, are determined based on the maximum delay, and have a one-to-one correspondence between the K delay intervals and the K cyclic shift sets. K is a positive integer greater than 1, any cyclic shift set in the K cyclic shift sets includes at least one cyclic shift, and any two cyclic shifts in the K cyclic shift sets are different.

[0165] The maximum delay can be described above. For example, it can be the maximum delay among all terminal devices within the service range of the network device. Alternatively, the maximum delay can be a predefined delay. Alternatively, the maximum delay can be the delay notified to the terminal device by the network device via signaling. The maximum delay can be determined based on one or more of the following: maximum multipath delay, maximum root mean square delay, maximum average delay, maximum time window, or the duration of the cyclic prefix of a symbol.

[0166] The delay interval can be a delay range divided according to the magnitude of the delay of the terminal device. The delay interval can be related to one or more of the following delays: multipath delay, root mean square delay, average delay, time window, or the duration of the cyclic prefix of a symbol. In other words, the delay interval is a range of one or more of the following: multipath delay range, root mean square delay range, average delay range, time window range, or the duration range of the cyclic prefix of a symbol.

[0167] It should be noted that the delay interval can be determined according to the maximum delay. For example, taking the case where the maximum delay is determined as the maximum multipath delay, the delay interval can be determined according to the maximum multipath delay. That is to say, at this time, the delay interval can be a range of multipath delays, that is, a multipath delay interval. The k-th delay interval among K delay intervals can be expressed as: or or or where k = 0, 1, 2, …, K - 1, and k is the serial number of the delay interval. is the minimum value of the k-th delay interval or the lower limit of the k-th delay interval, can be called the maximum value of the k-th delay interval or the upper limit of the k-th delay interval.

[0168] Among them, the maximum multipath delay can be the maximum value of the maximum multipath delays of the time-domain channels of all terminal devices served by the network device. In this way, each multipath delay interval can be determined according to the maximum multipath delay, and a set of cyclic shifts can be determined for each multipath delay interval based on the upper limit of each multipath delay interval, so that the total number of cyclic shifts can be increased and the capacity of the communication system can be improved. In addition, since the maximum value of the multipath delay of the time-domain channel of any terminal device does not exceed the maximum multipath delay, any terminal device can select a cyclic shift from a suitable set of cyclic shifts to avoid conflicts with other terminal devices.

[0169] The set of cyclic shifts refers to a set of cyclic shifts. In each set of cyclic shifts, there is at least one cyclic shift. The implementation principle of the number of cyclic shifts in the set of cyclic shifts can be referred to the following, for example, for the relevant introduction, which will not be elaborated here.

[0170] In addition, it should be noted that in the embodiments of the present application, in the k-th set of cyclic shifts of the K sets of cyclic shifts, the minimum distance between any two cyclic shifts is positively correlated with the upper limit of the k-th delay interval, where 0 ≤ k < K and k is an integer.

[0171] Thus, based on the maximum time delay (i.e., the upper limit) in the k-th time delay interval, the minimum distance between any two cyclic shifts in the k-th cyclic shift set can be designed, and the minimum distance of the cyclic shifts in the k-th cyclic shift set can be minimized as much as possible, thereby increasing the number of cyclic shifts in the k-th time delay interval, and further increasing the total number of cyclic shifts.

[0172] In the k-th cyclic shift set of the K cyclic shift sets, the number of cyclic shifts is positively correlated with the upper limit of the k-th time delay interval (which can be called the maximum time delay of the k-th time delay interval) and the symbol duration, where 0 ≤ k < K and k is an integer.

[0173] Thus, based on the maximum time delay in the k-th time delay interval, the number of cyclic shifts in the k-th cyclic shift set can be designed, and the number of cyclic shifts in the k-th cyclic shift set can be increased as much as possible, thereby increasing the total number of cyclic shifts.

[0174] Optionally, each cyclic shift in the k-th cyclic shift set corresponds to a cyclic shift index.

[0175] The K time delay intervals do not overlap with each other, and the K time delay intervals are determined according to the maximum time delay. That is to say, the time delays covered by different time delay intervals in the K time delay intervals are all different (that is, if the time delay of the terminal device belongs to the k-th time delay interval, the time delay of the terminal device does not belong to other time delay intervals), and each time delay interval in the K time delay intervals is related to the maximum time delay. Exemplarily, if the maximum time delay is T max , and K is 3, the K time delay intervals can be respectively: [0, T max / 3), Or, Or, At this time, the number of cyclic shift sets is also 3. The time delay of the terminal device belongs to one time delay interval, that is to say, this interval contains the time delay of the terminal device. Exemplarily, if the interval is The time delay of the terminal device is t delay , when Then, it means that t delay belongs to the interval Or it can be said that the interval contains t delay , which can be expressed as

[0176] There is a one-to-one correspondence between the K time delay intervals and the K cyclic shift sets. That is to say, each time delay interval corresponds to a cyclic shift set, and the cyclic shift sets corresponding to different time delay intervals are different from each other. Taking the K time delay intervals including [0, T max / 3), [T max / 3, 2Tmax / 3), and [2T max / 3,T max ] as an example, the delay interval [0,T max / 3) corresponds to the cyclic shift set P0, the delay interval [T max / 3,2T max / 3) corresponds to the cyclic shift set P1, the delay interval [2T max / 3,T max ] corresponds to the cyclic shift set P2. In this case, the correspondence between the delay interval and the cyclic shift set in the first mapping relationship is shown in Table 1 below:

[0177] Table 1

[0178] Delay interval [0,T max / 3)[T max / 3,2T max / 3)[2T max / 3,T max ]Cyclic shift setCyclic shift set P0Cyclic shift set P1Cyclic shift set P2

[0179] The first information may include: delay information of the terminal device, or a first index.

[0180] The delay information of the terminal device may include one or more of the following delays: the multipath delay of the terminal device, the root mean square delay of the terminal device, the average delay of the terminal device, the time window of the terminal device, or the duration of the cyclic prefix of the symbol of the terminal device. It should be noted that the delay in the delay information is related to the maximum delay of the terminal device. For example, the delay in the delay information may be the multipath delay of the terminal device. Furthermore, the delay in the delay information may be the maximum multipath delay of the terminal device. The delay information of the terminal device may be determined by the terminal device itself or from a network device.

[0181] For example, the terminal device's latency information can be acquired by the terminal device itself through sensing. For example, the terminal device can transmit a signal such as a carrier signal or a single-tone signal as a sensing signal, then receive signals reflected from network devices and / or surrounding objects, and estimate the latency of the terminal device based on the received signals, thereby obtaining the latency information.

[0182] For another example, the terminal device's latency information may come from a network device. For example, the network device may perform channel estimation based on a reference signal received from the terminal device to obtain latency information, and carry the latency information in signaling to notify the terminal device. The signaling carrying the latency information may be higher-layer signaling, such as radio resource control (RRC) signaling.

[0183] The first index may be an index of a delay interval and may come from a network device.

[0184] In the case where the first information includes the delay information of the terminal device, the above S301, the terminal device determines the first cyclic shift set based on the first mapping relationship and the first information, which may include: the terminal device determines the cyclic shift set corresponding to the delay interval in which the delay in the delay information of the terminal device is located as the first cyclic shift set.

[0185] In this way, the delay of the terminal device can be matched with the first cyclic shift set to take both delay and interference into consideration.

[0186] Taking the mapping relationship shown in Table 1 above as an example, if the delay of the terminal device t delay Located in the delay interval [T max / 3,2T max / 3), the first cyclic shift set is the cyclic shift set P1.

