WO2020119154A1 - Communication method and device - Google Patents

Abstract

A communication method and device, comprising: a terminal device generating a reference signal sequence having a length of M, the reference signal sequence being generated by a base sequence having a length of M in a first sequence group allocated to the terminal device, the number of base sequences having a length of M in the first sequence group being X, the ith base sequence in the X base sequences being generated by a ZC sequence having a length N and a root index of qi; when X is an integer greater than or equal to 2, the root index of a first ZC sequence corresponding to any two base sequences among the X base sequences is q, the root index of a second ZC sequence corresponding to any two base sequences is (q+V)mod N, the absolute value of V is an integer greater than or equal to K1 and less than or equal to n-k1, K1 > 1; or, when X is greater than or equal to 3, the root index of the first ZC sequence is q, the root index of the second ZC sequence is (q+V)mod N, the root index of a third ZC sequence that generates a third sequence is (q+V)mod N, the absolute value of V is 1, the absolute value of W is greater than K2 and less than N-K2, or the absolute values of V and W are integers greater than or equal to K3 and less than or equal to N-K3. The third sequence is any base sequence other than the first sequence and the second sequence in the X base sequences; and the terminal device transmits the reference signal sequence.

Description

Communication method and device

Cross-reference of related applications

This application requires the priority of the patent application submitted to the China Patent Office on December 11, 2018, with the application number PCT/CN2018/120412 and the application name "a communication method and device", the entire content of which is incorporated by reference in this document Applying.

Technical field

This application relates to the field of wireless communication technology, and in particular, to a communication method and device.

Background technique

In systems such as long term evolution (LTE) and new radio (NR), uplink reference signals, such as uplink demodulation reference signals (DMRS) and uplink sounding reference signals (SRS) ) Uses the sequence generated by the base sequence (Base Sequence), for example, the base sequence of length M is r(m), m=0,1,2,...,M-1, then the sequence generated by the base sequence Can be

A·exp(jαm)·r(m), m=0,1,2,...,M-1,

Where, M is an integer greater than 1, α is a value determined by the time-domain cyclic shift value, is a real number, j is a unit of an imaginary number, and A is a complex number.

The above-mentioned base sequence may be a sequence generated by a ZC (Zadoff-Chu) sequence, for example, the ZC sequence itself, or a sequence generated by cyclic expansion or interception of the ZC sequence. For example, a ZC sequence of length N is z _q (n), n=0, 1, ..., N-1, then a sequence of length M generated from the ZC sequence can be expressed as: z _q (m mod N ), m = 0, 1, ..., M-1. The ZC sequence of length N can be expressed as follows:

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

The above reference signal is SRS as an example. Before sending the SRS, the terminal device needs to determine the SRS sequence according to the base sequence. In the 3rd Generation Partnership Project (3GPP) standard, the length M of various SRS sequences is specified, and 60 base sequences are defined for each value of M greater than or equal to 72. Among them, this The 60 base sequences are generated by ZC sequences with the same length and different root indexes. Further, the 60 base sequences are divided into 30 groups, and different groups of base sequences can be allocated to different cells. Taking M=72 as an example, it is the ZC sequence with a length of 71 that generates 30 sets of base sequences. The relationship between the root indexes of these ZC sequences and the group number of the base sequence can be referred to Table 1:

Table 1

Each cell can allocate 2 base sequences of the same length to the terminal equipment to generate the final transmitted SRS sequence. In a cell, each terminal device transmitting an SRS sequence of the same length at the same time uses the SRS sequence generated by the same base sequence in the group. When generating the SRS sequence with the same base 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 of the same group are used as hopping sequences, that is, at different times, the base sequence used by a terminal device can be carried out between the two base sequences in this group according to the design pattern. Hopping, whose purpose is to randomize inter-cell interference. During the sequence hopping process, at the same time, all terminal devices in the same cell that send the same length SRS sequence still use the same base sequence to generate the SRS sequence.

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 satisfying the huge number of terminal devices. This leads to the need for different terminal devices to send SRS in turn by time division, resulting in a large SRS cycle, such as 20ms. 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 previously measured according to SRS, which seriously affects the system. Performance.

In order to improve the accuracy of the channel state information and avoid the serious problem of outdated channel state information, one solution is to directly extend the two base sequences of the same group in the prior art to be used at the same time. For details, see Document 1 "R1- 1712239, "UL SRS sequence design in NR", Huawei, HiSilicon, August 2017" and document 2 "R1-1716374, "Details on SRS design", Ericsson, Sep., 2017". Two ZC sequences of the same group are allocated to different terminal devices at the same time. At the same moment, the number of ZC sequences of the same length included in each group is changed from 1 to 2. The number of terminal devices that can support the transmission of SRS sequences of the same length at the same time is doubled, and the number of supported SRS The cycle is reduced to half of the original. However, such a solution is likely to cause great interference between SRS sequences used by different terminal devices in the same cell.

Summary of the invention

The purpose of the embodiments of the present application is to provide a communication method and device to solve the problem that at least two base sequences in each group having different root indexes and having the same length are allocated to different terminal devices at the same time, generated by different base sequences The problem of greater interference between reference signal sequences.

In a first aspect, an embodiment of the present application provides a communication method, including: a terminal device generating a reference signal sequence of length M, where M is an integer greater than 1; the reference signal sequence is assigned by the first to the terminal device A base sequence of length M in the sequence group is generated, the number of base sequences of length M in the first sequence group is X, and the i-th base sequence in the X base sequences is determined by the length of N and the root index of the ZC sequence generated q _i, q _i is an integer of 1 to N-1, and N is an integer greater than 1, when the value i is not the same, different values q _i; wherein, When X is an integer greater than or equal to 2, the root index of the first ZC sequence corresponding to the first sequence of any two of the X base sequences is q, and the second of the two base sequences The root index of the second ZC sequence corresponding to the sequence is (q+V) mod N, the absolute value of V is an integer greater than or equal to K1 and less than or equal to N-K1, K1>1; or, X is greater than or equal to 3 , The root index of the first ZC sequence is q, the root index of the second ZC sequence is (q+V) mod N, and the root index of the third ZC sequence that generates the third sequence is (q+ W) mod N, the absolute value of V is 1, the absolute value of W is greater than K2 and less than N-K2, K2>2, or the absolute value of V and the absolute value of W are greater than or equal to K3 and an integer less than or equal to N-K3, K3>1, the third sequence is any one of the X base sequences except the first sequence and the second sequence; the terminal The device sends the reference signal sequence.

According to the method provided in the embodiment of the present application, when a sequence group includes two base sequences, the absolute value of V is greater than 1 and less than N-1, that is, the lower limit of the value is greater than 1, and the upper limit of the value is less than N-1. Especially when the length N of the ZC sequence is large, the lower limit of the absolute value of the V is larger. There is N, and the absolute value of V is greater than 2. At this time, the network device may allocate two base sequences of the same length in a sequence group to different terminal devices at the same time, so that the number of reference signal sequences that can be allocated in one network device becomes twice the original. Increasing the number of reference signal sequences without increasing interference between reference signal sequences improves the accuracy of channel estimation based on the reference signals. Correspondingly, when a sequence group includes at least three base sequences of the same length, the network device can allocate the at least three base sequences in the sequence group to different terminal devices at the same time, which can make it possible for a cell The number of supported terminal devices that simultaneously send reference signals of the same length becomes at least three times the original. At the same time, since the root index of the ZC sequence that generates at least three base sequences of the same length in a sequence group is redesigned, the cross-correlation of the at least three base sequences in a sequence group is very low, making the reference The interference between signal sequences is much lower than that of signals, and the accuracy of channel estimation based on reference signal sequences can be improved compared to the prior art.

In a possible design, the i-th base sequence among the X base sequences satisfies the following formula:

Where s _i (m), m = 0, 1, ..., M-1 is the i-th base sequence,

To generate the ZC sequence of the i-th base sequence.

In a possible design, the method further includes:

The terminal device obtains first indication information and second indication information; the first indication information is used to indicate the group identifier of the first sequence group or the cell identifier of the first sequence group, and the second indication information Used to indicate one of the X base sequences;

The terminal device obtains the reference signal sequence according to the first indication information and the second indication information.

In a possible design, when the group identifier of the first sequence group is u1, the value of V is V1, and when the group identifier of the first sequence group is u2, the value of V is V2 , U1 and u2 are different, V1 and V2 are different;

Alternatively, when the cell identifier of the first sequence group is c1, the value of V is V1, and the value of V is V1. When the cell identifier of the first sequence group is c2, the value of V The value is V2, there are different c1 and c2, and V1 and V2 are different.

Through the above method, the value of V is related to the group identifier or cell identifier of the first sequence group, and it is helpful for the sequence group allocated by the network device, each sequence group includes the number of base sequences of length M There may be many, so that the same cell can support more terminal devices to send reference signal sequences on the same time-frequency resources, and ensure that the inter-sequence interference is small. For example, the above V1 and V2 can satisfy: V1=-V2, then a value V1 can be found, which ensures that the root index of the ZC sequence that generates the base sequence of all sequence groups (such as 30 sequence groups) is not repeated, and at the same time guarantees The cross-correlation of the base sequences in each sequence group is very low, and the cross-correlation of the base sequences of different sequence groups is not increased relative to the prior art. As another example, the absolute value of the above V1 is not equal to the absolute value of V2, and a value V1 and V2 can be found, in some sequence groups V=V1, in other sequence groups V=V2, which guarantees that all sequences are generated The root index of the ZC sequence of the base sequence of the group (for example, 30 sequence groups) is not repeated, while ensuring that the cross-correlation of the base sequence in each sequence group is very low, and the cross-correlation of the base sequences of different sequence groups is relatively Based on existing technology, it will not increase.

In a possible design, when the length of the first ZC sequence and the length of the second ZC sequence are both the first length, the value of V is V1, and the length of the first ZC sequence is When the length of the second ZC sequence is the second length, the value of V is V2; there is a difference between the first length and the second length, the absolute value of V1 and the absolute value of V2 different.

Through the above method, for different base sequence lengths M, the inter-sequence interference of base sequences of the same length located in the first sequence group can be very small. For all base sequences of different lengths, if the absolute values of the V all take the same value, it will result in little interference between the base sequences in the first sequence group when there are only a few values of length M However, under other values of length M, the interference between the base sequences in the first sequence group is greater. When the network device allocates the first sequence group to the terminal devices in the cell, the problem that the sequence interference between the terminal devices that send reference signal sequences of the same length is relatively large may occur. Therefore, under different base sequence lengths M, the absolute value of V has different values, which can make the sequence interference between multiple terminal devices transmitting any reference signal sequence of the same length in the same cell very small , While not increasing the intersequence interference of different sequence groups.

In a possible design, the absolute value of V is any integer in set A1 or set A2 or set A3 or set A4, and the relationship between set A1 or set A2 or set A3 or set A4 and N satisfies the table At least one line in 2. The content of Table 2 is specifically described in the example section, and will not be repeated here.

In a possible design, when X is an integer greater than or equal to 3, the V and the W satisfy the following formula:

W=-V; or, W=V/2; or, W=2V; or, V is an odd number, W=(N+V)/2; or, V is an odd number, W=(NV)/2; or , V is an odd number, W=-(NV)/2.

In a possible design, the absolute value of V is any integer in set S1 or set S2 or set S3 or set S4, and the relationship between set S1 or set S2 or set S3 or set S4 and N satisfies the table At least one line in 7. The content of Table 7 is specifically described in the example section, and will not be repeated here.

In a possible design, the root index q _i of the ZC sequence generating the i-th base sequence among the X base sequences satisfies at least one of the following formulas:

B is an integer greater than 1, u is an integer determined according to the group identifier of the first sequence group or the cell identifier of the first sequence group, and v _i is the set A={0,a ₁ ,...,a The elements in _X-1 }, a _i is an integer;

Where, when X is an integer greater than or equal to 2, | a _i | ≥ 2, i = 1, ..., X-1; or, when X is an integer greater than or equal to 3, | a _i | = 1, | a _j |≥3, i is an integer greater than or equal to 1 and less than or equal to X-1, j=1,..., X-1 and j is not equal to i; or X=3, the set

|a|≥1; or X=3, set

|a|≥1; or X=3, set A={0,a,-a},|a|≥2. Optionally, each element of the set A is various possible values of the absolute value of V.

In a second aspect, an embodiment of the present application provides a communication device including a processor coupled to a memory, wherein: the memory is used to store instructions; the processor is used to execute instructions stored in the memory to execute A method in the above first aspect or any possible design of the first aspect. Optionally, the communication device may further include the memory. Optionally, the communication device may further include a transceiver for supporting the communication device to send and/or receive information in the above method. Optionally, the communication device may be a terminal device, or a device in the terminal device, such as a chip or a chip system, wherein the chip system includes at least one chip, and the chip system may further include other circuit structures and/or Discrete devices.

In a third aspect, an embodiment of the present application provides a communication device for implementing the first aspect or any method in the first aspect, including a corresponding functional module, for example, including a processing unit, a transceiver unit, etc., respectively Implement the steps in the above method.

According to a fourth aspect, an embodiment of the present application provides a communication method, including: a network device sending configuration information, where 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 i-th base sequence of the X base sequences is generated by a ZC sequence of length N and root index q _i , q _i is an integer from 1 to N-1, and N is greater than 1. Integer, when i has a different value, q _{i has} a different value; where X is an integer greater than or equal to 2, the first of any two of the X base sequences corresponds to the first The root index of a ZC sequence is q, the root index of the second ZC sequence corresponding to the second sequence in any two base sequences is (q+V) mod N, and the absolute value of V is greater than or equal to K1 and An integer less than or equal to N-K1, K1>1; or, when X is an integer greater than or equal to 3, the root index of the first ZC sequence is q, and the root index of the second ZC sequence is (q+ V) mod N, the root index of the third ZC sequence that generates the third sequence is (q+W) mod N, the absolute value of V is 1, the absolute value of W is greater than K2 and less than N-K2, K2 >2, or the absolute value of V and the absolute value of W are integers greater than or equal to K3 and less than or equal to N-K3, K3>1, the third sequence is divided by the X base sequences Any base sequence other than the first sequence and the second sequence; the network device receives a reference signal sequence, and the reference signal sequence is a base sequence in the first sequence group.

According to the method provided in the embodiment of the present application, when a sequence group includes two base sequences, the absolute value of V is greater than 1 and less than N-1, that is, the lower limit of the value is greater than 1, and the upper limit of the value is less than N-1. Especially when the length N of the ZC sequence is large, the lower limit of the absolute value of the V is larger. There is N, and the absolute value of V is greater than 2. At this time, the network device may allocate two base sequences of the same length in a sequence group to different terminal devices at the same time, so that the number of reference signal sequences that can be allocated in one network device becomes twice the original. Increasing the number of reference signal sequences without increasing interference between reference signal sequences improves the accuracy of channel estimation based on the reference signals. Correspondingly, when a sequence group includes at least three base sequences of the same length, the network device can allocate the at least three sequences in the sequence group to different terminal devices at the same time, which can be supported in a cell The number of terminal devices that simultaneously send reference signals becomes at least three times the original. At the same time, since the difference between the root indexes of the ZC sequences that generate at least three base sequences of the same length in a sequence group is redesigned, the cross-correlation of the at least three base sequences in a sequence group is guaranteed to be very low , So that the interference between reference signal sequences is much lower than the signal, and the accuracy of channel estimation based on the reference signal sequence can be improved compared to the prior art. In a possible design, the i-th base sequence among the X base sequences satisfies the following formula:

Where s _i (m), m = 0, 1, ..., M-1 is the i-th base sequence,

To generate the ZC sequence of the i-th base sequence.

In a possible design, the method further includes:

The network device sends first indication information and second indication information; the first indication information is used to indicate the group identifier of the first sequence group or the cell identifier of the first sequence group, and the second indication information It is used to indicate one of the X base sequences.

In a possible design, when the group identifier of the first sequence group is u1, the value of V is V1, and when the group identifier of the first sequence group is u2, the value of V is V2 , There is a difference between u1 and u2, and V1 is different from V2; or, when the cell identifier of the first sequence group is c1, the value of V is V1, and the value of V is the first sequence group of V1 When the cell identifier of c2 is V2, the value of V is V2, and c1 and c2 are different, and V1 and V2 are different.

In a possible design, when the length of the first ZC sequence and the length of the second ZC sequence are both the first length, the value of V is V1, and the length of the first ZC sequence is When the length of the second ZC sequence is the second length, the value of V is V2; there is a difference between the first length and the second length, the absolute value of V1 and the absolute value of V2 different.

For different base sequence lengths M, the inter-sequence interference of base sequences of the same length in the first sequence group can be very small. For the base sequences of different lengths, for all base sequences of different lengths, if the absolute values of V all take the same value, it will result in only a few values of length M, the The interference between the base sequences is very small, and under other values of length M, the interference between the base sequences in the first sequence group is large. When the network device allocates the first sequence group to the terminal devices in the cell, the problem that the sequence interference between the terminal devices that send reference signal sequences of the same length is relatively large may occur. Therefore, under different base sequence lengths M, the absolute value of V has different values, which can make the sequence interference between multiple terminal devices transmitting any reference signal sequence of the same length in the same cell very small , While not increasing the intersequence interference of different sequence groups.

In a possible design, the absolute value of V is any integer in set A1 or set A2 or set A3 or set A4, and the relationship between set A1 or set A2 or set A3 or set A4 and N satisfies the table At least one line in 2. The content of Table 2 is specifically described in the example section, and will not be repeated here.

In a possible design, when X is an integer greater than or equal to 3, the V and the W satisfy the following formula:

W=-V; or, W=V/2; or, W=2V; or, V is an odd number, W=(N+V)/2; or, V is an odd number, W=(NV)/2; or , V is an odd number, W=-(NV)/2.

In a possible design, the absolute value of V is any integer in set S1 or set S2 or set S3 or set S4, and the relationship between set S1 or set S2 or set S3 or set S4 and N satisfies the table At least one line in 7. The content of Table 7 is specifically described in the example section, and will not be repeated here.

In a possible design, the root index q _i of the ZC sequence generating the i-th base sequence among the X base sequences satisfies at least one of the following formulas:

B is an integer greater than 1, u is an integer determined according to the group identifier of the first sequence group or the cell identifier of the first sequence group, and v _i is the set A={0,a ₁ ,...,a The elements in _X-1 }, a _i is an integer;

Where, when X is an integer greater than or equal to 2, | a _i | ≥ 2, i = 1, ..., X-1; or, when X is an integer greater than or equal to 3, | a _i | = 1, | a _j |≥3, i is an integer greater than or equal to 1 and less than or equal to X-1, j=1,..., X-1 and j is not equal to i; or X=3, the set

|a|≥1; or X=3, set

|a|≥1; or X=3, set A={0,a,-a},|a|≥2. Optionally, each element of set A is a possible value of the absolute value of V.

According to a fifth aspect, an embodiment of the present application provides a communication device. The communication device includes a processor. The processor is coupled to a memory. The memory is used to store instructions. The processor is used to execute instructions stored in the memory. The method in the above fourth aspect or any possible design of the fourth aspect is performed. Optionally, the communication device may further include the memory. Optionally, the communication device may further include a transceiver for supporting the communication device to send and/or receive information in the above method. Optionally, the communication device may be a network device, or a device in the network device, such as a chip or a chip system, wherein the chip system includes at least one chip, and the chip system may further include other circuit structures and/or Discrete devices.

According to a sixth aspect, an embodiment of the present application provides a communication device for implementing the above fourth aspect or any method in the fourth aspect, including corresponding functional modules, such as a processing unit, a transceiver unit, etc., respectively Implement the steps in the above method.

According to a seventh aspect, an embodiment of the present application provides a communication method, including:

The network device sends second configuration information, the second configuration information is used to configure a first sequence, and the first sequence is used to generate a reference signal sequence of length M, where M is an integer greater than 1; the network device receives the reference signal sequence from the terminal device .

Using the method provided in the embodiments of the present application, in a cell, a network device can indicate different base sequences to different terminal devices, so that different terminal devices can use different base sequences to generate reference signal sequences on the same time-frequency resource, which can reduce The transmission cycle of the reference sequence avoids the serious problem of outdated channel state information.

According to an eighth aspect, an embodiment of the present application provides a communication method, including:

The terminal device receives the second configuration information from the network device, and generates a reference signal sequence of length M according to the first sequence indicated by the second configuration information, where M is an integer greater than 1; the terminal device sends the reference signal sequence.

In the above method, different terminal devices can simultaneously use different base sequences to generate reference signal sequences, which can shorten the interval at which the terminal device sends the reference signal sequence and avoid the problem of outdated channel state information.

With reference to the above aspects or possible designs in each aspect, in a possible design, the first sequence is one of H base sequences, and H is an integer greater than 30.

Combining the above aspects or possible designs in each aspect, in a possible design, the hth base sequence of the H base sequences is made of length N and the root index is

Generated by the ZC sequence,

It is an integer from 1 to N-1. N is an integer greater than 1. When the value of _h is different, the value of q _h is different.

With reference to the above aspects or possible designs in various aspects, in a possible design, the h-th base sequence among the above H base sequences satisfies the following formula:

Among them, s _h (m), m = 0, 1, ..., M-1 is the h-th base sequence,

To generate the ZC sequence of the h-th base sequence.

With reference to the above aspects or possible designs in various aspects, in a possible design, the above H base sequences include H ₀ base sequences, H ₀ is an integer, and 30<H ₀ ≤H, in H ₀ base sequences The i-th base sequence of is composed of a length N and a root index of

Generated by the ZC sequence,

Is an integer from 1 to N-1, N is an integer greater than 1, when the value of i is different,

Value is different.

In a possible implementation, H>30,

The value of belongs to the set

Where B is a positive integer,

Reason

Determined integer,

It is an integer from 0 to N-1, and V is an integer. The absolute value of V is an integer greater than or equal to K1 and less than or equal to N-K1, and K1>1.

