WO2020220176A1

WO2020220176A1 - Communication method and apparatus

Info

Publication number: WO2020220176A1
Application number: PCT/CN2019/084864
Authority: WO
Inventors: 位祎; 李雪茹; 曲秉玉; 周永行
Original assignee: 华为技术有限公司
Priority date: 2019-04-28
Filing date: 2019-04-28
Publication date: 2020-11-05
Also published as: WO2020220475A1; CN114026932A

Abstract

The present application provides a communication method and apparatus, being able to increase the number of roots used within each cell, and reduce the interference from different terminal devices of the same cell when sending a reference signal sequence. Said method can be applied to a communication system, such as, V2X, LTE-V, V2V, MTC, IoT, LTE-M, M2M, etc. Said method comprises: acquiring a reference signal sequence having a length of M, and sending the reference signal sequence to a network device. The reference signal sequence is determined by a first base sequence having a length of M and belonging to a first sequence set, and the number of base sequences having a length of M in the first sequence set is X. The X base sequences are determined by X ZC sequences having a length of N. The roots of the ZC sequences corresponding to any two base sequences are respectively q₁ and (q₁+V₁)mod N, q₁ being an integer from 1 to N-1, and V₁ being an integer. When N is an odd number, the value range of an absolute value of V₁ does not include 1, (I), (II) and N-1. When N is an even number, the value range of an absolute value of V₁ does not include 1, (1) and N-1.

Description

Communication method and device

Technical field

This application relates to the field of communications, in particular to communication methods and devices in the field of communications.

Background technique

In systems such as long term evolution (LTE) and new radio (NR), uplink reference signals, such as uplink demodulation reference signal (DMRS) and uplink sounding reference signal (SRS) ) And the sequence of the random access preamble signal are both generated based on the base sequence. The base sequence may be generated according to the ZC (Zadoff-Chu) sequence. For example, the base sequence may be the ZC sequence itself, or the base sequence may be a sequence generated by the ZC sequence through cyclic expansion or interception. In a possible design, a ZC sequence of length N can be expressed as: z _q (n),n=0,1,...,N-1, then a sequence of length M generated from the ZC sequence It can be expressed as: z _q (m mod N), m=0,1,...,M-1. Among them, the ZC sequence of length N can be expressed in the following form:

Among them, N is the length of the ZC sequence, which is an integer greater than 1; q is the root of the ZC sequence, which is a natural number that is relatively prime to N, and 0<q<N. This article defines the reference sequence generated from the ZC sequence as the base sequence as

Where q is the root of the ZC sequence, and α is the value determined by the time domain cyclic shift.

As an example, the upstream sounding reference signal is SRS, and the terminal device needs to determine the SRS sequence according to the base sequence before sending the SRS. In the 3rd generation partnership project (3GPP) standard, the length M of a variety of SRS sequences is given, and for the value of M greater than or equal to 72, 60 base sequences are defined respectively. These 60 The base sequence is generated from ZC sequences with the same length and different roots. Further, the 60 base sequences are divided into 30 sequence groups, and the base sequences of different sequence groups can be allocated to different cells. Taking M=72 as an example, what generates 30 groups of base sequences is a ZC sequence of length 71. The relationship between the roots of these ZC sequences and the group numbers of the base sequences can be shown in Table 1:

Table I

When the length of the base sequence is greater than 60, each cell can allocate two base sequences of the same length to the terminal equipment to generate the final transmitted SRS sequence. In a cell, each terminal device that transmits an SRS sequence of the same length on the same time-frequency resource uses the SRS sequence generated by the same base sequence in the group. When the same base sequence is used to generate the SRS sequence, these terminal devices obtain orthogonality between the SRS sequences by using different time-domain cyclic shifts and/or time-frequency domain resources. In the actual system, two base sequences with the same length in the same group are used as hopping sequences, that is, at different moments, the base sequence used by a terminal device can be designed between the two base sequences in this group. The pattern of is hopping, and its purpose is to randomize inter-cell interference. In the sequence hopping process, on the same time-frequency resource, all terminal devices in a cell that send the same length SRS sequence still use the same base sequence to generate the SRS sequence. Therefore, in the current system, on the same time-frequency resource, there is only one available root for the SRS sequence of a cell. However, the number of terminal devices in each cell is large (for example, 200), and the number of time-domain cyclic shifts that can obtain good orthogonality in the actual system and the number of available time-frequency domain resources are very limited. .

Therefore, the current number of available SRS sequences in a cell is far from sufficient for the huge number of terminal devices. This leads to the need to allow different terminal devices to send SRS in turn in a time division manner, resulting in a larger SRS cycle (for example, 20 ms). However, the channel has time-varying characteristics, and the large SRS period causes the channel state information obtained through SRS to be easily outdated. The channel state information during downlink data transmission is very different from the channel state information measured by the previous SRS, which seriously affects the system Performance.

Summary of the invention

The present application provides a communication method and device that can reduce the interference of different terminal devices in the same cell when transmitting SRS sequences on the basis of increasing the number of roots used in each cell, and improve system performance.

In a first aspect, a communication method is provided, including: obtaining a reference signal sequence of length M, where M is an integer greater than 1, sending the reference signal sequence to a network device; wherein, the reference signal sequence is composed of The first base sequence of M is determined, the first base sequence belongs to the first sequence group, the number of base sequences of length M in the first sequence group is X, and the X base sequences have the same group Index, the X base sequences are determined by X ZC sequences of length N, N is an integer greater than 1, X is an integer greater than or equal to 2, and any two base sequences in the X base sequences correspond to The roots of the ZC sequence of are q ₁ and (q ₁ +V ₁ )mod N, q ₁ is an integer from 1 to N-1, V ₁ is an integer, and the absolute value of V ₁ ranges from [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ], K ₁ , K ₂ , K ₃ and K ₄ are all integers, K ₁ >1,

K ₄ <N-1, when N is an odd number,

When N is even,

Represents the largest integer less than or equal to A, [A, B] represents a set of integers greater than or equal to A and less than or equal to B, and A mod B represents that A modulates B.

In the communication method provided by the embodiments of the present application, when a sequence group includes at least two base sequences of the same length, different terminal devices in the same cell can use at least two base sequences of the same length in the sequence group. Determine the reference signal sequence, and send the reference signal sequence on the same time-frequency resource, so that in the cell corresponding to the sequence group, the number of terminal devices that can simultaneously send reference signals of the same length at the same frequency increases, increasing the number of reference signals The number of sequences can also ensure that the interference power between the reference signal sequences is very low, which is beneficial to improve the accuracy of channel measurement by the network equipment based on the reference signal.

In the embodiment of this application, the value range of the absolute value of V ₁ is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ], K ₁ >1,

K ₄ <N-1, when N is an odd number,

When N is even,

Not only can the interference power between the reference signal sequences generated based on any two base sequences in the same sequence group and any cyclic shift value be sufficiently low, for example, the sequence generated by the base sequences r ₁ (m) and α ₁

And the sequence generated by the base sequence r ₂ (m) and α ₂

The interference power is low enough, and it can make multiple reference signal sequences generated by the same base sequence and multiple cyclic shift values to generate the reference signal sequence generated by another base sequence and any cyclic shift value. The total interference power is sufficiently low, for example, f reference signal sequences generated from the base sequence r ₁ (m) and f different cyclic shift values α ₁ , α ₂ ,..., α _f

For the reference signal sequence generated by the base sequence r ₂ (m) and the cyclic shift value α

The total interference power generated is small enough, where f is a positive integer greater than or equal to 1. Optionally, the total interference here refers to the expected value or variance value or instantaneous value of the total interference power, which is not limited. In this way, different terminal devices in the same cell can use different base sequences in the sequence group corresponding to the cell to generate their respective reference signal sequences, and can send them on the same time-frequency resource.

With reference to the first aspect, in some implementations of the first aspect, before the terminal device acquires the reference signal sequence of length M, the method further includes: the terminal device receives configuration information sent by the network device, and according to the configuration information The first base sequence is determined, and the reference signal sequence is determined according to the first base sequence.

The embodiment of the present application defines the second sequence group as a set of all base sequences having the same group index (or cell index). Therefore, the above-mentioned first sequence group is a set of all or part of the base sequences in the second sequence group.

In a possible design, the first sequence group is the set of all base sequences in the second sequence group. In this case, the first sequence group is the second sequence group. Exemplarily, the configuration information may include first indication information and second indication information, where the first indication information is used to indicate the first sequence group; the second indication information is used to indicate the first sequence group in the first sequence group. Base sequence. The terminal device may receive the first indication information and the second indication information, and obtain a reference signal sequence of length M according to the first indication information and the second indication information.

In another possible design, the first sequence group is a collection of partial base sequences in the second sequence group. In this case, exemplarily, the foregoing configuration information may include first indication information, second indication information, and third indication information. The terminal device may obtain a reference signal sequence of length M according to the first indication information, the second indication information, and the third indication information. The terminal device can determine the final reference signal sequence according to the above three indication information in various ways. For example, the terminal device may determine the first sequence group through the first indication information and the third indication information, and then determine the first base sequence based on the above-mentioned first sequence group through the second indication information, thereby determining the reference according to the first base sequence Signal sequence. For another example, the terminal device may determine the potential multiple base sequences in the second sequence group through the first indication information and the second indication information, and then determine based on the first base sequence among the multiple base sequences through the third indication information, thereby The reference signal sequence is determined according to the first base sequence. The terminal device may also determine the first base sequence in other ways, which is not limited in this embodiment of the application.

With reference to the first aspect, in some implementations of the first aspect, the first sequence group belongs to Y sequence groups, and Y is an integer greater than or equal to 2; the y-th sequence group in the Y sequence groups The number of base sequences with length M is X ^(y) , and the X ^(y) base sequences with length M are determined by X ^(y) ZC sequences with length N, and X ^(y) is An integer greater than or equal to 2, the roots of the ZC sequence corresponding to any two of the base sequences of length M in the X ^(y) base sequences are q′ and (q′+V′) mod N, q′ is An integer from 1 to N-1, V'is an integer, and the range of the absolute value of V'is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ].

In this embodiment, each sequence group in the Y sequence groups includes at least two base sequences with a length of M, so that each cell corresponding to the Y sequence groups can simultaneously send terminals with the same length of reference signals The number of devices is at least doubled. While increasing the number of reference signal sequences, it can ensure that the interference power between the reference signal sequences generated by any two base sequences of the same length in the same sequence group is very low. , The interference between reference signal sequences is much lower than that of the signal, which is conducive to flexible network planning and improves the accuracy of channel measurement of network equipment based on reference signal sequences.

With reference to the first aspect, in some implementations of the first aspect, when N is an odd number greater than or equal to the first threshold, the absolute value of V ₁ belongs to the set

Or, when N is an even number greater than or equal to the second threshold, the absolute value of V ₁ belongs to the set

Represents the smallest integer greater than or equal to A.

With reference to the first aspect, in some implementations of the first aspect, when N is an odd number greater than or equal to the first threshold, the absolute value of V′ belongs to the set

Or, when N is an even number greater than or equal to the second threshold, the absolute value of V'belongs to the set

Represents the smallest integer greater than or equal to A.

The first threshold and the second threshold may be the same or different, which is not limited in the embodiment of the present application. It should be understood that the foregoing first threshold may be determined by a network device, and the terminal device does not need to know the first threshold. In other words, the network device may determine the first threshold, and determine one or more values of the absolute value of V ₁ and/or the absolute value of V′ according to the first threshold and N, and the network device may determine the absolute value of V ₁ One or more values of the absolute value of V and/or the absolute value of V'are assigned to the terminal device, and the terminal device can be directly based on one or more of the absolute value of V ₁ and/or the absolute value of V'sent by the network device. Take a value, determine the base sequence, and then determine the reference signal sequence and send it. The second threshold is the same and will not be repeated here.

Optionally, the absolute value of V ₁ and/or the range of the absolute value of V'can be optimized for different β and different channel coherence bandwidths, so that under the frequency domain flatness of different channels, when there is When β terminal devices determine reference signal sequences based on the same base sequence of a sequence group and β different cyclic shift values, the interference power of these reference signal sequences to the reference signal sequence determined based on another base sequence of the sequence group Very low. At the same time, the embodiment of the present application does not increase the interference between the reference signal sequences determined based on the base sequences of different sequence groups.

With reference to the first aspect, in some implementations of the first aspect, X is an integer greater than or equal to 3, the X base sequences include three base sequences, and the roots of the ZC sequence corresponding to the three base sequences They are q ₂ , (q ₂ +V ₂ ) mod N and (q ₂ + W ₁ ) mod N respectively, where q ₂ is an integer from 1 to N-1, V ₂ is an integer, and the absolute value of V ₂ is The value range is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ], W ₁ is an integer, and the value range of the absolute value of W ₁ is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ].

It should be understood that the three base sequences in this embodiment may include at least one of the two base sequences in the foregoing embodiment, or may be other sequences different from the foregoing two base sequences, that is, q ₂ and q ₁ may be equal , It may not be equal, V ₂ and V ₁ may be equal or not, which is not limited in the embodiment of the present application.

In this embodiment, W ₁ may be determined according to V ₂ , or V ₂ may be determined according to W ₁ , or V ₂ and W ₁ may be independently designed values, and there is no clear and direct relationship between each other. This application The embodiment also does not limit this.

With reference to the first aspect, in some implementations of the first aspect, the relationship between V ₂ and W ₁ satisfies any one of the following formulas: W ₁ =-V ₂ , or W ₁ =(2×V ₂ )mod N .

With reference to the first aspect, in some implementations of the first aspect, X is an integer greater than or equal to 4, the X base sequences include four base sequences, and the roots of the ZC sequences corresponding to the four base sequences are respectively Is q ₃ , (q ₃ +V ₃ ) mod N, (q ₃ +W ₂ ) mod N, and (q ₃ +O ₁ ) mod N, where q ₃ is an integer from 1 to N-1, and V ₃ is Integer, and the value range of the absolute value of V ₃ is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ], W ₂ is an integer, and the value range of the absolute value of W ₂ is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ], O ₁ is an integer, and the range of the absolute value of O ₁ is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ].

It should be understood that the four base sequences in this embodiment may include at least one of the base sequences mentioned in the above-mentioned embodiments, or may be other sequences different from the above-mentioned base sequences, that is, q ₃ and q ₁ or q ₂ It can be equal or unequal. V ₃ and V ₁ or V ₂ can be equal or unequal. W ₂ and W ₁ can be equal or unequal, which is not limited in the embodiment of the application.

In this embodiment, W ₂ may be determined based on V ₃ , or V ₃ may be determined based on W ₂ , or V ₃ and W ₂ may be independently designed values, and there is no clear and direct relationship between each other. This application The embodiment also does not limit this. Similarly, O ₁ can be determined based on V ₃ , or V ₃ can be determined based on O ₁ , or V ₃ and O ₁ can be independently designed values, and there is no clear and direct relationship between them.

With reference to the first aspect, in some implementations of the first aspect, the relationship between V ₃ and W ₂ satisfies any one of the following formulas: W ₂ =-V ₃ , or W ₂ =(2×V ₃ )mod N Or, the relationship between V ₃ and O ₁ satisfies any one of the following formulas: O ₁ =(2×V ₃ ) mod N, or O ₁ =(3×V ₃ ) mod N.

With reference to the first aspect, in some implementations of the first aspect, X is an integer greater than or equal to 5, the X base sequences include five base sequences, and the five base sequences correspond to the roots of the ZC sequence They are q ₄ , (q ₄ +V ₄ )mod N, (q ₄ +W ₃ )mod N, (q ₄ +O ₂ )mod N and (q ₄ +P)mod N, where q ₄ is 1. An integer to N-1, V ₄ is an integer, and the range of the absolute value of V ₄ is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ], W ₃ is an integer, and the absolute value of W ₃ The value range of is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ], O ₂ is an integer, and the absolute value of O ₂ ranges from [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ], P is an integer, and the range of the absolute value of P is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ].

It should be understood that the five base sequences in this embodiment may include at least one of the base sequences already mentioned in the above-mentioned embodiment, or may be other sequences different from the above-mentioned base sequence, that is, q ₄ and q ₁ , q ₂ Or q ₃ can be equal or unequal, V ₄ and V ₁ , V ₂ or V ₃ can be equal or unequal, W ₃ and W ₁ or W ₂ can be equal or unequal, O ₂ and O ₁ may be equal or unequal, which is not limited in the embodiment of the present application.

In this embodiment, W ₃ may be determined according to V ₄ , or V ₄ may be determined according to W ₃ , or V ₄ and W ₃ may be independently designed values, and there is no clear and direct relationship between each other. This application The embodiment also does not limit this. Similarly, O ₂ can be determined based on V ₄ , or V ₄ can be determined based on O ₂ , or V ₄ and O ₂ can be independently designed values, and there is no clear and direct relationship between each other. Similarly, P can be determined based on V ₄ , or V ₄ can be determined based on P, or V ₄ and P can be independently designed values, and there is no clear and direct relationship between them.

