WO2017075789A1

WO2017075789A1 - Device, method, and system for transmitting reference signal

Info

Publication number: WO2017075789A1
Application number: PCT/CN2015/093924
Authority: WO
Inventors: 黎超; 赵振山
Original assignee: 华为技术有限公司
Priority date: 2015-11-05
Filing date: 2015-11-05
Publication date: 2017-05-11
Also published as: CN111884963A; CN111884963B; CN108141425B; CN108141425A

Abstract

The present application relates to the technical field of wireless communications, and in particular, to a device, method, and system for transmitting a reference signal, used for ensuring normal communications between communication devices as far as possible when a frequency offset exists between the communication devices. The present application provides a transmitting device, comprising: a processing module, used for generating a reference signal, the reference signal being a first type of reference signal; and a transmitting module, used for transmitting the reference signal generated by the processing module. In the time domain, in each subframe occupied by the first type of reference signal, the first type of reference signal occupies at least five symbols; there are two symbols in the at least five symbols and an inter-symbol interval between the two existing symbols is not larger than two symbols. The described design for the first type of reference signal can ensure that a receiving device estimates, in the case of a large frequency offset between devices communicating with each other, the frequency offset by using the reference signal designed above and makes a corresponding correction, thereby ensuring normal communications between the devices.

Description

Transmission device, method and system for reference signal

Technical field

The present application relates to the field of wireless communications technologies, and in particular, to a transmission device, method, and system for a reference signal.

Background technique

In a wireless communication system, a reference signal (RS) is transmitted from a transmitting device of a reference signal to a receiving device of a reference signal, and can be used for channel estimation, signal demodulation, automatic gain control (AGC), and signal quality measurement. The positioning device, the channel detecting, the positioning, and the like, the receiving device of the reference signal knows in advance the reference signal to be received, so as to achieve the purpose of signal processing such as channel estimation of the receiving device.

In a wireless communication system, the premise of normal communication between devices is that these devices are in a synchronized state. However, various reasons may cause accurate synchronization between devices.

For example, if two vehicles communicate with each other, if the two vehicles are synchronized to two base stations, and no synchronization is achieved between the two base stations, there may be a frequency deviation between the two vehicles for communication. For example, the communication frequency between the two is 6 GHz, and the frequency deviation between the two vehicles may be as high as 3 to 7 kHz, resulting in failure to communicate properly between them.

Summary of the invention

In view of this, the present application provides a transmission device, method and system for reference signals for ensuring normal communication between communication devices when there is a frequency deviation between communication devices.

In a first aspect, the application provides a reference signal sending device, including:

a processing module, configured to generate a reference signal, where the reference signal is a first type of reference signal;

a sending module, configured to send the reference signal generated by the processing module;

In the time domain, in each subframe occupied by the first type of reference signal, the first type of reference signal occupies at least five symbols, and two symbols are present in the at least five symbols. The inter-symbol spacing of the two symbols present is no more than two symbols.

In a second aspect, the present application provides a receiving device for a reference signal, including:

a receiving module, configured to receive a reference signal;

a processing module, configured to perform signal processing on the reference signal received by the receiving module;

In the time domain, in each subframe occupied by the first type of reference signal, the first type of reference signal occupies at least five symbols, and two symbols in the at least five symbols are present. The inter-symbol spacing of the two symbols is no more than two symbols.

In a third aspect, the application provides a method for sending a reference signal, including:

Generating a reference signal, the reference signal being a first type of reference signal;

Transmitting the generated reference signal;

In a fourth aspect, the application provides a method for receiving a reference signal, including:

Receiving a reference signal, the reference signal being a first type of reference signal;

Signal processing the received reference signal;

In a fifth aspect, the application provides a wireless communication system, including:

a sending device, configured to generate a reference signal, and send the generated reference signal;

a receiving device, configured to receive the reference signal sent by the sending device, and perform signal processing on the received reference signal;

The reference signal is a first type of reference signal;

In any of the above aspects, in order to ensure normal communication between communication devices having large frequency deviations, the reference signals transmitted between the communication devices satisfy the following conditions:

In the time domain, the reference signal occupies at least five symbols in each occupied subframe, and there are two symbols in the at least five symbols, and the intersymbol spacing between the two symbols is not more than two symbols.

The reference signal occupies at least five symbols in each occupied subframe, which can ensure that the receiving device of the reference signal can obtain sufficient reference signal resources for frequency offset estimation, and can also ensure high-speed movement and fast channel change in the communication device. In the case where more reference signals can be acquired per unit time, the result of channel estimation based on the reference signal is more accurate.

Wherein, there are two symbols in the at least five symbols, and the interval between the symbols of the two symbols is not more than two symbols, in order to ensure that a large frequency deviation value can be correctly estimated. The larger the interval between the two symbols including the reference signal, the smaller the frequency deviation value that the receiving device of the reference signal can accurately estimate.

Therefore, the above design of the reference signal can ensure that the frequency deviation value between the devices communicating with each other is large, and the receiving device estimates the frequency deviation through the reference signal of the above design and corrects accordingly, thereby ensuring the between devices. Normal communication.

With reference to the first aspect, the third aspect, or the fifth aspect, in a first possible implementation, the transmitting device of the reference signal is synchronized with the synchronization source according to the sending device of the reference signal before generating the reference signal The type and/or the moving speed of the transmitting device of the reference signal determines that the reference signal is the first type of reference signal.

In this possible implementation, the type of the reference signal may be determined according to the type of the synchronization source of the transmitting device and/or the moving speed of the transmitting device, and the type of the reference signal may be flexibly set.

In combination with the first possible implementation manner described above, in a second possible implementation manner,

And if the type of the synchronization source to which the transmitting device of the reference signal is synchronized is a synchronization source whose synchronization precision is lower than the precision threshold, or the moving speed of the transmitting device of the reference signal is higher than the moving speed threshold, the transmitting device of the reference signal determines The reference signal is the first type of reference signal.

In the possible implementation manner, when the synchronization source synchronization of the transmitting device is low, or the moving speed of the transmitting device is high, the reference signal may be determined to be the first type reference signal, because the first type reference The signal has a large time domain density in the time domain, and the receiving device can estimate the frequency deviation value according to the first type of reference signal, so that the first type of reference signal can improve the receiving performance of the receiving device.

With reference to any of the foregoing aspects, and any possible implementation of any of the aspects, in a third possible implementation manner,

The first type of reference signal occupies at least two symbols in each time slot of the subframe.

It ensures that the receiving device can correctly estimate the large frequency deviation value. The larger the interval between the two symbols including the reference signal, the smaller the frequency deviation value that the receiving device of the reference signal can accurately estimate.

With reference to any of the above aspects, and any possible implementation of any of the aspects, in a fourth possible implementation,

In the frequency domain, in each resource unit occupied by the first type of reference signal, the reference signal occupies a plurality of discontinuous subcarriers.

In each resource unit occupied by the reference signal, the reference signal occupies a plurality of discontinuous subcarriers, which saves physical resources occupied by the reference signal and improves data transmission efficiency in the frequency domain.

With reference to any of the foregoing aspects, and any possible implementation of any of the aspects, in a fifth possible implementation manner,

In the frequency domain, in each resource unit occupied by the first type of reference signal, the first type of reference signal occupies at least three subcarriers.

The reference signal occupies at least 3 subcarriers in one resource unit, and the selection of the value takes into account both the reference signal density requirement in the time domain and the performance requirement of the channel estimation.

In combination with any of the foregoing aspects, and any possible implementation of any of the foregoing, in a sixth possible implementation, in a time domain, in each subframe occupied by the first type of reference signal The number of symbols occupied by the first reference signal is less than the number of symbols in the subframe that can be used to transmit data.

With reference to any of the foregoing aspects, and any possible implementation of any of the foregoing, in a seventh possible implementation, in a time domain, in each subframe occupied by the first type of reference signal In each time slot, the reference signal occupies adjacent symbols.

As mentioned earlier, the greater the interval between two symbols containing the reference signal, the reception of the reference signal The smaller the frequency deviation value that the device can accurately estimate, therefore, in each time slot in each subframe occupied by the reference signal, the reference signal occupies a plurality of adjacent symbols, and the receiving device can ensure the time slot of each time slot. Estimated performance of frequency deviation values.

In combination with the foregoing seventh possible implementation manner, in an eighth possible implementation manner, the first type of reference signal is used in each time slot in each subframe occupied by the first type of reference signal Each of the two sets of symbols is occupied, and each set of symbols includes a plurality of adjacent symbols.

This ensures the performance of the receiving device in estimating the frequency offset value in each time slot. And it can ensure that the maximum frequency deviation value in any one time slot, and the communication device moves at a high speed, even if the signal to noise ratio is low, the channel estimation and the frequency deviation value estimation performance can be better, and the reference signal is occupied. The more the number of symbols, the stronger the ability of the receiving device to suppress noise when performing channel estimation, and the stronger the ability to estimate the frequency offset value.

In combination with any of the above aspects, and any one of the first to sixth possible implementations of any of the aspects, in a ninth possible implementation,

If the subframe occupied by the first type of reference signal is a normal CP subframe, the symbols occupied by the first type of reference signal in one slot of the occupied subframe include:

Symbol 0, symbol 1, symbol 4, symbol 5, or

Symbol 0, symbol 1, symbol 3, symbol 4, or

Symbol 1, symbol 2, symbol 4, symbol 5, or

Symbol 1, symbol 2, symbol 5, symbol 6;

Symbol 0, symbol 1, symbol 4, symbol 5, or

Symbol 0, symbol 1, symbol 3, symbol 4, or

Symbol 1, symbol 2, symbol 4, symbol 5, or

Symbol 0, symbol 2, symbol 3, symbol 5.

In combination with any of the above aspects, and any one of the possible implementations of any of the aspects, in a tenth possible implementation,

The subframe occupied by the first type of reference signal includes: a synchronization subframe and/or a non-synchronization subframe; the synchronization subframe includes a synchronization signal, and the synchronization subframe does not include a synchronization signal.

In combination with any of the above aspects, and any one of the possible implementations of any of the aspects, in an eleventh possible implementation manner,

The transmitting device of the reference signal and the receiving device of the reference signal are both terminal devices; or

The sending device of the reference signal is a terminal device, and the receiving device of the reference signal is a network device;

The transmitting device of the reference signal is a network device, and the receiving device of the reference signal is a terminal device; or

The transmitting device of the reference signal and the receiving device of the reference signal are both network devices;

In conjunction with the foregoing eleventh possible implementation manner, in a twelfth possible implementation, the network device includes a base station, where the terminal device includes a user equipment UE or a roadside unit RSU.

In combination with any of the above aspects, and any one of the possible implementations of any of the aspects, in a thirteenth possible implementation manner,

In each subframe occupied by the first type of reference signal, the last symbol is an empty symbol GAP.

With reference to any of the above aspects, and any possible implementation of any of the aspects, in a fourteenth possible implementation manner,

The first type of reference signal is a reference signal transmitted by the same antenna port.

In a sixth aspect, the application provides a sending device for power indication information, including:

a processing module, configured to acquire a first transmit power value of the first signal;

a sending module, configured to send first power indication information to the receiving device of the first signal when the first transmit power value acquired by the processing module is greater than a transmit power threshold, where the first power indication information is used Instructions:

The first transmit power value is greater than the transmit power threshold; or

a power deviation value between the first transmit power value and a second transmit power value of the second signal; or

a power deviation between the first transmit power value and the second transmit power value; or

The first transmit power value;

The first signal is used to carry data in a symbol that does not include a reference signal, and the second signal is the reference signal in a symbol including the reference signal in a subframe in which the first signal is located; or

The first signal is for carrying data in a symbol including the reference signal, and the second signal is the reference signal in the symbol.

In a seventh aspect, the application provides a receiving device for power indication information, including:

a receiving module, configured to receive first power indication information that is sent by the sending device of the first signal, where the first power indication information is used to indicate that: the first transmit power value of the first signal is greater than the transmit power threshold; or a power deviation value between the first transmit power value and a second transmit power value of the second signal; or a power offset between the first transmit power value and the second transmit power value; or the a transmit power value;

a processing module, configured to determine, according to the first power indication information, that there is a power deviation between the first transmit power value and the second transmit power value of the second signal;

Determining the power deviation value, and demodulating data in the first signal or data in a subframe in which the first signal is located according to the determined power deviation value;

The first signal is used to carry data in a symbol that does not include a reference signal, and the second signal is the reference signal in a symbol that includes the reference signal in a subframe in which the first signal is located; or

In an eighth aspect, the application provides a method for sending power indication information, including:

Obtaining a first transmit power value of the first signal;

If the obtained first transmit power value is greater than the transmit power threshold, send the first power indication information to the receiving device of the first signal, where the first power indication information is used to indicate:

The first transmit power value is greater than the transmit power threshold; or

The first transmit power value;

In a ninth aspect, the application provides a method for receiving power indication information, including:

a first power indication information that is sent by the sending device that receives the first signal, where the first power indication information is used to indicate that: the first transmit power value of the first signal is greater than the transmit power threshold; or the first transmit a power deviation value between the power value and a second transmission power value of the second signal; or a power deviation between the first transmission power value and the second transmission power value; or the first transmission power value;

Determining, according to the first power indication information, that there is a power deviation between the first transmit power value and the second transmit power value of the second signal;

In a tenth aspect, the application provides a wireless communication system, including:

The sending device is configured to: when the first transmit power value of the first signal is greater than the transmit power threshold, send the first power indication information to the receiving device, where the first power indication information is used to indicate that the first transmit power value is greater than a transmit power threshold; or a power offset value between the first transmit power value and a second transmit power value of the second signal; or the first transmit power value and the second transmit There is a power deviation between the power values; or the first transmit power value;

The receiving device is configured to receive the first power indication information sent by the sending device, and determine, according to the first power indication information, the first transmit power value and a second transmit power value of the second signal There is a power deviation between the power deviation, and determining the power deviation value, and demodulating the data in the first signal or the data in the subframe in which the first signal is located according to the determined power deviation value;

In any of the above sixth to tenth aspects, the problem that the Peak to Average Power Ratio (PAPR) of the reference signal is generally higher than the PAPR of the data, the transmitting device will transmit data to be transmitted. When the transmitting power value is too high, the receiving device is notified. When the receiving device knows the situation, the corresponding processing is performed when demodulating the data to ensure the performance of the data demodulation.

With reference to any one of the sixth aspect to the tenth aspect, in a first possible implementation, the sending device of the first signal, when the first transmit power value is not greater than the transmit power threshold, The receiving device of the signal sends the second power indication information, where the second power indication information is used to indicate:

The first transmit power value is not greater than the transmit power threshold; or

There is no power deviation between the first transmit power value and the second transmit power value; or

The first transmit power value.

With reference to any of the sixth aspect to the tenth aspect, and the first possible implementation of any aspect, in a second possible implementation manner,

The transmitting device or the receiving device of the first signal determines the power deviation value according to at least one of the following information:

Mapping the reference signal to a mapping manner on a physical resource;

a modulation mode of data in a subframe in which the reference signal is located;

a multi-carrier mode of data in a subframe in which the reference signal is located;

System bandwidth

The bandwidth occupied by the data in the subframe in which the reference signal is located.

In an eleventh aspect, the application provides a transmission power adjustment apparatus, including:

a power value obtaining module, configured to acquire a first transmit power value of the first signal;

The first signal is used to carry data in a symbol that does not include a reference signal, and the second signal is the reference signal in a symbol including the reference signal in a subframe in which the first signal is located; or the a signal for carrying data in a symbol including the reference signal, the second signal being the reference signal in the symbol;

a power adjustment module, configured to: when the first transmit power value acquired by the power value acquisition module is greater than a transmit power threshold, perform power adjustment: reduce a transmit power of the first signal by a power adjustment amount, and The transmit power of the second signal decreases the power adjustment amount or keeps the transmit power of the second signal unchanged.

In a twelfth aspect, the present application provides a method for adjusting a transmit power, including:

Obtaining a first transmit power value of the first signal;

The first signal is used to carry data in a symbol including the reference signal, and the second signal is the reference signal in the symbol;

If the obtained first transmit power value is greater than the transmit power threshold, performing power adjustment: reducing a transmit power of the first signal by a power adjustment amount, and reducing a transmit power of the second signal by the The power adjustment amount or the transmission power of the second signal is kept constant.