In another possible implementation, H>60,

The value of belongs to the set

Where B is a positive integer,

Reason

Determined integer,

An integer from 0 to N-1, the absolute value of V is 1, the absolute value of W is greater than K2 and less than N-K2, K2>2, or the absolute value of V and W are greater than or equal to K3 and less than or equal to The integer of N-K3, K3>1.

With reference to the above aspects or possible designs in each aspect, in a possible design, when the H base sequences corresponding to the H length ZC sequences of the first length, the value of V is V1, the H When there are H ZC sequences with a second length corresponding to a base sequence, the value of V is V2; there is a difference between the first length and the second length, and the absolute value of V1 is different from the V2 The absolute value of is different.

With reference to the above aspects or possible designs in various aspects, in a possible design, when H is an integer greater than 60, the V and the W satisfy the following formula:

W=-V; or, W=V/2; or, W=2V; or, V is an odd number, W=(N+V)/2; or, V is an odd number, W=(NV)/2; or , V is an odd number, W=-(NV)/2.

In a ninth aspect, an embodiment of the present application provides a communication device. The communication device includes a processor, and the processor is coupled to a memory. The memory is used to store instructions. The processor is used to execute instructions stored in the memory. Implementing the above seventh aspect or any possible design of the seventh aspect, or the method of the eighth aspect or any possible design of the eighth aspect. Optionally, the communication device may further include the memory. Optionally, the communication device may further include a transceiver for supporting the communication device to send and/or receive information in the above method. Optionally, the communication device may be a network device or a terminal device, or may be a device in a network device or a device in a terminal device, such as a chip or a chip system, wherein the chip system includes at least one chip, and the chip system Other circuit structures and/or discrete devices may also be included.

According to a tenth aspect, an embodiment of the present application provides a communication device for implementing the seventh aspect or any one of the possible designs of the seventh aspect, or the eighth aspect or any of the possible designs of the eighth aspect The method, including corresponding functional modules, including, for example, a processing unit, a transceiver unit, etc., is used to implement the steps in the above method, respectively.

Embodiments of the present application provide a computer-readable storage medium that stores computer-readable instructions. When a computer reads and executes the computer-readable instructions, the communication device causes the communication device to execute any of the above possible Method in design.

An embodiment of the present application provides a computer program product that, when a computer reads and executes the computer program product, causes a communication device to perform any of the above-mentioned methods in possible designs.

An embodiment of the present application provides a chip that is connected to a memory and used to read and execute a software program stored in the memory to implement any one of the above-mentioned possible design methods.

An embodiment of the present application provides a communication system, including the communication device in the second aspect and the communication device in the fifth aspect.

BRIEF DESCRIPTION

1 is a schematic flowchart of a communication method provided by an embodiment of this application;

2 is a schematic structural diagram of a terminal device according to an embodiment of this application;

3 is a schematic structural diagram of a terminal device according to an embodiment of this application;

4 is a schematic structural diagram of a network device according to an embodiment of this application;

5 is a schematic structural diagram of a network device according to an embodiment of this application;

FIG. 6 is a schematic flowchart of a communication method provided by an embodiment of the present application.

detailed description

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

The embodiments of the present application can be applied to various mobile communication systems, such as: new radio (NR) system, global mobile communication (GSM) system, code division multiple access (CDMA) ) System, wideband code division multiple access (WCDMA) system, general packet radio service (general packet radio service, GPRS), long term evolution (LTE) system, advanced long term evolution (advanced long) Term-evolution (LTE-A) system, universal mobile communication system (universal mobile telecommunication system, UMTS), evolved long-term evolution (evolved long term evolution, eLTE) system, future communication system and other communication systems, specifically, not here Do restrictions.

In the embodiments of the present application, the terminal device may be a device with wireless transceiver function or a chip that can be installed in any device, and may also be called a user equipment (UE), an access terminal, a user unit, and a user station , Mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, wireless communication device, user agent or user device. The terminal devices in the embodiments of the present application may be mobile phones, tablet computers, computers with wireless transceiver functions, virtual reality (virtual reality, VR) terminals, augmented reality (augmented reality, AR) terminals, industrial Wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grids, transportation safety The wireless terminal in the smart phone, the wireless terminal in the smart city (smart city), the wireless terminal in the smart home (smart home), etc.

The network equipment may be an evolved base station (evolutional node B, eNB) in the LTE system, a global mobile communication (GSM) system or a code division multiple access (CDMA) A base station (base transceiver) (BTS) can also be a base station (nodeB, NB) in a wideband code division multiple access (wideband code division multiple access, WCDMA) system.

With reference to the foregoing description, as shown in FIG. 1, it is a schematic flowchart of a communication method provided by an embodiment of the present application. Referring to Figure 1, the method includes:

Step 101: The network device sends configuration information, where the configuration information is used to configure the first sequence group.

The specific implementation manner of the configuration information is not limited in this embodiment of the present application, and details are not described herein again.

Step 102: The terminal device generates a reference signal sequence of length M.

Where M is an integer greater than 1; the reference signal sequence is generated by a base sequence of length M in the first sequence group assigned to the terminal device, and the length of the first sequence group is M The number of base sequences is X, and the i-th base sequence in the X base sequences is generated by a ZC sequence of length N and root index q _i , where q _i is an integer from 1 to N-1 , N is an integer greater than 1, and the value of q _i is different when the value of _i is different; where X is an integer greater than or equal to 2, the first of any two of the X base sequences The root index of the first ZC sequence corresponding to a sequence is q, and the root index of the second ZC sequence corresponding to the second sequence in any two base sequences is (q+V) mod N, and the absolute value of V Is an integer greater than or equal to K1 and less than or equal to N-K1, K1>1; or, when X is an integer greater than or equal to 3, the root index of the first ZC sequence is q, and the root index of the second ZC sequence Is (q+V)mod N, the root index of the third ZC sequence that generates the third sequence is (q+W)mod N, the absolute value of V is 1, the absolute value of W is greater than K2 and less than N -K2, K2>2, or the absolute value of V and the absolute value of W are integers greater than or equal to K3 and less than or equal to N-K3, K3>1, the third sequence is the X bases Any base sequence except the first sequence and the second sequence in the sequence.

In a first possible implementation manner, the base sequence in the first sequence group may be allocated to different terminal devices in a cell, that is, the base sequence in the first sequence group is used for determination by different terminal devices in the same cell Reference signal. The advantage of this implementation is that allocating the X base sequences included in the first sequence group proposed by the present invention to terminal devices in the same cell can ensure that the mutual interference of reference signals of different terminal devices in the cell is greatly reduced and improved Channel estimation accuracy.

In a second possible implementation manner, the base sequence in the first sequence group may be allocated to terminal devices in different cells. For example, the base sequence 1 in the first sequence group may be used for terminal device determination in cell 1 For reference signals, the base sequence 2 in the first sequence group can be used for the terminal device in cell 2 to determine the reference signal, where cell 1 and cell 2 are two different cells. Or, base sequences in different base sequence groups may be allocated to terminal devices in the same cell. For example, the X base sequences in the first sequence group are used by some terminal devices in cell 1 to determine reference signals, and the X′ base sequences in the second sequence group are used by another part of cell devices in cell 1 to determine reference signals . At this time, the first sequence group does not correspond to a specific cell, and a network device determines which sequence in the first sequence group is used for which terminal devices of which cells determine reference signals.

Regardless of the above implementation, the X base sequences in the first sequence group have the same group index. In the first implementation manner described above, base sequences with the same group index belong to a base sequence group. For example, currently 3GPP defines 30 base sequence groups, the first implementation maintains 30 base sequence groups, but the number of base sequences of the same length in each base sequence group increases to X>1, and these X bases The sequence can be allocated to terminal devices that send reference signals on the same time-frequency resource, rather than being used by a certain terminal device to skip the sequence at different times. In the above second implementation manner, base sequences with the same group index belong to different base sequence groups. For example, currently 3GPP defines 30 base sequence groups, and the second implementation method increases the base sequence groups to 30*X. The number of base sequences of the same length in each base sequence group is still one, and network devices can use different base sequences. The base sequences in the sequence group are allocated to terminal equipment in the same cell. At this time, the preferred solution is that the network device allocates base sequences with the same group index among different base sequence groups to terminal devices in the same cell.

Let u denote the group index of the first sequence group, then the network device can configure u in various ways. In one implementation, u may be determined according to the sequence index. For example, define u=I mod L1, that is, u ∈ {0,1,...,L1-1}, where I represents the sequence index (sequenceId) of the first sequence in the first sequence group, and the value range of I It may be 0-1023, or 0-2047, or other value ranges, which are not limited in the embodiments of the present application. That is, the sequence index corresponding to the base sequence in the same sequence group modulo L1 has the same result. L1 is a positive integer, for example, L1=30. It should be understood that the above sequence index may be configured by the network device through terminal-specific signaling. In another implementation, u may be determined according to the cell index. For example, define u=J mod L2, that is, u ∈ {0,1,...,L2-1}, where J represents the cell index, and the value range of J can be 0～503, or 0～1023, or It is another value range, which is not limited in the embodiments of the present application. That is, the cell index corresponding to the base sequence in the same sequence group modulo L2 has the same result. L2 is a positive integer, for example, L2=30. The cell index can be configured by the network device through cell-specific signaling.

It should be noted that the first sequence group may include multiple base sequences of different lengths. For example, the first sequence group includes X1 base sequences of length M1, and also includes X2 base sequences of length M2, where M1 is not equal to M2. The terminal device may determine the base sequence under the length of each reference signal sequence according to the first sequence group. Optionally, the terminal device determines the length M of the reference signal sequence by further receiving configuration information, so as to determine the X base sequences to which the terminal device is allocated under the length M.

It should be noted that, the first sequence group allocated to the terminal device may be a first sequence group assigned by the network device through terminal device-specific signaling (such as dedicated radio resource control (RRC) signaling). The base sequence assigned to the terminal equipment may also be network equipment through cell-level signaling (such as cell-specific RRC signaling, system information block (SIB) signaling, master information block (master information) block, MIB, signaling, etc.) The base sequence of the first sequence group is uniformly allocated to multiple terminal devices in the cell served by the network device, and thus allocated to the terminal device. This embodiment of the present application is not limited to this, and details are not described herein again.

It should be noted that the first sequence group allocated to the terminal device is characterized in that a group of base sequences is allocated to the terminal device. Wherein, the set of base sequences is a sequence potentially used by the terminal device to generate a reference signal sequence. Optionally, the terminal device may further determine the base sequence on which the reference signal sequence sent at a certain moment is generated through other configuration information.

It should be noted that 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 rather that the terminal device can be based on a predefined The rules and other signaling configurations can generate a reference signal sequence to be transmitted according to any one of the X base sequences when needed.

It should be noted that the first sequence and the second sequence are any two of the X base sequences, which means that any two sequences in the X base sequences are arbitrarily selected as the first In the sequence and the second sequence, if the root index of the first ZC sequence that generates the first sequence is q, the root index of the second ZC sequence that generates the second sequence can be written as (q+V) mod N. That is, the root index of the ZC sequence that generates any two base sequences satisfies this relationship.

It should be noted that the first ZC sequence corresponding to the first sequence of any two of the X base sequences corresponds to the first ZC sequence corresponding to the first sequence refers to generating the first sequence The first ZC sequence. The "correspondence" here refers to this relationship of generating a base sequence from a ZC sequence. Similarly, the second ZC sequence corresponding to the second sequence in any two base sequences refers to the second ZC sequence that generates the second sequence. I will not repeat them later.

Step 103: The terminal device sends the reference signal sequence.

Step 104: The network device receives the reference signal sequence, and the reference signal sequence is a base sequence in the first sequence group.

In the embodiment of the present application, the first sequence group allocated by the network device to the terminal device is determined from L sequence groups, and L is an integer greater than or equal to 2. Optionally, L=30 or L=60. Among the L sequence groups, at least one sequence group includes X base sequences of length M, and the number of base sequences of length M included in different sequence groups may be the same or different, which is not limited in the embodiments of the present application . In the at least one sequence group, X base sequences of length M are generated by ZC sequences of the same length and different root indexes. For example, the i-th base sequence s _i (m) in the X base sequences of length M of the first sequence group, m=0, 1, ..., M-1 is composed of the length N and ZC sequence with root index q _i

The specific formula is:

Among them, j ² = -1.

Optionally, in the embodiment of the present application, the L sequence groups have different sequence group identifiers, or cell identifiers. The terminal device obtains the sequence group identifier or cell identifier of the first sequence group by receiving the first indication information. According to the group identifier or cell identifier of the first sequence group, the terminal device may determine a set of base sequences allocated to itself, and this set of base sequences may include multiple length base sequences, where the length is the M base sequence number The number is X. Optionally, the terminal device may substitute the group identifier or the cell identifier according to the formula for generating the reference signal sequence to obtain a set of base sequences allocated to itself, or obtain the reference signal sequence. Or, the terminal device obtains a set of base sequences allocated to itself according to the predefined table and the first instruction information. For example, the predefined table defines one or more base sequences included in each sequence group, and the terminal device learns the X base sequences through the first indication information. Or, the pre-defined table defines the root index of the ZC sequence included in each sequence group to generate one or more base sequences of the sequence group, and the terminal device knows the ZC that generates the X base sequences through the first indication information Serial root indicator.

It should be understood that if the base sequences in the same sequence group are only allocated to terminal devices in the same cell, the group identity may be determined according to the cell identity. The above-mentioned terminal device may acquire the group identity or the cell identity. If the base sequences in the same sequence group can be assigned to different cell terminal devices, the group ID is not equal to the cell ID, and the above terminal device needs to obtain the sequence ID or group ID to determine the ZC sequence root index for generating the X base sequences .

Optionally, the ZC sequence root index q _i for generating the i-th base sequence in the X base sequences satisfies:

q _i =(f(u)+V)mod N, or q _i =(f(u)-V)mod N,(2)

Where u is the group ID or cell ID of the first sequence group, f(u) is an integer determined according to u, V is an element in the set S, and the set S includes only X different elements V ₁ , V ₂ ..., V _X. Then, the network device notifies the value of u through the first signaling, that is, X base sequences are allocated to the terminal device. Optionally, when the value of u is different, the elements contained in the set S may be different.

Optionally, in the embodiment of the present application, the terminal device further obtains the reference signal sequence by receiving second indication information. According to the first indication information, the terminal device is assigned the X base sequences. Further, according to the second instruction information, the terminal device determines a base sequence from the X base sequences to generate the reference signal sequence. The parameter α used for generating the reference signal sequence from the base sequence may be further notified by the network device through other signaling. For example, when the terminal device generates the reference reference signal sequence, the root index of the ZC sequence that generates the base sequence of the reference signal sequence is characterized by a first parameter and a second parameter, where the first parameter is based on the first indication information The indicated sequence group identifier or cell identifier is determined, and the second parameter belongs to a set including only X elements, and is determined according to the second indication information. For example, in the above formula (2), the value of V can be determined according to the second indication information. For another example, the second indication information indicates that, among the X base sequences of the first sequence group, the identifier of the base sequence of the reference signal sequence is generated, or the identifier of the root index of the ZC sequence of the base sequence is generated. For example, the pre-defined table described above defines the root index of the ZC sequence included in each sequence group to generate one or more base sequences of the sequence group, and the terminal device determines the X root indexes through the first indication information And determine the root index used to generate the reference signal sequence through the second indication information.

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

With reference to the above description, in the embodiment of the present application, the terminal device obtains the reference signal sequence according to the first indication information and the second indication information. The first indication information is used to indicate the group identifier of the first sequence group or the cell identifier of the first sequence group, and the second indication information is used to indicate one of the X base sequences.

Optionally, the root index q of the ZC sequence that generates the base sequence of the reference signal sequence satisfies the following formula:

Where, B is an integer greater than 1, for example, B may be 31 or 71; u is a natural number determined according to the group ID or cell ID of the first sequence group, for example, u is the group ID or location of the first sequence group The cell identifier of the first sequence group. Δ is an integer determined according to the second indication information, or an integer determined according to the first indication information and the second indication information,

Means round down. For example, the second indication information indicates a sequence identifier of a base sequence of the X base sequences of the first sequence group or an identifier of a root index of a ZC sequence that generates the base sequence, and the terminal device uses the sequence identifier Or the root index identification determines the parameter Δ, for example, the sequence identification from small to large corresponds to the value of the parameter Δ from small to large. Alternatively, the second indication information indicates a value from the X values of the parameter V, X is greater than 1, and Δ has a predefined relationship with V. Optionally, the X values of V include 0. Alternatively, Δ can be determined according to V by any of the following formulas:

1) Δ=V;

2) Δ=-V;

3) Δ=V×(-1) ^f(u,N)

4) Δ=-V×(-1) ^f(u,N) ;

Among them, f (u, N) is an integer determined according to u and N. Optional,

Or f(u,N) adopts other forms, which are not limited in the embodiments of the present application.

Further, for example, in combination with the above formula, the root index q can satisfy any of the following formulas:

1)

2)

3)

4)

Of course, the above is just an example, and q and Δ can also be determined in other ways, which will not be repeated here.

Optionally, the root index q _i of the ZC sequence of the i-th base sequence among the X base sequences satisfies at least one of the following:

B is an integer greater than 1, u is an integer determined according to the group identifier of the first sequence group or the cell identifier of the first sequence group, and v _i is the set A={0,a ₁ ,...,a Elements in _X-1 }, a _i is an integer; where, when X is an integer greater than or equal to 2, | a _i | ≥ 2, i=1, ..., X-1; or, when X is greater than or equal to 3 , An integer of |a _i |=1, |a _j |≥3, i is an integer greater than or equal to 1 and less than or equal to X-1, j=1,.. ., X-1 and j is not equal to i; or X = 3, set

|a|≥1; or X=3, set

|a|≥2; or X=3, set A={0,-a,a},|a|≥2. Optionally, each element of set A is a possible value of the absolute value of V.

It should be noted that the base sequence of each sequence group in the above L>=2 sequence groups is generated by the ZC sequence, and the root index of the ZC sequence that generates different base sequences is different. Therefore, each base sequence can be considered All correspond to the root indicators of a ZC sequence. Therefore, the root index group can also be defined equivalently, that is, the root index of the ZC sequence corresponding to the base sequence of the same sequence group belongs to the same root index group, or the base sequence corresponding to the root index of the same root index group belongs to the same A sequence group. Therefore, the L sequence groups correspond to L root index groups, and each root index group includes one or more root indexes. Then, the first sequence group corresponds to the first root index group, and the number of root indexes of the ZC sequence used to generate the base sequence of length M in the first root index group is X. The first index group may include root indexes of ZC sequences that generate base sequences of different lengths. Optionally, the L root index groups have different root index group IDs, or cell IDs.

Therefore, for convenience of description, in the embodiment of the present application, the group identifier of the sequence group where each base sequence is located and the group identifier of the root indicator group where the root indicator corresponding to the base sequence is located are equivalent definitions. For this reason, in the embodiment of the present application, the group identifier of the first sequence group may refer to the group identifier of the first sequence group in the at least two sequence groups, or may refer to any base sequence in the first sequence group The group ID of the corresponding root index in at least two root index groups. Further, the second indication information may be the sequence identifier of the base sequence generating the reference signal sequence in the first sequence group, or the root index corresponding to the base sequence generating the reference signal sequence in the first root index The root index identifier in the group is used to obtain the base sequence for generating the reference signal sequence from the X base sequences in the first sequence group, or determine and generate the X root index from the first root index group The root index of the ZC sequence of the base sequence of the reference signal sequence, thereby determining the base sequence that generates the reference signal sequence.

In the embodiment of the present application, when the number X of base sequences of length M in the first sequence group is different, the root indexes of the ZC sequences that generate the X base sequences may have different characteristics, which will be described separately below.

In a first possible scenario, the first sequence group includes 2 sequences.

In this scenario, when the length of the first ZC sequence and the length of the second ZC sequence are both the first length, the value of V is V1, and the length of the first ZC sequence is the same as the first When the lengths of the two ZC sequences are both the second length, the value of V is V2; there is a difference between the first length and the second length, and the absolute value of V1 is different from the absolute value of V2, that is, there is N1≠N2, such that the absolute value of V1≠the absolute value of V2, N1 is the first length, and N2 is the second length.

The beneficial effect of this is that for different base sequence lengths M, the inter-sequence interference of base sequences of the same length located in the first sequence group can be very small. For the base sequences of different lengths, for all base sequences of different lengths, if the absolute values of V all take the same value, it will result in only a few values of length M, the The interference between the base sequences is very small, and under other values of length M, the interference between the base sequences in the first sequence group is large. When the network device allocates the first sequence group to the terminal devices in the cell, the problem that the sequence interference between the terminal devices that send reference signal sequences of the same length is relatively large may occur. Therefore, under different base sequence lengths M, the absolute value of V has different values, which can make the sequence interference between multiple terminal devices transmitting any reference signal sequence of the same length in the same cell very small , While not increasing the intersequence interference of different sequence groups.

When the base sequences in the same sequence group are allocated to the terminal devices of the same cell, the number of terminal devices that can simultaneously transmit reference signals of the same length in each cell becomes at least twice the original number. At the same time, the number of sequences 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, so that the interference between the reference signal sequences is much lower than that of the signal. It is conducive to flexible network planning and improves the channel measurement accuracy of network devices based on reference signal sequences.

When base sequences in the same sequence group are allocated to terminal devices in the same or different cells, there are at least 60 base sequences in the entire network for flexible scheduling. For example, for a cell with a small number of terminal devices, one base sequence can be allocated For cells with a large number of terminal devices, multiple base sequences can be allocated. In this case, a possible implementation method is to allocate the base sequences in the same sequence group to different terminal devices in the same cell as much as possible. In a cell with a large number of terminal devices, the bases in multiple sequence groups can be The sequence is allocated to the terminal equipment in the cell.