[0187] When the first information includes a first index, the method shown in FIG3 may further include: the terminal device receiving the first information from the network device. The first information includes the first index. In S301 above, the terminal device determining the first cyclic shift set based on the first mapping relationship and the first information may include: the terminal device determining the first cyclic shift set based on the first index and the first mapping relationship. The terminal device determines the cyclic shift set corresponding to the delay interval indicated by the first index as the first cyclic shift set.

[0188] In this way, the network device carries the first index indicating the delay interval in the first information, thereby reducing signaling overhead and improving communication efficiency.

[0189] Take K time delay intervals including [0,T max / 3), [T max / 3,2T max / 3), and [2T max / 3,T max ] as an example, the delay interval [0,T max / 3) corresponds to the cyclic shift set P0, the delay interval [T max / 3,2T max / 3) corresponds to the cyclic shift set P1, the delay interval [2T max / 3,T max ] corresponds to the cyclic shift set P2, the delay interval [0,T max / 3) is the interval index #0, and the delay interval [T max / 3,2T max / 3) is the interval index #1, and the delay interval [2T max / 3,T max ] is interval index #2. In this case, the correspondence between interval index, delay interval and cyclic shift set is shown in Table 2 below. If the first index is interval index #1, the first cyclic shift set is cyclic shift set P1.

[0190] Table 2

[0191] Interval Index Interval Index #0 Interval Index #1 Interval Index #2 Delay Interval [0,T max / 3)[T max / 3,2T max / 3)[2T max / 3,T max ]Cyclic shift setCyclic shift set P0Cyclic shift set P1Cyclic shift set P2

[0192] It should be noted that, in some possible embodiments, the cyclic shift may also be referred to as a cyclic shift value.

[0193] S302: The terminal device obtains a first cyclic shift of a reference signal sequence according to a first cyclic shift set.

[0194] The reference signal sequence may be any one of the following: a ZC sequence, a pseudo-random noise (PN) sequence, or a quadrature phase shift keying (QPSK) sequence generated based on a pseudo-random gold sequence.

[0195] In one possible design, the terminal device may independently determine the first cyclic shift from the first cyclic shift set.

[0196] Exemplarily, the terminal device may randomly determine the first cyclic shift from the cyclic shifts in the first cyclic shift set. At this time, the terminal device may send the first cyclic shift to the network device, for example, the first cyclic shift may be carried in data sent by the terminal device.

[0197] For example, the first cyclic shift set (P1) is the first cyclic shift set, and the first cyclic shift set includes 3 cyclic shifts. The 0th cyclic shift of the first cyclic shift set is The first cyclic shift of the first cyclic shift set is The second cyclic shift of the first cyclic shift set is Right now The terminal device can Determine as the first cyclic shift, or Determine as a cyclic shift, or Determined to be a cyclic shift.

[0198] In one possible design, the terminal device may receive a second index from the network device and determine the first cyclic shift from the first cyclic shift set based on the second index, where the second index is a cyclic shift index of the first cyclic shift.

[0199] The second index may be carried in signaling, such as downlink control indicator (DCI). Thus, the cyclic shift may be indicated by the network device, which may flexibly configure the cyclic shift based on system requirements to avoid or reduce the probability of collisions between reference signals transmitted by different terminal devices.

[0200] For example, the correspondence between the cyclic shifts in the first cyclic shift set and the indexes of the cyclic shifts in the first cyclic shift set is shown in Table 3 below. The cyclic shift index of is cyclic shift index #0, The cyclic shift index of is cyclic shift index #1, The cyclic shift index of is cyclic shift index #2. If the second index is cyclic shift index #1, then the first cyclic shift is

[0201] Table 3

[0202]

[0203] S303: The terminal device sends a reference signal sequence to the network device according to the first cyclic shift. Correspondingly, the network device receives the reference signal sequence from the terminal device.

[0204] Exemplarily, the terminal device may generate a reference signal sequence according to the first cyclic shift, and send the reference signal sequence to the network device.

[0205] The terminal device can determine the first cyclic shift set based on the first mapping relationship and the first information, obtain the first cyclic shift of the reference signal sequence based on the first cyclic shift set, and then send the reference signal sequence according to the first cyclic shift.

[0206] In this way, a cyclic shift set can be determined for each delay interval according to the upper limit of each delay interval, thereby increasing the total number of cyclic shifts and improving the capacity of the communication system.

[0207] S304: The network device obtains interval information.

[0208] The interval information is used to indicate the delay interval that the terminal device's delay is in. Exemplarily, the interval information may include the terminal device's delay.

[0209] Exemplarily, the delay of the terminal device may be one of the following: the multipath delay of the terminal device, the root mean square delay of the terminal device, the average delay of the terminal device, the time window of the terminal device, or the duration of the cyclic prefix of the symbol.

[0210] Exemplarily, the time delay of the terminal device may be a multipath time delay of the terminal device. Further, the multipath time delay of the terminal device may be a maximum multipath time delay.

[0211] S305: The network device determines a first cyclic shift set according to the interval information and the first mapping relationship.

[0212] The implementation principle of S305 can refer to the principle of S301 and will not be repeated here.

[0213] S306: The network device demodulates the reference signal sequence according to the first cyclic shift set.

[0214] In the embodiment of the present application, the first mapping relationship may be configured by a network device or specified by a protocol.

[0215] In some scenarios, the first mapping relationship on the terminal device is configured by a network device. In this case, before S301, the reference signal transmission method shown in Figure 3 above may further include: the network device sends mapping relationship indication information. Accordingly, the terminal device receives mapping relationship indication information from the network device. The mapping relationship indication information is used to indicate the first mapping relationship. Optionally, if no mapping relationship exists on the terminal device, the mapping relationship indication information may carry the first mapping relationship. For example, when multiple mapping relationships are configured in the terminal device, the network device may indicate the first mapping relationship from multiple mapping relationships, thereby improving flexibility.

[0216] Alternatively, optionally, when multiple mapping relationships are configured on the terminal device, or when multiple mapping relationships are agreed upon by the protocol, the mapping relationship indication information is used to indicate the first mapping relationship among the multiple mapping relationships configured on the terminal device. Exemplarily, the mapping relationship indication information may include identification information of the first mapping relationship. For example, the multiple mapping relationships configured on the terminal device include mapping relationships 0 to mapping relationships 5. If the mapping relationship indication information carries identification information of mapping relationship 3, mapping relationship 3 is the first mapping relationship. In this way, when multiple mapping relationships are configured in the terminal device, the network device can indicate the first mapping relationship from the multiple mapping relationships, thereby improving flexibility.

[0217] The reference signal transmission method shown in FIG3 may further include: the network device sending second information to the terminal device. Correspondingly, the terminal device receives the second information from the network device. The second information is used to indicate the maximum delay.

[0218] It is understandable that the second information can be carried in RRC signaling.

[0219] For example, if multiple mapping relationships (mapping relationship 0 to mapping relationship 2) are configured on the terminal device, and the intervals of the multiple mapping relationships are determined by T max Indicates that the delay interval in mapping relationship 0 includes: [0,T max / 3), [T max / 3,2T max / 3), [2T max / 3,T max ]; The delay intervals in mapping relationship 1 include: [0,T max / 4), [T max / 4,2T max / 3), [2T max / 3,T max ); The delay interval in mapping relationship 2 includes: [0,T max / 3), [T max / 3,T max / 2), [T max / 2,T max ]. In this case, the number of cyclic shift sets is also 3. In this case, if the terminal device receives the second indication information from the network device, mapping relationships 0 to 2 can be determined.

[0220] In this way, the maximum delay can be indicated by the network device, and the terminal device can determine the first mapping relationship based on the maximum delay, which can improve flexibility.

[0221] To facilitate understanding, the first mapping relationship in the embodiment of the present application is further illustrated below with examples.

