WO2022267847A1

WO2022267847A1 - Sequence transmission method and apparatus

Info

Publication number: WO2022267847A1
Application number: PCT/CN2022/096625
Authority: WO
Inventors: 李俊; 李雪茹
Original assignee: 华为技术有限公司
Priority date: 2021-06-21
Filing date: 2022-06-01
Publication date: 2022-12-29

Abstract

Provided in the present application are a sequence transmission method and apparatus. In the method, a first device may map P sub-sequences that constitute a first sequence onto L symbols, wherein adjacent sub-sequences are mapped onto different symbols, and there are at least two sub-sequences mapped onto the same symbol; the subcarrier interval between any two adjacent sequence elements that constitute a sub-sequence is a first frequency domain interval; and the subcarrier interval between the last sequence element of one of two adjacent sub-sequences and the first sequence element of the other sub-sequence is also a first frequency domain interval. The subcarrier interval between any two adjacent sequence elements that constitute a first sequence is a first frequency domain interval, such that when a second device receives the first sequence, the correlation of the first sequence is not destroyed, thereby facilitating the improvement of the accuracy of a detection result of detecting a first sequence.

Description

Method and device for transmitting sequences

This application is required to be submitted to the State Intellectual Property Office on June 21, 2021, the application number is 202110684687.5, and the application name is "a communication method, terminal and network equipment", and the national intellectual property right is required to be submitted on August 20, 2021 Priority of a Chinese patent application with application number 202110961889.X and application title "Method and Apparatus for Transmission Sequence", the entire content of which is incorporated by reference in this application.

technical field

The present application relates to the field of communications, and more particularly to methods and devices for transmitting sequences in the field of communications.

Background technique

In a wireless communication system, a reference signal is usually used to implement functions such as ranging and positioning. The first device uses a sequence with good correlation to generate a reference signal and sends it to the second device. After the second device obtains the received signal of the reference signal, it uses the locally generated sequence to perform correlation calculations on the received signal, and searches for correlation peaks The transmission time delay of the reference signal is determined, so as to realize functions such as ranging or positioning of the first device.

When there is interference from other sequences in the received signal of the reference signal received by the second device, some strong interference peaks may be generated during the above correlation calculation, which will affect the detection result, thus affecting the ranging or Positioning accuracy. Generally, the longer the sequence, the less interference when performing correlation operations. Therefore, the first device can use a longer sequence to improve the ability to resist interference. In wireless communication systems such as long term evolution (long term evolution, LTE) or new radio (new radio, NR), the first device can split and map multiple sequence elements of a longer sequence to multiple OFDM Send on (orthogonal frequency division multiplexing, OFDM) symbols. However, if the sequence elements are randomly mapped to multiple OFDM symbols for transmission, the good correlation of the sequence may be destroyed, which will make the detection result inaccurate, and also affect the accuracy of the ranging or positioning of the first device by the second device sex.

Contents of the invention

The embodiment of the present application provides a method and device for transmitting a sequence, which can prevent the correlation of the sequence from being destroyed and improve the accuracy of the detection result. For example, it can improve the accuracy of the distance measurement or positioning of the first device by the second device accuracy.

In a first aspect, a method for transmitting a sequence is provided, wherein the method includes:

Generate a first sequence X(k) of length N, where k=0,1,...,N-1, where N is an integer greater than 1;

The first sequence is sent on L symbols, the first sequence includes P subsequences, each subsequence in the P subsequences includes one or more consecutive sequence elements, and the same subsequence in the P subsequences The sequence elements of the sequence are mapped on the same symbol, and the i-th subsequence and the i+1th subsequence in the P subsequences are respectively mapped to the l _i -th symbol and the l _i+1 -th symbol in the L symbols above, l _i is different from l _i+1 , there are at least two sub-sequences mapped on the same symbol in the P sub-sequences, and any adjacent sequence elements of the i-th sub-sequence are equally spaced according to the first frequency domain interval is mapped to the subcarrier included in the l _i th symbol, the subcarrier mapped to the last sequence element of the i th subsequence is mapped to the subcarrier mapped to the first sequence element of the i+1 th subsequence The interval between subcarriers is the first frequency domain interval, P is an integer greater than or equal to 3, i=0, 1, ..., P-1, and the sum of the lengths of the P subsequences is N; where, N is an integer greater than 1, L is a positive integer greater than 1, P is an integer greater than or equal to 3, and i=0, 1, ..., P-1.

In the above scheme, the method may be performed by the first device, and the first device may map the P subsequences constituting the first sequence on L symbols, and map adjacent subsequences on different symbols, and there are at least two subsequences are mapped on the same symbol, the subcarrier spacing of any two adjacent sequence elements forming a subsequence is the first frequency domain interval, and among the two adjacent subsequences, the last sequence element of one of the subsequences is the same as The subcarrier spacing of the first sequence element of the next subsequence is also the first frequency domain spacing. The subcarrier spacing of any two adjacent sequence elements that make up the first sequence is the first frequency domain spacing, so that when the second device receives the first sequence, the correlation of the first sequence will not be destroyed, which is beneficial to Improve the accuracy of the detection results of the first sequence. For example, when the second device needs to locate the first device, it can use the received signal to determine the transmission duration of the first sequence, so that the distance of the first device can be determined. The first device can also be located.

Optionally, the method may be replaced by: generating a first sequence X(k) with a length of N, where k=0, 1, . . . , N-1. The first sequence is sent on L symbols, and the first sequence includes N sequence elements, that is to say, the first sequence is mapped on L symbols, and at least one of the L symbols is mapped to two or two For the above sequence elements, the two or more sequence elements mapped on the symbol may be adjacent sequence elements or non-adjacent sequence elements. The subcarrier intervals of any two adjacent sequence elements constituting the first sequence are the same, which is the first frequency domain interval, N is a positive integer greater than 1, and L is a positive integer greater than 1.

In the above scheme, multiple sequence elements that make up the first sequence can be mapped on L symbols, and the subcarrier spacing of any two adjacent sequence elements is the first frequency domain interval, so that the first sequence can be made The correlation will not be destroyed, which is conducive to improving the accuracy of the detection results of the first sequence. For example, when the second device needs to locate the first device, it can use the received signal to determine the transmission duration of the first sequence. , so that the distance of the first device can be determined, and the first device can also be positioned.

Optionally, the first sequence is a long sequence, for example, N is greater than a preset value.

Optionally, the first sequence is a sequence corresponding to the reference signal.

Optionally, the first sequence is a sequence corresponding to the cellular reference signal. For example, the first sequence may be a sequence corresponding to DMRS, or may be a sequence corresponding to PRS, or may be a sequence corresponding to SRS.

Optionally, the first sequence is a sequence corresponding to the sidelink reference signal. For example, the first sequence is a sequence corresponding to SL DMRS, or a sequence corresponding to SL PRS, or a sequence corresponding to SL SRS.

Optionally, the first device may generate the first sequence according to a preset manner.

Optionally, N is greater than L.

Optionally, the L symbols may be L OFDM symbols.

Optionally, the L symbols represent symbols mapped with sequence elements, and if a certain symbol is not mapped with sequence elements, the symbol is not included in the L symbols.

In some possible implementation manners, the length of each subsequence in the first P-1 subsequences among the P subsequences is equal to h ₁ , and the length of the last subsequence in the P subsequences is h ₂ , h ₁ and h ₂ are the same or different, (P-1)·h ₁ +h ₂ =N, h ₁ and h ₂ are positive integers greater than or equal to 1.

In the above solution, make the sequence elements included in the subsequences mapped on each symbol equal as far as possible, that is, map the sequence elements as evenly as possible, which can simplify the design and facilitate the configuration.

In some possible implementation manners, P=N, and each subsequence in the P subsequences consists of one sequence element.

In some possible implementations, the symbol position of the X(k) mapping is l _start + pattern _L (k),

Among them, l _start is the starting position of the time domain symbol, pattern _L (k) is the symbol offset of the symbol mapped by the sequence element X(k) relative to l _start , and the value of pattern _L (k) is 0, δ, 2δ,...,(L-1)·δ, where δ is the symbol interval between two adjacent symbols mapped to different sequence elements, and δ is a positive integer greater than or equal to 1.

In the above scheme, the time-domain symbol position of each sequence element can be determined according to the pattern _L (k) of each sequence element, and the protocol can stipulate that the value of pattern _L (k) is 0, δ, 2δ, ..., (L- 1) Which specific value in δ. In this way, the N sequence elements constituting the first sequence can be mapped on the time domain according to the pattern _L (k).

Optionally, the protocol may specify l _start .

Optionally, the protocol may specify the pattern _L (k) and/or δ.

In some possible implementations, when k=0,1,2,...,L-1, pattern _L (k) takes the value of 0,δ,2δ,...,(L-1)·δ The kth element in an arrangement; when k=L, L+1,...,N-1, the value of pattern _L (k) is pattern _L (kmodL).

In the above scheme, when the value of k is less than L, each element of L sequence elements mapped on L symbols corresponds to a symbol offset, and when the value of k is greater than or equal to L less than N Next, the symbol offset corresponding to each sequence element can be obtained by performing a modulo operation according to the symbol offset when the value of k is less than L. In this way, if the second device configures the pattern _L (k) for the first device, it only needs to configure the pattern L (k) whose k value is less than L, and does not configure the pattern _L (k) whose k is greater than or equal to _L , so that Save signaling overhead. Or the protocol only needs to specify the pattern L (k) whose value of k is less than L, and does not specify the pattern _L (k) whose value of k is greater than or equal to _L , so that the design can be simplified.

Optionally, the first arrangement may be an arrangement composed of 0, δ, 2δ, . . . , (L-1)·δ in a specific order.

In some possible implementation manners, when k=0, 1, 2, . . . , L−1, pattern _L (k)=δ·k. That is to say, the first arrangement is 0, δ, 2δ, . . . , (L-1)·δ.

In some possible implementations, it is characterized in that, when k=0,1,2,...,L-1, pattern _L (k)=pattern _L ((k+q)modL)';

Among them, the value of q is 0, 1, ..., the value in L-1, pattern _L (k)' is the symbol offset of the sequence element X(k) mapping relative to l _start predefined symbol, pattern _L (k)' takes the value of the kth element in the second arrangement composed of 0, δ, 2δ, ..., (L-1)·δ.

In the above scheme, pattern _L (k) can be shifted and modulo-generated according to pattern _L (k)', so that the value of pattern _L (k) is still 0, δ, 2δ,..., (L-1 )·δ The elements in the second arrangement, that is to say, if they are predefined, the first device can generate a new pattern _L (k) according to the predefined pattern _L (k)', so that the flexibility can be improved.

Optionally, the second arrangement may be an arrangement composed of 0, δ, 2δ, . . . , (L-1)·δ in a specific order. The second arrangement can be the same as or different from the first arrangement.