With reference to the first aspect, in some implementations of the first aspect, the relationship between V ₄ and W ₃ satisfies any one of the following formulas: W ₃ =-V ₄ , or W ₃ =(2×V ₄ )mod N ; Or, the relationship between V ₄ and O ₂ satisfies any one of the following formulas: O ₂ =(2×V ₄ )mod N, or O ₂ =(3×V ₄ )mod N; Or, the relationship between V ₄ and P The relationship satisfies any one of the following formulas: P=(-2×V ₄ )mod N, P=(3×V ₄ )mod N, P=(4×V ₄ )mod N.

In a second aspect, another communication method is provided, including: sending configuration information, the configuration information is used to configure a first sequence group, the number of base sequences of length M in the first sequence group is X, so The X base sequences have the same group index, the X base sequences are determined by X ZC sequences of length N, N is an integer greater than 1, X is an integer greater than or equal to 2, and the X The roots of the ZC sequence corresponding to any two base sequences in the base sequence are q ₁ and (q ₁ +V ₁ ) mod N respectively, q ₁ is an integer from 1 to N-1, V ₁ is an integer, and the absolute value of V ₁ The value range is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ], K ₁ , K ₂ , K ₃ and K ₄ are all integers, K ₁ >1,

K ₄ <N-1, when N is an odd number,

When N is even,

Represents the largest integer less than or equal to A, [A, B] represents a collection of integers greater than or equal to A and less than or equal to B, A mod B represents A modulo B; receiving a reference signal sequence, the reference signal The sequence is determined by a first base sequence, and the first base sequence belongs to the first sequence group.

With reference to the second aspect, in some implementations of the second aspect, the first sequence group belongs to Y sequence groups, and Y is an integer greater than or equal to 2; the y-th sequence group in the Y sequence groups The number of base sequences with length M is X ^(y) , and the X ^(y) base sequences with length M are determined by X ^(y) ZC sequences with length N, and X ^(y) is An integer greater than or equal to 2, the roots of the ZC sequence corresponding to any two of the base sequences of length M in the X ^(y) base sequences are q′ and (q′+V′) mod N, q′ is An integer from 1 to N-1, V'is an integer, and the range of the absolute value of V'is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ].

With reference to the second aspect, in some implementations of the second aspect, when N is an odd number greater than or equal to the first threshold, the absolute value of V ₁ belongs to the set

Represents the smallest integer greater than or equal to A.

With reference to the second aspect, in some implementations of the second aspect, X is an integer greater than or equal to 3, the X base sequences include three base sequences, and the roots of the ZC sequence corresponding to the three base sequences They are q ₂ , (q ₂ +V ₂ ) mod N and (q ₂ + W ₁ ) mod N respectively, where q ₂ is an integer from 1 to N-1, V ₂ is an integer, and the absolute value of V ₂ is The value range is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ], W ₁ is an integer, and the value range of the absolute value of W ₁ is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ].

With reference to the second aspect, in some implementations of the second aspect, the relationship between V ₂ and W ₁ satisfies any one of the following formulas: W ₁ =-V ₂ , or W ₁ =(2×V ₂ )mod N .

With reference to the second aspect, in some implementations of the second aspect, X is an integer greater than or equal to 4, the X base sequences include four base sequences, and the roots of the ZC sequences corresponding to the four base sequences are respectively Is q ₃ , (q ₃ +V ₃ ) mod N, (q ₃ +W ₂ ) mod N, and (q ₃ +O ₁ ) mod N, where q ₃ is an integer from 1 to N-1, and V ₃ is Integer, and the value range of the absolute value of V ₃ is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ], W ₂ is an integer, and the value range of the absolute value of W ₂ is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ], O ₁ is an integer, and the range of the absolute value of O ₁ is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ].

With reference to the second aspect, in some implementations of the second aspect, the relationship between V ₃ and W ₂ satisfies any one of the following formulas: W ₂ =-V ₃ , or W ₂ =(2×V ₃ )mod N Or, the relationship between V ₃ and O ₁ satisfies any one of the following formulas: O ₁ =(2×V ₃ ) mod N, or O ₁ =(3×V ₃ ) mod N.

With reference to the second aspect, in some implementations of the second aspect, X is an integer greater than or equal to 5, the X base sequences include five base sequences, and the five base sequences correspond to the roots of the ZC sequence They are q ₄ , (q ₄ +V ₄ )mod N, (q ₄ +W ₃ )mod N, (q ₄ +O ₂ )mod N and (q ₄ +P)mod N, where q ₄ is 1. An integer to N-1, V ₄ is an integer, and the range of the absolute value of V ₄ is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ], W ₃ is an integer, and the absolute value of W ₃ The value range of is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ], O ₂ is an integer, and the absolute value of O ₂ ranges from [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ], P is an integer, and the range of the absolute value of P is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ].

With reference to the second aspect, in some implementations of the second aspect, the relationship between V ₄ and W ₃ satisfies any one of the following formulas: W ₃ =-V ₄ , or W ₃ =(2×V ₄ )mod N ; Or, the relationship between V ₄ and O ₂ satisfies any one of the following formulas: O ₂ =(2×V ₄ )mod N, or O ₂ =(3×V ₄ )mod N; Or, the relationship between V ₄ and P The relationship satisfies any one of the following formulas: P=(-2×V ₄ )mod N, P=(3×V ₄ )mod N, P=(4×V ₄ )mod N.

In a third aspect, a device is provided for executing the above-mentioned aspects or methods in any possible implementation manners of the aspects. Specifically, the device includes a unit for executing the foregoing aspects or methods in any possible implementation manners of the aspects. In a design, the device may include modules that perform one-to-one correspondence of the methods/operations/steps/actions described in the above aspects. The modules may be hardware circuits, software, or hardware circuits combined with software. .

In a fourth aspect, a device is provided, which includes a communication interface, a memory, and a processor. Wherein, the processor is configured to implement the foregoing aspects or methods in any possible implementation manner of each aspect, and the memory is coupled with the processor. Optionally, the communication interface, the memory, and the processor communicate with each other through an internal connection path, the memory is used to store instructions, and the processor is used to execute the instructions stored in the memory, so as to implement the foregoing aspects or any possible aspects of each aspect. The method in the implementation mode.

In a fifth aspect, a system is provided. The system includes a device for implementing any one of the foregoing first aspect or the first aspect, and a device for implementing any one of the foregoing second or second aspects. A possible method of implementation; or the system includes a device for implementing the third aspect or any of the possible methods of the third aspect, and a device for implementing any of the fourth aspect or the fourth aspect Possible methods of implementation.

In one design, the system includes a device for implementing a method executed by a terminal device and a device for implementing a method executed by a network device.

In a sixth aspect, a computer program product is provided, the computer program product includes: computer program code, when the computer program code is run by a computer, the computer can execute each of the above aspects or any of the possibilities The method in the implementation mode.

In a seventh aspect, a computer-readable medium is provided for storing instructions that, when the instructions run on a computer, cause the computer to execute the above aspects or the methods in any possible implementation manners of the aspects Instructions.

In an eighth aspect, the embodiments of the present application provide a chip system, which includes one or more processors, configured to call and execute instructions stored in the memory from the memory, so that the above aspects or any of the above aspects The methods in one possible implementation are executed. The chip system can be composed of chips, or can include chips and other discrete devices.

Description of the drawings

Fig. 1 shows a schematic diagram of an application scenario of an embodiment of the present application.

Fig. 2 shows a schematic flowchart of a communication method according to an embodiment of the present application.

Figure 3 shows a schematic diagram of a sequence group in an embodiment of the present application.

Fig. 4 shows a schematic diagram of another sequence group in an embodiment of the present application.

Fig. 5 shows a schematic block diagram of a device according to an embodiment of the present application.

Fig. 6 shows a schematic block diagram of another apparatus according to an embodiment of the present application.

Fig. 7 shows a schematic block diagram of another apparatus according to an embodiment of the present application.

Detailed ways

The technical solution in this application will be described below in conjunction with the drawings.

The technical solutions of the embodiments of this application can be applied to various communication systems, such as: global system for mobile communications (GSM) system, code division multiple access (CDMA) system, broadband code division multiple access (wideband code division multiple access, WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE Time division duplex (TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, fifth generation (5G) System or New Radio (NR), etc.

The terminal device involved in the embodiments of the present application may be referred to as a terminal for short, which may be a device with a wireless transceiver function. The terminal can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; it can also be deployed on the water (such as a ship, etc.); it can also be deployed in the air (such as aeroplane, balloon, satellite, etc.). The terminal equipment may be user equipment (UE). UEs include handheld devices, vehicle-mounted devices, wearable devices, or computing devices with wireless communication functions. Exemplarily, the UE may be a mobile phone, a tablet computer, or a computer with wireless transceiver function. Terminal equipment can also be virtual reality (VR) terminal equipment, augmented reality (augmented reality, AR) terminal equipment, wireless terminals in industrial control, wireless terminals in unmanned driving, wireless terminals in telemedicine, and smart Wireless terminals in power grids, wireless terminals in smart cities, wireless terminals in smart homes, and so on. In the embodiments of the present application, the device used to implement the function of the terminal may be a terminal; it may also be a device capable of supporting the terminal to implement the function, such as a chip system, and the device may be installed in the terminal. In the embodiments of the present application, the chip system may be composed of chips, or may include chips and other discrete devices. In the technical solutions provided by the embodiments of the present application, the device used to implement the functions of the terminal is an example to describe the technical solutions provided by the embodiments of the present application.

The network device in the embodiment of the application may be a device used to communicate with a terminal device. The network device may be a global system for mobile communications (GSM) system or code division multiple access (CDMA) The base transceiver station (BTS) in the LTE system can also be the Node B (NodeB, NB) in the wideband code division multiple access (WCDMA) system, or the evolved Node B in the LTE system. (evolved NodeB, eNB or eNodeB), it can also be a wireless controller in the cloud radio access network (CRAN) scenario, or the network device can be a relay station, an access point, a vehicle-mounted device, or a wearable device As well as the network equipment in the future 5G network or the network equipment in the future evolved public land mobile network (PLMN), the embodiment of the present application is not limited. A base station may be a device that is deployed in a wireless access network and can communicate with a terminal wirelessly. Base stations may come in many forms, such as macro base stations, micro base stations, relay stations, and access points. Exemplarily, the base station involved in the embodiment of this application may be a base station in 5G or a base station in LTE, where the base station in 5G may also be called a transmission reception point (TRP) or gNB (generation NodeB) . In the embodiments of the present application, the device used to implement the function of the network device may be a network device; it may also be a device capable of supporting the network device to implement the function, such as a chip system, and the device may be installed in the network device. In the technical solutions provided by the embodiments of the present application, the device for implementing the functions of the network equipment is a network device as an example to describe the technical solutions provided by the embodiments of the present application.

In the embodiments of the present application, the terminal device or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also referred to as main memory). The operating system may be any one or more computer operating systems that implement business processing through processes, for example, Linux operating system, Unix operating system, Android operating system, iOS operating system, or windows operating system. The application layer includes applications such as browsers, address books, word processing software, and instant messaging software. In addition, the embodiments of the application do not specifically limit the specific structure of the execution subject of the methods provided in the embodiments of the application, as long as they can communicate according to the methods provided in the embodiments of the application, for example, the execution of the methods provided in the embodiments of the application The main body can be a terminal device or a network device, or a functional module that can execute a program in the terminal device or the network device.

In addition, various aspects or features of the embodiments of the present application may be implemented as methods, devices, or products using standard programming and/or engineering techniques. The term "article of manufacture" as used in this application encompasses a computer program accessible from any computer-readable device, carrier, or medium. For example, computer-readable media may include, but are not limited to: magnetic storage devices (for example, hard disks, floppy disks, or tapes, etc.), optical disks (for example, compact discs (CD), digital versatile discs (DVD)) Etc.), smart cards and flash memory devices (for example, erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.). In addition, various storage media described herein may represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, various other media capable of storing, containing, and/or carrying instructions and/or data.

Fig. 1 shows a communication system 100 to which an embodiment of the present application can be applied. The communication system 100 may include one or more network devices 110 and one or more terminal devices 120 located within the coverage area of the network device 110. Figure 1 exemplarily shows one network device and two terminal devices. Optionally, the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. The embodiment does not limit this.

Optionally, the wireless communication system 100 may also include other network entities such as a network controller and a mobility management entity, and the embodiment of the present application is not limited thereto.

For ease of understanding, the relevant terms involved in this application are first introduced below.

1. Base sequence (base sequence) and ZC sequence

The sequence of the uplink reference signal (such as DMRS, SRS) is generated based on the base sequence. For example, if the base sequence of length M is r(m), the sequence generated by the base sequence can be:

A·exp(jαm)r(m)

Among them, m=0,1,2,...,M-1, M is an integer greater than 1, A is a complex number, α is a real number determined by a time-domain cyclic shift (also called a cyclic shift value in this article), j Is an imaginary unit, exp represents an exponential function with e as the base.

The base sequence may be a sequence generated from the ZC sequence. For example, the base sequence may be the ZC sequence itself, or the base sequence may also be a sequence generated by the ZC sequence through cyclic shift expansion or interception. For example, a ZC sequence of length N is z _q (n), which can be expressed in the following form:

Among them, N is an integer greater than 1, q is the root of the ZC sequence (also called root index or root index), a natural number that is relatively prime to N, and 0<q<N.

In this article, define the reference sequence generated from the base sequence as

Among them, the root of the ZC sequence generating the base sequence is q, and α is a value determined according to the time domain cyclic shift, which is also called the cyclic shift value.

After obtaining the reference signal sequence, the terminal device can map the reference signal sequence of length M to M subcarriers in the order of subcarrier index from small to large (or from large to small), and then perform inverse Fourier on the frequency domain sequence Leaf transform (inverse fourier transform, IDFT) to obtain the corresponding time-domain sequence and send it to the network device.

2. Uplink reference signal

The uplink reference signal is the reference signal sent by the terminal equipment, for example, SRS, DMRS of the uplink control channel, discrete Fourier transform extended orthogonal frequency division multiplexing (discrete fourier transform-spread orthogonal frequency division multiplexing, DFT-s) -OFDM) DMRS of physical uplink shared channel (PUSCH) under waveform. The uplink reference signal can be used to obtain uplink channel state information, which can be used for demodulation and detection of uplink data. In a time division duplex (TDD) system, using channel disparity, uplink reference signals can also be used to obtain downlink channel state information. Taking SRS as an example, the network device obtains downlink channel state information by measuring the SRS sequence sent by the terminal device. The channel state information is used for precoding during downlink data transmission, determination of modulation and coding methods, and so on. Therefore, obtaining accurate channel state information based on the uplink reference signal is very important for the efficiency of uplink data transmission or downlink data transmission.

In the following, the SRS sequence is taken as an example for description. The design principles of other uplink reference signals are similar, and will not be repeated.

In the current system, SRS uses a sequence generated from a ZC sequence. On the same time-frequency resources, the roots of the ZC sequences used by all terminal devices in a cell are the same, and the orthogonality of the SRS sequences of different terminal devices can be obtained through different cyclic shifts and frequency domain resources.

In the 3rd generation partnership project (3GPP) standard, a variety of SRS sequence lengths are given, and for SRS sequence lengths greater than or equal to 72, 60 base sequences are defined respectively. The 60 base sequences are generated from ZC sequences with the same length and different roots. Further, the 60 base sequences are divided into 30 sequence groups, and the base sequences of different sequence groups can be allocated to different cells. The formula for determining root q currently defined by 3GPP is:

Among them, v=0 or 1, u=0,1,...,29. u is the group serial number, representing 30 groups, and each group has two root serial numbers, which are determined by v. u and v are configured for terminal equipment by sending configuration information through network equipment.

Taking M=72 as an example, the ZC sequence with length 71 is generated for 30 groups of base sequences. From the above formula, the roots of 30 ZC sequences in the case of u=0,1,...,29 and v=0 can be calculated , And the roots of the 30 ZC sequences when u=0,1,...,29 and v=1. The relationship between the root q of these 60 ZC sequences and the group number u of the base sequence can be shown in Table 1 below Show:

Table I

In the same cell, each terminal device that sends the same length of SRS sequence on the same time-frequency resource uses the same u and v, that is, the same cell sends the same length of SRS sequence on the same time-frequency resource Each terminal device in the group uses the SRS sequence generated by the same base sequence in the group. When the same base sequence is used to generate the SRS sequence, these terminal devices obtain the orthogonality between the SRS sequences by using different time-domain cyclic shifts. In the actual system, two base sequences with the same length in the same group are used as hopping sequences, that is, at different moments, the base sequence used by a terminal device can be designed between the two base sequences in this group. The pattern of hops, and the two base sequences in the group are used in turn, the purpose of which is to randomize inter-cell interference. In the sequence hopping process, at the same moment, all terminal devices in a cell that send the same length SRS sequence on the same time-frequency resource still use the same base sequence to generate the SRS sequence. Therefore, in the current system, there is only one available root for the SRS sequence of a cell on the same time-frequency resource.