In the eleventh and twelfth aspects of the present application, for the problem that the PAPR of the reference signal is generally higher than the PAPR of the data, the transmitting device acquires the transmit power value of the data to be transmitted, and if the acquired power value is too high, Perform transmit power adjustment to avoid transmitter transmit power saturation, from The data demodulation performance of the receiving device is guaranteed.

In combination with the eleventh aspect or the twelfth aspect, in a first possible implementation manner,

The transmitting device determines the power adjustment amount according to at least one of the following information before performing power adjustment:

a mapping manner of the reference signal to the physical resource, a modulation mode of the data in the subframe where the reference signal is located, a multi-carrier mode of the data in the subframe where the reference signal is located, a system bandwidth, and a subframe where the reference signal is located The bandwidth occupied by the data.

In a thirteenth aspect, the application provides a reference signal sending device, including:

a processing module, configured to determine, according to a type of the synchronization source to which the sending device is synchronized and/or a moving speed of the transmitting device of the reference signal, the reference signal is the first type reference signal or the second type reference signal And generating the reference signal;

The first type of reference signal occupies more symbols in one subframe than the second type of reference signal occupies in one subframe.

In a fourteenth aspect, the present application provides a receiving device for a reference signal,

a processing module, configured to determine a type of the reference signal sent by a sending device of the reference signal, where the type of the reference signal includes: a first type of reference signal or a second type of reference signal;

a receiving module, configured to receive the reference signal according to the determined type of the reference signal;

The processing module is further configured to: perform signal processing on the reference signal received by the receiving module;

In a fifteenth aspect, the application provides a method for transmitting a reference signal, including:

Determining, according to a type of the synchronization source to which the transmitting device of the reference signal is synchronized and/or a moving speed of the transmitting device of the reference signal, the reference signal is a first type of reference signal or a second type of reference signal;

Generating the reference signal;

Transmitting the generated reference signal;

In a sixteenth aspect, the present application provides a method for receiving a reference signal,

Determining a type of the reference signal sent by a transmitting device of the reference signal, the type of the reference signal comprising: a first type of reference signal or a second type of reference signal;

Receiving the reference signal according to the determined type of the reference signal;

Performing signal processing on the received reference signal;

In a seventeenth aspect, the application provides a wireless communication system, including:

a sending device, configured to determine, according to a type of the synchronization source to which the sending device is synchronized, and/or a moving speed of the sending device, a reference signal to be sent as a first type reference signal or a second type reference signal, to generate the Reference a signal and transmitting the generated reference signal;

a receiving device, configured to determine a type of the reference signal, and receive the reference signal according to the determined type of the reference signal, and perform signal processing on the received reference signal;

In conjunction with any of the thirteenth aspect to the fifteenth aspect, in the first possible implementation, the processing module is specifically configured to:

If the type of the synchronization source to which the transmitting device of the reference signal is synchronized is a synchronization source whose synchronization precision is lower than the precision threshold, or the moving speed of the transmitting device of the reference signal is higher than the moving speed threshold, determining that the reference signal is The first type of reference signal;

If the type of the synchronization source to which the transmitting device of the reference signal is synchronized is a synchronization source whose synchronization accuracy is not lower than the precision threshold, and the moving speed of the transmitting device of the reference signal is not higher than the moving speed threshold, then Determining the reference signal as the second type of reference signal.

In the possible implementation manner, when the synchronization source of the transmitting device synchronizes with low precision, or the moving speed of the transmitting device is high, the reference signal may be determined to be the first type of reference signal, because the first type of reference signal has a time domain. The time domain density is large, and the receiving device can estimate the frequency deviation value according to the first type of reference signal, so that the first type of reference signal can improve the receiving performance of the receiving device.

DRAWINGS

1 is a schematic diagram of a subframe including a DeModulation Reference Signal (DMRS) symbol in a current Long Term Evolution (LTE) system;

2 is a schematic diagram of transmission power saturation;

3A is a schematic diagram of an architecture of a wireless communication system to which the present application is applied;

3B is a schematic diagram of another architecture of a wireless communication system to which the present application is applied;

3C is a schematic diagram of an architecture of a vehicle networking system to which the present application is applied;

4 is a schematic structural diagram of a vehicle networking system including a synchronization source;

FIG. 5 is a schematic structural diagram of a wireless communication system according to Embodiment 1 of the present application;

6 is a schematic diagram of an optional process for a transmitting device to generate and transmit a reference signal according to Embodiment 1 of the present application;

7 is a schematic diagram of an optional process for a receiving device to receive and process a reference signal according to Embodiment 1 of the present application;

8A to FIG. 8P are schematic diagrams showing an optional mapping manner of a reference signal according to Embodiment 2 of the present application;

9A-9D are schematic diagrams of a reference signal alternative mapping manner provided by Embodiment 3 of the present application;

10 is a flowchart of an interaction process between a sending device and a receiving device according to Embodiment 4 of the present application;

FIG. 11 is a flowchart of a processing procedure of a sending device according to Embodiment 5 of the present application;

FIG. 12 is a flowchart of an interaction process between a sending device and a receiving device according to Embodiment 6 of the present application;

FIG. 13 is a schematic structural diagram of a first reference signal sending apparatus according to Embodiment 7 of the present application;

FIG. 14 is a schematic structural diagram of a second reference signal sending apparatus according to Embodiment 8 of the present application;

15 is a schematic structural diagram of a first reference signal receiving apparatus according to Embodiment 9 of the present application;

16 is a schematic structural diagram of a first reference signal receiving apparatus according to Embodiment 10 of the present application;

FIG. 17 is a schematic structural diagram of a first device for transmitting power indication information according to Embodiment 11 of the present application;

FIG. 18 is a schematic structural diagram of a second device for transmitting power indication information according to Embodiment 12 of the present application;

FIG. 19 is a schematic structural diagram of a first receiving apparatus for power indication information according to Embodiment 13 of the present application;

20 is a schematic structural diagram of a second receiving apparatus for power indication information according to Embodiment 14 of the present application;

FIG. 21 is a schematic structural diagram of a first transmit power adjustment apparatus according to Embodiment 15 of the present application;

FIG. 22 is a schematic structural diagram of a second transmission power adjustment apparatus according to Embodiment 16 of the present application;

23 is a schematic structural diagram of a third reference signal transmitting apparatus according to Embodiment 17 of the present application;

24 is a schematic structural diagram of a third reference signal receiving apparatus according to Embodiment 18 of the present application;

25 is a flowchart of a first method for transmitting a reference signal according to Embodiment 19 of the present application;

26 is a flowchart of a first reference signal receiving method according to Embodiment 20 of the present application;

FIG. 27 is a flowchart of a method for transmitting power indication information according to Embodiment 21 of the present application;

28 is a flowchart of a method for receiving power indication information according to Embodiment 22 of the present application;

29 is a flowchart of a method for adjusting a transmit power provided in Embodiment 23 of the present application;

30 is a flowchart of a second method for transmitting a reference signal according to Embodiment 24 of the present application;

FIG. 31 is a flowchart of a method for adjusting transmit power provided by Embodiment 25 of the present application;

32 is a flowchart of a second method for transmitting a reference signal according to Embodiment 26 of the present application;

FIG. 33 is a flowchart of a second method for receiving a reference signal according to Embodiment 27 of the present application.

detailed description

For a better understanding of the above objects, aspects and advantages of the present application, a detailed description is provided below. The detailed description sets forth various embodiments of the devices and/or methods in the <RTIgt; In these block diagrams, flowcharts, and/or examples, one or more functions and/or operations are included. Those skilled in the art will appreciate that the various functions and/or operations within the block diagrams, flowcharts or examples can be implemented individually or collectively by various hardware, software, firmware, or by any of hardware, software and firmware. Combined implementation.

In the present application, on the one hand, in order to ensure normal communication between communication devices with large frequency deviations, the reference signals transmitted between the communication devices satisfy the following conditions:

In the present application, on the other hand, since the Peak to Average Power Ratio (PAPR) of the reference signal is generally higher than the PAPR of the data, when the transmission power of the transmitter is saturated, for example, the maximum saturated power is assumed to be 23 dBm. The transmit power of the reference signal and data is 23dBm. Since the PAPR of the reference signal is 3dB higher than the data, the effective transmit power of the reference signal is actually Only 23-3=20dBm. That is, the effective transmit power on the actual reference signal is lower than the effective power on the data by a predefined value, and the higher PAPR value of the reference signal reduces the efficiency of the radio frequency device, resulting in the power of the reference signal being lower than the power of the data. Amplitude modulation, the receiving device cannot correctly reflect the channel characteristics due to the received reference signal of the truncated peak, and the channel estimation result of the receiving device is inaccurate, resulting in data demodulation error.

For the problem that the Peak to Average Power Ratio (PAPR) of the reference signal is usually higher than the PAPR of the data, a solution including the following two solutions is provided in the present application:

Solution 1. The transmitting device obtains the transmit power value of the data to be sent. If the obtained power value is too high, the receiving device is notified that the power value is too high. When the receiving device knows the situation, the corresponding data is demodulated. Processing to ensure data demodulation performance.

Solution 2: The transmitting device obtains the transmit power value of the data to be sent. If the obtained power value is too high, the transmit power is adjusted to avoid the transmitter transmit power saturation, thereby ensuring the data demodulation performance of the receiving device.

In this application, in another aspect, a transmission scheme of a reference signal is provided, and the type of the reference signal can be flexibly determined according to the synchronization source type to which the transmitting device is synchronized and/or the moving speed of the transmitting device.

In the following, the basic concepts involved in the present application are introduced for ease of understanding.

For the sake of understanding, the Long Term Evolution (LTE) system is taken as an example. However, this does not mean that the application is only applicable to the LTE system. In fact, any reference signal can be used for reference. Signal transmission scheme to solve the above mentioned problems and achieve the above mentioned effects.

First, the data transmission in the LTE system

In the LTE system, the downlink transmission, that is, the access network device such as the base station transmits to the UE, is based on the Orthogonal Frequency Division Multiplexing Access (OFDMA) multiple access method; the uplink transmission, that is, the UE direction The access network device transmission is based on Single Carrier–Frequency Division Multiplexing Access (Single Carrier–Frequency Division Multiplexing Access, SC-FDMA) Multiple Access Mode.

For downlink transmission, the time-frequency resources are divided into OFDM symbols in the time domain dimension and subcarriers in the frequency domain dimension; for uplink transmission, the time-frequency resources are divided into SC-FDM symbols in the frequency domain dimension. In this application, the symbol may be an OFDM symbol or an SC-FDM symbol, or a symbol in other multiple access modes, which is not limited in this application.

In the LTE system, the smallest resource granularity is called a Resource Element (RE), that is, a time-frequency symbol representing a time domain symbol in the time domain and a sub-carrier on the frequency domain.

Generally, the basic time unit of the access network device scheduling is one subframe, and one subframe includes multiple time domain symbols. Alternatively, for some scenarios where the transmission delay is required to be reduced, the basic time unit of the access network device scheduling may be one or more time domain symbols. The duration of the occupation of a subframe is a predefined length, which is the basic unit of occupying resources in the time domain in one transmission. The LTE system is used as an example. Currently, the duration of one subframe is 1 ms. However, the duration of the subframe is not limited to the duration specified by the current LTE protocol. It may be other duration values, such as 0.5 ms, 0.2 ms. , 0.1ms. In a multi-carrier system, the duration of one subframe is usually related to the sub-carrier spacing. The larger the sub-carrier spacing, the shorter the duration of the subframe occupation. In summary, in the present application, a subframe refers to a basic unit occupying resources in the time domain in one transmission, and its length in the time domain is predefined.

In an LTE system, one subframe is divided into two slots, and one slot includes several symbols.

In the LTE system, a subframe may be divided into a synchronization subframe and a non-synchronization subframe, where the synchronization subframe includes a synchronization signal, and the synchronization subframe does not include the synchronization signal.

In an LTE system, signals (including data and/or reference signals) can be transmitted through one or more antenna ports. The antenna port is a logical port used for transmitting communication between the device and the receiving device. For signals transmitted by the same antenna port, the receiving device can consider that the signal is transmitted from the same physical antenna when receiving the signal.

Usually, one antenna port corresponds to a certain physical antenna. However, in actual system implementation, one antenna port can also correspond to multiple different physical antennas having the same transmission characteristics. For example, the antenna antennas have the same antenna pattern, for example. : The physical distance between these physical antennas is very close. In summary, the communication links of these different physical antennas of the transmitting device to the receiving device can be considered as the communication link of the same physical antenna to the receiving device on the receiving device side.

The LTE system supports two types of duplex modes: Frequency Division Multiplexing (FDD) and Time Duplexing Division (TDD). For the LTE system adopting the FDD duplex mode, referred to as the FDD LTE system, the downlink transmission and the uplink transmission use different carriers. For the LTE system of the TDD duplex mode, for the TDD LTE system, the uplink transmission and the downlink transmission use different times of the same carrier, and specifically include a downlink subframe, an uplink subframe, and a special subframe on one carrier.

The special subframe includes three parts: a Downlink Pilot Time Slot (DwPTS), a Guard Period (GP), and an Uplink Pilot Time Slot (UpPTS). Compensation for device conversion time and propagation delay for downstream to upstream. In addition, downlink data can be transmitted in the DwPTS, but the PUSCH cannot be transmitted in the UpPTS. Therefore, from this perspective, the special subframe can be regarded as a downlink subframe.

In the present application, the relevant symbols refer to the respective time domain symbols in a specific carrier modulation mode. In the embodiment of the present invention, the symbols may be Orthogonal Frequency Division Multiplexing (OFDM) symbols or a single symbol. The carrier frequency division multiplexing (SC-FDMA symbol, or other symbols in the multiple access mode) is not limited in this embodiment of the present invention. If it is a frequency division multi-carrier modulation mode, each symbol is used. A plurality of subcarriers are included; if it is a code division multicarrier modulation scheme, a channel of a plurality of code divisions may be included in each symbol.

Second, PRB, subcarrier spacing and symbol length

In the LTE system, when data transmission is performed, the uplink and downlink time-frequency resources are grouped into PRBs, and are scheduled and allocated as physical resource units. In the current LTE system, one PRB contains 12 consecutive subcarriers in the frequency domain. In the current LTE system, the subcarrier spacing is 15 kHz, that is, the interval between the center frequency points of two adjacent subcarriers.

Third, the reference signal

As described above, the receiving device can perform channel estimation, signal demodulation, AGC, signal quality measurement, positioning, and channel sounding, positioning, and the like according to the received reference signal.

However, due to limited data transmission resources, when the data transmission resource is occupied by the reference signal, it cannot be used to transmit data, which will reduce the data transmission efficiency. Therefore, when designing, the wireless communication system controls the resources occupied by the reference signal, and minimizes the occupation of the reference signal under the premise of ensuring the communication quality, thereby reducing the overhead of the reference signal in the system resources, thereby improving the data transmission efficiency. .

Taking Demodulation Reference Signal (DMRS) as an example, in the current LTE system, the receiving device demodulates the received data according to the received DMRS. Currently, there is one DMRS symbol in every 0.5 ms slot, such as the symbol Sym4 in FIG. 1, and the DMRS occupies consecutive subcarriers in the DMRS symbol. In Figure 1, a Cyclic Prefix (CP) is added in front of each symbol to eliminate Inter Symbol Interference (ISI). Sym0 to Sym6 indicate symbols 0 to 6 in a slot, and shaded Sym4 indicates a symbol used as a DMRS.

The reference signals specified by the current protocol, such as the DMRS shown in FIG. 1, cannot meet the requirements of normal communication between the transmitting device and the receiving device in some wireless communication scenarios.

For example, in the scenario where the communication device moves at a high speed, the relative movement speed between the transmitting device and the receiving device is large, and the channel has fast fading, and in FIG. 1, only one DMRS symbol exists in each 0.5 ms slot, then The receiving device cannot acquire more reference signals per unit time for accurate channel estimation. Since the density of the DMRS symbol in the time domain is not large enough, the channel estimation result of the receiving device in the high speed mobile scene is inaccurate.