Optionally, when the length of the first ZC sequence is N, there is N such that the absolute value of V is greater than 3.

The beneficial effect of this is that, among the base sequences of a larger length in the first sequence group, the interference between base sequences of the same length is small, which can cause the reference signal sequence of a longer length to be transmitted in the same cell The sequence interference between multiple terminal devices is very small.

Optionally, when the length of the first ZC sequence and the length of the second ZC sequence are both the first length, the value of V is V1, and the length of the first ZC sequence and the second When the length of the ZC sequence is all the second length, the value of V is V2; the existence of the first length is greater than the second length, so that the absolute value of V1 is greater than the absolute value of V2, that is, there is N1>N2, such that the absolute value of V1>the absolute value of V2, N1 is the first length, and N2 is the second length.

The beneficial effect of this is that for different base sequence lengths M, the inter-sequence interference of base sequences of the same length located in the first sequence group can be very small. For the base sequences of different lengths, for all base sequences of different lengths, if the absolute values of V all take the same value, it will result in only a few values of length M, the The interference between the base sequences is very small, and under other values of length M (especially the larger M), the interference between the base sequences in the first sequence group is large. When the network device allocates the first sequence group to the terminal devices in the cell, the problem that the sequence interference between the terminal devices that send reference signal sequences of the same length is relatively large may occur. Therefore, under different base sequence lengths M, the absolute value of V has different values, which can make the sequence interference between multiple terminal devices transmitting any reference signal sequence of the same length in the same cell very small .

Optionally, when the group identifier of the first sequence group is u1, the value of V is V1, and when the group identifier of the first sequence group is u2, the value of V is V2, and u1 exists Unlike u2, V1 is different from V2. That is, the value of V is related to the group identifier of the first sequence group.

The beneficial effect of this is that even for a large value of L, the root index of the ZC sequence that generates the base sequence of all sequence groups is not repeated, and at the same time, for each base sequence length M, each sequence in the L sequence groups The number of base sequences of length M included is as much as possible, which helps to support more terminal devices in the same cell to send reference signal sequences on the same time-frequency resources and ensure that the inter-sequence interference is small. For example, in the above formula for determining q

, Let the root index of the first ZC sequence be

Then if the root index of the second ZC sequence is determined by the formula Δ=V×(-1) ^f(u,N) or Δ=-V×(-1) ^f(u,N) , then Δ and group Mark u related. Under some group identifications, Δ=V, and under other group identifications, Δ=-V. As another example, for the length N of a ZC sequence, there may be K V values V ₁ , V ₂ ,..., V _K , such that the generated based on the root index q ₁ and (q ₁ +V _k ) mod N The intersequence interference of the 2 base sequences of the first sequence group is sufficiently low, where K is an integer greater than 1,

i, j, and k are integers greater than or equal to 1 and less than or equal to K, and i and j are not the same.

Represents the absolute value of V, ie if V ≥ 0,

If V<0,

In this case, there may be a case when only either of them using the values V V _I, L can not find a set of base sequences, each sequence group comprising meet two base sequence, and generates a set of basis sequence L The root index of the ZC sequence is not repeated, especially when L is large, for example, L=30. This will cause terminal devices in different cells to generate reference signal sequences of the same length based on the same base sequence, resulting in large inter-cell interference between reference signal sequences. At this time, in some sequence groups, a certain V _{i is} used to design the sequence of the group, and in other sequence groups, another V _{j is} used to design the sequence of the group, which can cause the generation of the L group sequence. The root index of the ZC sequence is not repeated, to avoid the interference of the reference signal sequence caused by the terminal equipment in the neighboring cell.

Optionally, when the group identifier of the first sequence group is u1, the value of V is V1, and when the group identifier of the first sequence group is u2, the value of V is V2, which satisfies Any u1 is not equal to u2, and V1 is the same as V2, that is, the value of V is independent of the group identifier of the first sequence group.

Optionally, when the cell identifier of the first sequence group is c1, the value of V is V1, and when the cell identifier of the first sequence group is c2, the value of V is V2, and c1 exists Unlike c2, V1 is different from V2, that is, the value of V is related to the cell identifier of the first sequence group.

In this scenario, any two base sequences in the same sequence group among the L sequence groups, so that the root indexes of the two ZC sequences that generate the any two base sequences are q and (q+V, respectively) ) mod N, then the length N of the V and ZC sequences can be associated. For convenience of description, the following uses X base sequences in the first sequence group as an example for description, and other details will not be repeated.

In a first possible implementation manner, for the first sequence and the second sequence of the X base sequences, the root index of the first ZC sequence that generates the first sequence is q, and the second ZC sequence that generates the second sequence The root index of (q+V) mod N, then the absolute value of V

Is an integer in set A1 or set A2 or set A3 or set A4, ie

or

The relationship between set A1 or set A2 or set A3 or set A4 and N satisfies at least one row in Table 2 below. Optionally, in one of the following four formulas, at least one formula may be used to determine the root index q _{1 of} the first ZC sequence and the root index q _{2 of} the second ZC sequence:

Among them, i=1, 2, v ₁ =0,

u is the group ID or cell ID of the first sequence group, and B is an integer greater than 1, for example, B=31.

Table 2

N	A1	A2	A3	A4
71	31,27,15	27,28,20	20,28,4	35,24
83	7,34,4	20,2,10	2,38,36	41,28
107	4,51,34	37,22,4	49,26,30	53,36
113	54,5,27	46,3,39	3,48,13	56,30
139	5,6,29	4,48,5	4,59,3	2,47,41
167	80,6,7	23,68,6	4,18,47	2,55,36
191	8,7,91	66,5,33	5,93,28	2,57,63
211	101,9,8	6,83,29	6,5,103	104,3,52
239	38,10,115	7,94,115	6,7,117	3,118,59
241	10,115,116	7,116,98	6,7,95	3,119,61
251	10,120,11	86,7,122	122,7,6	3,124,62
257	123,10,11	9,62,7	125,7,6	3,127,34
263	126,11,10	8,9,107	7,128,6	3,130,58
269	11,129,10	8,37,7	7,131,92	3,133,91
271	11,130,10	8,7,93	7,132,115	3,134,89
277	11,10,12	109,8,95	7,135,8	3,91,4
281	11,135,12	8,10,97	7,8,137	4,3,139
283	45,11,136	8,10,97	8,7,138	4,93,3
311	149,13,12	150,9,151	8,151,9	4,105,21
359	172,13,14	11,173,123	9,10,175	177,5,4
383	15,183,16	13,11,186	10,186,9	5,189,126
431	17,206,18	208,13,15	11,12,210	6,5,213
449	18,215,216	14,15,13	12,218,11	6,5,24
457	18,219,20	14,13,222	12,222,13	6,5,226

461	221,19,18	14,13,16	12,224,13	6,5,228
463	161,19,222	14,16,13	12,225,13	6,5,229
467	19,224,17	14,16,225	12,227,13	6,5,231
487	233,20,19	15,235,14	13,237,12	6,240,160
491	235,20,236	15,14,237	13,239,14	6,242,7
499	20,239,18	17,242,15	13,243,14	6,246,7
503	20,241,22	17,244,15	13,14,245	248,6,7
509	177,20,244	17,15,247	13,14,248	7,251,6
521	21,249,250	16,205,15	14,13,253	7,257,6
523	21,250,19	16,15,18	14,254,13	7,258,6
541	259,22,86	18,261,16	263,14,15	7,267,178
547	22,262,87	17,264,16	266,14,15	7,270,6
557	22,267,23	269,17,270	15,14,271	7,275,183
563	23,269,270	19,16,273	15,274,14	7,278,8
569	23,272,273	19,276,17	15,277,16	7,281,8
571	23,273,25	19,277,17	15,278,16	7,282,8
619	25,296,27	19,299,21	301,16,17	8,7,305
661	316,27,26	22,319,20	18,17,321	9,8,326
719	344,29,250	24,22,347	18,19,350	9,355,10
761	364,31,30	24,369,367	370,19,20	10,9,376
787	32,377,31	26,380,24	21,20,383	10,388,11
811	388,33,282	25,27,393	22,21,394	11,10,400
863	413,35,34	27,417,29	23,22,420	11,426,12
911	436,37,36	28,440,30	23,443,24	12,11,450
953	456,38,39	32,30,29	24,26,25	12,13,470
967	39,463,38	30,32,467	26,25,470	13,12,477
971	39,465,35	30,469,32	26,25,472	13,12,479
977	39,468,467	472,30,31	26,25,475	13,482,12
983	39,40,470	475,33,31	25,478,26	13,485,12
991	40,474,39	479,31,33	25,482,27	13,12,489
997	40,477,36	31,33,481	27,485,25	13,12,492
1009	483,40,41	31,34,32	27,491,26	13,498,14
1013	485,41,40	34,32,31	27,26,493	13,500,14
1019	41,488,487	34,32,492	26,27,28	13,14,503
1021	41,489,355	32,34,493	26,27,28	13,14,504
1031	41,493,42	32,498,34	26,28,27	13,14,509
1033	41,494,42	32,499,34	28,26,27	13,14,510
1039	497,42,41	502,32,35	28,26,27	13,14,513
1049	42,502,43	507,35,33	28,510,27	14,13,518
1051	42,503,43	508,35,33	28,511,27	14,13,519
1103	44,528,45	533,34,37	28,30,29	14,15,544
1151	46,551,47	36,556,38	31,29,560	15,14,568
1237	592,50,49	598,39,38	33,31,602	16,17,15
1291	52,618,51	40,624,43	35,628,33	17,16,637
1297	52,621,451	627,40,43	35,33,631	17,16,640
1301	52,623,53	629,40,41	35,33,633	17,16,642
1303	52,624,53	630,41,40	35,33,634	17,16,643
1307	52,53,625	41,44,40	33,35,636	17,18,645
1319	53,631,632	41,44,637	35,36,33	17,18,16
1321	53,632,54	41,44,638	36,35,34	17,18,16

1327	635,53,54	41,44,641	36,34,35	17,16,18
1439	58,689,57	45,48,695	39,700,36	18,19,710
1531	61,733,62	740,48,51	41,39,745	20,19,21
1583	63,64,758	49,765,53	40,770,43	21,20,781
1627	65,779,66	51,786,54	44,41,43	21,22,20

For example, when N is 113, the V=3 is an integer in the set A2 or A3. When N is 191, the V=5 is an integer in the set A2 or A3.

The beneficial effect of this is that the cross-correlation of sequences with different truncation lengths can be optimized to ensure that under the truncation length, the cross-correlation between the base sequences of the same sequence group is very low, that is, the inter-sequence interference is very low. Does not increase the interference between the base sequences of different sequence groups. When receiving the reference signal sequence sent by the terminal device, the network device may perform subsequent processing, such as channel estimation, based on the truncated sequence of the reference signal sequence to match the coherent bandwidth of the channel. Optionally, set A1 to set A4 may correspond to different truncation lengths, for example, set A1 corresponds to a cutoff length of 24, set A2 corresponds to a cutoff length of 30, set A3 corresponds to a cutoff length of 36, and set A4 corresponds to a cutoff length Is 72. Of course, the above is only an example, and sets A1 to A4 may also correspond to other truncated lengths, which will not be repeated here. The embodiments of the present application consider the truncation lengths commonly used in actual systems, such as 24, 30, 36, etc., to ensure that the base sequences located in the same sequence group still have very little inter-sequence interference under the truncation length used by the actual system, and at the same time Does not increase the intersequence interference of different sequence groups.

For example, when the network device L=30 sequence groups are assigned a first sequence group to the terminal device, where each sequence group includes two base sequences. The N is 139. According to Table 2, V=4. At this time, among the 30 groups of sequences, the relationship between the root index of the ZC sequence that generates two base sequences per group and the group identifier u may be as shown in Table 3-1.

Table 3-1

u	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14
q 1	4	9	13	18	twenty two	27	31	36	40	45	49	54	58	63	67
q 2	8	5	17	14	26	twenty three	35	32	44	41	53	50	62	59	71
u	15	16	17	18	19	20	twenty one	twenty two	twenty three	twenty four	25	26	27	28	29
q 1	72	76	81	85	90	94	99	103	108	112	117	121	126	130	135
q 2	68	80	77	79	86	98	95	107	104	116	113	125	122	134	131

In Table 3-1, there are 30 sets of root indexes, and each set of root indexes includes two root indexes, q ₁ and q ₂ , respectively. The two root indexes in the i-th root index are the root indexes of the ZC sequence that generates the two base sequences of the i-th base sequence group. u is the sequence group ID or the group ID of the root index group. As described above, the group ID of the first sequence group may be the same as the group ID of the root index group corresponding to the base sequence in the first sequence group.

For another example, when N is 113 and V=3, the relationship between the root index of the ZC sequence that generates two base sequences in each group and the group identifier u in the 30 groups of sequences may be as shown in Table 3-2.

Table 3-2

u	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14
q 1	4	7	11	15	18	twenty two	26	29	33	36	40	44	47	51	55
q 2	1	10	8	12	twenty one	19	twenty three	32	30	39	43	41	50	54	52
u	15	16	17	18	19	20	twenty one	twenty two	twenty three	twenty four	25	26	27	28	29
q 1	58	62	66	69	73	77	80	84	87	91	95	98	102	106	109
q 2	61	59	63	72	70	74	83	81	90	94	92	101	105	103	112

In a second possible implementation manner, for the first sequence and the second sequence of the X base sequences, the root index of the first ZC sequence of the first sequence is q, and the second ZC sequence of the second sequence is generated The root index of (q+V) mod N, then the absolute value of V

Is an integer in set A1 or set A2 or set A3, and the relationship between set A1 or set A2 or set A3 and N satisfies at least one row in Table 4 below. Optionally, the root index q _{1 of} the first ZC sequence and the root index q _{2 of} the second ZC sequence may be determined according to the following formula:

Among them, i=1, 2, v ₁ =0,

u is the group ID or cell ID of the first sequence group, and B is an integer greater than 1, for example, B=31.

Table 4

N	A1	A2	A3
71	27	20,27,24	8,4
83	28,34,20	18,10,12	2
107	39,44,50	37,34,36	29,19
113	6,5,14	3	3,32,5
139	6,4	4	3,2,4
167	45,28,26	7,8,21	2,4,
191	40,14,53	9,32,8	3,5,4
211	12,11,88	6	8,57,76
239	14,13,37	7,6	5,6,3
241	10,9,7	7,6	5,6,3
251	18,15,74	13,12,11	5,4,7
257	69,70,68	13,12,52	5,4,6
263	15,16,14	8,7	5,6,4
269	11,10,8	8,7	5,6,4
271	11,10,8	8,7	5,6,4
277	19,20,17	13,14,12	5,6,4
281	11,8	8,7	7,6,4
283	16,15,17	8	7,6,8
311	150,149	15,16,139	7,6,5
359	22,21,20	11,10,9	13,34,99
383	15,14	11,10	9,8,7
431	30,29,31	22,20,23	11,10,9
449	18,17,16	14,13,12	11,10,9
457	18,17,16	14,13,12	11,10,9
461	28,27,26	14,13,12	11,10,9
463	28,27,29	14,13,12	11,10,9
467	19,18,17	14,13,12	11,10,12
487	29,30,28	15,14,13	11,12,10
491	29,30,28	15,14,13	11,12,10
499	20,19,18	15,14,13	11,12,10
503	20,19,18	15,14,13	18,19,46
509	32,31,34	15,14,13	13,12,11
521	21,20,19	16,15,14	13,12,11
523	21,20,19	16,15,14	13,12,11
541	34,33,36	31,32,30	13,12,95
547	22,21,20	30,31,29	13,12,14
557	38,39,37	29,28,30	13,12,14
563	23,22,21	16,15	13,14,12
569	23,22,21	17,16,15	13,14,12
571	23,22,21	17,16,15	13,14,12
619	25,24,23	34,35,33	15,14,68

661	319,318,317	35,34,36	17,16,15
719	45,44,48	22,21,20	17,18,16
761	47,48,46	42,43,44	19,18,20
787	32,31,30	24,23,22	19,20,18
811	49,50,47	25,24,23	21,20,19
863	50,49,48	27,26,25	21,22,20
911	50,48,49	28,27,26	23,22,21
953	50,49,48	32,30,29	23,24,22
967	39,38,37	30,29,28	25,24,23
971	39,38,37	39,38,37	25,24,23
977	68,69,70	68,69,71	25,24,23
983	69,68,70	71,69,68	25,24,23
991	70,69,67	70,72,71	25,24,23
997	40,39,38	40,39,38	25,24,26
1009	61,64,62	57,56,58	25,26,24
1013	67,64,62	34,32,31	25,26,24
1019	41,40,39	34,32,31	25,26,24
1021	41,40,39	32,31,30	25,26,24
1031	40,41,39	32,31,30	25,26,24
1033	40,41,39	32,31,30	25,26,24
1039	502,501,500	55,53,54	25,26,24
1049	76,74,73	55,54,56	27,26,25
1051	76,74,75	55,54,56	27,26,25
1103	77,80,78	55,57,56	27,28,26
1151	45,46,44	36,35,34	29,28,30
1237	598,597,596	64,62,63	31,32,30
1291	52,51,50	40,39,38	33,32,31
1297	91,94,92	69,67,68	33,32,34
1301	91,92,94	69,67,68	33,32,34
1303	92,91,94	69,67,68	33,32,34
1307	52,51,50	41,40,39	33,32,31
1319	53,52,51	41,40,39	33,34,32
1321	53,52,51	41,40,39	33,34,32
1327	81,84,82	41,40,39	33,32,34
1439	58,57,56	45,44,43	35,36,37
1531	108,111,107	81,79,82	39,38,40
1583	62,63,61	49,48,47	40,39,38
1627	64,65,63	51,49,50	41,42,40

The beneficial effect of this implementation is that the cross-correlation of two truncated length sequences can be a joint optimization goal, and the V can be determined to better match the frequency selection characteristics of the channel. For example, the truncated lengths corresponding to the set S1 in Table 4 are 24 and 30, the truncated lengths corresponding to the set S2 are 30 and 36, and the truncated lengths corresponding to the set S3 are 36 and 72. Then the number of set S1 is used as the value of V, which can ensure that under the two truncation lengths of 30 and 36, the truncation cross-correlation of the base sequence in the same sequence group is very small, and the sequence between different sequence groups is not increased. Interrelated. Of course, the above is just an example, and the sets S1 to S3 may also correspond to other truncated lengths, which will not be repeated here.

In a third possible implementation, the absolute value of V

It is L1 or L2 or L3 or L4. The relationship between L1 or L2 or L3 or L4 and N satisfies at least one row in Table 5 below. In this implementation, given a length M of a reference signal sequence, a value of N can be determined, which is determined according to Table 5

Then the root indexes q ₁ and q _{2 of} the first ZC sequence and the second ZC sequence are determined by the following formula:

Among them, i=1, 2, v ₁ =0,

u is the group ID or cell ID of the first sequence group, and B is an integer greater than 1, for example, B=31.

Optionally, the values of L1, L2, L3, and L4 can be designed for different truncation lengths, for example, the truncation length corresponding to the range L1 is 24, the truncation length corresponding to the range L2 is 30, and the truncation length corresponding to the range L3 is Is 36, and the truncation length corresponding to the range L4 is 72. Of course, the above is only an example, and L1 to L4 can also correspond to other truncated lengths, which will not be repeated here. The beneficial effects are as described above and will not be repeated here.

table 5

N	L1	L2	L3	L4
71	27	27	20	A
83	34	20	2	A
107	51	37	30	A
113	54	3	3	56
139	6	4	4	2
167	80	twenty three	4	2
191	8	66	5	2
211	101	6	6	104
239	38	7	6	3
241	10	7	6	3
251	10	86	7	3
257	123	62	7	3
263	126	8	7	3
269	11	8	7	3
271	11	8	7	3
277	11	109	7	3
281	11	8	7	4
283	45	8	8	4
311	149	150	8	4
359	172	11	9	177
383	15	13	10	5
431	17	208	11	6
449	18	14	12	6
457	18	14	12	6
461	221	14	12	6
463	161	14	12	6
467	19	14	12	6
487	233	15	13	6
491	235	15	13	6
499	20	17	13	6
503	20	17	13	248
509	177	17	13	7
521	twenty one	16	14	7

523	twenty one	16	14	7
541	259	18	263	7
547	twenty two	17	266	7
557	twenty two	269	15	7
563	twenty three	16	15	7
569	twenty three	19	15	7
571	twenty three	19	15	7
619	25	19	301	8
661	316	319	18	9
719	344	twenty four	18	9
761	364	twenty four	370	10
787	32	26	twenty one	10
811	388	25	twenty two	11
863	413	27	twenty three	11
911	436	28	twenty three	12
953	456	32	twenty four	12
967	39	30	26	13
971	39	30	26	13
977	39	472	26	13
983	39	475	25	13
991	40	479	25	13
997	40	31	27	13
1009	483	31	491	13
1013	485	34	27	13
1019	41	34	26	13
1021	41	32	26	13
1031	41	32	26	13
1033	41	32	28	13
1039	497	502	28	13
1049	42	507	28	14
1051	42	508	28	14
1103	44	533	28	14
1151	46	36	31	15
1237	592	598	32	16
1291	52	40	35	17
1297	52	627	35	17
1301	52	629	35	17
1303	52	630	35	17
1307	52	41	33	17
1319	53	41	35	17
1321	53	41	36	17
1327	635	41	36	17
1439	58	45	39	18
1531	61	740	41	20

1583	63	49	40	twenty one
1627	65	51	44	twenty one

In a fourth possible implementation, the absolute value of V

The relationship with N satisfies at least one row in Table 6 below. In this implementation, given a length M of a reference signal sequence, a value of N may be determined, and the value is determined according to Table 6.

Then the root indexes q ₁ and q _{2 of} the first ZC sequence and the second ZC sequence are determined by the following formula:

Among them, i=1, 2, v ₁ =0,

u is the group ID or cell ID of the first sequence group, and B is an integer greater than 1, for example, B=31.