In some possible implementations, the symbol position of the i-th subsequence is l' _start + pattern _L (i),

Wherein, l' _start is the start position of the time domain symbol, pattern _L (i) is the symbol offset of the symbol mapped to the i-th subsequence relative to l' _start , and the value of pattern _L (i) is 0, δ', 2δ',...,(L-1)·δ', where δ' is the symbol interval between two adjacent symbols mapped to different sequence elements, and δ' is a positive integer greater than or equal to 1.

In the above scheme, the time-domain symbol position of each subsequence can be determined according to the pattern _L (i) of each subsequence, and the protocol can stipulate that the values of pattern _L (i) are 0,δ',2δ',...,(L Which specific value in -1)·δ'. In this way, the P subsequences constituting the first sequence can be mapped on the time domain according to the pattern _L (i).

Optionally, the protocol may specify l' _start .

Optionally, the protocol may specify patterns _L (i) and/or δ'.

In some possible implementations, when i=0,1,2,...,L-1, the value of pattern _L (i) is 0,δ',2δ',...,(L-1)·δ' The i-th element in the third arrangement formed; when i=L, L+1,...,P-1, the value of pattern _L (i) is pattern _L (imodL).

In the above scheme, that is to say, when the value of i is less than L, each subsequence mapped on L symbols corresponds to a symbol offset, and the value of i is greater than or equal to L and less than P In the case of -1, the symbol offset corresponding to each subsequence can be obtained by performing a modulo operation according to the symbol offset when the value of i is less than L. In this way, if the second device configures the pattern _L (i) for the first device, it only needs to configure the pattern L (i) whose i value is less than L, and does not configure the pattern _L (i) whose i is greater than or equal to _L , so that Save signaling overhead. Or the protocol only needs to specify the pattern L (i) whose value of i is less than L, but not the pattern _L (i) whose value of i is greater than or equal to _L , so as to simplify the design.

Optionally, the third arrangement may be an arrangement composed of 0, δ', 2δ', . . . , (L-1)·δ' in a specific order.

In some possible implementation manners, when i=0, 1, 2, . . . , L−1, pattern _L (i)=i·δ′. That is to say, the third arrangement is 0, δ', 2δ', . . . , (L-1)·δ'.

In some possible implementations, when i=0,1,2,...,L-1, pattern _L (i)=pattern _L ((i+q')modL)';

Wherein, the value of q' is 0, 1, ..., the value in L-1, pattern _L (i) is the symbol offset of the symbol of the i-th subsequence relative to l' _start predefined, pattern _L (i)' is the i-th element in the fourth arrangement composed of 0, δ', 2δ', ..., (L-1)·δ'.

In the above scheme, pattern _L (i) can be shifted and modulo-generated according to pattern _L (i)', so that the value of pattern _L (i) can still be 0, δ, 2δ,..., (L-1 )·δ The elements in the second arrangement, that is to say, if they are predefined, the first device can generate a new pattern _L (i) according to the predefined pattern _L (i)', so that the flexibility can be improved.

Optionally, the fourth arrangement may be an arrangement composed of 0, δ', 2δ', . . . , (L-1)·δ' in a specific order. The fourth arrangement and the third arrangement may be the same or different.

In some possible implementation manners, the method further includes: sending configuration information, where the configuration information is used to indicate the first frequency domain interval, l _start , l' _start , L, pattern _L (k), pattern _L (i ), q, q', δ, δ', h ₁ or N at least one.

Optionally, the configuration information is configured in the first frequency domain interval, l _start , l' _start , L, pattern _L (k), pattern _L (i), q, q', δ, δ', h ₁ or N When there are at least two items, they may be configured through different configuration information or the same configuration information, which is not limited by this embodiment of the present application.

Optionally, the first device may be a network device, the second device may be a terminal device, and the network device may send configuration information to the terminal device. In the case where the first device is a network device and the second device is a terminal device, if the reference signal corresponding to the first sequence is a PRS, the network device may send configuration information to the terminal device through the positioning server.

Optionally, the first device may be a terminal device, and the second device may be a network device, and the method further includes: receiving configuration information, where the configuration information is used to indicate the first frequency domain interval, l _start , l' _start , L, At least one of pattern _L (k), pattern _L (i), q, q', δ, δ', h ₁ or N.

In a second aspect, a method for transmitting a sequence is provided, wherein the method includes:

Obtain the received signal of the reference signal on L symbols, the reference signal is generated according to the first sequence, the length of the first sequence is N, the first sequence includes P subsequences, and the first sequence includes P subsequences, each subsequence in the P subsequences includes one or more continuous sequence elements, the sequence elements of the same subsequence in the P subsequences are mapped on the same symbol, and the i-th subsequence in the P subsequences The sequence and the i+1th subsequence are respectively mapped to the l _ith symbol and the l _i+ 1th symbol in the L symbols, l _i is different from l _i+1 , and there is at least one of the P subsequences Two subsequences are mapped on the same symbol, and any adjacent sequence elements of the ith subsequence are mapped to the subcarriers included in the l _ith symbol at equal intervals in the first frequency domain, and the ith subsequence The interval between the subcarrier mapped by the last sequence element of the i subsequence and the subcarrier mapped by the first sequence element of the i+1th subsequence is the first frequency domain interval, and P is greater than or An integer equal to 3, i=0, 1, ..., P-1, the sum of the lengths of the P subsequences is N;

processing the received signal according to the first sequence;

Wherein, N is an integer greater than 1, L is a positive integer greater than 1, P is an integer greater than or equal to 3, and i=0, 1, ..., P-1.

In the above solution, the method may be executed by the second device, and the second device may process the received signal of the reference signal mapped to the first sequence. P subsequences forming the first sequence are mapped on L symbols, adjacent subsequences are mapped on different symbols, at least two subsequences are mapped on the same symbol, any two adjacent sequences forming a subsequence The subcarrier spacing of the element is the first frequency domain spacing, and in two adjacent subsequences, the subcarrier spacing between the last sequence element of one subsequence and the first sequence element of the next subsequence is also the first frequency domain interval. The subcarrier spacing of any two adjacent sequence elements that make up the first sequence is the first frequency domain spacing, so that when the second device receives the first sequence, the correlation of the first sequence will not be destroyed, which is beneficial to Improve the accuracy of the detection results of the first sequence. For example, when the second device needs to locate the first device, it can use the received signal to determine the transmission duration of the first sequence, so that the distance of the first device can be determined. The first device can also be located.

Among them, l _start is the starting position of the time domain symbol, pattern _L (k) is the symbol offset of the symbol mapped by the sequence element X(k) relative to l _start , and the value of pattern _L (k) is 0, δ, 2δ,...,(L-1)·δ, where δ is a positive integer greater than or equal to 1.

In some possible implementation manners, when k=0, 1, 2, . . . , L−1, pattern _L (k)=δ·k.

In some possible implementations, when k=0,1,2,...,L-1, pattern _L (k)=pattern _L ((k+q)modL)';

Wherein, l' _start is the start position of the time domain symbol, pattern _L (i) is the symbol offset of the symbol mapped to the i-th subsequence relative to l' _start , and the value of pattern _L (i) is 0, δ', 2δ',...,(L-1)·δ', where δ' is a positive integer greater than or equal to 1.

In some possible implementation manners, when i=0, 1, 2, . . . , L−1, pattern _L (i)=i·δ′.

In some possible implementations, the method also includes:

receiving configuration information, the configuration information is used to indicate the first frequency domain interval, l _start , l' _start , L, pattern _L (k), pattern _L (i), q, q', δ, δ', h ₁ or at least one of N.

Optionally, the first device may be a network device, the second device may be a terminal device, the network device may send configuration information to the terminal device, and the terminal device may receive the configuration information. In the case where the first device is a network device and the second device is a terminal device, if the reference signal corresponding to the first sequence is a PRS, the terminal device may receive configuration information sent by the network device through the positioning server.

Optionally, the first device may be a terminal device, and the second device may be a network device, and the method further includes: sending configuration information, where the configuration information is used to indicate the first frequency domain interval, l _start , l' _start , L, At least one of pattern _L (k), pattern _L (i), q, q', δ, δ', h ₁ or N.

Specifically, for the description of the second aspect, reference may be made to the description of the first aspect, and in order to avoid redundant description, no detailed description is given.

In a third aspect, a communication device is provided, and the communication device is configured to execute the method in any possible implementation manner of the foregoing first aspect. Specifically, the communication device may include a processing unit and a transceiver unit. The transceiver unit can communicate with the outside, and the processing unit is used for data processing. The transceiver unit may also be referred to as a communication interface or a communication unit.

The communication device may be used to perform the actions performed by the first device in any possible implementation manner of the first aspect. At this time, the communication device may be referred to as the first device, and the transceiver unit is used to perform any In a possible implementation manner, for operations related to sending and receiving on the first device side, the processing unit is configured to perform operations related to processing on the first device side in any possible implementation manner of the first aspect.

In a fourth aspect, a communication device is provided, and the communication device is configured to execute the method in any possible implementation manner of the foregoing second aspect. Specifically, the communication device may include a processing unit and a transceiver unit. The transceiver unit can communicate with the outside, and the processing unit is used for data processing. The transceiver unit may also be referred to as a communication interface or a communication unit.

The communication device may be used to perform the actions performed by the second device in any possible implementation manner of the second aspect. At this time, the communication device may be called a second device, and the transceiver unit is used to perform any of the actions in the second aspect. In a possible implementation manner, for operations related to sending and receiving on the second device side, the processing unit is configured to perform operations related to processing on the second device side in any possible implementation manner of the second aspect.

According to a fifth aspect, a communication device is provided, the communication device includes a processor and a memory, the processor is coupled to the memory, the memory is used to store computer programs or instructions, and the processor is used to execute the computer programs or instructions stored in the memory, so that the above-mentioned first The method in the aspect or in any possible implementation of the first aspect is performed.

For example, the processor is configured to execute the computer program or instruction stored in the memory, so that the communication device executes the method in the above-mentioned first aspect or any possible implementation manner of the first aspect.

Optionally, the communication device includes one or more processors.

Optionally, the communication device may further include a memory coupled to the processor.

Optionally, the communication device may include one or more memories.

Optionally, the memory can be integrated with the processor, or set separately.

Optionally, the communication device may further include a transceiver.

According to a sixth aspect, a communication device is provided, the communication device includes a processor and a memory, the processor is coupled to the memory, the memory is used to store computer programs or instructions, and the processor is used to execute the computer programs or instructions stored in the memory, so that the above-mentioned second The method in any possible implementation manner of the aspect or the second aspect is performed.

For example, the processor is configured to execute the computer program or instruction stored in the memory, so that the communication device executes the method in the above second aspect or any possible implementation manner of the second aspect.