However, the number of terminal devices in each cell is large (for example, 200), and the number of time-domain cyclic shifts that can obtain good orthogonality in the actual system and the number of available time-frequency domain resources are very limited. . Therefore, the current number of available SRS sequences in a cell is far from sufficient for the huge number of terminal devices. This leads to the need to allow different terminal devices to send SRS in turn in a time division manner, resulting in a larger SRS cycle (for example, 20 ms). However, the channel has time-varying characteristics, and the large SRS period causes the channel state information obtained through SRS to be easily outdated. The channel state information during downlink data transmission is very different from the channel state information measured by the previous SRS, which seriously affects the system Performance.

In order to improve the accuracy of channel state information and avoid serious channel state information obsolescence problems, one solution is to increase the number of roots used in each cell, so that each cell can support more terminal devices to send SRS sequences simultaneously . However, simply increasing the number of roots is likely to cause great interference between SRS sequences used by different terminal devices in the same cell.

In view of this, an embodiment of the present application proposes a method for increasing the number X of base sequences with the same length in the sequence group. The X base sequences with the same length are determined by the ZC sequences with different roots, X>1. The X base sequences in the sequence group can be allocated to different terminal devices in a cell for determining reference signals. The embodiments of the present application are beneficial to solve the problem of large interference between reference signal sequences determined by different base sequences when these different terminal devices transmit reference signals determined by the base sequences allocated to them on the same time-frequency resource. problem. The method in the embodiments of the present application can be applied not only to uplink reference signal sequences, but also to downlink reference signal sequences.

The method provided in the embodiments of this application can be applied to a variety of communication systems, such as vehicle to everything (V2X), long term evolution-vehicle (LTE-V) technology, and vehicle-to-vehicle (vehicle-to-vehicle). -to-vehicle, V2V), machine type communication (MTC), internet of things (IoT), long term evolution-metro (LTE-M), machine-to-machine (machine-to-machine) to machine, M2M) etc.

FIG. 2 shows a schematic flowchart of a communication method 200 according to an embodiment of the present application. The method 200 can be applied to the communication system 100 shown in FIG. 1, but the embodiment of the present application is not limited thereto.

S210: The terminal device obtains a reference signal sequence with a length of M, where M is an integer greater than 1.

S220: The terminal device sends the reference signal sequence to the network device; correspondingly, the network device receives the reference signal sequence.

Optionally, the foregoing method 200 further includes:

S230: The network device performs channel measurement according to the received reference signal sequence.

For example, the terminal device sends a reference signal sequence x(m) of length M, and the network device receives a signal y(m) containing the reference signal sequence x(m),

y(m)=h(m)x(m)+n(m), m=0,2,...M-1,

Among them, h(m) is channel information and n(m) is noise. In order to measure the channel information h(m), the network device can generate the reference signal sequence x(m) locally, and then obtain the estimated value of the channel information h(m) through the following operations

Among them, x ^* (m) is the conjugate of x (m). estimated value

It is the channel measurement value of the above-mentioned network equipment.

The aforementioned reference signal sequence is determined by the first base sequence of length M. The first base sequence belongs to the first sequence group, and the number of base sequences of length M in the first sequence group is X. The X base sequences have the same group index, and the X base sequences are determined by X ZC sequences of length N, where N is an integer greater than 1, and X is an integer greater than or equal to 2. The roots of the ZC sequence corresponding to any two of the X base sequences are q ₁ and (q ₁ +V ₁ ) mod N respectively. q ₁ is an integer from 1 to N-1, V ₁ is an integer, and the range of the absolute value of V ₁ is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ], K ₁ , K ₂ , K ₃ and K ₄ are both integers, K ₁ >1,

K ₄ <N-1. When N is odd,

When N is even,

Represents the largest integer less than or equal to A, [A,B] represents a set of integers greater than or equal to A and less than or equal to B, A mod B represents A modulo B, and the result is greater than or equal to zero and less than B Integer, ∪ represents the union.

It should be understood that the foregoing first sequence group may include base sequences of different lengths. In the above first sequence group, the number of base sequences of length M is X. Exemplarily, the first sequence group may also include X ₁ base sequences with a length of M ₁ and X ₂ base sequences with a length of M _2. M, M ₁ , and M _{2 are} not equal, and X, X ₁ , X ₂ can be equal or not equal.

In addition, in the first sequence group, the number of base sequences with a part length equal to 1, and the number of base sequences with another part length greater than 1. For example, in the first sequence group, the number of base sequences with a length of M ₃ Is X ₃ and the number of base sequences with length M ₄ is X ₄ , where X ₃ is equal to 1, and X _{4 is} greater than 1. Alternatively, in the first sequence group, the number of base sequences of each length is greater than 1, which is not limited in the embodiment of the present application.

Exemplarily, the foregoing first sequence group may be allocated by the network device to the terminal device through terminal device specific signaling (such as dedicated (dedicated) radio resource control (Radio Resource Control, RRC) signaling), or it may be Network equipment uses cell-level signaling (such as cell-specific RRC signaling, system information block (SIB) signaling, master information block (MIB) signaling, etc.) The base sequence of a sequence group is allocated to a plurality of terminal devices served by the network device, thereby being allocated to the terminal device. The embodiment of the present application is not limited to this, and will not be repeated here.

It should be noted that the purpose of allocating the above-mentioned first sequence group to the terminal device is to allocate a group of base sequences to the terminal device, and the group of base sequences represents the potential base sequence used by the terminal device to determine the reference signal sequence. Optionally, the terminal device may further use other configuration information to determine which base sequence in the first sequence group the reference signal sequence sent at a certain moment is determined based on.

It should be understood that the terminal device acquiring the reference signal sequence of length M may be the terminal device generating the reference signal sequence according to the first base sequence and a predefined rule, or the terminal device may obtain the pre-generated reference signal sequence by looking up the table. The application embodiment does not limit this.

The above-mentioned reference signal sequence is determined by the first base sequence of length M. It can be understood that the reference signal sequence may be generated from the first base sequence, or the reference signal sequence may be obtained by looking up the table according to the first base sequence of. In the same way, the above-mentioned first base sequence is determined by a ZC sequence of length N. It can be understood that the first base sequence may be generated from the ZC sequence, or the first base sequence may be a table lookup based on the ZC sequence. owned. The embodiments of this application do not limit this

In a possible design, the first base sequence is generated from the ZC sequence, and the reference signal sequence is generated from the first base sequence. Optionally, the terminal device may generate the reference signal sequence to be sent according to the base sequence (the first base sequence in this embodiment) among the aforementioned X base sequences according to predefined rules and/or other signaling configuration.

For example, the terminal device can obtain the group index or the cell index, the sequence index of the first base sequence, or the index of the root of the ZC sequence generating the first base sequence, and the ZC generating the first base sequence can be obtained through the following predefined formula The root q _{1 of the} sequence:

Among them, u is determined according to the group index or cell index, v is determined according to the index of the root. N is the length of the ZC sequence generating the first base sequence, and D is an integer greater than 1, for example, D=31.

The terminal device can use the root q ₁ and the following formula to generate the first base sequence r(m) of length M:

The terminal equipment uses the first base sequence r(m) and α to obtain the reference signal sequence x(m):

x(m)=Aexp(jαm)r(m)

Among them, A is a complex number, j is an imaginary unit, exp represents an exponential function with e as the base, α is a real number determined according to the cyclic shift value, and the cyclic shift value can be determined by the terminal device according to the configuration information of the network device, or Determined according to predefined rules.

It should be noted that, in this embodiment, the first sequence group allocated to the terminal device does not require the terminal device to store all X base sequences of the first sequence group according to the result of the allocation, but the terminal The device can generate the reference signal sequence to be sent according to the first base sequence among the X base sequences when needed according to predefined rules and/or other signaling configuration.

In another possible design, the first base sequence is obtained by looking up the table, and the reference signal sequence is generated from the first base sequence. In this way, the terminal device can directly store all the base sequences in the first sequence group generated in advance, and the correspondence between the base sequences and the respective ZC sequences (or roots of the ZC sequences). After the terminal device has determined the M and ZC sequence (or the root of the ZC sequence), it can directly determine the first base sequence by looking up the table. Further, the terminal device can generate the reference signal sequence through the first base sequence according to the above formula, which will not be repeated here.

In another possible design, the reference signal sequence is obtained by looking up the table. In this way, the terminal device can directly store multiple pre-generated reference signal sequences, and the correspondence between the reference signal sequence and the respective base sequence (or the ZC sequence corresponding to the base sequence, or the root of the ZC sequence corresponding to the base sequence), α relationship. After determining α and the first base sequence (or the ZC sequence corresponding to the first base sequence, or the root of the ZC sequence corresponding to the first base sequence), the terminal device can directly determine the reference signal sequence by looking up the table.

In the embodiment of the present application, the roots of the ZC sequence corresponding to any two of the X base sequences are q ₁ and (q ₁ +V ₁ ) mod N, which means that in the above X base sequences Here, two base sequences are arbitrarily selected, for example, the first base sequence and the second base sequence, q ₁ represents the root of the first ZC sequence generating the first base sequence, and (q ₁ +V ₁ ) mod N represents the second base sequence The root of the second ZC sequence of the sequence, using the above method to represent the roots of any two base sequences of ZC sequences, the absolute value of V ₁ ranges from [K ₁ ,K ₂ ]∪[K ₃ , K ₄ ]. It should be noted that the first base sequence and the second base sequence do not specify the sequence of the sequence.

In the embodiments of the present application, the ZC sequence corresponding to a base sequence refers to the ZC sequence that generates the base sequence. For example, the first base sequence corresponding to the first ZC sequence refers to the first ZC that generates the first base sequence. sequence. The "correspondence" in this article refers to the relationship in which the ZC sequence generates the base sequence. In addition, a base sequence is generated from a ZC sequence. That is, the above-mentioned X base sequences are generated from X length N ZC sequences, which means that the X base sequences are respectively generated from respective corresponding ZC sequences, and their respective corresponding ZC sequences are not the same. In other words, different base sequences are generated from ZC sequences with different roots.

K ₄ <N-1, when N is an odd number,

When N is even,

And the sequence generated by the base sequence r ₂ (m) and α ₂

Through the communication method provided by the embodiments of the present application, when a sequence group includes at least two base sequences of the same length, different terminal devices in the same cell can use at least two base sequences of the same length in the sequence group. The sequence determines the reference signal sequence, and transmits the reference signal on the same time-frequency resource, so that the number of terminal devices that can transmit reference signals of the same length at the same frequency increases, and the number of reference signal sequences can be increased while ensuring the reference The interference power between signal sequences is very low, which is beneficial to improve the accuracy of channel measurement by network equipment based on the reference signal.

It should be noted that when N is an odd number, the absolute value range of V ₁ in the embodiment of the present application does not include 1,

And N-1. If

N is an odd number, then the roots of the ZC sequences corresponding to the two base sequences in the first sequence group are q ₁ and

(q ₁ is an integer from 1 to N-1), the interference power between the two reference signal sequences generated by the two base sequences is very large. If the terminal device sends the reference signal sequence generated based on the above two base sequences on the same time-frequency resource, it will cause greater inter-sequence interference, which will cause serious distortion of the channel measurement result of the network device. Illustratively, suppose that N=191 and q ₁ =6, if

The roots are q ₁ =6 and

The two ZC sequences can generate two base sequences. After calculation, the interference power between the two reference signal sequences generated by these two base sequences is -7dB; if the absolute value of V ₁ belongs to the above set [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ], for example, V ₁ =67, two ZC sequences with roots of q ₁ =6 and roots of (q ₁ +67)mod191=73 can generate two base sequences, After calculation, the interference power between the two reference signal sequences generated by the two base sequences is -20dB, which is much smaller than the above-mentioned basis.

The interference power between the two generated reference signal sequences is -7dB.

Similarly, if V ₁ =1 and N is an odd number, the roots of the ZC sequences corresponding to two base sequences in the first sequence group are q ₁ and (q ₁ +1) mod N (q ₁ is 1 to N-1 integer), the interference power between the two reference signal sequences generated by the two base sequences is also very large, and will not be repeated here.

Similarly, if

(q ₁ is an integer from 1 to N-1), the interference power between the two reference signal sequences generated by the two base sequences is also very large, and will not be repeated here.

Similarly, if V ₁ =N-1 and N is an odd number, the roots of the ZC sequences corresponding to two base sequences in the first sequence group are q ₁ and (q ₁ +N-1) mod N(q ₁ is an integer from 1 to N-1), the interference power between the two reference signal sequences generated by the two base sequences is also very large, and will not be repeated here.

Similar to the above-mentioned case where N is an odd number, when N is an even number, the value range of the absolute value of V ₁ in the embodiment of the present application does not include 1,

N-1. If

If N is an even number, the roots of the ZC sequences corresponding to two base sequences in the first sequence group are q ₁ and

Similarly, if V ₁ =1 and N is an even number, the roots of the ZC sequences corresponding to the two base sequences in the first sequence group are q ₁ and (q ₁ +1) mod N (q ₁ is 1 to N-1 integer), the interference power between the two reference signal sequences generated by the two base sequences is also very large, and will not be repeated here.

If V ₁ =N-1 and N is an even number, then the roots of the ZC sequences corresponding to the two base sequences in the first sequence group are q ₁ and (q ₁ +N-1) mod N (q ₁ is 1 Integer to N-1), the interference power between the two reference signal sequences generated by the two base sequences is also very large, and will not be repeated here.

Optionally, in this embodiment, the first sequence group may be determined from Y sequence groups. The Y sequence groups have different sequence group indexes or cell indexes. The terminal device determines the first sequence group according to the group index or cell index indicated by the configuration information by receiving the configuration information, and then can determine a group of base sequences allocated to itself, and the group of base sequences may include base sequences of multiple lengths, Among them, the number of base sequences of length M is X.

Optionally, before the terminal device acquires the reference signal sequence of length M, the method 200 further includes:

S240: The network device sends configuration information to the terminal device, where the configuration information is used to configure the first sequence group. Correspondingly, the terminal device receives the configuration information, determines the first base sequence according to the configuration information, and determines the reference signal sequence according to the first base sequence.

It should be noted that the first instruction information and the second instruction information may be sent through the same instruction or through different instructions, which is not limited in the embodiment of the present application. In addition, the first indication information and/or the second indication information may be display configuration, for example, the first indication information indicates the group index of the first sequence group, and the second indication information indicates the base sequence index in the first sequence group; or The first indication information and/or the second indication information may also be implicitly obtained through the configuration of other information, which is not limited in the embodiment of the present application.

Exemplarily, the terminal device may obtain the sequence group index or the cell index of the second sequence group according to the first indication information. It is assumed that the second sequence group includes a sub-sequence group g ₀ and a sub-sequence group g ₁ , as shown in FIG. 3, In the second sequence group indicated by the first indication information, the roots of the ZC sequence corresponding to the base sequence of length M in the subsequence group g ₀ are ₀ , 0+V ₁ , 0+2×V ₁ , and the subsequence group The roots of the ZC sequence corresponding to the base sequence of length M in g ₁ are ₁ , 1+V ₁ , and 1+2×V _{1 respectively} . The third indication information is hopping sequence group indication information, and the terminal device may determine the first sequence group according to the third indication information. When the hopping sequence group indication information indicates that it is off, the first sequence group is the subsequence group g ₀ ; when the hopping sequence group indication information indicates that it is on, the first sequence group is the subsequence group g _n , where n belongs to the set {0,1 }, and the value of n will change according to the time unit of the hopping sequence pattern (such as sub-frames, symbols, etc.), that is, at different moments, the first sequence group indicated by the third indication information is in the sub-sequence group g _The hopping between ₀ and the sub-sequence group g ₁ is performed according to the designed pattern, and the purpose is to randomize the interference between cells. For example, at a certain moment, the first sequence group is the sub-sequence group g ₀ , then the interference of this cell to other cells is the interference caused by the reference signal generated by the base sequence in the sub-sequence group g ₀ to the signals of other cells. At another moment, the first sequence group is the sub-sequence group g ₁ , then the interference of this cell to other cells is the interference caused by the reference signal generated by the base sequence in the sub-sequence group g ₁ to the signals of other cells. Therefore, hopping The sequence group method can randomize the interference caused by the reference signal of the cell to the signals of other cells. In the sequence group hopping process, the terminal equipment in the same cell that transmits the reference signal sequence of the same length on the same time-frequency resource still uses the reference signal sequence generated by the base sequence in the same subsequence group. For a specific terminal device, the terminal device may obtain a base sequence in the sub-sequence group by receiving the second indication information. It should be noted that the second sequence group in this embodiment may or may not carry the index of the subsequence group.