Therefore, in the present application, the reference signal specified by the current protocol is redesigned, for example, to increase the time domain density, refer to the reference signals shown in FIG. 8A to FIG. 8P and FIG. 9A to FIG. 9D to satisfy the high-speed moving scene. The requirements for channel estimation.

These reference signals may be referred to as "enhanced reference signals" or "first type reference signals"; and the reference signals specified by the current protocol are referred to as "ordinary reference signals" or "second type reference signals" ". These reference signals occupy more symbols in one subframe than the reference signal specified by the current protocol.

Optionally, in the frequency domain, these reference signals may occupy continuous or non-contiguous subcarriers, if With non-contiguous subcarriers, other subcarriers that are not occupied by the reference signal can be used to transmit data, thereby ensuring data transmission efficiency.

In addition, when there is a large frequency deviation between communication devices, the receiving device needs to accurately estimate the frequency deviation value for correct reception. Using a reference signal such as that shown in FIG. 1, the receiving device cannot accurately estimate a large frequency deviation. value.

Therefore, in the present application, the first type of reference signal may further satisfy that: in one subframe, the reference signal occupies at least four symbols, and at least two symbols of the four symbols, the inter-symbol spacing of the two symbols is not More than two symbols, so as to meet the requirements of the receiving device to accurately estimate the large frequency deviation value.

In the present application, the reference signal may be various reference signals such as DMRS.

Fourth, CP

Currently, there are two types of CPs in the LTE system, and the CP length has three values.

The CP type is divided into a normal CP and an extended CP.

Taking the system bandwidth of 20 MHz as an example, when a normal CP is used, the first symbol of each time slot, as shown by Sym0 in FIG. 1 , is 160, and the corresponding occupied time is about 5.2 microseconds, in a 1 ms subframe. The other symbols occupy 144 samples, and the corresponding occupation time is about 4.7 microseconds. When a normal CP is used, there are currently 14 symbols in one subframe in the LTE system. When an extended CP is used, the CP length of each symbol is the same as 512 samples, and the corresponding occupied duration is about 16.7 microseconds. In the current LTE system, there are 12 symbols in a subframe of an extended CP.

5. The relationship between the interval between the symbols at which the reference signal is located and the frequency deviation value that the receiving device can estimate.

Through a large number of simulations and experiments, it is found that the larger the interval between two symbols including the reference signal, the smaller the frequency deviation value that the receiving device of the reference signal can accurately estimate.

For example, in an existing LTE system based on multi-carrier modulation, if the subcarrier spacing on each symbol is Δf and the two symbols including the reference signal are adjacent to each other, the receiving device according to the two neighbors The reference signal in the symbol can estimate the maximum frequency deviation value as Δf;

If the interval between two symbols containing the reference signal is 2 symbols (there are two symbols in between And only one symbol), the frequency deviation value that the receiving device can estimate based on the reference signals in the two symbols is a maximum Δf/2;

If the interval between two symbols including the reference signal is 3 symbols (there are two symbols in between two symbols), the frequency deviation value that the receiving device can estimate based on the reference signals in the two symbols is Maximum Δf/3.

For example, Δf=15 kHz value. If the frequency deviation value is 7k, the frequency deviation value cannot be estimated by the interval between the two symbols including the reference signal of three or more. When the interval between two symbols including the reference signal is 3 symbols, only the frequency deviation of 5 kHz can be estimated, and the larger the interval, the smaller the frequency deviation value that can be estimated.

Sixth, PAPR

The PAPR of the reference signal is higher than the data. Therefore, if the transmit power of the transmitter enters the saturation region on the transmitting device side, the higher PAPR value generated by the reference signal will affect the power amplifier efficiency of the RF device, thus causing the reference signal. The actual effective transmit power is reduced, and the data transmit power after the RF device is higher than the actual effective transmit power of the reference signal.

Referring to FIG. 2, the saturation values of signal A and signal B are the same, such as Pmax. When the transmission powers of signal A and signal B are both Pmax, since the PAPR of signal B is higher, this higher PAPR value corresponds to P_down. The power reduction of dB. The meaning is: if the signal A and the signal B have the same transmission power and reach the saturation value, then the first and the signal B have the transmission power values of Pmax. However, the actual effective transmit power value of the first transmitted signal is Pmax, and the effective transmit power value of the signal B is Pmax-P_down due to the influence of the PAPR.

That is:

If Pt1<=Pmax-P_down, and Pt2<=Pmax-P_down, then when Pt1=Pt2, there is no offset value of the transmit power, and Pt1, Pt2 are the transmit power value of the signal A and the transmit power value of the signal B, respectively;

If Pmax-P_down<Pt1<Pmax, Pmax-P_down<Pt2<Pmax, then signal B The transmit power is Pmax, and its effective transmit power is Pmax-P_down, and the transmit power value of signal A is Pt1. At this time, the transmit power deviation between signal A and signal B is Pt1-Pmax+P_down, which will be a The value related to the transmit power.

If Pt1>Pmax, Pt2>Pmax, the deviation value between the transmission power value of the signal A and the transmission power value of the signal B is a fixed value P_down.

The receiving device does not know whether the transmitting power of the transmitting device has entered the saturated region, and when it enters the saturated region, when it enters the saturated region. When the transmitted data adopts amplitude modulation, such as 16 Quadrature Amplitude Modulation (QAM), 64QAM, 128QAM, 256QAM, etc., the receiving device will make an error when performing data demodulation because the constellation is finally estimated. The point is multiplied by an unknown amplitude value that will "stretch" or "compress" the constellation. Taking 16QAM as an example, if the signal is compressed, the receiving device may not be able to identify the positions of the 16 possible constellation points corresponding to different amplitude values after being compressed, thereby generating a demodulation error.

The specific analysis is as follows:

If the transmit power of the transmitter of the transmitting device enters the saturation region, the transmit power is ΔdB smaller than the data transmit power due to the larger PAPR of the reference signal.

Assuming that the reference signal sent by the transmitter of the transmitting device is Xs and the frequency domain channel response of the channel is H, the reference signal received by the receiver of the receiving device can be expressed as:

Ys=As*H*Xs;

Wherein, As=sqrt(Ps), that is, the opening of the reference signal transmission power value Ps;

The receiving device can obtain the channel estimation value by channel estimation as Hest=As*H;

It is assumed that the channel characteristics of the channel for transmitting the reference signal are the same as the channel for transmitting the data, and correspondingly, the data received by the receiving device is:

Yd=Ad*H*Xd;

Where Xd is the signal of the data sent by the transmitter of the transmitting device, and Ad=sqrt(Pd) is the opening of the transmit power value Pd of the data;

The estimated value of the data can be obtained by the equalization of the receiver of the receiving device:

Xest=(Ad*H/Hest)*Xd=(Ad/As)*Xd=a*Xd (Equation 1)

Pd and Ps are the effective transmit power of the transmit signal transmitted by the transmitter of the transmitting device after passing through the radio frequency (RF) device, and the ratio is a=Ad/As, and the value of a is a = 10^(Δ/20).

Therefore, there is a fixed ratio between the estimated data of the receiving device and the amplitude of the data actually transmitted by the transmitting device.

For example, Δ=3dB, that is, the corresponding a=sqrt(2)=1.4, that is, the transmission power of the reference signal is half of the transmission power of the data, and the amplitude of the reference signal is 0.71 times the data amplitude.

For the receiving device, if the value of a is not known, when the data adopts a modulation method with amplitude, such as ASK, QAM modulation, etc., the receiving device may undergo demodulation and decoding errors.

6. Architecture, terminal, and access network equipment of the wireless communication system to which the present application is applicable

The application can be applied to the architecture of the wireless communication system of the terminal device-access network device shown in FIG. 3A, wherein the reference signal can be sent by the terminal device and received by the access network device; or can be sent by the access network device and received by the terminal.

The present application is also applicable to the architecture of the wireless communication system of the terminal device-terminal device shown in FIG. 3B, such as a device-to-device (D2D) system, in which one terminal device transmits a reference signal, and the like. The terminal device receives the reference signal, performs channel estimation and the like according to the received reference signal.

The application can also be used in the vehicle networking system shown in FIG. 3C, wherein the reference signal transmission manner between the terminal devices is similar to the transmission mode in the D2D system described above, and details are not described herein again. The reference signal may also be transmitted between a Road Side Unit (RSU) and a terminal device, for example, the RSU sends a reference signal, the terminal device receives the reference signal, or the terminal device sends a reference signal, and the RSU receives the reference signal; The reference signal may also be transmitted between the RSU and the base station, for example, the RSU transmits the reference signal, the base station receives the reference signal, or the base station transmits the reference signal, and the RSU receives the reference signal. Here, both the RSU and the base station can be regarded as access network devices, and in addition, the RSU can also be regarded as a terminal device.

It should be noted that when the present application is applied to a vehicle networking system, the terminal device may be an in-vehicle device. The RSU can communicate with an in-vehicle device and/or a base station that can communicate with the in-vehicle device and/or the RSU. The in-vehicle device moves with the vehicle at a high speed, and has a relatively large moving speed when the two in-vehicle devices move relative to each other. The communication between the above-mentioned in-vehicle device, RSU and base station can use the spectrum of the cellular link, or the intelligent traffic spectrum near 5.9 GHz can also be used.

Figure 4 illustrates a vehicle networking system including a synchronization source. As shown in FIG. 4, the vehicle networking system includes:

a plurality of in-vehicle devices (terminal device 1, terminal device 2, terminal device 3, and terminal device 4), which can communicate with each other, or can be communication between vehicles;

Multiple base stations (base station 1 and base station 2);

A plurality of satellite synchronization sources, such as a Global Navigation Satellite System (GNSS), including a satellite synchronization source 1 and a satellite synchronization source 2, and the plurality of satellite synchronization sources may be satellites of different countries and different standards.

In the car network system shown in FIG. 4, the terminal device 1, the terminal device 2, the terminal device 3, and the terminal device 4 can be synchronized to different types of synchronization sources, including: base station, GNSS, and GNSS equivalent synchronization. source. If different terminal devices are synchronized to different synchronization sources, such as different base stations, and these base stations are synchronized to different synchronization sources, there may be a large frequency offset value between the terminal devices. For example, when the terminal device 1 synchronizes to the base station 1 and the terminal device 2 synchronizes to the base station 2, and the base station 1 and the base station 2 do not perform synchronization, the frequency deviation value when the terminal device 1 and the terminal device 2 directly communicate with each other may be the largest. Up to 7 kHz.

Furthermore, the terminal device in the present application may be a wireless terminal, which may be a device that provides voice and/or data connectivity to the user, a handheld device with wireless connectivity, or other processing device that is connected to the wireless modem. The wireless terminal can communicate with one or more core networks via a radio access network (eg, RAN, Radio Access Network), which can be a mobile terminal, such as a mobile phone (or "cellular" phone) and with a mobile terminal The computers, for example, can be portable, pocket-sized, handheld, computer-integrated or in-vehicle mobile devices that exchange language and/or data with the wireless access network. For example, Personal Communication Service (PCS), cordless phones, Session Initiation Protocol (SIP) phones, wireless Local loop (WLL, Wireless Local Loop) station, personal digital assistant (PDA, Personal Digital Assistant) and other equipment. A wireless terminal may also be called a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, or an access point. Remote Terminal, Access Terminal, User Terminal, User Agent, User Device, or User Equipment.

The access network device provided by the present application may include a base station, or a radio resource management device for controlling the base station, or a base station and a radio resource management device for controlling the base station; the access network device may be a macro station or a small station, It can be the aforementioned RSU.

7. The communication system of the wireless communication system to which the present application is applied

The communication systems of various wireless communication systems provided by the present application include, but are not limited to, Global System of Mobile communication (GSM), Code Division Multiple Access (CDMA) IS-95, and code division. Code Division Multiple Access (CDMA) 2000, Time Division-Synchronous Code Division Multiple Access (TD-SCDMA), Wideband Code Division Multiple Access (WCDMA), Time Division Duplex - Long Term Evolution-Advanced (LTE-advanced), Long Term Evolution-Advanced (Long Term Evolution-Advanced, Long Term Evolution-Advanced, Long Term Evolution-Advanced, Long Term Evolution-Advanced, Long Term Evolution-Advanced (LTE-advanced) ), Personal Handy-phone System (PHS), Wireless Fidelity (WiFi) as defined by the 802.11 series of protocols, Worldwide Interoperability for Microwave Access (WiMAX), and future evolution Various wireless communication systems.

In fact, any reference signal transmission scheme provided by the present application can be adopted for any wireless communication system that transmits a reference signal to enable the receiving device to correctly receive data.

Eight, other instructions

Additionally, the terms "system" and "network" are used interchangeably herein. The term "and/or" in this context is merely an association that describes an associated object, indicating that there can be three relationships, for example For example, A and/or B may indicate that A exists separately, and A and B exist simultaneously, and B cases exist alone. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.

The basic concepts involved in the present application have been described above. For ease of understanding, the various embodiments of the present application and the accompanying drawings are listed in Table 1 below.

Table 1

[Embodiment 1]

As shown in FIG. 5, the wireless communication system provided in Embodiment 1 includes: a transmitting device 501 for reference signals and a receiving device 502 for reference signals. For the sake of brevity, the transmitting device 501 of the reference signal is hereinafter referred to as "sending device 501". The receiving device 502 of the reference signal is referred to as a "receiving device 502."

The sending device 501 is configured to determine a reference signal, and send the determined reference signal.

The receiving device 502 is configured to receive the reference signal and process the received reference signal, for example, performing channel estimation, signal demodulation, AGC, radio measurement, and channel detection according to the received reference signal.

FIG. 6 shows an optional process by which the transmitting device 501 generates and transmits a reference signal.

As shown in FIG. 6, the process may include the following steps:

S601: The sending device 501 generates a reference signal sequence.

S602: The sending device 501 generates data symbols to be sent, where the data symbols are to be sent. a constellation symbol generated after the encoded data packet to be transmitted is modulated;

S603: The sending device 501 determines to map the reference signal sequence to the physical resource;

S604: The sending device 501 maps the reference signal and the generated data to be sent according to the reference signal sequence to the parameter of the physical resource, and then performs multi-carrier modulation to increase the guard interval and the like to form a data subframe to be transmitted.

S605: The transmitting device 501 sends the formed data subframe.

FIG. 7 illustrates an optional process by which receiving device 502 receives a reference signal.

As shown in FIG. 7, the process may include the following steps:

S711: The receiving device 502 generates a local reference signal sequence.

S712: The receiving device 502 determines a mapping mode parameter used when mapping the reference signal sequence to the physical resource;

S713: The receiving device 502 performs signal processing on the received reference signal according to the local reference signal sequence generated by the determined mapping manner.

There are many ways to process signals, including: performing channel estimation on the received reference signal to obtain channel quality information in the bandwidth of the reference signal, and/or performing data detection on the received reference signal and the data to be received. To get the data to be received.

In the present application, the reference signal may be any of the aforementioned reference signals for channel estimation, signal demodulation, automatic gain control (AGC), signal quality measurement, positioning, and channel sounding, positioning, and the like. For example: DMRS, reference signals for AGC, etc.

In the present application, a reference signal sequence is used to generate a reference signal in one subframe, one symbol in the sequence corresponding to one of the symbols occupied by the reference signal in one subframe.

The reference signal transmission scheme and the reference signal reception scheme in the first embodiment can be applied to the following embodiments.

The reference signal transmission and reception scheme provided by the present application is described above through the first embodiment. In the following, through the second embodiment and the third embodiment, various alternative implementations in which the reference signal is mapped to the subframe are introduced. The second embodiment provides an optional mapping manner in which the reference signal is mapped to the non-synchronized subframe. For the various optional mapping manners, refer to FIG. 8A to FIG. 8P. The third embodiment provides the reference signal mapping. For the optional mapping mode of the synchronization subframe, various alternative mapping modes can be referred to FIG. 9A to FIG. 9D.

The sending device 501 can map the reference signal into the non-synchronized subframe according to one of the mapping modes provided in the second embodiment or the third embodiment, and the receiving device 502 can receive the same mapping manner as the sending device 501. The reference signal is obtained in the asynchronous sub-frame.

In the second embodiment and the third embodiment, the reference signal may be the foregoing first type of reference signal, and is applicable to a scene with a high-speed moving scene and/or a large frequency offset value.