[0222] The kth cyclic shift set in the K cyclic shift sets of the first mapping relationship can be expressed as P k , the kth cyclic shift set contains elements, each element is a cyclic shift, that is, the number of cyclic shifts in the kth cyclic shift set is The i-th element in the k-th cyclic shift set (i.e., the i-th cyclic shift) is expressed as For the kth cyclic shift set, the value of i ranges from 0 to Then the kth cyclic shift set P k It can be expressed as:

[0223] Optionally, the number of cyclic shifts in the kth cyclic shift set is The maximum value of the kth delay interval For example, the number of cyclic shifts in the cyclic shift set in the first mapping relationship may satisfy the relationship shown in the following formula (1):

[0224]

[0225] in, is the maximum value (upper limit) of the kth delay interval, N cs,base is the number of basic cyclic shifts, N cs,base According to the maximum delay T max Exemplarily, the number of basic cyclic shifts may satisfy the relationship shown in the following formula (2):

[0226] N cs,base T max ≤T symb ; (2)

[0227] For example, N cs,base It can be the maximum value of a positive integer that satisfies formula (2).

[0228] For example, it is assumed that the maximum value of the kth delay interval satisfies the relationship shown in the following formula (3):

[0229]

[0230] Then formula (3) can be transformed into the following formula (4):

[0231]

[0232] Assume K = 3, N cs,base =6, then the number of cyclic shifts in the K cyclic shift sets satisfies the relationship shown in the following formula (5):

[0233]

[0234] Solving formula (5) can yield a variety of possible values ​​for the number of cyclic shifts, for example: or

[0235] Alternatively, optionally, the number of cyclic shifts in the cyclic shift set in the first mapping relationship satisfies the relationship shown in the following formula (6):

[0236]

[0237] Among them, T symb is the duration of the symbol.

[0238] It can be understood that the length (or duration) of the CS region corresponding to a cyclic shift in the kth cyclic shift set is the maximum value of the kth delay interval. Related, for example, the length of the CS area is related to The number of cyclic shifts in the kth cyclic shift set is but The corresponding cyclic shift The total length of the CS region is The total length of the CS region corresponding to the cyclic shifts in all cyclic shift sets should not exceed the symbol duration T symb or N cs,base T max For example, in formula (6), the left side of the equation is the total length of the CS region corresponding to the cyclic shift in all cyclic shift sets, which does not exceed the symbol duration T symb .

[0239] In one possible design, the minimum distance between any two cyclic shifts in the kth cyclic shift set and the maximum value of the kth delay interval are Related.

[0240] For example, the maximum value of the kth delay interval is The larger the value is, the larger the distance between any two cyclic shifts in the kth cyclic shift set is, that is, the maximum value of the distance between any two cyclic shifts in the kth cyclic shift set and the kth delay interval is. The distance between any two cyclic shifts in the kth cyclic shift set may be the absolute value of the difference between the two cyclic shifts.

[0241] Optionally, the kth cyclic shift set P kIn this way, when the distance between two adjacent cyclic shifts is minimized, the number of cyclic shifts can be increased to further improve the capacity.

[0242] When the kth cyclic shift set P k The distance between two adjacent cyclic shifts is the same, and the minimum value of the distance between any two cyclic shifts is also the distance between two adjacent cyclic shifts.

[0243] In one possible design, the kth cyclic shift set P k The cyclic shifts in the can be arranged in order of size, such as from small to large or from large to small. For ease of understanding, the subsequent description uses the kth cyclic shift set P k The elements in are arranged in order of size, and Provide explanation.

[0244] Optionally, the i-th cyclic shift in the k-th cyclic shift set The index of the i-th circular shift can be and Determine. For example, the i-th cyclic shift in the k-th cyclic shift set The relationship shown in the following formula (7) or formula (8) can be satisfied:

[0245]

[0246]

[0247] Here, mod represents the modulo operation. is the total number of cyclic shifts in the kth delay interval, and is a positive integer, It can be predefined or notified to the terminal device by the network device through signaling, such as radio resource control (RRC) signaling. Parameters corresponding to different cyclic shift sets The values ​​of can be the same, in this case, the parameters It can be expressed as N cs,step ,Right now is the index of the kth cyclic shift. The implementation principle can be referred to the following introduction to the index of the cyclic shift, which will not be repeated here.

[0248] The network device may notify the terminal device via RRC signaling.

[0249] The kth cyclic shift set P can be kThe elements (cyclic shifts) in the kth cyclic shift set P are arranged in order of size, for example, from small to large, or from large to small. k The distance between two adjacent cyclic shifts in the cyclic shift set can be the same, that is, the distance between two adjacent cyclic shifts in the same cyclic shift set satisfies the relationship shown in the following formula (9):

[0250]

[0251] From formula (9), it can be seen that two adjacent cyclic shifts in the same cyclic shift set also satisfy the relationship shown in the following formula (10):

[0252]

[0253] At this time, the distance between two adjacent cyclic shifts can be designed to be as small as possible, thereby increasing the number of cyclic shifts.

[0254] The minimum distance between any two cyclic shifts in the kth cyclic shift set and the maximum value of the kth delay interval Related, that is The value of Related.

[0255] Furthermore, in the kth cyclic shift set P k When the cyclic shifts in are arranged in order of size, assuming that the kth cyclic shift set P k The distance between two adjacent cyclic shifts is the same, then the kth cyclic shift set P k The distance between two adjacent cyclic shifts in can satisfy one or more of the following relationships in formulas (11) to (16):

[0256]

[0257]

[0258]

[0259]

[0260]

[0261]

[0262] Among them, || means taking the absolute value, Indicates rounding up, and round() indicates rounding up.

[0263] It should be noted that in the first mapping relationship, the cyclic shift can also be represented by a cyclic shift index. Among them, in the kth cyclic shift set of the K cyclic shift sets in the first mapping relationship, the indexes of all cyclic shifts can also be called a cyclic shift index set n. k , the index of the i-th element (i.e., the i-th cyclic shift) in the k-th cyclic shift set is expressed as The kth cyclic shift index set n k It can be expressed as: in, is the i-th cyclic shift index in the k-th cyclic shift set.

[0264] It can be understood that, since the K delay intervals correspond one-to-one with the K cyclic shift sets, it can be known that the K delay intervals correspond one-to-one with the cyclic shift index sets of the K cyclic shift sets.

[0265] In one possible design, the cyclic shift index set n of the kth cyclic shift set is k The minimum distance between any two cyclic shift indices and the maximum value of the kth delay interval Related.

[0266] In one possible design, the cyclic shift index value set n of the kth cyclic shift set is k The elements can be arranged in order of size, for example, from small to large or from large to small.

[0267] Circular shift index set n k The distance between two adjacent cyclic shift indices in the cyclic shift index set n can be the same, that is, k The relationship between two adjacent cyclic shift indices in satisfies the relationship shown in formula (17):

[0268]

[0269] When the cyclic shift index set n k When the distances between two adjacent cyclic shift indices in are the same, the cyclic shift indices satisfy the following relationship as shown in formula (18):

[0270]

[0271] Among them, v k is the step size, Δ k is the offset, and v k , Δ k All are integers, v k , Δ k It can be predefined or notified to the terminal device by the network device through signaling, such as v k , Δk The network device can notify the terminal device through RRC signaling. k The value of can also be the maximum value of the kth delay interval and / or maximum delay T max According to formula (17) and formula (18), we can know the step length v k The relationship shown in the following formula (19) is satisfied:

[0272]

[0273] That is, v k The absolute value of the circular shift index set n k The distance between two adjacent cyclic shift indices in . For example, v k and the maximum value of the kth delay interval and / or maximum delay T max The relationship can be determined by any one of the following formulas (20) to (25).