Exemplarily, the terminal device may obtain the sequence group index or the cell index of the second sequence group according to the first indication information, assuming that the second sequence group includes a sub-sequence group g ₂ and a sub-sequence group g ₃ . The sub-sequence group g _{2 is} composed of base sequences that are already supported by the current standard (legacy). When M is greater than or equal to 60, the number of base sequences of length M is two, and these two base sequences are used for hopping sequences. G ₃ group sequence length M is the number of the base sequence of the X. As shown in FIG. 4, in the second sequence group indicated by the first indication information, the roots of the ZC sequence corresponding to the base sequence of length M in the subsequence group g ₂ are 0 and 1, respectively, and in the sub sequence group g ₃ The roots of the ZC sequence corresponding to the base sequence of length M are 0, 0+V ₁ , and 0+2×V _{1 respectively} . The third indication information is used to indicate which subsequence group to use, that is, the terminal device can determine the first sequence group according to the third indication information. For example, for terminal devices that cannot support the embodiments of the present application, such as release 15 (R15) and/or R16 terminal devices, the third indication information may indicate that such terminal devices adopt the sub-sequence group g ₂ . For terminal devices that can support the embodiments of the present application, such as R17 terminal devices, the third indication information may indicate that this type of terminal your device uses the sub-sequence group g ₃ . The foregoing two types of terminal devices can transmit reference signal sequences determined by the base sequences in the respective sequence groups on different time-frequency resources, without causing interference between each other. Multiple terminal devices that can support the embodiments of the present application can transmit reference signal sequences determined by different base sequences in the first sequence group on the same time-frequency resource, and the interference between each other is relatively small. Therefore, the application embodiment can support more terminal devices to send reference signals at the same frequency at the same time, and ensure that the reference signal interference between the terminal devices is small enough to ensure the channel measurement accuracy of this type of terminal device by the network device.

Optionally, the foregoing third indication information may use a separate field to display the configuration as a part of the reference signal resource configuration information; or, the third indication information may be bound to other information and be indicated in an implicit manner.

Optionally, the base sequences included in the sub-sequence group g ₀ and the sub-sequence group g ₁ may be completely different or partly the same. The base sequences included in the sub-sequence group g ₂ and the sub-sequence group g ₃ may be completely different or partly the same.

It should be noted that the first instruction information, the second instruction information, and the third instruction information may be sent through the same instruction or through different instructions, which is not limited in the embodiment of the present application.

In a possible implementation, the terminal device can substitute the parameters configured in the configuration information (for example, group index or cell index, hopping sequence group indicator parameters, etc.) into the reference signal sequence generation formula to obtain the assigned A set of base sequences, or the reference signal sequence can be obtained.

For example, the terminal device may obtain the root q of the ZC sequence corresponding to the first base sequence of the reference signal sequence through the following predefined formula:

Among them, u is determined according to the first indication information, f _s is determined according to the third indication information, v is determined according to the second indication information, N is the length of the ZC sequence that generates the first base sequence, and D It is an integer greater than 1, for example, D=31.

The terminal device can use the root q and the following formula to generate the first base sequence r(m) of length M:

r(m)=z _q (m mod N), m=0,1,...M-1;

x(m)=A·exp(jαm)r(m)

In a possible implementation manner, the terminal device can obtain a set of base sequences allocated to itself according to the predefined table and the above configuration information. For example, a predefined table defines one or more base sequences included in each sequence group, and the terminal device can learn the X base sequences through configuration information. For another example, a predefined table defines the roots of the ZC sequence that generates one or more base sequences of the sequence group included in each sequence group, and the terminal device can learn the ZC sequence that generates the X base sequences through configuration information The root. Exemplarily, the i-th base sequence r _i (m) in the X base sequences of the above-mentioned first sequence group is a ZC sequence whose length is N and the root index is q _i

The specific generating formula is:

Among them, i=0,1,...,X, m=0,1,...,M-1, n=0,1,...,N-1.

As an optional embodiment, the first sequence group belongs to Y sequence groups, and Y is an integer greater than or equal to 2; the y-th sequence group in the Y sequence groups has a base sequence of length M The number is X ^(y) , the X ^(y) base sequences of length M are determined by the ZC sequence of length N, X ^(y) is an integer greater than or equal to 2, the X ^(y) The roots of the ZC sequence corresponding to any two base sequences in a base sequence of length M are q′ and (q′+V′) mod N respectively, q′ is an integer from 1 to N-1, and V′ is an integer, And the value range of the absolute value of V'is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ].

The value of V'of different sequence groups in the above Y sequence groups may be the same or different, which is not limited in the embodiment of the application. In this embodiment, each sequence group in the Y sequence groups includes at least two base sequences with a length of M, so that each cell corresponding to the Y sequence groups can simultaneously send terminals with the same length of reference signals The number of devices is at least doubled. While increasing the number of reference signal sequences, it can ensure that the interference power between the reference signal sequences generated by any two base sequences of the same length in the same sequence group is very low. , The interference between reference signal sequences is much lower than that of the signal, which facilitates flexible network planning and improves the accuracy of channel measurement of network equipment based on reference signal sequences.

As an optional embodiment, when N is an odd number greater than or equal to the first threshold, the absolute value of V ₁ belongs to the set

Represents the smallest integer greater than or equal to A.

As an optional embodiment, when N is an odd number greater than or equal to the first threshold, the absolute value of V′ belongs to the set

Represents the smallest integer greater than or equal to A.

Exemplarily, the value of the first threshold and/or the second threshold may be any one of B ₁ , B ₂ or B ₃ , where the relationship between B ₁ , B ₂ or B ₃ and β satisfies the following table 2 At least one line in.

Table II

In this way, the absolute value of V ₁ and/or the range of the absolute value of V'can be optimized for different β and different channel coherence bandwidths, so that under the frequency domain flatness of different channels, when there are β When the terminal device determines the reference signal sequence based on the same base sequence of a sequence group and β different cyclic shift values, the interference power of these reference signal sequences to the reference signal sequence determined based on another base sequence of the sequence group is very low . At the same time, the embodiment of the present application does not increase the interference between the reference signal sequences determined based on the base sequences of different sequence groups.

Optionally, the coherence bandwidth corresponding to B ₁ , B ₂ or B ₃ is sequentially increased. The network device may determine to use the above B ₁ , B ₂ or B ₃ according to the coherent bandwidth. In one possible design, if the coherence bandwidth is about 3-5 resource blocks (resource block, RB), 6RB, 8RB or 10RB, the first threshold and/or the second threshold belong to B ₁ ; if the coherence bandwidth is about 6RB Or 12RB, the first threshold and/or the second threshold belong to B ₂ ; if the coherence bandwidth is about 12 RB or 24 RB, the first threshold and/or the second threshold belong to B ₃ .

Optionally, the network device may further combine the comb teeth and the coherent bandwidth to determine to use the foregoing B ₁ , B ₂ or B ₃ . Taking the SRS sequence as an example, in a possible design, when the SRS is mapped to frequency domain resources by comb 2 and the coherence bandwidth is about 3-5 RB, the first threshold and/or the second threshold belong to B ₁ ; if The coherence bandwidth is about 6RB, and the first threshold and/or the second threshold belong to B ₂ ; if the coherence bandwidth is about 12 RB, the first threshold and/or the second threshold belong to B ₃ . In another possible design, when the SRS is mapped to frequency domain resources with comb 4, if the coherence bandwidth is about 6RB, 8RB or 10RB, the first threshold and/or the second threshold belong to B ₁ ; if the coherence bandwidth is about If it is 12RB, the first threshold and/or the second threshold belong to B ₂ ; if the coherence bandwidth is about 24 RB, the first threshold and/or the second threshold belong to B ₃ .

Of course, the above is only an example, the above-described B1, B ₂ and B3 may correspond also to other coherent bandwidth and / or other comb teeth, are not repeated here.

It should be understood that, for ease of description, only the value range of the absolute value of V ₁ will be explained in detail below, and the value range of the absolute value of V′ is the same as the value range of the absolute value of V ₁ and will not be repeated.

Exemplarily, for different β and different coherence bandwidths, the value range of the absolute value of V ₁ may belong to the set A _{γ, β} , β=1, 2, 4, 8, γ=1 shown in Table 3 below. ,2,3,4. Among them, the set A _{γ, β} represents the set corresponding to the column γ and the row β.

Table Three

In this way, the absolute value range of V ₁ can be optimized for different β and different channel coherence bandwidths, so that under the flatness of the frequency domain of different channels, when there are β terminal devices based on a sequence group When the reference signal sequence is determined by the same base sequence and β different cyclic shift values, the interference power of these reference signal sequences to the reference signal sequence determined based on the other base sequence of the sequence group is very low. At the same time, the embodiment of the present application does not increase the interference between the reference signal sequences determined based on the base sequences of different sequence groups.

Optionally, the coherence bandwidths corresponding to A _1,β to A _4,β (βε{1,2,4,8}) increase sequentially. The network device can determine which set to use according to the coherent bandwidth. In a possible design, if the coherence bandwidth is about 3RB or 6RB, the absolute value of V ₁ belongs to A _1,β ; if the coherence bandwidth is about 4RB or 8RB, the absolute value of V ₁ belongs to A _2,β ; The bandwidth is about 5RB or 10RB, and the absolute value of V ₁ belongs to A _3,β ; if the coherence bandwidth is about 6RB or 12RB, the absolute value of V ₁ belongs to A _4,β .

Optionally, the network device may further combine comb teeth and coherent bandwidth to determine which set to use. Taking the SRS sequence as an example, in a possible design, when the SRS is mapped to frequency domain resources by comb 2 and the coherence bandwidth is about 3RB, the absolute value of V ₁ belongs to A _1,β ; if the coherence bandwidth is about The absolute value of 4RB, V ₁ belongs to A _2,β ; if the coherence bandwidth is about 5RB, the absolute value of V ₁ belongs to A _3,β ; if the coherence bandwidth is about 6RB, the absolute value of V ₁ belongs to A _4,β . In another possible design, when SRS is mapped to frequency domain resources with comb teeth, if the coherence bandwidth is about 6 RB, the absolute value of V ₁ belongs to A _1,β ; if the coherence bandwidth is about 8 RB, the value of V ₁ The absolute value belongs to A _2,β ; if the coherence bandwidth is about 10RB, the absolute value of V ₁ belongs to A _3,β ; if the coherence bandwidth is about 12RB, the absolute value of V ₁ belongs to A _4,β .

Of course, the above is only an example, and A _1,β to A _4,β (βε{1,2,4,8}) can also correspond to other coherence bandwidths and/or other comb teeth, which will not be repeated here.

It should be understood that the value range of the absolute value of V ₁ may be determined for at least one value of γ and/or at least one value of β. For example, the absolute value of V ₁

The value of can adopt any of the following schemes:

(1) Order

γ∈{1,2,3,4}.

This scheme is suitable for optimizing only for a certain coherent bandwidth. For example, the coherence bandwidth is about 4RB or 8RB, optimized according to γ=2, then

Different coherence bandwidths are suitable for different channel frequency selection characteristics. The larger the coherence bandwidth, the more suitable for channels that are flat in the frequency domain.

(2) Order

β∈{1,2,4,8}.

This scheme is suitable for optimizing only for a certain number of different reference signal sequences. For example, optimize according to β=2, then

(3) Order

β∈{1,2,4,8}, γ∈{1,2,3,4}.

This scheme is suitable for optimizing for a certain coherence bandwidth and a certain number of different reference signal sequences. For example, optimizing according to γ=2 and β=4, then

(4) Order

γ ₁ , γ ₂ ,..., γ _k ∈ {1,2,3,4} and γ ₁ , γ ₂ ,..., γ _{k are} different from each other, k is an integer and k≤4.

This scheme is suitable for joint optimization for several different coherent bandwidths. For example, for each sequence group, the selected

Therefore, the inter-sequence interference power of the two reference signal sequences determined by the root q ₁ and the root (q ₁ +V ₁ ) mod N is very low when the coherence bandwidth is 3RB and 4RB (or 6RB and 8RB).

(5) Order

β ₁ , β ₂ ,..., β _l ∈ {1,2,4,8} and β ₁ , β ₂ ,..., β _{l are} different from each other, l is an integer and l≤4.

This scheme is suitable for joint optimization for several different βs. For example, for each sequence group, the selected

Therefore, the interference power between the two reference signal sequences determined by the root q ₁ and the root (q ₁ +V ₁ ) mod N is very low in the two cases of β=1 and β=2.

As an optional embodiment, the root q _i of the ZC sequence of the i-th base sequence in the above X base sequences satisfies at least one of the following formulas:

Wherein, D is an integer greater than 1, for example, D=31. When the first sequence group is the second sequence group, f _s =0, or when the first sequence group only contains part of the base sequence in the second sequence group, f _s is determined according to the third indication information , integers greater than or equal to zero, v _i is the set _{C = {0, c 1,} ..., c X-1} elements, c _i is an integer. u is an integer determined according to the group index or cell index of the first sequence group or the second sequence group.

As an optional embodiment, when X is an integer greater than or equal to 2, |c _i |∈[K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ],i=1, 2,..., X-1. Alternatively, c _i is an integer determined according to V _1.

The characteristics of V ₁ are:

(1) V ₁ is an integer;

(2) There are different N, making the value of V ₁ different;

(3) For different u, the value of V ₁ can be the same or different;

(4) For different f _s , the value of V ₁ can be the same or different;

(5) There are N and u and f _s , so that the absolute value of V ₁ belongs to [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ]. When N is an odd number, K ₁ >1,

K ₄ <N-1; when N is an even number, K ₁ >1,

K ₄ <N-1.

When X is an integer greater than or equal to 2, the number of base sequences of length M in the first sequence group is greater than or equal to 2. For the convenience of description, take X=2 as an example for description. Let the two base sequences of length M in the first sequence group be the first base sequence and the second base sequence, respectively, and the root of the first ZC sequence used to generate the first base sequence is q ₁ , which is used to generate the first base sequence. The root of the second ZC sequence of the two base sequence is q ₂ , then in the above four formulas (1) to (4), at least one formula can be used to determine the root q _{1 of} the first ZC sequence and the second The root q _{2 of the} ZC sequence, where v ₁ =0,

D=31. Absolute value of V ₁

The value of can be divided into the following situations.

It should be noted that for any integer K, since

which is

When the root generated according to formula (1) (or other formulas) in the above four formulas, and

When the roots generated according to the above formula (1) (or other formulas) are equal. Therefore, for any integer E and any integer F, if E mod N = F mod N, then

versus

equivalence. Other subsequent embodiments (for example, V ₂ , V ₃ , V ₄ , W ₁ , W ₂ , W ₃ , O ₁ , O ₂ or P) have the same principle, and will not be repeated.

Situation One

For different N, the absolute value of V ₁

It may belong to the set A ₁ shown in Table 4 below, and the corresponding relationship between A ₁ and N satisfies at least one row in Table 4. Optionally, at least one of formulas (1) to (4) can be used to determine the root q _{1 of} the first ZC sequence and the root q _{2 of} the second ZC sequence.

Table Four

In the embodiment of this application, the design according to the above table

To determine q ₁ and q ₂ , under the frequency domain flatness of different channels, when β terminal devices determine the reference signal sequence based on the same base sequence of a sequence group and β different cyclic shift values, The sum of the interference power of these reference signal sequences to the reference signal determined based on another base sequence of the sequence group is very low. At the same time, this solution does not increase the interference between the reference signal sequences determined based on the base sequences of different sequence groups.

Optionally, this embodiment can be applied to different β values (for example, 1, 2, 4, 8) and different channel coherence bandwidths (for example, when the comb is 2, the coherence bandwidth is 4RB, 5RB, 6RB or 12RB ; Or, when the comb tooth is 4, the coherence bandwidth is 8RB, 10RB, 12RB or 24RB).

Situation two

For different N, the absolute value of V ₁

It may belong to the set A ₂ shown in Table 5 below, and the corresponding relationship between A ₂ and N satisfies at least one row in Table 5. Optionally, the root q _{1 of} the first ZC sequence and the root q _{2 of} the second ZC sequence may be determined according to formula (1).

Table 5

In the embodiment of this application, the design according to the above table

Situation three

For different N, the absolute value of V ₁

It can belong to the set A ₃ shown in the following table, and the corresponding relationship between A ₃ and N satisfies at least one row in Table 6. Optionally, the root q _{1 of} the first ZC sequence and the root q _{2 of} the second ZC sequence may be determined according to formula (3).