Table 6

N	V
71	20
83	2
107	twenty two
113	3
139	4
167	4
191	5
211	6
239	7
241	7
251	7
257	7
263	7
269	7
271	7
277	8
281	8
283	8
311	9
359	10
383	11
431	12
449	13
457	13
461	13
463	13
467	13
487	13
491	14
499	14
503	14
509	15
521	15
523	15
541	15
547	16
557	16
563	16

569	16
571	16
619	18
661	19
719	twenty one
761	twenty two
787	twenty two
811	twenty three
863	twenty four
911	26
953	27
967	28
971	28
977	28
983	28
991	28
997	28
1009	29
1013	29
1019	29
1021	29
1031	29
1033	29
1039	30
1049	30
1051	30
1103	32
1151	33
1237	35
1291	37
1297	37
1301	37
1303	37
1307	37
1319	38
1321	38
1327	38
1439	41
1531	44
1583	45
1627	47

According to the method provided by the embodiment of the present application, when a sequence group includes two base sequences, the absolute value of V is greater than 1, especially when the length N of the ZC sequence is large, the absolute value of V is greater. There is N, and the absolute value of V is greater than 2. In this scenario, when any of the first to fourth implementations is satisfied, the network device may allocate two base sequences of the same length to a different terminal device at the same time in a sequence group, so that The number of reference signal sequences that can be allocated by the device is doubled. The number of reference signal sequences is increased without increasing interference between reference signal sequences, which improves the accuracy of channel estimation based on reference signals. For example, in the fourth implementation, when N=139, if v ₁ =0 and v ₂ =1 are used to obtain the root indexes of two ZC sequences, the two base sequences obtained according to the two ZC sequences are truncated. The cross-correlation at length 30 is as high as 8.7dB, which is equivalent to the introduction of 8.7dB of interference; if Table 6 is used, let v ₁ =0 and v ₂ = 4 obtain the root index of two ZC sequences, then according to these two ZC The cross-correlation of the two base sequences obtained by the sequence at a truncation length of 30 is only 2.7dB, which greatly reduces the inter-sequence interference in the same sequence group and does not increase the inter-sequence interference of different sequence groups. In addition, the method provided in the embodiment of the present application provides corresponding absolute values of V for different values of N, which can ensure that the cross-correlation of the base sequence is very low under various values of M. For example, N=571 and N=113 are the same as V=3, which will cause the cross-correlation of the two base sequences to be as high as 9dB when the truncation length is 30; and using the recommended V=16, the cross-correlation can be only 2.8dB. It can be seen that the method provided by the embodiment of the present application can ensure that the cross-correlation of the base sequence is very low under various values of M.

In the second possible scenario, each sequence group includes at least 3 sequences. For the convenience of description, the following uses three sequences in each sequence group as an example for description. For other cases, reference may be made to the description here, and details are not described here.

In this scenario, for any three sequences in the first sequence group, the first sequence, the second sequence, and the third sequence, the root index of the first ZC sequence generating the first sequence is q ₁ =q, generating The root index of the second ZC sequence of the second sequence is q ₂ =(q+V)mod N, and the root index of the third ZC sequence that generates the third sequence is q ₃ =(q+W) mod N, V and W are integers.

Optionally, when the length of the first ZC sequence and the length of the second ZC sequence are both the first length, the value of V is V1, and the length of the first ZC sequence and the second When the length of the ZC sequence is all the second length, the value of V is V2; there is a difference between the first length and the second length, and the absolute value of V1 is different from the absolute value of V2, namely There is N1≠N2, so that the absolute value of V1≠the absolute value of V2, N1 is the first length, and N2 is the second length.

The beneficial effect of this is that, for different base sequence lengths M, the inter-sequence interference of base sequences of the same length located in the first sequence group can be very small. For base sequences of different lengths, for all base sequences of different lengths, if the absolute value of V will result in only a certain length M, the interference between the base sequences in the first sequence group is very small However, under other values of length M, the interference between the base sequences in the first sequence group is greater. When the network device allocates the first sequence group to the terminal devices in the cell, the problem that the sequence interference between the terminal devices that send reference signal sequences of the same length is relatively large may occur. Therefore, under different base sequence lengths M, the absolute value of V has different values, which can make sequence interference between multiple terminal devices transmitting any reference signal sequence of the same length in the same cell very small , While not increasing the interference between the reference signals of different cells.

When the base sequences in the same sequence group are allocated to the terminal devices in the same cell, the number of terminal devices in each cell that can simultaneously transmit reference signals of the same length becomes at least three times the original number. At the same time, the number of sequences can ensure that the interference power between the reference signal sequences generated by the existence of at least three base sequences of the same length in a sequence group is very low, so that the interference between the reference signal sequences is much lower than the signal, which is beneficial to Flexible network planning improves the channel measurement accuracy of network devices based on reference signal sequences.

When base sequences in the same sequence group are allocated to terminal devices in the same or different cells, there are at least 90 base sequences in the entire network for flexible scheduling. For example, for a cell with a small number of terminal devices, one base sequence can be allocated For a cell with a large number of terminal devices, multiple base sequences can be allocated. In this case, a possible implementation method is to allocate the base sequences in the same sequence group to different terminal devices in the same cell as much as possible. In a cell with a large number of terminal devices, the bases in multiple sequence groups can be The sequence is allocated to the terminal equipment in the cell.

Optionally, when the length of the first ZC sequence is N, the root index of the first ZC sequence is q, and the root index of the second ZC sequence is (q+V) mod N, and the presence of N makes V absolute The value is greater than 3.

The beneficial effect of this is that, among the base sequences of a larger length in the first sequence group, the interference between base sequences of the same length is small, which can cause the reference signal sequence of a longer length to be transmitted in the same cell The sequence interference between multiple terminal devices is very small.

Optionally, when the length of the first ZC sequence and the length of the second ZC sequence are both the first length, the value of V is V1, and the length of the first ZC sequence and the second When the length of the ZC sequence is all the second length, the value of V is V2; the existence of the first length is greater than the second length, so that the absolute value of V1 is greater than the absolute value of V2, that is, there is N1>N2, such that the absolute value of V1>the absolute value of V2, N1 is the first length, and N2 is the second length.

The beneficial effect of this is that for different base sequence lengths M, the inter-sequence interference of base sequences of the same length located in the first sequence group can be very small. For the base sequences of different lengths, for all base sequences of different lengths, if the absolute values of V all take the same value, it will result in only a few values of length M, the The interference between the base sequences is very small, and under other values of length M, the interference between the base sequences in the first sequence group is large. When the network device allocates the first sequence group to the terminal devices in the cell, the problem that the sequence interference between the terminal devices that send reference signal sequences of the same length is relatively large may occur. Therefore, under different base sequence lengths M, the absolute value of V has different values, which can make sequence interference between multiple terminal devices transmitting any reference signal sequence of the same length in the same cell very small Without increasing intersequence interference between different sequence groups.

Optionally, when the group identifier of the first sequence group is u1, the value of V is V1, and when the group identifier of the first sequence group is u2, the value of V is V2, and u1 exists Unlike u2, V1 is different from V2, that is, the value of V is related to the group identifier of the first sequence group.

The beneficial effect of this is that even for a large value of L, the root index of the ZC sequence that generates the base sequence of all sequence groups is not repeated, and at the same time, for each base sequence length M, each sequence in the L sequence groups The number of base sequences of length M included is as much as possible, which helps to support more terminal devices in the same cell to send reference signal sequences on the same time-frequency resources and ensure that the inter-sequence interference is small. For example, in the above formula for determining q

In the formula, if Δ is determined according to V by the formula Δ=V×(-1) ^f(u,N) or Δ=-V×(-1) ^f(u,N) , then the value of Δ and the group identification u related. Under some group identifications, Δ=V, and under other group identifications, Δ=-V. As another example, for the length N of a ZC sequence, there may be K V values V ₁ , V ₂ ,..., V _K , such that the generated based on the root index q ₁ and (q ₁ +V _k ) mod N The intersequence interference of the 2 base sequences of the first sequence group is sufficiently low, where K is an integer greater than 1,

i, j and k are integers greater than or equal to 1 and less than or equal to K, and i and j are not the same,

Represents the absolute value of Y. At this time, there may be a case where when only any one of V _i is adopted, the L group base sequence cannot be found, satisfying that each sequence group includes 2 base sequences, and the root of the Z group sequence of the L group base sequence is generated The indicators are not repeated, especially when L is large, for example, L=30. This will cause terminal devices in different cells to generate reference signal sequences of the same length based on the same base sequence, resulting in large inter-cell interference between reference signal sequences. At this time, in some sequence groups, a certain V _{i is} used to design the sequence of the group, and in other sequence groups, another V _{j is} used to design the sequence of the group, which can cause the generation of the L group sequence. The root index of the ZC sequence is not repeated, to avoid the interference of the reference signal sequence caused by the terminal equipment in the neighboring cell.

Optionally, when the group identifier of the first sequence group is u1, the value of V is V1, and when the group identifier of the first sequence group is u2, the value of V is V2. For any U1 is different from u2, V1 is the same as V2, that is, the value of V is independent of the group identifier of the first sequence group.

Optionally, when the cell identifier of the first sequence group is c1, the value of V is V1, and when the cell identifier of the first sequence group is c2, the value of V is V2, and c1 exists Unlike c2, V1 is different from V2, that is, the value of V is related to the cell identifier of the first sequence group.

In this scenario, V, W, and N can have multiple association relationships, described in detail below.

Optionally, in this scenario, the W is determined according to the V, or the V is determined according to the W. Optionally, the V and the W satisfy any one of the following formulas:

W=-V; or, V is even, W=V/2; or, W=2V; or, V is odd, W=(N+V)/2; or, V is odd, W=(NV) /2; or, V is an odd number, W=-(NV)/2.

Optionally, the V and the W may be independently designed values, and there is no explicit direct relationship between them.

In a first possible implementation, the absolute value of V

(which is

or

) Is any integer in set S1 or set S2 or set S3 or set S4, and the relationship between set S1 or set S2 or set S3 or set S4 and N satisfies at least one row in Table 7 below. Optionally, in this implementation, the root index of the first ZC sequence of q _1, q root index of the ZC sequence of the second _2, the third root index q of the ZC sequence according to the formula ₃ (4 -1) or (4-2) determine:

Among them, i=1, 2, 3, v ₁ =0,

u is the group ID or cell ID of the first sequence group, and B is an integer greater than 1, for example, B=31. At this time, the relationship between W and V is:

It should be noted that since (q+W)modN is equal to (q+W+N)modN, therefore, when V<0, the above W can also be written as W=N-(NV)/2=(N+V )/2, that is, the relationship between W and V is written as:

W = (N+V)/2 (4-4).

Therefore, at this time, the relationship between W and V can be either (4-3) or (4-4), and the root indexes of the first ZC sequence and the second ZC sequence obtained by using the two are the same.

Alternatively, in this implementation, the root index of the first ZC sequence of q _1, q root index of the ZC sequence of the second _2, the third root index q of the ZC sequence ₃ according to the formula (4-5 ) Or (4-6) to determine:

among them,

Optional, order

v ₃ =0, then q ₁ , q ₂ , q ₃ can be obtained. u is the group ID or cell ID of the first sequence group, and B is an integer greater than 1, for example, B=31. At this time, the relationship between W and V is W=(NV)/2. Optionally, let v ₁ =0,

At this time, the q ₂ = (q ₁ +V') modN, q ₃ = (q ₁ +W') modN,

W'=N-V'. Then the values of V'and W'still meet the characteristics of V and W mentioned in step 102, that is, the absolute value of V'and the absolute value of W'are integers greater than or equal to K3 and less than or equal to N-K3, K3> 1. At this time, from the relationship between the absolute value of V and N in Table 7, the relationship between V′ and N can be obtained. Therefore, no matter which order of value of v _i is used to determine q ₁ , q ₂ , and q ₃ , the three sets of root indexes obtained are consistent, and the cross-correlation performance of the three base sequences of the same sequence group is also Consistent.

Table 7

N	S1	S2	S3	S4
97	71,73,95,49	71,95,1,73	95,71,1,73	1,49,95,73
113	35,79,107,89	35,107,89,39	107,17,39,35	1,57,63,13
139	127,129,7,73	91,131,43,129	3,131,71,21	135,57,15,137
167	7,153,87,155	31,155,109,87	159,3,73,121	163,57,95,131
191	9,175,177,91	125,5,23,145	5,181,33,75	57,77,187,97
211	9,193,137,101	199,5,39,83	5,199,139,201	3,107,159,205
107	99,39,23,91	99,47,23,91	47,37,91,23	1,53,29,105
239	9,163,11,219	9,157,141,105	5,227,157,181	3,121,233,59
283	11,193,13,259	7,147,185,11	7,267,145,269	3,275,143,97
311	13,11,285,15	11,9,161,7	9,7,159,295	303,277,3,101
359	15,13,245,329	13,235,9,141	9,175,339,285	5,177,349,241
383	15,17,351,261	11,357,251,9	11,9,197,187	5,189,257,329
431	19,17,15,395	15,223,11,327	11,407,9,221	5,419,289,213
449	19,17,21,411	13,419,17,233	13,11,219,231	5,437,227,335
479	21,19,17,327	17,447,13,11	13,11,245,233	7,243,5,81
523	21,23,19,357	15,19,271,343	15,13,255,415	7,265,509,351
571	25,23,21,523	17,21,15,275	15,17,13,539	7,289,555,383
619	27,25,23,29	21,19,17,23	17,15,19,317	7,9,305,497
661	29,27,25,451	23,19,433,25	17,19,15,435	9,335,7,163
719	31,29,27,33	25,21,27,471	19,17,21,351	9,355,699,59
761	33,31,29,27	23,27,21,499	21,19,23,371	9,11,511,385
787	33,31,35,29	27,23,407,29	21,19,23,743	11,9,399,765
811	35,33,31,29	25,23,29,531	23,21,19,395	11,9,411,537
863	37,35,33,31	29,25,31,447	23,25,21,421	11,839,437,9
911	39,37,35,33	31,27,33,471	25,23,27,21	11,13,461,449
953	41,39,37,35	29,33,27,493	25,27,23,29	13,11,483,631
997	43,41,39,37	31,35,29,37	27,25,29,23	13,11,505,669
1051	45,43,41,47	35,37,31,29	29,27,25,31	13,15,519,533
1103	47,45,43,49	37,33,39,31	29,31,27,33	15,13,559,545
1151	49,47,45,51	39,35,41,33	31,29,33,27	15,13,1119,583
1237	53,51,49,47	41,43,37,35	33,31,35,29	17,15,627,611
1291	55,53,51,57	43,39,45,37	35,33,37,31	17,15,867,19

1327	57,53,55,51	45,41,47,39	35,37,33,39	17,19,15,891
1439	61,63,59,57	49,45,43,51	39,41,37,35	19,17,21,729
1531	65,67,61,63	51,47,53,45	41,39,43,37	21,19,17,755
1583	69,67,63,65	53,49,55,47	43,45,41,39	21,19,801,23
1627	71,69,65,67	55,51,49,57	45,43,41,47	21,23,19,825

The beneficial effect of this implementation is that the cross-correlation of different truncation length sequences can be used as the optimization goal, and the V and W can be determined to more closely match the coherent bandwidth of the channel, ensuring that under typical channel coherent bandwidth, Increase the inter-sequence interference between different sequence groups, while ensuring that the inter-sequence interference within a sequence group is very low. The sets S1 to S4 in Table 7 may correspond to different truncation lengths, for example, the truncation length corresponding to set S1 is 24, the truncation length corresponding to set S2 is 30, the truncation length corresponding to set S3 is 36, and the truncation length corresponding to set S4 is Is 72. Of course, the above is only an example, and the sets S1 to S4 may also correspond to other truncated lengths, which will not be repeated here.

In a second possible implementation, the absolute value of V

It is L1 or L2 or L3 or L4, and the relationship between L1 or L2 or L3 or L4 and N satisfies at least one row in Table 8 below. At this time, optionally, in this implementation, the root index q ₁ of the first ZC sequence, the root index q ₂ of the second ZC sequence, and the root index q _{3 of} the third ZC sequence are based on the following Formula (5-1) or (5-2) determines:

among them,

Optionally, let v ₁ =0,

u is the group ID or cell ID of the first sequence group, and B is an integer greater than 1, for example, B=31. At this time, similar to the analysis in the first possible implementation, the relationship between W and V is

Or equivalently, the relationship between W and V is written as:

W=(N+V)/2.

The root indexes of the first ZC sequence and the second ZC sequence obtained using both are the same.

Alternatively, in this implementation, the root index of the first ZC sequence of q _1, q root index of the ZC sequence of the second _2, the third root index q of the ZC sequence ₃ according to the formula (5-3 ) Or (5-4) determine:

among them,

Optional, order

v ₃ =0, then q ₁ , q ₂ , q ₃ can be obtained. u is the group ID or cell ID of the first sequence group, and B is an integer greater than 1, for example, B=31. At this time, the relationship between W and V is W=(NV)/2. Optionally, let v ₁ =0,

At this time, the q ₂ = (q ₁ +V') modN, q ₃ = (q ₁ +W') modN,

W'=N-V'. At this time, from the relationship between the absolute value of V and N in Table 7, the relationship between V′ and N can be obtained. Therefore, no matter which order of value of v _i is used to determine q ₁ , q ₂ , and q ₃ , the three sets of root indexes obtained are consistent, and the cross-correlation performance of the three base sequences of the same sequence group is also Consistent.

Table 8

N	L1	L2	L3	L4
97	71	71	95	1
113	35	35	107	1
139	127	91	3	135
167	7	31	159	163
191	9	125	5	57
211	9	199	5	3
107	99	99	47	1
239	9	9	5	3
283	11	7	7	3
311	13	11	9	303
359	15	13	9	5
383	15	11	11	5
431	19	15	11	5
449	19	13	13	5
479	twenty one	17	13	7
523	twenty one	15	15	7
571	25	17	15	7
619	27	twenty one	17	7
661	29	twenty three	17	9
719	31	25	19	9
761	33	twenty three	twenty one	9
787	33	27	twenty one	11
811	35	25	twenty three	11
863	37	29	twenty three	11
911	39	31	25	11
953	41	29	25	13
997	43	31	27	13
1051	45	35	29	13
1103	47	37	29	15
1151	49	39	31	15
1237	53	41	33	17
1291	55	43	35	17
1327	57	45	35	17
1439	61	49	39	19
1531	65	51	41	twenty one
1583	69	49	43	twenty one
1627	71	55	45	twenty one

The beneficial effect of this implementation is that the cross-correlation of different truncation length sequences can be used as the optimization goal, and the V and W can be determined to better match the coherent bandwidth of the channel and ensure that under a certain truncation length, the same The cross-correlation between the base sequences of the sequence group is very low, that is, the interference between the sequences is very low, and at the same time, the interference between the base sequences of different sequence groups is not increased. L1 to L4 in Table 8 may correspond to different truncation lengths. For example, L1 corresponds to a truncation length of 24, L2 corresponds to a truncation length of 30, L3 corresponds to a truncation length of 36, and L4 corresponds to a truncation length of 72. Of course, the above is only an example, and L1 to L4 can also correspond to other truncated lengths, which will not be repeated here.

In a third possible implementation manner, the absolute value of V is set S1 or set S2 or set S3 or set S4, and the relationship between set S1 or set S2 or set S3 or set S4 and N satisfies the following Table 9 At least one line. At this time, optionally, in one of the following four formulas, at least one formula may be used to determine the root index q ₁ of the first ZC sequence and the root index q _{2 of} the second ZC sequence. The root index q _{3 of} the third ZC sequence:

among them,

Optionally, let v ₁ =0,

u is the group ID or cell ID of the first sequence group, and B is an integer greater than 1, for example, B=31. At this time, similar to the analysis in the first possible implementation, the relationship between W and V is:

Or equivalently, the relationship between W and V is written as:

W=(N+V)/2

The root indexes of the first ZC sequence and the second ZC sequence obtained using both are the same.