[0274] Furthermore, in the cyclic shift index value set n of the kth cyclic shift set k If the elements can be arranged in order of size, assuming that the circular shift index set n k The distance between the indexes of two adjacent cyclic shifts is the same, then the cyclic shift index set n of the kth cyclic shift set is k The distance between the indices of two adjacent cyclic shifts in may satisfy one or more of the following relationships in formulas (20) to (25):

[0275]

[0276]

[0277]

[0278]

[0279]

[0280]

[0281] For example, In this case, the above formulas (20) to (25) are Can be replaced by N cs,step Understandable, v k The value of can be determined based on any one of the formulas (20) to (25).

[0282] In addition, in the step size v k When formula (18) is satisfied, the cyclic shift The relationship shown in the following formula (26) or formula (27) can be satisfied:

[0283]

[0284]

[0285] The first mapping relationship is described below with reference to different examples.

[0286] Example 1: Assume that the number of cyclic shift sets K = 3 and the number of basic cyclic shifts N cs,base =6. The corresponding relationship between the K delay intervals and the K cyclic shift sets is shown in Table 4:

[0287] Table 4

[0288] The kth cyclic shift set P of the sequence number k delay interval k 0[0,T max / 3){0,1 / 18,2 / 18,3 / 18,4 / 18,5 / 18}*2π1[T max / 3,2T max / 3){6 / 18,8 / 18,10 / 18}*2π2[2T max / 3,T max ]{12 / 18,15 / 18}*2π

[0289] Example 2: Assume that the number of cyclic shift sets K = 3 and the number of basic cyclic shifts N cs,base =6. Taking the cyclic shift index representation as an example, the cyclic shift index sets of K delay intervals and K cyclic shift sets are: The corresponding relationship between them is shown in Table 5:

[0290] Table 5

[0291]

[0292] As shown in Table 5, the number of cyclic shifts in the 0th, 1st and 2nd cyclic shift sets are 6, 3 and 2 respectively; the distance between two adjacent cyclic shift index values ​​in each cyclic shift set is the same. For example, due to It can be calculated that the distance between the indexes of two adjacent cyclic shifts in the 0th cyclic shift set is 1, the distance between the indexes of two adjacent cyclic shifts in the 1st cyclic shift set is 2, and the distance between the indexes of two adjacent cyclic shifts in the 2nd cyclic shift set is 3. by When expressed, it can be known from Table 5 that v0=1, v1=2, v2=3; Δ0=0, Δ1=6, Δ2=12.

[0293] As shown in Table 5, in the cyclic shift, since the maximum value of the 0th delay interval is T max / 3, the maximum value of the first delay interval is 2T max / 3, the maximum values ​​of the 0th delay interval and the 1st delay interval are both less than the maximum delay T max Therefore, the distance between the indexes of two adjacent cyclic shifts in the 0th and 1st can be smaller, and more cyclic shifts can be used, thereby increasing the total number of cyclic shifts and the number of reference signals.

[0294] Example 3: Assume that the number of cyclic shift sets K = 3 and the number of basic cyclic shifts N cs,base =6. Taking the cyclic shift index representation as an example, the cyclic shift index sets of K delay intervals, K cyclic shift sets, The corresponding relationship is shown in Table 6:

[0295] Table 6

[0296]

[0297] The K delay intervals in Tables 4 to 6 are intervals [0, T max ] is evenly divided, it can be understood that the K delay intervals can also be obtained by the interval [0,T max ] is obtained by non-uniform partitioning.

[0298] Example 4: Assume that the number of cyclic shift sets K = 3 and the number of basic cyclic shifts N cs,base =6. Taking the cyclic shift index representation as an example, the corresponding relationship between the K delay intervals and the cyclic shift index sets of the K cyclic shift sets is shown in Table 7:

[0299] Table 7

[0300]

[0301]

[0302] Optional, when sequence number k=1 in Table 7, parameter It can be 18, and the corresponding cyclic shift index set is {6, 7.5, 9, 10.5}.

[0303] Example 5: Assume that the number of cyclic shift sets K = 3 and the number of basic cyclic shifts N cs,base=6. Taking the representation of cyclic shift using cyclic shift index as an example, the corresponding relationship between K delay intervals and cyclic shift index sets of K cyclic shift sets is shown in Table 8:

[0304] Table 8

[0305]

[0306] Optional, when sequence number k=1 in Table 8, It can be 18, and the corresponding cyclic shift index set is {3, 4.5, 6, 7.5}.

[0307] Example 6: Assume that the number of cyclic shift sets K = 2 and the number of basic cyclic shifts N cs,base =6. Taking the cyclic shift index representation as an example, the corresponding relationship between the K delay intervals and the cyclic shift index sets of the K cyclic shift sets is shown in Table 9:

[0308] Table 9

[0309]

[0310] Optional, when sequence number k=1 in Table 9, parameter It can be 6, and the corresponding cyclic shift index set is {3, 4, 5}.

[0311] Example 7: Assume that the number of cyclic shift sets K = 2 and the number of basic cyclic shifts N cs,base =6. Taking the cyclic shift index representation as an example, the corresponding relationship between the K delay intervals and the cyclic shift index sets of the K cyclic shift sets is shown in Table 10:

[0312] Table 10

[0313]

[0314] Optional, when sequence number k=1 in Table 10, parameter It can be 6, and the corresponding cyclic shift index set is {2, 3, 4, 5}.

[0315] Example 8: Assume that the number of cyclic shift sets K = 4 and the number of basic cyclic shifts N cs,base =6. Taking the cyclic shift index representation as an example, the correspondence between the K delay intervals and the cyclic shift index sets of the K cyclic shift sets is shown in Table 11:

[0316] Table 11

[0317]

[0318] FIG4 shows a schematic diagram of the correspondence between the K delay intervals in Tables 5 to 8 and the cyclic shift index sets of the K cyclic shift sets based on the multipath delay and the symbol duration.

[0319] In some embodiments, the number of cyclic shifts determined based on the maximum delay in FIG4 (a) is 6 (ie, the number of basic cyclic shifts N can be considered as cs,base =6), the time domain channel estimated by the network device can be divided into 6 CS regions, and the 6 CS regions correspond to 6 cyclic shifts one by one. The length of each CS region is greater than or equal to the maximum delay. As shown in (a) of Figure 4, the length of each CS region can be the maximum delay.

[0320] Figure 4(b) is a schematic diagram showing the correspondence between K=3 delay intervals and the cyclic shift index sets of K cyclic shift sets shown in Table 5 and Table 6. The maximum value of the three delay intervals in Table 5 and Table 6 is Therefore, as shown in FIG4 (b), the length of the CS region corresponding to the 0th cyclic shift set is T max / 3, the length of the CS region corresponding to the first cyclic shift set is T max / 3, the length of the CS region corresponding to the second cyclic shift set is T max . Take the CS region length as T max By dividing the time domain channel by 1 / 3, 18 CS regions can be obtained, corresponding to cyclic shift indices 0 to 17. As shown in (b) of Figure 4, the cyclic shift value set of the 0th cyclic shift set in Table 5 or Table 6 is {0, 1, 2, 3, 4, 5}, corresponding to CS regions 0 to 5. The cyclic shift index set of the first cyclic shift set is {6, 8, 10}, corresponding to CS regions 6 to 8. The cyclic shift index set of the second cyclic shift set is {12, 15}, corresponding to CS regions 9 to 15. Since the CS region length corresponding to a cyclic shift in the first cyclic shift set is 2T max / 3, so one cyclic shift in the first cyclic shift set will correspond to two cyclic shifts of length T max / 3 CS area. Since the CS area length corresponding to a cyclic shift in the second cyclic shift set is T max , so one cyclic shift in the second cyclic shift set will correspond to three cyclic shifts of length T max / 3 of CS area.

