WO2020094155A1

WO2020094155A1 - Reference signal sending method and device

Info

Publication number: WO2020094155A1
Application number: PCT/CN2019/117209
Authority: WO
Inventors: 龚政委; 吴亮; 张蕾; 王磊
Original assignee: 华为技术有限公司
Priority date: 2018-11-09
Filing date: 2019-11-11
Publication date: 2020-05-14
Also published as: CN111181884B; CN111181884A

Abstract

Provided are a reference signal sending method and device. The method comprises: a terminal device determining a root sequence index value of the terminal device according to information of the coverage level of the terminal device and a pre-defined ordered root sequence index value set, wherein the lower the coverage level of the terminal device, the smaller the coverage associated indication value corresponding to the root sequence index value of the terminal device; and generating and sending a reference signal according to the root sequence index value of the terminal device. In the embodiments of the present application, a root sequence index value with a smaller coverage associated indication value is selected for a terminal device with poorer coverage, so that the terminal device with the poorer coverage can transmit high-power data while using the reference signal in this embodiment. Moreover, the root sequence index values are ordered according to the size of the coverage associated indication value, thereby facilitating the selection of a root sequence index value with a smaller coverage associated indication value from the multiple root sequence index values.

Description

Reference signal transmission method and equipment

This application requires the priority of a Chinese patent application filed on November 11, 2018 in the Chinese Patent Office with the application number 201811334501.8 and the application name "Reference Signal Transmission Method and Equipment", the entire contents of which are incorporated by reference in this application.

Technical field

The present application relates to the field of communications, and in particular to a method and device for sending reference signals.

Background technique

With more and more application scenarios of the Internet of Things, the communication network as the basis of the Internet of Things is facing the demand for large-scale random access, and the location of the access user is not fixed. The current IoT technologies such as ZigBee / LoWPAN or IEEE802.11ah are only suitable for short-distance IoT coverage, and cannot guarantee reliable network coordination and control. However, the current satellite communications have high costs, high energy consumption, and cannot reach indoors. Therefore, a high-performance cellular network with wide area coverage is an important technology that limits the development of the Internet of Things.

In the traditional cellular network, the uplink transmission of the terminal device is based on scheduling to achieve transmission, and there is a problem of large signaling overhead. When the terminal device sends data to the network device in a competitive manner, it is necessary to configure a large set of reference signal sequences for the accessed terminal device to avoid collision caused by different terminals sending the same reference signal sequence. Different terminal devices send different reference signals, so that the network device realizes user identification based on the reference signals.

Traditionally different reference signal generation methods are based on pseudo-random PN sequences. Based on the setting of different pseudo-random seeds, a large number of reference signals can be obtained, and each reference signal has a good low correlation characteristic, but the peak-to-average power ratio of the reference signal generated by the PN sequence (Peak to Average Power Ratio) , PAPR) is usually large, a large PAPR will affect the power amplifier efficiency of the terminal, making it difficult for the terminal equipment to perform high-power data transmission.

Summary of the invention

The present application provides a reference signal transmission method and device to solve the problem that the PAPR corresponding to the existing reference signal generated based on the PN sequence is usually large, which affects the high-power data transmission of the terminal device.

The first aspect of the present application provides a reference signal transmission method, which is applied to a terminal device side, and the terminal device determines the root sequence index value of the terminal device according to the coverage level information of the terminal device and a predefined sorted root sequence index value set; The root sequence index value of the terminal device generates and sends a reference signal of the terminal device. The lower the coverage level of the terminal device, the smaller the coverage indication value corresponding to the root sequence index value of the terminal device.

By selecting a root sequence index value with a lower coverage association value for a terminal device with poor coverage, the terminal device with poor coverage can also perform high-power data transmission when using the reference signal in this embodiment, and at the same time, The root sequence index values are sorted according to the size of the coverage association indication value, which facilitates the selection of the root sequence index value with a smaller coverage association indication value from multiple root sequence index values.

In a possible implementation manner, the process of determining the root sequence index value of the terminal device may specifically include:

The terminal device determines the first value according to the first parameter set; according to the start value of the root sequence index value and the first value, the first subset of the root sequence index value is determined from the predefined sorted root sequence index value set, according to the terminal The coverage level information of the device and the first subset of root sequence index values determine the root sequence index value of the terminal device.

The first value is the number of root sequence index values selectable by the terminal device, and the first parameter set includes: the total number of reference signal sequences, the cyclic shift interval of the base sequence corresponding to the reference signal and the length of the base sequence corresponding to the reference signal; first The subset of root sequence index values includes consecutive first numerical value root index values from the starting value of the root sequence index value.

By selecting the root sequence index values with consecutive root sequence index values as the first root sequence index value subset of the terminal device, the terminal device can select the root corresponding to different coverage association indication values according to the coverage level in the first root sequence index value subset Sequence index value.

In a possible implementation manner, the manner of determining the root sequence index value of the terminal device in the first subset of the root sequence index value may specifically be:

The terminal device divides the first sequence index subset into the number of coverage levels and the second sequence index subset according to the coverage level division information; according to the coverage index interval corresponding to the coverage level interval of the terminal device, the second sequence index The value subset determines the root sequence index value of the terminal device.

The coverage level division information is used to determine the number of coverage levels and coverage level intervals.

Divide different second sequence index value subsets for terminal devices of different coverage levels, which is convenient for terminal devices to select the root sequence index value in the corresponding second sequence index value subset, avoiding all terminal devices directly in the first root The root sequence index value is selected in the subset of the sequence index value, resulting in an unbalanced selection of the root sequence index value, and the reference signal is likely to collide.

In one possible implementation, the terminal device must first resource mapping interval according to the reference signal, determining a number N _RE resource units for transmitting reference signals; The N _RE, determining a reference signal corresponding to the base sequence length N _ZC, N _ZC is a prime number not greater than N _RE .

In a possible implementation, N _ZC is the largest prime number not greater than N _RE .

In a possible implementation manner, before the terminal device determines the root sequence index value of the terminal device according to the coverage level information of the terminal device and the predefined sorted root sequence index value set, the method further includes:

The terminal apparatus according to the group sequence length N _ZC reference signal corresponding to the determined root sequence index values of the set of predefined reference signal corresponding to the base sequence length N _ZC corresponding sort, a root sequence index value of the root sequence index value set in a corresponding one of The base sequence of length N _ZC , the base sequence is the ZC sequence;

The terminal device generates a reference signal of the terminal device according to the root sequence index value of the terminal device, including:

The terminal device generates the reference signal of the terminal device according to the base sequence corresponding to the root sequence index value of the terminal device.

In a possible implementation, the terminal device generates the reference signal of the terminal device according to the base sequence corresponding to the root sequence index value of the terminal device, including:

The terminal device uses the base sequence corresponding to the root sequence index value of the terminal device as the reference signal sequence of the terminal device, and generates the reference signal of the terminal device according to the reference signal sequence of the terminal device; or,

The terminal device cyclically shifts the base sequence corresponding to the root sequence index value of the terminal device according to the cyclic shift interval and / or the cyclic shift start value to obtain the reference signal sequence of the terminal device, and generates the reference signal sequence of the terminal device The reference signal of the terminal equipment.

By adopting the unexpanded ZC sequence as the reference signal sequence, the correlation between the reference signals can be ensured to be low, and the correlation of the extended ZC sequence can be avoided to be high, which is not conducive to the problem of terminal detection performance.

In a possible implementation manner, the first parameter set further includes: a cyclic shift start value corresponding to the reference signal; the method further includes:

The terminal device receives the cyclic shift start value corresponding to the reference signal sent by the network device.

In a possible implementation, when the resource unit for sending the reference signal is located in a time domain symbol, the reference signal sequence is continuously mapped on the resource unit for sending the reference signal in the frequency resource corresponding to the time domain symbol , And the number of spare resource units at both ends in the frequency resource corresponding to the time domain symbol differs by no more than 1;

The vacant resource unit is a resource unit to which reference signal sequences are not mapped among frequency resources used to transmit reference signals.

In a possible implementation, when the resource unit used to send the reference signal is located in at least two time-domain symbols, the reference signal includes at least two reference signal subsequences, and the at least two reference signal subsequences are continuously mapped to Resource units used to send reference signals in frequency resources corresponding to different time-domain symbols;

Among the at least two reference signal sub-sequences, there is at least one first reference signal sub-sequence and one second reference signal sub-sequence. The element with the smallest number in the first reference signal sub-sequence is mapped to the time-domain symbol mapped by the reference signal sub-sequence The smallest numbered resource unit in the corresponding frequency domain resource, the element with the highest number in the second reference signal subsequence is mapped to the largest numbered resource unit in the frequency domain resource corresponding to the time domain symbol mapped by the reference signal subsequence.

A second aspect of the present application provides a method for sending a reference signal, which is applied to a network device side and has method steps corresponding to the method for sending a reference signal on the terminal device side of the first aspect,

In a possible implementation manner, the network device sends a first parameter set to the terminal device, where the first parameter set includes: the total number of reference signal sequences and the cyclic shift interval of the base sequence corresponding to the reference signal;

The network device receives the reference signal generated by the terminal device according to the first parameter.

In a possible implementation manner, the first parameter set further includes: a cyclic shift start value corresponding to the reference signal.

In a possible implementation manner, the method further includes:

The network device sends at least one of the following to the terminal device:

Coverage level information of terminal equipment, predefined sorted root sequence index value set, root sequence index value start value, cyclic shift start value, coverage division level information, resource mapping interval of reference signal or base corresponding to reference signal Sequence length N _ZC .

The third aspect of the present application provides a codebook generation method, which is applied to a terminal device side.

In a possible implementation, the codebook generation method includes:

The terminal device obtains the coverage level information of the terminal device and the ordered codebook set;

The terminal device determines the codebook subset of the terminal device according to the coverage level of the terminal device and the sorted codebook set;

The terminal device determines the codebook number of the terminal device according to the reference signal sequence number and the first preset mapping relationship;

The terminal device determines the codebook corresponding to the codebook number in the codebook subset;

The first preset mapping relationship is the mapping relationship between the reference signal sequence number and the codebook number, the reference signal sequence number is the number of the reference signal sequence of the terminal device in the second sequence index subset, and the codebook number is The corresponding number of the codeword in the codebook subset determined by the terminal device.

In a possible implementation, the codebook generation method includes:

The terminal device determines the codebook number of the terminal device according to the root sequence index value number and the second preset mapping relationship;

Among them, the second preset mapping relationship is the mapping relationship between the reference signal sequence number and the codebook number, the root sequence index value number is the number of the root sequence index value of the terminal device in the second root sequence index value subset, the codebook The number is the corresponding number of the codeword in the codebook subset determined by the terminal device.

In a possible implementation, the codebook generation method includes:

The terminal device determines the codebook number of the terminal device according to the reference signal sequence number and the third preset mapping relationship;

The terminal device determines the codebook corresponding to the codebook number in the sorted codebook set;

The third preset mapping relationship is the mapping relationship between the reference signal sequence number and the codebook number, the reference signal sequence number is the number of the reference signal sequence of the terminal device in the first sequence index subset, and the codebook number is The codeword number in the sorted codebook collection.

In a possible implementation, the codebook generation method includes:

The terminal device determines the codebook number of the terminal device according to the root sequence index value number and the fourth preset mapping relationship;

The fourth preset mapping relationship is the mapping relationship between the root sequence index value number and the codebook number. The root sequence index value number is the number of the root sequence index value of the terminal device in the first root sequence index value subset, code This number is the codeword number in the sorted codebook set.

In a possible implementation manner, the first root sequence index value subset is determined by the terminal device according to the starting value of the root sequence index value and the first value, in a predefined sorted root sequence index value set, the first value The number of root sequence index values that can be selected by the terminal device. The first value is determined by the terminal device according to a first parameter set. The first parameter set includes: the total number of reference signal sequences, the cyclic shift interval of the base sequence corresponding to the reference signal, and the reference signal The length of the corresponding base sequence.

In a possible implementation manner, the second root sequence index value subset is obtained by the terminal device dividing the first root sequence index value subset according to the coverage level division information.

A fourth aspect of the present application provides a terminal device for performing the reference signal transmission method of the first aspect described above, which has the same or similar technical features and technical effects.

In a possible implementation manner, the terminal device includes:

The processor is used to determine the root sequence index value of the terminal device according to the coverage level information of the terminal device and the pre-defined sorted set of root sequence index values; the lower the coverage level of the terminal device, the corresponding to the root sequence index value of the terminal device The smaller the indication value of the coverage association;

The processor is also used to generate the reference signal of the terminal device according to the root sequence index value of the terminal device;

The transmitter is used to send a reference signal to the network device.