Optionally, the communication device includes one or more processors.

Optionally, the communication device may include one or more memories.

Optionally, the memory can be integrated with the processor, or set separately.

Optionally, the communication device may further include a transceiver.

In a seventh aspect, a communication system is provided, and the communication system includes the communication device in the third aspect or any possible implementation of the third aspect and the communication device in the fourth aspect or any possible implementation of the fourth aspect or, the communication system includes the communication device in the fifth aspect or any possible implementation of the fifth aspect and at least two of the sixth aspect or any possible implementation of the sixth aspect communication device.

In an eighth aspect, a computer-readable storage medium is provided, on which is stored a computer program (also referred to as an instruction or code) for implementing the method in the first aspect or any possible implementation manner of the first aspect.

For example, when the computer program is executed by a computer, the computer can execute the method in the first aspect or any possible implementation manner of the first aspect. The computer may be a communication device.

A ninth aspect provides a computer-readable storage medium, on which is stored a computer program (also referred to as an instruction or code) for implementing the method in the second aspect or any possible implementation manner of the second aspect.

For example, when the computer program is executed by a computer, the computer can execute the method in the second aspect or any possible implementation manner of the second aspect. The computer may be a communication device.

In a tenth aspect, the present application provides a chip, including a processor. The processor is used to read and execute the computer program stored in the memory, so as to execute the method in the first aspect and any possible implementation manners thereof.

Optionally, the chip further includes a memory, and the memory and the processor are connected to the memory through a circuit or wires.

Further optionally, the chip further includes a communication interface.

In an eleventh aspect, the present application provides a chip, including a processor. The processor is used to read and execute the computer program stored in the memory, so as to execute the method in the second aspect and any possible implementation manners thereof.

Further optionally, the chip further includes a communication interface.

In a twelfth aspect, the present application provides a computer program product, the computer program product includes a computer program (also referred to as an instruction or code), and when the computer program is executed by a computer, the computer implements the first aspect or the first aspect. A method in any possible implementation of an aspect.

In a thirteenth aspect, the present application provides a computer program product, the computer program product includes a computer program (also referred to as an instruction or code), and when the computer program is executed by a computer, the computer implements the second aspect or the first A method in any possible implementation of the two aspects.

Description of drawings

FIG. 1 is a schematic diagram of a communication system provided by an embodiment of the present application.

Fig. 2 is a schematic diagram of a method for transmitting a sequence provided by an embodiment of the present application.

Fig. 3 is a schematic diagram of the sequence mapping provided by the embodiment of the present application.

Fig. 4 is a schematic diagram of another sequence mapping provided by the embodiment of the present application.

Fig. 5 is a schematic diagram of another sequence mapping provided by the embodiment of the present application.

Fig. 6 is a schematic diagram of another sequence mapping provided by the embodiment of the present application.

Fig. 7 is a schematic diagram of another sequence mapping provided by the embodiment of the present application.

Fig. 8 is a schematic block diagram of an apparatus for transmitting a sequence provided by an embodiment of the present application.

Fig. 9 is a schematic block diagram of another apparatus for transmitting a sequence provided by an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

The technical solution of the embodiment of the present application can be applied to various communication systems, such as: global system for mobile communications (global system for mobile communications, GSM) system, code division multiple access (code division multiple access, CDMA) system, wideband code division multiple access (wideband code division multiple access, WCDMA) system, general packet radio service (general packet radio service, GPRS), long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE Time division duplex (time division duplex, TDD), universal mobile telecommunications system (universal mobile telecommunications system, UMTS), global interconnection microwave access (worldwide interoperability for microwave access, WiMAX) communication system, the future fifth generation (5th generation, 5G) system or new radio (new radio, NR), etc.

It should be understood that the division of methods, situations, categories and embodiments in the embodiments of the present application is only for the convenience of description and should not constitute a special limitation. The features in various methods, categories, situations and embodiments are not contradictory cases can be combined.

It should also be understood that "first", "second" and "third" in the embodiments of the present application are only for distinction and shall not constitute any limitation to the present application. It should also be understood that in various embodiments of the present application, the sequence numbers of the processes do not mean the order of execution, and the execution order of the processes should be determined by their functions and internal logic, and should not be used in the embodiments of the present application. The implementation process constitutes any limitation.

FIG. 1 is a schematic diagram of an inter-device communication system. The wireless communication device may include one or more network devices, such as the network device 110 in FIG. 1 . Both the terminal device 121 and the terminal device 122 can communicate with the network device 110 , for example, in FIG. 1 , the network device 110 communicates with the terminal device 121 . The link through which the terminal device 121 sends data to the network device 110 is called an uplink, and the link through which the terminal device 121 receives data sent by the network device 110 is called a downlink. As shown in FIG. 1 , the communication system may further include multiple terminal devices, such as terminal device 121 and terminal device 122 in FIG. 1 . The terminal device 121 and the terminal device 122 can communicate directly. The link for transmitting data between the terminal device 121 and the terminal device 122 is called a sidelink (sidelink). For example, terminal device 121 may send data to terminal device 122 through a sidelink, and terminal device 122 may send data to terminal device 121 through a sidelink. Sidelinks are generally used in scenarios where direct communication between devices can be performed, such as vehicle to everything (V2X) or device to device (D2D). V2X communication can be regarded as a special case of D2D communication.

New radio (new radio, NR) access technology is currently the mainstream wireless communication technology, which can support V2X communication with lower delay and higher reliability according to V2X business characteristics and new business requirements. V2X is the foundation and key technology for the realization of smart cars, autonomous driving, and intelligent transportation systems. V2X can include vehicle to Internet (vehicle to network, V2N), vehicle to vehicle (vehicle to-vehicle, V2V), vehicle to infrastructure (vehicle to infrastructure, V2I), vehicle to pedestrian (vehicle to pedestrian, V2P), etc. V2N communication is currently the most widely used form of vehicle networking. Its main function is to enable vehicles to connect to cloud servers through mobile networks, and use the application functions such as navigation, entertainment, and anti-theft provided by cloud servers. V2V communication can be used for information exchange and reminders between vehicles, and the most typical application is for vehicle-to-vehicle anti-collision safety systems. Through V2I communication, vehicles can communicate with roads and even other infrastructure, such as traffic lights, roadblocks, etc., and obtain road management information such as traffic light signal timing. V2P communication can be used for safety warning of pedestrians or non-motor vehicles on the road.

The terminal device 121 or the terminal device 122 may be fixed or movable. FIG. 1 is only a schematic diagram. The communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices, which are not shown in FIG. 1 . The embodiment of the present application does not limit the types and quantities of network devices and terminal devices included in the communication system.

In the communication system, the terminal device 121 or the terminal device 122 accesses network devices in the communication system in a wireless manner. The network device 110 may be: a base station, an evolved base station (evolved node B, eNB), a home base station, an access point (access point, AP) in a wireless fidelity (wireless fidelity, WIFI) system, a wireless relay node, A wireless backhaul node, a transmission point (transmission point, TP) or a transmission and reception point (transmission and reception point, TRP), etc., can also be a gNB in an NR system, or it can also be a component or a part of equipment that constitutes a base station, such as Convergence unit (central unit, CU), distributed unit (distributed unit, DU) or baseband unit (baseband unit, BBU), etc.

The terminal device 121 or the terminal device 122 in the communication system may also be called a terminal, user equipment (user equipment, UE), mobile station (mobile station, MS), mobile terminal (mobile terminal, MT) and so on. The terminal device in the embodiment of the present application may be a mobile phone, a tablet computer (Pad), a computer with a wireless transceiver function, or it may be applied to virtual reality (virtual reality, VR), augmented reality (augmented reality, AR) ), industrial control, self driving, remote medical, smart grid, transportation safety, smart city and smart home ) and other wireless terminals in scenarios. In this application, the foregoing terminal equipment and chips applicable to the foregoing terminal equipment are collectively referred to as terminal equipment. It should be understood that the embodiment of the present application does not limit the specific technology and specific device form adopted by the terminal device.

It should be understood that the terminal device 121, the terminal device 122, and the network device 110 are schematically shown in FIG. 1 for ease of understanding, but this should not constitute any limitation to the present application, and there may be more networks in the communication system The device may also include a greater or lesser number of terminal devices, which is not limited in this application.

In the communication system in FIG. 1 , before the terminal device 121 sends data to the network device 110 , the terminal device 121 may send a reference signal to the network device 110 , and the network device 110 may receive a received signal of the reference signal. The network device 110 can estimate the channel between the terminal device 121 and the network device 110 by receiving the signal. At the same time, the network device 110 may also perform positioning or distance measurement on the terminal device 121 . Similarly, before the network device 110 sends data to the terminal device 121, the network device 110 may send a reference signal to the terminal device 121, and the terminal device 121 may receive a received signal of the reference signal. The terminal device 121 may estimate the channel between the network device 110 and the terminal device 121 by receiving signals. At the same time, the terminal device 121 may also perform positioning or distance measurement on the network device 110 . Before the terminal device 122 sends data to the terminal device 121, the terminal device 122 may send a reference signal to the terminal device 121, and the terminal device 121 may receive a received signal of the reference signal. The terminal device 121 may estimate a channel between the terminal device 121 and the terminal device 122 by receiving signals. At the same time, the terminal device 121 may also perform positioning or distance measurement on the terminal device 122 .

In the following, for the convenience of description, the device that sends the reference signal is referred to as the first device, and the device that receives the received signal of the reference signal is referred to as the second device. In an embodiment, the terminal device 121 sends a reference signal to the network device 110 , the first device is the terminal device 121 , and the second device is the network device 110 . In another embodiment, the network device 110 sends a reference signal to the terminal device 121, the first device is the network device 110, and the second device is the terminal device 121. In yet another embodiment, the terminal device 122 sends a reference signal to the terminal device 121, the first device is the terminal device 122, and the second device is the terminal device 121.

After receiving the received signal of the reference signal, the second device may use the sequence of the reference signal locally generated by the second device to perform a correlation operation on the received signal. The transmission time delay of the reference signal is determined by searching for the correlation peak, so that functions such as ranging or positioning of the first device are realized by using the transmission time delay.

When the second device receives interference from other sequences in the received signal of the reference signal, some strong interference peaks may be generated during the above correlation calculation, which will affect the detection result, thereby affecting the second device's detection of the first device. distance or positioning accuracy. The longer the sequence length of the reference signal generated by the first device is, the better the anti-interference capability of the sequence is, so the interference is smaller when the second device performs the correlation operation. Therefore, the first device can use a longer sequence to improve the ability to resist interference. In wireless communication systems such as long term evolution (long term evolution, LTE) or new radio (new radio, NR), the first device can split and map multiple sequence elements of a longer sequence to multiple OFDM Send on (orthogonal frequency division multiplexing, OFDM) symbols. However, if multiple sequence elements of the generated sequence are randomly mapped to multiple OFDM symbols for transmission, the good correlation of the sequence may be destroyed, which will make the detection result inaccurate, and also affect the second device's detection of the first device. distance or positioning accuracy.