Table 9

N	S1	S2	,S3	S4
97	71,73,95,49	71,95,1,73	95,71,1,73	1,49,95,73
113	35,79,107,89	35,107,89,39	107,17,39,35	1,57,63,13
139	127,129,7,73	91,131,43,129	3,131,71,21	135,57,15,137
167	7,153,87,155	31,155,109,87	159,3,73,121	163,57,95,131
191	9,175,177,91	125,5,23,145	5,181,33,75	57,77,187,97
211	9,193,137,101	199,5,39,83	5,199,139,201	3,107,159,205
107	99,39,23,91	99,47,23,91	47,37,91,23	1,53,29,105
239	9,163,11,219	9,157,141,105	5,227,157,181	3,121,233,59
283	11,193,13,259	7,147,185,11	7,267,145,269	3,275,143,97
311	13,11,285,15	11,9,161,7	9,7,159,295	303,277,3,101
359	15,13,245,329	13,235,9,141	9,175,339,285	5,177,349,241
383	15,17,351,261	11,357,251,9	11,9,197,187	5,189,257,329
431	19,17,15,395	15,223,11,327	11,407,9,221	5,419,289,213
449	19,17,21,411	13,419,17,233	13,11,219,231	5,437,227,335
479	21,19,17,327	17,447,13,11	13,11,245,233	7,243,5,81
523	21,23,19,357	15,19,271,343	15,13,255,415	7,265,509,351
571	25,23,21,523	17,21,15,275	15,17,13,539	7,289,555,383
619	27,25,23,29	21,19,17,23	17,15,19,317	7,9,305,497
661	29,27,25,451	23,19,433,25	17,19,15,435	9,335,7,163
719	31,29,27,33	25,21,27,471	19,17,21,351	9,355,699,59
761	33,31,29,27	23,27,21,499	21,19,23,371	9,11,511,385
787	33,31,35,29	27,23,407,29	21,19,23,743	11,9,399,765
811	35,33,31,29	25,23,29,531	23,21,19,395	11,9,411,537
863	37,35,33,31	29,25,31,447	23,25,21,421	11,839,437,9
911	39,37,35,33	31,27,33,471	25,23,27,21	11,13,461,449
953	41,39,37,35	29,33,27,493	25,27,23,29	13,11,483,631

997	43,41,39,37	31,35,29,37	27,25,29,23	13,11,505,669
1051	45,43,41,47	35,37,31,29	29,27,25,31	13,15,519,533
1103	47,45,43,49	37,33,39,31	29,31,27,33	15,13,559,545
1151	49,47,45,51	39,35,41,33	31,29,33,27	15,13,1119,583
1237	53,51,49,47	41,43,37,35	33,31,35,29	17,15,627,611
1291	55,53,51,57	43,39,45,37	35,33,37,31	17,15,867,19
1327	57,53,55,51	45,41,47,39	35,37,33,39	17,19,15,891
1439	61,63,59,57	49,45,43,51	39,41,37,35	19,17,21,729
1531	65,67,61,63	51,47,53,45	41,39,43,37	21,19,17,755
1583	69,67,63,65	53,49,55,47	43,45,41,39	21,19,801,23
1627	71,69,65,67	55,51,49,57	45,43,41,47	21,23,19,825

The beneficial effect of this implementation is that the cross-correlation of sequences with different truncation lengths can be optimized to ensure that under the truncation length, the cross-correlation between the base sequences of the same sequence group is very low, that is, the inter-sequence interference is very low. At the same time, the interference between the base sequences of different sequence groups is not increased. The sets S1 to S4 in Table 9 may correspond to different truncation lengths, for example, the cutoff length corresponding to set S1 is 24, the cutoff length corresponding to set S2 is 30, the cutoff length corresponding to set S3 is 36, and the cutoff length corresponding to set S4 is Is 72. Of course, the above is only an example, and the sets S1 to S4 may also correspond to other truncated lengths, which will not be repeated here.

In a fourth possible implementation manner, the absolute value of V is set S1 or S2 or S3, and the relationship between set S1 or S2 or S3 and N satisfies at least one row in Table 10 below. At this time, optionally, in this implementation manner, the root index q ₁ of the first ZC sequence, the root index q ₂ of the second ZC sequence, and the root index q _{3 of} the third ZC sequence may be based on Determined by the following formula:

among them,

Optionally, let v ₁ =0,

u is the group ID or cell ID of the first sequence group, and B is an integer greater than 1, for example, B=31. At this time, similar to the analysis in the first possible implementation, the relationship between W and V is:

Or equivalently, the relationship between W and V is written as:

W=(N+V)/2

The root indexes of the first ZC sequence and the second ZC sequence obtained using both are the same.

Table 10

N	S1	S2	S3
97	71	71	71
113	61,79,57	39,23,17	17,79,39
139	97,125,127	19,37,39	127,89,125
167	155	155,139,137	139,155,149
191	17,21,53	11,47,39	9,5
211	9,5	5	9,5
107	99	61,77,37	37,99,61
239	21,27,41	17,45,41	11,5
283	13,7	7	13,7
311	13,9	9	13,9

359	37,33,39	25,27,21	15,9
383	15,11	11	15,11
431	19,17,11	11	19,17,11
449	19,17,13	13	19,17,13
479	51,49,53	37,35,33	21,19,13
523	21,19,15	15	21,19,15
571	25,23,21	15,13,11	25,23,21
619	27,25,23	19,17	27,25,23
661	29,27,25	19,17	29,27,25
719	31,29,27	21,19	31,29,27
761	33,31,29	23,21	33,31,29
787	33,31,29	23,21	33,31,29
811	35,33,31	25,23	35,33,31
863	37,35,33	25,23	37,35,33
911	39,37,35	27,25	39,37,35
953	41,37,39	29,27,25	41,39,37
997	43,41,39	31,29,27	43,41,39
1051	45,43,41	37,31,29	45,43,41
1103	47,43,45	33,31,29	47,45,43
1151	49,45,47	35,33,31	49,47,45
1237	53,51,49	43,37,35	53,51,49
1291	55,51,53	39,37,35	55,53,51
1327	57,55,53	45,41,39	57,55,53
1439	61,59,57	49,45,43	61,59,57
1531	65,61,63	47,45,43	65,63,61
1583	69,67,65	49,47,45	69,67,65
1627	71,69,67	55,51,49	71,69,67

The beneficial effect of this implementation is that the cross-correlation of at least two truncated length sequences can be optimized, and the V and W can be determined to ensure that the base sequence of the same sequence group under the two truncated lengths The cross-correlation between them is very low, that is, the interference between sequences is very low, and at the same time, the interference between the base sequences of different sequence groups is not increased. For example, using the

To determine V, the cross-correlation of sequences with two truncation lengths of 24 and 30 can be made relatively low. Adopt the set S2

The cross-correlation of sequences with two truncation lengths of 36 and 30 can be made relatively low. Adopt the set S3

The cross-correlation of sequences with two truncation lengths 36 and 72 can be made relatively low. Of course, the above is just an example, and the sets S1 to S3 may also correspond to other truncated lengths, which will not be repeated here.

In a fifth possible implementation manner, the absolute value of V is X1 or X2 or X3 or X4, and the relationship between X1 or X2 or X3 or X4 and N satisfies at least one row in Table 11 below. At this time, optionally, in this implementation manner, the root index q ₁ of the first ZC sequence, the root index q ₂ of the second ZC sequence, and the root index q _{3 of} the third ZC sequence may be based on Determined by the following formula:

among them,

Optionally, let v ₁ =0,

u is the group ID or cell ID of the first sequence group, and B is an integer greater than 1, for example, B=31. At this time, similar to the analysis in the first possible implementation, the relationship between W and V is:

Or equivalently, the relationship between W and V is written as:

W=(N+V)/2

The root indexes of the first ZC sequence and the second ZC sequence obtained using both are the same.

Table 11

N	X1	X2	X3	X4
97	71	71	71	A
113	79	39	17	A
139	127	91	3	57
167	155	155	121	163
191	9	125	5	77
211	9	5	5	3
107	99	99	37	A
239	11	141	5	233
283	13	7	7	3
311	13	9	9	303
359	15	235	9	5
383	15	11	11	5
431	19	11	11	419
449	19	13	13	437
479	twenty one	447	13	7
523	twenty one	15	15	7
571	25	17	15	7
619	27	19	17	9
661	29	19	17	9
719	31	twenty one	19	9
761	33	twenty three	twenty one	9
787	33	twenty three	twenty one	11
811	35	25	twenty three	11
863	37	25	twenty three	11
911	39	27	25	11
953	41	29	25	13
997	43	31	27	13
1051	45	37	29	13
1103	47	33	29	15
1151	49	35	31	15
1237	53	43	33	17
1291	55	39	35	17
1327	57	45	35	17
1439	61	49	39	19
1531	65	47	41	twenty one
1583	69	49	43	twenty one
1627	71	55	45	twenty one

The beneficial effect of this implementation is that the cross-correlation of sequences with different truncation lengths can be optimized to ensure that under the truncation length, the cross-correlation between the base sequences of the same sequence group is very low, that is, the inter-sequence interference is very low. At the same time, the interference between the base sequences of different sequence groups is not increased. X1 to X4 in Table 11 may correspond to different truncation lengths. For example, X1 corresponds to a truncation length of 24, X2 corresponds to a truncation length of 30, X3 corresponds to a truncation length of 36, and X4 corresponds to a truncation length of 72. Of course, the above is just an example, and X1 to X4 can also correspond to other truncated lengths, which will not be repeated here. For example, N=571, if the existing technology is directly extended, let v ₁ =0, v ₂ =1, v ₃ =1, then the cross-correlation value of the three base sequences of a sequence group when the truncation length is 30 can reach 14.2dB, which is equivalent to the introduction of 14.2dB intersequence interference, is unacceptable. But if Table 11 is used, let

W=(N+V)/2=294, then the cross-correlation value of the three base sequences of a sequence group at a truncation length of 30 is a maximum of 2.7dB, which is 11.5dB lower than the former, and the inter-sequence interference introduced is greatly reduced.

In a sixth possible implementation manner, the absolute value of V is X1 or X2 or X3, and the relationship between X1 or X2 or X3 and N satisfies at least one row in Table 12 below. At this time, optionally, in this implementation manner, the root index q ₁ of the first ZC sequence, the root index q ₂ of the second ZC sequence, and the root index q _{3 of} the third ZC sequence may be based on Determined by the following formula:

Among them, i=1, 2, 3, v ₁ =0,

u is the group ID or cell ID of the first sequence group, and B is an integer greater than 1, for example, B=31. At this time, the relationship between W and V is:

Or equivalently, the relationship between W and V is written as: W=(N+V)/2.

Table 12

N	X1	X2	X3
97	71	71	71
113	61	39	17
139	97	19	127
167	155	155	139
191	17	11	9
211	9	5	9
107	99	61	37
239	twenty one	17	11
283	13	7	13
311	13	9	13
359	37	25	15
383	15	11	15
431	19	11	19
449	19	13	19
479	51	37	twenty one
523	twenty one	15	twenty one
571	25	15	25
619	27	19	27
661	29	19	29
719	31	twenty one	31
761	33	twenty three	33
787	33	twenty three	33

811	35	25	35
863	37	25	37
911	39	27	39
953	41	29	41
997	43	31	43
1051	45	37	45
1103	47	33	47
1151	49	35	49
1237	53	43	53
1291	55	39	55
1327	57	45	57
1439	61	49	61
1531	65	47	65
1583	69	49	69
1627	71	55	71

The beneficial effect of this implementation is that the cross-correlation of at least two truncated length sequences can be optimized, and the V and W can be determined to better match the frequency selection characteristics of the channel. For example, use X1 to determine

The cross-correlation of sequences with two truncation lengths of 24 and 30 can be made relatively low. Use the X2

The cross-correlation of sequences with two truncation lengths of 36 and 30 can be made relatively low. Use the X3

The cross-correlation of sequences with two truncation lengths 36 and 72 can be made relatively low. Of course, the above is just an example, and X1 to X3 can also correspond to other truncated lengths, which will not be repeated here. For example, N=571, if the existing technology is directly extended, let v ₁ =0, v ₂ =1, v ₃ =1, then the maximum cross-correlation value of the three base sequences of a sequence group when the truncation length is 30 is 14.2dB, which is equivalent to the introduction of 14.2dB intersequence interference. The maximum cross-correlation value at the truncation length 36 is 14.3dB, which is equivalent to the introduction of 14.3dB intersequence interference, which is unacceptable. However, if the

W=(N+V)/2=293, then the maximum cross-correlation value of the three base sequences of a sequence group at the truncation length 30 is 3.2dB, and the cross-correlation value at the truncation length 36 can reach 2.7dB, respectively Compared with the former, it is reduced by 11dB and 11.5dB, and the introduced inter-sequence interference is greatly reduced.

In a seventh possible implementation manner, the relationship between the absolute value of V and N satisfies at least one row in the following Table 13-1 or at least one row in the following Table 13-2. At this time, optionally, in this implementation manner, the root index q ₁ of the first ZC sequence, the root index q ₂ of the second ZC sequence, and the root index q _{3 of} the third ZC sequence may be based on Determined by the following formula:

Among them, i=1, 2, 3, v ₁ =0,

u is the group ID or cell ID of the first sequence group, and B is an integer greater than 1, for example, B=31. At this time, the relationship between W and V is:

Or equivalently, the relationship between W and V is written as: W=(N+V)/2.

Table 13-1

N	V
97	71

113	39
139	39
167	155
191	5
211	5
107	twenty three
239	5
283	7
311	9
359	9
383	11
431	11
449	13
479	13
523	15
571	15
619	17
661	19
719	twenty one
761	twenty three
787	twenty three
811	twenty three
863	25
911	27
953	27
997	29
1051	29
1103	33
1151	33
1237	35
1291	37
1327	39
1439	45
1531	43
1583	45
1627	51

Table 13-2

N	V
97	71
113	61
139	97
167	155
191	17
211	9
107	99
239	twenty one
283	13
311	13

359	37
383	15
431	19
449	19
479	51
523	twenty one
571	25
619	27
661	29
719	31
761	33
787	33
811	35
863	37
911	39
953	41
997	43
1051	45
1103	47
1151	49
1237	53
1291	55
1327	57
1439	61
1531	65
1583	69
1627	71

The beneficial effect of this implementation is that the cross-correlation of the two truncated length sequences of 30 and 36 can be optimized, and the V and W can be determined to better match the frequency selection characteristics of the channel. In actual systems, 30 and 36 are two commonly used truncation lengths, matching the channel-related bandwidth in most scenarios. Other beneficial effects are as described above and will not be repeated here.

In an eighth possible implementation manner, the absolute value of V is any integer in set S1 or set S2 or set S3 or set S4, and the relationship between set S1 or set S2 or set S3 or set S4 and N Meet at least one row in Table 14 below. Optionally, in this implementation, the root index of the first ZC sequence of q _1, q root index of the ZC sequence of the second _2, the third root index q of the ZC sequence ₃ according to the formula (a1 ) To (a4) any one of:

among them,

Optionally, let v ₁ =0,

u is the group ID or cell ID of the first sequence group, and B is an integer greater than 1, for example, B=31. At this time, W=-V.

Table 14

N	S1	S2	S3	S4
113	17,12,6	12,6,23,17	6,23,12	28,12,23,6
139	6,33,12,24	24,12,15	3,24,12,6	15,28,33
167	7,29,4,20	29,20,31,18	4,23,9,31	2,36,18,15
191	8,33,20,26	33,23,20,14	5,33,11,42	47,35,14,
211	9,50,25,5	39,22,4	36,5,18,43	52,26,45,9
107	8,23,15	8,15,23	8,15	15,23,8,
239	10,57,21,6	41,49,9,25	6,41,29,33	59,3,51,11
283	12,49,67,7	49,21,42,69	8,69,7,39	4,70,16,61
311	13,74,54,59	23,76,54,27	76,53,32,46	4,17,9,77
359	15,63,86,68	62,31,86,78	10,37	5,59,26,67
383	16,67,92,91	66,92,46,57	66	63,27,21,15
431	18,103,75	52,74,16,32	12,105,74	6,71,92,65
449	19,107,108,71	108,77,54,78	77,93	6,111,13,74
479	76,20,84,114	115,83,117,58	117,82,99,58	118,81,59,79
523	83,22,125,126	126,90,63	57,0,89	129,7,86,120
571	24,91,100,136	69,98,137,99	16,59,139,98	141,94,58,47
619	26,98,108	107,149,23	151,64,106,101	61,153,102,51
661	105	114,159,49	113,161,20,40	163,48,67,109
719	114	124,173	175,123,117,74	10,118,91,73
761	121,133	131,183,92	185,186,130,23	125,188,75,94
787	125,33,188,191	136,95	191,192,135,81	194,57,133,43
811	129	140,195,98	198,197,139	200,137,110,100
863	137	208,149	89,210,211	12,213,85,142
911	145,217	157,110	221,94,222,156	225,66,150,154
953	152	230,164,115	232,163,233	235,161,69,157
997	158,159	172,240	242,243,103	246,164,123
1051	167	181,253	255,256,180	259,173,133,260
1103	175,176	266,190	269,114	272,80,112,181
1151	183	198,199,277	281,279,119	16,284,189,63
1237	A	298,213	300,302	305,209,203,122
1327	205	223,311,222	A	212,319,218,318
1439	A	320,229	322,324,137	218,327,224,328
1531	A	347,248	349	355,237,243,182
1627	A	369,264	374,158	378,111,252,377

The sets S1 to S4 in Table 14 may correspond to different truncation lengths, for example, the cutoff length corresponding to set S1 is 24, the cutoff length corresponding to set S2 is 30, the cutoff length corresponding to set S3 is 36, and the cutoff length corresponding to set S4 is Is 72. The beneficial effects are as described above and will not be repeated here.

In a ninth possible implementation manner, the absolute value of V is any integer in set S1 or set S2 or set S3, and the relationship between set S1 or set S2 or set S3 and N satisfies at least the following Table 15 One line. Optionally, in this implementation, the root index of the first ZC sequence of q _1, q root index of the ZC sequence of the second _2, the third root index q of the ZC sequence according to the formula ₃ (b )determine:

among them,

Optionally, let v ₁ =0,

u is the group ID or cell ID of the first sequence group, and B is an integer greater than 1, for example, B=31. At this time, W=-V.

Table 15

N	S1	S2	S3
113	17,12	12,6	6,17,23
139	10,24,21	6,15,21	3
167	29,12,28	7,12,29	2,4
191	14,20,11	32,8,26	39,17,32
211	15,16,22	39,38,36	38,52,43
107	8	8	8,15
239	17,40,18	11,10,40	56,32,52
283	20,21,38	15,13,12	7,6,8
311	22,23,19	29,28,54	7,24,66
359	26,25,27	18,19,16	9,8,7
383	27,28,26	66	66,65,64
431	31,30,32	22,23,24	11,10,9
449	32,33,31	88,89,85	11,10,31
479	91,90,89	117,115	118,117,
523	98,99,97	66,65,107	60,81,58
571	42,41,40	30,31,29	22,23,21
619	44,45,46	122,123,121	68,67,121
661	114,113,112	114,113	121,120,119
719	124,123,122	141,142,143	18,19,17
761	131,130,129	149,150,151	134,133,132
787	136,135,134	156,155,157	194,193,192
811	140,139,138	161,160,162	200,199,198
863	163,165,164	110,109,108	22,23,21
911	157,156,155	179,180,181	225,224,223
953	183,181,182	232,230	235,234,233
997	172,171,170	198,196,197	246,245,244
1051	181,180,179	208,207,209	259,258,257
1103	208,211,209	269,268,266	272,271,270
1151	198,197,196	228,226,227	30,29,31
1237	298,297,296	300,298	305,304,303
1327	222,223,221	223	223,222,221
1439	320,319,318	322,321,320	235,236,237
1531	347,344,343	349,348,347	355,354,353
1627	369,366,365	374,373,372	378,377,376

The beneficial effect of this implementation is that the cross-correlation of at least two truncated length sequences can be optimized, and the V and W can be determined to better match the frequency selection characteristics of the channel. For example, using the

To determine V, the cross-correlation of sequences with two truncation lengths of 24 and 30 can be made relatively low. Use the S2

The cross-correlation of sequences with two truncation lengths of 36 and 30 can be made relatively low. Use the S3

The cross-correlation of sequences with two truncation lengths 36 and 72 can be made relatively low. Of course, the above is just an example, and S1 to S3 may also correspond to other truncated lengths, which will not be repeated here. For example, N=571, if the existing technology is directly extended, let v ₁ =0, v ₂ =1, v ₃ =1, then the maximum cross-correlation value of the three base sequences of a sequence group when the truncation length is 30 is 14.2dB, which is equivalent to the introduction of 14.2dB intersequence interference. The maximum cross-correlation value at the truncation length 36 is 14.3dB, which is equivalent to the introduction of 14.3dB intersequence interference, which is unacceptable. But if the table 15 is used

W = -V = -30, the cross-correlation value of the three base sequences of a sequence group at the truncation length 30 is 5.2dB at the maximum, and the cross-correlation value at the truncation length 36 can reach 4.8dB, which is lower than the former 9dB and 9.5dB, the inter-sequence interference introduced is greatly reduced.

In a tenth possible implementation manner, the absolute value of V is any integer of L1 or L2 or L3 or L4, and the relationship between L1 or L2 or L3 or L4 and N satisfies at least one row in Table 16 below. Optionally, in this implementation, the root index of the first ZC sequence of q _1, q root index of the ZC sequence of the second _2, the third root index q of the ZC sequence according to the formula ₃ (b )determine:

among them,

Optionally, let v ₁ =0,

u is the group ID or cell ID of the first sequence group, and B is an integer greater than 1, for example, B=31. At this time, W=-V.

Table 16

N	L1	L2	L3	L4
113	17	12	6	28
139	6	twenty four	3	A
167	7	29	4	2
191	8	33	5	47
211	9	39	36	52
107	8	8	8	15
239	10	41	6	59
283	12	49	8	4
311	13	twenty three	76	4
359	15	62	10	5
383	16	66	66	63
431	18	52	12	6
449	19	108	77	6
479	76	115	117	118
523	83	126	54	129
571	twenty four	69	16	141
619	26	107	151	61
661	105	114	113	163
719	114	124	175	10
761	121	131	185	125
787	125	136	191	194
811	129	140	198	200
863	137	208	89	12
911	145	157	221	225
953	152	230	232	235
997	158	172	242	246
1051	167	181	255	259
1103	175	266	269	272
1151	183	198	281	16
1237	A	298	300	305
1327	205	223	223	212
1439	A	320	322	218
1531	A	347	349	355
1627	A	369	374	378

L1 to L4 in Table 16 may correspond to different truncation lengths. For example, L1 corresponds to a truncation length of 24, L2 corresponds to a truncation length of 30, L3 corresponds to a truncation length of 36, and L4 corresponds to a truncation length of 72. The beneficial effects are as described above and will not be repeated here. Taking N=571 as an example, if the existing technology is directly extended and v ₁ =0, v ₂ =1, and v ₃ =1, then the cross-correlation value of the three base sequences of a sequence group when the truncation length is 30 is the largest For 14.2dB, huge inter-sequence interference is introduced. But if the table 16 is used

W=-V=-69, then the cross-correlation value of the three base sequences of a sequence group at a truncation length of 30 is a maximum of 3.5dB, which is 10.7dB lower than the former, and the inter-sequence interference introduced is greatly reduced.