In a possible implementation, the processor is specifically used to,

The first value is determined according to the first parameter set. The first value is the number of root sequence index values selectable by the terminal device. The first parameter set includes: the total number of reference signal sequences, the cyclic shift interval of the base sequence corresponding to the reference signal and the reference The length of the base sequence corresponding to the signal;

According to the starting value of the root sequence index value and the first value, a first subset of the index value of the root sequence is determined from the set of pre-defined sorted root sequence index values. The index value of the root sequence of the first consecutive value from the starting value;

The root sequence index value of the terminal device is determined according to the coverage level information of the terminal device and the first root sequence index value subset.

In a possible implementation, the processor is specifically used to,

According to the coverage level division information, the first sequence index value subset is divided into the coverage level number and the second sequence index value subset; the coverage level division information is used to determine the coverage level number and coverage level interval;

The root sequence index value of the terminal device is determined according to the second root sequence index value subset corresponding to the coverage level interval corresponding to the coverage level of the terminal device.

In a possible implementation, the processor is further configured to determine the number N _RE of resource units used to transmit the reference signal according to the resource mapping interval of the reference signal;

According to N _RE , determine the length of the base sequence corresponding to the reference signal N _ZC , where N _ZC is a prime number not greater than N _RE .

In one possible implementation, the processor is further configured to, in accordance with the sequence length N _ZC base reference signal corresponding to the determined root sequence index values of the set of predefined reference signal corresponding to a base sequence corresponding to the length N _ZC ordered root A root sequence index value in the sequence index value set corresponds to a base sequence of length N _ZC , and the base sequence is a ZC sequence;

The reference signal of the terminal device is generated according to the base sequence corresponding to the root sequence index value of the terminal device.

In a possible implementation manner, the processor is specifically configured to use the base sequence corresponding to the root sequence index value of the terminal device as the reference signal sequence of the terminal device, and generate the reference signal of the terminal device according to the reference signal sequence of the terminal device; or,

Cyclically shift the base sequence corresponding to the root sequence index value of the terminal device according to the cyclic shift interval and / or the cyclic shift start value to obtain the reference signal sequence of the terminal device, and generate the terminal device according to the reference signal sequence of the terminal device Reference signal.

In a possible implementation manner, the first parameter set further includes: a cyclic shift start value corresponding to the reference signal; the terminal device further includes:

The receiver is used to receive the cyclic shift start value corresponding to the reference signal sent by the network device.

A fifth aspect of the present application provides a network device for performing the reference signal transmission method of the second aspect described above, which has the same or similar technical features and technical effects.

In a possible implementation, the network equipment includes:

The transmitter is configured to send a first parameter set to the terminal device, where the first parameter set includes: the total number of reference signal sequences and the cyclic shift interval of the base sequence corresponding to the reference signal;

The receiver is configured to receive the reference signal generated by the terminal device according to the first parameter.

In a possible implementation manner, the sending module is further configured to send at least one of the following to the terminal device:

A sixth aspect of the present application provides a terminal device for performing the codebook generating method of the third aspect, which has the same or similar technical features and technical effects.

In a possible implementation manner, the terminal device includes:

A processor, used to obtain coverage level information and ordered codebook sets of the terminal device;

Determine the codebook subset of the terminal device according to the coverage level of the terminal device and the sorted codebook set;

Determine the codebook number of the terminal device according to the reference signal sequence number and the first preset mapping relationship;

Determine the codebook corresponding to the codebook number in the codebook subset;

In a possible implementation manner, the terminal device includes:

Determine the codebook number of the terminal device according to the root sequence index value number and the second preset mapping relationship;

In a possible implementation manner, the terminal device includes:

A processor, configured to determine the codebook number of the terminal device according to the reference signal sequence number and the third preset mapping relationship; determine the codebook corresponding to the codebook number in the sorted codebook set;

In a possible implementation manner, the terminal device includes:

A processor, configured to determine the codebook number of the terminal device according to the root sequence index value number and the fourth preset mapping relationship; determine the codebook corresponding to the codebook number in the sorted codebook set;

A seventh aspect of the present application provides a terminal device for performing the above-mentioned reference signal transmission method of the first aspect, which has the same or similar technical features and technical effects.

In a possible implementation manner, the terminal device includes:

The root sequence index value determination module is used to determine the root sequence index value of the terminal device according to the coverage level information of the terminal device and the predefined sorted root sequence index value set; the lower the coverage level of the terminal device, the root sequence of the terminal device The smaller the coverage indication value corresponding to the index value;

The reference signal generation module is used to generate the reference signal of the terminal device according to the root sequence index value of the terminal device;

The sending module is used to send the reference signal to the network device.

In a possible implementation, the root sequence index value determination module includes:

The first value acquisition unit is used to determine the first value according to the first parameter set, where the first value is the number of root sequence index values selectable by the terminal device. The cyclic shift interval of the sequence and the length of the base sequence corresponding to the reference signal;

The first sequence index value subset acquisition unit is used to determine the first root sequence index value subset in the pre-defined sorted root sequence index value set according to the starting value of the root sequence index value and the first value, the first The subset of root sequence index values includes consecutive first numerical value root index values from the starting value of the root sequence index value;

The root sequence index value determining unit is used to determine the root sequence index value of the terminal device based on the coverage level information of the terminal device and the first root sequence index value subset.

In a possible implementation manner, the root sequence index value determination unit is specifically used for,

In a possible implementation manner, the terminal device further includes:

The resource unit quantity acquisition module is used to determine the number N _RE of the resource units used to transmit the reference signal according to the resource mapping interval of the reference signal;

The base sequence length acquisition module is used to determine the base sequence length N _ZC corresponding to the reference signal according to N _RE , where N _ZC is a prime number not greater than N _RE .

In a possible implementation manner, the terminal device further includes:

A set of root sequence index value obtaining module, according to sequence length N _ZC base reference signal corresponding to the determined root sequence index values of the set of predefined reference signal corresponding to a base sequence corresponding to the length N _ZC sorted, root sequence index set of values A root sequence index value of corresponds to a base sequence of length N _ZC , which is a ZC sequence;

The reference signal generation module is specifically used to generate the reference signal of the terminal device according to the base sequence corresponding to the root sequence index value of the terminal device.

In a possible implementation, the reference signal generation module is specifically configured to use the base sequence corresponding to the root sequence index value of the terminal device as the reference signal sequence of the terminal device, and generate the reference of the terminal device according to the reference signal sequence of the terminal device Signal; or,

According to the cyclic shift interval and / or the cyclic shift start value, the base sequence corresponding to the root sequence index value of the terminal device is cyclically shifted to obtain the reference signal sequence of the terminal device, and the terminal device is generated according to the reference signal sequence of the terminal device Reference signal.

The receiving module is configured to receive the cyclic shift start value corresponding to the reference signal sent by the network device.

An eighth aspect of the present application provides a network device for performing the reference signal transmission method of the second aspect described above, which has the same or similar technical features and technical effects.

In a possible implementation, the network equipment includes:

A sending module, configured to send a first parameter set to the terminal device, where the first parameter set includes: the total number of reference signal sequences and the cyclic shift interval of the base sequence corresponding to the reference signal;

The receiving module is configured to receive the reference signal generated by the terminal device according to the first parameter.

A ninth aspect of the present application provides a terminal device for performing the codebook generation method of the third aspect, which has the same or similar technical features and technical effects.

In a possible implementation manner, the terminal device includes:

A codebook set acquisition module, which is used to acquire coverage level information and ordered codebook sets of terminal devices;

The codebook subset acquisition module is used to determine the codebook subset of the terminal device according to the coverage level of the terminal device and the sorted codebook set;

A codebook number determining module, configured to determine the codebook number of the terminal device according to the reference signal sequence number and the first preset mapping relationship;

A codebook determination module, used to determine the codebook corresponding to the codebook number in the codebook subset;

In a possible implementation manner, the terminal device includes:

A codebook number determining module, configured to determine the codebook number of the terminal device according to the reference signal sequence number and the second preset mapping relationship;

In a possible implementation manner, the terminal device includes:

A codebook number determining module, configured to determine the codebook number of the terminal device according to the reference signal sequence number and the third preset mapping relationship;

A codebook determination module, used to determine the codebook corresponding to the codebook number in the sorted codebook set;

In a possible implementation manner, the terminal device includes:

A codebook number determination module, used to determine the codebook number of the terminal device according to the root sequence index value number and the fourth preset mapping relationship;

A tenth aspect of the present application provides a communication system, including: the terminal device in any possible implementation manner of the fourth aspect and the sixth aspect, and the network device in any feasible implementation manner of the fifth aspect.

An eleventh aspect of the present application provides an electronic device, including: a processor, a memory, and a computer program;

The computer program is stored in the memory, and the processor runs the computer program to cause the electronic device to execute the reference signal transmission method according to any one of the above first and second aspects, and the codebook generation according to any one of the above third aspects method.

A twelfth aspect of the present application provides a computer storage medium. The storage medium includes a computer program, and the computer program is used to implement the reference signal transmission method according to any one of the above first and second aspects, and as in the above third aspect The codebook generation method of any item.

A thirteenth aspect of the present application provides a computer program product. The computer program product includes computer program code. When the computer program code is run on a computer, the computer executes the reference signal according to any one of the first aspect and the second aspect. The transmission method, and the codebook generation method according to any one of the above-mentioned third aspects.

A fourteenth aspect of the present application provides a chip including a processor for running a computer program, so that the electronic device mounted with the chip executes the reference signal transmission method according to any one of the above first and second aspects, And the method of generating a codebook as described in any one of the above third aspects.

On the basis of the implementations provided in the above aspects, this application can be further combined to provide more implementations.

BRIEF DESCRIPTION

1 is a schematic structural diagram of a communication system provided by an embodiment of this application;

2 is a schematic flowchart 1 of a method for sending a reference signal provided by an embodiment of the present application;

3 is a second schematic flowchart of a method for sending a reference signal according to an embodiment of the present application;

Figure 4 is a schematic diagram of comb information;

5 is a third schematic flowchart of a method for sending a reference signal according to an embodiment of the present application;

6 is a schematic diagram of determining the number of coverage levels and coverage level intervals according to coverage level information;

FIG. 7 is a schematic diagram 1 of reference signal sequence mapping;

FIG. 8 is a second schematic diagram of reference signal sequence mapping;

9 is a fourth schematic flowchart of a method for sending a reference signal according to an embodiment of the present application;

10 is a schematic flowchart 1 of a codebook generation method provided by an embodiment of this application;

11 is a second schematic flowchart of a codebook generation method provided by an embodiment of the present application;

FIG. 12 is a schematic flowchart 3 of a codebook generation method provided by an embodiment of this application;

13 is a fourth schematic flowchart of a codebook generation method provided by an embodiment of the present application;

14 is a schematic structural diagram of a terminal device according to Embodiment 1 of the present application;

15 is a schematic structural diagram of a network device according to Embodiment 1 of the present application;

16 is a schematic structural diagram of a terminal device according to Embodiment 2 of the present application;

17 is a schematic structural diagram of a terminal device provided in Embodiment 3 of this application;

18 is a schematic structural diagram of a terminal device according to Embodiment 4 of the present application;

19 is a schematic structural diagram of a network device according to Embodiment 2 of the present application;

20 is a schematic structural diagram of a terminal device according to Embodiment 5 of the present application;

21 is a schematic structural diagram of a network device according to Embodiment 3 of the present application.

detailed description

FIG. 1 is a schematic structural diagram of a communication system provided by an embodiment of the present application. As shown in FIG. 1, the communication system may include: a network device 10 and at least one terminal device 20. The communication system provided by the embodiments of the present application may be used in a communication network with a large number of access devices, such as the Internet of Things and a vehicle network.

Among them, the terminal device may be a wireless terminal or a wired terminal, and the wireless terminal may be a device that provides users with voice and / or other service data connectivity, a handheld device with a wireless connection function, or other processing connected to a wireless modem device. The wireless terminal can communicate with one or more core networks via a radio access network (Radio Access Network, RAN). The wireless terminal can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal For example, it may be a portable, pocket-sized, handheld, computer built-in or vehicle-mounted mobile device that exchanges language and / or data with the wireless access network. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital assistants (Personal Digital Assistant), PDA) and other equipment. The wireless terminal may also be called a system, a subscriber unit (Subscriber Unit), a subscriber station (Subscriber Station), a mobile station (Mobile Station), a mobile station (Mobile), a remote station (Remote Station), a remote terminal (Remote Terminal), an access terminal Access terminal (Access Terminal), user terminal (User Terminal), user agent (User Agent), this application is not limited here.