Optionally, in each subframe occupied by the reference signal, the reference signal occupies at least four symbols, and two symbols are present in at least four symbols, and the interval between symbols of the two existing symbols is not more than two symbols. .

The reference signal occupies at least four symbols in each occupied subframe, which can ensure that the receiving device of the reference signal can obtain sufficient reference signal resources for frequency offset estimation, and can also ensure high-speed movement of the communication device and fast channel fading. In severe cases, more reference signals can be obtained at unit time, so that the channel estimation result based on the reference signal is more accurate.

Wherein, there are two symbols in the at least four symbols, and the interval between the symbols of the two symbols is not more than two symbols, in order to ensure that a large frequency deviation value can be correctly estimated. The larger the interval between the two symbols including the reference signal, the smaller the frequency deviation value that the receiving device of the reference signal can accurately estimate.

In the scene of high-speed movement and high power deviation, the reference signal occupies 4 symbols in one subframe. If the receiving device receives by linear receiver, it cannot completely overcome the influence of high-speed movement and large frequency deviation. At this time, the receiving device needs to use a high-performance high-performance receiver such as decision feedback or iterative equalization for processing.

In order to further increase the density of the reference signal in the time domain, more reference signals are provided for channel estimation, and in order to reduce the complexity of the receiver of the receiving device, optionally, in each subframe occupied by the reference signal, the reference signal It occupies at least five symbols, and there are two symbols in at least five symbols, and the existing two symbols have no more than two symbols.

Further, in each time slot of one subframe, the reference signal occupies at least two symbols because: if in one subframe, all reference signals are in one time slot, and the other If there is no reference signal in the time slot, the channel estimation result of the time slot without the reference signal is inaccurate and the data demodulation performance is degraded under the condition of high moving speed.

Wherein, in each time slot of one subframe, the reference signal occupies at least two symbols because: if in one subframe, all reference signals are in one time slot, and not in another time slot The reference signal causes the channel estimation result of the time slot without the reference signal to be inaccurate and the data demodulation performance to be degraded under the condition of high moving speed. This is because if the channel characteristics do not change much within one subframe under the condition of low-speed movement, the channel characteristics of one slot in one subframe do not differ much from the channel characteristics of another slot. Under the condition of high-speed movement, the channel characteristics of two time slots of one subframe are very different, and it is required to have a reference signal in each time slot.

Further, in order to save the physical resources occupied by the reference signal and improve the data transmission efficiency, in the frequency domain, in each resource unit occupied by the reference signal, the reference signal occupies a plurality of discontinuous subcarriers. In an LTE system, the resource unit may be a Physical Resource Block (PRB).

The reference signal occupies discontinuous subcarriers, which ensures that the total overhead of all reference signals in one subframe is small. Because, in order to ensure the estimation performance of the frequency deviation value and the support for the high-speed moving scene, the density of the reference signal is increased in the time domain, so if the frequency domain is continuous, the overhead of the reference signal is high, and After the density in the time domain is sufficient to resist large frequency offsets and high moving speeds, it is not necessary to occupy consecutive subcarriers in the frequency domain.

Optionally, in the frequency domain, the reference signal occupies at least three subcarriers in each of the foregoing resource units occupied by the reference signal. Taking the PRB as an example, one PRB includes 12 subcarriers, and among the 12 subcarriers, the reference signal occupies at least 3 subcarriers.

It is assumed that in the LTE system, the reference signal occupies all of the subcarriers in one symbol in each of the two slots of one subframe, occupying a total of 24 subcarriers. The solution provided in Embodiment 2 is used, for example, in the time domain, the reference signal occupies 4 symbols in one time slot; in the frequency domain, the reference signal occupies 3 subcarriers in one PRB, and the reference signal is in one time slot. Totally occupied The number of subcarriers is 2*4*3=24 subcarriers. For example, in the time domain, the reference signal occupies 4 symbols in one time slot; in the frequency domain, the reference signal occupies 4 subcarriers in one PRB, and the total number of subcarriers occupied by the reference signal in one time slot It is 2*4*4=32 subcarriers.

Optionally, in the time domain, in each subframe occupied by the reference signal, the number of symbols occupied by the first reference signal is smaller than the number of symbols in the subframe available for transmitting data.

Optionally, in the time domain, in each of the time slots occupied by the reference signal, the reference signal occupies adjacent symbols.

As described above, the larger the interval between the two symbols including the reference signal, the smaller the frequency offset value that the receiving device of the reference signal can accurately estimate, and therefore, each of each subframe occupied by the reference signal In the slot, the reference signal occupies a plurality of adjacent symbols, and the estimation performance of the frequency offset value of each slot by the receiving device 502 can be guaranteed.

Further, in each time slot in each subframe occupied by the reference signal, the reference signals respectively occupy two sets of symbols, and each set of symbols includes adjacent multiple symbols.

This ensures the performance of the receiving device 502 in estimating the frequency offset value in each time slot. And it can ensure that the maximum frequency deviation value in any one time slot, and the communication device moves at a high speed, even if the signal to noise ratio is low, the channel estimation and the frequency deviation value estimation performance can be better, and the reference signal is occupied. The more the number of symbols, the stronger the ability of the receiving device 502 to suppress noise when performing channel estimation, and the stronger the ability to estimate the frequency offset value.

Optionally, in each subframe occupied by the reference signal, the last symbol is a null symbol (GAP).

Optionally, the reference signal is transmitted from the same antenna port because the receiving device can accurately estimate the large frequency offset value only when receiving the reference signal from the same antenna port because: From the receiving device side, the channel characteristics of signals from different antenna ports will be different, so the estimation of the frequency offset can only be performed for the reference signal of the same antenna port.

In various embodiments of the present application, including the second embodiment and the third embodiment, the receiving device 502 can estimate the frequency deviation value as follows:

The frequency offset value produces a phase offset associated with the symbol position on each subcarrier of each symbol. The difference, on a symbol, the phase deviation value is the same. Taking the case where the reference signals occupy the same subcarrier positions on different symbols as an example, as shown in FIG. 8D, the reference signal occupies

subcarriers

1, 5, and 9 on symbol 0 (the subcarrier numbers are from bottom to top, starting from 0). No.), the reference signal also occupies

subcarriers

1, 5, and 9 at symbol 1. The reference signals on the respective subcarriers on the symbol 0 are respectively conjugate-multiplied with the reference signals at the corresponding subcarrier positions on the symbol 1, and then the results obtained by multiplying the conjugate are filtered to obtain an estimate. This phase deviation value is then used to estimate the frequency deviation value based on this phase deviation value.

Further, when estimating, the accuracy of the estimation may be affected by interference and thermal noise. Therefore, when there are more time domain reference signal symbols or subcarriers of the reference signal in the frequency domain to ensure certain data, it is ensured according to The accuracy of the frequency deviation value estimated by the reference signal.

In the following, various alternative mapping manners for mapping reference signals to non-synchronized subframes provided in Embodiment 2 are specifically described.

[Embodiment 2]

The various alternative reference signal mapping modes of the second embodiment are exemplified below with reference to FIG. 8A to FIG. 8P.

Mapping method one

In the mapping mode, there is no GAP in the subframe occupied by the reference signal, and the CP is a normal CP. In the time domain, the reference signal occupies 8 symbols in one subframe, and in the two slots of the subframe occupied by the reference signal, The reference signal occupies 4 symbols on each time slot.

FIG. 8A shows nine alternative mapping modes of mapping mode one. In Figure 8A, each row represents an alternative mapping method. The numbers 0 to 6 indicate symbols numbered 0 to 6 in one slot. The bold underlined symbol is the symbol occupied by the reference signal, and the others are data symbols, excluding the reference signal.

The reference signal mapping manner of the first time slot and the second time slot of one subframe may be the same or different, and the reference signals of the first time slot and the second time slot may be any one of the lines shown in FIG. 8A. The way to map.

As described above, in the second embodiment, in the frequency domain, in each resource unit occupied by the reference signal, The reference signal may occupy a plurality of discontinuous subcarriers or occupy only one subcarrier. The following describes several optional frequency domain mapping modes. These optional frequency domain mapping modes are applicable not only to mapping mode 1, but also to other mapping modes of the second embodiment.

1, frequency domain mapping method one

Taking the time domain mapping mode of the first row shown in FIG. 8A as an example, the reference signals occupy

symbols

0, 1, 4, and 5 in two slots of one subframe, respectively, and occupy 8 symbols in one subframe.

The frequency domain mapping manner is as shown in Fig. 8B, in which the number in the lowermost row indicates the number of the symbol. FIG. 8B shows a frequency domain mapping manner in which the subframe has a normal CP, and one resource unit PRB in the frequency domain includes 12 subcarriers. In the direction of the frequency domain, subcarriers of four reference signals are placed at medium intervals in each PRB, and the subcarriers occupied by the reference signals have the same position in the frequency domain on different symbols occupied by the reference signals.

2. Frequency domain mapping method 2

Alternatively, the positions of the subcarriers occupied by the reference signal in the frequency domain may be staggered as shown in FIG. 8C.

3, frequency domain mapping mode three

FIG. 8D illustrates a frequency domain mapping manner in which the reference signal occupies 3 subcarriers on each PRB, and the subcarriers occupied by the reference signal have the same position in the frequency domain on different symbols occupied by the reference signal.

4, frequency domain mapping method four

FIG. 8E also shows a frequency domain mapping manner in which the reference signal occupies 3 subcarriers on each PRB, but unlike the frequency domain mapping mode 3, the positions of the subcarriers occupied by the reference signal in the frequency domain may be staggered.

As described above, the foregoing optional frequency domain mapping mode can be applied not only to the mapping mode 1 but also to other mapping modes of the second embodiment. The time domain mapping mode and the frequency domain mapping mode of the reference signal do not have to be bound, and can be combined with each other. In the following, for the sake of simplicity of description, only various time domain mapping manners in which reference signals are within one subframe in different situations are given.

Mapping method two

In mapping mode 2, there is a GAP in the subframe occupied by the reference signal, and the CP is a normal CP. In the time domain, the reference signal occupies 8 symbols in one subframe, and is in two slots of the subframe occupied by the reference signal. The reference signal occupies 4 symbols each time slot.

Optionally, the GAP is located in the last symbol in a subframe and does not send any information. As shown in FIG. 8F, the last symbol in the subframe is symbol 6, which is GAP.

Several alternative mapping modes of mapping mode 2 can be as shown in FIG. 8F.

Mapping method three

In the mapping mode, there is no GAP in the subframe occupied by the reference signal, and the CP is a normal CP. In the time domain, the reference signal occupies 6 symbols in one subframe, and is in the two slots of the subframe occupied by the reference signal. The reference signal occupies 3 symbols on each time slot.

The reference signal mapping manner of the first time slot and the second time slot of one subframe may be the same or different, and the reference signals of the first time slot and the second time slot may be any one of the lines shown in FIG. 8G. The way to map.

Mapping method four

In the mapping mode, the reference signal occupies a GAP in the subframe, and the CP is a normal CP. In the time domain, the reference signal occupies 6 symbols in one subframe, and is in the two slots of the subframe occupied by the reference signal. The reference signal occupies 3 symbols on each time slot.

Optionally, the GAP is located in the last symbol in a subframe and does not send any information. As shown in FIG. 8H, the last symbol in the subframe is symbol 6, which is GAP.

Several alternative mapping modes of mapping mode 4 can be shown in Figure 8H.

Mapping method five

In the mapping mode, the CP is a normal CP. In a subframe occupied by the reference signal, in the first time slot, the reference signal occupies 4 symbols, and the reference signal can be used when 8 subframes are occupied by one subframe reference signal. The mapping mode in the first time slot is mapped; in the second time slot, the reference signal occupies 3 symbols, and the mapping of the reference signal in the second time slot when 6 subframes are occupied by one subframe reference signal Way to map. When there is no GAP in the symbol occupied by the reference signal, an example of several optional mapping modes may be as shown in FIG. 8I. When the reference signal occupies a symbol, there are GAP, several An example of an optional mapping method can be as shown in Figure 8J.

Alternatively, in the first time slot, the reference signal occupies 3 symbols, and in the second time slot, the reference signal occupies 4 symbols. There can be a variety of different combinations, and are not limited here.

Mapping method six

In the mapping mode six, the CP is an extended CP, and the reference signal occupies 7 symbols in one subframe occupied by the reference signal. In the first time slot, the reference signal occupies 4 symbols, and an example of several mapping modes is shown in FIG. 8K; in the second time slot, the reference signal occupies 3 symbols, and FIG. 8L shows several An example of a mapping method.

Mapping method seven

In the mapping mode, there is a GAP in the subframe occupied by the reference signal, and the CP is an extended CP. In one subframe occupied by the reference signal, the reference signal occupies 7 symbols. In the first time slot of the subframe, the reference signal may adopt any mapping manner as shown in FIG. 8K, and in the second time slot of the subframe, the reference signal may adopt any one shown in FIG. 8M. Mapping method.

Mapping mode eight

In the mapping mode, there is no GAP in the subframe occupied by the reference signal, and the CP is an extended CP. In one subframe occupied by the reference signal, the reference signal occupies 6 symbols, wherein the first and second of the subframe In the time slots, the reference signals each occupy 3 symbols, and the reference signals in the first time slot and the second time slot may adopt any mapping manner as shown in FIG. 8L.

Mapping method nine

In the mapping mode, the last symbol in the subframe occupied by the reference signal is GAP, no information is sent, and the CP is an extended CP. In one subframe occupied by the reference signal, the reference signal occupies 6 symbols. In the first time slot, the reference signal may adopt any one of the mapping modes shown in FIG. 8L, and in the second time slot, the reference signal may adopt any one of the mapping modes shown in FIG. 8M.

Mapping method ten

In the mapping mode, there is no GAP in the subframe occupied by the reference signal, and the CP is an extended CP. In one subframe occupied by the reference signal, the reference signal occupies 5 symbols. In the first time slot of the subframe, the reference signal occupies 3 symbols, and in the second time slot, the reference signal occupies 2 symbols.

The mapping manner of the reference signal in the first time slot may be as shown in FIG. 8N, and the mapping manner in the second time slot may be as shown in FIG. 8O.

Mapping mode eleven

In mapping mode 11, the last symbol in the subframe occupied by the reference signal is GAP, and CP is an extended CP. In one subframe occupied by the reference signal, the reference signal occupies 5 symbols. In the first time slot of the subframe, the reference signal occupies 3 symbols, and in the second time slot, the reference signal occupies 2 symbols.

The mapping manner of the reference signal in the first time slot of one subframe may be the same as the mapping manner of the first time slot in the mapping mode, and may be mapped in the second time slot as shown in FIG. 8N. Can be as shown in Figure 8P.

In Figures 8F-8P, each row represents an alternative mapping method. The numbers 0 to 6 indicate symbols numbered 0 to 6 in one slot. The bold underlined symbol is the symbol occupied by the reference signal, and the others are data symbols, excluding the reference signal.

In the following, various alternative mapping manners for mapping reference signals to synchronization subframes provided in Embodiment 3 are specifically described.

[Embodiment 3]

In the third embodiment, the reference signal is mapped into the synchronization subframe. A synchronization signal is included in the synchronization subframe, and the synchronization signal is used for synchronization between communication devices.

Here, the synchronization subframe is exemplified by a synchronization subframe in the current D2D system. Wherein, the PD2DSS is, and the SD2DSS is, in the subframe, the last symbol may be a GAP, or the GAP is not included in the subframe. The reference signal is exemplified by DMRS.

FIG. 9A shows the manner in which the current DMRS is mapped in the synchronization subframe of the D2D system. The DMRS occupies the symbol 3 of the first time slot and the second time slot, respectively. The symbol between the symbols occupied by the two DMRSs and the symbol 0 of the first slot are used to transmit the PSBCH signal. The time-frequency resource shown in FIG. 9A occupies a subframe of 1 ms in the time domain, and occupies 6 PRBs in the frequency domain.

As mentioned above, in order to adapt to high-speed moving scenes and/or scenes with large frequency deviations, in order to accurately perform channel estimation and/or frequency offset estimation, the reference signal is increased in the time domain. Density, and the position between the reference signals is set, and, optionally, non-continuously mapped in the frequency domain to reduce the overhead of the reference signal in the entire sub-frame.