In an eleventh possible implementation manner, the absolute value of V is any integer in L1 or L2 or L3, and the relationship between L1 or L2 or L3 and N satisfies at least one row in Table 17 below. Optionally, in this implementation, the root index of the first ZC sequence of q _1, q root index of the ZC sequence of the second _2, the third root index q of the ZC sequence according to the formula ₃ (b )determine:

among them,

Optionally, let v ₁ =0,

u is the group ID or cell ID of the first sequence group, and B is an integer greater than 1, for example, B=31. At this time, W=-V.

Table 17

N	L1	L2	L3
113	17	12	6
139	10	6	3
167	29	7	2
191	14	32	39
211	15	39	38
107	8	8	8
239	17	11	56
283	20	15	7
311	twenty two	29	7
359	26	18	9
383	27	66	66
431	31	twenty two	11
449	32	88	11
479	91	117	118
523	98	66	60
571	42	30	twenty two
619	44	122	68
661	114	114	121
719	124	141	18
761	131	149	134
787	136	156	194
811	140	161	200
863	163	110	twenty two
911	157	179	225
953	183	232	235
997	172	198	246
1051	181	208	259
1103	208	269	272
1151	198	228	30
1237	298	300	305
1327	222	223	223
1439	320	322	235

1531	347	349	355
1627	369	374	378

The beneficial effect of this implementation is that the cross-correlation of at least two truncated length sequences can be optimized, and the V and W can be determined to better match the frequency selection characteristics of the channel. For example, using L1

To determine V, the cross-correlation of sequences with two truncation lengths of 24 and 30 can be made relatively low. Use the one in L2

The cross-correlation of sequences with two truncation lengths of 36 and 30 can be made relatively low. Use L3

The cross-correlation of sequences with two truncation lengths 36 and 72 can be made relatively low. Of course, the above is only an example, and L1 to L3 may also correspond to other truncated lengths, which will not be repeated here.

In a twelfth possible implementation manner, the relationship between the absolute value of V and N satisfies at least one row in Table 18-1, or at least one row in Table 18-2. Optionally, in this implementation, the root index of the first ZC sequence of q _1, q root index of the ZC sequence of the second _2, the third root index q of the ZC sequence according to the formula ₃ (c )determine:

among them,

Optionally, let v ₁ =0,

u is the group ID or cell ID of the first sequence group, and B is an integer greater than 1, for example, B=31. At this time, W=-V.

Table 18-1

N	V
113	6
139	twenty four
167	29
191	33
211	39
107	8
239	41
283	49
311	76
359	62
383	66
431	52
449	77
479	117
523	90
571	98
619	107
661	114
719	124
761	131
787	136
811	140
863	208
911	157
953	230
997	172
1051	181
1103	266

1151	198
1237	298
1327	205
1439	322
1531	349
1627	369

Table 18-2

N	V
113	17
139	10
167	29
191	14
211	15
107	8
239	17
283	20
311	twenty two
359	26
383	27
431	31
449	32
479	91
523	98
571	42
619	44
661	114
719	124
761	131
787	136
811	140
863	163
911	157
953	183
997	172
1051	181
1103	208
1151	198
1237	298
1327	222
1439	320
1531	347
1627	369

The beneficial effect of this implementation is that the cross-correlation of the two truncated length sequences of 30 and 36 can be optimized, and the V and W can be determined to better match the frequency selection characteristics of the channel. In actual systems, 30 and 36 are two commonly used truncation lengths, matching the channel-related bandwidth in most scenarios. Other beneficial effects are as described above and will not be repeated here.

According to the method provided in the embodiment of the present application, when a sequence group includes at least three sequences, when any one of the first to twelfth implementation manners is satisfied, the network device may treat at least three sequences in the same sequence group. The base sequence of length is allocated to different terminal devices at the same time, so that the number of terminal devices that can support the simultaneous transmission of reference signal sequences in one cell becomes at least three times the original. At the same time, since the root index of the ZC sequence that generates at least three base sequences of the same length in a sequence group is redesigned, it can be guaranteed that the cross-correlation of at least three base sequences in a sequence group is very low, and the interference between sequences Compared with the signal is much lower, the accuracy of channel estimation based on the reference signal sequence is improved. Examples of specific gains are as described above and will not be repeated here. In addition, the method provided in the embodiments of the present application provides corresponding absolute values of V and W for different values of N, which can ensure that the cross-correlation of the base sequence is very low under various values of M. For example, N=571, if the same V=24 and W=-24 as N=139, the cross-correlation of the three base sequences will be as high as 5.6dB at the truncation length of 30; V=69, W=-69, then the cross-correlation may be less than or equal to 3.5dB.

As shown in FIG. 2, it is a schematic structural diagram of a terminal device provided by an embodiment of the present application. The terminal device may be used to perform the actions of the terminal device in the foregoing method embodiments. The terminal device 200 includes a processing unit 201 and a transceiver unit 202.

The processing unit 201 is used to generate a reference signal sequence of length M, where M is an integer greater than 1;

The reference signal sequence is generated by a base sequence of length M in the first sequence group allocated to the terminal device, the number of base sequences of length M in the first sequence group is X, and the X The i-th base sequence in the base sequence is generated by a ZC sequence of length N and root index q _i , q _i is an integer from 1 to N-1, N is an integer greater than 1, when i When the values are different, the values of q _i are different; where X is an integer greater than or equal to 2, the root index of the first ZC sequence corresponding to the first sequence of any two of the X base sequences Is q, the root index of the second ZC sequence corresponding to the second sequence of any two base sequences is (q+V) mod N, and the absolute value of V is greater than or equal to K1 and less than or equal to N-K1 Integer, K1>1; or, when X is an integer greater than or equal to 3, the root index of the first ZC sequence is q, and the root index of the second ZC sequence is (q+V) mod N, generating the first The root index of the third ZC sequence of the three sequences is (q+W) mod N, the absolute value of V is 1, the absolute value of W is greater than K2 and less than N-K2, K2>2, or, the The absolute value of V and the absolute value of W are integers greater than or equal to K3 and less than or equal to N-K3, K3>1, and the third sequence is the X base sequences except the first sequence and the Any base sequence other than the second sequence;

The transceiver unit 202 is configured to send the reference signal sequence.

In a possible design, the i-th base sequence among the X base sequences satisfies the following formula:

Where s _i (m), m = 0, 1, ..., M-1 is the i-th base sequence,

To generate the ZC sequence of the i-th base sequence.

In a possible design, the transceiver unit 202 is also used to:

Acquiring first indication information and second indication information; the first indication information is used to indicate the group identifier of the first sequence group or the cell identifier of the first sequence group, and the second indication information is used to indicate Describe one of the X base sequences;

The processing unit 201 is configured to acquire the reference signal sequence according to the first indication information and the second indication information.

In a possible design, when the group identifier of the first sequence group is u1, the value of V is V1, and when the group identifier of the first sequence group is u2, the value of V is V2 , U1 and u2 are different, V1 and V2 are different;

Alternatively, when the cell identifier of the first sequence group is c1, the value of V is V1, and the value of V is V1. When the cell identifier of the first sequence group is c2, the value of V The value is V2, there are different c1 and c2, and V1 and V2 are different.

Through the above method, the value of V is related to the group identifier or the cell identifier of the first sequence group. In the sequence groups that are helpful for the network device to allocate, each sequence group includes the number of base sequences of length M. There may be many, so that more terminal devices in the same cell support sending reference signal sequences on the same time-frequency resources, and ensure that the inter-sequence interference is small.

In a possible design, when the length of the first ZC sequence and the length of the second ZC sequence are both the first length, the value of V is V1, and the length of the first ZC sequence is When the length of the second ZC sequence is the second length, the value of V is V2; there is a difference between the first length and the second length, the absolute value of V1 and the absolute value of V2 different.

In a possible design, the absolute value of V is any integer in set A1 or set A2 or set A3 or set A4, and the relationship between set A1 or set A2 or set A3 or set A4 and N satisfies the table At least one line in 2. The content of Table 2 is specifically described in the example section, and will not be repeated here.

In a possible design, when X is an integer greater than or equal to 3, the V and the W satisfy the following formula:

W=-V; or, W=V/2; or, W=2V; or, V is an odd number, W=(N+V)/2; or, V is an odd number, W=(NV)/2; or , V is an odd number, W=-(NV)/2.

In a possible design, the absolute value of V is any integer in set S1 or set S2 or set S3 or set S4, and the relationship between set S1 or set S2 or set S3 or set S4 and N satisfies the table At least one line in 7. The content of Table 7 is specifically described in the example section, and will not be repeated here.

In a possible design, the root index q _i of the ZC sequence generating the i-th base sequence among the X base sequences satisfies at least one of the following formulas:

B is an integer greater than 1, u is an integer determined according to the group identifier of the first sequence group or the cell identifier of the first sequence group, and v _i is the set A={0,a ₁ ,...,a The elements in _X-1 }, a _i is an integer;

Where, when X is an integer greater than or equal to 2, | a _i | ≥ 2, i = 1, ..., X-1; or, when X is an integer greater than or equal to 3, | a _i | = 1, | a _j |≥3, i is an integer greater than or equal to 1 and less than or equal to X-1, j=1,.. ., X-1 and j is not equal to i; or X=3, the set

|a|≥1; or X=3, set

|a|≥1; or X=3, set A={0,a,-a},|a|≥2.

FIG. 3 is a schematic structural diagram of a terminal device provided by an embodiment of the present application. The terminal device shown in FIG. 3 may be a hardware circuit implementation manner of the terminal device shown in FIG. 2. For ease of explanation, FIG. 3 shows only the main components of the terminal device. As shown in FIG. 3, the terminal device 300 includes an application processor 301, a memory 302, a modem processor 303, an antenna 304, and a display screen 305. The application processor 301 is mainly used to process communication protocols and communication data, and to control the entire terminal device, execute a software program, and process data of the software program, for example, to support the terminal device to perform the actions described in the above method embodiments For example, sending a first request message to the first cell. The memory 302 is mainly used to store software programs and data. The modem processor 303 is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal. The antenna 304 is mainly used to cooperate with the modem processor 303 to send and receive radio frequency signals in the form of electromagnetic waves. The display screen 305 is mainly used to receive instructions input by the user and display images and data to the user. The terminal device 300 may also include other components, such as a speaker, etc., which will not be repeated here.

The application processor 301 is used to generate a reference signal sequence of length M, where M is an integer greater than 1;

The reference signal sequence is generated by a base sequence of length M in the first sequence group allocated to the terminal device, the number of base sequences of length M in the first sequence group is X, and the X The i-th base sequence in the base sequence is generated by a ZC sequence of length N and root index q _i , q _i is an integer from 1 to N-1, N is an integer greater than 1, when i When the values are different, the values of q _i are different; where X is an integer greater than or equal to 2, the root index of the first ZC sequence corresponding to the first sequence of any two of the X base sequences Is q, the root index of the second ZC sequence corresponding to the second sequence of any two base sequences is (q+V) mod N, and the absolute value of V is greater than or equal to K1 and less than or equal to N-K1 Integer, K1>1; or, when X is an integer greater than or equal to 3, the root index of the first ZC sequence is q, and the root index of the second ZC sequence is (q+V) mod N, generating the first The root index of the third ZC sequence of the three sequences is (q+W) mod N, the absolute value of V is 1, the absolute value of W is greater than K2 and less than N-K2, K2>2, or, the The absolute value of V and the absolute value of W are integers greater than or equal to K3 and less than or equal to N-K3, K3>1, and the third sequence is the X base sequences except the first sequence and the Any base sequence other than the second sequence;

The modem processor 303 is configured to send the reference signal sequence.

In a possible design, the i-th base sequence among the X base sequences satisfies the following formula:

Where s _i (m), m = 0, 1, ..., M-1 is the i-th base sequence,

To generate the ZC sequence of the i-th base sequence.

In a possible design, the modem processor 303 is also used to:

Acquiring first indication information and second indication information; the first indication information is used to indicate the group identifier of the first sequence group or the cell identifier of the first sequence group, and the second indication information is used to indicate Describe one of the X base sequences;

The application processor 301 is configured to obtain the reference signal sequence according to the first indication information and the second indication information.

In a possible design, when the group identifier of the first sequence group is u1, the value of V is V1, and when the group identifier of the first sequence group is u2, the value of V is V2 , U1 and u2 are different, V1 and V2 are different;

Alternatively, when the cell identifier of the first sequence group is c1, the value of V is V1, and the value of V is V1. When the cell identifier of the first sequence group is c2, the value of V The value is V2, there are different c1 and c2, and V1 and V2 are different.

In a possible design, when the length of the first ZC sequence and the length of the second ZC sequence are both the first length, the value of V is V1, and the length of the first ZC sequence is When the length of the second ZC sequence is the second length, the value of V is V2; there is a difference between the first length and the second length, the absolute value of V1 and the absolute value of V2 different.

In a possible design, the absolute value of V is any integer in set A1 or set A2 or set A3 or set A4, and the relationship between set A1 or set A2 or set A3 or set A4 and N satisfies the table At least one line in 2. The content of Table 2 is specifically described in the example section, and will not be repeated here.

In a possible design, when X is an integer greater than or equal to 3, the V and the W satisfy the following formula:

W=-V; or, W=V/2; or, W=2V; or, V is an odd number, W=(N+V)/2; or, V is an odd number, W=(NV)/2; or , V is an odd number, W=-(NV)/2.

In a possible design, the absolute value of V is any integer in set S1 or set S2 or set S3 or set S4, and the relationship between set S1 or set S2 or set S3 or set S4 and N satisfies the table At least one line in 7. The content of Table 7 is specifically described in the example section, and will not be repeated here.

In a possible design, the root index q _i of the ZC sequence generating the i-th base sequence among the X base sequences satisfies at least one of the following formulas:

B is an integer greater than 1, u is an integer determined according to the group identifier of the first sequence group or the cell identifier of the first sequence group, and v _i is the set A={0,a ₁ ,...,a The elements in _X-1 }, a _i is an integer;

Where, when X is an integer greater than or equal to 2, | a _i | ≥ 2, i = 1, ..., X-1; or, when X is an integer greater than or equal to 3, | a _i | = 1, | a _j |≥3, i is an integer greater than or equal to 1 and less than or equal to X-1, j=1,..., X-1 and j is not equal to i; or X=3, the set

|a|≥1; or X=3, set

|a|≥1; or X=3, set A={0,a,-a},|a|≥2.

As shown in FIG. 4, it is a schematic structural diagram of a network device according to an embodiment of this application. The network device may be used to perform the actions of the network device in the foregoing method embodiments. The network device 400 includes: a sending unit 401 and a receiving unit 402.

The sending unit 401 is used to send configuration information, 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 number of the X base sequences i base sequences are generated by a ZC sequence of length N and root index q _i , q _i is an integer from 1 to N-1, N is an integer greater than 1, when the value of i is different, q The value of _i is different; where X is an integer greater than or equal to 2, the root index of the first ZC sequence corresponding to the first sequence of any two of the X base sequences is q, the arbitrary The root index of the second ZC sequence corresponding to the second sequence of the two base sequences is (q+V) mod N, the absolute value of V is an integer greater than or equal to K1 and less than or equal to N-K1, and K1>1; Alternatively, when X is an integer greater than or equal to 3, the root index of the first ZC sequence is q, and the root index of the second ZC sequence is (q+V) mod N, generating a third ZC of the third sequence The root index of the sequence is (q+W) mod N, the absolute value of V is 1, the absolute value of W is greater than K2 and less than N-K2, K2>2, or the absolute value of V and The absolute value of W is an integer greater than or equal to K3 and less than or equal to N-K3, K3>1, the third sequence is the X base sequence except the first sequence and the second sequence Any base sequence;

The receiving unit 402 is configured to receive a reference signal sequence, where the reference signal sequence is a base sequence in the first sequence group.

In a possible design, the i-th base sequence among the X base sequences satisfies the following formula:

Where s _i (m), m = 0, 1, ..., M-1 is the i-th base sequence,

To generate the ZC sequence of the i-th base sequence.

In a possible design, the sending unit 401 is further used to:

The network device sends first indication information and second indication information; the first indication information is used to indicate the group identifier of the first sequence group or the cell identifier of the first sequence group, and the second indication information It is used to indicate one of the X base sequences.

In a possible design, when the group identifier of the first sequence group is u1, the value of V is V1, and when the group identifier of the first sequence group is u2, the value of V is V2 , There is a difference between u1 and u2, and V1 is different from V2; or, when the cell identifier of the first sequence group is c1, the value of V is V1, and the value of V is the first sequence group of V1 When the cell identifier of c2 is V2, the value of V is V2, and c1 and c2 are different, and V1 and V2 are different.

In a possible design, when the length of the first ZC sequence and the length of the second ZC sequence are both the first length, the value of V is V1, and the length of the first ZC sequence is When the length of the second ZC sequence is the second length, the value of V is V2; there is a difference between the first length and the second length, the absolute value of V1 and the absolute value of V2 different.

For different base sequence lengths M, the inter-sequence interference of base sequences of the same length in the first sequence group can be very small. For the base sequences of different lengths, for all base sequences of different lengths, if the absolute values of V all take the same value, it will result in only a few values of length M, the The interference between the base sequences is very small, and under other values of length M, the interference between the base sequences in the first sequence group is large. When the network device allocates the first sequence group to the terminal devices in the cell, the problem that the sequence interference between the terminal devices that send reference signal sequences of the same length is relatively large may occur. Therefore, under different base sequence lengths M, the absolute value of V has different values, which can make the sequence interference between multiple terminal devices transmitting any reference signal sequence of the same length in the same cell very small , While not increasing the intersequence interference of different sequence groups.

In a possible design, the absolute value of V is any integer in set A1 or set A2 or set A3 or set A4, and the relationship between set A1 or set A2 or set A3 or set A4 and N satisfies the table At least one line in 2. The content of Table 2 is specifically described in the example section, and will not be repeated here.

In a possible design, when X is an integer greater than or equal to 3, the V and the W satisfy the following formula:

W=-V; or, W=V/2; or, W=2V; or, V is an odd number, W=(N+V)/2; or, V is an odd number, W=(NV)/2; or , V is an odd number, W=-(NV)/2.

In a possible design, the absolute value of V is any integer in set S1 or set S2 or set S3 or set S4, and the relationship between set S1 or set S2 or set S3 or set S4 and N satisfies the table At least one line in 7. The content of Table 7 is specifically described in the example section, and will not be repeated here.

In a possible design, the root index q _i of the ZC sequence generating the i-th base sequence among the X base sequences satisfies at least one of the following formulas:

B is an integer greater than 1, u is an integer determined according to the group identifier of the first sequence group or the cell identifier of the first sequence group, and v _i is the set A={0,a ₁ ,...,a The elements in _X-1 }, a _i is an integer;

Where, when X is an integer greater than or equal to 2, | a _i | ≥ 2, i = 1, ..., X-1; or, when X is an integer greater than or equal to 3, | a _i | = 1, | a _j |≥3, i is an integer greater than or equal to 1 and less than or equal to X-1, j=1,..., X-1 and j is not equal to i; or X=3, the set

|a|≥1; or X=3, set

|a|≥1; or X=3, set A={0,a,-a},|a|≥2.

As shown in FIG. 5, it is a schematic structural diagram of a network device according to an embodiment of this application. The network device may be used to perform the actions of the network device in the foregoing method embodiments. The network device shown in FIG. 5 may be a hardware circuit implementation of the network device shown in FIG. 4. For ease of explanation, FIG. 5 shows only the main components of the communication device. Optionally, the communication device may be a network device, or a device in the network device, such as a chip or a chip system, wherein the chip system includes at least one chip, and the chip system may further include other circuit structures and/or Discrete devices. Optionally, taking the communication device as a network device as an example, as shown in FIG. 5, the network device 500 includes a processor 501, a memory 502, a transceiver 503, an antenna 504, and the like.

The transceiver 503 is used to send configuration information, and 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 number of the X base sequences i base sequences are generated by a ZC sequence of length N and root index q _i , q _i is an integer from 1 to N-1, N is an integer greater than 1, when the value of i is different, q The value of _i is different; where X is an integer greater than or equal to 2, the root index of the first ZC sequence corresponding to the first sequence of any two of the X base sequences is q, the arbitrary The root index of the second ZC sequence corresponding to the second sequence of the two base sequences is (q+V) mod N, the absolute value of V is an integer greater than or equal to K1 and less than or equal to N-K1, and K1>1; Alternatively, when X is an integer greater than or equal to 3, the root index of the first ZC sequence is q, and the root index of the second ZC sequence is (q+V) mod N, generating a third ZC of the third sequence The root index of the sequence is (q+W) mod N, the absolute value of V is 1, the absolute value of W is greater than K2 and less than N-K2, K2>2, or the absolute value of V and The absolute value of W is an integer greater than or equal to K3 and less than or equal to N-K3, K3>1, the third sequence is the X base sequence except the first sequence and the second sequence Any base sequence;

The transceiver 503 is configured to receive a reference signal sequence, and the reference signal sequence is a base sequence in the first sequence group.

In a possible design, the i-th base sequence among the X base sequences satisfies the following formula:

Where s _i (m), m = 0, 1, ..., M-1 is the i-th base sequence,

To generate the ZC sequence of the i-th base sequence.

In a possible design, the transceiver 503 is also used to:

The network device sends first indication information and second indication information; the first indication information is used to indicate the group identifier of the first sequence group or the cell identifier of the first sequence group, and the second indication information It is used to indicate one of the X base sequences.

In a possible design, when the group identifier of the first sequence group is u1, the value of V is V1, and when the group identifier of the first sequence group is u2, the value of V is V2 , There is a difference between u1 and u2, and V1 is different from V2; or, when the cell identifier of the first sequence group is c1, the value of V is V1, and the value of V is the first sequence group of V1 When the cell identifier of c2 is V2, the value of V is V2, and c1 and c2 are different, and V1 and V2 are different.

In a possible design, when the length of the first ZC sequence and the length of the second ZC sequence are both the first length, the value of V is V1, and the length of the first ZC sequence is When the length of the second ZC sequence is the second length, the value of V is V2; there is a difference between the first length and the second length, the absolute value of V1 and the absolute value of V2 different.