[0321] Similarly, (c) in FIG. 4 is a schematic diagram of the correspondence between the K = 3 delay intervals shown in Table 6 and the cyclic shift index set of the K cyclic shift sets. (d) in FIG. 4 is a schematic diagram of the correspondence between the K = 3 delay intervals shown in Table 7 and the cyclic shift index set of the K cyclic shift sets. (e) in FIG. 4 is a schematic diagram of the correspondence between the K = 3 delay intervals shown in Table 8 and the cyclic shift index set of the K cyclic shift sets.

[0322] Combining the above FIG. 4 and Tables 4 to 8, it can be seen that the solution provided by the embodiment of the present application, compared with the solution that only determines the cyclic shift set according to N cs,base and the symbol duration, can increase the number of cyclic shifts, thereby achieving the effect of improving the capacity of the communication system.

[0323] In addition, it should be noted that in the scenario where the terminal device uses unauthorized transmission, the solution of the embodiment of the present application can further reduce the collision probability between terminal devices, thereby improving the communication efficiency.

[0324] In some other embodiments, multiple cyclic shift sets can be configured on the terminal device. The network device can specify the first cyclic shift set from the multiple cyclic shift sets, and the terminal device can further determine the first cyclic shift from the first cyclic shift set, and then send the reference signal according to the first cyclic shift.

[0325] Exemplarily, FIG. 5 is a second schematic flowchart of the reference signal transmission method provided by the embodiment of the present application. This reference signal transmission method can be applied to the communication between any two nodes shown in FIG. 2.

[0326] Among them, K cyclic shift sets are configured in the terminal device. Any one of the K cyclic shift sets contains at least one cyclic shift. The K cyclic shift sets correspond one-to-one with K delay intervals, and the K delay intervals do not overlap with each other. K is a positive integer greater than 1. Any two cyclic shifts in the K cyclic shift sets are different, and the K delay intervals are determined according to the maximum delay.

[0327] In a possible design, in the k-th cyclic shift set of the K cyclic shift sets, the minimum distance between any two cyclic shifts is positively correlated with the maximum delay in the k-th delay interval, where 0 ≤ k < K and k is an integer.

[0328] In a possible design, in the k-th cyclic shift set of the K cyclic shift sets, the number of cyclic shifts is positively correlated with the maximum delay in the k-th delay interval and the symbol duration, where 0 ≤ k < K and k is an integer.

[0329] Regarding the implementation principle of the K cyclic shift sets, reference may be made to the relevant introduction in the method embodiment shown in FIG3 , which will not be repeated here.

[0330] As shown in FIG5 , the reference signal transmission method includes the following steps:

[0331] S501: The terminal device receives a third index from the network device.

[0332] The third index is the index of the cyclic shift set, that is, the cyclic shift set index.

[0333] S502: The terminal device determines a first cyclic shift set according to the third index.

[0334] For example, as shown in Table 12 below, the cyclic shift set includes cyclic shift set P0 to cyclic shift set P2. If the cyclic shift set indexes corresponding to cyclic shift set P0 to cyclic shift set P2 are cyclic shift set index #0 to cyclic shift set index #2, and the third index is cyclic shift set index #1, then cyclic shift set P1 is the first cyclic shift set.

[0335] Table 12

[0336]

[0337] S503: The terminal device determines a cyclic shift in the first cyclic shift set as a first cyclic shift.

[0338] In one possible design, the terminal device may determine the cyclic shift independently. In this case, the terminal device determining a cyclic shift in the first cyclic shift set as the first cyclic shift may include: the terminal device randomly determining a cyclic shift in the first cyclic shift set as the first cyclic shift.

[0339] In one possible design, the cyclic shift may be specified by the network device. In this case, the method shown in FIG5 may further include: the terminal device receiving a fourth index from the network device. The terminal device determining a cyclic shift in the first cyclic shift set as the first cyclic shift may include: the terminal device determining the cyclic shift in the first cyclic shift set that corresponds to the fourth index as the first cyclic shift.

[0340] The implementation principle of S503 can refer to the implementation principle of S302, which will not be repeated here.

[0341] S504: The terminal device sends a reference signal sequence to the network device according to the first cyclic shift.

[0342] The implementation principle of S504 can refer to the implementation principle of S303 and will not be repeated here.

[0343] S505: The network device obtains interval information.

[0344] The implementation principle of S505 can refer to the implementation principle of S304, which will not be repeated here.

[0345] S506: The network device determines a first cyclic shift set according to the interval information and the first mapping relationship.

[0346] The implementation principle of the first mapping relationship may refer to the introduction related to the first mapping relationship in the method shown in FIG3 , and the implementation principle of S506 may refer to the implementation principle of S305 , which will not be repeated here.

[0347] S507: The network device demodulates the reference signal sequence according to the first cyclic shift set.

[0348] The implementation principle of S507 can refer to the implementation principle of S306, which will not be repeated here.

[0349] In a possible design scheme, the method provided in the fourth aspect may also include: the network device sends a third index to the terminal device.

[0350] In a possible design solution, the method provided in the fourth aspect may further include: the network device sending group indication information. The group indication information is used to indicate K cyclic shift sets.

[0351] In addition, the technical effects of the reference signal transmission method provided in FIG5 can refer to the technical effects of the reference signal transmission method shown in FIG3 , and will not be repeated here.

[0352] The reference signal transmission method provided in the embodiment of the present application is described in detail above with reference to Figures 3 to 5. The communication device for executing the reference signal transmission method provided in the embodiment of the present application is described in detail below with reference to Figures 6 to 7.

[0353] For example, Figure 6 is a structural diagram of a communication device 600 provided in an embodiment of the present application. As shown in Figure 6, the communication device 600 includes a processing module 601 and a transceiver module 602. For ease of illustration, Figure 6 only shows the main components of the communication device 600.

[0354] In some embodiments, the communication apparatus 600 may be applicable to the communication system shown in FIG. 2 , and perform the functions of the terminal device in the reference signal transmission method shown in FIG. 3 .

[0355] The processing module 601 is configured to determine a first cyclic shift set according to a first mapping relationship and first information.

[0356] The first mapping relationship includes the correspondence between K delay intervals and K cyclic shift sets. The K delay intervals do not overlap with each other, and there is a one-to-one correspondence between the K delay intervals and the K cyclic shift sets. K is a positive integer greater than 1. Any one of the K cyclic shift sets contains at least one cyclic shift, and any two cyclic shifts in the K cyclic shift sets are different. The K delay intervals are determined according to the maximum delay.

[0357] The processing module 601 is further configured to obtain the first cyclic shift of the reference signal sequence according to the first cyclic shift set.

[0358] The transceiver module 602 is configured to transmit the reference signal sequence according to the first cyclic shift.

[0359] In a possible design, the first information may include the delay information of the terminal device. Specifically, the processing module 601 may be configured to determine the first cyclic shift set according to the first mapping relationship and the delay information of the terminal device.

[0360] In a possible design, the transceiver module 602 may further be configured to receive the first information from the network device. The first information includes a first index. Specifically, the processing module 601 may be configured to determine the first cyclic shift set according to the first index and the first mapping relationship.

[0361] In a possible design, specifically, the processing module 601 may be configured to receive a second index through the transceiver module 602. And determine the first cyclic shift from the first cyclic shift set according to the second index.

[0362] In a possible design, the maximum delay may be the maximum multipath delay.

[0363] Optionally, the delay interval may be a multipath delay interval.

[0364] In a possible design, in the k-th cyclic shift set of the K cyclic shift sets, the minimum distance between any two cyclic shifts may be positively correlated with the maximum delay in the k-th delay interval, where 0 ≤ k < K and k is an integer.

[0365] In a possible design, in the k-th cyclic shift set of the K cyclic shift sets, the number of cyclic shifts may be positively correlated with the maximum delay in the k-th delay interval and the symbol duration, where 0 ≤ k < K and k is an integer.