Table 6

In the embodiment of this application, the design according to the above table

Situation four

For different N, the absolute value of V ₁

It can belong to the set A ₄ shown in Table 7 below, and the corresponding relationship between A ₄ and N satisfies at least one row in Table 7. Optionally, at least one of formulas (1) to (4) can be used to determine the root q _{1 of} the first ZC sequence and the root q _{2 of} the second ZC sequence.

Table Seven

In the embodiment of this application, the design according to the above table

Optionally, this embodiment can be applied to different β values (for example, 1, 2, 4, 8) and different channel coherence bandwidths (for example, when the comb tooth is 2, the coherence bandwidth is 3RB, 4RB, 5RB, 6RB Or 12RB; or, when the comb tooth is 4, the coherence bandwidth is 6RB, 8RB, 10RB, 12RB or 24RB).

Situation five

For different N, the absolute value of V ₁

It may belong to the set A ₅ shown in Table 8 below, and the corresponding relationship between A ₅ and N satisfies at least one row in Table 8. Optionally, formula (3) may be used to determine the root q _{1 of} the first ZC sequence and the root q _{2 of} the second ZC sequence.

Table 8

In the embodiment of this application, the design according to the above table

Situation six

For different N, the absolute value of V ₁

It can be equal to A ₆ or A ₇ , and the corresponding relationship between A ₆ or A ₇ and N satisfies at least one row in Table 9. Optionally, formula (3) may be used to determine the root q _{1 of} the first ZC sequence and the root q _{2 of} the second ZC sequence.

Table 9

NN	A ₆ A ₆	A ₇ A ₇
113113	3131	1717
131131	33	4646
139139	3838	21twenty one
151151	44	5353
167167	7979	2525
179179	4949	2727
191191	3030	6767
199199	4444	3030
211211	100100	7474
227227	66	3434
239239	113113	3636
251251	119119	8888
263263	7272	9292

271271	7474	9595
283283	134134	9999
311311	148148	109109
317317	150150	127127
331331	4646	5050
359359	170170	3636
383383	138138	134134
389389	99	3939
401401	191191	4040
431431	1010	4343
449449	162162	4545
479479	131131	4848
503503	7070	5050
523523	248248	5252
547547	259259	5555
571571	272272	8686
619619	8686	248248
647647	1515	226226
661661	9292	231231
719719	1717	288288
761761	1818	7676
787787	284284	275275
811811	1919	8181
863863	2020	130130
911911	21twenty one	365365
953953	22twenty two	333333
997997	23twenty three	9999
10511051	501501	421421
11031103	2626	166166
11511151	2727	461461
12371237	2929	123123
12911291	3030	451451
13271327	3131	132132
14391439	3434	143143
15311531	3636	152152
15831583	3737	553553
16271627	3838	245245

In the embodiment of this application, the design according to the above table

Optionally, this embodiment can be applied to different β values (for example, 1, 2, 4, 8) and different channel coherence bandwidths (for example, when the comb is 2, the coherence bandwidth is 4RB, 5RB, 6RB or 12RB ; Or, when the comb tooth is 4, the coherence bandwidth is 8RB, 10RB, 12RB or 24RB). For example, for a scene with a comb tooth of 2 and a coherent bandwidth of 4RB, or a scene with a comb tooth of 4 and a coherent bandwidth of 8RB,

Belongs to A ₇ ; for other scenarios,

It can belong to A ₆ or A ₇ . Of course, the above is just an example, and A ₆ and A ₇ can also correspond to other coherence bandwidths and other β values, which will not be repeated here.

As an optional embodiment, X is an integer greater than or equal to 3, the X base sequences include three base sequences, and the roots of the ZC sequences corresponding to the three base sequences are q ₂ , (q ₂ +V ₂ )mod N and (q ₂ +W ₁ )mod N, where q ₂ is an integer from 1 to N-1, V ₂ is an integer, and the absolute value of V ₂ ranges from [K ₁ , K ₂ ]∪[K ₃ ,K ₄ ], W ₁ is an integer, and the range of the absolute value of W ₁ is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ].

As an optional embodiment, when X is an integer greater than or equal to 3, |c _i |∈[K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ],i=1, 2,..., X-1. Optionally, c _i is an integer determined according to V ₂ .

As an optional embodiment, the relationship between V ₂ and W ₁ satisfies any one of the following formulas: W ₁ =-V ₂ , or W ₁ =(2×V ₂ ) mod N.

The characteristics of V ₂ are:

(1) V ₂ is an integer;

(2) There are different N, which makes the value of V ₂ different;

(3) For different u, the value of V ₂ can be the same or different;

(4) There are N and u, so that the absolute value of V ₂ belongs to [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ].

The characteristics of W ₁ are:

(1) W ₁ is an integer;

(2) There are different N, which makes the value of W ₁ different;

(3) For different u, the value of W ₁ can be the same or different;

(4) There are N and u, so that the absolute value of W ₁ belongs to [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ].

When X is an integer greater than or equal to 3, the number of base sequences with a length of M in the first sequence group is greater than or equal to 3. For the convenience of description, take X=3 as an example. Assuming that the three base sequences include the two base sequences in the embodiment where X=2, the first base sequence, the second base sequence, and the third base sequence in the first sequence group are used to generate the first base sequence. The root of the first ZC sequence of the sequence is q ₁ , the root of the second ZC sequence used to generate the second base sequence is q ₂ , and the root of the third ZC sequence used to generate the third base sequence is q ₃ , Then in the above four formulas (1) ~ (4), i = 1, 2, 3, v1 = 0,

Or v ₁ =0,

when

When, W ₁ =-V ₂ ; when

When, W ₁ =(2×V ₂ )mod N. The absolute values of V ₂ and W ₁ can be divided into the following situations.

Situation One

For different absolute values of N and V ₂

It may belong to the set A ₈ or A ₉ shown in Table 10 below, and the correspondence between the set A ₈ or A ₉ and N satisfies at least one row in Table 10. Optionally, at least one formula in formulas (1) to (4) can be used to determine the root q ₁ of the first ZC sequence, the root q _{2 of} the second ZC sequence, and the root q _{2 of} the third ZC sequence. Root q ₃ , where i=1, 2, 3, v ₁ =0,

Or v ₁ =0,

Table 10

The union of the above set A ₈ and the set A ₉ can be referred to as A ₅₀ .

In the embodiment of this application, the design according to the above table

To determine q ₁ , q ₂ and q ₃ , it is possible to determine the reference signal based on the same base sequence of a sequence group and β different cyclic shift values under the frequency domain flatness of different channels when there are β terminal devices During the sequence, the sum of the interference power of these reference signal sequences to the reference signal determined based on the other base sequence of the sequence group is very low. At the same time, this solution does not increase the interference between the reference signal sequences determined based on the base sequences of different sequence groups.

Optionally, this embodiment can be applied to different β values (for example, 1, 2, 4, 8) and different channel coherence bandwidths (for example, when the comb is 2, the coherence bandwidth is 4RB, 5RB, 6RB or 12RB ; Or, when the comb tooth is 4, the coherence bandwidth is 8RB, 10RB, 12RB or 24RB). For example, for a scenario where β=1, 2 or 4,

Belongs to A ₈ ; for the scenario where β=8,

Belongs to A ₉ . Of course, the above is only an example, and A ₈ and A ₉ can also correspond to other β values, which will not be repeated here.

Situation two

For different absolute values of N and V ₂

It may belong to the set A ₁₀ or A ₁₁ shown in Table 11 below, and the correspondence between the set A ₁₀ or A ₁₁ and N satisfies at least one row in Table 11. Optionally, the root q ₁ of the first ZC sequence, the root q _{2 of} the second ZC sequence, and the root q _{3 of} the third ZC sequence may be determined according to formula (3), where i=1, 2, 3, v ₁ =0,

Table 11

In the embodiment of this application, the design according to the above table

Belongs to A ₁₀ ; for the scenario where β=8,

Belongs to A ₁₁ . Of course, the above is only an example, and A ₁₀ and A ₁₁ can also correspond to other β values, which will not be repeated here.

Situation three

For different absolute values of N and V ₂

It may belong to the set A ₁₂ or A ₁₃ shown in Table 12 below, and the correspondence between the set A ₁₂ or A ₁₃ and N satisfies at least one row in Table 12. Optionally, at least one formula in formulas (1) to (4) can be used to determine the root q ₁ of the first ZC sequence, the root q _{2 of} the second ZC sequence, and the root q _{2 of} the third ZC sequence. Root q ₃ , where i=1, 2, 3, v ₁ =0,

Or v ₁ =0,

Table 12

In the embodiment of this application, the design according to the above table

Optionally, this embodiment can be applied to different β values (for example, 1, 2, 4, 8) and different channel coherence bandwidths (for example, when the comb tooth is 2, the coherent bandwidth is 3RB; or, the comb tooth is At 4, the coherent bandwidth is 6RB). For example, for a scenario where β=1, 2 or 4,

Belongs to A ₁₂ ; for the scenario where β=8,

Belongs to A ₁₃ . Of course, the above is only an example, and A ₁₂ and A ₁₃ can also correspond to other β values, which will not be repeated here.

Situation four

For different absolute values of N and V ₂

It can be A ₁₄ or A ₁₅ , and the corresponding relationship between A ₁₄ or A ₁₅ and N satisfies at least one row in Table 13. The root q ₁ of the first ZC sequence, the root q _{2 of} the second ZC sequence, and the root q _{3 of} the third ZC sequence can be determined according to formula (3), where i=1, 2, 3, v ₁ = 0,

Table 13

NN	A ₁₄(β＝1,2,4) A ₁₄ (β＝1,2,4)	A ₁₅(β＝8) A ₁₅ (β=8)
113113	To	To
131131	1818	To
139139	1919	24twenty four
151151	21twenty one	21twenty one
167167	23twenty three	44
179179	6565	2525
191191	6969	2727
199199	1818	1414
211211	88	23twenty three
227227	3131	1616
239239	3333	4343
251251	3535	3535
263263	3636	2929
271271	3737	1919
283283	102102	44
311311	113113	1717
317317	115115	3232
331331	4646	4646
359359	4949	3939
383383	139139	21twenty one
389389	5454	3030
401401	5555	1111

431431	5959	66
449449	163163	100100
479479	174174	3737
503503	6969	5151
523523	7373	5353
547547	7575	88
571571	7878	88
619619	8585	3434
647647	235235	5050
661661	240240	5151
719719	261261	7373
761761	104104	1818
787787	109109	1212
811811	111111	1212
863863	118118	9595
911911	125125	22twenty two
953953	132132	1414
997997	362362	1414
10511051	144144	5050
11031103	151151	1616
11511151	418418	1717
12371237	449449	1818
12911291	177177	1818
13271327	182182	3131
14391439	197197	3434
15311531	210210	22twenty two
15831583	217217	3737
16271627	223223	24twenty four

In the embodiment of this application, the design according to the above table

Belongs to A ₁₀ ; for the scenario where β=8,

As an optional embodiment, X is an integer greater than or equal to 4, the X base sequences include four base sequences, and the roots of the ZC sequences corresponding to the four base sequences are q ₃ , (q ₃ + V ₃ )mod N, (q ₃ +W ₂ )mod N, and (q ₃ +O ₁ )mod N, where q ₃ is an integer from 1 to N-1, V ₃ is an integer, and the absolute value of V ₃ The value range of is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ], W ₂ is an integer, and the absolute value of W ₂ ranges from [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ], O ₁ is an integer, and the range of the absolute value of O ₁ is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ].

It should be understood that the four base sequences in this embodiment may include at least one of the base sequences mentioned in the above-mentioned embodiments, or may be other sequences different from the above-mentioned base sequences, that is, _q3 and _q1 or _q2 may be equal, It may also be unequal. V ₃ and V ₁ or V ₂ may be equal or unequal. W ₂ and W ₁ may be equal or unequal, which is not limited in the embodiment of the present application.

As an optional embodiment, when X is an integer greater than or equal to 4, |c _i |∈[K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ],i=1, 2,..., X-1. Optionally, c _i is an integer determined according to V ₃ .

As an optional embodiment, the relationship between V ₃ and W ₂ satisfies any one of the following formulas: W ₂ =-V ₃ , or W ₂ =(2×V ₃ ) mod N; or, V ₃ and O ₁ The relationship of satisfies any one of the following formulas: O ₁ =(2×V ₃ ) mod N, or O ₁ =(3×V ₃ ) mod N.

As an optional embodiment, W ₂ =-V ₃ , O ₁ = (2×V ₃ ) mod N; or, W ₂ = (2×V ₃ ) mod N, O ₁ = (3×V ₃ ) mod N.

The characteristics of V ₃ are:

(1) V ₃ is an integer;

(2) There are different N, making the value of V ₃ different;

(3) For different u, the value of V ₃ can be the same or different;

(4) There are N and u, so that the absolute value of V ₃ belongs to [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ].

The characteristics of W ₂ are:

(1) W ₂ is an integer;

(2) There are different N, making the value of W ₂ different;

(3) For different u, the value of W ₂ can be the same or different;

(4) There are N and u, so that the absolute value of W ₂ belongs to [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ].

O ₁ is characterized by:

(1) O ₁ is an integer;

(2) There are different N, which makes the value of O ₁ different;

(3) For different u, the value of O ₁ can be the same or different;

(4) There are N and u, so that the absolute value of O ₁ belongs to [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ].

When X is an integer greater than or equal to 4, the number of base sequences with a length of M in the first sequence group is greater than or equal to 4. For the convenience of description, X=4 is taken as an example for description. Assuming that the four base sequences include the three base sequences in the above-mentioned X=3 embodiment, the first base sequence, the second base sequence, the third base sequence, and the fourth base sequence in the first sequence group are used for The root of the first ZC sequence used to generate the first base sequence is q ₁ , the root of the second ZC sequence used to generate the second base sequence is q ₂ , the root of the third ZC sequence used to generate the third base sequence The root is q ₃ , and the root of the fourth ZC sequence used to generate the fourth base sequence is q ₄ , then in the above four formulas (1) ~ (4), i = 1, 2, 3, 4, v ₁ = 0,

At this time, W ₂ =-V ₃ , O ₁ = (2×V ₃ ) mod N; or, v ₁ =0,

At this time, W ₂ =(2×V ₃ ) mod N, O ₁ =(2×V ₃ ) mod N. Absolute value of V ₃

The value of can be divided into the following situations.

Situation One

For different absolute values of N and V ₃

It may belong to the set A ₁₆ , A ₁₇ or A ₁₈ shown in Table 14 below, and the correspondence between the set A ₁₆ , A ₁₇ or A ₁₈ and N satisfies at least one row in Table 14. Optionally, at least one formula in formulas (1) to (4) can be used to determine the root q ₁ of the first ZC sequence, the root q _{2 of} the second ZC sequence, and the root q ₂ of the third ZC sequence. Root q ₃ and the root q _{4 of} the fourth ZC sequence, where i=1, 2, 3, 4, v ₁ =0,

W ₂ =-V ₃ , O ₁ = (2×V ₃ ) mod N; or, v ₁ =0 _,

W ₂ =(2×V ₃ ) mod N, O ₁ =(2×V ₃ ) mod N.

Table 14

In the embodiment of this application, the design according to the above table

To determine q ₁ , q ₂ , q ₃ and q ₄ , it can make the frequency domain flatness of different channels, when there are β terminal devices based on the same base sequence of a sequence group and β different cyclic shift values When determining the reference signal sequence, the sum of the interference power of these reference signal sequences to the reference signal determined based on the other base sequence of the sequence group is very low. At the same time, this solution does not increase the interference between the reference signal sequences determined based on the base sequences of different sequence groups.

Optionally, this embodiment can be applied to different β values (for example, 1, 2, 4, 8) and different channel coherence bandwidths (for example, when the comb tooth is 2, the coherence bandwidth is 3RB, 4RB, 5RB, 6RB Or 12RB; or, when the comb tooth is 4, the coherence bandwidth is 6RB, 8RB, 10RB, 12RB or 24RB). For example, for β=1, 2 or 4, the coherence bandwidth is 4RB, 5RB, 6RB or 12RB (comb is 2), or the coherence bandwidth is 8RB, 10RB, 12RB or 24RB (comb is 4),

Belongs to A ₁₆ ; for β=1, 2 or 4, the coherence bandwidth is 3RB (comb is 2), or the coherence bandwidth is 6RB (comb is 4),

Belongs to A ₁₇ ; For β=8, the coherence bandwidth is 4RB, 5RB, 6RB or 12RB (comb is 2), or the coherence bandwidth is 8RB, 10RB, 12RB or 24RB (comb is 4),

Belongs to A ₁₈ . Of course, the above is just an example, and A ₁₆ , A ₁₇ and A ₁₈ can also correspond to other β values and other coherent bandwidths, which will not be repeated here.