For different base sequence lengths M, the inter-sequence interference of base sequences of the same length in the first sequence group can be very small. For the base sequences of different lengths, for all base sequences of different lengths, if the absolute values of V all take the same value, it will result in only a few values of length M, the The interference between the base sequences is very small, and under other values of length M, the interference between the base sequences in the first sequence group is large. When the network device allocates the first sequence group to the terminal devices in the cell, the problem that the sequence interference between the terminal devices that send reference signal sequences of the same length is relatively large may occur. Therefore, under different base sequence lengths M, the absolute value of V has different values, which can make the sequence interference between multiple terminal devices transmitting any reference signal sequence of the same length in the same cell very small , While not increasing the intersequence interference of different sequence groups.

In a possible design, the absolute value of V is any integer in set A1 or set A2 or set A3 or set A4, and the relationship between set A1 or set A2 or set A3 or set A4 and N satisfies the table At least one line in 2. The content of Table 2 is specifically described in the example section, and will not be repeated here.

In a possible design, when X is an integer greater than or equal to 3, the V and the W satisfy the following formula:

W=-V; or, W=V/2; or, W=2V; or, V is an odd number, W=(N+V)/2; or, V is an odd number, W=(NV)/2; or , V is an odd number, W=-(NV)/2.

In a possible design, the absolute value of V is any integer in set S1 or set S2 or set S3 or set S4, and the relationship between set S1 or set S2 or set S3 or set S4 and N satisfies the table At least one line in 7. The content of Table 7 is specifically described in the example section, and will not be repeated here.

In a possible design, the root index q _i of the ZC sequence generating the i-th base sequence among the X base sequences satisfies at least one of the following formulas:

B is an integer greater than 1, u is an integer determined according to the group identifier of the first sequence group or the cell identifier of the first sequence group, and v _i is the set A={0,a ₁ ,...,a The elements in _X-1 }, a _i is an integer;

Where, when X is an integer greater than or equal to 2, | a _i | ≥ 2, i = 1, ..., X-1; or, when X is an integer greater than or equal to 3, | a _i | = 1, | a _j |≥3, i is an integer greater than or equal to 1 and less than or equal to X-1, j=1,..., X-1 and j is not equal to i; or X=3, the set

|a|≥1; or X=3, set

|a|≥1; or X=3, set A={0,a,-a},|a|≥2. Optionally, each element of the set A is various possible values of the absolute value of V.

In the foregoing embodiment, the network device configures the first sequence group for the terminal device through the configuration information, so that the terminal device can determine a base sequence of length M from the first sequence group to generate the reference signal sequence. In another possible implementation manner, the network device may also directly indicate the base sequence for generating the reference signal sequence to the terminal device, which is described in detail below.

As shown in FIG. 6, it is a schematic flowchart of a communication method provided by an embodiment of the present application. The method includes:

Step 601: The network device sends second configuration information, where the second configuration information is used to configure the first sequence.

The specific implementation manner of the second configuration information is not limited in this embodiment of the present application, and details are not described herein again.

Step 602: The terminal device receives second configuration information from the network device, and generates a reference signal sequence of length M according to the first sequence indicated by the second configuration information. M is an integer greater than 1.

The above reference signal sequence is determined by a first sequence of length M, the first sequence is one of H base sequences, and H is an integer greater than 30. For the generation method of any one of the H base sequences, reference may be made to the description in the method flow shown in FIG. 1. The H base sequences include H ₀ base sequences, H ₀ is an integer, and 30<H ₀ ≤H, the root of the ZC sequence corresponding to the i-th base sequence in the H ₀ base sequences is

The above-mentioned "H base sequences" refer to H base sequences composed of all possible values indicated by the configuration information. The "all possible values of configuration information" may be the values of sequence indexes of base sequences available in the network, for example, there are a total of 60 available base sequences in the network, and all possible values of the configuration information are 60 The value of the sequence index of an available base sequence.

The above "H base sequences composed of base sequences indicated by all possible values of the configuration information" refers to: H base sequences are all the possibilities of configuring all the configuration information of the first sequence specified in the standard The base sequence indicated by the value. For example, in the current 3GPP standard, the configuration information includes a sequence group index and a sequence number (sequence) number, where the value range of the sequence group index is 0 to 29, and the value of the sequence number is 0 or 1, the configuration information The base sequences indicated by all possible values are the 60 base sequences indicated by the 30 possible values indexed by the sequence group and the 2 possible values of the sequence number.

In a possible implementation, H>30,

The value of belongs to the set

Where B is a positive integer,

Reason

Determined integer,

It is an integer from 0 to N-1, and V is an integer. The absolute value of V is an integer greater than or equal to K1 and less than or equal to N-K1, and K1>1.

In another possible implementation, H>60,

The value of belongs to the set

Where B is a positive integer,

Reason

Determined integer,

An integer from 0 to N-1, the absolute value of V is 1, the absolute value of W is greater than K2 and less than N-K2, K2>2, or the absolute value of V and W are greater than or equal to K3 and less than or equal to The integer of N-K3, K3>1.

It should be understood that the absolute value range of V and W in this embodiment is the same as the method described in FIG. 1 above. Compared with the method described in FIG. 1, in the H base sequences in this embodiment The relationship between the partial base sequences of is the same as the relationship between the base sequences in the first sequence group in the method described in FIG. 1, so the description of the range of the absolute values of V and W can refer to FIG. 1. The method will not be repeated here.

In the embodiment of the present application, there is no concept of a sequence group, and the above-mentioned first sequence is directly determined by the terminal device from H base sequences of length M.

It should be understood that the terminal device acquires the reference signal sequence of length M, which may be that the terminal device generates the reference signal sequence according to the first sequence and the predefined rules, or that the terminal device obtains the pre-generated reference signal sequence by looking up the table. This application The embodiment does not limit this.

The above reference signal sequence is determined by the first sequence of length M. It can be understood that the reference signal sequence may be generated by the first sequence, or the reference signal sequence may be obtained according to the first sequence table lookup. Similarly, the above-mentioned first sequence is determined by a ZC sequence of length N. It can be understood that the first sequence can be generated from the ZC sequence, or the first sequence can be obtained according to the ZC sequence table lookup. This embodiment of the present application does not limit this.

In a possible design, the first sequence is generated by the ZC sequence, and the reference signal sequence is generated by the first sequence. Optionally, the terminal device may generate the reference signal sequence to be sent according to the pre-defined rules and/or other signaling configurations according to the base sequence (the first sequence in this embodiment) among the above H base sequences.

For example, the h-th base sequence among the H base sequences satisfies the following formula:

Where s _h (m), m = 0, 1, ..., M-1 is the h-th base sequence,

To generate the ZC sequence of the h-th base sequence.

It should be noted that, in this embodiment, the terminal device is not required to store the H base sequences, but the terminal device can, according to the predefined rules and/or other signaling configurations, be able to store the H base sequences when needed. The first sequence in the base sequence generates the reference signal sequence to be transmitted.

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

In the embodiment 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 sequence corresponding to the first ZC sequence refers to the first ZC sequence that generates the first sequence. The "correspondence" herein refers to this relationship of generating base sequences from ZC sequences. In addition, the above H base sequences are generated from H ZC sequences of length N, which means that the H base sequences are respectively generated from corresponding ZC sequences, and the corresponding ZC sequences are different from each other.

Through the communication method provided by the embodiments of the present application, the number of base sequences that can be scheduled by the base station is increased, so that different terminal devices in the same cell can use multiple reference signal sequences determined by base sequences of the same length, and when the same time The reference signal is transmitted on the frequency resource, so that the number of terminal devices capable of transmitting the reference signal of the same length at the same frequency increases at the same time, and the interference power between the reference signal sequences can be guaranteed to be very low while increasing the number of reference signal sequences. It is beneficial to improve the accuracy of the network device's channel measurement based on the reference signal.

In a possible implementation, the second configuration information may indicate the first sequence from the H base sequences. The terminal device may determine the first sequence according to the second configuration information, so as to obtain the reference signal sequence of length M according to the first sequence. The above second configuration information indicates the first sequence, which may be a direct indication or an indirect indication, which is not limited in this embodiment of the present application. For example, the second configuration information may be a sequence identifier of the first sequence, and the terminal device may directly determine the first sequence according to the sequence identifier; or, the second configuration information may be parameters used to generate the first sequence

with

Terminal equipment can be based on parameters

with

Calculate the root q ₁ of the first sequence, and then generate the first sequence according to the following method; or, the second configuration information may be directly the root q ₁ of the above first sequence, and the terminal device may use the root q ₁ and the following formula Generate the first sequence s ₁ (m) of length M:

In a possible design, when the H base sequences correspond to H ZC sequences of the first length, the value of V is V1, and the H lengths corresponding to the H base sequences are the second For a ZC sequence of a length, the value of V is V2; there is a difference between the first length and the second length, and the absolute value of V1 is different from the absolute value of V2.

In a possible design, when H is an integer greater than 60, the V and the W satisfy the following formula:

W=-V; or, W=V/2; or, W=2V; or, V is an odd number, W=(N+V)/2; or, V is an odd number, W=(NV)/2; or , V is an odd number, W=-(NV)/2.

As an optional embodiment, the root of the ZC sequence of the hth base sequence in the H base sequences

Meet at least one of the following formulas:

Where, B is an integer greater than 1, for example, B=31.

Is a collection

The element in, a _i is an integer,

I _h is a sequence index (sequenceId) corresponding to the h-th base sequence in the H base sequences, and h is an integer greater than or equal to 1 and less than or equal to H.

In a possible implementation, when H is an integer greater than 30,

Optionally, a _i is an integer determined according to V, and the description of the range of the absolute value of V can refer to the method described in FIG. 1 when X is an integer greater than or equal to 2;

In the second possible implementation, when H is an integer greater than 60, |a _i |=1, |a _j |≥3, i is greater than or equal to 1 and less than or equal to

An integer of,

And j is not equal to i; or H is an integer greater than 60, the set

|a|≥1; or H is an integer greater than 60, the set

|a|≥1; or H is an integer greater than 60, set A={0,a,-a},|a|≥2.

Exemplarily, when H is an integer greater than 60, |a _i |=1, |a _j |≥3, under this condition, the absolute value of V can be referred to the second possible In scenarios, that is, scenarios in which each sequence group includes at least 3 sequences, descriptions in the first to the twelfth possible implementation manners. The value of W can be determined according to the value of V.

Exemplarily, H is an integer greater than 60, set

|a|≥1, under this condition, in one implementation, the absolute value of V is any integer in set S1 or set S2 or set S3 or set S4, and the set S1 or set S2 or The relationship between set S3 or set S4 and N satisfies at least one row in Table 7. Correspondingly, the value of W can be determined according to formula (4-3) or (4-4).

In another implementation manner, the absolute value of V is L1 or L2 or L3 or L4, and the relationship between L1 or L2 or L3 or L4 and N satisfies at least one row in Table 8. Correspondingly, the value of W can be determined according to the formula W=(N+V)/2.

Exemplarily, H is an integer greater than 60, set

|a|≥1, under this condition, the absolute value of V may be at least one row in Tables 9 to 13-2. Correspondingly, the value of W can be determined according to the formula W=(N+V)/2.

Exemplarily, H is an integer greater than 60, and when the set A = {0, a, -a}, |a| ≥ 2, under this condition, the absolute value of V may be from Table 14 to At least one line in 18. Correspondingly, the value of W can be determined according to the formula W=-V.

Step 603: The terminal device sends the reference signal sequence.

Step 604: The network device receives the reference signal sequence from the terminal device.

In the above method, in the prior art, all terminal devices in a cell can only use the same base sequence to generate the reference signal sequence, which results in the time division method for different terminal devices to send the reference signal sequence in turn, resulting in the reference signal The transmission cycle of the sequence is large. Using the method provided in the embodiment of the present application, in one cell, the network device may indicate different base sequences to different terminal devices, so that in one cell, different terminal devices may use different base sequences to generate reference signal sequences, and different terminals The device can therefore use different base sequences to send reference signal sequences at the same time, which can improve the accuracy of channel estimation based on the reference signal sequences and avoid serious outdated channel state information problems. At the same time, when different terminal devices use different base sequences to generate reference signal sequences, different terminal devices can use different base sequences to send reference signal sequences at the same time, which can shorten the interval between the terminal device sending reference signal sequences and avoid outdated channel state information. problem.

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Moreover, the present application may take the form of a computer program product implemented on one or more computer usable storage media (including but not limited to disk storage, optical storage, etc.) containing computer usable program code.

This application is described with reference to flowcharts and/or block diagrams of the method, device (system), and computer program product according to this application. It should be understood that each flow and/or block in the flowchart and/or block diagram and a combination of the flow and/or block in the flowchart and/or block diagram may be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, special-purpose computer, embedded processing machine, or other programmable data processing device to produce a machine that enables the generation of instructions executed by the processor of the computer or other programmable data processing device An apparatus for realizing the functions specified in one block or multiple blocks of one flow or multiple flows of a flowchart and/or one block or multiple blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory that can guide a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including an instruction device, the instructions The device implements the functions specified in one block or multiple blocks of the flowchart one flow or multiple flows and/or block diagrams.

Obviously, those skilled in the art can make various modifications and variations to this application without departing from the scope of this application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims (30)

1. A communication method, characterized in that it includes:

   The terminal device generates a reference signal sequence of length M, where M is an integer greater than 1;

   The reference signal sequence is generated by a base sequence of length M in the first sequence group assigned to the terminal device, and the number of base sequences of length M in the first sequence group is X, so The i-th base sequence out of the X base sequences is generated by a ZC sequence of length N and root index q _i , q _i is an integer from 1 to N-1, N is an integer greater than 1, when When the value of _i is different, the value of q _i is different; where X is an integer greater than or equal to 2, the first ZC sequence corresponding to the first sequence in any two of the X base sequences corresponds to the first The root index is q, the root index of the second ZC sequence corresponding to the second sequence in any two base sequences is (q+V) mod N, and the absolute value of V is greater than or equal to K1 and less than or equal to N- An integer of K1, K1>1; or, when X is an integer greater than or equal to 3, the root index of the first ZC sequence is q, and the root index of the second ZC sequence is (q+V) mod N, The root index of the third ZC sequence that generates the third sequence is (q+W) mod N, the absolute value of V is 1, the absolute value of W is greater than K2 and less than N-K2, and K2>2, or, The absolute value of the V and the absolute value of the W are integers greater than or equal to K3 and less than or equal to N-K3, K3>1, and the third sequence is the X base sequence divided by the first sequence and Any base sequence other than the second sequence;

   The terminal device sends the reference signal sequence.
2. The method according to claim 1, wherein the i-th base sequence of the X base sequences satisfies the following formula:

   

   Where s _i (m), m = 0, 1, ..., M-1 is the i-th base sequence,

   

   n=0,1,...,N-1 is the ZC sequence that generates the i-th base sequence.
3. The method according to any one of claims 1 to 2, wherein the method further comprises:

   The terminal device obtains first indication information and second indication information; the first indication information is used to indicate the group identifier of the first sequence group or the cell identifier of the first sequence group, and the second indication information Used to indicate one of the X base sequences;

   The terminal device obtains the reference signal sequence according to the first indication information and the second indication information.
4. The method according to claim 3, wherein when the group identifier of the first sequence group is u1, the value of V is V1, and when the group identifier of the first sequence group is u2, the The value of V is V2, there are different u1 and u2, and different V1 and V2;

   Alternatively, when the cell identifier of the first sequence group is c1, the value of V is V1, and the value of V is V1. When the cell identifier of the first sequence group is c2, the value of V The value is V2, there are different c1 and c2, and V1 and V2 are different.
5. The method according to any one of claims 1 to 4, wherein when the length of the first ZC sequence and the length of the second ZC sequence are both the first length, the value of V is V1, When the length of the first ZC sequence and the length of the second ZC sequence are both the second length, the value of V is V2;

   There is a difference between the first length and the second length, and the absolute value of V1 is different from the absolute value of V2.
6. The method according to any one of claims 1 to 5, wherein the absolute value of V is any integer in set A1 or set A2 or set A3 or set A4, and set A1 or set A2 or set The relationship between A3 or set A4 and N satisfies at least one row in the following table:

   N A1 A2 A3 A4 71 31,27,15 27,28,20 20,28,4 35,24 83 7,34,4 20,2,10 2,38,36 41,28 107 4,51,34 37,22,4 49,26,30 53,36 113 54,5,27 46,3,39 3,48,13 56,30 139 5,6,29 4,48,5 4,59,3 2,47,41 167 80,6,7 23,68,6 4,18,47 2,55,36 191 8,7,91 66,5,33 5,93,28 2,57,63 211 101,9,8 6,83,29 6,5,103 104,3,52 239 38,10,115 7,94,115 6,7,117 3,118,59 241 10,115,116 7,116,98 6,7,95 3,119,61 251 10,120,11 86,7,122 122,7,6 3,124,62 257 123,10,11 9,62,7 125,7,6 3,127,34 263 126,11,10 8,9,107 7,128,6 3,130,58 269 11,129,10 8,37,7 7,131,92 3,133,91 271 11,130,10 8,7,93 7,132,115 3,134,89 277 11,10,12 109,8,95 7,135,8 3,91,4 281 11,135,12 8,10,97 7,8,137 4,3,139 283 45,11,136 8,10,97 8,7,138 4,93,3 311 149,13,12 150,9,151 8,151,9 4,105,21 359 172,13,14 11,173,123 9,10,175 177,5,4 383 15,183,16 13,11,186 10,186,9 5,189,126 431 17,206,18 208,13,15 11,12,210 6,5,213 449 18,215,216 14,15,13 12,218,11 6,5,24 457 18,219,20 14,13,222 12,222,13 6,5,226 461 221,19,18 14,13,16 12,224,13 6,5,228 463 161,19,222 14,16,13 12,225,13 6,5,229 467 19,224,17 14,16,225 12,227,13 6,5,231 487 233,20,19 15,235,14 13,237,12 6,240,160 491 235,20,236 15,14,237 13,239,14 6,242,7 499 20,239,18 17,242,15 13,243,14 6,246,7 503 20,241,22 17,244,15 13,14,245 248,6,7 509 177,20,244 17,15,247 13,14,248 7,251,6 521 21,249,250 16,205,15 14,13,253 7,257,6 523 21,250,19 16,15,18 14,254,13 7,258,6 541 259,22,86 18,261,16 263,14,15 7,267,178 547 22,262,87 17,264,16 266,14,15 7,270,6 557 22,267,23 269,17,270 15,14,271 7,275,183 563 23,269,270 19,16,273 15,274,14 7,278,8 569 23,272,273 19,276,17 15,277,16 7,281,8 571 23,273,25 19,277,17 15,278,16 7,282,8 619 25,296,27 19,299,21 301,16,17 8,7,305 661 316,27,26 22,319,20 18,17,321 9,8,326 719 344,29,250 24,22,347 18,19,350 9,355,10

   761 364,31,30 24,369,367 370,19,20 10,9,376 787 32,377,31 26,380,24 21,20,383 10,388,11 811 388,33,282 25,27,393 22,21,394 11,10,400 863 413,35,34 27,417,29 23,22,420 11,426,12 911 436,37,36 28,440,30 23,443,24 12,11,450 953 456,38,39 32,30,29 24,26,25 12,13,470 967 39,463,38 30,32,467 26,25,470 13,12,477 971 39,465,35 30,469,32 26,25,472 13,12,479 977 39,468,467 472,30,31 26,25,475 13,482,12 983 39,40,470 475,33,31 25,478,26 13,485,12 991 40,474,39 479,31,33 25,482,27 13,12,489 997 40,477,36 31,33,481 27,485,25 13,12,492 1009 483,40,41 31,34,32 27,491,26 13,498,14 1013 485,41,40 34,32,31 27,26,493 13,500,14 1019 41,488,487 34,32,492 26,27,28 13,14,503 1021 41,489,355 32,34,493 26,27,28 13,14,504 1031 41,493,42 32,498,34 26,28,27 13,14,509 1033 41,494,42 32,499,34 28,26,27 13,14,510 1039 497,42,41 502,32,35 28,26,27 13,14,513 1049 42,502,43 507,35,33 28,510,27 14,13,518 1051 42,503,43 508,35,33 28,511,27 14,13,519 1103 44,528,45 533,34,37 28,30,29 14,15,544 1151 46,551,47 36,556,38 31,29,560 15,14,568 1237 592,50,49 598,39,38 33,31,602 16,17,15 1291 52,618,51 40,624,43 35,628,33 17,16,637 1297 52,621,451 627,40,43 35,33,631 17,16,640 1301 52,623,53 629,40,41 35,33,633 17,16,642 1303 52,624,53 630,41,40 35,33,634 17,16,643 1307 52,53,625 41,44,40 33,35,636 17,18,645 1319 53,631,632 41,44,637 35,36,33 17,18,16 1321 53,632,54 41,44,638 36,35,34 17,18,16 1327 635,53,54 41,44,641 36,34,35 17,16,18 1439 58,689,57 45,48,695 39,700,36 18,19,710 1531 61,733,62 740,48,51 41,39,745 20,19,21 1583 63,64,758 49,765,53 40,770,43 21,20,781 1627 65,779,66 51,786,54 44,41,43 21,22,20 .
7. The method according to any one of claims 1 to 6, wherein, when X is an integer greater than or equal to 3, the V and the W satisfy the following formula:

   W=-V; or, W=V/2; or, W=2V; or, V is an odd number, W=(N+V)/2; or, V is an odd number, W=(NV)/2; or , V is an odd number, W=-(NV)/2.
8. The method according to claim 7, wherein the absolute value of V is any integer in set S1 or set S2 or set S3 or set S4, and set S1 or set S2 or set S3 or set S4 The relationship with N satisfies at least one row in the following table;