A network device is a device that connects a terminal device to a wireless network. It can be a base transceiver station (Base Transceiver Station, BTS) in the Global System for Mobile (GSM), Universal Mobile Communication System (Universal Base station (Node B) in Mobile Telecommunications System (UMTS), evolutionary base station (Evolutional Node B, eNB or eNodeB) in Long Term Evolution (LTE), or relay station or access point, or future fifth generation Base stations in the 5th Generation Mobile (Communication, 5G) network, or relay stations, access points, in-vehicle devices, wearable devices, etc. working in the high-frequency band, this application is not limited herein.

When a terminal device in a communication system communicates with a network device, the terminal device needs to send a reference signal to the network device, so that the network device distinguishes between the terminal device and different data blocks sent by the same terminal device according to different reference signals. The existing reference signal is usually generated based on a pseudo-random PN sequence, but the reference signal sequence designed based on the PN sequence will affect the high-power data transmission of the terminal device due to the high PAPR.

In order to solve the above problems, the present application provides at least one method and device for sending reference signals in the following embodiments. The following uses specific embodiments to describe in detail the reference signal sending method and device provided by the present application. In the following specific embodiments, the same or similar concepts or processes may not be repeated in some embodiments.

On the one hand, this application provides a reference signal transmission method. FIG. 2 is a first schematic flowchart of a method for sending a reference signal according to an embodiment of the present application. In this embodiment, the terminal device determines the root sequence index value of the terminal device according to the coverage level information of the terminal device and the predefined sorted set of root sequence index values, and the lower the coverage level of the terminal device, the root sequence index of the terminal device The smaller the coverage association indication value corresponding to the value, the lower the correlation of the reference signal generated according to the sequence index value.

As shown in FIG. 2, the reference signal sending method provided by this embodiment includes:

S101. The terminal device determines the root sequence index value of the terminal device according to the coverage level information of the terminal device and the predefined sorted root sequence index value set.

The lower the coverage level of the terminal device, the smaller the coverage indication value corresponding to the root sequence index value of the terminal device.

Exemplarily, the coverage level information of the terminal device indicates the coverage of the terminal device, and the lower the coverage level, the worse the coverage of the terminal device.

Exemplarily, the method for acquiring the coverage level information of the terminal device may specifically be:

The network device sends signals to different terminal devices, and the transmission power of each transmitted signal is the same. Each terminal device measures the received signal after wireless transmission loss to obtain measurement parameters, and obtains coverage level information according to the measurement parameters. The terminal equipment in different locations has different coverage due to different wireless transmission losses.

Optionally, the measurement parameters of the terminal device include at least one of the following: reference signal received power (Reference Signal Receiving Power, RSRP) value, Geometry (geometric metric) value or number and interference plus noise ratio (Signal to Interference plus Noise Ratio, SINR) value. Generally, the larger the measurement parameter value, the higher the coverage level, that is, the better the coverage. Conversely, the smaller the measurement parameter value, the lower the coverage level, the worse the coverage.

Exemplarily, the terminal device stores at least one predefined sorted set of root sequence index values. Exemplarily, in the following embodiments of the present application, the generation of the reference signal will be described by taking the root sequence index value of the ZC sequence as an example. Exemplarily, the root sequence index value refers to _q in the following formula 1 used to generate the ZC (Zadoff-Chu) sequence x _q (m). In addition, N _zc represents the length of a ZC sequence, where 0≤m≤N _zc -1.

Exemplarily, the coverage correlation indication value corresponding to a root sequence index value may be expressed as a PAPR (peak-to-average ratio) or CM (cubic metric) value of the ZC sequence generated by the root sequence index value. The higher the PAPR or CM of a reference signal sequence, the lower the power amplifier efficiency of the transmitting terminal equipment, resulting in worse coverage performance.

Exemplarily, different predefined sorted root sequence index value sets have different base sequence lengths. Exemplarily, Table 1 is a set of pre-defined sorted root sequence index values corresponding to a base sequence length of 31. Table 2 is a set of pre-defined sorted root sequence index values corresponding to a base sequence length of 71.

The terminal device may determine the corresponding predefined sorted set of root sequence index values according to the length of the base sequence required for the reference signal to be generated.

Generally, in the embodiments of the present application, the base sequence may refer to a ZC sequence generated by formula (1) with a root sequence index value.

Alternatively, the base sequence may also be a pseudo-random (PN) sequence determined by a random initialization.

Table 1

Table 2

Exemplarily, when the length of the base sequence is 31, the value of the root sequence index value may be [1, 30]. Each root sequence index value corresponds to a coverage association indicator value. In an embodiment, the coverage association indication value may be the PAPR shown in Table 1 above. Optionally, the coverage association indication value may also be CM (cubic metric cubic metric value).

In this embodiment, it is considered that a large coverage association indicator value makes it difficult for a terminal device with poor coverage to perform high-power data transmission. Therefore, when configuring an available root sequence index value for a terminal device with poor coverage, pass Of the terminal devices select the root sequence index value with a smaller coverage indication value, so that the terminal device with poor coverage can also perform high-power data transmission when using the reference signal in this embodiment.

When selecting a corresponding root sequence index value with a smaller coverage association indication value for a terminal device with poor coverage, in order to conveniently select a root sequence index value with a smaller coverage association indication value from multiple root sequence index values, the root The sequence index values are sorted in order from the largest to the smallest or the smallest to the largest in the coverage association indicator. Table 1 takes the order of PAPR values from small to large as an example. Exemplarily, when the coverage level of the terminal device is lower, the root sequence index value with the smaller serial number can be selected in Table 1.

Exemplarily, considering that the coverage association indication value corresponding to each root sequence index value is fixed, therefore, when the pre-defined sorted set of root sequence index values in the terminal device is stored, refer to Table 2 to store only each root sequence index value And the corresponding serial number, there is no need to store the coverage association indication value corresponding to each root sequence index value.

S102. The terminal device generates a reference signal of the terminal device according to the root sequence index value of the terminal device.

Exemplarily, after the root sequence index value of the terminal device is determined, a reference signal sequence is generated according to the root sequence index value, and then the reference signal sequence is mapped in the reference signal resource to obtain the reference signal.

S103. The terminal device sends a reference signal to the network device.

Exemplarily, the generated reference signal is sent to the network device. Optionally, the reference signal may be sent simultaneously with the data to be sent, or it may be sent separately.

The reference signal transmission method provided in this embodiment includes the terminal device determining the root sequence index value of the terminal device according to the coverage level information of the terminal device and the pre-defined sorted set of root sequence index values; the lower the coverage level of the terminal device, the terminal The device selects the root sequence index value corresponding to the smaller coverage association indication value; the terminal device generates a reference signal of the terminal device according to the root sequence index value of the terminal device; the terminal device sends the reference signal to the network device. In this embodiment, by selecting a root sequence index value with a small coverage association value for a terminal device with poor coverage, the terminal device with poor coverage can also perform high-power data when using the reference signal in this embodiment At the same time, the root sequence index value is sorted according to the size of the coverage association indication value, which facilitates the selection of the root sequence index value with a smaller coverage association indication value from multiple root sequence index values.

Exemplarily, on the basis of the embodiment shown in FIG. 2, the present application further provides a method for sending a reference signal. FIG. 3 is a second schematic flowchart of a method for sending a reference signal according to an embodiment of the present application. In this embodiment, a first subset of root sequence index values is determined from a predefined sorted root sequence index value set, and a root sequence index value is determined for the terminal device in the first root sequence index value subset. As shown in FIG. 3, the reference signal transmission method includes:

S201. The terminal device determines the first value according to the first parameter set.

The first value is the number of root sequence index values selectable by the terminal device, and the first parameter set includes: the total number of reference signal sequences, the cyclic shift interval of the base sequence corresponding to the reference signal, and the length of the base sequence corresponding to the reference signal.

Exemplarily, the greater the number of selectable root sequence index values of the terminal device, correspondingly, the larger the set of selectable reference signal sequences, and the lower the probability of selecting the same reference signal sequence with other terminals, that is, the probability of reference signal sequence collision Lower.

Generally, the root sequence set corresponding to the first value can be shared by a group of terminal devices. The terminal device set can be all terminals in a cell or a specific combination of terminals in the cell.

Exemplarily, the first set of sequence index value subsets corresponding to different terminal devices belonging to the same cell may be the same or different.

Exemplarily, before determining the first subset of sequence index values of the terminal device in the predefined sorted set of root sequence index values, the root sequence index value in the first subset of sequence index values corresponding to the terminal device needs to be determined first The number is recorded as the first value. Exemplarily, the number of root sequence index values selectable by the cell to which the terminal device belongs may be used as the first numerical value.

Exemplarily, the terminal device determines the first value according to the first parameter set. The first parameter set includes: the total number of reference signal sequences, the cyclic shift interval of the base sequence corresponding to the reference signal, and the length of the base sequence corresponding to the reference signal.

Exemplarily, the terminal device may determine the number of reference signal sequences corresponding to a root sequence index value according to the length of the base sequence corresponding to the reference signal and the cyclic shift interval of the base sequence corresponding to the reference signal. The number of selectable root sequence index values is determined according to the total number of reference signal sequences and the number of reference signal sequences that a root sequence index value can correspond to.

Exemplarily, an offset (or cyclic shift) sequence obtained by cyclic shifting a root sequence x _q (m) of length N _ZC is as follows:

Where ((.)) Represents the cyclic shift operation of the sequence, and n is the cyclic shift interval of the base sequence. In theory, a base sequence of length N _ZC can cyclically shift out N _ZC shift sequences, but in practice, the selected cyclic shift interval is greater than n> 1. Obviously, the greater the cyclic shift interval, the root sequence The corresponding number of shift sequences is smaller.

For example, when the cyclic shift interval of the base sequence corresponding to the reference signal is 5, and the length of the base sequence corresponding to the reference signal is 31, the number of reference signal sequences that can correspond to a root sequence index value can be determined according to floor (31/5) = 6 It is 6, where floor () is the rounding down operation. When the total number of reference sequences is 36, the number of reference signal sequences that can be corresponding to a root sequence index value is 6, using ceil (36/6) = 6 to determine the required number of root sequence index values is 6, where ceil () Rounding up.

Optionally, the first parameter set further includes: a cyclic shift start value corresponding to the reference signal. Optionally, the starting value of the cyclic shift corresponding to the reference signal may be configured by the network device. The first parameter set can be sent by a system broadcast message, then the first parameter set can be shared by a terminal in a cell; the first parameter set can also be sent by user-specific resource reconfiguration information signaling (resource, reconfiguraiton, RRC), then the first The parameter set can be shared and shared by a specific terminal device;

Optionally, the first parameter set may also be pre-defined.

Exemplarily, the terminal device may determine a reference that the root sequence index value can correspond to based on the length of the base sequence corresponding to the reference signal, the cyclic shift interval of the base sequence corresponding to the reference signal, and the cyclic shift start value corresponding to the reference signal The number of signal sequences.

Exemplarily, when the cyclic shift interval of the base sequence corresponding to the reference signal is 5, the length of the base sequence corresponding to the reference signal is 31, and the start value of the cyclic shift corresponding to the reference signal is 3, then a root sequence index value is available. The value starts at 3 and ends at 30. The total number of available offset sequences is 28, and the offset interval of the base sequence is 5, then the number of offset sequences corresponding to a root sequence index value is floor (28/5) = 5, correspondingly, 36 reference signal sequences are needed, and ceil (36/5) = 8 root sequence index values are needed.

Exemplarily, the method for acquiring the length of the base sequence corresponding to the reference signal may also be sent by the network device.

Optionally, the length of the base sequence corresponding to another reference signal may be pre-defined.

Optionally, another way to obtain the length of the base sequence corresponding to the reference signal may be:

S11. The terminal device determines the number N _RE of resource units used to transmit the reference signal according to the resource mapping interval of the reference signal.

Exemplarily, the resource mapping interval of the reference signal includes comb information comb of the reference signal. Optionally, the comb information includes a comb start position and a comb interval. Figure 4 is a schematic diagram of comb information. As shown in FIG. 4, the comb interval is 2, when the starting position of the comb is 0, the reference signal is mapped in the first type of resource unit in FIG. 4; when the starting position of the comb is 1, the reference signal is mapped in In the second type of resource unit in 4.

It can be understood that, when the comb interval is 1, the resource mapping of the reference signal is a continuous mapping.