Situation two

For different absolute values of N and V ₃

It may belong to the set A ₁₉ , A ₂₀ or A ₂₁ shown in Table 15 below, and the correspondence between the set A ₁₉ , A ₂₀ or A ₂₁ and N satisfies at least one row in Table 15. Alternatively, using equation (3) determining a first root ZC sequence q _1, q root ZC sequence root q of the second _2, the third ₃ and the ZC sequence of fourth ZC sequence The root of q ₄ , where i = 1, 2, 3, 4, v ₁ = 0,

W ₂ =-V ₃ , O ₁ =(2×V ₃ ) mod N.

Table 15

In the embodiment of this application, the design according to the above table

Belongs to A ₁₉ ; for β=1, 2 or 4, the coherence bandwidth is 3RB (comb is 2), or the coherence bandwidth is 6RB (comb is 4),

Belongs to A ₂₀ ; for β=8, the coherence bandwidth is 4RB, 5RB, 6RB or 12RB (comb is 2), or the coherence bandwidth is 8RB, 10RB, 12RB or 24RB (comb is 4),

Belongs to A ₂₁ . Of course, the above is only an example, and A ₁₉ , A ₂₀ and A ₂₁ can also correspond to other β values and other coherent bandwidths, which will not be repeated here.

Situation three

For different absolute values of N and V ₃

It can be equal to the set A ₂₂ , A ₂₃ or A ₂₄ , and the corresponding relationship between the set A ₂₂ , A ₂₃ or A ₂₄ and N satisfies at least one row in Table 16. Alternatively, using equation (3) determining a first root ZC sequence q _1, q root ZC sequence root q of the second _2, the third ₃ and the ZC sequence of fourth ZC sequence The root of q ₄ , where i = 1, 2, 3, 4, v ₁ = 0,

W ₂ =-V ₃ , O ₁ =(2×V ₃ ) mod N.

Table 16

NN	A ₂₂(β＝1,2,4) A ₂₂ (β＝1,2,4)	A ₂₃(β＝1,2,4) A ₂₃ (β＝1,2,4)	A ₂₄(β＝8) A ₂₄ (β=8)
113113	To	To	To
131131	2828	To	To
139139	1919	To	To
151151	4040	To	To
167167	1212	To	To
179179	77	6262	To
191191	7575	3838	To
199199	1414	3636	5959

211211	88	4242	55
227227	3131	7979	23twenty three
239239	99	4848	7171
251251	6666	8787	5151
263263	3636	4040	22
271271	3737	4949	5555
283283	8181	4343	4242
311311	8989	1616	102102
317317	1212	6363	104104
331331	1212	1717	8888
359359	4949	5555	7373
383383	1414	7676	99
389389	1414	2020	152152
401401	1515	139139	141141
431431	5959	6666	6464
449449	1717	156156	214214
479479	1818	7373	191191
503503	1919	7777	5151
523523	1919	8080	5353
547547	2020	190190	218218
571571	7878	8787	5858
619619	225225	215215	295295
647647	24twenty four	9999	9696
661661	2525	101101	315315
719719	2727	110110	7373
761761	104104	116116	113113
787787	286286	120120	8080
811811	111111	124124	1919
863863	118118	132132	236236
911911	331331	139139	363363
953953	3636	331331	335335
997997	3737	346346	148148
10511051	382382	365365	156156
11031103	151151	383383	112112
11511151	418418	176176	2727
12371237	169169	189189	2929
12911291	469469	197197	353353
13271327	482482	461461	3131
14391439	197197	220220	326326
15311531	556556	234234	347347
15831583	575575	242242	3737
16271627	591591	565565	3838

In the embodiment of this application, the design according to the above table

Belongs to A ₂₂ ; for β=1, 2 or 4, the coherence bandwidth is 3RB (comb is 2), or the coherence bandwidth is 6RB (comb is 4),

Belongs to A ₂₃ ; for β=8, the coherence bandwidth is 4RB, 5RB, 6RB or 12RB (comb is 2), or the coherence bandwidth is 8RB, 10RB, 12RB or 24RB (comb is 4),

Belongs to A ₂₄ . Of course, the above is just an example, and A ₂₂ , A ₂₃ and A ₂₄ can also correspond to other β values and other coherent bandwidths, which will not be repeated here.

As an optional embodiment, X is an integer greater than or equal to 5, the X base sequences include five base sequences, and the roots of the ZC sequences corresponding to the five base sequences are q ₄ , (q ₄ +V ₄ )mod N, (q ₄ +W ₃ )mod N, (q ₄ +O ₂ )mod N and (q ₄ +P)mod N, where q ₄ is an integer from 1 to N-1, and V ₄ is an integer, and the range of the absolute value of V ₄ is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ], W ₃ is an integer, and the range of the absolute value of W ₃ is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ], O ₂ is an integer, and the range of the absolute value of O ₂ is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ], P is an integer, and The range of the absolute value of P is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ].

As an optional embodiment, when X is an integer greater than or equal to 5, |c _i |∈[K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ],i=1,2,..., X-1. Optionally, c _i is an integer determined according to V ₄ .

As an optional embodiment, the relationship between V ₄ and W ₃ satisfies any one of the following formulas: W ₃ =-V ₄ , or W ₃ = (2×V ₄ ) mod N; or, V ₄ and O ₂ The relationship of satisfies any one of the following formulas: O ₂ =(2×V ₄ )mod N, or O ₂ =(3×V ₄ )mod N; or, the relationship between V ₄ and P satisfies any one of the following formulas : P=(-2×V ₄ )mod N, P=(3×V ₄ )mod N, P=(4×V ₄ )mod N.

As an optional embodiment, W ₃ =-V ₄ , O ₂ = (2×V ₄ ) mod N, P=(-2×V ₄ ) mod N; or, W ₃ =-V ₄ , O ₂ =(2×V ₄ )mod N, P=(3×V ₄ )mod N; or, W ₃ =(2×V ₄ )mod N, O ₂ =(3×V ₄ )mod N, P=( 4×V ₄ )mod N.

The characteristics of V ₄ are:

(1) V ₄ is an integer;

(2) There are different N, making the value of V ₄ different;

(3) For different u, the value of V ₄ can be the same or different;

(4) There are N and u, so that the absolute value of V ₄ belongs to [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ].

The characteristics of W ₃ are:

(1) W ₃ is an integer;

(2) There are different N, which makes the value of W ₃ different;

(3) For different u, the value of W ₃ can be the same or different;

(4) There are N and u, so that the absolute value of W ₃ belongs to [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ].

The characteristics of O ₂ are:

(1) O ₂ is an integer;

(2) There are different N, which makes the value of O ₂ different;

(3) For different u, the value of O ₂ can be the same or different;

(4) There are N and u, so that the absolute value of O ₂ belongs to [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ].

The characteristics of P are:

(1) P is an integer;

(2) There are different N, making the value of P different;

(3) For different u, the value of P can be the same or different;

(4) There are N and u, so that the absolute value of P belongs to [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ].

When X is an integer greater than or equal to 5, the number of base sequences of length M in the first sequence group is greater than or equal to 5. For the convenience of description, take X=5 as an example. It is assumed that the five base sequences include the four base sequences in the above-mentioned embodiment where X=4, for the first base sequence, the second base sequence, the third base sequence, the fourth base sequence, and the fifth base sequence in the first sequence group. Base sequence, the root of the first ZC sequence used to generate the first base sequence is q ₁ , the root of the second ZC sequence used to generate the second base sequence is q ₂ , the root of the third base sequence The root of the third ZC sequence is q ₃ , the root of the fourth ZC sequence used to generate the fourth base sequence is q ₄ , and the root of the fifth ZC sequence used to generate the fifth base sequence is q ₅ , then In the above four formulas (1)～(4), i=1, 2, 3, 4, 5, v ₁ =0,

At this time, W ₃ =-V ₄ , O ₂ = (2×V ₄ ) mod N, P=(-2×V ₄ ) mod N; or,

v ₁ = 0,

At this time, W ₃ =-V ₄ , O ₂ = (2×V ₄ ) mod N, P=(3×V ₄ ) mod N; or,

v ₁ = 0,

At this time, W ₃ =(2×V ₄ ) mod N, O ₂ =(3×V ₄ ) mod N, and P=(4×V ₄ ) mod N.

The absolute value of V ₄ can be divided into the following situations.

Situation One

If the root is calculated by any one of the above four formulas (1) to (4), the absolute values of N, V ₄ , W ₃ , O ₂ , and P can belong to the following table 17 The sets A ₂₅ and A _{26 are shown} . For different absolute values of N and V ₄

It may belong to the set A ₂₅ or A ₂₆ shown in Table 17 below, and the correspondence between the set A ₂₅ or A ₂₆ and N satisfies at least one row in Table 17. Optionally, at least one formula in formulas (1) to (4) can be used to determine the root q ₁ of the first ZC sequence, the root q _{2 of} the second ZC sequence, and the root q ₂ of the third ZC sequence. _{q. 3} root, root ZC sequence q ₄ of the fourth and the fifth root ZC sequence _{q. 5,} _{wherein, i = 1,2,3,4,5, v 1 =} 0,

W ₃ =-V ₄ , O ₂ = (2×V ₄ ) mod N, P=(-2×V ₄ ) mod N; or, v ₁ =0,

W ₃ =-V ₄ , O ₂ = (2×V ₄ ) mod N, P=(3×V ₄ ) mod N; or, v ₁ =0,

W ₃ =(2×V ₄ ) mod N, O ₂ =(3×V ₄ ) mod N, P=(4×V ₄ ) mod N.

Table 17

In the embodiment of this application, the design according to the above table

To determine q ₁ , q ₂ , q ₃ , q _4, and q ₅ , which can make the frequency domain flatness of different channels when there are β terminal devices based on the same base sequence of a sequence group and β different cycles When the reference signal sequence is determined by the shift value, the sum of the interference power of these reference signal sequences to the reference signal determined based on the other base sequence of the sequence group is very low. At the same time, this solution does not increase the interference between the reference signal sequences determined based on the base sequences of different sequence groups.

Optionally, this embodiment can be applied to different β values (for example, 1, 2, 4) and different channel coherence bandwidths (for example, when the comb tooth is 2, the coherence bandwidth is 4RB, 5RB, 6RB or 12RB; or , When the comb tooth is 4, the coherence bandwidth is 8RB, 10RB, 12RB or 24RB). For example, for β=1, 2 or 4, the coherence bandwidth is 4RB (comb is 2), or the coherence bandwidth is 8RB (comb is 4),

Belongs to A ₂₅ ; For β=1, 2 or 4, the coherence bandwidth is 5RB, 6RB or 12RB (comb is 2), or the coherence bandwidth is 10RB, 12RB or 24RB (comb is 4),

Belongs to A ₂₆ . Of course, the above is just an example, and A ₂₅ and A ₂₆ can also correspond to other β values and other coherent bandwidths, which will not be repeated here.

Situation two

For different absolute values of N and V ₄

It may belong to the set A ₂₇ or A ₂₈ shown in Table 18 below, and the correspondence between the set A ₂₇ or A ₂₈ and N satisfies at least one row in Table 18. Alternatively, using equation (3) determining a first root ZC sequence q _1, q root ZC sequence root q of the second _2, the third ₃ ZC sequence, the ZC sequence of the fourth The root q _{4 of} and the root q _{5 of} the fifth ZC sequence, where i = 1, 2, 3, 4, 5, v ₁ = 0,

W ₃ =-V ₄ , O ₂ =(2×V ₄ ) mod N, P=(-2×V ₄ ) mod N.

Table 18

In the embodiment of this application, the design according to the above table

Belongs to A ₂₇ ; for β=1, 2 or 4, the coherence bandwidth is 5RB, 6RB or 12RB (comb is 2), or the coherence bandwidth is 10RB, 12RB or 24RB (comb is 4),

Belongs to A ₂₈ . Of course, the above is just an example, and A ₂₇ and A ₂₈ can also correspond to other β values and other coherent bandwidths, which will not be repeated here.

Situation three

For different absolute values of N and V ₄

It can be equal to the set A ₂₉ or A ₃₀ , and the corresponding relationship between the value of the set A ₂₉ or A ₃₀ and N satisfies at least one row in Table 19. Alternatively, using equation (3) determining a first root ZC sequence q _1, q root ZC sequence root q of the second _2, the third ₃ ZC sequence, the ZC sequence of the fourth The root q _{4 of} and the root q _{5 of} the fifth ZC sequence, where i = 1, 2, 3, 4, 5, v ₁ = 0,

W ₃ =-V ₄ , O ₂ =(2×V ₄ ) mod N, P=(-2×V ₄ ) mod N.

Table 19

NN	A ₂₉(β＝1,2,4，γ＝24) A ₂₉ (β=1, 2, 4, γ=24)	A ₃₀(β＝1,2,4，γ＝30,36,72) A ₃₀ (β=1, 2, 4, γ= ₃₀ , 36, 72)
113113	To	To
131131	To	To
139139	To	To
151151	To	To
167167	To	To
179179	To	To
191191	7575	5858
199199	3636	4646
211211	3838	44
227227	4141	5050
239239	4343	9898
251251	112112	5858
263263	66	5858
271271	4949	55
283283	5151	2626
311311	5656	2828
317317	22twenty two	66
331331	23twenty three	7373
359359	2525	8383
383383	6969	183183
389389	2727	5353
401401	128128	193193

431431	3030	3939
449449	8181	216216
479479	153153	99
503503	3535	242242
523523	167167	4848
547547	175175	224224
571571	103103	126126
619619	198198	5656
647647	207207	1919
661661	211211	318318
719719	130130	4141
761761	243243	168168
787787	142142	182182
811811	259259	179179
863863	156156	295295
911911	291291	201201
953953	172172	1818
997997	180180	220220
10511051	190190	243243
11031103	199199	255255
11511151	208208	266266
12371237	223223	548548
12911291	233233	206206
13271327	424424	2525
14391439	260260	8282
15311531	276276	2929
15831583	286286	486486
16271627	294294	376376

In the embodiment of this application, the design according to the above table

Belongs to A ₂₉ ; For β=1, 2 or 4, the coherence bandwidth is 5RB, 6RB or 12RB (comb is 2), or the coherence bandwidth is 10RB, 12RB or 24RB (comb is 4),

Belongs to A ₃₀ . Of course, the above is just an example, and A ₂₉ and A ₃₀ can also correspond to other β values and other coherent bandwidths, which will not be repeated here.

The foregoing multiple embodiments have been described for expanding the number of base sequences of length M in the first sequence group to X (X=2,3,4,5). It should be understood that for the length of the first sequence group X is the number of sequence number of M _1, and / or the length of a first sequence group ₁ is a sequence of M ₂ X _2, also a method of the above-described embodiment can be expanded employed. For example, according to the above-mentioned embodiment of X=2, the number of base sequences of length M ₁ is increased to X ₁ = 2; or, according to the above-mentioned embodiment of X=3, the number of base sequences of length M ₁ The number is increased to X ₁ =3. For another example, according to the above embodiment where X=4, the number of base sequences with a length of M ₂ is increased to X ₂ =4. Other sequence groups are similar, so I won’t repeat them here.

It should be understood that the size of the sequence numbers of the foregoing processes does not mean the order of execution. The execution order of the processes should be determined by their functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

The communication method according to the embodiment of the present application is described in detail above with reference to Figs. 1 to 4, and the device according to the embodiment of the present application will be described in detail below in conjunction with Figs. 5 to 7.

Fig. 5 shows an apparatus 500 provided by an embodiment of the present application. The device 500 may be a terminal device, or a device capable of supporting the terminal device to realize its functions, for example, a chip or a chip system that can be used in the terminal device. The device 500 includes a processing unit 510 and a sending unit 520.

In a possible implementation manner, the apparatus 500 is configured to execute each process and step corresponding to the terminal device in the method provided in the embodiment of the present application.

The processing unit 510 is configured to: obtain a reference signal sequence of length M, where M is an integer greater than 1;

The sending unit 520 is configured to send the reference signal sequence to a network device;

Wherein, the reference signal sequence is determined by a first base sequence of length M, the first base sequence belongs to a first sequence group, and the number of base sequences of length M in the first sequence group is X , The X base sequences have the same group index, the X base sequences are determined by X ZC sequences of length N, where N is an integer greater than 1, and X is an integer greater than or equal to 2. The roots of the ZC sequence corresponding to any two of the X basis sequences are q ₁ and (q ₁ +V ₁ )mod N, q ₁ is an integer from 1 to N-1, V ₁ is an integer, and V ₁ The range of the absolute value of is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ], K ₁ , K ₂ , K ₃ and K ₄ are all integers, K ₁ >1,

K ₄ <N-1, when N is an odd number,

When N is even,

Optionally, the first sequence group belongs to Y sequence groups, and Y is an integer greater than or equal to 2; the number of base sequences with length M in the y-th sequence group in the Y sequence groups is X ^(y) , the X ^(y) base sequences of length M are determined by X ^(y) ZC sequences of length N, X ^(y) is an integer greater than or equal to 2, the X ^{(y )} The roots of the ZC sequence corresponding to any two of the base sequences of length M are q′ and (q′+V′) mod N, q′ is an integer from 1 to N-1, and V′ is an integer , And the value range of the absolute value of V'is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ].