[0366] In a possible design, the transceiver module 602 may further be configured to receive mapping relationship indication information from the network device. The mapping relationship indication information is used to indicate the first mapping relationship.

[0367] In a possible design solution, the transceiver module 602 may also be configured to receive second information from the network device, where the second information is used to indicate the maximum delay.

[0368] Optionally, the transceiver module 602 may include a receiving module and a sending module, wherein the transceiver module 602 is used to implement the sending function and the receiving function of the communication device 600 .

[0369] Optionally, the communication device 600 may further include a storage module (not shown in FIG6 ) storing a program or instruction. When the processing module 601 executes the program or instruction, the communication device 600 may perform the functions of the terminal device in the reference signal transmission method shown in FIG2 .

[0370] It should be understood that the processing module 601 involved in the communication device 600 can be implemented by a processor or a processor-related circuit component, which can be a processor or a processing unit; the transceiver module 602 can be implemented by a transceiver or a transceiver-related circuit component, which can be a transceiver or a transceiver unit.

[0371] It should be noted that the communication device 600 can be the terminal device shown in Figure 2, or it can be a chip (system) or other parts or components set in the above-mentioned terminal device, or a device including the terminal device. The embodiment of the present application does not limit this.

[0372] In addition, the technical effects of the communication device 600 can refer to the technical effects of the reference signal transmission method shown in FIG3 , and will not be described in detail here.

[0373] In some other embodiments, the communication apparatus 600 may be applicable to the communication system shown in FIG. 2 , and perform the function of the network device in the reference signal transmission method shown in FIG. 3 .

[0374] The processing module 601 is used to obtain interval information.

[0375] The processing module 601 is further configured to determine a first cyclic shift set according to the interval information and the first mapping relationship.

[0376] The first mapping relationship includes a correspondence between K delay intervals and K cyclic shift sets. There is a one-to-one correspondence between the K delay intervals and the K cyclic shift sets, and the K delay intervals do not overlap. K is a positive integer greater than 1. Each of the K cyclic shift sets contains at least one cyclic shift. Any two cyclic shifts in the K cyclic shift sets are different. The K delay intervals are determined based on the maximum delay.

[0377] The transceiver module 602 is configured to receive a reference signal sequence. The processing module 601 is further configured to demodulate the reference signal sequence according to the first cyclic shift set.

[0378] In a possible design solution, the interval information may include the delay information of the terminal device.

[0379] In a possible design solution, the transceiver module 602 may also be used to send the first information. The first information includes a first index.

[0380] In a possible design solution, the transceiver module 602 may also be used to send a second index.

[0381] In a possible design solution, the maximum delay may be the maximum multipath delay.

[0382] In a possible design solution, the delay interval may be a multipath delay interval.

[0383] In a possible design solution, in the k-th cyclic shift set of the K cyclic shift sets, the minimum distance between any two cyclic shifts may be positively correlated with the maximum delay in the k-th delay interval, where 0 ≤ k < K and k is an integer.

[0384] In a possible design solution, in the k-th cyclic shift set of the K cyclic shift sets, the number of cyclic shifts may be positively correlated with the maximum delay in the k-th delay interval and the symbol duration, where 0 ≤ k < K and k is an integer.

[0385] In a possible design solution, the transceiver module 602 may also be used to send mapping relation indication information, where the mapping relation indication information is used to indicate a first mapping relation.

[0386] In a possible design solution, the transceiver module 602 may also be used to send second information, where the second information is used to indicate the maximum delay.

[0387] Optionally, the transceiver module 602 may include a receiving module and a sending module. Among them, the transceiver module 602 is used to implement the sending function and receiving function of the communication device 600.

[0388] Optionally, the communication device 600 may further include a storage module (not shown in FIG. 6), and the storage module stores programs or instructions. When the processing module 601 executes the programs or instructions, the communication device 600 can execute the functions of the network device in the reference signal transmission method shown in FIG. 3.

[0389] It should be understood that the processing module 涉及的601 in the communication device 600 may be implemented by a processor or processor-related circuit components, and may be a processor or a processing unit; the transceiver module 602 may be implemented by a transceiver or transceiver-related circuit components, and may be a transceiver or a transceiver unit.

[0390] Note that the communication device 600 may be the network device shown in FIG. 2, or a chip (system) or other component or assembly provided in the above network device, or a device including the network device. The embodiments of the present application do not limit this.

[0391] In addition, for the technical effects of the communication device 600, reference may be made to the technical effects of the reference signal transmission method shown in FIG. 3 respectively, which will not be elaborated here.

[0392] In some other embodiments, the communication device 600 may be applicable to the communication system shown in FIG. 2 and perform the functions of the terminal device in the reference signal transmission method shown in FIG. 5.

[0393] Among them, the communication device 600 is configured with K cyclic shift sets. Any one of the K cyclic shift sets contains at least one cyclic shift. The K cyclic shift sets correspond to K time delay intervals one by one, and the K time delay intervals do not overlap with each other. K is a positive integer greater than 1. Any two cyclic shifts in the K cyclic shift sets are different, and the K time delay intervals are determined according to the maximum time delay.

[0394] Among them, the transceiver module 602 is used to receive a third index from the network device.

[0395] The processing module 601 is used to determine a first cyclic shift set according to the third index, and determine a cyclic shift in the first cyclic shift set as the first cyclic shift.

[0396] In a possible design, the processing module 601 is specifically used to randomly determine a cyclic shift in the first cyclic shift set as the first cyclic shift.

[0397] In a possible design, the transceiver module 602 is further used to receive a second index from the network device. The processing module 601 is specifically used for the terminal device to determine the cyclic shift corresponding to the second index in the first cyclic shift set as the first cyclic shift.

[0398] In a possible design, in the k-th cyclic shift set of the K cyclic shift sets, the minimum distance between any two cyclic shifts is positively correlated with the maximum time delay in the k-th time delay interval, where 0 ≤ k < K and k is an integer.

[0399] In a possible design, in the k-th cyclic shift set of the K cyclic shift sets, the number of cyclic shifts is positively correlated with the maximum time delay in the k-th time delay interval and the symbol duration, where 0 ≤ k < K and k is an integer.

[0400] In a possible design, the transceiver module 602 is further configured to receive group indication information from a network device, where the group indication information is used to indicate K cyclic shift sets.

[0401] Optionally, the transceiver module 602 may include a receiving module and a sending module, wherein the transceiver module 602 is used to implement the sending function and the receiving function of the communication device 600 .

[0402] Optionally, the communication device 600 may further include a storage module (not shown in FIG6 ) storing a program or instruction. When the processing module 601 executes the program or instruction, the communication device 600 may perform the functions of the terminal device in the reference signal transmission method shown in FIG5 .

[0403] It should be understood that the processing module 601 involved in the communication device 600 can be implemented by a processor or a processor-related circuit component, which can be a processor or a processing unit; the transceiver module 602 can be implemented by a transceiver or a transceiver-related circuit component, which can be a transceiver or a transceiver unit.

[0404] It should be noted that the communication device 600 can be the terminal device shown in Figure 2, or it can be a chip (system) or other parts or components set in the above-mentioned terminal device, or a device including the terminal device. The embodiment of the present application does not limit this.

[0405] In addition, the technical effects of the communication device 600 can refer to the technical effects of the reference signal transmission method shown in FIG5 , and will not be described in detail here.

[0406] In some further embodiments, the communication apparatus 600 may be applicable to the communication system shown in FIG. 2 , and perform the function of the network device in the reference signal transmission method shown in FIG. 5 .

[0407] The transceiver module 602 is used to obtain interval information.