The mapping of the reference signals in the synchronization subframe is exemplified below with reference to FIGS. 9B to 9D to achieve the above object. The reference signal can be determined as the first type of reference signal, and the first type of reference signal is used to achieve the above purpose.

Optionally, the reference signal may occupy 7 symbols in the synchronization subframe, wherein 4 symbols are occupied in the first slot, as shown in FIG. 8B, where P represents PD2DSS; in the second slot The mapping mode is as shown in FIG. 8C when there is no GAP in the synchronization subframe, and the mapping mode is shown in FIG. 8D when the last symbol in the synchronization subframe is GAP. In FIG. 8C and FIG. 8D, S represents SD2DSS.

Optionally, the reference signal may also occupy 6 symbols in the synchronization subframe, where 3 symbols are occupied in the first and second slots, or 4 symbols are occupied in the first slot. Two time slots occupy 2 symbols.

Alternatively, the reference signal may also occupy 5 symbols in the synchronization subframe, wherein 3 symbols are occupied in the first slot and 2 symbols are occupied in the second slot.

In the second embodiment and the third embodiment, when the number of symbols occupied by the reference signal in one subframe is extended to at least five, the reference signal overhead is compared with the current LTE protocol due to the non-contiguous mapping manner in the frequency domain. The overhead of the reference signal is basically the same, that is, no additional system overhead is added, and the time domain density of the reference signal is increased, thereby improving the support for high-speed movement and high frequency deviation scenarios.

The above describes the scenarios in which the first type of reference signals are transmitted in the second embodiment and the third embodiment to accommodate high-speed movement, high frequency deviation, and the like. The following describes the power adjustment scheme provided by the present application by using the fourth embodiment and the fifth embodiment. The following problems can be solved by using the fourth embodiment and the fifth embodiment:

Since the PAPR of the reference signal is higher than the data, when the transmit power of the transmitter of the transmitting device enters the saturation region, the reference signal deviates from the transmit power of the data. When amplitude modulation is applied to the data, the receiver may perform data solution. An error occurred while tuning.

In the fourth embodiment and the fifth embodiment, the sending device 501 sends a reference signal, and the receiving device For the process of receiving the reference signal, reference may be made to the first embodiment. The fourth embodiment adds the power device 501 to the receiving device 502 according to the first embodiment. The fifth embodiment is based on the first embodiment. The transmitting device 501 performs power adjustment before transmitting the reference signal.

The fourth embodiment and the fifth embodiment can also be combined with the reference signal mapping schemes provided in the second embodiment and the third embodiment to improve the channel estimation and frequency offset of the receiving device 502 in the scenario of adapting to the high-speed movement and/or large frequency deviation. The correctness of the estimate.

Hereinafter, Embodiment 4 and Embodiment 5 will be described with reference to the drawings.

[Embodiment 4]

In the fourth embodiment, the transmitting device 501 sends power indication information in addition to the reference signal and data to the receiving device 502, and the receiving device 502 determines whether the data and the transmission power of the reference signal are determined according to the received power indication information. There is a power deviation, and if there is a power deviation, the power deviation value is determined, and data demodulation is performed according to the determined power deviation value.

In the fourth embodiment, two kinds of signals are involved: a first signal and a second signal.

The first signal is used to carry data in a symbol that does not include a reference signal, and the second signal is a symbol that includes a reference signal in a subframe in which the first signal is located, where only the reference signal or the bearer reference signal and data are carried; or

The first signal is used to carry data in a symbol comprising a reference signal, and the second signal is a reference signal in the symbol.

In the fourth embodiment, two transmit power values are involved: a first transmit power value and a second transmit power value, the first transmit power value is a transmit power value of the first signal, and the second transmit power value is a transmit power of the second signal. value. When the first transmit power value is greater than the transmit power threshold, there is a power offset value between the first transmit power value and the second transmit power value, and the first transmit power value is less than the second transmit power value.

In the fourth embodiment, a transmission power threshold is used, and the transmission power threshold is used to determine whether the power deviation value exists.

In the fourth embodiment, the first power indication information is used, where the first power indication information is used to indicate:

The first transmit power value is greater than a transmit power threshold; or

a power deviation value between the first transmit power value and the second transmit power value of the second signal; or

First transmit power value;

Optionally, the second power indication information is further involved, where the second power indication information is used to indicate:

The first transmit power value.

Optionally, the first power indication information is used to indicate that there is a power deviation between the first transmit power value and the second transmit power value, and the second power indication information is used to indicate between the first transmit power value and the second transmit power value. If there is no power deviation, in the specific implementation, whether there is a power deviation between the first transmit power value and the second transmit power value may be indicated by the 1 bit information, if the 1 bit information is “0”, the first transmit power value and the first There is no power deviation between the two transmit power values. If the 1-bit information is "1", there is a power deviation between the first transmit power value and the second transmit power value.

FIG. 10 is a flow chart showing the flow of interaction between the transmitting device 501 and the receiving device 502 in Embodiment 4, the process including the following steps:

S1001: The transmitting device 501 of the first signal acquires the first transmit power value Ptx;

S1002: determining whether the first transmit power value is greater than the transmit power threshold Ptx_th-Δ, and if so, executing step S1003, if not, optionally performing step S1006;

In the judgment, Ptx+Δ can be compared with Ptx_th. If (Ptx+Δ)>Ptx_th, the first transmit power is greater than the transmit power threshold. Here, Δ is a preset parameter used to determine the power deviation value between the reference signal and the data due to the PAPR problem; Ptx_th is a predefined parameter used to determine whether the transmitter's transmit power enters the saturation region. Threshold. For example, the saturation power of the transmitting device 501 is 23 dBm, Δ = 2 dB. Then, if Ptx>21dBm, it indicates that the transmission power of the reference signal is saturated. The corresponding physical meaning is that the transmission power of the reference signal is actually Ptx-Δ, and the transmission power of the data is Ptx. Also, the value of further Δ is related to the following factors:

1. The modulation method of the data of the sub-frame in which the reference signal is located, such as Quadrature Phase Shift Keying (QPSK), 16QAM, 64QAM, and the like.

2. Multi-carrier mode of data of the subframe in which the reference signal is located, for example: single carrier frequency division multiplexing (Single) Carrier-Frequency Division Multiplexing (SC-FDM), OFDM, Code Division Multiple Access (CDMA), etc.;

3, system bandwidth; for example: 1.4MHz, 3MHz, 5MHz, 10MHz and 20MHz;

4. The bandwidth occupied by the data in the sub-frame where the reference signal is located, for example, 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, and 20 MHz;

5. The reference signal is mapped to the mapping mode on the physical resource. For example, the types of different reference signals are divided according to different mapping manners, and then the value of Δ can also be determined according to the type of the reference signal.

S1003: The sending device 501 sends the first power indication information to the receiving device 502 of the first signal.

S1004: After receiving the first power indication information, the receiving device 502 determines that there is a power deviation between the first transmit power value and the second transmit power value of the second signal.

S1005: The receiving device 502 determines a power deviation value, and demodulates the data in the first signal or the data in the subframe where the first signal is located according to the determined power deviation value. According to the foregoing formula 1, the receiving device 502 obtains the estimated data. The amplitude value corresponding to the power deviation value is removed from the symbol to correctly demodulate the data;

S1006: The sending device 501 sends the second power indication information to the receiving device 502.

S1007: After receiving the second power indication information, the receiving device 502 determines that there is no power deviation between the first transmit power value and the second transmit power value of the second signal.

Wherein, if the first power indication information is used to indicate the power deviation value, the transmitting device 501 may determine the power deviation value Δ according to at least one of the following information before performing step S1003:

The mapping manner of the reference signal to the physical resource, the modulation mode of the data in the subframe where the reference signal is located, the multi-carrier mode of the data in the subframe where the reference signal is located, the system bandwidth, and the bandwidth occupied by the data in the subframe where the reference signal is located;

The type of the reference signal includes a first type of reference signal and a second type of reference signal. The first type of reference signal occupies more symbols in one subframe than the second type of reference signal occupies in one subframe.

In addition, the receiving device 502 may also perform at least one of the foregoing information when performing step S1005. One, determine the power deviation value Δ.

For example, the transmitting device 501 and the receiving device 502 can determine the power deviation value Δ by means of a look-up table. Table 2 shows the delta values when the reference signal is DMRS in different modulation modes and multi-carrier modes. The reference for comparison in Table 2 below is that SC-FDM modulation is used for data transmission, and there is no reference signal in each frequency domain subcarrier of this data symbol.

Table 2, power deviation value Δ

[Embodiment 5]

In the fifth embodiment, when the transmitting device determines that the transmit power of the data is greater than the transmit power threshold, the power adjustment is performed to prevent the transmit power of the transmitter from entering the saturated region.

In the fifth embodiment, two kinds of signals are also involved: the first signal and the second signal. It has the same meaning as the first signal and the second signal in the fourth embodiment.

In the fourth embodiment, the first transmit power value and the second transmit power value are involved, the first transmit power value is a transmit power value of the first signal, and the second transmit power value is a transmit power value of the second signal. When the first transmit power value is greater than the transmit power threshold, there is a power offset value between the first transmit power value and the second transmit power value, and the first transmit power value is less than the second transmit power value.

In the fifth embodiment, a transmission power threshold is used, and the transmission power threshold is used to determine whether the power deviation value is present, which is the same as the fourth embodiment.

In the fifth embodiment, when the sending device 501 determines that the first transmit power value is greater than the transmit power threshold, the power indication information is no longer sent to the receiving device 502, but the power adjustment of the transmitting device 501 is performed.

FIG. 11 shows a process flow of the sending device 501 in the fifth embodiment, including the following steps:

S1101: Acquire a first transmit power value.

S1102: determining whether the first transmit power value is greater than the transmit power threshold, and if so, executing step S1103;

S1103: determining a power adjustment amount;

The transmitting device 501 can determine Δ by using the transmitting device 501 or the receiving device 502 in the fourth embodiment to determine the power deviation value Δ, and use Δ as the power adjustment amount.

Here, a method in which the transmission device 501 determines the power adjustment amount is described by taking a reference signal mapping manner corresponding to different types of reference signals as an example. It is assumed that there are two types of reference signals, one is the aforementioned first type of reference signal, and the other is the aforementioned second type of reference signal. The PAPR of the two types of reference signals are different, and thus correspond to different power adjustment amounts. The transmitting device 501 can determine the power adjustment amount according to whether the reference signal is the first type of reference signal or the second type of reference signal.

S1104: performing power adjustment: reducing a transmit power of the first signal by a power adjustment amount, and reducing a transmit power of the second signal by a power adjustment amount (ie, ensuring that a transmit power of all signals does not enter a saturation region) or maintaining the second The transmit power of the signal is constant (only the transmit power of the data is reduced at this time, and the effective transmit power of the first signal after entering the saturation region is the same as the effective transmit power of the second signal).

In the fourth embodiment and the fifth embodiment, the power adjustment is performed by the sending device 501, or the power device is indicated to the receiving device 502, so that the receiving device 502 can perform accurate channel estimation according to the reference signal when performing data demodulation. The accurate channel estimation results correctly demodulate the data and improve the accuracy of data demodulation.

Next, the transmission scheme of the reference signal provided in Embodiment 6 will be described. In the sixth embodiment, when transmitting the reference signal, the sending device 501 can use different types of reference signals according to different scenarios, so as to achieve flexible use of the reference signal, improve the accuracy of the channel estimation of the receiving device 502, and reduce the reference signal overhead. The purpose is to obtain greater spectral efficiency while ensuring communication quality.

The solution provided in Embodiment 6 can be applied to any one of Embodiments 1 to 5 above. In the sixth embodiment, the process of transmitting the reference signal by the sending device 501 may refer to the first embodiment, and the process of receiving the reference signal by the receiving device 502 may also refer to the first embodiment.

[Embodiment 6]

FIG. 12 is a flowchart showing an optional interaction process between the sending device 501 and the receiving device 502 in the sixth embodiment, where the process includes the following steps:

S1201: The sending device 501 determines, according to the type of the synchronization source that is synchronized by itself and/or the moving speed of the transmitting device of the reference signal, that the reference signal is the first type reference signal or the second type reference signal;

S1202: The sending device 501 generates a reference signal.

S1203: The sending device 501 sends the generated reference signal.

S1204: The receiving device 502 determines the type of the reference signal sent by the sending device 501.

S1205: The receiving device 502 receives the reference signal according to the determined type of the reference signal;

S1206: The receiving device 502 performs signal processing on the received reference signal.

The sending device 501 may send the type indication information for indicating the type of the reference signal to the receiving device 502 in advance, and the receiving device 502 determines the reference signal type according to the received indication information.

In step S1201, the sending device 501 can determine the type of the reference signal in the following manner:

If the type of the synchronization source to which the sending device 501 is synchronized is a synchronization source whose synchronization precision is lower than the precision threshold, or the moving speed of the transmitting device 501 is higher than the moving speed threshold, determining that the reference signal is the first type of reference signal;

If the type of the synchronization source to which the transmitting device 501 is synchronized is a synchronization source whose synchronization precision is not lower than the precision threshold, and the moving speed of the transmitting device 501 is not higher than the moving speed threshold, it is determined that the reference signal is the second type of reference signal.

[Embodiment 7]

FIG. 13 is a schematic structural diagram of a first reference signal sending apparatus according to Embodiment 7 of the present application. As shown in Figure 13, the device includes:

The processing module 1301 is configured to generate a reference signal, where the reference signal is a first type of reference signal;

The sending module 1302 is configured to send the reference signal generated by the processing module 1301.

Wherein, in the time domain, in each subframe occupied by the first type of reference signal, the first type of reference signal occupies at least five symbols, and at least five symbols have two symbols, and the symbols of the two symbols present The interval is no more than two symbols.

Optionally, in each time slot of the subframe, the first type of reference signal occupies at least two symbols.

Optionally, in the frequency domain, in each resource unit occupied by the first type of reference signal, the reference signal occupies a plurality of discontinuous subcarriers.

Optionally, in the frequency domain, in each resource unit occupied by the first type of reference signal, the first type of reference signal occupies at least three subcarriers.

Optionally, in the time domain, in each subframe occupied by the first type of reference signal, the number of symbols occupied by the first reference signal is smaller than the number of symbols in the subframe that can be used for transmitting data.

Optionally, in the time domain, in each of the time slots occupied by the first type of reference signal, the reference signal occupies adjacent symbols.

Optionally, in each time slot in each subframe occupied by the first type of reference signal, the first type of reference signals respectively occupy two sets of symbols, and each set of symbols includes adjacent multiple symbols.

Optionally, if the subframe occupied by the first type of reference signal is a normal CP subframe, the symbols occupied by the first type of reference signal in one slot of the occupied subframe include:

Symbol 0, symbol 1, symbol 4, symbol 5, or

Symbol 0, symbol 1, symbol 3, symbol 4, or

Symbol 1, symbol 2, symbol 4, symbol 5, or

Symbol 1, symbol 2, symbol 5, symbol 6;

Symbol 0, symbol 1, symbol 4, symbol 5, or

Symbol 0, symbol 1, symbol 3, symbol 4, or

Symbol 1, symbol 2, symbol 4, symbol 5, or

Symbol 0, symbol 2, symbol 3, symbol 5.

Optionally, the subframe occupied by the first type of reference signal includes: a synchronization subframe and/or an asynchronous subframe;

The synchronization signal is included in the synchronization subframe, and the synchronization signal is not included in the asynchronous subframe.

Optionally, the receiving device of the sending device and the reference signal are both terminal devices; or

The sending device is a terminal device, and the receiving device of the reference signal is a network device;

The transmitting device is a network device, and the receiving device of the reference signal is a terminal device; or

The receiving device of the transmitting device and the reference signal are both network devices;

Optionally, the network device comprises a base station, and the terminal device comprises a user equipment UE or a roadside unit RSU.

Optionally, in each subframe occupied by the first type of reference signal, the last symbol is an empty symbol GAP.

Optionally, the first type of reference signal is a reference signal sent by the same antenna port.

Optionally, the processing module 1301 is further configured to: before generating the reference signal,

The reference signal is determined to be the first type of reference signal according to the type of the synchronization source to which the transmitting device of the reference signal is synchronized and/or the moving speed of the transmitting device of the reference signal.