Exemplarily, when the terminal device simultaneously sends the reference signal and the data to be sent, the terminal device determines the number N _RE of resource units used to transmit the reference signal according to the resource mapping interval of the reference signal and the frequency domain resource of the data channel. Among them, the frequency domain resource of the data signal is consistent with the frequency domain resource of the reference signal. Exemplarily, when the terminal device transmits the reference signal alone, the terminal device determines the number N _RE of resource units used to transmit the reference signal according to the resource mapping interval of the reference signal and the dedicated resource for the reference signal.

S12. The terminal device determines the base sequence length N _ZC corresponding to the reference signal according to N _RE , where N _ZC is a prime number not greater than N _RE .

Exemplarily, the terminal device determines the base sequence length N _ZC corresponding to the reference signal according to N _RE . Optionally, N _ZC is a prime number not greater than N _RE . Exemplarily, N _ZC is a maximum prime number not greater than N _RE . For example, when N _RE is 36, N _ZC may be 31.

S202. The terminal device determines the first root sequence index value subset from the pre-defined sorted root sequence index value set according to the starting value of the root sequence index value and the first value.

Wherein, the first subset of root sequence index values includes consecutive first numeric root sequence index values from the starting value of the root sequence index value.

Exemplarily, when the terminal device determines the first subset of sequence index values from the set of predefined sequenced root sequence index values, the terminal device selects the roots of the predefined sequence according to the starting value of the root sequence index value and the first value The sequential first numerical root index value is taken from the sequence index value set as the first root index value subset.

For example, referring to Table 1, when the initial value of the root sequence index value is 2 and the first value is 6, the first root sequence index value subset includes {2, 3, 4, 5, 6, 7}. Among them, 2-7 is the root sequence index value in Table 2, not the serial number value. According to the sorting information of the root sequence index value {2, 3, 4, 5, 6, 7} in the corresponding predefined index value set (or the corresponding serial number, in order from small to large), the first The root sequence index value subset {5, 6, 4, 2, 3, 7}, and the PAPR value corresponding to each root sequence index value gradually increases.

S203. The terminal device determines the root sequence index value of the terminal device according to the coverage level information of the terminal device and the first root sequence index value subset.

Exemplarily, the terminal device determines the root sequence index value of the terminal device according to the coverage level information of the terminal device in the first root sequence index value subset, as in the embodiment shown in FIG. 2, the lower the coverage level of the terminal device is determined The smaller the coverage association indication value corresponding to the root sequence index value of the terminal device of.

For example, when the coverage level of the terminal device is 2, and there are two coverage levels in the cell or group where the terminal device is located, the coverage level of the terminal device is determined to be a poor coverage level, and the corresponding root sequence with a smaller PAPR needs to be determined for the terminal device Index value. For example, in the first subset of root sequence index values {5, 6, 4, 2, 3, 7}, the terminal device may select the root sequence index values of 5, 6, and 4.

S204. The terminal device generates a reference signal of the terminal device according to the root sequence index value of the terminal device.

S205. The terminal device sends a reference signal to the network device.

Exemplarily, S204 and S205 in this embodiment are the same as S102 and S103 in the embodiment shown in FIG. 2, and details are not described in this application.

In the method for sending a reference signal provided by this embodiment, the terminal device determines the first value according to the first parameter set, and the terminal device uses the starting value of the root sequence index value and the first value in a predefined sorted set of root sequence index values Determine the first root sequence index value subset, the terminal device determines the root sequence index value of the terminal device based on the terminal device's coverage level information and the first root sequence index value subset, the terminal device determines the root sequence index value of the terminal device, The reference signal of the terminal device is generated, and the terminal device sends the reference signal to the network device. In this embodiment, by selecting consecutive root sequence index values of the root sequence index value as the first root sequence index value subset of the terminal device, the terminal device can select corresponding different coverages according to the coverage level in the first root sequence index value subset The root sequence index value of the associated indication value.

Optionally, on the basis of any of the foregoing embodiments, embodiments of the present application further provide a method for sending reference signals. FIG. 5 is a third schematic flowchart of a reference signal sending method according to an embodiment of the present application. In this embodiment, the terminal device further divides the first sequence index value subset into the number of coverage levels and the second sequence index value subset according to the coverage level division information, and in the coverage level interval corresponding to the coverage level of the terminal device The corresponding second root sequence index value subset determines the root sequence index value of the terminal device. As shown in FIG. 5, the reference signal transmission method includes:

S301. The terminal device determines the first value according to the first parameter set.

S302. The terminal device determines the first root sequence index value subset from the pre-defined sorted root sequence index value set according to the starting value of the root sequence index value and the first value.

Exemplarily, S301 and S302 in this embodiment are the same as S201 and S202 in the embodiment shown in FIG. 3, and details are not described in this application.

S303. The terminal device divides the first sequence index subset into the number of coverage levels and the second sequence index subset according to the coverage level division information.

Exemplarily, the coverage level division information may be used to determine the number of coverage levels and / or coverage level intervals. Exemplarily, the coverage level division information may include N thresholds, and the corresponding number of coverage levels is N + 1, where N is a positive integer. Exemplarily, the coverage level division information may specifically be an RSRP threshold, a Geometry threshold, or an SINR threshold.

6 is a schematic diagram of determining the number of coverage levels and coverage level intervals according to the coverage level division information. In FIG. 6, the coverage level division information includes 4 RSRP thresholds as an example for schematic description. The values of RSRP1 to RSRP4 in FIG. 6 increase or decrease sequentially.

For example, when the coverage level division information indicated by the network device indicates two levels, the first sequence index subset {5, 6, 4, 2, 3, 7} can be divided into two consecutive segment sub Sets {5, 6, 4} and {2, 3, 7}. Exemplarily, when the first sequence index subset is divided into the number of coverage levels and the second sequence index subset, it may be divided evenly or unevenly.

Exemplarily, the terminal device may determine the coverage level of the terminal device according to the measurement parameter and the coverage level division information. For example, the coverage level of the terminal device is determined by determining the coverage level interval where the measurement parameter of the terminal device is located. Optionally, by comparing the measurement parameter of the terminal device with the threshold value included in the coverage level division information, the coverage level interval where the measurement parameter of the terminal device is located can be determined.

S304. The terminal device determines the root sequence index value of the terminal device according to the second root sequence index value subset corresponding to the coverage level interval corresponding to the coverage level of the terminal device.

Exemplarily, in a plurality of second root sequence index value subsets, the second root sequence index value subset corresponding to the terminal equipment may be determined according to the terminal equipment coverage level, and then the second root sequence index value value corresponding to the terminal equipment Centrally, determine the root sequence index value of the terminal device. Without loss of generality, the terminal device may randomly select a root sequence index value in the second subset of sequence index values as the root sequence index value of the final generated reference signal sequence.

For example, {5, 6, 4} is an optional root sequence index value for the first coverage level (low coverage), and {2, 3, 7} is an optional root sequence index value for the second coverage level (high coverage). When the coverage level of the terminal device is the first coverage level, the terminal device determines the root sequence index value in {5, 6, 4}. For example, the terminal device may randomly select the root sequence index value in {5, 6, 4}.

S305. The terminal device generates a reference signal of the terminal device according to the root sequence index value of the terminal device.

S306. The terminal device sends a reference signal to the network device.

Exemplarily, S305 and S306 in this embodiment are the same as S102 and S103 in the embodiment shown in FIG. 2, and details are not described in this application.

In the reference signal sending method provided in this embodiment, the terminal device further divides the first sequence index value subset into the number of coverage levels and the second sequence index value subset according to the coverage level division information, and covers A subset of the second root sequence index value corresponding to the coverage level interval corresponding to the level determines the root sequence index value of the terminal device. In this embodiment, different second-level sequence index value subsets are divided for terminal devices of different coverage levels, which facilitates the terminal device to select the root sequence index value in the corresponding second root sequence index value subset, avoiding all terminal devices directly Selecting the root sequence index value in the first subset of root sequence index values results in an unbalanced selection of root sequence index values, and the reference signal is likely to collide.

Optionally, in any of the foregoing embodiments, the base sequence corresponding to the reference signal is a ZC sequence. Exemplarily, the terminal device determines a predetermined sorted set of root sequence index values corresponding to N _ZC according to the base sequence length N _ZC corresponding to the reference signal, and a root sequence index value in the root sequence index value set corresponds to a length of N The base sequence of _ZC .

Exemplarily, the terminal device generates the reference signal of the terminal device according to the base sequence corresponding to the root sequence index value of the terminal device.

Exemplarily, the generation of the reference signal according to the base sequence corresponding to the root sequence index value may have at least the following feasible implementation manners.

The first feasible implementation method:

The terminal device uses the base sequence corresponding to the root sequence index value of the terminal device as the reference signal sequence of the terminal device, and generates the reference signal of the terminal device according to the reference signal sequence of the terminal device.

Exemplarily, the terminal device may directly use the base sequence corresponding to the root sequence index value of the terminal device as the reference signal sequence of the terminal device.

The second feasible implementation method:

The terminal equipment cyclically shifts the base sequence corresponding to the root sequence index value of the terminal equipment according to the cyclic shift interval and / or cyclic shift start value of the base sequence to obtain the reference signal sequence of the terminal equipment, according to the reference of the terminal equipment The signal sequence generates the reference signal of the terminal device.

For example, when the base sequence corresponding to a root sequence index value q is x _q (n), the available cyclic offset sequence determined by the terminal device according to the cyclic shift start value and the cyclic shift interval of the base sequence may use the following formula 3 means.

x _q ((n + n ₀ + p · n _CS )) Equation 3

Where n ₀ is the cyclic shift start value, n _CS is the cyclic shift (or offset) interval, and p is an integer that the terminal device can randomly select,

Exemplarily, by using the unexpanded ZC sequence as the reference signal sequence, the correlation between the reference signals can be ensured to be low, and the correlation between the extended ZC sequence can be avoided to be high, thereby improving the detection performance of the terminal.

Optionally, the cyclic shift interval of the base sequence can be configured by the network device.

Optionally, the starting value of the cyclic shift may be configured by the network device, or may be predefined, for example, 0.

On the basis of any of the above embodiments, after the reference signal sequence of the terminal device is determined, the reference signal sequence of the terminal device needs to be mapped into the time-domain symbol corresponding to the reference signal sequence of the terminal device to obtain the reference signal.

The following describes the mapping method in detail for the difference in the number of time-domain symbols occupied by the reference signal sequence of the terminal device.

When the resource unit used to transmit the reference signal is located in a time-domain symbol, the reference signal sequence is continuously mapped on the resource unit used to transmit the reference signal in the frequency resource corresponding to the time-domain symbol, and the frequency resource corresponding to the time-domain symbol The number of spare resource units at both ends of the middle does not differ by more than 1;

Exemplarily, FIG. 7 is a schematic diagram 1 of reference signal sequence mapping. As shown in FIG. 7, when the resource unit used to send the reference signal is located in a time domain symbol, an intermediate mapping method may be used. At this time, the reference signal sequence mapped to the intermediate N _RE N resource units in the _ZC resource units, and N _RE vacant resource unit number of free resource units do not differ by more than two sides. Exemplarily, the number of spare resource units at both ends may be ceil [(N _RE -N _ZC ) / 2] and floor [(N _RE -N _ZC ) / 2] resource units, respectively.

When the resource unit for transmitting the reference signal is located in at least two time-domain symbols, the reference signal includes at least two reference signal sub-sequences, and the at least two reference signal sub-sequences are continuously mapped in frequency resources corresponding to different time-domain symbols On the resource unit for sending reference signals;

Exemplarily, FIG. 8 is a second schematic diagram of reference signal sequence mapping. As shown in FIG. 8, when the resource unit used to transmit the reference signal is located in at least two time-domain symbols, the two-end mapping method may be used. At this time, as much as possible, each subcarrier on the frequency resource is mapped with an element of the reference signal sequence. Exemplarily, the reference signal includes at least two reference signal sub-sequences, and each reference signal sub-sequence is mapped in different time-domain symbols. Exemplarily, the two reference signal subsequences may be splitting one reference signal sequence into two reference signal subsequences, or may be copying one reference signal sequence as two reference signal subsequences.

Exemplarily, the reference signal sub-sequence is continuously mapped, and is mapped on the upper or lower end of the occupied time domain symbol. And there is at least one first reference signal sub-sequence and one second reference signal sub-sequence. The first reference signal subsequence may be mapped downward from the top of the resource unit corresponding to the time domain symbol, and the second reference signal subsequence may be mapped upward from the bottom of the resource unit corresponding to the time domain symbol.