For example, the sequence for generating the reference signal is Zadoff-Chu (ZC) sequence as an example, and the ZC sequence can be generated according to the following formula (1), X _μ (k).

Among them, N is the length of the ZC sequence, μ is the root index. In the case of a fixed sequence length N, different ZC sequences can be generated using different root exponents μ. The ZC sequence has good autocorrelation. After the first device sends the ZC sequence X _μ (k), the sequence that reaches the second device after the transmission time τ is X _μ (k+τ). The second device can use the known sequence X _μ (k) to perform a correlation operation on the received sequence X _μ (k+τ) through the formula (2), and can find the unique peak N at the position n=τ. That is to say, n when the correlation is maximum corresponds to the transmission duration τ.

That is to say, the transmission duration τ of the sequence X _μ (k) can be determined through the correlation operation of formula (2), and the distance between the first device and the second device can be determined by multiplying the speed of light by the transmission duration τ. The second device can locate the first device according to the distance between multiple pairs of transceiver devices, or the second device can measure the angle with the first device to realize the positioning of the first device.

For sequences with good correlation performance, the longer the sequence length, the better the anti-jamming performance. Taking the ZC sequence as an example, assuming that the first device is sending the sequence X _μ (k), while the third device is sending the sequence X _ν (k), X _ν (k) is a sequence whose root index is V, and the sequence X _μ (k) and sequence X _ν (k) are both of length N, then sequence X _μ (k) and sequence X _ν (k) can be correlated by formula (3).

From the formula (3), we can know the cross-correlation interference between the sequence X _μ (k) and the sequence X _ν (k)

The ratio of N relative to the peak value of the autocorrelation is

That is to say, when the sequence is longer, that is, N is larger, the ratio

The smaller it is, the better the anti-interference ability is. Therefore, in order to improve the anti-interference capability, it is necessary for the first device to map a long sequence on multiple OFDM symbols. If a long sequence is randomly mapped over multiple OFDM symbols, the correlation of the sequence may be broken. Therefore, how to map a long sequence on multiple OFDM symbols so as to improve the anti-interference performance and at the same time perform ranging or positioning on the first device sending the sequence X _μ (k) is an urgent problem to be solved.

The method 200 for transmitting a sequence provided by the embodiment of the present application is described below with reference to FIG. 2 . Method 200 includes:

S201. The first device generates a first sequence X(k) of length N, where k=0, 1, . . . , N−1.

S202. The first device sends a first sequence to the second device on L symbols, and the second device receives a received signal corresponding to the first sequence.

Optionally, the first device sends the first sequence to the second device on L symbols, including: the first device maps the first sequence on the L symbols, and performs fast Fourier inversion on the mapped first sequence Transform (inverse fast fourier transform, IFFT) and modulate to obtain a time-domain signal, and send it to the second device.

Optionally, the first sequence may be a long sequence, for example, the length of the first sequence is greater than a preset value, and the preset value may be specified by a protocol.

Optionally, the length N of the first sequence may be configured by configuration information of the network device. Optionally, if the first sequence is a sequence corresponding to the PRS, the first device is a terminal device, and the second device is a network device, then the network device may send configuration information of length N configuring the first sequence to the positioning server, and the positioning server Send the configuration information to the terminal device.

Wherein, the first sequence includes P subsequences, and each subsequence in the P subsequences includes one or more continuous sequence elements, and the sequence elements of the same subsequence in the P subsequences are mapped on the same symbol, and the ith subsequence in the P subsequences The subsequence and the i+1th subsequence are respectively mapped on the l _i th symbol and the l _i+1 th symbol among the L symbols, and l _i is different from l _i+1 . At least two subsequences in the P subsequences are mapped on the same symbol, and any adjacent sequence elements of the i-th subsequence are mapped to the subcarriers included in the l _i -th symbol at equal intervals according to the first frequency domain interval, and the i-th sub-sequence The subcarrier interval mapped to the subcarrier mapped by the last sequence element of the i subsequence and the first sequence element of the i+1th subsequence is the first frequency domain interval, P is an integer greater than or equal to 3, and i= 0, ..., P-1, the sum of the lengths of P subsequences is N.

That is to say, among the P subsequences, two adjacent subsequences need to be mapped to different symbols, but non-adjacent subsequences can be mapped to the same symbol. Elements of the same subsequence need to be mapped on a symbol. In other words, if one or more consecutive sequence elements are mapped to one symbol, then the one or more consecutive sequence elements form a subsequence. Two consecutive sequence elements belong to different subsequences if they map on different symbols. Two sequence elements that are not consecutive on the same symbol belong to different subsequences.

Optionally, the first frequency domain interval can be Δf, if X(k) is mapped on the s _kth subcarrier, then X(k+1) can be mapped on the (s _k +Δf)modS subcarrier, S is the total number of subcarriers, and mod is a modulo operation.

Optionally, the P subsequences may be mapped on the L symbols according to a preset pattern, and sequence elements included in each subsequence of the P subsequences are continuous.

It can be understood that the L symbols represent symbols mapped with sequence elements, and if a certain symbol is not mapped with a sequence element, the symbol is not included in the L symbols.

Optionally, among the L symbols, the first symbol mapped with sequence elements and the last symbol mapped with sequence elements may be adjacent symbols mapped with sequence elements, for example, L=3, assuming that among the 3 symbols The last symbol is a mapped sequence element, then the next symbol of the mapped sequence element adjacent to the last symbol may be the first symbol among the 3 symbols.

Optionally, the first frequency domain interval may be configured by configuration information of the network device. Optionally, if the first sequence is a sequence corresponding to the PRS, the first device is a terminal device, and the second device is a network device, then the network device may send configuration information configuring the first frequency domain interval to the positioning server, and the positioning server will The configuration information is sent to the terminal device.

Optionally, mapping the total bandwidth of the first sequence may be preset or configured by configuration information of the network device. Optionally, if the first sequence is a sequence corresponding to the PRS, the first device is a terminal device, and the second device is a network device, then the network device may send configuration information configuring the total bandwidth of the first sequence to the positioning server, and the positioning server Send the configuration information to the terminal device.

Optionally, the first sequence generation method may be preset, the first device generates the first sequence according to the preset method, and the second device may also generate the first sequence according to the preset method.

For example, as shown in Figure 3, P=4, the first sequence is composed of 4 subsequences, N=6, X(0) is the 0th subsequence, X(1) is the 1st subsequence, and X(2) is The second subsequence, X(3), X(4), X(5) constitutes the third subsequence, at this time, two adjacent The frequency domain interval of a sequence element is 2 subcarriers, the frequency domain interval of X(0) and X(1) is 2 subcarriers, the frequency domain interval of X(1) and X(2) is 2 subcarriers, X(2 ) and X(3) are separated by 2 subcarriers in the frequency domain. Both the first subsequence and the third subsequence are mapped on one symbol, and the interval in the first frequency domain is 2 subcarriers. In FIG. 2, L is equal to 2, that is, the first sequence is sent on 2 symbols. For another example, as shown in Figure 4, P=6, the first sequence is composed of 6 subsequences, if N=6, X(0) is the 0th subsequence, X(1) is the 1st subsequence, X( 2) is the 2nd subsequence, X(3) is the 3rd subsequence, X(4) is the 4th subsequence, X(5) is the 5th subsequence, at this time, the sequence elements of two adjacent subsequences The frequency domain spacing is 2 subcarriers, the frequency domain spacing of X(0) and X(1) is 2 subcarriers, the frequency domain spacing of X(1) and X(2) is 2 subcarriers, and the frequency domain spacing of X(2) and X The frequency domain interval of (3) is 2 subcarriers, the frequency domain interval of X(3) and X(4) is 2 subcarriers, and the frequency domain interval of X(4) and X(5) is 2 subcarriers, that is, A frequency domain interval is 2 subcarriers. The 0th subsequence X(0), the 2nd subsequence X(2) and the 4th subsequence X(4) are mapped on the same symbol, the 1st subsequence X(1), the 3rd subsequence X(3) and the fifth subsequence X(5) are mapped on the same symbol. In FIG. 4, L is equal to 2, that is, the first device sends the first sequence on 2 symbols.

Optionally, the length of each subsequence in the first P-1 subsequences among the P subsequences is equal to h ₁ , the length of the last subsequence in the P subsequences is h ₂ , and h ₁ is the same as h ₂ or Differently, (P-1)·h ₁ +h ₂ =N. Such as

or,

As shown in Figure 5, the first sequence includes 3 subsequences, P=3, N=5, X(0), X(1) is the 0th subsequence, X(2), X(3) is the 1st subsequence subsequence, X(4) is the second subsequence, h ₁ is 2, h ₂ is 1, and the first frequency domain interval is 2. That is to say, make the sequence elements included in the subsequences mapped on each symbol equal as much as possible, that is, map the sequence elements evenly as much as possible, so that the design can be simplified, and it is beneficial for the second device to perform Included subsequences are configured.

Optionally, each subsequence in the P subsequences is composed of a sequence element, that is to say, a subsequence is a sequence element, and a sequence element is a subsequence. As shown in FIG. 4 or FIG. 6, P=6, the first sequence is composed of 6 subsequences, and the first sequence is also composed of 6 elements.

Optionally, when each subsequence consists of one sequence element, the first frequency domain interval can be Δf, if X(k) is mapped to the s _kth subcarrier, then X(k+1) can be mapped to the ( s _k +Δf) mod S subcarriers. S is the total number of subcarriers, and mod is a modulo operation.

Optionally, the symbol position mapped by X(k) is l _start + pattern _L (k), wherein, l _start is the start position of the time domain symbol, and pattern _L (k) is the relative symbol of the sequence element X (k) map The symbol offset at l _start , the value of pattern _L (k) is 0, δ, 2δ,..., (L-1) δ, where δ is two adjacent symbols mapped to different sequence elements The symbol interval of , δ is a positive integer greater than or equal to 1. That is to say, pattern _L (k) represents the offset of each sequence element relative to the start position of the time-domain symbol. If the value of k is different, pattern _L (k) may be the same or different. Optionally, δ=1, then the value of pattern _L (k) is 0, 1, 2, . . . , (L-1). As shown in Figure 3, N=6, δ=3, the values of pattern _L (k) are 0, 3, 6,...,3·(L-1), if l _start is the first in Figure 3 One symbol, pattern _L (0)=0, pattern _L (1)=3, pattern _L (2)=0, pattern _L (3)=3, pattern _L (4)=3, pattern _L (5)= 3. As shown in Figure 4, N=6, δ=3, the values of pattern _L (k) are 0, 3, 6,...,3·(L-1), if l _start is the first in Figure 4 One symbol, pattern _L (0)=0, pattern _L (1)=3, pattern _L (2)=0, pattern _L (3)=3, pattern _L (4)=0, pattern _L (5)= 3. As shown in Figure 5, δ=4, the value of pattern _L (k) is 0, 4, 8,..., the value in 4 (L-1), if l _start is the first symbol in Figure 5, _patternL (0)=0, _patternL (1)=0, _patternL (2)=4, _patternL (3)=4, _patternL (4)=0. As shown in Figure 6, δ=3, the value of pattern _L (k) is 0, 3, 6,..., the value in 3 (L-1), if l _start is the first symbol in Figure 6, pattern _L (0)=0, pattern _L (1)=3, pattern _L (2)=6, pattern _L (3)=0, pattern _L (4)=3, pattern _L (5)=6.