Optionally, if the type of the synchronization source to which the transmitting device of the reference signal is synchronized is a synchronization source whose synchronization precision is lower than the precision threshold, or the moving speed of the transmitting device of the reference signal is higher than the moving speed threshold, determining the reference signal as the first Class reference signal.

In the seventh embodiment, the optional process of transmitting the reference signal by the sending device of the reference signal may refer to the sending process shown in FIG. 6 in the first embodiment. For various alternative implementations of the transmitting device of the reference signal, reference may be made to the operations of the transmitting device 501 in the second embodiment and the third embodiment, wherein the processing module 1301 is operable to perform processing operations of the transmitting device 501, and the transmitting module 1302 is configured to perform transmission. The transmitting operation of the device 501.

The processing module 1301 can be implemented by a processor, and the sending module 1302 can be implemented by a transmitter.

[Embodiment 8]

FIG. 14 is a schematic structural diagram of a second reference signal sending apparatus according to Embodiment 8 of the present application. As shown in Figure 14, the device includes:

The processor 1401 is configured to generate a reference signal, where the reference signal is a first type of reference signal;

a transmitter 1402, configured to send a reference signal generated by the processor 1401;

The various implementations of the processor 1401 may refer to the processing module 1301. The various implementations of the transmitter 1402 may refer to the sending module 1302.

In the seventh embodiment, the optional process of transmitting the reference signal by the sending device of the reference signal may refer to the sending process shown in FIG. 6 in the first embodiment. For various alternative implementations of the transmitting device of the reference signal, reference may be made to the operations of the transmitting device 501 in the second embodiment and the third embodiment, wherein the processor 1401 is operable to perform processing operations of the transmitting device 501, and the transmitter 1402 is operable to perform transmission. The transmitting operation of the device 501, the reference signal transmitted by the transmitter 1402 can be transmitted through one or more connected antennas.

[Embodiment 9]

FIG. 15 is a schematic structural diagram of a first reference signal receiving apparatus according to Embodiment 9 of the present application. As shown in Figure 15, the device includes:

a receiving module 1501, configured to receive a reference signal;

The processing module 1502 is configured to perform signal processing on the reference signal received by the receiving module 1502.

Optionally, in each time slot of the subframe, the first type of reference signal occupies at least two symbols,

Symbol 0, symbol 1, symbol 4, symbol 5, or

Symbol 0, symbol 1, symbol 3, symbol 4, or

Symbol 1, symbol 2, symbol 4, symbol 5, or

Symbol 1, symbol 2, symbol 5, symbol 6;

Symbol 0, symbol 1, symbol 4, symbol 5, or

Symbol 0, symbol 1, symbol 3, symbol 4, or

Symbol 1, symbol 2, symbol 4, symbol 5, or

Symbol 0, symbol 2, symbol 3, symbol 5.

Optionally, the sending device and the receiving device of the reference signal are both terminal devices; or

The transmitting device of the reference signal is a terminal device, and the receiving device is a network device;

The transmitting device of the reference signal is a network device, and the receiving device is a terminal device; or

The transmitting device and the receiving device of the reference signal are both network devices;

In the embodiment 9, the optional process of receiving and processing the reference signal by the receiving device of the reference signal may refer to the process shown in FIG. 7 in the first embodiment. For various alternative implementations of the receiving device of the reference signal, reference may be made to the operations of the receiving device 502 in the second embodiment and the third embodiment, wherein the processing module 1502 is operable to perform processing operations of the receiving device 502, and the receiving module 1501 is operable to perform receiving The receiving operation of device 502.

The processing module 1502 can be implemented by a processor, and the receiving module 1501 can be implemented by a receiver.

[Embodiment 10]

FIG. 16 is a schematic structural diagram of a first reference signal receiving apparatus according to Embodiment 10 of the present application. As shown in Figure 16, the device includes:

a receiver 1601, configured to receive a reference signal;

The processor 1602 is configured to perform signal processing on the reference signal received by the receiver 1602.

In the tenth embodiment, various optional implementations of the receiver 1601 may refer to the receiving module 1501. The various optional implementations of the processor 1602 may refer to the processing module 1502.

In the tenth embodiment, the optional process of receiving and processing the reference signal by the receiving device of the reference signal may refer to the process shown in FIG. 7 in the first embodiment. For various alternative implementations of the receiving device of the reference signal, reference may be made to the operations of the receiving device 502 in the second embodiment and the third embodiment, wherein the processor 1602 is operable to perform processing operations of the receiving device 502, and the receiver 1601 is operable to perform receiving The receiving operation of device 502.

[Embodiment 11]

FIG. 17 is a schematic structural diagram of a first device for transmitting power indication information according to Embodiment 11 of the present application. As shown in Figure 17, the device includes:

The processing module 1701 is configured to acquire a first transmit power value of the first signal;

The sending module 1702 is configured to: when the first transmit power value acquired by the processing module 1701 is greater than the transmit power threshold, send the first power indication information to the receiving device of the first signal, where the first power indication information is used to indicate:

The first transmit power value is greater than a transmit power threshold; or

First transmit power value;

The first signal is used to carry data in a symbol not including the reference signal, and the second signal is a reference signal in a symbol including the reference signal in the subframe in which the first signal is located; or

The first signal is used to carry data in a symbol including the reference signal, and the second signal is in the symbol Reference signal.

Optionally, the sending module 1702 is further configured to: after the processing module 1701 acquires the first transmit power value of the first signal in the subframe, if the acquired first transmit power value is not greater than the transmit power threshold, then the first signal is sent to the first signal. The receiving device sends the second power indication information, where the second power indication information is used to indicate:

The first transmit power value.

Optionally, if the first power indication information is used to indicate the power deviation value, the processing module 1701 is further configured to: before sending the first power indication information to the receiving device of the first signal, further comprising: according to at least one of the following information One, determine the power deviation value:

The mapping of the reference signal to the physical resource;

The modulation mode of the data in the subframe in which the reference signal is located;

System bandwidth

The bandwidth occupied by the data in the sub-frame where the reference signal is located.

For the various optional implementations of the sending device, refer to the processing of the sending device 501 in the fourth embodiment, where the processing module 1701 is configured to perform a processing operation of the sending device 501, and the sending module 1702 is configured to perform the sending of the sending device 501. operating.

The processing module 1701 can be implemented by a processor, and the sending module 1702 can be implemented by a transmitter.

[Twelfth embodiment]

FIG. 18 is a schematic structural diagram of a second device for transmitting power indication information according to Embodiment 12 of the present application. As shown in FIG. 18, the sending device includes:

The processor 1801 is configured to acquire a first transmit power value of the first signal.

The transmitter 1802 is configured to: when the first transmit power value acquired by the processor 1801 is greater than the transmit power threshold, send the first power indication information to the receiving device of the first signal, where the first power indication information is used to indicate:

The first transmit power value is greater than a transmit power threshold; or

First transmit power value;

The various optional implementations of the processor 1801 may refer to the processing module 1701. The various optional implementations of the transmitter 1802 may refer to the sending module 1702.

For other optional implementations of the sending device, reference may be made to the processing of the transmitting device 501 in the fourth embodiment, wherein the processor 1801 is configured to perform a processing operation of the transmitting device 501, and the transmitter 1802 is configured to perform a transmitting operation of the transmitting device 501.

The power indication information transmitted by the transmitter 1802 can be transmitted through one or more antennas.

[Thirteenth embodiment]

FIG. 19 is a schematic structural diagram of a first receiving apparatus for power indication information according to Embodiment 13 of the present application. As shown in FIG. 19, the receiving device includes:

The receiving module 1901 is configured to receive first power indication information that is sent by the sending device of the first signal, where the first power indication information is used to indicate that: the first transmit power value of the first signal is greater than a transmit power threshold; or the first transmit power value a power deviation value between the second transmission power value of the second signal; or a power deviation between the first transmission power value and the second transmission power value; or a first transmission power value;

The processing module 1902 is configured to determine, according to the first power indication information, that there is a power deviation between the first transmit power value and the second transmit power value of the second signal;

Determining a power deviation value, and demodulating data in the first signal or data in a subframe in which the first signal is located according to the determined power deviation value;

Wherein the first signal is used to carry data in a symbol not including the reference signal, and the second signal is a reference signal in a symbol including the reference signal in the subframe in which the first signal is located; or

Optionally, the processing module 1902 is specifically configured to: if the first power indication information is used to indicate a power deviation value,

Determining the power deviation value according to at least one of the following information: a mapping manner of the reference signal mapped to the physical resource, a modulation mode of the data in the subframe where the reference signal is located, a multi-carrier mode of the data in the subframe where the reference signal is located, and a system bandwidth And the bandwidth occupied by the data in the sub-frame where the reference signal is located.

For the various optional implementations of the receiving device, refer to the processing of the receiving device 502 in the fourth embodiment, where the processing module 1902 is configured to perform processing operations of the receiving device 502, and the receiving module 1901 is configured to perform receiving of the receiving device 502. operating.

The processing module 1902 can be implemented by a processor, and the receiving module 1901 can be implemented by a receiver.

[Embodiment 14]

FIG. 20 is a schematic structural diagram of a device for receiving second power indication information according to Embodiment 14 of the present application. As shown in FIG. 20, the receiving device includes:

The receiver 2001 is configured to receive first power indication information that is sent by the sending device of the first signal, where the first power indication information is used to indicate that: the first transmit power value of the first signal is greater than a transmit power threshold; or the first transmit power value a power deviation value between the second transmission power value of the second signal; or a power deviation between the first transmission power value and the second transmission power value; or a first transmission power value;

The processor 2002 is configured to determine, according to the first power indication information, that there is a power deviation between the first transmit power value and the second transmit power value of the second signal;

Optionally, the processor 2002 is specifically configured to: if the first power indication information is used to indicate a power deviation Value, then

For the various optional implementations of the receiving device, refer to the processing of the receiving device 502 in the fourth embodiment, where the processor 2002 is configured to perform processing operations of the receiving device 502, and the receiver 2001 is configured to perform receiving of the receiving device 502. operating.

[Embodiment 15]

FIG. 21 is a schematic structural diagram of a first transmit power adjustment apparatus according to Embodiment 15 of the present application. As shown in FIG. 21, the device includes:

The power value obtaining module 2101 is configured to acquire a first transmit power value of the first signal;

The first signal is used to carry data in a symbol that does not include a reference signal, the second signal is a reference signal in a symbol including a reference signal in a subframe in which the first signal is located; or the first signal is used to carry a symbol included in the reference signal Data, the second signal is a reference signal in the symbol;

The power adjustment module 2102 is configured to: when the first transmit power value acquired by the power value acquisition module 2101 is greater than the transmit power threshold, perform power adjustment: reduce the transmit power of the first signal by a power adjustment amount, and The transmit power reduces the amount of power adjustment or keeps the transmit power of the second signal constant.

Optionally, the power adjustment module 2102 is further configured to determine the power adjustment amount according to at least one of the following information before performing power adjustment:

The reference signal is mapped to the mapping mode on the physical resource, the modulation mode of the data in the subframe where the reference signal is located, the multi-carrier mode of the data in the subframe where the reference signal is located, the bandwidth of the system and the bandwidth occupied by the data in the subframe in which the reference signal is located.

For the various optional implementations of the device, refer to the operation of the sending device 501 in the fifth embodiment, where the power value obtaining module 2101 is configured to perform an operation of determining the signal transmitting power of the sending device 501, and the power adjusting module 2102 can be used for The operation of determining the power adjustment amount of the transmitting device 501 and performing power adjustment is performed.

The operation of the power value acquisition module 2101 and the power adjustment module 2102 can be implemented by a processor. The power adjustment amount determined by the power adjustment module 2102 can be applied to the power amplifier of the device for controlling the output power of the RF circuit, and the output of the RF circuit. Signals can be transmitted through one or more antennas.

[Embodiment 16]

FIG. 22 is a schematic structural diagram of a second transmission power adjustment apparatus according to Embodiment 16 of the present application. As shown in Figure 22, the device includes:

The processor 2201 is configured to acquire a first transmit power value of the first signal.

The processor 2201 is further configured to: when the obtained first transmit power value is greater than the transmit power threshold, perform power adjustment: reducing a transmit power of the first signal by a power adjustment amount, and reducing a transmit power of the second signal by a power adjustment The amount or the transmission power of the second signal is kept unchanged;

The RF circuit 2202 is configured to perform transmit power adjustment according to the power adjustment amount determined by the processor 2201.

Optionally, the processor 2201 is further configured to determine the power adjustment amount according to at least one of the following information before performing power adjustment:

For various alternative implementations of the device, reference may be made to the operation of the transmitting device 501 in Embodiment 5. The signal output by the RF circuit 2202 can be transmitted through one or more antennas.

[Embodiment 17]

FIG. 23 is a schematic structural diagram of a third reference signal transmitting apparatus according to Embodiment 17 of the present application. As shown in FIG. 23, the sending device includes:

The processing module 2301 is configured to: according to the type and/or reference signal of the synchronization source to which the transmitting device is synchronized a moving speed of the transmitting device, determining that the reference signal is a first type of reference signal or a second type of reference signal; and generating a reference signal;

The sending module 2302 is configured to send the reference signal generated by the processing module 2301.

Optionally, the processing module 2301 is specifically configured to:

If the type of the synchronization source to which the transmitting device of the reference signal is synchronized is a synchronization source whose synchronization precision is not lower than the precision threshold, and the moving speed of the transmitting device of the reference signal is not higher than the moving speed threshold, determining the reference signal as the second type reference signal.

In the embodiment 17, the optional process of transmitting the reference signal by the transmitting device of the reference signal may refer to the transmitting process shown in FIG. 6 in the first embodiment. For various alternative implementations of the transmitting device of the reference signal, reference may be made to the operation of the transmitting device 501 in Embodiment 6, wherein the processing module 2301 is operable to perform processing operations of the transmitting device 501, and the transmitting module 2302 is operable to perform transmission of the transmitting device 501. operating.

The processing module 2301 can be implemented by a processor, and the sending module 2302 can be implemented by a transmitter.

[Embodiment 18]

FIG. 24 is a schematic structural diagram of a fourth reference signal transmitting apparatus according to Embodiment 18 of the present application. As shown in FIG. 24, the sending device includes:

The processor 2401 is configured to determine, according to a type of the synchronization source to which the transmitting device is synchronized, and/or a moving speed of the transmitting device of the reference signal, the reference signal is a first type of reference signal or a second type of reference signal; and generate a reference signal;

a transmitter 2402, configured to send the reference signal generated by the processor 2401;

Optionally, the processor 2401 is specifically configured to:

In the eighteenth embodiment, the optional process for transmitting the reference signal by the transmitting device of the reference signal may refer to the sending process shown in FIG. 6 in the first embodiment. For various alternative implementations of the transmitting device of the reference signal, reference may be made to the operation of the transmitting device 501 in the sixth embodiment, wherein the processor 2401 is operable to perform processing operations of the transmitting device 501, and the transmitter 2402 is operable to perform transmission of the transmitting device 501. operating.

The reference signal transmitted by transmitter 2402 can be transmitted through one or more antennas.

[Example 19]

FIG. 25 is a schematic structural diagram of a third reference signal receiving apparatus according to Embodiment 18 of the present application. As shown in FIG. 25, the receiving device includes:

The processing module 2501 is configured to determine a type of the reference signal sent by the sending device of the reference signal, where the type of the reference signal includes: a first type of reference signal or a second type of reference signal;

The receiving module 2502 is configured to receive the reference signal according to the type of the reference signal determined by the processing module 2501;

The processing module 2501 is further configured to: perform signal processing on the reference signal received by the receiving module 2502;

In the embodiment 19, the optional process of receiving and processing the reference signal by the receiving device of the reference signal may refer to the process shown in FIG. 7 in the first embodiment. For various alternative implementations of the receiving device of the reference signal, reference may be made to the operation of the receiving device 502 in the sixth embodiment, wherein the processing module 2501 is operable to perform processing operations of the receiving device 502, and the receiving module 2502 is operable to perform receiving of the receiving device 502. operating.

The processing module 2501 can be implemented by a processor, and the receiving module 2502 can be implemented by a transmitter.