It should be noted that the elements of the reference signal sequence in the above embodiments are all mapped to resource units that can be used to send the reference signal. A spare resource unit refers to a resource unit that does not have an element to which a reference signal sequence is mapped among resource units that can be used for sending reference signals.

Another aspect of the embodiments of the present application further provides a reference signal sending method. 9 is a fourth schematic flowchart of a method for sending a reference signal according to an embodiment of the present application. The execution subject of this method is the network device in the communication system shown in FIG. 1. As shown in FIG. 9, the reference signal transmission method includes:

S401. The network device sends the first parameter set to the terminal device.

The first parameter set includes: the total number of reference signal sequences and the cyclic shift interval of the base sequence corresponding to the reference signal.

Optionally, the first parameter set may also be pre-configured on the terminal device.

S402. The network device receives the reference signal generated by the terminal device according to the first parameter.

Optionally, the first parameter set further includes: a cyclic shift start value corresponding to the reference signal.

Optionally, the network device also sends at least one of the following to the terminal device:

An embodiment of the present application also provides a codebook generation method. In this embodiment, the terminal device also determines the codebook used to send the data. FIG. 10 is a first schematic flowchart of a codebook generation method according to an embodiment of the present application. As shown in FIG. 10, the codebook generation method includes:

S501. The terminal device obtains the coverage level information of the terminal device and the ordered codebook (codeword or signature) set.

Exemplarily, the coverage level information in this embodiment is the same as the coverage level information in any of the foregoing embodiments, and details are not described in this application.

Exemplarily, as shown in Table 3 below, a codebook set includes 6 codebooks C _i (i = 1, 2, 3, 4, 5, 6), and each codebook is a 4-ary vector consisting of 3 The elements {0, c ₀ , c ₁ } are composed, where c _{j = 0,1} is a complex number. The codebook is mainly used for symbol modulation or spreading of data channels. Different C _i will lead to different coverage association indication values of the data channel.

table 3

C ₁＝[c ₀,c ₁,0,0] C ₁ = [c ₀ , c ₁ , 0,0]
C ₂＝[c ₀,0,c ₁,0] C ₂ = [c ₀ , 0, c ₁ , 0]
C ₃＝[c ₀,0,0c ₁,] C ₃ = [c ₀ , 0,0c ₁ ,]
C ₄＝[0,c ₀,c ₁,0] C ₄ = [0, c ₀ , c ₁ , 0]
C ₅＝[0,c ₀,0,c ₁] C ₅ = [0, c ₀ , 0, c ₁ ]
C ₆＝[0,0,c ₀,c ₁] C ₆ = [0,0, c ₀ , c ₁ ]

S502. The terminal device determines the codebook subset of the terminal device according to the coverage level of the terminal device and the sorted codebook set.

Exemplarily, the terminal device divides the sorted codebook set into a number of codebook subsets of the coverage level according to the coverage level division information. The terminal device determines the codebook subset of the terminal device in multiple codebook subsets according to the coverage level of the terminal device. Exemplarily, the manner of dividing the codebook set according to the coverage level division information in this step is the same as the manner of dividing the first root sequence index value subset according to the coverage level division information in the foregoing embodiment.

S503. The terminal device determines the codebook number of the terminal device according to the reference signal sequence number and the preset mapping relationship.

Wherein, the preset mapping relationship is the mapping relationship between the reference signal sequence number and the codebook number, and the reference signal sequence number is the number of the reference signal sequence of the terminal device in the second subset of the sequence index value, which can be determined by the terminal device Preset. The codebook number is the corresponding number of the codeword in the codebook subset determined by the terminal device.

Exemplarily, as shown in Table 4 below, Table 4 includes two coverage levels, and its second sequence index subset is divided into {5,6,4} and {2,3,7}. The number of the N reference signal sequences corresponding to the set may be all 0 ～ N-1, and the codebook subsets of the two coverage levels are {C ₁ , C ₂ } and {C ₃ , C ₄ , C ₅ , C ₆ } The preset mapping relationship may be n mod 2 in Table 4, or n mod 4. When the coverage level of the terminal device is 1, the codebook number of the terminal device can be determined by the reference signal sequence number n of the terminal device (n mod 2) +1, correspondingly, when the coverage level of the terminal device is 2, The codebook number is determined by the reference signal sequence number n as (n mod 4) +3.

Table 4: Mapping between the reference sequence set and the codebook subset corresponding to the second subset of sequence index values

S504. The terminal device determines the codebook corresponding to the codebook number in the codebook subset.

The terminal determines the codebook used in the corresponding codebook subset according to the coverage level and the selected reference signal sequence number, which is used for symbol modulation or spreading of the data channel, so that users with lower coverage levels use the lower coverage association indication value. Codebooks, correspondingly, users with higher coverage levels use codebooks with higher coverage association indication values to ensure the coverage performance of the data channel of the terminal, and also reduce the probability of collisions where different terminals use the same codebook.

An embodiment of the present application also provides a codebook generation method. In this embodiment, the terminal device also determines the codebook used to send the data. FIG. 11 is a second schematic flowchart of a codebook generation method provided by an embodiment of the present application. As shown in FIG. 11, the codebook generation method includes:

S601. The terminal device obtains the coverage level information and the ordered codebook set of the terminal device.

S602. The terminal device determines a codebook subset of the terminal device according to the coverage level of the terminal device and the sorted codebook set.

S603. The terminal device determines the codebook number of the terminal device according to the root sequence index value number and the second preset mapping relationship.

Exemplarily, unlike the embodiment shown in FIG. 10, in this embodiment, the second preset mapping relationship is the mapping relationship between the index value of the root sequence and the codebook number, as shown in Table 5 below. The index numbers of R root sequences corresponding to different root sequence subsets may all be 0 to R-1.

Table 5: Mapping between the second sequence index subset and the codebook subset

S604. The terminal device determines the codebook corresponding to the codebook number in the codebook subset.

In this embodiment, the terminal device determines the codebook used for symbol modulation or spreading of the data channel, so that users with lower coverage levels use codebooks with lower coverage association indication values, and correspondingly, users with higher coverage levels The use of a codebook with a high coverage association indication value ensures the coverage performance of the terminal's data channel, and also minimizes the probability of collision between different terminals using the same codebook.

An embodiment of the present application also provides a codebook generation method. In this embodiment, the terminal device also determines the codebook used to send the data. FIG. 12 is a third schematic flowchart of a codebook generation method provided by an embodiment of the present application. As shown in FIG. 12, the codebook generation method includes:

S701. The terminal device determines the codebook number of the terminal device according to the reference signal sequence number and the third preset mapping relationship.

Exemplarily, unlike the embodiment shown in FIG. 10, in this embodiment, the third preset mapping relationship is the mapping relationship between the reference signal sequence number and the codebook number, as shown in Table 6 below.

Table 6: Mapping between the reference sequence set and the codebook set corresponding to the first subset of sequence index values

Exemplarily, the terminal device may search for a preset mapping relationship according to the determined reference signal sequence number to determine the codebook number of the terminal device of the terminal device.

S702. The terminal device determines the codebook corresponding to the codebook number in the sorted codebook set.

Exemplarily, S702 in this embodiment is the same as S504 in the embodiment shown in FIG. 10, and details are not described in this application.

Based on the foregoing embodiments, embodiments of the present application also provide a codebook generation method. In this embodiment, the terminal device also determines the codebook used to send the data. FIG. 13 is a fourth schematic flowchart of a codebook generation method according to an embodiment of the present application. As shown in Figure 13, the codebook generation method includes:

S801. The terminal device determines the codebook number of the terminal device according to the root sequence index value number and the fourth preset mapping relationship.

Exemplarily, unlike the embodiment shown in FIG. 10, in this embodiment, the fourth preset mapping relationship is the mapping relationship between the reference signal sequence number and the codebook number, as shown in Table 7 below.

Table 7: Mapping between the first subset of sequence index values and the codebook set

S802. The terminal device determines the codebook corresponding to the codebook number in the sorted codebook set.

Exemplarily, S802 in this embodiment is the same as S504 in the embodiment shown in FIG. 10, and details are not described in this application.

The present application also provides a terminal device for performing the method for transmitting a reference signal on the terminal device side in any of the embodiments shown in FIGS. 2-9 above, which has the same or similar technical features and technical effects.

14 is a schematic structural diagram of a terminal device according to Embodiment 1 of the present application. As shown in Figure 14, the terminal equipment includes:

The root sequence index value determination module 601 is used to determine the root sequence index value of the terminal device according to the coverage level information of the terminal device and the predefined sorted root sequence index value set; the lower the coverage level of the terminal device, the root of the terminal device The smaller the coverage indication value corresponding to the sequence index value;

The reference signal generation module 602 is used to generate the reference signal of the terminal device according to the root sequence index value of the terminal device;

The sending module 603 is used to send a reference signal to the network device.

Optionally, the root sequence index value determination module 601 includes:

The first value acquiring unit 6011 is configured to determine a first value according to a first parameter set, where the first value is the number of root sequence index values selectable by the terminal device, and the first parameter set includes: the total number of reference signal sequences and the corresponding The cyclic shift interval of the base sequence and the length of the base sequence corresponding to the reference signal;

The first sequence index value subset acquisition unit 6012 is used to determine the first root sequence index value subset from the predefined sorted root sequence index value set according to the root sequence index value start value and the first value, the first A subset of the sequence index value includes the consecutive first numerical value and the root sequence index value from the starting value of the root sequence index value;

The root sequence index value determination unit 6013 is configured to determine the root sequence index value of the terminal device according to the coverage level information of the terminal device and the first subset of root sequence index values.

Optionally, the root sequence index value determination unit 6013 is specifically used for,

Optionally, the terminal device also includes:

The resource unit number acquisition module 604 is used to determine the number N _RE of resource units used to transmit the reference signal according to the resource mapping interval of the reference signal;

The base sequence length acquisition module 605 is used to determine the base sequence length N _ZC corresponding to the reference signal according to N _RE , where N _ZC is a prime number not greater than N _RE .

Optionally, the terminal device also includes:

Root sequence index value set acquisition module 606, according to sequence length N _ZC base reference signal corresponding to the determined root sequence index values of the set of predefined reference signal corresponding to a base sequence corresponding to the length N _ZC sorted, root sequence index value set A root sequence index value in corresponds to a base sequence of length N _ZC , and the base sequence is a ZC sequence;

The reference signal generation module 602 is specifically configured to generate the reference signal of the terminal device according to the base sequence corresponding to the root sequence index value of the terminal device.

Optionally, the reference signal generation module 602 is specifically configured to use the base sequence corresponding to the root sequence index value of the terminal device as the reference signal sequence of the terminal device, and generate the reference signal of the terminal device according to the reference signal sequence of the terminal device; or,

Optionally, the first parameter set further includes: a cyclic shift start value corresponding to the reference signal; the terminal device further includes:

The receiving module 607 is configured to receive the cyclic shift start value corresponding to the reference signal sent by the network device.

Optionally, when the resource unit used to transmit the reference signal is located in a time domain symbol, the reference signal sequence is continuously mapped on the resource unit used to transmit the reference signal in the frequency resource corresponding to the time domain symbol, and the time domain symbol The number of spare resource units at both ends of the corresponding frequency resource differs by no more than 1;

Optionally, when the resource unit used to send the reference signal is located in at least two time-domain symbols, the reference signal includes at least two reference signal sub-sequences, and the at least two reference signal sub-sequences are respectively mapped to different time-domain symbols Of the frequency resources in the resource unit used to send the reference signal;

The present application also provides a network device for performing the method for transmitting a reference signal on the network device side in the foregoing embodiment, which has the same or similar technical features and technical effects.

15 is a schematic structural diagram of a network device according to Embodiment 1 of the present application. As shown in Figure 15, the network equipment includes:

The sending module 701 is configured to send a first parameter set to the terminal device, where the first parameter set includes: the total number of reference signal sequences and the cyclic shift interval of the base sequence corresponding to the reference signal;

The receiving module 702 is configured to receive the reference signal generated by the terminal device according to the first parameter.

Optionally, the sending module 701 is further configured to send at least one of the following to the terminal device:

The present application also provides a terminal device for performing the codebook generation method on the terminal device side in the foregoing embodiment, which has the same or similar technical features and technical effects.