[0408] The processing module 601 is configured to determine a first cyclic shift set according to the interval information and a first mapping relationship.

[0409] The transceiver module 602 is further configured to receive a reference signal sequence. The processing module 601 is further configured to demodulate the reference signal sequence according to the first cyclic shift set.

[0410] The first mapping relationship includes a correspondence between K delay intervals and K cyclic shift sets; the K delay intervals and the K cyclic shift sets have a one-to-one correspondence, and the K delay intervals do not overlap; K is a positive integer greater than 1, any cyclic shift set in the K cyclic shift sets contains at least one cyclic shift, any two cyclic shifts in the K cyclic shift sets are different, and the K delay intervals are determined based on the maximum delay.

[0411] In a possible design, the transceiver module 602 is further configured to send a third index.

[0412] In a possible design, in the k-th cyclic shift set of the K cyclic shift sets, the minimum distance between any two cyclic shifts is positively correlated with the maximum time delay in the k-th time delay interval, where 0 ≤ k < K and k is an integer.

[0413] In a possible design, in the k-th cyclic shift set of the K cyclic shift sets, the number of cyclic shifts is positively correlated with the maximum time delay in the k-th time delay interval and the symbol duration, where 0 ≤ k < K and k is an integer.

[0414] In a possible design, the transceiver module 602 is further configured to send group indication information. The group indication information is used to indicate the K cyclic shift sets.

[0415] Optionally, the transceiver module 602 may include a receiving module and a sending module. The transceiver module 602 is configured to implement the sending function and the receiving function of the communication device 600.

[0416] Optionally, the communication device 600 may further include a storage module (not shown in FIG. 6), and the storage module stores programs or instructions. When the processing module 601 executes the programs or instructions, the communication device 600 can execute the functions of the network device in the reference signal transmission method shown in FIG. 5.

[0417] It should be understood that the processing module 601 involved in the communication device 600 may be implemented by a processor or a processor-related circuit component, and may be a processor or a processing unit; the transceiver module 602 may be implemented by a transceiver or a transceiver-related circuit component, and may be a transceiver or a transceiver unit.

[0418] It should be noted that the communication device 600 may be the network device shown in FIG. 2, or a chip (system) or other component or component set in the above network device, or a device including the network device. The embodiments of the present application do not limit this.

[0419] In addition, for the technical effects of the communication device 600, reference may be made to the technical effects of the reference signal transmission method shown in FIG. 5 respectively, which will not be elaborated here.

[0420] Exemplarily, FIG. 7 is a schematic structural diagram II of a communication device provided by an embodiment of the present application. The communication device may be a terminal device or a network device, or a chip (system) or other component or component that can be set in the terminal device or the network device. As shown in FIG. 7, the communication device 700 may include a processor 701.

[0421] Optionally, the communication device 700 may further include a memory 702 and / or a transceiver 703. The processor 701 is coupled to the memory 702 and the transceiver 703, for example, via a communication bus.

[0422] The following is a detailed introduction to the various components of the communication device 700 with reference to FIG7 :

[0423] The processor 701 is the control center of the communication device 700 and can be a single processor or a collective term for multiple processing elements. For example, the processor 701 can be one or more central processing units (CPUs), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application, such as one or more digital signal processors (DSPs) or one or more field programmable gate arrays (FPGAs).

[0424] Optionally, the processor 701 may execute various functions of the communication device 700 by running or executing a software program stored in the memory 702 and calling data stored in the memory 702 .

[0425] In a specific implementation, as an embodiment, the processor 701 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG. 7 .

[0426] In a specific implementation, as an embodiment, the communication device 700 may also include multiple processors, such as the processor 701 and the processor 704 shown in FIG7 . Each of these processors may be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). The processor herein may refer to one or more devices, circuits, and / or processing cores for processing data (e.g., computer program instructions).

[0427] Among them, the memory 702 is used to store the software program for executing the solution of this application, and the execution is controlled by the processor 701. The specific implementation method can refer to the above method embodiment and will not be repeated here.

[0428] Alternatively, the memory 702 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, an optical disc storage (including a compact disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory 702 may be integrated with the processor 701 or exist independently and be coupled to the processor 701 via an interface circuit (not shown in FIG. 7 ) of the communication device 700. This embodiment of the present application does not specifically limit this.

[0429] Transceiver 703 is used for communication with other communication devices. For example, if communication device 700 is a terminal device, transceiver 703 can be used to communicate with a network device or another terminal device. For another example, if communication device 700 is a network device, transceiver 703 can be used to communicate with a terminal device or another network device.

[0430] Optionally, the transceiver 703 may include a receiver and a transmitter (not shown separately in FIG7 ), wherein the receiver is used to implement a receiving function, and the transmitter is used to implement a sending function.

[0431] Optionally, the transceiver 703 may be integrated with the processor 701 or exist independently and be coupled to the processor 701 through an interface circuit (not shown in FIG. 7 ) of the communication device 700 . This embodiment of the present application does not specifically limit this.

[0432] It should be noted that the structure of the communication device 700 shown in FIG7 does not constitute a limitation on the communication device. An actual communication device may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0433] In addition, the technical effects of the communication device 700 can refer to the technical effects of the reference signal transmission method described in the above method embodiment, and will not be repeated here.

[0434] It should be understood that the processor in the embodiments of the present application may be a central processing unit (CPU), and the processor may 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, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc.

[0435] It should also be understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of random access memory (RAM) are available, such as static RAM (SRAM), dynamic random access memory (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0436] The above embodiments can be implemented in whole or in part by software, hardware (such as circuits), firmware or any other combination. When implemented using software, the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (such as infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that contains one or more available media sets. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a tape), an optical medium (for example, a DVD), or a semiconductor medium. The semiconductor medium can be a solid-state drive.

[0437] It should be understood that the term "and / or" as used herein simply describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A alone, A and B together, or B alone. A and B can be singular or plural. Furthermore, the character " / " as used herein generally indicates an "or" relationship between the associated objects, but it may also indicate an "and / or" relationship. For specific understanding, please refer to the context.

[0438] In this application, "at least one" means one or more, and "plurality" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or plural.

[0439] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0440] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0441] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0442] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0443] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0444] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0445] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0446] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A reference signal transmission method, characterized in that: The method includes: Determining a first cyclic shift set according to a first mapping relationship and first information; the first mapping relationship includes a correspondence between K time delay intervals and K cyclic shift sets; the K time delay intervals do not overlap with each other, and there is a one-to-one correspondence between the K time delay intervals and the K cyclic shift sets; K is a positive integer greater than 1, any one of the K cyclic shift sets includes at least one cyclic shift, any two cyclic shifts in the K cyclic shift sets are different, and the K time delay intervals are determined according to the maximum time delay; Obtaining a first cyclic shift of a reference signal sequence according to the first cyclic shift set; Transmitting the reference signal sequence according to the first cyclic shift.

2. The method according to claim 1, characterized in that The first information includes time delay information of a terminal device; determining the first cyclic shift set according to the first mapping relationship and the first information includes: Determining the first cyclic shift set according to the first mapping relationship and the time delay information of the terminal device.

3. The method according to claim 1, characterized in that Before determining the first cyclic shift set according to the first mapping relationship and the first information, the method further includes: Receiving the first information from a network device; wherein, the first information includes a first index; Determining the first cyclic shift set according to the first mapping relationship and the first information includes: Determining the first cyclic shift set according to the first index and the first mapping relationship.

4. The method according to any one of claims 1 to 3, characterized in that Obtaining the first cyclic shift of the reference signal sequence according to the first cyclic shift set includes: Receiving a second index; Determining the first cyclic shift from the first cyclic shift set according to the second index.

5. The method according to any one of claims 1 to 4, characterized in that The maximum time delay is the maximum multipath time delay.