[Embodiment 20]

FIG. 26 is a schematic structural diagram of a fourth reference signal receiving apparatus according to Embodiment 18 of the present application.

As shown in FIG. 26, the receiving device includes:

The processor 2601 is configured to determine a type of the reference signal sent by the sending device of the reference signal, where the type of the reference signal includes: a first type of reference signal or a second type of reference signal;

The receiver 2602 is configured to receive the reference signal according to the type of the reference signal determined by the processor 2601;

The processor 2601 is further configured to: perform signal processing on the reference signal received by the receiver 2602;

In the embodiment 20, the optional process of receiving and processing the reference signal by the receiving device of the reference signal may refer to the process shown in FIG. 7 in the first embodiment. For various alternative implementations of the receiving device of the reference signal, reference may be made to the operation of the receiving device 502 in the sixth embodiment, wherein the processor 2601 is operable to perform processing operations of the receiving device 502, and the receiver 2602 is operable to perform receiving of the receiving device 502. operating.

Receiver 2602 can receive the reference signal through one or more antennas.

[Embodiment 21]

FIG. 27 is a flowchart of a first method for transmitting a reference signal according to Embodiment 21 of the present application. As shown in FIG. 27, the method includes the following steps:

S2701: generating a reference signal, where the reference signal is a first type of reference signal;

S2702: Send the generated reference signal;

Symbol 0, symbol 1, symbol 4, symbol 5, or

Symbol 0, symbol 1, symbol 3, symbol 4, or

Symbol 1, symbol 2, symbol 4, symbol 5, or

Symbol 1, symbol 2, symbol 5, symbol 6;

Symbol 0, symbol 1, symbol 4, symbol 5, or

Symbol 0, symbol 1, symbol 3, symbol 4, or

Symbol 1, symbol 2, symbol 4, symbol 5, or

Symbol 0, symbol 2, symbol 3, symbol 5.

The transmitting device of the reference signal is a terminal device, and the receiving device of the reference signal is a network device;

Optionally, before generating the reference signal, the method further includes:

In the method, an optional process of generating and transmitting a reference signal may refer to the sending process shown in FIG. 6 in Embodiment 1. For various alternative implementations of the method, reference may be made to the operations of the transmitting device 501 in the second embodiment and the third embodiment.

[Embodiment 22]

FIG. 28 is a flowchart of a first reference signal receiving method according to Embodiment 22 of the present application. As shown in FIG. 28, the method includes the following steps:

S2801: receiving a reference signal, where the reference signal is a first type of reference signal;

S2802: Perform signal processing on the received reference signal;

Symbol 0, symbol 1, symbol 4, symbol 5, or

Symbol 0, symbol 1, symbol 3, symbol 4, or

Symbol 1, symbol 2, symbol 4, symbol 5, or

Symbol 1, symbol 2, symbol 5, symbol 6;

Symbol 0, symbol 1, symbol 4, symbol 5, or

Symbol 0, symbol 1, symbol 3, symbol 4, or

Symbol 1, symbol 2, symbol 4, symbol 5, or

Symbol 0, symbol 2, symbol 3, symbol 5.

In the method, an optional process of receiving and processing the reference signal may refer to the process shown in FIG. 7 in the first embodiment. For various alternative implementations of the method, reference may be made to the operations of the receiving device 502 in the second embodiment and the third embodiment.

[Embodiment 23]

FIG. 29 is a flowchart of a method for transmitting power indication information according to Embodiment 23 of the present application. As shown in FIG. 29, the method includes the following steps:

S2901: Acquire a first transmit power value of the first signal;

S2902: If the obtained first transmit power value is greater than the transmit power threshold, send the first power indication information to the receiving device of the first signal, where the first power indication information is used to indicate:

The first transmit power value is greater than a transmit power threshold; or

First transmit power value;

Optionally, after acquiring the first transmit power value of the first signal in the subframe, the method further includes:

If the obtained first transmit power value is not greater than the transmit power threshold, send the second power indication information to the receiving device of the first signal, where the second power indication information is used to indicate:

The first transmit power value.

Optionally, if the first power indication information is used to indicate the power deviation value, before the sending the first power indication information to the receiving device of the first signal, the method further includes: determining the power deviation value according to at least one of the following information: :

The mapping of the reference signal to the physical resource;

System bandwidth

For various alternative implementations of the method, reference may be made to the processing of the transmitting device 501 in the fourth embodiment.

[Embodiment 24]

FIG. 30 is a flowchart of a method for receiving power indication information according to Embodiment 24 of the present application. As shown in FIG. 30, the method includes the following steps:

S3001: The first power indication information sent by the sending device that receives the first signal, where the first power indication information is used to indicate that the first transmit power value of the first signal is greater than a transmit power threshold; or the first transmit power value and the second signal a power deviation value between the second transmit power values; or a power offset between the first transmit power value and the second transmit power value; or a first transmit power value;

S3002: Determine, according to the first power indication information, that there is a power deviation between the first transmit power value and the second transmit power value of the second signal;

S3003: Determine a power deviation value, and demodulate data in the first signal or data in a subframe in which the first signal is located according to the determined power deviation value;

Optionally, if the first power indication information is used to indicate the power deviation value, determining the power deviation value, including:

For various alternative implementations of the method, reference may be made to the processing of the receiving device 502 in the fourth embodiment.

[Embodiment 25]

FIG. 31 is a flowchart of a method for adjusting transmit power provided by Embodiment 25 of the present application. As shown in FIG. 31, the method includes the following steps:

S3101: Acquire a first transmit power value of the first signal.

The first signal is used to carry data in a symbol including the reference signal, and the second signal is a reference signal in the symbol;

S3102: If the obtained first transmit power value is greater than the transmit power threshold, perform power adjustment by reducing a transmit power of the first signal by a power adjustment amount, and reducing a transmit power of the second signal by a power adjustment amount or maintaining the first The transmit power of the two signals is unchanged.

Optionally, before performing power adjustment, the method further includes: determining, according to at least one of the following information, a power adjustment amount: a mapping manner in which the reference signal is mapped to the physical resource, a modulation manner of the data in the subframe where the reference signal is located, and a reference. The multicarrier mode of the data in the subframe in which the signal is located, the system bandwidth, and the bandwidth occupied by the data in the subframe in which the reference signal is located.

For various alternative implementations of the method, reference may be made to the operation of the transmitting device 501 in the fifth embodiment.

[Embodiment 26]

FIG. 32 is a flowchart of a second method for transmitting a reference signal according to Embodiment 26 of the present application. As shown in FIG. 32, the method includes the following steps:

S3201: determining, according to a type of the synchronization source to which the transmitting device of the reference signal is synchronized and/or a moving speed of the transmitting device of the reference signal, the reference signal is a first type reference signal or a second type reference signal;

S3202: generate a reference signal;

S3203: Send the generated reference signal;

Optionally, determining the reference signal as the first type of reference signal or the second type of reference signal according to the type of the synchronization source to which the transmitting device of the reference signal is synchronized and/or the moving speed of the transmitting device of the reference signal, including:

In the method, an optional process for transmitting the reference signal may refer to the sending process shown in FIG. 6 in the first embodiment. For various alternative implementations of the method, reference may be made to the operation of the transmitting device 501 in Embodiment 6.

[Embodiment 27]

FIG. 33 is a flowchart of a second method for receiving a reference signal according to Embodiment 27 of the present application. As shown in FIG. 33, the method includes the following steps:

S3301: determining a type of the reference signal sent by the sending device of the reference signal, where the type of the reference signal includes: a first type of reference signal or a second type of reference signal;

S3302: Receive a reference signal according to the determined type of the reference signal;

S3303: Perform signal processing on the received reference signal.

In the method, an optional process of receiving and processing the reference signal may refer to the process shown in FIG. 7 in the first embodiment. For various alternative implementations of the method, reference may be made to the operation of the receiving device 502 in the sixth embodiment.

In summary, in the present application, on the one hand, in order to ensure normal communication between communication devices with large frequency deviations, the reference signals transmitted between the communication devices satisfy the following conditions:

Wherein, there are two symbols in the at least five symbols, and the interval between the symbols of the two symbols is not more than two symbols, in order to ensure that a large frequency deviation value can be correctly estimated. The larger the interval between two symbols containing the reference signal, the frequency deviation of the reference signal receiving device that can be accurately estimated The smaller the value.

On the other hand, for the problem caused by the PAPR of the reference signal being generally higher than the PAPR of the data, a solution including the following two solutions is provided in the present application:

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of the method, apparatus (system), and computer program product according to the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Compilation of functions specified in one or more blocks of a flow or a flow and/or block diagram of a flow chart Set.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Although the preferred embodiment of the invention has been described, it will be apparent to those skilled in the < Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It will be apparent to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit and scope of the application. Thus, it is intended that the present invention cover the modifications and the modifications of the invention

Claims

A transmitting device for a reference signal, comprising:

a processing module, configured to generate a reference signal, where the reference signal is a first type of reference signal;

a sending module, configured to send the reference signal generated by the processing module;

In the time domain, in each subframe occupied by the first type of reference signal, the first type of reference signal occupies at least five symbols, and two symbols in the at least five symbols are present. The inter-symbol spacing of the two symbols is no more than two symbols.
The transmitting device according to claim 1, wherein said first type of reference signal occupies at least two symbols in each time slot of said subframe.
A transmitting device according to claim 1 or 2, characterized in that

In the frequency domain, in each resource unit occupied by the first type of reference signal, the reference signal occupies a plurality of discontinuous subcarriers.
The transmitting device according to any one of claims 1 to 3, wherein in the frequency domain, in each resource unit occupied by the first type of reference signal, the first type of reference signal occupies at least three Subcarriers.
The transmitting device according to any one of claims 1 to 4, wherein in the time domain, the number of symbols occupied by the first reference signal in each subframe occupied by the first type of reference signal Less than the number of symbols in the sub-frame that can be used to transmit data.
The transmitting device according to any one of claims 1 to 5, wherein in the time domain, in each time slot in each subframe occupied by the first type of reference signal, the reference signal Occupies multiple adjacent symbols.
The transmitting device according to claim 6, wherein in each of the time slots occupied by the first type of reference signals, the first type of reference signals respectively occupy two sets of symbols, each A set of symbols includes a plurality of adjacent symbols.
The transmitting device according to any one of claims 1 to 5, characterized in that

If the subframe occupied by the first type of reference signal is a normal CP subframe, the first type of reference signal The symbols occupied by the number in one slot in the occupied subframe include:

Symbol 0, symbol 1, symbol 4, symbol 5, or

Symbol 0, symbol 1, symbol 3, symbol 4, or

Symbol 1, symbol 2, symbol 4, symbol 5, or

Symbol 1, symbol 2, symbol 5, symbol 6;

If the subframe occupied by the first type of reference signal is a normal CP subframe, the symbols occupied by the first type of reference signal in one slot of the occupied subframe include:

Symbol 0, symbol 1, symbol 4, symbol 5, or

Symbol 0, symbol 1, symbol 3, symbol 4, or

Symbol 1, symbol 2, symbol 4, symbol 5, or

Symbol 0, symbol 2, symbol 3, symbol 5.
The transmitting device according to any one of claims 1 to 8, wherein the subframe occupied by the first type of reference signal comprises: a synchronization subframe and/or an asynchronous subframe;

The synchronization subframe includes a synchronization signal, and the synchronization signal is not included in the asynchronous subframe.
The transmitting device according to any one of claims 1 to 9, wherein

The transmitting device and the receiving device of the reference signal are both terminal devices; or

The sending device is a terminal device, and the receiving device of the reference signal is a network device;

The sending device is a network device, and the receiving device of the reference signal is a terminal device; or

The sending device and the receiving device of the reference signal are both network devices;
The transmitting device according to claim 10, wherein the network device comprises a base station, and the terminal device comprises a user equipment UE or a roadside unit RSU.
The transmitting device according to any one of claims 1 to 11, wherein in each subframe occupied by the first type of reference signal, the last symbol is a null symbol GAP.
The transmitting device according to any one of claims 1 to 12, wherein the first type of reference signal is a reference signal transmitted by the same antenna port.
The transmitting device according to any one of claims 1 to 13, wherein the processing module is further configured to: before the generating the reference signal,

Determining, according to the type of the synchronization source to which the transmitting device of the reference signal is synchronized and/or the moving speed of the transmitting device of the reference signal, the reference signal is the first type of reference signal.
The transmitting device according to claim 14, wherein

If the type of the synchronization source to which the transmitting device of the reference signal is synchronized is a synchronization source whose synchronization precision is lower than the precision threshold, or the moving speed of the transmitting device of the reference signal is higher than the moving speed threshold, determining that the reference signal is The first type of reference signal.
A receiving device for a reference signal, comprising:

a receiving module, configured to receive a reference signal;

a processing module, configured to perform signal processing on the reference signal received by the receiving module;

In the time domain, in each subframe occupied by the first type of reference signal, the first type of reference signal occupies at least five symbols, and two symbols in the at least five symbols are present. The inter-symbol spacing of the two symbols is no more than two symbols.
The receiving device according to claim 16, wherein in each time slot of the subframe, the first type of reference signal occupies at least two symbols,
The receiving device according to claim 16 or 17, wherein in the frequency domain, in each resource unit occupied by the first type of reference signal, the reference signal occupies a plurality of discontinuous subcarriers.
The receiving device according to any one of claims 16 to 18, wherein in the frequency domain, in each resource unit occupied by the first type of reference signal, the first type of reference signal occupies at least three Subcarriers.
The receiving device according to any one of claims 16 to 19, wherein in the time domain, the number of symbols occupied by the first reference signal in each subframe occupied by the first type of reference signal Less than the number of symbols in the sub-frame that can be used to transmit data.
The receiving device according to any one of claims 16 to 20, wherein in the time domain, in each time slot in each subframe occupied by the first type of reference signal, the reference signal Occupies multiple adjacent symbols.
A receiving device according to claim 21, wherein said first type of reference letter In each of the time slots occupied by the number, the first type of reference signals respectively occupy two sets of symbols, and each set of symbols includes adjacent multiple symbols.
A receiving device according to any one of claims 16 to 20, characterized in that

If the subframe occupied by the first type of reference signal is a normal CP subframe, the symbols occupied by the first type of reference signal in one slot of the occupied subframe include:

Symbol 0, symbol 1, symbol 4, symbol 5, or

Symbol 0, symbol 1, symbol 3, symbol 4, or

Symbol 1, symbol 2, symbol 4, symbol 5, or

Symbol 1, symbol 2, symbol 5, symbol 6;

If the subframe occupied by the first type of reference signal is a normal CP subframe, the symbols occupied by the first type of reference signal in one slot of the occupied subframe include:

Symbol 0, symbol 1, symbol 4, symbol 5, or

Symbol 0, symbol 1, symbol 3, symbol 4, or

Symbol 1, symbol 2, symbol 4, symbol 5, or

Symbol 0, symbol 2, symbol 3, symbol 5.
The receiving device according to any one of claims 16 to 23, wherein the subframe occupied by the first type of reference signal comprises: a synchronization subframe and/or an asynchronous subframe;

The synchronization subframe includes a synchronization signal, and the synchronization signal is not included in the asynchronous subframe.
A receiving device according to any one of claims 16 to 24, characterized in that

The transmitting device and the receiving device of the reference signal are both terminal devices; or

The sending device of the reference signal is a terminal device, and the receiving device is a network device;

The transmitting device of the reference signal is a network device, and the receiving device is a terminal device; or

The transmitting device and the receiving device of the reference signal are both network devices;
The receiving device according to claim 25, wherein the network device comprises a base station, and the terminal device comprises a user equipment UE or a roadside unit RSU.
The receiving device according to any one of claims 16 to 26, wherein in each subframe occupied by the first type of reference signal, the last symbol is a null symbol GAP.
The receiving device according to any one of claims 16 to 27, wherein the first type of reference signal is a reference signal transmitted by the same antenna port.
A device for transmitting power indication information, comprising:

a processing module, configured to acquire a first transmit power value of the first signal;

a sending module, configured to send first power indication information to the receiving device of the first signal when the first transmit power value acquired by the processing module is greater than a transmit power threshold, where the first power indication information is used Instructions:

The first transmit power value is greater than the transmit power threshold; or

a power deviation value between the first transmit power value and a second transmit power value of the second signal; or

a power deviation between the first transmit power value and the second transmit power value; or