Optionally, when N is an odd number greater than or equal to the first threshold, the absolute value of V ₁ belongs to the set

Represents the smallest integer greater than or equal to A.

Optionally, when N is an odd number greater than or equal to the first threshold, the absolute value of V′ belongs to the set

Represents the smallest integer greater than or equal to A.

Optionally, X is an integer greater than or equal to 3, the X base sequences include three base sequences, and the roots of the ZC sequences corresponding to the three base sequences are q ₂ , (q ₂ +V ₂ ), respectively mod N and (q ₂ +W ₁ ) mod N, where q ₂ is an integer from 1 to N-1, V ₂ is an integer, and the absolute value of V ₂ ranges from [K ₁ ,K ₂ ]∪ [K ₃ ,K ₄ ], W ₁ is an integer, and the range of the absolute value of W ₁ is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ].

Optionally, the relationship between V ₂ and W ₁ satisfies any one of the following formulas: W ₁ =-V ₂ , or W ₁ =(2×V ₂ ) mod N.

Optionally, X is an integer greater than or equal to 4, the X base sequences include four base sequences, and the roots of the ZC sequences corresponding to the four base sequences are q ₃ , (q ₃ +V ₃ ) mod N, (q ₃ +W ₂ )mod N and (q ₃ +O ₁ )mod N, where q ₃ is an integer from 1 to N-1, V ₃ is an integer, and the range of the absolute value of V ₃ Is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ], W ₂ is an integer, and the absolute value of W ₂ ranges from [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ], O ₁ is an integer, and the range of the absolute value of O ₁ is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ].

Optionally, the relationship between V ₃ and W ₂ satisfies any one of the following formulas: W ₂ =-V ₃ , or W ₂ =(2×V ₃ ) mod N; or, the relationship between V ₃ and O ₁ satisfies the following Either one of the formulas: O ₁ =(2×V ₃ ) mod N, or O ₁ =(3×V ₃ ) mod N.

Optionally, X is an integer greater than or equal to 5, the X base sequences include five base sequences, and the roots of the ZC sequences corresponding to the five base sequences are q ₄ , (q ₄ +V ₄ ), respectively mod N, (q ₄ +W ₃ )mod N, (q ₄ +O ₂ )mod N, and (q ₄ +P)mod N, where q ₄ is an integer from 1 to N-1, and V ₄ is an integer, And the range of the absolute value of V ₄ is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ], W ₃ is an integer, and the range of the absolute value of W ₃ is [K ₁ ,K ₂ ] ∪[K ₃ ,K ₄ ], O ₂ is an integer, and the range of the absolute value of O ₂ is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ], P is an integer, and the absolute value of P The value range of is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ].

Optionally, the relationship between V ₄ and W ₃ satisfies any one of the following formulas: W ₃ =-V ₄ , or W ₃ =(2×V ₄ ) mod N; or, the relationship between V ₄ and O ₂ satisfies the following Either one of the formulas: O ₂ = (2×V ₄ ) mod N, or O ₂ = (3×V ₄ ) mod N; or, the relationship between V ₄ and P satisfies any one of the following formulas: P=( -2×V ₄ )mod N, P=(3×V ₄ )mod N, P=(4×V ₄ )mod N.

It should be understood that the device 500 here is embodied in the form of a functional unit. The term "unit" here can refer to application specific integrated circuit (application specific integrated circuit, ASIC), electronic circuit, processor for executing one or more software or firmware programs (such as shared processor, proprietary processor or group Processor, etc.) and memory, merge logic circuits and/or other suitable components that support the described functions. In an optional example, those skilled in the art can understand that the apparatus 500 may be specifically the terminal device in the foregoing embodiment, and the apparatus 500 may be used to execute each process and/or step corresponding to the terminal device in the foregoing method embodiment. To avoid repetition, I won’t repeat them here.

FIG. 6 shows an apparatus 600 provided by an embodiment of the present application. The device 600 may be a network device, or a device capable of supporting the network device to realize its functions, for example, a chip or a chip system that can be used in the network device. The device 600 includes a sending unit 610 and a receiving unit 620.

The sending unit 610 is configured to send configuration information to a terminal device, where the configuration information is used to configure a first sequence group, the number of base sequences of length M in the first sequence group is X, and the X base sequences Sequences have the same group index, the X base sequences are determined by X ZC sequences, N is an integer greater than 1, X is an integer greater than or equal to 2, any two base sequences in the X base sequences The roots of the corresponding ZC sequence are q ₁ and (q ₁ +V ₁ )mod N respectively, q ₁ is an integer from 1 to N-1, V ₁ is an integer, and the absolute value of V ₁ ranges from [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ], K ₁ , K ₂ , K ₃ and K ₄ are all integers, K ₁ >1,

K ₄ <N-1, when N is an odd number,

When N is even,

Represents the largest integer less than or equal to A, [A, B] represents a set of integers greater than or equal to A and less than or equal to B, and A mod B represents that A modulates B;

The receiving unit 620 is configured to receive a reference signal sequence, the reference signal sequence is determined by a first base sequence, and the first base sequence belongs to the first sequence group.

Represents the smallest integer greater than or equal to A.

It should be understood that the device 600 here is embodied in the form of a functional unit. The term "unit" here can refer to application specific integrated circuit (application specific integrated circuit, ASIC), electronic circuit, processor for executing one or more software or firmware programs (such as shared processor, proprietary processor or group Processor, etc.) and memory, merge logic circuits and/or other suitable components that support the described functions. In an optional example, those skilled in the art can understand that the apparatus 500 may be specifically the network device in the above-mentioned embodiment, and the apparatus 600 may be used to execute each process and/or step corresponding to the network device in the above-mentioned method embodiment. To avoid repetition, I won’t repeat them here.

The apparatus 500 and the apparatus 600 of the above solutions respectively have the functions of implementing the corresponding steps performed by the terminal equipment and the network equipment in the above methods; the functions can be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions; for example, the sending unit and the receiving unit can be replaced by a communication interface, and other units, such as a processing unit, can be replaced by a processor to execute the respective method embodiments. Send and receive operations and related processing operations. In the embodiments of the present application, the communication interface may be a circuit, module, bus, bus interface, transceiver, and other devices that can implement communication functions.

In the embodiment of the present application, the devices in FIG. 5 and FIG. 6 may also be a chip or a chip system, such as a system on chip (system on chip, SoC). Correspondingly, the receiving unit and the sending unit may be the transceiver circuit of the chip, which is not limited here.

FIG. 7 shows another apparatus 700 provided by an embodiment of the present application. The device 700 includes a processor 710 and a communication interface 720. Optionally, the device 700 may further include a memory 750. Optionally, the memory 750 may be included in the processor 710. The processor 710, the communication interface 720, and the memory 750 communicate with each other through an internal connection path, the memory 750 is used to store instructions, and the processor 710 is used to execute instructions stored in the memory 750 to implement the method provided in the embodiments of the present application.

In a possible implementation manner, the apparatus 700 is configured to execute each process and step corresponding to the terminal device in the method provided in the embodiment of the present application.

Wherein, the processor 710 is configured to: obtain a reference signal sequence of length M, where M is an integer greater than 1, and send the reference signal sequence to the network device through the communication interface 720; wherein, the reference signal sequence is composed of a length of M The first base sequence is determined by the first base sequence, the first base sequence belongs to a first sequence group, the number of base sequences with a length of M in the first sequence group is X, and the X base sequences have the same group index , The X base sequences are determined by X ZC sequences of length N, N is an integer greater than 1, X is an integer greater than or equal to 2, and any two base sequences in the X base sequences correspond to The roots of the ZC sequence are respectively q ₁ and (q ₁ +V ₁ )mod N, q ₁ is an integer from 1 to N-1, V ₁ is an integer, and the absolute value of V ₁ ranges from [K ₁ , K ₂ ]∪[K ₃ ,K ₄ ], K ₁ , K ₂ , K ₃ and K ₄ are all integers, K ₁ >1,

K ₄ <N-1, when N is an odd number,

When N is even,

In a possible implementation manner, the apparatus 700 is used to execute each process and step corresponding to the network device in the method provided in the embodiment of this application.

The processor 710 is configured to send configuration information to the terminal device through the communication interface 720, the configuration information is used to configure a first sequence group, and the number of base sequences of length M in the first sequence group is X, The X base sequences have the same group index, and the X base sequences are determined by X ZC sequences with a length of N, where N is an integer greater than 1, and X is an integer greater than or equal to 2. The roots of the ZC sequence corresponding to any two of the base sequences are q ₁ and (q ₁ +V ₁ )mod N, q ₁ is an integer from 1 to N-1, V ₁ is an integer, and the value of V ₁ The absolute value range is [K ₁ ,K ₂ ]∪[K ₃ ,K ₄ ], K ₁ , K ₂ , K ₃ and K ₄ are all integers, K ₁ >1,

K ₄ <N-1, when N is an odd number,

When N is even,

Represents the largest integer less than or equal to A, [A, B] represents a collection of integers greater than or equal to A and less than or equal to B, A mod B represents A modulo B; the reference signal sequence is received through the communication interface 720, The reference signal sequence is determined by a first base sequence, and the first base sequence belongs to the first sequence group.

It should be understood that the apparatus 700 may be specifically a terminal device or a network device in the foregoing embodiment, and may be used to execute various steps and/or processes corresponding to the terminal device or the network device in the foregoing method embodiment. Optionally, the memory 750 may include a read-only memory and a random access memory, and provide instructions and data to the processor. A part of the memory may also include a non-volatile random access memory. For example, the memory can also store device type information. The processor 710 may be configured to execute instructions stored in the memory, and when the processor 710 executes the instructions stored in the memory, the processor 710 is configured to execute the steps and/or steps of the above-mentioned method embodiment corresponding to the terminal device or the network device. Or process.

It should be understood that in the embodiments of the present application, the processor of the above-mentioned device may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSP), or application-specific integrated circuits. (ASIC), Field Programmable Gate Array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.

In the implementation process, the steps of the above method can be completed by hardware integrated logic circuits in the processor or instructions in the form of software. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software units in the processor. The software unit may 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, registers. The storage medium is located in the memory, and the processor executes the instructions in the memory and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.

In this application, "at least one" refers to one or more, and "multiple" refers to two or more. "And/or" describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the associated objects are in an "or" relationship. "The following at least one item (a)" or similar expressions refers to any combination of these items, including any combination of a single item (a) or plural items (a). For example, at least one item (a) of a, b, or c can represent: a, b, c, a-b, a-c, b-c or a-b-c, where a, b, and c can be single or multiple.

A person of ordinary skill in the art may be aware that, in combination with the method steps and units described in the embodiments disclosed herein, they can be implemented by electronic hardware, computer software, or a combination of the two, in order to clearly illustrate the possibilities of hardware and software. Interchangeability, in the above description, the steps and components of each embodiment have been generally described in terms of function. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Those of ordinary skill in the art can use different methods for each specific application to implement the described functions, but such implementation should not be considered as going beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here. In the embodiments of the present application, provided that there is no logical contradiction, the embodiments can be mutually cited. For example, methods and/or terms between method embodiments can be mutually cited, such as functions and/or functions between device embodiments. Or terms may refer to each other, for example, functions and/or terms between the device embodiment and the method embodiment may refer to each other.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, 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 addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may also be electrical, mechanical or other forms of connection.

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 they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments of the present application.

In addition, the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.

The methods provided in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented by software, it can be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a dedicated computer, a computer network, network equipment, user equipment, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as 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 data center integrated with one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital video disc (digital video disc, DVD)), or a semiconductor medium (for example, SSD).

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Anyone familiar with the technical field can easily think of various equivalents within the technical scope disclosed in this application. Modifications or replacements, these modifications or replacements shall be covered within the protection scope of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

A communication method, characterized in that it comprises:

Obtain a reference signal sequence of length M, where M is an integer greater than 1;

Sending the reference signal sequence to a network device;

Wherein, the reference signal sequence is determined by a first base sequence of length M, the first base sequence belongs to a first sequence group, and the number of base sequences of length M in the first sequence group is X , The X base sequences have the same group index, the X base sequences are determined by X ZC sequences of length N, where N is an integer greater than 1, and X is an integer greater than or equal to 2. The roots of the ZC sequence corresponding to any two of the X basis sequences are q 1 and (q 1 +V 1 )mod N, q 1 is an integer from 1 to N-1, V 1 is an integer, and V 1 The range of the absolute value of is [K 1 ,K 2 ]∪[K 3 ,K 4 ], K 1 , K 2 , K 3 and K 4 are all integers, K 1 >1,
K 4 <N-1, when N is an odd number,
When N is even,

Represents the largest integer less than or equal to A, [A, B] represents a set of integers greater than or equal to A and less than or equal to B, and A mod B represents that A modulates B.
The method according to claim 1, wherein the first sequence group belongs to Y sequence groups, and Y is an integer greater than or equal to 2;

The number of base sequences of length M in the y-th sequence group in the Y sequence groups is X (y) , and the X (y) base sequences are composed of X (y) ZCs of length N If the sequence is determined, X (y) is an integer greater than or equal to 2, and the roots of the ZC sequence corresponding to any two of the X (y) base sequences are q′ and (q′+V′) mod, respectively N, q′ are integers from 1 to N-1, V′ is an integer, and the absolute value of V′ ranges from [K 1 ,K 2 ]∪[K 3 ,K 4 ].
The method of claim 1 or 2, wherein when N is an odd number greater than or equal to the first threshold, the absolute value of V 1 belongs to the set
or,

When N is an even number greater than or equal to the second threshold, the absolute value of V 1 belongs to the set

Represents the smallest integer greater than or equal to A.
The method according to any one of claims 1-3, wherein the absolute value of V 1 belongs to the set A 1 , and the correspondence between the set A 1 and N satisfies at least one row in the following table:
The method according to any one of claims 1 to 3, wherein X is an integer greater than or equal to 3, the X base sequences include three base sequences, and the three base sequences correspond to ZC The roots of the sequence are q 2 , (q 2 +V 2 ) mod N and (q 2 + W 1 ) mod N, respectively, where q 2 is an integer from 1 to N-1, V 2 is an integer, and the value of V 2 The absolute value range is [K 1 ,K 2 ]∪[K 3 ,K 4 ], W 1 is an integer, and the absolute value range of W 1 is [K 1 ,K 2 ]∪[K 3 ,K 4 ].
The method of claim 5, wherein the relationship between V 2 and W 1 satisfies any one of the following formulas:

W 1 =-V 2 , or W 1 =(2×V 2 ) mod N.
The method according to claim 5 or 6, wherein the absolute value of V 2 belongs to the set A 50 , and the relationship between the set A 50 and N satisfies at least one row in the following table:
The method according to any one of claims 1 to 3, wherein X is an integer greater than or equal to 4, the X base sequences include four base sequences, and the four base sequences correspond to ZC sequences The roots of are q 3 , (q 3 +V 3 ) mod N, (q 3 +W 2 ) mod N and (q 3 +O 1 ) mod N, respectively, where q 3 is an integer from 1 to N-1, V 3 is an integer, and the range of the absolute value of V 3 is [K 1 ,K 2 ]∪[K 3 ,K 4 ], W 2 is an integer, and the range of the absolute value of W 2 is [K 1 ,K 2 ]∪[K 3 ,K 4 ], O 1 is an integer, and the range of the absolute value of O 1 is [K 1 ,K 2 ]∪[K 3 ,K 4 ].
The method according to claim 8, wherein the relationship between V 3 and W 2 satisfies any one of the following formulas:

W 2 =-V 3 , or W 2 = (2×V 3 ) mod N; or,

The relationship between V 3 and O 1 satisfies any of the following formulas:

O 1 =(2×V 3 ) mod N, or O 1 =(3×V 3 ) mod N.
The method according to any one of claims 1 to 3, wherein X is an integer greater than or equal to 5, the X base sequences include five base sequences, and the five base sequences correspond to ZC The roots of the sequence are q 4 , (q 4 +V 4 ) mod N, (q 4 +W 3 ) mod N, (q 4 +O 2 ) mod N, and (q 4 +P) mod N, where q 4 is an integer from 1 to N-1, V 4 is an integer, and the range of the absolute value of V 4 is [K 1 ,K 2 ]∪[K 3 ,K 4 ], W 3 is an integer, and W 3 The range of absolute value of is [K 1 ,K 2 ]∪[K 3 ,K 4 ], O 2 is an integer, and the range of absolute value of O 2 is [K 1 ,K 2 ]∪[K 3 ,K 4 ], P is an integer, and the range of the absolute value of P is [K 1 ,K 2 ]∪[K 3 ,K 4 ].
The method of claim 10, wherein the relationship between V 4 and W 3 satisfies any one of the following formulas:

W 3 =-V 4 , or W 3 = (2×V 4 ) mod N; or,

The relationship between V 4 and O 2 satisfies any one of the following formulas:

O 2 = (2×V 4 ) mod N, or O 2 = (3×V 4 ) mod N; or,

The relationship between V 4 and P satisfies any one of the following formulas:

P=(-2×V 4 )mod N, P=(3×V 4 )mod N, P=(4×V 4 )mod N.
A communication method, characterized in that it comprises:

Sending configuration information to the terminal device, the configuration information being used to configure a first sequence group, the number of base sequences of length M in the first sequence group is X, and the X base sequences have the same group index, The X base sequences are determined by X ZC sequences of length N, where N is an integer greater than 1, X is an integer greater than or equal to 2, and any two base sequences in the X base sequences correspond to ZC The roots of the sequence are respectively q 1 and (q 1 +V 1 )mod N, q 1 is an integer from 1 to N-1, V 1 is an integer, and the absolute value of V 1 ranges from [K 1 ,K 2 ]∪[K 3 ,K 4 ], K 1 , K 2 , K 3 and K 4 are all integers, K 1 >1,
K 4 <N-1, when N is an odd number,
When N is even,

Represents the largest integer less than or equal to A, [A, B] represents a set of integers greater than or equal to A and less than or equal to B, and A mod B represents that A modulates B;

A reference signal sequence is received, the reference signal sequence is determined by a first base sequence, and the first base sequence belongs to the first sequence group.
The method according to claim 12, wherein the first sequence group belongs to Y sequence groups, and Y is an integer greater than or equal to 2;

The number of base sequences of length M in the y-th sequence group in the Y sequence groups is X (y) , and the X (y) base sequences of length M are composed of X (y) lengths Determined for the ZC sequence of N, X (y) is an integer greater than or equal to 2, and the roots of the ZC sequences corresponding to any two of the base sequences of length M in the X (y) base sequences are q′ and (q′+V′)mod N, q′ is an integer from 1 to N-1, V′ is an integer, and the absolute value of V′ ranges from [K 1 ,K 2 ]∪[K 3 ,K 4 ].
The method according to claim 12 or 13, wherein when N is an odd number greater than or equal to the first threshold, the absolute value of V 1 belongs to the set
or,

When N is an even number greater than or equal to the second threshold, the absolute value of V 1 belongs to the set

Represents the smallest integer greater than or equal to A.
The method according to any one of claims 12-14, wherein X is an integer greater than or equal to 3, the X base sequences include three base sequences, and the three base sequences correspond to ZC The roots of the sequence are q 2 , (q 2 +V 2 ) mod N and (q 2 + W 1 ) mod N, respectively, where q 2 is an integer from 1 to N-1, V 2 is an integer, and the value of V 2 The absolute value range is [K 1 ,K 2 ]∪[K 3 ,K 4 ], W 1 is an integer, and the absolute value range of W 1 is [K 1 ,K 2 ]∪[K 3 ,K 4 ].
The method of claim 15, wherein the relationship between V 2 and W 1 satisfies any one of the following formulas:

W 1 =-V 2 , or W 1 =(2×V 2 ) mod N.
The method according to any one of claims 12-14, wherein X is an integer greater than or equal to 4, the X base sequences include four base sequences, and the four base sequences correspond to ZC sequences The roots of are q 3 , (q 3 +V 3 ) mod N, (q 3 +W 2 ) mod N and (q 3 +O 1 ) mod N, respectively, where q 3 is an integer from 1 to N-1, V 3 is an integer, and the range of the absolute value of V 3 is [K 1 ,K 2 ]∪[K 3 ,K 4 ], W 2 is an integer, and the range of the absolute value of W 2 is [K 1 ,K 2 ]∪[K 3 ,K 4 ], O 1 is an integer, and the range of the absolute value of O 1 is [K 1 ,K 2 ]∪[K 3 ,K 4 ].
The method of claim 17, wherein the relationship between V 3 and W 2 satisfies any one of the following formulas:

W 2 =-V 3 , or W 2 = (2×V 3 ) mod N; or,

The relationship between V 3 and O 1 satisfies any of the following formulas:

O 1 =(2×V 3 ) mod N, or O 1 =(3×V 3 ) mod N.
The method according to any one of claims 12-14, wherein X is an integer greater than or equal to 5, the X base sequences include five base sequences, and the five base sequences correspond to ZC The roots of the sequence are q 4 , (q 4 +V 4 ) mod N, (q 4 +W 3 ) mod N, (q 4 +O 2 ) mod N, and (q 4 +P) mod N, where q 4 is an integer from 1 to N-1, V 4 is an integer, and the range of the absolute value of V 4 is [K 1 ,K 2 ]∪[K 3 ,K 4 ], W 3 is an integer, and W 3 The range of absolute value of is [K 1 ,K 2 ]∪[K 3 ,K 4 ], O 2 is an integer, and the range of absolute value of O 2 is [K 1 ,K 2 ]∪[K 3 ,K 4 ], P is an integer, and the range of the absolute value of P is [K 1 ,K 2 ]∪[K 3 ,K 4 ].
The method of claim 19, wherein the relationship between V 4 and W 3 satisfies any one of the following formulas:

W 3 =-V 4 , or W 3 = (2×V 4 ) mod N; or,

The relationship between V 4 and O 2 satisfies any one of the following formulas:

O 2 = (2×V 4 ) mod N, or O 2 = (3×V 4 ) mod N; or,

The relationship between V 4 and P satisfies any one of the following formulas:

P=(-2×V 4 )mod N, P=(3×V 4 )mod N, P=(4×V 4 )mod N.
A device, characterized in that it comprises:

A processing unit for obtaining a reference signal sequence of length M, where M is an integer greater than 1;

A sending unit, configured to send the reference signal sequence to a network device;

Wherein, the reference signal sequence is determined by a first base sequence of length M, the first base sequence belongs to a first sequence group, and the number of base sequences of length M in the first sequence group is X , The X base sequences have the same group index, the X base sequences are determined by X ZC sequences of length N, where N is an integer greater than 1, and X is an integer greater than or equal to 2. The roots of the ZC sequence corresponding to any two of the X basis sequences are q 1 and (q 1 +V 1 )mod N, q 1 is an integer from 1 to N-1, V 1 is an integer, and V 1 The range of the absolute value of is [K 1 ,K 2 ]∪[K 3 ,K 4 ], K 1 , K 2 , K 3 and K 4 are all integers, K 1 >1,
K 4 <N-1, when N is an odd number,
When N is even,

Represents the largest integer less than or equal to A, [A, B] represents a set of integers greater than or equal to A and less than or equal to B, and A mod B represents that A modulates B.
The device according to claim 21, wherein the first sequence group belongs to Y sequence groups, and Y is an integer greater than or equal to 2;

The number of base sequences of length M in the y-th sequence group in the Y sequence groups is X (y) , and the X (y) base sequences of length M are composed of X (y) lengths Determined for the ZC sequence of N, X (y) is an integer greater than or equal to 2, and the roots of the ZC sequences corresponding to any two of the base sequences of length M in the X (y) base sequences are q'and (q′+V′)mod N, q′ is an integer from 1 to N-1, V′ is an integer, and the absolute value of V′ ranges from [K 1 ,K 2 ]∪[K 3 ,K 4 ].
The device according to claim 21 or 22, wherein when N is an odd number greater than or equal to the first threshold, the absolute value of V 1 belongs to the set
or,

When N is an even number greater than or equal to the second threshold, the absolute value of V 1 belongs to the set

Represents the smallest integer greater than or equal to A.
The device according to any one of claims 21-23, wherein X is an integer greater than or equal to 3, the X base sequences include three base sequences, and the three base sequences correspond to ZC The roots of the sequence are q 2 , (q 2 +V 2 ) mod N and (q 2 + W 1 ) mod N, respectively, where q 2 is an integer from 1 to N-1, V 2 is an integer, and the value of V 2 The absolute value range is [K 1 ,K 2 ]∪[K 3 ,K 4 ], W 1 is an integer, and the absolute value range of W 1 is [K 1 ,K 2 ]∪[K 3 ,K 4 ].
The device according to claim 24, wherein the relationship between V 2 and W 1 satisfies any one of the following formulas:

W 1 =-V 2 , or W 1 =(2×V 2 ) mod N.
The device according to any one of claims 21-23, wherein X is an integer greater than or equal to 4, the X base sequences include four base sequences, and the four base sequences correspond to ZC sequences The roots of are q 3 , (q 3 +V 3 ) mod N, (q 3 +W 2 ) mod N and (q 3 +O 1 ) mod N, respectively, where q 3 is an integer from 1 to N-1, V 3 is an integer, and the range of the absolute value of V 3 is [K 1 ,K 2 ]∪[K 3 ,K 4 ], W 2 is an integer, and the range of the absolute value of W 2 is [K 1 ,K 2 ]∪[K 3 ,K 4 ], O 1 is an integer, and the range of the absolute value of O 1 is [K 1 ,K 2 ]∪[K 3 ,K 4 ].
The device according to claim 26, wherein the relationship between V 3 and W 2 satisfies any one of the following formulas:

W 2 =-V 3 , or W 2 = (2×V 3 ) mod N; or,

The relationship between V 3 and O 1 satisfies any of the following formulas:

O 1 =(2×V 3 ) mod N, or O 1 =(3×V 3 ) mod N.
The device according to any one of claims 21-23, wherein X is an integer greater than or equal to 5, the X base sequences include five base sequences, and the five base sequences correspond to ZC The roots of the sequence are q 4 , (q 4 +V 4 ) mod N, (q 4 +W 3 ) mod N, (q 4 +O 2 ) mod N, and (q 4 +P) mod N, where q 4 is an integer from 1 to N-1, V 4 is an integer, and the range of the absolute value of V 4 is [K 1 ,K 2 ]∪[K 3 ,K 4 ], W 3 is an integer, and W 3 The range of absolute value of is [K 1 ,K 2 ]∪[K 3 ,K 4 ], O 2 is an integer, and the range of absolute value of O 2 is [K 1 ,K 2 ]∪[K 3 ,K 4 ], P is an integer, and the range of the absolute value of P is [K 1 ,K 2 ]∪[K 3 ,K 4 ].
The device according to claim 28, wherein the relationship between V 4 and W 3 satisfies any one of the following formulas:

W 3 =-V 4 , or W 3 = (2×V 4 ) mod N; or,

The relationship between V 4 and O 2 satisfies any one of the following formulas:

O 2 = (2×V 4 ) mod N, or O 2 = (3×V 4 ) mod N; or,

The relationship between V 4 and P satisfies any one of the following formulas:

P=(-2×V 4 )mod N, P=(3×V 4 )mod N, P=(4×V 4 )mod N.
A device, characterized in that it comprises:

The sending unit is configured to send configuration information to the terminal device, where the configuration information is used to configure a first sequence group. The number of base sequences of length M in the first sequence group is X, and the X base sequences have The same group index, the X base sequences are determined by X ZC sequences of length N, N is an integer greater than 1, X is an integer greater than or equal to 2, any two of the X base sequences The roots of the ZC sequence corresponding to the base sequence are q 1 and (q 1 +V 1 )mod N, q 1 is an integer from 1 to N-1, V 1 is an integer, and the absolute value of V 1 has a range of [K 1 ,K 2 ]∪[K 3 ,K 4 ], K 1 , K 2 , K 3 and K 4 are all integers, K 1 >1,
K 4 <N-1, when N is an odd number,
When N is even,

Represents the largest integer less than or equal to A, [A, B] represents a set of integers greater than or equal to A and less than or equal to B, and A mod B represents that A modulates B;

The receiving unit is configured to receive a reference signal sequence, where the reference signal sequence is determined by a first base sequence, and the first base sequence belongs to the first sequence group.
The device according to claim 30, wherein the first sequence group belongs to Y sequence groups, and Y is an integer greater than or equal to 2;

The number of base sequences of length M in the y-th sequence group in the Y sequence groups is X (y) , and the X (y) base sequences of length M are composed of X (y) lengths Determined for the ZC sequence of N, X (y) is an integer greater than or equal to 2, and the roots of the ZC sequences corresponding to any two of the base sequences of length M in the X (y) base sequences are q'and (q′+V′)mod N, q′ is an integer from 1 to N-1, V′ is an integer, and the absolute value of V′ ranges from [K 1 ,K 2 ]∪[K 3 ,K 4 ].
The device according to claim 30 or 31, wherein when N is an odd number greater than or equal to the first threshold, the absolute value of V 1 belongs to the set
or,

When N is an even number greater than or equal to the second threshold, the absolute value of V 1 belongs to the set

Represents the smallest integer greater than or equal to A.
The device according to any one of claims 30-32, wherein X is an integer greater than or equal to 3, the X base sequences include three base sequences, and the three base sequences correspond to ZC The roots of the sequence are q 2 , (q 2 +V 2 ) mod N and (q 2 + W 1 ) mod N, respectively, where q 2 is an integer from 1 to N-1, V 2 is an integer, and the value of V 2 The absolute value range is [K 1 ,K 2 ]∪[K 3 ,K 4 ], W 1 is an integer, and the absolute value range of W 1 is [K 1 ,K 2 ]∪[K 3 ,K 4 ].
The device according to claim 33, wherein the relationship between V 2 and W 1 satisfies any one of the following formulas:

W 1 =-V 2 , or W 1 =(2×V 2 ) mod N.
The device according to any one of claims 30-32, wherein X is an integer greater than or equal to 4, the X base sequences include four base sequences, and the four base sequences correspond to ZC sequences The roots of are q 3 , (q 3 +V 3 ) mod N, (q 3 +W 2 ) mod N and (q 3 +O 1 ) mod N, respectively, where q 3 is an integer from 1 to N-1, V 3 is an integer, and the range of the absolute value of V 3 is [K 1 ,K 2 ]∪[K 3 ,K 4 ], W 2 is an integer, and the range of the absolute value of W 2 is [K 1 ,K 2 ]∪[K 3 ,K 4 ], O 1 is an integer, and the range of the absolute value of O 1 is [K 1 ,K 2 ]∪[K 3 ,K 4 ].
The device according to claim 35, wherein the relationship between V 3 and W 2 satisfies any one of the following formulas:

W 2 =-V 3 , or W 2 = (2×V 3 ) mod N; or,

The relationship between V 3 and O 1 satisfies any of the following formulas:

O 1 =(2×V 3 ) mod N, or O 1 =(3×V 3 ) mod N.
The device according to any one of claims 30-32, wherein X is an integer greater than or equal to 5, the X base sequences include five base sequences, and the five base sequences correspond to ZC The roots of the sequence are q 4 , (q 4 +V 4 ) mod N, (q 4 +W 3 ) mod N, (q 4 +O 2 ) mod N, and (q 4 +P) mod N, where q 4 is an integer from 1 to N-1, V 4 is an integer, and the range of the absolute value of V 4 is [K 1 ,K 2 ]∪[K 3 ,K 4 ], W 3 is an integer, and W 3 The range of absolute value of is [K 1 ,K 2 ]∪[K 3 ,K 4 ], O 2 is an integer, and the range of absolute value of O 2 is [K 1 ,K 2 ]∪[K 3 ,K 4 ], P is an integer, and the range of the absolute value of P is [K 1 ,K 2 ]∪[K 3 ,K 4 ].
The device according to claim 37, wherein the relationship between V 4 and W 3 satisfies any one of the following formulas:

W 3 =-V 4 , or W 3 = (2×V 4 ) mod N; or,

The relationship between V 4 and O 2 satisfies any one of the following formulas:

O 2 = (2×V 4 ) mod N, or O 2 = (3×V 4 ) mod N; or,

The relationship between V 4 and P satisfies any one of the following formulas:

P=(-2×V 4 )mod N, P=(3×V 4 )mod N, P=(4×V 4 )mod N.
An apparatus, comprising: a memory and one or more processors, the one or more processors are coupled with the memory, and the one or more processors are configured to execute any of claims 1 to 20 The method described in one item.
A computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a computer, the computer is caused to implement the method as described in any one of claims 1 to 20 The method described.
A computer program product, the computer program product contains instructions, characterized in that, when the instructions run on a computer, the computer realizes the method according to any one of claims 1 to 20.
A chip, characterized by comprising: one or more processors, used to call and execute instructions stored in the memory from the memory, so that the method according to any one of claims 1 to 20 is executed .
A communication system, characterized by comprising the device according to any one of claims 21 to 29 and the device according to any one of claims 30 to 38.