Optionally, l _start may be a preset value or configured by configuration information of the network device. Optionally, l _start may be a value specified in the protocol. Optionally, if the first sequence is a sequence corresponding to the PRS, the first device is a terminal device, and the second device is a network device, then the network device may send the configuration information of configuration l _start to the positioning server, and the positioning server sends the configuration information to to the terminal device.

Optionally, pattern _L (k) may be a value in 0, δ, 2δ, ..., (L-1)·δ specified in the protocol. Optionally, pattern _L (k) may also be configured by configuration information of network devices. Optionally, if the first sequence is a sequence corresponding to the PRS, the first device is a terminal device, and the second device is a network device, then the network device may send the configuration information of the configuration pattern _L (k) to the positioning server, and the positioning server will The configuration information is sent to the terminal device.

Optionally, δ may be a value configured in configuration information of the second device or specified in a protocol. Optionally, if the first sequence is a sequence corresponding to the PRS, the first device is a terminal device, and the second device is a network device, then the network device may send the configuration information of configuration δ to the positioning server, and the positioning server sends the configuration information to Terminal Equipment.

Optionally, when k=0,1,2,...,L-1, the value of pattern _L (k) is 0,δ,2δ,...,(L-1)·δ in the first arrangement The kth element; when k=L, L+1,...,N-1, the value of pattern _L (k) is pattern _L (kmodL). Optionally, N is greater than L. That is to say, when the value of k is less than L, each element of L sequence elements mapped on L symbols corresponds to a symbol offset, and when the value of k is greater than or equal to L and less than N , the symbol offset corresponding to each sequence element can be obtained by performing a modulo operation according to the symbol offset when the value of k is less than L. In this way, if the second device configures the pattern _L (k) for the first device, it only needs to configure the pattern L (k) whose k value is less than L, and does not configure the pattern _L (k) whose k is greater than or equal to _L , so that Save signaling overhead. Or the protocol only needs to specify the pattern L (k) whose value of k is less than L, and does not specify the pattern _L (k) whose value of k is greater than or equal to _L , so that the design can be simplified.

Optionally, the first arrangement can be a preset arrangement composed of 0, δ, 2δ, ..., (L-1)·δ in sequence, wherein the pattern _L (k) corresponding to different values of k can be It is the same element or a different element in the first arrangement. It is only necessary to ensure that sequence elements are mapped to L symbols, and the number of sequence elements mapped to each symbol is not limited. Some symbols can map fewer sequence elements , and some symbols can map more sequence elements. For example, the first arrangement may be (L-1)·δ,(L-2)·δ,...,2δ,δ,0.

Optionally, the first arrangement can be 0, δ, 2δ, ..., (L-1) δ, and when k is less than L, pattern _L (k) corresponds to the first arrangement 0, δ, 2δ, ..., The k-th element in (L-1)·δ, that is to say pattern _L (k)=δ·k.

For example, δ=2, L=4, the first arrangement can be 0, 2, 4, 6, N=8, pattern _L (0)=0,

_patternL (1)=2, _patternL (2)=4, _patternL (3)=6.

pattern _L (4) = pattern _L (4mod4) = pattern _L (0) = 0,

pattern _L (5) = pattern _L (5mod4) = pattern _L (1) = 2,

pattern _L (6) = pattern _L (6mod4) = pattern _L (2) = 4,

_patternL (7)= _patternL (7mod4)= _patternL (3)=6.

That is, X(0) and X(4) are mapped on the same symbol, X(1) and X(5) are mapped on the same symbol, and X(2) and X(6) are mapped on the same symbol On, X(3) and X(7) are mapped on the same symbol.

It should be noted that pattern _L (k) can be understood as a sign pattern of sequence element X(k) in the time domain. The N sequence elements constituting the first sequence can be mapped to multiple symbols in the time domain by means of a symbol pattern.

Optionally, the above pattern _L (k) may be preset, or may also be generated according to the preset. For example, pattern _L (k) can be generated by pattern _L (k)', where pattern _L (k)' is a preset symbol pattern, or pattern _L (k)' is mapped to a preset sequence element X(k) The symbol offset of the symbol relative to l _start . In this way, the first device can generate pattern _L (k) according to pattern _L (k)'. Optionally, a manner for the first device to generate pattern _L (k) according to pattern _L (k)' may be preset or stipulated in a protocol.

Optionally, when k=0,1,2,...,L-1, pattern _L (k)=pattern _L ((k+q)modL)'; wherein, the value of q is 0, 1,... , the value in L-1, pattern _L (k)' is the offset of the symbol mapped by the sequence element X(k) relative to l _start , and the value of pattern _L (k)' is 0, δ, 2δ ,...,(L-1)·δThe kth element in the second arrangement. That is to say, pattern _L (k) can be shifted and modulo-generated according to pattern _L (k)'. In this way, the value of pattern _L (k) is still the element in the second arrangement composed of 0, δ, 2δ, ..., (L-1)·δ, but pattern _L (k) may not be equal to pattern _L (k )'.

For example, δ=2, L=4, the value of pattern _L (k)' is the element in the

second arrangement

6, 4, 2, 0, pattern _L (0)'=6, pattern _L (1) '=4, pattern _L (2)'=2, pattern _L (3)'=0. q=1,

pattern _L (1)=pattern _L ((1+1)mod4)'=pattern _L (2)'=2,

pattern _L (2)=pattern _L ((2+1)mod4)'=pattern _L (3)'=0,

pattern _L (3) = pattern _L ((3+1)mod4)' = pattern _L (0)' = 6

_patternL (4)= _patternL ((4+1)mod4)'= _patternL (1)'=4.

Optionally, the second arrangement can be 0, δ, 2δ, ..., (L-1) δ, and when k is less than L, pattern _L (k)' corresponds to the first arrangement 0, δ, 2δ, ... , the kth element in (L-1)·δ, that is to say pattern _L (k)'=δ·k.

Optionally, the value of q may be a value in 0, 1, ..., L-1 configured in the configuration information, or a value in 0, 1, ..., L-1 specified in the protocol. Optionally, if the first sequence is a sequence corresponding to the PRS, the first device is a terminal device, and the second device is a network device, then the network device may send the configuration information of configuration q to the positioning server, and the positioning server may send the configuration information to Terminal Equipment.

Optionally, the first arrangement can be the same as the second arrangement. Optionally, the first arrangement can be different from the second arrangement.

The above is described by sequence elements. Since a subsequence can be composed of one or more consecutive sequence elements, and the sequence elements forming a subsequence are mapped on a symbol, the subsequence can also be used to represent the mapping in the time domain Way. The following subsequences are used to represent the mapping method in the time domain.

Optionally, the symbol position of the i-th subsequence is l' _start + pattern _L (i), wherein, l' _start is the start position of the time-domain symbol, and pattern _L (i) is the symbol mapped to the i-th sub-sequence relative to The symbol offset of pattern _L (i) is 0, δ', 2δ',..., (L-1)·δ', and δ' is two adjacent elements mapped with different sequence elements The symbol interval of symbols, δ' is a positive integer greater than or equal to 1. That is to say, pattern _L (i) represents the offset of each subsequence relative to the start position of the time-domain symbol, and if the value of i is different, pattern _L (i) may be the same or different. Optionally, δ=1, then the value of pattern _L (i) is 0, 1, 2, . . . , (L-1). As shown in Figure 3, δ=3, the value of pattern _L (i) is the value in 0, 3, 6, ..., 3 · (L-1), assuming that l' _start is the first symbol in Figure 3 , there are four subsequences in Figure 3, when i=0, the 0th subsequence is X(0), when i=1, the first subsequence is X(1), when i=2, the second subsequence is X( 2), when i=3, the third subsequence is X(3), X(4), X(5), pattern _L (0)=0 corresponding to the 0th subsequence, pattern _L corresponding to the first subsequence (1)=3, the pattern _L (2)=0 corresponding to the second subsequence, and the pattern _L (3)=3 corresponding to the third subsequence. As shown in Figure 4, δ=3, the value of pattern _L (i) is 0, 3, 6, ..., the value in 3 (L-1), assuming that l' _start is the first symbol in Figure 4 , the first sequence in Figure 4 consists of 6 subsequences, when i=0, the 0th subsequence is X(0), when i=1, the first subsequence is X(1), when i=2, the second The subsequence is X(2), when i=3, the 3rd subsequence is X(3), when i=4, the 4th subsequence is X(4), when i=5, the 5th subsequence is X( 5), pattern _L (0)=0 corresponding to the 0th subsequence, pattern _L (1)=3 corresponding to the 1st subsequence, pattern _L (2)=0 corresponding to the 2nd subsequence, corresponding to the 3rd subsequence The pattern _L (3)=3, the pattern _L (4)=0 corresponding to the 4th subsequence, and the pattern _L (5)=3 corresponding to the 5th subsequence. As shown in Figure 5, δ=4, the value of pattern _L (i) is 0, 4, 8, ..., the value in 4 (L-1), assuming that l' _start is the first symbol in Figure 5 , the first sequence in Fig. 5 is composed of 3 subsequences, when N=5, i=0, the 0th subsequence is X(0), X(1); when i=1, the 1st subsequence is X(2 ), X(3); when i=2, the second subsequence is X(4). The pattern _L (0)=0 corresponding to the 0th subsequence, the pattern _L (1)=4 corresponding to the first subsequence, and the pattern _L (2)=0 corresponding to the second subsequence. As shown in Figure 6, δ=3, the value of pattern _L (i) is 0, 3, 6, ..., the value in 3 (L-1), assuming that l' _start is the first symbol of Figure 6, There are 6 subsequences in Figure 6. When i=0, the 0th subsequence is X(0); when i=1, the first subsequence is X(1); when i=2, the second subsequence is X(2 ), when i=3, the 3rd subsequence is X(3), when i=4, the 4th subsequence is X(4), when i=5, the 5th subsequence is X(5), the 0th subsequence The pattern _L (0)=0 corresponding to the sequence, the pattern _L (1)=3 corresponding to the first subsequence, the pattern _L (2)=6 corresponding to the second subsequence, and the pattern _L (3) corresponding to the third subsequence =0, the pattern _L (4)=3 corresponding to the 4th subsequence, and the pattern _L (5)=6 corresponding to the 5th subsequence.