   N S1 S2 S3 S4 97 71,73,95,49 71,95,1,73 95,71,1,73 1,49,95,73 113 35,79,107,89 35,107,89,39 107,17,39,35 1,57,63,13 139 127,129,7,73 91,131,43,129 3,131,71,21 135,57,15,137

   167 7,153,87,155 31,155,109,87 159,3,73,121 163,57,95,131 191 9,175,177,91 125,5,23,145 5,181,33,75 57,77,187,97 211 9,193,137,101 199,5,39,83 5,199,139,201 3,107,159,205 107 99,39,23,91 99,47,23,91 47,37,91,23 1,53,29,105 239 9,163,11,219 9,157,141,105 5,227,157,181 3,121,233,59 283 11,193,13,259 7,147,185,11 7,267,145,269 3,275,143,97 311 13,11,285,15 11,9,161,7 9,7,159,295 303,277,3,101 359 15,13,245,329 13,235,9,141 9,175,339,285 5,177,349,241 383 15,17,351,261 11,357,251,9 11,9,197,187 5,189,257,329 431 19,17,15,395 15,223,11,327 11,407,9,221 5,419,289,213 449 19,17,21,411 13,419,17,233 13,11,219,231 5,437,227,335 479 21,19,17,327 17,447,13,11 13,11,245,233 7,243,5,81 523 21,23,19,357 15,19,271,343 15,13,255,415 7,265,509,351 571 25,23,21,523 17,21,15,275 15,17,13,539 7,289,555,383 619 27,25,23,29 21,19,17,23 17,15,19,317 7,9,305,497 661 29,27,25,451 23,19,433,25 17,19,15,435 9,335,7,163 719 31,29,27,33 25,21,27,471 19,17,21,351 9,355,699,59 761 33,31,29,27 23,27,21,499 21,19,23,371 9,11,511,385 787 33,31,35,29 27,23,407,29 21,19,23,743 11,9,399,765 811 35,33,31,29 25,23,29,531 23,21,19,395 11,9,411,537 863 37,35,33,31 29,25,31,447 23,25,21,421 11,839,437,9 911 39,37,35,33 31,27,33,471 25,23,27,21 11,13,461,449 953 41,39,37,35 29,33,27,493 25,27,23,29 13,11,483,631 997 43,41,39,37 31,35,29,37 27,25,29,23 13,11,505,669 1051 45,43,41,47 35,37,31,29 29,27,25,31 13,15,519,533 1103 47,45,43,49 37,33,39,31 29,31,27,33 15,13,559,545 1151 49,47,45,51 39,35,41,33 31,29,33,27 15,13,1119,583 1237 53,51,49,47 41,43,37,35 33,31,35,29 17,15,627,611 1291 55,53,51,57 43,39,45,37 35,33,37,31 17,15,867,19 1327 57,53,55,51 45,41,47,39 35,37,33,39 17,19,15,891 1439 61,63,59,57 49,45,43,51 39,41,37,35 19,17,21,729 1531 65,67,61,63 51,47,53,45 41,39,43,37 21,19,17,755 1583 69,67,63,65 53,49,55,47 43,45,41,39 21,19,801,23 1627 71,69,65,67 55,51,49,57 45,43,41,47 21,23,19,825 .
9. The method according to any one of claims 1 to 8, wherein the root index q _i of the ZC sequence generating the i-th base sequence among the X base sequences satisfies at least one of the following formulas:

   

   

   

   

   B is an integer greater than 1, u is an integer determined according to the group identifier of the first sequence group or the cell identifier of the first sequence group, and v _i is the set A={0,a ₁ ,...,a The elements in _X-1 }, a _i is an integer;

   When X is an integer greater than or equal to 2, | a _i | ≥ 2, i = 1, ..., X-1; or, when X is an integer greater than or equal to 3, | a _i | = 1, | a _j | ≥3, i is an integer greater than or equal to 1 and less than or equal to X-1, j=1,.. ., X-1 and j is not equal to i; or X=3, the set

   

   |a|≥1; or X=3, set

   

   |a|≥2; or X=3, set A={0,-a,a},|a|≥2.
10. A communication method, characterized in that it includes:

    The network device sends configuration information, which 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 i-th base sequence in the X base sequences Is generated by a ZC sequence of length N and root index q _i , q _i is an integer from 1 to N-1, N is an integer greater than 1, when the value of i is different, the value of q _i Different; wherein, when X is an integer greater than or equal to 2, the root index of the first ZC sequence corresponding to the first sequence of any two of the X base sequences is q, and any two base sequences The root index of the second ZC sequence corresponding to the second sequence in is (q+V) mod N, the absolute value of V is an integer greater than or equal to K1 and less than or equal to N-K1, K1>1; or, X is When the integer is greater than or equal to 3, the root index of the first ZC sequence is q, and the root index of the second ZC sequence is (q+V) mod N, and the root index of the third ZC sequence of the third sequence is generated Is (q+W) mod N, the absolute value of V is 1, the absolute value of W is greater than K2 and less than N-K2, K2>2, or the absolute value of V and the absolute value of W The value is an integer greater than or equal to K3 and less than or equal to N-K3, K3>1, the third sequence is any one of the X base sequences except the first sequence and the second sequence ;

    The network device receives a reference signal sequence, and the reference signal sequence is a base sequence in the first sequence group.
11. The method according to claim 10, wherein the i-th base sequence among the X base sequences satisfies the following formula:

    

    Where s _i (m), m = 0, 1, ..., M-1 is the i-th base sequence,

    

    n=0,1,...,N-1 is the ZC sequence that generates the i-th base sequence.
12. The method according to claim 10 or 11, wherein the method further comprises:

    The network device sends first indication information and second indication information; the first indication information is used to indicate the group identifier of the first sequence group or the cell identifier of the first sequence group, and the second indication information It is used to indicate one of the X base sequences.
13. The method according to claim 12, wherein when the group identifier of the first sequence group is u1, the value of V is V1, and when the group identifier of the first sequence group is u2, the The value of V is V2, there are different u1 and u2, and different V1 and V2;

    Alternatively, when the cell identifier of the first sequence group is c1, the value of V is V1, and the value of V is V1. When the cell identifier of the first sequence group is c2, the value of V The value is V2, there are different c1 and c2, and V1 and V2 are different.
14. The method according to any one of claims 10 to 13, wherein when the length of the first ZC sequence and the length of the second ZC sequence are both the first length, the value of V is V1, When the length of the first ZC sequence and the length of the second ZC sequence are both the second length, the value of V is V2;

    There is a difference between the first length and the second length, and the absolute value of V1 is different from the absolute value of V2.
15. The method according to any one of claims 10 to 14, wherein the absolute value of V is any integer in set A1 or set A2 or set A3 or set A4, and set A1 or set A2 or set The relationship between A3 or set A4 and N satisfies at least one row in the following table:

    N A1 A2 A3 A4 71 31,27,15 27,28,20 20,28,4 35,24 83 7,34,4 20,2,10 2,38,36 41,28 107 4,51,34 37,22,4 49,26,30 53,36 113 54,5,27 46,3,39 3,48,13 56,30 139 5,6,29 4,48,5 4,59,3 2,47,41 167 80,6,7 23,68,6 4,18,47 2,55,36 191 8,7,91 66,5,33 5,93,28 2,57,63 211 101,9,8 6,83,29 6,5,103 104,3,52 239 38,10,115 7,94,115 6,7,117 3,118,59 241 10,115,116 7,116,98 6,7,95 3,119,61 251 10,120,11 86,7,122 122,7,6 3,124,62 257 123,10,11 9,62,7 125,7,6 3,127,34 263 126,11,10 8,9,107 7,128,6 3,130,58 269 11,129,10 8,37,7 7,131,92 3,133,91 271 11,130,10 8,7,93 7,132,115 3,134,89 277 11,10,12 109,8,95 7,135,8 3,91,4 281 11,135,12 8,10,97 7,8,137 4,3,139 283 45,11,136 8,10,97 8,7,138 4,93,3 311 149,13,12 150,9,151 8,151,9 4,105,21 359 172,13,14 11,173,123 9,10,175 177,5,4 383 15,183,16 13,11,186 10,186,9 5,189,126 431 17,206,18 208,13,15 11,12,210 6,5,213 449 18,215,216 14,15,13 12,218,11 6,5,24 457 18,219,20 14,13,222 12,222,13 6,5,226 461 221,19,18 14,13,16 12,224,13 6,5,228 463 161,19,222 14,16,13 12,225,13 6,5,229 467 19,224,17 14,16,225 12,227,13 6,5,231 487 233,20,19 15,235,14 13,237,12 6,240,160 491 235,20,236 15,14,237 13,239,14 6,242,7 499 20,239,18 17,242,15 13,243,14 6,246,7 503 20,241,22 17,244,15 13,14,245 248,6,7 509 177,20,244 17,15,247 13,14,248 7,251,6 521 21,249,250 16,205,15 14,13,253 7,257,6 523 21,250,19 16,15,18 14,254,13 7,258,6 541 259,22,86 18,261,16 263,14,15 7,267,178 547 22,262,87 17,264,16 266,14,15 7,270,6 557 22,267,23 269,17,270 15,14,271 7,275,183 563 23,269,270 19,16,273 15,274,14 7,278,8 569 23,272,273 19,276,17 15,277,16 7,281,8 571 23,273,25 19,277,17 15,278,16 7,282,8 619 25,296,27 19,299,21 301,16,17 8,7,305

    661 316,27,26 22,319,20 18,17,321 9,8,326 719 344,29,250 24,22,347 18,19,350 9,355,10 761 364,31,30 24,369,367 370,19,20 10,9,376 787 32,377,31 26,380,24 21,20,383 10,388,11 811 388,33,282 25,27,393 22,21,394 11,10,400 863 413,35,34 27,417,29 23,22,420 11,426,12 911 436,37,36 28,440,30 23,443,24 12,11,450 953 456,38,39 32,30,29 24,26,25 12,13,470 967 39,463,38 30,32,467 26,25,470 13,12,477 971 39,465,35 30,469,32 26,25,472 13,12,479 977 39,468,467 472,30,31 26,25,475 13,482,12 983 39,40,470 475,33,31 25,478,26 13,485,12 991 40,474,39 479,31,33 25,482,27 13,12,489 997 40,477,36 31,33,481 27,485,25 13,12,492 1009 483,40,41 31,34,32 27,491,26 13,498,14 1013 485,41,40 34,32,31 27,26,493 13,500,14 1019 41,488,487 34,32,492 26,27,28 13,14,503 1021 41,489,355 32,34,493 26,27,28 13,14,504 1031 41,493,42 32,498,34 26,28,27 13,14,509 1033 41,494,42 32,499,34 28,26,27 13,14,510 1039 497,42,41 502,32,35 28,26,27 13,14,513 1049 42,502,43 507,35,33 28,510,27 14,13,518 1051 42,503,43 508,35,33 28,511,27 14,13,519 1103 44,528,45 533,34,37 28,30,29 14,15,544 1151 46,551,47 36,556,38 31,29,560 15,14,568 1237 592,50,49 598,39,38 33,31,602 16,17,15 1291 52,618,51 40,624,43 35,628,33 17,16,637 1297 52,621,451 627,40,43 35,33,631 17,16,640 1301 52,623,53 629,40,41 35,33,633 17,16,642 1303 52,624,53 630,41,40 35,33,634 17,16,643 1307 52,53,625 41,44,40 33,35,636 17,18,645 1319 53,631,632 41,44,637 35,36,33 17,18,16 1321 53,632,54 41,44,638 36,35,34 17,18,16 1327 635,53,54 41,44,641 36,34,35 17,16,18 1439 58,689,57 45,48,695 39,700,36 18,19,710 1531 61,733,62 740,48,51 41,39,745 20,19,21 1583 63,64,758 49,765,53 40,770,43 21,20,781 1627 65,779,66 51,786,54 44,41,43 21,22,20 .
16. The method according to any one of claims 10 to 15, wherein when X is an integer greater than or equal to 3, the V and the W satisfy the following formula:

    W=-V; or, W=V/2; or, W=2V; or, V is an odd number, W=(N+V)/2; or, V is an odd number, W=(NV)/2; or , V is an odd number, W=-(NV)/2.
17. The method according to claim 16, wherein the absolute value of V is any integer in set S1 or set S2 or set S3 or set S4, and set S1 or set S2 or set S3 or set S4 The relationship with N satisfies at least one row in the following table;

    N S1 S2 S3 S4

    97 71,73,95,49 71,95,1,73 95,71,1,73 1,49,95,73 113 35,79,107,89 35,107,89,39 107,17,39,35 1,57,63,13 139 127,129,7,73 91,131,43,129 3,131,71,21 135,57,15,137 167 7,153,87,155 31,155,109,87 159,3,73,121 163,57,95,131 191 9,175,177,91 125,5,23,145 5,181,33,75 57,77,187,97 211 9,193,137,101 199,5,39,83 5,199,139,201 3,107,159,205 107 99,39,23,91 99,47,23,91 47,37,91,23 1,53,29,105 239 9,163,11,219 9,157,141,105 5,227,157,181 3,121,233,59 283 11,193,13,259 7,147,185,11 7,267,145,269 3,275,143,97 311 13,11,285,15 11,9,161,7 9,7,159,295 303,277,3,101 359 15,13,245,329 13,235,9,141 9,175,339,285 5,177,349,241 383 15,17,351,261 11,357,251,9 11,9,197,187 5,189,257,329 431 19,17,15,395 15,223,11,327 11,407,9,221 5,419,289,213 449 19,17,21,411 13,419,17,233 13,11,219,231 5,437,227,335 479 21,19,17,327 17,447,13,11 13,11,245,233 7,243,5,81 523 21,23,19,357 15,19,271,343 15,13,255,415 7,265,509,351 571 25,23,21,523 17,21,15,275 15,17,13,539 7,289,555,383 619 27,25,23,29 21,19,17,23 17,15,19,317 7,9,305,497 661 29,27,25,451 23,19,433,25 17,19,15,435 9,335,7,163 719 31,29,27,33 25,21,27,471 19,17,21,351 9,355,699,59 761 33,31,29,27 23,27,21,499 21,19,23,371 9,11,511,385 787 33,31,35,29 27,23,407,29 21,19,23,743 11,9,399,765 811 35,33,31,29 25,23,29,531 23,21,19,395 11,9,411,537 863 37,35,33,31 29,25,31,447 23,25,21,421 11,839,437,9 911 39,37,35,33 31,27,33,471 25,23,27,21 11,13,461,449 953 41,39,37,35 29,33,27,493 25,27,23,29 13,11,483,631 997 43,41,39,37 31,35,29,37 27,25,29,23 13,11,505,669 1051 45,43,41,47 35,37,31,29 29,27,25,31 13,15,519,533 1103 47,45,43,49 37,33,39,31 29,31,27,33 15,13,559,545

    1151 49,47,45,51 39,35,41,33 31,29,33,27 15,13,1119,583 1237 53,51,49,47 41,43,37,35 33,31,35,29 17,15,627,611 1291 55,53,51,57 43,39,45,37 35,33,37,31 17,15,867,19 1327 57,53,55,51 45,41,47,39 35,37,33,39 17,19,15,891 1439 61,63,59,57 49,45,43,51 39,41,37,35 19,17,21,729 1531 65,67,61,63 51,47,53,45 41,39,43,37 21,19,17,755 1583 69,67,63,65 53,49,55,47 43,45,41,39 21,19,801,23 1627 71,69,65,67 55,51,49,57 45,43,41,47 21,23,19,825 .
18. The method according to any one of claims 10 to 17, wherein the root index q _i of the ZC sequence generating the i-th base sequence among the X base sequences satisfies at least one of the following formulas:

    

    

    

    

    B is an integer greater than 1, u is an integer determined according to the group identifier of the first sequence group or the cell identifier of the first sequence group, and vi is the set A = {0, a ₁ ,..., a _{X -1} } elements, a _i is an integer;

    Where, when X is an integer greater than or equal to 2, | a _i | ≥ 2, i = 1, ..., X-1; or, when X is an integer greater than or equal to 3, | a _i | = 1, | a _j |≥3, i is an integer greater than or equal to 1 and less than or equal to X-1, j=1,..., X-1 and j is not equal to i; or X=3, the set

    

    |a|≥1; or X=3, set

    

    |a|≥1; or X=3, set A={0,a,-a},|a|≥2.
19. A communication device, characterized in that it includes:

    The processing unit is used to generate a reference signal sequence of length M, where M is an integer greater than 1;

    The reference signal sequence is generated by a base sequence of length M in the first sequence group allocated to the terminal device, the number of base sequences of length M in the first sequence group is X, and the X The i-th base sequence in the base sequence is generated by a ZC sequence of length N and root index q _i , q _i is an integer from 1 to N-1, N is an integer greater than 1, when i When the values are different, the values of q _i are different; where X is an integer greater than or equal to 2, the root index of the first ZC sequence corresponding to the first sequence of any two of the X base sequences Is q, the root index of the second sequence in any two base sequences corresponding to the second ZC sequence is (q+V) mod N, and the absolute value of V is an integer greater than or equal to K1 and less than or equal to N-K1 , K1>1; or, when X is an integer greater than or equal to 3, the root index of the first ZC sequence is q, and the root index of the second ZC sequence is (q+V) mod N, generating a third The root index of the third ZC sequence of the sequence is (q+W) mod N, the absolute value of V is 1, the absolute value of W is greater than K2 and less than N-K2, K2>2, or, the V The absolute value of W and the absolute value of W are integers greater than or equal to K3 and less than or equal to N-K3, K3>1, the third sequence is the X base sequence except the first sequence and the first Any base sequence other than the second sequence;

    The transceiver unit is used to send the reference signal sequence.
20. The apparatus according to claim 19, wherein the i-th base sequence among the X base sequences satisfies the following formula:

    

    Where s _i (m), m = 0, 1, ..., M-1 is the i-th base sequence,

    

    n=0,1,...,N-1 is the ZC sequence that generates the i-th base sequence.
21. The apparatus according to any one of claims 19 to 20, wherein the transceiver unit is further used to:

    Acquiring first indication information and second indication information; the first indication information is used to indicate the group identifier of the first sequence group or the cell identifier of the first sequence group, and the second indication information is used to indicate Describe one of the X base sequences;

    The processing unit is configured to acquire the reference signal sequence according to the first indication information and the second indication information.
22. The apparatus according to claim 21, wherein when the group identifier of the first sequence group is u1, the value of V is V1, and when the group identifier of the first sequence group is u2, the The value of V is V2, there are different u1 and u2, and different V1 and V2;

    Alternatively, when the cell identifier of the first sequence group is c1, the value of V is V1, and the value of V is V1. When the cell identifier of the first sequence group is c2, the value of V The value is V2, there are different c1 and c2, and V1 and V2 are different.
23. The device according to any one of claims 19 to 22, wherein when X is an integer greater than or equal to 3, the V and the W satisfy the following formula:

    W=-V; or, W=V/2; or, W=2V; or, V is an odd number, W=(N+V)/2; or, V is an odd number, W=(NV)/2; or , V is an odd number, W=-(NV)/2.
24. A communication device, characterized in that it includes:

    A sending unit, configured to send configuration information, 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 i-th of the X base sequences A base sequence is generated by a ZC sequence of length N and root index q _i , where q _i is an integer from 1 to N-1, and N is an integer greater than 1, when the value of i is different, q _i The value of is different; where X is an integer greater than or equal to 2, the root index of the first ZC sequence corresponding to the first sequence of any two of the X base sequences is q, and the arbitrary two The root index of the second sequence in the base sequence corresponding to the second ZC sequence is (q+V) mod N, and the absolute value of V is an integer greater than or equal to K1 and less than or equal to N-K1, K1>1; or, When X is an integer greater than or equal to 3, the root index of the first ZC sequence is q, and the root index of the second ZC sequence is (q+V) mod N, generating the third ZC sequence of the third sequence The root index is (q+W) mod N, the absolute value of V is 1, the absolute value of W is greater than K2 and less than N-K2, K2>2, or the absolute value of V and the W The absolute value of is an integer greater than or equal to K3 and less than or equal to N-K3, K3>1, the third sequence is any of the X base sequences except the first sequence and the second sequence Base sequence

    The receiving unit is configured to receive a reference signal sequence, and the reference signal sequence is a base sequence in the first sequence group.
25. The apparatus according to claim 24, wherein the sending unit is further configured to:

    Sending first indication information and second indication information; the first indication information is used to indicate the group identifier of the first sequence group or the cell identifier of the first sequence group, and the second indication information is used to indicate Describe one of the X base sequences.
26. The apparatus according to claim 25, wherein when the group identifier of the first sequence group is u1, the value of V is V1, and when the group identifier of the first sequence group is u2, the The value of V is V2, there are different u1 and u2, and different V1 and V2;

    Alternatively, when the cell identifier of the first sequence group is c1, the value of V is V1, and the value of V is V1. When the cell identifier of the first sequence group is c2, the value of V The value is V2, there are different c1 and c2, and V1 and V2 are different.
27. The device according to any one of claims 24 to 26, wherein when the length of the first ZC sequence and the length of the second ZC sequence are both the first length, the value of V is V1, When the length of the first ZC sequence and the length of the second ZC sequence are both the second length, the value of V is V2;

    There is a difference between the first length and the second length, and the absolute value of V1 is different from the absolute value of V2.
28. A communication device, comprising: a memory and a processor, the memory is used to store instructions, the processor is used to execute the instructions stored in the memory, and the execution of the instructions stored in the memory causes, The processor is used to perform the method according to any one of claims 1 to 18.
29. A computer-readable storage medium, characterized in that it includes computer-readable instructions, and when the communication device reads and executes the computer-readable instructions, the communication device is caused to execute any one of claims 1 to 18. The method described.
30. A computer program product, characterized in that it includes computer readable instructions, and when the communication device reads and executes the computer readable instructions, the communication device executes the method according to any one of claims 1 to 18. .

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