6. The method according to claim 5, characterized in that The time delay interval is a multipath time delay interval.

7. The method according to any one of claims 1 to 6, characterized in that In the k-th cyclic shift set of the K cyclic shift sets, the minimum distance between any two cyclic shifts is positively correlated with the maximum time delay in the k-th time delay interval, where 0 ≤ k < K and k is an integer.

8. The method according to any one of claims 1 to 7, characterized in that In the k-th cyclic shift set of the K cyclic shift sets, the number of cyclic shifts is positively correlated with the maximum time delay in the k-th time delay interval and the symbol duration, where 0 ≤ k < K and k is an integer.

9. The method according to any one of claims 1 to 8, characterized in that The method further includes: Receiving mapping relationship indication information from a network device; wherein, the mapping relationship indication information is used to indicate the first mapping relationship.

10. The method according to any one of claims 1 to 8, characterized in that The method further includes: Receiving second information from a network device; wherein, the second information is used to indicate the maximum time delay.

11. A reference signal transmission method, characterized in that: The method includes: Obtaining interval information; Determining a first cyclic shift set according to the interval information and the first mapping relationship; the first mapping relationship includes a correspondence between K time delay intervals and K cyclic shift sets; there is a one-to-one correspondence between the K time delay intervals and the K cyclic shift sets, and the K time delay intervals do not overlap with each other; K is a positive integer greater than 1, any one of the K cyclic shift sets includes at least one cyclic shift, any two cyclic shifts in the K cyclic shift sets are different, and the K time delay intervals are determined according to the maximum time delay; Receiving a reference signal sequence; Demodulating the reference signal sequence according to the first cyclic shift set.

12. The method according to claim 11, characterized in that The interval information includes the delay information of the terminal device.

13. The method according to claim 11 or 12, characterized in that Before receiving the reference signal sequence, the method further includes: Transmitting first information; the first information includes a first index.

14. The method according to any one of claims 11 to 13, characterized in that The method further includes: Transmitting a second index.

15. The method according to any one of claims 11 to 14, characterized in that The maximum delay is the maximum multipath delay.

16. The method according to any one of claims 11 to 15, characterized in that The delay interval is a multipath delay interval.

17. The method according to any one of claims 11 to 16, characterized in that In the k-th cyclic shift set of the K cyclic shift sets, the minimum distance between any two cyclic shifts is positively correlated with the maximum delay in the k-th delay interval, where 0 ≤ k < K and k is an integer.

18. The method according to any one of claims 11 to 17, characterized in that In the k-th cyclic shift set of the K cyclic shift sets, the number of cyclic shifts is positively correlated with the maximum delay in the k-th delay interval and the symbol duration, where 0 ≤ k < K and k is an integer.

19. The method according to any one of claims 11 to 18, characterized in that The method further includes: Transmitting mapping relationship indication information; the mapping relationship indication information is used to indicate the first mapping relationship.

20. The method according to any one of claims 11 to 19, characterized in that The method further includes: Transmitting second information; the second information is used to indicate the maximum delay.

21. A communication device, characterized in that: The apparatus includes: a processing module and a transceiver module; The processing module is configured to determine a first cyclic shift set according to a first mapping relationship and first information; the first mapping relationship includes a corresponding relationship between K delay intervals and K cyclic shift sets; the K delay intervals do not overlap each other, and there is a one-to-one correspondence between the K delay intervals and the K cyclic shift sets; K is a positive integer greater than 1, any cyclic shift set in the K cyclic shift sets includes at least one cyclic shift, any two cyclic shifts in the K cyclic shift sets are different, and the K delay intervals are determined according to the maximum delay; The processing module is configured to obtain a first cyclic shift of the reference signal sequence according to the first cyclic shift set. The transceiver module is configured to transmit the reference signal sequence according to the first cyclic shift.

22. The device according to claim 21, characterized in that The first information includes the delay information of the terminal device; The processing module is specifically configured to determine the first cyclic shift set according to the first mapping relationship and the delay information of the terminal device.

23. The apparatus according to claim 21, wherein The transceiver module is further configured to receive the first information from a network device; the first information includes a first index; The processing module is specifically configured to determine the first cyclic shift set according to the first index and the first mapping relationship.

24. The apparatus according to any one of claims 21-23, wherein The processing module is specifically configured to receive a second index through the transceiver module; and Determine the first cyclic shift from the first cyclic shift set according to the second index.

25. The device according to any one of claims 21 to 24, characterized in that The maximum delay is the maximum multipath delay.

26. The device according to claim 25, characterized in that The delay interval is a multipath delay interval.

27. The device according to any one of claims 21 to 26, characterized in that In the k-th cyclic shift set of the K cyclic shift sets, the minimum distance between any two cyclic shifts is positively correlated with the maximum delay in the k-th delay interval, where 0 ≤ k < K and k is an integer.

28. The device according to any one of claims 21 to 27, characterized in that In the k-th of the K cyclic shift sets, the number of cyclic shifts is positively correlated with the maximum time delay in the k-th time delay interval and the symbol duration, where 0 ≤ k < K and k is an integer.

29. The apparatus according to any one of claims 21-28, wherein the transceiver module is further configured to receive mapping relationship indication information from a network device; wherein the mapping relationship indication information is used to indicate the first mapping relationship.

30. The device according to any one of claims 21 to 29, characterized in that The apparatus further comprises: the transceiver module is further configured to receive second information from a network device; wherein the second information is used to indicate the maximum time delay.

31. A communication device, characterized in that: The apparatus comprises a processing module and a transceiver module; the processing module is configured to obtain interval information; the processing module is further configured to determine a first cyclic shift set according to the interval information and the first mapping relationship; the first mapping relationship includes a correspondence between K time delay intervals and K cyclic shift sets; there is a one-to-one correspondence between the K time delay intervals and the K cyclic shift sets, and the K time delay intervals do not overlap; K is a positive integer greater than 1, any one of the K cyclic shift sets contains at least one cyclic shift, any two cyclic shifts in the K cyclic shift sets are different, and the K time delay intervals are determined according to the maximum time delay; the transceiver module is configured to receive a reference signal sequence; the processing module is further configured to demodulate the reference signal sequence according to the first cyclic shift set.

32. The device according to claim 31, characterized in that The interval information includes the time delay information of the terminal device.

33. The apparatus according to claim 31 or 32, wherein the transceiver module is further configured to send first information; the first information includes a first index.

34. The apparatus according to any one of claims 31-33, wherein the transceiver module is further configured to send a second index.

35. A communication device, characterized in that: Comprises: a processor, the processor is coupled with a memory; the processor is configured to execute a computer program stored in the memory, so that the communication apparatus executes the reference signal transmission method according to any one of claims 1-20.

36. The device according to claim 35, characterized in that The communication apparatus further comprises a transceiver, and the transceiver is used for information interaction between the communication apparatus and other communication apparatuses.

37. A communication device, characterized in that: Comprises: a processor and an interface circuit; wherein the interface circuit is configured to receive code instructions and transmit them to the processor; the processor is configured to run the code instructions to execute the method according to any one of claims 1-20.

38. A computer-readable storage medium, characterized in that The computer-readable storage medium comprises a computer program or instruction, and when the computer program or instruction runs on a computer, the computer is caused to execute the reference signal transmission method according to any one of claims 1-20.

39. A computer program product, characterized in that The computer program product comprises: a computer program or instruction, and when the computer program or instruction runs on a computer, the computer is caused to execute the reference signal transmission method according to any one of claims 1-20.

40. A communication system, characterized in that: The communication system includes one or more terminal devices and one or more network devices; the terminal devices are used to execute the reference signal transmission method according to any one of claims 1 to 10, and the network devices are used to execute the reference signal transmission method according to any one of claims 11 to 20.

Images