Optionally, l′ _start may be a preset value or configured by configuration information of the network device. Optionally, l' _start may be a value specified by the protocol. Optionally, if the first sequence is a sequence corresponding to the PRS, the first device is a terminal device, and the second device is a network device, then the network device can send the configuration information of the configuration 1' _start to the positioning server, and the positioning server sends the configuration information sent to the terminal device.

Optionally, pattern _L (i) may be a value among 0, δ, 2δ, ..., (L-1)·δ specified in the protocol. Optionally, pattern _L (i) may also be configured by configuration information of network devices. Optionally, if the first sequence is a sequence corresponding to the PRS, the first device is a terminal device, and the second device is a network device, then the network device may send the configuration information of the configuration pattern _L (i) to the positioning server, and the positioning server will The configuration information is sent to the terminal device.

Optionally, when i=0,1,2,...,L-1, pattern _L (i) takes the value of 0,δ',2δ',...,(L-1)·δ' to form the third The i-th element in the array; when i=L, L+1,...,P-1, the value of pattern _L (i) is pattern _L (imodL). Optionally, N is greater than L. That is to say, when the value of i is less than L, each subsequence mapped on L symbols corresponds to a symbol offset, and when the value of i is greater than or equal to L and less than P-1 , the symbol offset corresponding to each subsequence can be obtained by performing a modulo operation according to the symbol offset when the value of i is less than L. In this way, if the second device configures the pattern _L (i) for the first device, it only needs to configure the pattern L (i) whose i value is less than L, and does not configure the pattern _L (i) whose i is greater than or equal to _L , so that Save signaling overhead. Or the protocol only needs to specify the pattern L (i) whose value of i is less than L, but not the pattern _L (i) whose value of i is greater than or equal to _L , so as to simplify the design.

Optionally, the third arrangement may be a preset arrangement composed of 0, δ', 2δ', ..., (L-1)·δ' in sequence, where different values of i correspond to pattern _L ( i) It can be the same element or a different element in the third arrangement. It is only necessary to ensure that there are subsequences mapped to L symbols, and there is no limit to the number of subsequences mapped to each symbol. Some symbols have subsequences mapped It can be less, and the subsequences mapped on some symbols can be more. For example, the third arrangement may be (L-1)·δ', (L-2)·δ', . . . , 2δ', δ',0.

Optionally, the third arrangement can be 0, δ', 2δ', ..., (L-1)·δ', and when i is less than L, pattern _L (i) corresponds to the third arrangement 0, δ', The ith element in 2δ',...,(L-1)·δ', that is to say pattern _L (i)=δ·i.

For example, δ'=2, L=4, the third arrangement can be 0, 2, 4, 6, P=8, pattern _L (0)=0,

_patternL (1)=2, _patternL (2)=4, _patternL (3)=6. therefore,

pattern _L (4) = pattern _L (4mod4) = pattern _L (0) = 0,

pattern _L (5) = pattern _L (5mod4) = pattern _L (1) = 2,

pattern _L (6) = pattern _L (6mod4) = pattern _L (2) = 4,

_patternL (7)= _patternL (7mod4)= _patternL (3)=6.

That is to say, the 0th subsequence and the fourth subsequence are mapped on the same symbol, the first subsequence and the fifth subsequence are mapped on the same symbol, and the second subsequence and the sixth subsequence are mapped on the same symbol On , the third subsequence and the seventh subsequence are mapped on one symbol.

It should be noted that pattern _L (i) can be understood as a sign pattern of the i-th subsequence in the time domain. The P subsequences constituting the first sequence can be mapped to multiple symbols in the time domain by means of a symbol pattern.

Optionally, the above pattern _L (i) may be preset, or may also be generated according to the preset. For example, pattern _L (i) can be generated by pattern _L (i)', where pattern _L (i)' is a preset symbol pattern, or pattern _L (i)' is the symbol relative to the preset i-th subsequence mapping Symbol offset from l' _start . In this way, the first device can generate pattern _L (i) according to pattern _L (i)'. Optionally, a manner for the first device to generate pattern _L (i) according to pattern _L (i)' may be preset or specified by a protocol.

Optionally, when i=0,1,2,...,L-1, pattern _L (i)=pattern _L ((i+q')modL)'; wherein, the value of q' is 0,1 , 2,..., the value in L-1, pattern _L (i) is the symbol offset of the symbol of the i-th subsequence relative to l' _start predefined symbol offset, pattern _L (i)' takes a value of 0, δ',2δ',...,(L-1)·δ' is the i-th element in the fourth arrangement. That is to say, pattern _L (i) can be shifted and modulo-generated according to pattern _L (i)'. In this way, the value of pattern _L (i) is still the element in the fourth arrangement composed of 0, δ, 2δ, ..., (L-1)·δ, but pattern _L (i) may not be equal to pattern _L (i )'.

For example, δ'=2, L=4, the value of pattern _L (i)' is the element in the

fourth arrangement

6, 4, 2, 0, pattern _L (0)'=6, pattern _L (1 )'=4, pattern _L (2)'=2, pattern _L (3)'=0. q'=1,

pattern _L (0)=pattern _L ((0+1)mod4)'=pattern _L (1)'=4,

pattern _L (1)=pattern _L ((1+1)mod4)'=pattern _L (2)'=2,

pattern _L (2) = pattern _L ((2+1)mod4)' = pattern _L (2)' = 0

_patternL (3)= _patternL ((3+1)mod4)'= _patternL (0)'=6.

Optionally, the fourth arrangement can be 0, δ', 2δ', ..., (L-1)·δ', and when i is less than L, pattern _L (k)' corresponds to the fourth arrangement 0, δ',2δ',...,(L-1)·δ' is the th element, that is to say pattern _L (k)'=δ·k.

Optionally, the value of q' may be a value in 0, 1, ..., L-1 configured in the configuration information, or a value in 0, 1, ..., L-1 specified in the protocol. Optionally, if the first sequence is a sequence corresponding to the PRS, the first device is a terminal device, and the second device is a network device, then the network device may send the configuration information of the configuration q' to the positioning server, and the positioning server sends the configuration information to to the terminal device.

Optionally, in S201, the first sequence may be a sequence corresponding to a reference signal, and the first sequence may also be called a reference signal sequence. For example, the first sequence may be a sequence corresponding to a demodulation reference signal (demodulation reference signal, DMRS). In another example, the first sequence may be a sequence corresponding to a positioning reference signal (positioning reference signal, PRS). For another example, the first sequence may be a sounding reference signal (sounding seference signal, SRS), and the first sequence may be a sequence corresponding to a sidelink (sidelink, SL) DMRS or a sequence corresponding to an SL PRS or a sequence corresponding to an SL SRS .

The above-mentioned mapping methods shown in FIG. 2-FIG. 6 may be DMRS mapping methods. For example, as shown in FIG. On 4 symbols, the first sequence is X(0), X(1), X(2), X(3), X(4), X(5), X(6), X(7), X (8), X(9), X(10), X(11). The frequency domain interval between two adjacent sequence elements of the first sequence is one subcarrier. The third device can map the third sequence corresponding to the PRS with a length of 12 on 4 symbols, and the third sequence is W(0), W(1), W(2), W(3), W(4) , W(5), W(6), W(7), W(8), W(9), W(10), W(11). The frequency domain interval between two adjacent sequence elements of the third sequence is one subcarrier. That is to say, corresponding to the PRS, a long sequence mapping method can be provided. The PRS is a positioning reference signal, that is to say, while the PRS can be positioned, the long sequence can be used to reduce interference.

S203. The second device processes the received signal according to the first sequence.

Specifically, the first sequence is a known sequence that the second device can obtain. In other words, the second device knows what sequence the first device sent, and the second device can process the received signal according to the sequence sent by the first device.

Optionally, in S203, the second device calculates the transmission duration of the received signal according to the first sequence.

Optionally, the second device may analyze the received signal, and concatenate the second sequence from the analyzed received signal according to a mapping manner in which the first sequence is mapped to the L symbols. Optionally, the second device may analyze the received signal, and splice the second sequence from the analyzed received signal according to the mapping manner in which the first sequence is mapped to the L symbols, which may include: the second device performs fast processing on the received signal Fourier transformation (fast fourier transformation, FFT) to obtain the frequency domain signal, and splicing according to the frequency domain signal to obtain the second sequence. In other words, the second device can learn how the first device maps each sequence element of the first sequence, and the second device can sequentially obtain each sequence element from the received information obtained by parsing according to the mapping method that the first device maps the first sequence. sequence elements, so that each sequence element is spliced into a second sequence. Alternatively, the second device can know how the first device maps each subsequence of the first sequence, and the second device can sequentially obtain each subsequence from the received information obtained by parsing according to the mapping method of the first device mapping the first sequence , so that the obtained subsequences are used to assemble the second sequence. That is to say, the second sequence is the sequence received by the second device, and the first sequence is the sequence sent by the first device. The second device may determine the transmission duration of the received signal according to the second sequence and the first sequence.

The following describes how the second device determines the transmission duration of the received signal according to the second sequence and the first sequence.

In case one, the transmission duration of the reference signal is determined according to formula (4):

Among them, X(k) is the sequence element in the first sequence, Y(k) is the sequence element corresponding to X(k) in the second sequence, and the value of k is 0, 1, 2, ..., N- 1; the length of the first sequence and the length of the second sequence are both M, Δf is the first frequency domain interval, S is the total number of subcarriers in the frequency domain, τ is the transmission duration of the received signal,

is the first phase sequence factor related to the transmission duration τ of the received signal.

Since the shift of the sequence elements that make up the first sequence in the time domain is equivalent to the phase shift in the frequency domain, the transmission duration τ of X(k) is equal to the phase shift in the frequency domain by

Therefore, the relationship between X(k) and Y(k) can be shown in formula (4). In other words, the second device can determine the transmission duration of the received signal according to the second sequence obtained by splicing the received signal and the first sequence sent by the first device. That is to say, X(k) and Y(k) in formula (4) are known, S is known, and Δf is known, so only the transmission duration τ is unknown. Therefore, according to the principle of formula (4) Determines the transmission duration of the received signal.

In the second case, the second device determines the transmission duration of the received signal according to the second sequence and the first sequence, including: determining the transmission duration of the received signal according to the conjugate sequence of the second sequence and the first sequence. Since the second device can know the first sequence, it can also know the conjugate sequence of the first sequence.