16 is a schematic structural diagram of a terminal device according to Embodiment 2 of the present application. As shown in Figure 16, the terminal equipment includes:

The codebook set acquisition module 801 is used to acquire coverage level information and sorted codebook sets of terminal devices;

The codebook subset acquisition module 802 is used to determine the codebook subset of the terminal device according to the coverage level of the terminal device and the sorted codebook set;

The codebook number determination module 803 is used to determine the codebook number of the terminal device according to the reference signal sequence number and the first preset mapping relationship;

The codebook determination module 804 is used to determine the codebook corresponding to the codebook number in the codebook subset;

Referring to FIG. 16, the terminal device includes:

The codebook number determination module 803 is used to determine the codebook number of the terminal device according to the reference signal sequence number and the second preset mapping relationship;

17 is a schematic structural diagram of a terminal device provided in Embodiment 3 of the present application. As shown in Figure 17, the terminal equipment includes:

The codebook number determination module 901 is used to determine the codebook number of the terminal device according to the reference signal sequence number and the third preset mapping relationship;

The codebook determination module 902 is used to determine the codebook corresponding to the codebook number in the sorted codebook set;

Referring to FIG. 17, the terminal device includes:

The codebook number determination module 901 is used to determine the codebook number of the terminal device according to the root sequence index value number and the fourth preset mapping relationship;

Optionally, the first subset of root sequence index values is determined by the terminal device based on the starting value of the root sequence index value and the first value, in a predefined sorted set of root sequence index values, the first value is selectable by the terminal device The number of root sequence index values of, the first value is determined by the terminal device according to the first parameter set, the first parameter set includes: the total number of reference signal sequences, the cyclic shift interval of the base sequence corresponding to the reference signal and the length of the base sequence corresponding to the reference signal .

Optionally, the second root sequence index value subset is obtained by the terminal device dividing the first root sequence index value subset according to the coverage level division information.

18 is a schematic structural diagram of a terminal device according to Embodiment 4 of the present application. As shown in Figure 18, the terminal equipment includes:

The processor 1001 is configured to determine the root sequence index value of the terminal device according to the coverage level information of the terminal device and the predefined sorted root sequence index value set; The smaller the value of the coverage association indicator;

The processor 1001 is further configured to generate a reference signal of the terminal device according to the root sequence index value of the terminal device;

The transmitter 1002 is used to send a reference signal to a network device.

Optionally, the processor 1001 is specifically used for,

Optionally, the processor 1001 is further configured to determine the number N _RE of resource units used to transmit the reference signal according to the resource mapping interval of the reference signal;

Optionally, the processor 1001 is further configured to determine, according to the base sequence length N _ZC corresponding to the reference signal, the pre-defined sorted set of root sequence index values corresponding to the base sequence length N _ZC corresponding to the reference signal, and the set of root sequence index values A root sequence index value in corresponds to a base sequence of length N _ZC , and the base sequence is a ZC sequence;

Optionally, the processor 1001 is specifically configured to use the base sequence corresponding to the root sequence index value of the terminal device as the reference signal sequence of the terminal device, and generate the reference signal of the terminal device according to the reference signal sequence of the terminal device; or,

The receiver 1003 is configured to receive the cyclic shift start value corresponding to the reference signal sent by the network device.

The present application also provides a network device for performing the method for sending a reference signal on the network device side in the embodiments shown in FIGS. 2-9, and having the same or similar technical features and technical effects.

19 is a schematic structural diagram of a network device according to Embodiment 2 of the present application. As shown in Figure 19, the network equipment includes:

The transmitter 1101 is configured to send a first parameter set to the terminal device, where the first parameter set includes: the total number of reference signal sequences and the cyclic shift interval of the base sequence corresponding to the reference signal;

The receiver 1102 is configured to receive the reference signal generated by the terminal device according to the first parameter.

Optionally, the sending module 1101 is further configured to send at least one of the following to the terminal device:

Referring to FIG. 18, the terminal device includes:

The processor 1001 is configured to obtain coverage level information and ordered codebook sets of the terminal device;

Referring to FIG. 18, the terminal device includes:

The processor 1001 is configured to determine the codebook number of the terminal device according to the reference signal sequence number and the third preset mapping relationship; determine the codebook corresponding to the codebook number in the sorted codebook set;

Referring to FIG. 18, the terminal device includes:

The processor 1001 is configured to determine the codebook number of the terminal device according to the root sequence index value number and the fourth preset mapping relationship; determine the codebook corresponding to the codebook number in the sorted codebook set;

This application also provides a terminal device. 20 is a schematic structural diagram of a terminal device according to Embodiment 5 of the present application. As shown in FIG. 19, the terminal device includes a processor 1201, a memory 1202, a communication interface 1203, and a bus 1204; where,

The processor 1201, the memory 1202 and the communication interface 1203 are connected through the bus 1204 and complete mutual communication. The memory 1202 is used to store computer-executed instructions. When the device is running, the processor 1201 executes the computer-executed instructions in the memory 1202 to use The hardware resources in the device perform the steps in the reference signal sending method corresponding to FIGS. 2-9, and the steps in the codebook generating method corresponding to FIGS. 10-12.

An embodiment of the present application also provides a network device. 21 is a schematic structural diagram of a network device according to Embodiment 3 of the present application. As shown in FIG. 21, the network device includes a processor 1301, a memory 1302, a communication interface 1303, and a bus 1304; wherein, the processor 1301, the memory 1302, and the communication interface 1303 are connected through the bus 1304 to complete communication with each other, and the memory 1302 Is used to store computer-executed instructions. When the device is running, the processor 1301 executes the computer-executed instructions in the memory 1302 to use the hardware resources in the device to perform the steps in the reference signal transmission method corresponding to FIGS. 2-9, and FIGS. 10-12. The steps in the corresponding codebook generation method.

The present application also provides a communication system, including: at least one terminal device as shown in FIG. 18 and a network device as shown in FIG. 19.

This application also provides an electronic device, including: a processor, a memory, and a computer program;

The computer program is stored in the memory, and the processor runs the computer program so that the electronic device executes the reference signal transmission method in any of the embodiments shown in FIGS. 2-9 above, and in any of the embodiments shown in FIGS. 10-13 Codebook generation method.

The present application also provides a computer storage medium. The storage medium includes a computer program. The computer program is used to implement the reference signal transmission method in any of the embodiments shown in FIGS. 2-9 above, and any of the programs shown in FIGS. 10-13. A codebook generation method in an embodiment.

The present application also provides a computer program product. The computer program product includes computer program code. When the computer program code runs on a computer, the computer program product causes the computer to execute the reference signal transmission method in any of the embodiments shown in FIGS. 2-9 above. , And the codebook generation method in any of the embodiments shown in FIGS. 10-13.

The present application also provides a chip including a processor for running a computer program, so that the electronic device mounted with the chip executes the reference signal transmission method in any of the embodiments shown in FIGS. 2-9 above, and The codebook generation method in any of the embodiments shown in 10-13.

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

The processors involved in the embodiments of the present application may be general-purpose processors, digital signal processors, application specific integrated circuits, field programmable gate arrays or other programmable logic devices, discrete gates or transistor logic devices, and discrete hardware components, which may be implemented or Perform the disclosed methods, steps, and logical block diagrams in the embodiments of the present application. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied and executed by a hardware processor, or may be executed and completed by a combination of hardware and software modules in the processor.

The memory involved in the embodiments of the present application may be a non-volatile memory, such as a hard disk (HDD) or a solid-state drive (SSD), etc., or a volatile memory (volatile memory), for example Random access memory (random-access memory, RAM). The memory is any other medium that can be used to carry or store the desired program code in the form of instructions or data structure transmission and can be accessed by the computer, but is not limited thereto.

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

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

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

A person of ordinary skill in the art can understand that in various embodiments of the present application, the size of the sequence numbers of the above processes does not mean that the execution order is sequential, and the execution order of each process should be determined by its function and inherent logic, not The implementation process of the embodiments of the present application shall constitute any limitation.

In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of transmission of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a dedicated computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be from a website site, computer, server or data center Transmit to another website, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device including a server, a data center, and the like integrated with one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, Solid State Disk (SSD)) or the like.

Claims

A reference signal transmission method, which is characterized by comprising:

The terminal device determines the root sequence index value of the terminal device according to the coverage level information of the terminal device and a predefined sorted set of root sequence index values; the lower the coverage level of the terminal device, the root of the terminal device The smaller the coverage indication value corresponding to the sequence index value;

The terminal device generates a reference signal of the terminal device according to the root sequence index value of the terminal device;

The terminal device sends the reference signal to the network device.
The method according to claim 1, wherein the terminal device determines the root sequence index value of the terminal device based on the coverage level information of the terminal device and a pre-defined sorted set of root sequence index values, including :

The terminal device determines a first value according to a first parameter set, where the first value is the number of root sequence index values selectable by the terminal device, and the first parameter set includes: the total number of reference signal sequences and the reference signal correspondence The cyclic shift interval of the base sequence and the length of the base sequence corresponding to the reference signal;

The terminal device determines a first subset of root sequence index values in the predefined sorted set of root sequence index values according to the starting value of the root sequence index value and the first numerical value, the first root sequence index The subset of values includes the first root sequence index value consecutively from the starting value of the root sequence index value;

The terminal device determines the root sequence index value of the terminal device according to the coverage level information of the terminal device and the first root sequence index value subset.
The method according to claim 2, wherein the terminal device determining the root sequence index value of the terminal device based on the coverage level information of the terminal device and the first root sequence index value subset includes: :

The terminal device divides the first subset of sequence index values into a number of coverage levels and a second subset of sequence index values according to coverage level division information; the coverage level division information is used to determine the number of coverage levels and coverage Level range

The terminal device determines the root sequence index value of the terminal device according to the second root sequence index value subset corresponding to the coverage level interval corresponding to the coverage level of the terminal device.
The method according to claim 2 or 3, wherein before the terminal device determines the first value according to the first parameter set, the method further comprises:

The terminal device determines the number N RE of resource units used to transmit the reference signal according to the resource mapping interval of the reference signal;

The terminal device determines the base sequence length N ZC corresponding to the reference signal according to the N RE , where N ZC is a prime number not greater than N RE .
The method according to any one of claims 2 to 4, wherein the terminal device determines the terminal device's terminal device based on the coverage level information of the terminal device and a predefined sorted set of root sequence index values Before the root sequence index value, the method further includes:

The terminal apparatus according to the sequence length N ZC base reference signal corresponding to the determined root sequence index values of the set of predefined length N ZC sequence group corresponding to the reference signal corresponding to the ordering of the root sequence index value of a set of The root sequence index value corresponds to a base sequence of length N ZC , and the base sequence is a ZC sequence;

The terminal device generates a reference signal of the terminal device according to the root sequence index value of the terminal device, including:

The terminal device generates a reference signal of the terminal device according to the base sequence corresponding to the root sequence index value of the terminal device.
The method according to claim 5, wherein the terminal device generating the reference signal of the terminal device according to the base sequence corresponding to the root sequence index value of the terminal device includes:

The terminal device uses the base sequence corresponding to the root sequence index value of the terminal device as the reference signal sequence of the terminal device, and generates the reference signal of the terminal device according to the reference signal sequence of the terminal device; or,

The terminal device cyclically shifts the base sequence corresponding to the root sequence index value of the terminal device according to the cyclic shift interval and / or the cyclic shift start value to obtain the reference signal sequence of the terminal device, according to The reference signal sequence of the terminal device generates the reference signal of the terminal device.
The method according to any one of claims 2-6, wherein the first parameter set further comprises: a cyclic shift start value corresponding to a reference signal; the method further comprises:

The terminal device receives the cyclic shift start value corresponding to the reference signal sent by the network device.
The method according to any one of claims 1-7, wherein when the resource unit used to transmit the reference signal is located in a time domain symbol, the reference signal sequence is continuously mapped in the time domain The resource unit used to send the reference signal in the frequency resource corresponding to the symbol, and the difference in the number of spare resource units at both ends in the frequency resource corresponding to the time domain symbol does not exceed 1;

The spare resource unit is a resource unit to which the reference signal sequence is not mapped among the frequency resources used to transmit the reference signal.
The method according to any one of claims 1-7, wherein when the resource unit used to transmit the reference signal is located in at least two time-domain symbols, the reference signal includes at least two reference signals Sub-sequences, the at least two reference signal sub-sequences are successively mapped on resource units for transmitting the reference signal in frequency resources corresponding to different time-domain symbols, respectively;

There is at least one first reference signal subsequence and one second reference signal subsequence in the at least two reference signal subsequences, and the element with the smallest number in the first reference signal subsequence is mapped to the reference signal subsequence The smallest numbered resource unit in the frequency domain resource corresponding to the time domain symbol mapped by the sequence, the element with the highest number in the second reference signal subsequence is mapped to the number in the frequency domain resource corresponding to the time domain symbol mapped by the reference signal subsequence Maximum resource unit.
A reference signal transmission method, which is characterized by comprising:

The network device sends a first parameter set to the terminal device, where the first parameter set includes: the total number of reference signal sequences and the cyclic shift interval of the base sequence corresponding to the reference signal;

The network device receives the reference signal generated by the terminal device according to the first parameter.
The method according to claim 10, wherein the first parameter set further comprises: a cyclic shift start value corresponding to the reference signal.
The method of claim 10, further comprising:

The network device sends at least one of the following to the terminal device: coverage level information of the terminal device, a pre-defined sorted root sequence index value set, a root sequence index value start value, a cyclic shift start value, Covering division level information, resource mapping interval of reference signals or base sequence length N ZC corresponding to reference signals.
A codebook generation method is characterized by including:

The terminal device obtains the coverage level information of the terminal device and the ordered codebook set;

The terminal device determines the codebook subset of the terminal device according to the coverage level information of the terminal device and the sorted codebook set;

The terminal device determines the codebook number of the terminal device according to the reference signal sequence number and the first preset mapping relationship;

The terminal device determines a codebook corresponding to the codebook number in the codebook subset;

Wherein, the first preset mapping relationship is a mapping relationship between a reference signal sequence number and a codebook number, and the reference signal sequence number is a reference signal sequence of the terminal device in the second root sequence index value subset Number, the codebook number is the corresponding number of the codeword in the codebook subset determined by the terminal device.
The method according to claim 13, wherein the second root sequence index value subset is obtained by the terminal device dividing the first root sequence index value subset according to the coverage level division information, the The first sequence index value subset is determined by the terminal device based on the root sequence index value start value and the first value in a pre-defined sorted set of root sequence index values, the first value being the terminal device Selectable number of root sequence index values, the first value is determined by the terminal device according to a first parameter set, the first parameter set includes: total number of reference signal sequences, cyclic shift interval of the base sequence corresponding to the reference signal The length of the base sequence corresponding to the reference signal.
A codebook generation method is characterized by including:

The terminal device obtains the coverage level information of the terminal device and the ordered codebook set;

The terminal device determines the codebook subset of the terminal device according to the coverage level of the terminal device and the sorted codebook set;

The terminal device determines the codebook number of the terminal device according to the root sequence index value number and the second preset mapping relationship;

The terminal device determines a codebook corresponding to the codebook number in the codebook subset;

Wherein, the second preset mapping relationship is a mapping relationship between a reference signal sequence number and a codebook number, and the root sequence index value number is the root sequence index value of the terminal device in the second root sequence index The number in the value subset. The codebook number is the corresponding number of the codeword in the codebook subset determined by the terminal device.
The method according to claim 15, wherein the second root sequence index value subset is obtained by the terminal device dividing the first root sequence index value subset according to the coverage level division information, the The first sequence index value subset is determined by the terminal device based on the root sequence index value start value and the first value in a pre-defined sorted set of root sequence index values, the first value being the terminal device Selectable number of root sequence index values, the first value is determined by the terminal device according to a first parameter set, the first parameter set includes: total number of reference signal sequences, cyclic shift interval of the base sequence corresponding to the reference signal The length of the base sequence corresponding to the reference signal.
A codebook generation method is characterized by including:

The terminal device determines the codebook number of the terminal device according to the reference signal sequence number and the third preset mapping relationship;

The terminal device determines a codebook corresponding to the codebook number in the sorted codebook set;

Wherein, the third preset mapping relationship is a mapping relationship between a reference signal sequence number and a codebook number, and the reference signal sequence number is a reference signal sequence of the terminal device in the first root sequence index value subset Number, the codebook number is the codeword number in the sorted codebook set.
The method according to claim 17, wherein the subset of the first root sequence index value is indexed by the terminal device according to the start value of the root sequence index value and the first value in a pre-defined sorted root sequence index It is determined in the value set that the first value is the number of root sequence index values selectable by the terminal device. The first value is determined by the terminal device according to a first parameter set, and the first parameter set includes: reference The total number of signal sequences, the cyclic shift interval of the base sequence corresponding to the reference signal, and the length of the base sequence corresponding to the reference signal.
A codebook generation method is characterized by including:

The terminal device determines the codebook number of the terminal device according to the root sequence index value number and the fourth preset mapping relationship;

The terminal device determines a codebook corresponding to the codebook number in the sorted codebook set;

Wherein, the fourth preset mapping relationship is the mapping relationship between the root sequence index value number and the codebook number, and the root sequence index value number is the root sequence index value of the terminal device in the first root sequence index value The number in the subset. The codebook number is the codeword number in the ordered codebook set.
The method according to claim 19, wherein the subset of the first root sequence index value is indexed by the terminal device according to the starting value of the root sequence index value and the first value in a pre-defined sorted root sequence index It is determined in the value set that the first value is the number of root sequence index values selectable by the terminal device. The first value is determined by the terminal device according to a first parameter set, and the first parameter set includes: The total number of signal sequences, the cyclic shift interval of the base sequence corresponding to the reference signal, and the length of the base sequence corresponding to the reference signal.
A terminal device is characterized by comprising:

A processor, configured to determine a root sequence index value of the terminal device according to the coverage level information of the terminal device and a pre-defined sorted set of root sequence index values; the lower the coverage level of the terminal device, the terminal The smaller the coverage association indication value corresponding to the root sequence index value of the device;

The processor is further configured to generate a reference signal of the terminal device according to the root sequence index value of the terminal device;

The transmitter is configured to send the reference signal to the network device.
The terminal device according to claim 21, wherein the processor is specifically configured to:

A first value is determined according to a first parameter set, where the first value is the number of root sequence index values selectable by the terminal device, and the first parameter set includes: the total number of reference signal sequences, the base sequence corresponding to the reference signal Cyclic shift interval and base sequence length corresponding to the reference signal;

According to the starting value of the root sequence index value and the first numerical value, a first subset of the root sequence index values is determined in the predefined sorted root sequence index value set, the first root sequence index value subset includes Consecutively the first numerical root sequence index value from the starting value of the root sequence index value;

The root sequence index value of the terminal device is determined according to the coverage level information of the terminal device and the first root sequence index value subset.
The terminal device according to claim 22, wherein the processor is specifically configured to:

According to the coverage level division information, divide the first sequence index subset into the coverage level number and the second sequence index subset; the coverage level division information is used to determine the coverage level number and coverage level interval;

The root sequence index value of the terminal device is determined according to the second root sequence index value subset corresponding to the coverage level interval corresponding to the coverage level of the terminal device.
The terminal device according to claim 22 or 23, wherein the processor is further configured to determine the number N RE of resource units used to transmit the reference signal according to the resource mapping interval of the reference signal;

According to the N RE , determine a base sequence length N ZC corresponding to the reference signal, where N ZC is a prime number not greater than N RE .
The terminal device according to any one of claims 22 to 24, wherein the processor is further configured to determine the base sequence length N corresponding to the reference signal according to the base sequence length N ZC corresponding to the reference signal root ZC sequence index corresponding to a predefined ordered set of values, a root sequence index of the root sequence index value corresponding to a value set in a base of length N ZC sequence, a ZC sequence of the base sequence;

The reference signal of the terminal device is generated according to the base sequence corresponding to the root sequence index value of the terminal device.
The terminal device according to claim 25, wherein the processor is specifically configured to use the base sequence corresponding to the root sequence index value of the terminal device as the reference signal sequence of the terminal device, according to the The reference signal sequence of the terminal device generates the reference signal of the terminal device; or,

Based on the cyclic shift interval and / or the cyclic shift start value, cyclically shift the base sequence corresponding to the root sequence index value of the terminal device to obtain the reference signal sequence of the terminal device, according to the terminal device ’s The reference signal sequence generates a reference signal of the terminal device.
The terminal device according to any one of claims 22 to 26, wherein the first parameter set further includes: a cyclic shift start value corresponding to a reference signal; and the terminal device further includes:

The receiver is configured to receive a cyclic shift start value corresponding to the reference signal sent by the network device.
The terminal device according to any one of claims 21 to 27, wherein when the resource unit used to transmit the reference signal is located in a time domain symbol, the reference signal sequence is continuously mapped to the time The resource unit used to send the reference signal in the frequency resource corresponding to the domain symbol, and the number of spare resource units at both ends in the frequency resource corresponding to the time domain symbol does not differ by more than 1;

The spare resource unit is a resource unit to which the reference signal sequence is not mapped among the frequency resources used to transmit the reference signal.
The terminal device according to any one of claims 21-27, wherein when the resource unit used to transmit the reference signal is located in at least two time-domain symbols, the reference signal includes at least two references A signal sub-sequence, the at least two reference signal sub-sequences are successively mapped on resource units for transmitting the reference signal in frequency resources corresponding to different time-domain symbols, respectively;

There is at least one first reference signal subsequence and one second reference signal subsequence in the at least two reference signal subsequences, and the element with the smallest number in the first reference signal subsequence is mapped to the reference signal subsequence The smallest numbered resource unit in the frequency domain resource corresponding to the time domain symbol mapped by the sequence, the element with the highest number in the second reference signal subsequence is mapped to the number in the frequency domain resource corresponding to the time domain symbol mapped by the reference signal subsequence Maximum resource unit.
A network device, characterized in that it includes:

The transmitter is configured to send a first parameter set to the terminal device, where the first parameter set includes: the total number of reference signal sequences and the cyclic shift interval of the base sequence corresponding to the reference signal;

The receiver is configured to receive the reference signal generated by the terminal device according to the first parameter.
The network device according to claim 30, wherein the first parameter set further includes: a cyclic shift start value corresponding to the reference signal.
The network device according to claim 30, wherein the transmitter is further configured to send at least one of the following to the terminal device: coverage level information of the terminal device, a predefined sorted root The sequence index value set, the root sequence index value start value, the cyclic shift start value, the coverage division level information, the resource mapping interval of the reference signal, or the base sequence length N ZC corresponding to the reference signal.
A terminal device is characterized by comprising:

A processor, configured to obtain coverage level information and a sorted codebook set of the terminal device;

Determine the codebook subset of the terminal device according to the coverage level of the terminal device and the sorted codebook set;

Determine the codebook number of the terminal device according to the reference signal sequence number and the first preset mapping relationship;

Determine the codebook corresponding to the codebook number in the codebook subset;

Wherein, the first preset mapping relationship is a mapping relationship between a reference signal sequence number and a codebook number, and the reference signal sequence number is a reference signal sequence of the terminal device in the second root sequence index value subset Number, the codebook number is the corresponding number of the codeword in the codebook subset determined by the terminal device.
The terminal device according to claim 33, wherein the second root sequence index value subset is obtained by the terminal device dividing the first root sequence index value subset according to the coverage level division information, so The first subset of root sequence index values is determined by the terminal device according to the starting value of the root sequence index value and the first value in a pre-defined sorted set of root sequence index values, the first value being the terminal The number of root sequence index values selectable by the device. The first value is determined by the terminal device according to a first parameter set, where the first parameter set includes: the total number of reference signal sequences and the cyclic shift of the base sequence corresponding to the reference signal The length of the base sequence corresponding to the interval and the reference signal.
A terminal device is characterized by comprising:

A processor, configured to obtain coverage level information and a sorted codebook set of the terminal device;

Determine the codebook subset of the terminal device according to the coverage level of the terminal device and the sorted codebook set;

Determine the codebook number of the terminal device according to the root sequence index value number and the second preset mapping relationship;

Determine the codebook corresponding to the codebook number in the codebook subset;

Wherein, the second preset mapping relationship is the mapping relationship between the reference signal sequence number and the codebook number, and the root sequence index value number is the root sequence index value of the terminal device in the second root sequence index value In the centralized number, the codebook number is the corresponding number of the codeword in the codebook subset determined by the terminal device.
The terminal device according to claim 35, wherein the second root sequence index value subset is obtained by the terminal device dividing the first root sequence index value subset according to the coverage level division information, so The first subset of root sequence index values is determined by the terminal device according to the starting value of the root sequence index value and the first value in a pre-defined sorted set of root sequence index values, the first value being the terminal The number of root sequence index values selectable by the device. The first value is determined by the terminal device according to a first parameter set, where the first parameter set includes: the total number of reference signal sequences and the cyclic shift of the base sequence corresponding to the reference signal The length of the base sequence corresponding to the interval and the reference signal.
A terminal device is characterized by comprising:

A processor, configured to determine the codebook number of the terminal device according to the reference signal sequence number and the third preset mapping relationship; determine the codebook corresponding to the codebook number in the sorted codebook set;