Optionally, determine the transmission duration of the received signal according to the conjugate sequence of the second sequence and the first sequence: determine the transmission duration of the received signal according to the second sequence, the conjugate sequence of the first sequence and a plurality of known phase sequence factors . Optionally, the second device may perform a correlation operation based on a plurality of known phase sequence factors, the conjugate sequence of the first sequence and the second sequence, and may use the phase sequence with a higher correlation degree or the highest after the correlation operation The parameter corresponding to the factor is determined as the transmission duration of the received signal.

Among them, the second case is divided into two cases a and b.

In case a, optionally, the transmission duration of the reference signal is determined according to the second sequence, the conjugate sequence of the first sequence and a plurality of known phase sequence factors, including: G

The d _j corresponding to the maximum value in is determined as the transmission duration τ of the received signal, that is to say, one d _j corresponds to one

Different d _j correspond to

different, there are G different d _j , so there are G

in,

It is any phase sequence factor among the G known phase sequence factors, G is a positive integer, and the value of j is 1, 2, ..., G; Δf is the first frequency domain interval, and S is the frequency domain The total number of subcarriers above, Y(k) is the sequence element in the second sequence, X(k) is the sequence element corresponding to Y(k) in the first sequence, X ^* (k) is the sequence element in the first sequence A sequence element corresponding to X(k) in a sequence of conjugated sequences, the value of k is 0, 1, 2, ..., N-1, the length of the first sequence and the total length of the second sequence The length of the yoke sequence is N.

That is to say, G

The maximum value in is also the maximum correlation. In other words, the d _j corresponding to the maximum correlation is the transmission duration of the received signal.

Optionally, d _i is a positive integer less than or equal to S/Δf.

In case b, optionally, the conjugate sequence of the second sequence and the first sequence determines the transmission duration of the reference signal, including: padding the second sequence with zeros to obtain the third sequence, and complementing the conjugate sequence of the first sequence Zero, get the fourth sequence; carry out the inverse Fourier transform IFFT of RL point to the product of Y(k') and X ^* (k'), k' takes 0, 1, 2,..., RL-1; The transmission duration of the reference signal is determined according to the maximum peak position after the IFFT transformation.

Wherein, Y(k') is the sequence element in the third sequence, X ^* (k') is the sequence element corresponding to Y(k') in the fourth sequence, the length of the third sequence and the length of the fourth sequence are both For RL, the value of k' is 0, 1, 2,..., RL-1, when the value of k' is N, N+1,..., RL-1, in the third sequence Y(k ') and the fourth sequence X ^* (k') are both 0; N is the length of the first sequence and the second sequence, Δf is the first frequency domain interval, S is the total number of subcarriers in the frequency domain, and R is such that The smallest integer for which RL is greater than or equal to N.

Optionally, the total number of subcarriers S may be a value specified in the protocol.

Optionally, after determining the transmission duration of the received signal, the second device may determine the location of the first device according to the transmission duration of the received signal.

Optionally, after determining the transmission duration of the received signal, the second device may locate the first device according to the transmission duration. Optionally, the second device locates the first device according to the transmission duration, including: the second device determines the distance between the second device and the first device according to the transmission duration and the speed of light, and the second device determines the distance between the second device and the first device according to the distance between the second device and the first device. The distance locates the first device.

It should be noted that, in the embodiment of the present application, the mapping manners of the first sequence in FIG. 3 to FIG. 7 are only described as examples, and should not impose any limitation on the embodiment of the present application.

It should also be noted that in the embodiment of the present application, the length of the first sequence in Fig. 3 to Fig. 7 is only described as an example. Since the first sequence is a long sequence, in order to avoid redundant description caused by using a long sequence as an example, only Less sequence elements are exemplified.

The method for transmitting a sequence provided by the embodiment of the present application has been described in detail above with reference to FIG. 2 to FIG. 7 . Hereinafter, the communication device for transmitting a sequence provided by the embodiment of the present application will be described in detail with reference to FIG. 8 and FIG. 9 .

FIG. 8 is a schematic block diagram of a transmission sequence provided by an embodiment of the present application. As shown in FIG. 8 , the communication device 800 may include a transceiver unit 810 and a processing unit 820 .

In a possible implementation manner, the communication apparatus 800 may correspond to the first device in the above method embodiment, for example, may be the first device, or a chip configured in the first device. The communication apparatus 800 is configured to execute various steps or processes corresponding to the first device in the above methods.

Wherein, the processing unit 820 is used to generate the first sequence X(k) of length N, k=0,1,...,N-1;

The transceiver unit 810 is configured to transmit the first sequence on L symbols, the first sequence includes P subsequences, each of the P subsequences includes one or more consecutive sequence elements, and the P The sequence elements of the same subsequence in the subsequences are mapped on the same symbol, and the i-th subsequence and the _i +1th subsequence in the P subsequences are respectively mapped to the l-th symbol and the l-th symbol in the L symbols On _i+1 symbols, l _i is different from l _i+1 , there are at least two subsequences mapped on the same symbol in the P subsequences, and any adjacent sequence elements of the i-th subsequence follow the first The intervals in the frequency domain are mapped to the subcarriers included in the l _i th symbol, and the subcarrier mapped to the last sequence element of the i th subsequence is the same as the first subcarrier of the i+1 th subsequence The interval between the subcarriers mapped by the sequence elements is the first frequency domain interval, and the sum of the lengths of the P subsequences is N;

As an optional embodiment, the length of each subsequence in the first P-1 subsequences among the P subsequences is equal to h ₁ , and the length of the last subsequence in the P subsequences is h ₂ , h ₁ and h ₂ are the same or different, (P-1)·h ₁ +h ₂ =N, h ₁ and h ₂ are positive integers greater than or equal to 1.

As an optional embodiment, P=N, and each subsequence in the P subsequences consists of one sequence element.

As an optional embodiment, the symbol position of the X(k) mapping is l _start + pattern _L (k),

As an optional embodiment, when k=0,1,2,...,L-1, pattern _L (k) takes the value of 0,δ,2δ,...,(L-1)·δ to form the first The kth element in the array; when k=L, L+1,...,N-1, the value of pattern _L (k) is pattern _L (kmodL).

As an optional embodiment, when k=0, 1, 2, . . . , L−1, pattern _L (k)=δ·k.

As an optional embodiment, the method also includes:

When k=0,1,2,...,L-1, pattern _L (k)=pattern _L ((k+q)modL)';

As an optional embodiment, the symbol position of the i-th subsequence is l' _start + pattern _L (i),

As an optional embodiment, when i=0,1,2,...,L-1, pattern _L (i) takes the value of 0,δ',2δ',...,(L-1)·δ' The i-th element in the third arrangement of ; when i=L, L+1,...,P-1, the value of pattern _L (i) is pattern _L (imodL).

As an optional embodiment, when i=0, 1, 2, . . . , L−1, pattern _L (i)=i·δ′.

As an optional embodiment, the method also includes:

When i=0,1,2,...,L-1, pattern _L (i)=pattern _L ((i+q')modL)';

As an optional embodiment, the transceiving unit 810 is further configured to: send configuration information, the configuration information is used to indicate the first frequency domain interval, l _start , l' _start , L, pattern _L (k), pattern _L At least one of (i), q, q', δ, δ', h ₁ or N.

In a possible implementation manner, the communication apparatus 800 may correspond to the second device in the above method embodiment, for example, may be the second device, or a chip configured in the second device. The communication apparatus 800 is configured to execute various steps or procedures corresponding to the second device in the above method.

Wherein, the transceiver unit 810 is configured to obtain a received signal of a reference signal on L symbols, the reference signal is generated according to a first sequence, the length of the first sequence is N, and the first sequence includes P subsequences, The first sequence includes P subsequences, each of the P subsequences includes one or more consecutive sequence elements, and the sequence elements of the same subsequence in the P subsequences are mapped to the same symbol, the The i-th subsequence and the i+1-th subsequence in the P sub-sequence are respectively mapped to the l _i -th symbol and the l _i+1 -th symbol in the L symbols, and l _i is different from l _i+1 , so There are at least two subsequences mapped on the same symbol in the P subsequences, and any adjacent sequence elements of the i-th subsequence are mapped to the elements included in the l _i -th symbol at equal intervals in the first frequency domain. On the subcarrier, the interval between the subcarrier mapped by the last sequence element of the ith subsequence and the subcarrier mapped by the first sequence element of the i+1th subsequence is the first frequency Domain interval, P is an integer greater than or equal to 3, i=0, 1, ..., P-1, the sum of the lengths of the P subsequences is N; the processing unit 820 is used to process the Receive signals for processing;

As an optional embodiment, when k=0, 1, 2, . . . , L−1, pattern _L (k)=δ·k.

As an optional embodiment, when k=0,1,2,...,L-1, pattern _L (k)=pattern _L ((k+q)modL)';

As an optional embodiment, when i=0,1,2,...,L-1, pattern _L (i)=pattern _L ((i+q')modL)';

As an optional embodiment, the transceiving unit 810 is configured to: receive configuration information, the configuration information is used to indicate the first frequency domain interval, l _start , l' _start , L, pattern _L (k), pattern _L ( At least one of i), q, q', δ, δ', h ₁ or N.

It should be understood that the communication device 800 here is embodied in the form of functional units. The term "unit" here may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor for executing one or more software or firmware programs (such as a shared processor, a dedicated processor, or a group processor, etc.) and memory, incorporated logic, and/or other suitable components to support the described functionality. In an optional example, those skilled in the art can understand that the communication device 800 may specifically be the first device in the above-mentioned embodiment, and may be used to execute various processes and/or steps corresponding to the first device in the above-mentioned method embodiment or, the communication device 800 may specifically be the second device in the above embodiment, so as to execute the various processes and/or steps corresponding to the second device in the above method embodiment, and to avoid repetition, details are not repeated here.

The communication device 800 of each solution above has the function of implementing the corresponding steps performed by the first device in the above method, or the communication device 800 of the above solutions has the function of realizing the corresponding steps performed by the second device in the above method. The functions described above may be implemented by hardware, or may be implemented by executing corresponding software on the hardware. The hardware or software includes one or more modules corresponding to the above-mentioned functions; for example, the communication unit can be replaced by a transceiver (for example, the sending unit in the communication unit can be replaced by a transmitter, and the receiving unit in the communication unit can be replaced by a receiver computer), and other units, such as a processing unit, may be replaced by a processor to respectively perform the sending and receiving operations and related processing operations in each method embodiment.

In addition, the above-mentioned communication unit may also be a transceiver circuit (for example, may include a receiving circuit and a sending circuit), and the processing unit may be a processing circuit. In the embodiment of the present application, the communication device in FIG. 8 may be the first device or the second device in the foregoing embodiments, or may be a chip or a chip system, for example, a system on chip (system on chip, SoC). Wherein, the communication unit may be an input-output circuit or a communication interface; the processing unit is a processor or a microprocessor or an integrated circuit integrated on the chip. It is not limited here.

FIG. 9 shows a communication device 900 provided by an embodiment of the present application. The communication device 900 includes a processor 910 and a transceiver 920 . Wherein, the processor 910 and the transceiver 920 communicate with each other through an internal connection path, and the processor 910 is used to execute instructions to control the transceiver 920 to send signals and/or receive signals.

Optionally, the communication device 900 may further include a memory 930, and the memory 930 communicates with the processor 910 and the transceiver 920 through an internal connection path. The memory 930 is used to store instructions, and the processor 910 can execute the instructions stored in the memory 930 . In a possible implementation manner, the communication apparatus 900 is configured to implement various processes and steps corresponding to the first device in the foregoing method embodiments. In a possible implementation manner, the communication apparatus 900 is configured to implement various processes and steps corresponding to the second device in the foregoing method embodiments.

It should be understood that the communications apparatus 900 may specifically be the first device or the second device in the foregoing embodiments, or may be a chip or a chip system. Correspondingly, the transceiver 920 may be a transceiver circuit of the chip, which is not limited here. Specifically, the communication apparatus 900 may be configured to execute various steps and/or processes corresponding to the first device or the second device in the foregoing method embodiments. Optionally, the memory 930 may include read-only memory and random-access memory, and provides instructions and data to the processor. A portion of the memory may also include non-volatile random access memory. For example, the memory may also store device type information. The processor 910 can be used to execute the instructions stored in the memory, and when the processor 910 executes the instructions stored in the memory, the processor 910 can be used to execute the above method embodiment corresponding to the first device or the second device. individual steps and/or processes.

In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in a processor or an instruction in the form of software. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware. To avoid repetition, no detailed description is given here.

It should be noted that the processor in the embodiment of the present application may be an integrated circuit chip, which has a signal processing capability. In the implementation process, each step of the above-mentioned method embodiments may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software. The above-mentioned processor may be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components . Various methods, steps, and logic block diagrams disclosed in the embodiments of the present application may be implemented or executed. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories. Among them, the non-volatile memory can be read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically programmable Erases programmable read-only memory (electrically EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (RAM), which acts as external cache memory. By way of illustration and not limitation, many forms of RAM are available such as static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM ) and direct memory bus random access memory (direct rambus RAM, DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but not be limited to, these and any other suitable types of memory.

According to the methods provided in the embodiments of the present application, the present application also provides a computer program product, the computer program product including: computer program code, when the computer program code is run on the computer, the computer is made to execute the first step in the above method embodiments Various steps or processes executed by a device or a second device.

According to the methods provided in the embodiments of the present application, the present application also provides a computer-readable storage medium, the computer-readable storage medium stores program codes, and when the program codes are run on a computer, the computer is made to execute the above-mentioned method embodiments Various steps or processes performed by the first device or the second device.

According to the method provided in the embodiment of the present application, the present application further provides a communication system, which includes the foregoing first device and the second device.

The above communication device embodiments correspond completely to the method embodiments, and the corresponding steps are executed by corresponding modules or units, for example, the communication unit (transceiver) executes the steps of receiving or sending in the method embodiments, except for sending and receiving The other steps may be performed by a processing unit (processor). The functions of the specific units may be based on the corresponding method embodiments. Wherein, there may be one or more processors.

In the embodiments of the present application, each term and English abbreviation are illustrative examples given for the convenience of description, and should not constitute any limitation to the present application. This application does not exclude the possibility of defining other terms that can achieve the same or similar functions in existing or future agreements.

It should be understood that "and/or" in this article describes the association relationship of associated objects, indicating that there may be three relationships, for example, A and/or B may mean: A exists alone, A and B exist simultaneously, and B exists alone case, where A, B can be singular or plural. The character "/" generally indicates that the contextual objects are an "or" relationship.

Those of ordinary skill in the art can appreciate that various illustrative logical blocks (illustrative logical blocks) and steps (steps) described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, or a combination of computer software and electronic hardware. accomplish. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, communication device and unit described above can be based on the corresponding process in the foregoing method embodiments, and will not be repeated here.

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

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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

In the above embodiments, the functions of each functional unit may be fully or partially implemented by software, hardware, firmware or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions (programs). When the computer program instructions (program) are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable communication device. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server, or data center by wired (eg, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media. The available medium may be a magnetic medium (such as a floppy disk, a hard disk, or a magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (solid state disk, SSD)), etc.

If the functions are realized in the form of software function 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 is essentially 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, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disc and other media that can store program codes. .

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be determined by the protection scope of the claims.

Claims

A method for transmitting sequences, characterized in that the method comprises:

Generate a first sequence X(k) of length N, k=0,1,...,N-1;

The first sequence is sent on L symbols, the first sequence includes P subsequences, each subsequence in the P subsequences includes one or more consecutive sequence elements, and the same subsequence in the P subsequences The sequence elements of the sequence are mapped on the same symbol, and the i-th subsequence and the i+1th subsequence in the P subsequences are respectively mapped to the l i -th symbol and the l i+1 -th symbol in the L symbols above, l i is different from l i+1 , there are at least two sub-sequences mapped on the same symbol in the P sub-sequences, and any adjacent sequence elements of the i-th sub-sequence are equally spaced according to the first frequency domain interval is mapped to the subcarrier included in the l i th symbol, the subcarrier mapped to the last sequence element of the i th subsequence is mapped to the subcarrier mapped to the first sequence element of the i+1 th subsequence The interval between subcarriers is the first frequency domain interval, and the sum of the lengths of the P subsequences is N;

Wherein, N is an integer greater than 1, L is a positive integer greater than 1, P is an integer greater than or equal to 3, and i=0, 1, ..., P-1.
A method for transmitting sequences, characterized in that the method further comprises:

Obtain the received signal of the reference signal on L symbols, the reference signal is generated according to the first sequence, the length of the first sequence is N, the first sequence includes P subsequences, and the first sequence includes P subsequences, each subsequence in the P subsequences includes one or more continuous sequence elements, the sequence elements of the same subsequence in the P subsequences are mapped on the same symbol, and the i-th subsequence in the P subsequences The sequence and the i+1th subsequence are respectively mapped to the l ith symbol and the l i+ 1th symbol in the L symbols, l i is different from l i+1 , and there is at least one of the P subsequences Two subsequences are mapped on the same symbol, and any adjacent sequence elements of the ith subsequence are mapped to the subcarriers included in the l ith symbol at equal intervals in the first frequency domain, and the ith subsequence The interval between the subcarrier mapped by the last sequence element of the i subsequence and the subcarrier mapped by the first sequence element of the i+1th subsequence is the first frequency domain interval, and P is greater than or An integer equal to 3, i=0, 1, ..., P-1, the sum of the lengths of the P subsequences is N;

processing the received signal according to the first sequence;

Wherein, N is an integer greater than 1, L is a positive integer greater than 1, P is an integer greater than or equal to 3, and i=0, 1, ..., P-1.
The method according to claim 1 or 2, characterized in that, the lengths of each subsequence in the first P-1 subsequences among the P subsequences are all equal to h 1 , and the last of the P subsequences The length of the subsequence is h 2 , h 1 and h 2 are the same or different, (P-1)·h 1 +h 2 =N, h 1 and h 2 are positive integers greater than or equal to 1.
The method according to any one of claims 1 to 3, characterized in that, P=N, and each subsequence in the P subsequences consists of a sequence element.
The method according to any one of claims 1 to 4, wherein the symbol position of the sequence element X (k) mapping is l start + pattern L (k),

Among them, l start is the starting position of the time domain symbol, pattern L (k) is the symbol offset of the symbol mapped by the sequence element X(k) relative to l start , and the value of pattern L (k) is 0, δ, 2δ,...,(L-1)·δ, where δ is a positive integer greater than or equal to 1.
The method according to claim 5, characterized in that, when k=0,1,2,...,L-1, the value of pattern L (k) is 0,δ,2δ,...,(L-1) ·The kth element in the first arrangement composed of δ; when k=L, L+1,...,N-1, the value of pattern L (k) is pattern L (k mod L).
The method according to claim 6, characterized in that, when k=0, 1, 2, . . . , L-1, pattern L (k)=δ·k.
A method according to any one of claims 5 to 7, wherein

When k=0,1,2,...,L-1, pattern L (k)=pattern L ((k+q)mod L)';

Among them, the value of q is 0, 1, ..., the value in L-1, pattern L (k)' is the symbol offset of the sequence element X(k) mapping relative to l start predefined symbol, pattern L (k)' takes the value of the kth element in the second arrangement composed of 0, δ, 2δ, ..., (L-1)·δ.
The method according to any one of claims 1 to 4, wherein the symbol position of the ith subsequence is l' start +pattern L (i),

Wherein, l' start is the start position of the time domain symbol, pattern L (i) is the symbol offset of the symbol mapped to the i-th subsequence relative to l' start , and the value of pattern L (i) is 0, δ', 2δ',...,(L-1)·δ', where δ' is a positive integer greater than or equal to 1.
The method according to claim 9, characterized in that, when i=0,1,2,...,L-1, the value of pattern L (i) is 0, δ', 2δ',..., (L- 1) The ith element in the third arrangement composed of ·δ'; when i=L, L+1,...,P-1, the value of pattern L (i) is pattern L (i mod L).
The method according to claim 10, characterized in that, when i=0, 1, 2, . . . , L-1, pattern L (i)=i·δ'.
A method according to any one of claims 9 to 11, characterized in that,

When i=0,1,2,...,L-1, pattern L (i)=pattern L ((i+q')mod L)';

Wherein, the value of q' is 0, 1, ..., the value in L-1, pattern L (i) is the symbol offset of the symbol of the i-th subsequence relative to l' start predefined, pattern L (i)' is the i-th element in the fourth arrangement composed of 0, δ', 2δ', ..., (L-1)·δ'.
The method according to any one of claims 1 to 12, further comprising:

sending configuration information, the configuration information is used to indicate the first frequency domain interval, l start , l' start , L, pattern L (k), pattern L (i), q, q', δ, δ', h 1 or at least one of N.
The method according to any one of claims 1 to 12, further comprising:

receiving configuration information, the configuration information is used to indicate the first frequency domain interval, l start , l' start , L, pattern L (k), pattern L (i), q, q', δ, δ', h 1 or at least one of N.
A communication device, characterized in that it includes a processor and a memory, the processor is coupled to the memory, the memory is used to store computer programs or instructions, and the processor is used to execute the computer programs or instructions in the memory, causing the method of any one of claims 1 to 14 to be performed.
A computer-readable storage medium, characterized by storing programs or instructions for implementing the method according to any one of claims 1 to 14.