Wherein, the third preset mapping relationship is a mapping relationship between a reference signal sequence number and a codebook number, and the reference signal sequence number is a reference signal sequence of the terminal device in the first root sequence index value subset Number, the codebook number is the codeword number in the sorted codebook set.
The terminal device according to claim 37, wherein the subset of the first root sequence index value is determined by the terminal device according to the starting value of the root sequence index value and the first value, in a pre-defined sorted root sequence It is determined in the index value set that the first value is the number of root sequence index values selectable by the terminal device. The first value is determined by the terminal device according to a first parameter set, and the first parameter set includes: The total number of reference signal sequences, the cyclic shift interval of the base sequence corresponding to the reference signal, and the length of the base sequence corresponding to the reference signal.
A terminal device is characterized by comprising:

A processor, configured to determine the codebook number of the terminal device according to the root sequence index value number and the fourth preset mapping relationship; determine the codebook corresponding to the codebook number in the sorted codebook set;

Wherein, the fourth preset mapping relationship is the mapping relationship between the root sequence index value number and the codebook number, and the root sequence index value number is the root sequence index value of the terminal device in the first root sequence index value The number in the subset. The codebook number is the codeword number in the ordered codebook set.
The terminal device according to claim 39, wherein the subset of the first root sequence index value is determined by the terminal device according to the start value of the root sequence index value and the first value, in a pre-defined sorted root sequence It is determined in the index value set that the first value is the number of root sequence index values selectable by the terminal device. The first value is determined by the terminal device according to a first parameter set, and the first parameter set includes: The total number of reference signal sequences, the cyclic shift interval of the base sequence corresponding to the reference signal, and the length of the base sequence corresponding to the reference signal.
A terminal device is characterized by comprising:

A root sequence index value determining module, configured to determine the root sequence index value of the terminal device according to the coverage level information of the terminal device and a predefined sorted set of root sequence index values; the lower the coverage level of the terminal device The smaller the coverage association indication value corresponding to the root sequence index value of the terminal device;

A reference signal generating module, configured to generate a reference signal of the terminal device according to the root sequence index value of the terminal device;

The sending module is configured to send the reference signal to the network device.
The terminal device according to claim 41, wherein the root sequence index value determination module includes:

A first value acquiring unit, configured to determine a first value according to a first parameter set, where the first value is the number of root sequence index values selectable by the terminal device, and the first parameter set includes: the total number of reference signal sequences 3. The cyclic shift interval of the base sequence corresponding to the reference signal and the length of the base sequence corresponding to the reference signal;

The first sequence index value subset acquisition unit is used to determine the first root sequence index value subgroup in the predefined sorted root sequence index value set according to the starting value of the root sequence index value and the first value Set, the first subset of root sequence index values includes the first number of consecutive root sequence index values from the starting value of the root sequence index value;

The root sequence index value determining unit is configured to determine the root sequence index value of the terminal device according to the coverage level information of the terminal device and the first root sequence index value subset.
The terminal device according to claim 42, wherein the root sequence index value determining unit is specifically configured to divide the first root sequence index value subset into the number of coverage levels according to the coverage level division information A subset of two sequence index values; the coverage level division information is used to determine the number of coverage levels and the coverage level interval; the second root sequence index value corresponding to the coverage level interval corresponding to the coverage level of the terminal device is determined The root sequence index value of the terminal device.
The terminal device according to claim 42 or 43, wherein the terminal device further comprises:

A resource unit quantity acquisition module, configured to determine the number N RE of resource units used to transmit the reference signal according to the resource mapping interval of the reference signal;

The base sequence length acquisition module is used to determine the base sequence length N ZC corresponding to the reference signal according to the N RE , where the N ZC is a prime number not greater than N RE .
The terminal device according to any one of claims 42 to 44, wherein the terminal device further comprises:

A set of root sequence index value obtaining module, according to sequence length N ZC base reference signal corresponding to the determined root sequence index values of the set of predefined length N ZC sequence group corresponding to the reference signal corresponding to the ordering of the root sequence A root sequence index value in the index value set corresponds to a base sequence of length N ZC , and the base sequence is a ZC sequence;

The reference signal generation module is specifically configured to generate the reference signal of the terminal device according to the base sequence corresponding to the root sequence index value of the terminal device.
The terminal device according to claim 45, wherein

The reference signal generating module is specifically configured to use the base sequence corresponding to the root sequence index value of the terminal device as the reference signal sequence of the terminal device, and generate the terminal device's reference signal sequence based on the reference signal sequence of the terminal device Reference signal; or, based on the cyclic shift interval and / or the cyclic shift start value, cyclically shift the base sequence corresponding to the root sequence index value of the terminal device to obtain the reference signal sequence of the terminal device, according to The reference signal sequence of the terminal device generates the reference signal of the terminal device.
The terminal device according to any one of claims 42 to 46, wherein the first parameter set further includes: a cyclic shift start value corresponding to a reference signal; the terminal device further includes:

The receiving module is used for a cyclic shift starting value corresponding to the reference signal sent by the network device.
The terminal device according to any one of claims 41 to 47, wherein when the resource unit for transmitting the reference signal is located in a time domain symbol, the reference signal sequence is continuously mapped in the time domain The resource unit used to send the reference signal in the frequency resource corresponding to the symbol, and the difference in the number of spare resource units at both ends in the frequency resource corresponding to the time domain symbol does not exceed 1;

The spare resource unit is a resource unit to which the reference signal sequence is not mapped among the frequency resources used to transmit the reference signal.
The terminal device according to any one of claims 41 to 47, wherein when the resource unit for transmitting the reference signal is located in at least two time-domain symbols, the reference signal includes at least two reference signals Sub-sequences, the at least two reference signal sub-sequences are successively mapped on resource units for transmitting the reference signal in frequency resources corresponding to different time-domain symbols, respectively;

There is at least one first reference signal subsequence and one second reference signal subsequence in the at least two reference signal subsequences, and the element with the smallest number in the first reference signal subsequence is mapped to the reference signal subsequence The smallest numbered resource unit in the frequency domain resource corresponding to the time domain symbol mapped by the sequence, the element with the highest number in the second reference signal subsequence is mapped to the number in the frequency domain resource corresponding to the time domain symbol mapped by the reference signal subsequence Maximum resource unit.
A network device, characterized in that it includes:

A sending module, configured to send a first parameter set to the terminal device, where the first parameter set includes: the total number of reference signal sequences and the cyclic shift interval of the base sequence corresponding to the reference signal;

The receiving module is configured to receive the reference signal generated by the terminal device according to the first parameter.
The network device according to claim 50, wherein the first parameter set further includes: a cyclic shift start value corresponding to the reference signal.
The network device according to claim 50, wherein the sending module is further configured to send at least one of the following to the terminal device: coverage level information of the terminal device, a predefined sorted root The sequence index value set, the root sequence index value start value, the cyclic shift start value, the coverage division level information, the resource mapping interval of the reference signal, or the base sequence length N ZC corresponding to the reference signal.
A terminal device is characterized by comprising:

A codebook set acquisition module, for acquiring coverage level information of the terminal device and a sorted codebook set;

A codebook subset acquisition module, configured to determine the codebook subset of the terminal device according to the coverage level of the terminal device and the sorted codebook set;

A codebook number determining module, configured to determine the codebook number of the terminal device according to the reference signal sequence number and the first preset mapping relationship;

A codebook determining module, configured to determine a codebook corresponding to the codebook number in the codebook subset;

Wherein, the first preset mapping relationship is a mapping relationship between a reference signal sequence number and a codebook number, and the reference signal sequence number is a reference signal sequence of the terminal device in the second root sequence index value subset Number, the codebook number is the corresponding number of the codeword in the codebook subset determined by the terminal device.
The terminal device according to claim 53, wherein the second root sequence index value subset is obtained by the terminal device dividing the first root sequence index value subset according to the coverage level division information, so The first subset of root sequence index values is determined by the terminal device according to the starting value of the root sequence index value and the first value in a pre-defined sorted set of root sequence index values, the first value being the terminal The number of root sequence index values selectable by the device. The first value is determined by the terminal device according to a first parameter set, where the first parameter set includes: the total number of reference signal sequences and the cyclic shift of the base sequence corresponding to the reference signal The length of the base sequence corresponding to the interval and the reference signal.
A terminal device is characterized by comprising:

A codebook set acquisition module, for acquiring coverage level information of the terminal device and a sorted codebook set;

A codebook subset acquisition module, configured to determine the codebook subset of the terminal device according to the coverage level of the terminal device and the sorted codebook set;

A codebook number determining module, configured to determine the codebook number of the terminal device according to the reference signal sequence number and the second preset mapping relationship;

A codebook determining module, configured to determine a codebook corresponding to the codebook number in the codebook subset;

Wherein, the second preset mapping relationship is the mapping relationship between the reference signal sequence number and the codebook number, and the root sequence index value number is the root sequence index value of the terminal device in the second root sequence index value In the centralized number, the codebook number is the corresponding number of the codeword in the codebook subset determined by the terminal device.
The terminal device according to claim 55, wherein the second root sequence index value subset is obtained by the terminal device dividing the first root sequence index value subset according to the coverage level division information, so The first subset of root sequence index values is determined by the terminal device according to the starting value of the root sequence index value and the first value in a pre-defined sorted set of root sequence index values, the first value being the terminal The number of root sequence index values selectable by the device. The first value is determined by the terminal device according to a first parameter set, where the first parameter set includes: the total number of reference signal sequences and the cyclic shift of the base sequence corresponding to the reference signal The length of the base sequence corresponding to the interval and the reference signal.
A terminal device is characterized by comprising:

A codebook number determining module, configured to determine the codebook number of the terminal device according to the reference signal sequence number and the third preset mapping relationship;

A codebook determining module, configured to determine a codebook corresponding to the codebook number in the sorted codebook set;

Wherein, the third preset mapping relationship is a mapping relationship between a reference signal sequence number and a codebook number, and the reference signal sequence number is a reference signal sequence of the terminal device in the first root sequence index value subset Number, the codebook number is the codeword number in the sorted codebook set.
The terminal device according to claim 57, wherein the subset of the first root sequence index value is determined by the terminal device according to the start value of the root sequence index value and the first value, in a pre-defined sorted root sequence It is determined in the index value set that the first value is the number of root sequence index values selectable by the terminal device. The first value is determined by the terminal device according to a first parameter set, and the first parameter set includes: The total number of reference signal sequences, the cyclic shift interval of the base sequence corresponding to the reference signal, and the length of the base sequence corresponding to the reference signal.
A terminal device is characterized by comprising:

A codebook number determining module, configured to determine the codebook number of the terminal device according to the root sequence index value number and the fourth preset mapping relationship;

A codebook determining module, configured to determine a codebook corresponding to the codebook number in the sorted codebook set;

Wherein, the fourth preset mapping relationship is the mapping relationship between the root sequence index value number and the codebook number, and the root sequence index value number is the root sequence index value of the terminal device in the first root sequence index value The number in the subset. The codebook number is the codeword number in the ordered codebook set.
The terminal device according to claim 59, wherein the subset of the first root sequence index value is determined by the terminal device according to the start value of the root sequence index value and the first value, in a pre-defined sorted root sequence It is determined in the index value set that the first value is the number of root sequence index values selectable by the terminal device. The first value is determined by the terminal device according to a first parameter set, and the first parameter set includes: The total number of reference signal sequences, the cyclic shift interval of the base sequence corresponding to the reference signal, and the length of the base sequence corresponding to the reference signal.
A communication system, comprising: the terminal device according to any one of claims 21-29, 33-49, 53-60 and the network device according to any one of claims 30-32, 50-52 .
An electronic device, characterized by comprising: a processor, a memory and a computer program;

The computer program is stored in the memory, and the processor runs the computer program so that the electronic device executes the reference signal transmission method according to any one of claims 1-12 and claim 13- The codebook generating method according to any one of 20.
A computer storage medium, characterized in that the storage medium includes a computer program for implementing the reference signal transmission method according to any one of claims 1-12 and according to claims 13-20 The method for generating a codebook according to any one of the items.
A chip, characterized by comprising a processor for running a computer program, so that an electronic device mounted with the chip executes the reference signal transmission method according to any one of claims 1-12 and The codebook generating method according to any one of claims 13-20.
A computer program product, characterized in that the computer program product includes computer program code, and when the computer program code runs on a computer, causes the computer to execute the reference signal transmission according to any one of claims 1-12 The method and the codebook generating method according to any one of claims 13-20.