The first transmit power value;

The first signal is used to carry data in a symbol that does not include a reference signal, and the second signal is the reference signal in a symbol including the reference signal in a subframe in which the first signal is located; or

The first signal is for carrying data in a symbol including the reference signal, and the second signal is the reference signal in the symbol.
The transmitting device according to claim 29, wherein the sending module is further configured to: after the processing module acquires a first transmit power value of the first signal in the subframe, if the first And transmitting, by the receiving device of the first signal, second power indication information, where the transmit power value is not greater than the transmit power threshold, where the second power indication information is used to indicate:

The first transmit power value is not greater than the transmit power threshold; or

There is no power deviation between the first transmit power value and the second transmit power value; or

The first transmit power value.
The transmitting device according to claim 29 or 30, wherein, if the first power indication information is used to indicate the power deviation value, the processing module is further configured to: in the first signal Before the receiving device sends the first power indication information, determining the power deviation value according to at least one of the following information:

Mapping the reference signal to a mapping manner on a physical resource;

a modulation mode of data in a subframe in which the reference signal is located;

a multi-carrier mode of data in a subframe in which the reference signal is located;

System bandwidth

The bandwidth occupied by the data in the subframe in which the reference signal is located.
A receiving device for power indication information, comprising:

a receiving module, configured to receive first power indication information that is sent by the sending device of the first signal, where the first power indication information is used to indicate that: the first transmit power value of the first signal is greater than the transmit power threshold; or a power deviation value between the first transmit power value and a second transmit power value of the second signal; or a power offset between the first transmit power value and the second transmit power value; or the a transmit power value;

a processing module, configured to determine, according to the first power indication information, that there is a power deviation between the first transmit power value and the second transmit power value of the second signal;

Determining the power deviation value, and demodulating data in the first signal or data in a subframe in which the first signal is located according to the determined power deviation value;

The first signal is used to carry data in a symbol that does not include a reference signal, and the second signal is the reference signal in a symbol that includes the reference signal in a subframe in which the first signal is located; or

The first signal is for carrying data in a symbol including the reference signal, and the second signal is the reference signal in the symbol.
The receiving device according to claim 32, wherein the processing module is specifically configured to: if the first power indication information is used to indicate the power deviation value,

Determining the power deviation value according to at least one of the following information: a mapping manner of the reference signal to a physical resource, a modulation mode of data in a subframe where the reference signal is located, and a subframe in which the reference signal is located The multi-carrier mode of the data, the system bandwidth, and the bandwidth occupied by the data in the subframe in which the reference signal is located.
A transmission power adjustment device, comprising:

a power value obtaining module, configured to acquire a first transmit power value of the first signal;

The first signal is used to carry data in a symbol that does not include a reference signal, and the second signal is the reference signal in a symbol including the reference signal in a subframe in which the first signal is located; or the a signal for carrying data in a symbol including the reference signal, the second signal being the reference signal in the symbol;

a power adjustment module, configured to: when the first transmit power value acquired by the power value acquisition module is greater than a transmit power threshold, perform power adjustment: reduce a transmit power of the first signal by a power adjustment amount, and The transmit power of the second signal decreases the power adjustment amount or keeps the transmit power of the second signal unchanged.
The device according to claim 34, wherein the power adjustment module is further configured to: determine the power adjustment amount according to at least one of the following information before performing the power adjustment:

a mapping manner of the reference signal to the physical resource, a modulation mode of the data in the subframe where the reference signal is located, a multi-carrier mode of the data in the subframe where the reference signal is located, a system bandwidth, and a subframe where the reference signal is located The bandwidth occupied by the data.
A transmitting device for a reference signal, comprising:

a processing module, configured to determine, according to a type of the synchronization source to which the sending device is synchronized and/or a moving speed of the transmitting device of the reference signal, the reference signal is the first type reference signal or the second type reference signal And generating the reference signal;

a sending module, configured to send the reference signal generated by the processing module;

The first type of reference signal occupies more symbols in one subframe than the second type of reference signal occupies in one subframe.
The transmitting device according to claim 36, wherein the processing module is specifically configured to:

If the type of the synchronization source to which the transmitting device of the reference signal is synchronized is a synchronization source whose synchronization precision is lower than the precision threshold, or the moving speed of the transmitting device of the reference signal is higher than the moving speed threshold, determining that the reference signal is The first type of reference signal;

If the type of the synchronization source to which the transmitting device of the reference signal is synchronized is not lower than the synchronization accuracy Determining the synchronization source of the precision threshold, and the moving speed of the transmitting device of the reference signal is not higher than the moving speed threshold, determining that the reference signal is the second type of reference signal.
A receiving device for a reference signal, comprising:

a processing module, configured to determine a type of the reference signal sent by a sending device of the reference signal, where the type of the reference signal includes: a first type of reference signal or a second type of reference signal;

a receiving module, configured to receive the reference signal according to a type of the reference signal determined by the processing module;

The processing module is further configured to: perform signal processing on the reference signal received by the receiving module;

The first type of reference signal occupies more symbols in one subframe than the second type of reference signal occupies in one subframe.
A method for transmitting a reference signal, comprising:

Generating a reference signal, the reference signal being a first type of reference signal;

Transmitting the generated reference signal;

In the time domain, in each subframe occupied by the first type of reference signal, the first type of reference signal occupies at least five symbols, and two symbols in the at least five symbols are present. The inter-symbol spacing of the two symbols is no more than two symbols.
The method of claim 39 wherein said first type of reference signal occupies at least two symbols in each time slot of said subframe.
A method according to claim 39 or 40, wherein

In the frequency domain, in each resource unit occupied by the first type of reference signal, the reference signal occupies a plurality of discontinuous subcarriers.
The method according to any one of claims 39 to 41, wherein in the frequency domain, in each resource unit occupied by the first type of reference signal, the first type of reference signal occupies at least three sub- Carrier.
The method according to any one of claims 39 to 42, wherein in the time domain, the number of symbols occupied by the first reference signal in each subframe occupied by the first type of reference signal Less than the number of symbols in the sub-frame that can be used to transmit data.
The method according to any one of claims 39 to 43, wherein in the time domain, the reference signal is occupied in each of each of the sub-frames occupied by the first type of reference signal Multiple symbols adjacent.
The method according to claim 44, wherein in each of the time slots occupied by the first type of reference signals, the first type of reference signals respectively occupy two sets of symbols, each A group symbol includes a plurality of adjacent symbols.
A method according to any one of claims 39 to 43 wherein

If the subframe occupied by the first type of reference signal is a normal CP subframe, the symbols occupied by the first type of reference signal in one slot of the occupied subframe include:

Symbol 0, symbol 1, symbol 4, symbol 5, or

Symbol 0, symbol 1, symbol 3, symbol 4, or

Symbol 1, symbol 2, symbol 4, symbol 5, or

Symbol 1, symbol 2, symbol 5, symbol 6;

If the subframe occupied by the first type of reference signal is a normal CP subframe, the symbols occupied by the first type of reference signal in one slot of the occupied subframe include:

Symbol 0, symbol 1, symbol 4, symbol 5, or

Symbol 0, symbol 1, symbol 3, symbol 4, or

Symbol 1, symbol 2, symbol 4, symbol 5, or

Symbol 0, symbol 2, symbol 3, symbol 5.
The method according to any one of claims 39 to 46, wherein the subframe occupied by the first type of reference signal comprises: a synchronization subframe and/or a non-synchronization subframe;

The synchronization subframe includes a synchronization signal, and the synchronization signal is not included in the asynchronous subframe.
A method according to any one of claims 39 to 47, wherein

The transmitting device and the receiving device of the reference signal are both terminal devices; or

The sending device of the reference signal is a terminal device, and the receiving device of the reference signal is a network device;

The transmitting device of the reference signal is a network device, and the receiving device of the reference signal is a terminal device; or

The transmitting device and the receiving device of the reference signal are both network devices;
The method of claim 48, wherein the network device comprises a base station, the terminal device comprising a user equipment UE or a roadside unit RSU.
The method according to any one of claims 39 to 49, wherein in each of the subframes occupied by the first type of reference signal, the last symbol is a null symbol GAP.
The method according to any one of claims 39 to 50, wherein the first type of reference signal is a reference signal transmitted by the same antenna port.
The method according to any one of claims 39 to 51, further comprising: before the generating the reference signal,

Determining, according to the type of the synchronization source to which the transmitting device of the reference signal is synchronized and/or the moving speed of the transmitting device of the reference signal, the reference signal is the first type of reference signal.
The method of claim 52, wherein

If the type of the synchronization source to which the transmitting device of the reference signal is synchronized is a synchronization source whose synchronization precision is lower than the precision threshold, or the moving speed of the transmitting device of the reference signal is higher than the moving speed threshold, determining that the reference signal is The first type of reference signal.
A method for receiving a reference signal, comprising:

Receiving a reference signal, the reference signal being a first type of reference signal;

Signal processing the received reference signal;

In the time domain, in each subframe occupied by the first type of reference signal, the first type of reference signal occupies at least five symbols, and two symbols in the at least five symbols are present. The inter-symbol spacing of the two symbols is no more than two symbols.
The method of claim 54 wherein said first type of reference signal occupies at least two symbols in each time slot of said subframe,
The method according to claim 54 or 55, wherein in the frequency domain, in each resource unit occupied by the first type of reference signal, the reference signal occupies a plurality of discontinuous Subcarrier.
The method according to any one of claims 54 to 56, wherein in the frequency domain, in each resource unit occupied by the first type of reference signal, the first type of reference signal occupies at least three sub- Carrier.
The method according to any one of claims 54 to 57, wherein in the time domain, in each subframe occupied by the first type of reference signal, the number of symbols occupied by the first reference signal is less than The number of symbols in the sub-frame that can be used to transfer data.
The method according to any one of claims 54 to 58, wherein in the time domain, the reference signal is occupied in each of each of the sub-frames occupied by the first type of reference signal Multiple symbols adjacent.
The method according to claim 59, wherein in each of the time slots occupied by the first type of reference signals, the first type of reference signals respectively occupy two sets of symbols, each A group symbol includes a plurality of adjacent symbols.
A method according to any one of claims 54 to 58, wherein

If the subframe occupied by the first type of reference signal is a normal CP subframe, the symbols occupied by the first type of reference signal in one slot of the occupied subframe include:

Symbol 0, symbol 1, symbol 4, symbol 5, or

Symbol 0, symbol 1, symbol 3, symbol 4, or

Symbol 1, symbol 2, symbol 4, symbol 5, or

Symbol 1, symbol 2, symbol 5, symbol 6;

If the subframe occupied by the first type of reference signal is a normal CP subframe, the symbols occupied by the first type of reference signal in one slot of the occupied subframe include:

Symbol 0, symbol 1, symbol 4, symbol 5, or

Symbol 0, symbol 1, symbol 3, symbol 4, or

Symbol 1, symbol 2, symbol 4, symbol 5, or

Symbol 0, symbol 2, symbol 3, symbol 5.
A method according to any one of claims 54 to 61, wherein said first type of ginseng The subframe occupied by the test signal includes: a synchronization subframe and/or an asynchronous subframe;

The synchronization subframe includes a synchronization signal, and the synchronization signal is not included in the asynchronous subframe.
A method according to any one of claims 54 to 62, wherein

The transmitting device and the receiving device of the reference signal are both terminal devices; or

The sending device of the reference signal is a terminal device, and the receiving device of the reference signal is a network device;

The transmitting device of the reference signal is a network device, and the receiving device of the reference signal is a terminal device; or

The transmitting device and the receiving device of the reference signal are both network devices;
The method according to claim 63, wherein said network device comprises a base station, said terminal device comprising a user equipment UE or a roadside unit RSU.
The method according to any one of claims 54 to 64, wherein in each of the subframes occupied by the first type of reference signal, the last symbol is a null symbol GAP.
The method according to any one of claims 54 to 65, wherein the first type of reference signal is a reference signal transmitted by the same antenna port.
A wireless communication system, comprising:

a sending device, configured to generate a reference signal, and send the generated reference signal;

a receiving device, configured to receive the reference signal sent by the sending device, and perform signal processing on the received reference signal;

The reference signal is a first type of reference signal;

In the time domain, in each subframe occupied by the first type of reference signal, the first type of reference signal occupies at least five symbols, and two symbols in the at least five symbols are present. The inter-symbol spacing of the two symbols is no more than two symbols.
A method for transmitting power indication information, comprising:

Obtaining a first transmit power value of the first signal;

If the obtained first transmit power value is greater than the transmit power threshold, send the first power indication information to the receiving device of the first signal, where the first power indication information is used to indicate:

The first transmit power value is greater than the transmit power threshold; or

a power deviation value between the first transmit power value and a second transmit power value of the second signal; or

a power deviation between the first transmit power value and the second transmit power value; or

The first transmit power value;

The first signal is used to carry data in a symbol that does not include a reference signal, and the second signal is the reference signal in a symbol including the reference signal in a subframe in which the first signal is located; or

The first signal is for carrying data in a symbol including the reference signal, and the second signal is the reference signal in the symbol.
The method according to claim 68, further comprising: after acquiring the first transmit power value of the first signal in the subframe, further comprising:

And if the obtained first transmit power value is not greater than the transmit power threshold, send, to the receiving device of the first signal, second power indication information, where the second power indication information is used to indicate:

The first transmit power value is not greater than the transmit power threshold; or

There is no power deviation between the first transmit power value and the second transmit power value; or

The first transmit power value.
The method according to claim 68 or 69, wherein, if the first power indication information is used to indicate the power deviation value, before transmitting the first power indication information to the receiving device of the first signal And further comprising: determining the power deviation value according to at least one of the following information:

Mapping the reference signal to a mapping manner on a physical resource;

a modulation mode of data in a subframe in which the reference signal is located;

a multi-carrier mode of data in a subframe in which the reference signal is located;

System bandwidth

The bandwidth occupied by the data in the subframe in which the reference signal is located.
A method for receiving power indication information, comprising:

First power indication information sent by the sending device receiving the first signal, the first power indication The information is used to indicate that a first transmit power value of the first signal is greater than the transmit power threshold; or a power offset value between the first transmit power value and a second transmit power value of the second signal; a power deviation between the first transmit power value and the second transmit power value; or the first transmit power value;

Determining, according to the first power indication information, that there is a power deviation between the first transmit power value and the second transmit power value of the second signal;

Determining the power deviation value, and demodulating data in the first signal or data in a subframe in which the first signal is located according to the determined power deviation value;

The first signal is used to carry data in a symbol that does not include a reference signal, and the second signal is the reference signal in a symbol that includes the reference signal in a subframe in which the first signal is located; or

The first signal is for carrying data in a symbol including the reference signal, and the second signal is the reference signal in the symbol.
The method of claim 71, wherein if the first power indication information is used to indicate the power deviation value, the determining the power deviation value comprises:

Determining the power deviation value according to at least one of the following information: a mapping manner of the reference signal to a physical resource, a modulation mode of data in a subframe where the reference signal is located, and a subframe in which the reference signal is located The multi-carrier mode of the data, the system bandwidth, and the bandwidth occupied by the data in the subframe in which the reference signal is located.
A wireless communication system, comprising:

The sending device is configured to: when the first transmit power value of the first signal is greater than the transmit power threshold, send the first power indication information to the receiving device, where the first power indication information is used to indicate that the first transmit power value is greater than a transmit power threshold; or a power offset value between the first transmit power value and a second transmit power value of the second signal; or between the first transmit power value and the second transmit power value Power deviation; or the first transmit power value;

The receiving device is configured to receive the first power indication information sent by the sending device, and determine, according to the first power indication information, the first transmit power value and the second signal Determining a power deviation between the transmit power values, and determining the power offset value, and demodulating data in the first signal or data in a subframe in which the first signal is located according to the determined power offset value;

The first signal is used to carry data in a symbol that does not include a reference signal, and the second signal is the reference signal in a symbol that includes the reference signal in a subframe in which the first signal is located; or

The first signal is for carrying data in a symbol including the reference signal, and the second signal is the reference signal in the symbol.
A method for adjusting a transmission power, comprising:

Obtaining a first transmit power value of the first signal;

The first signal is used to carry data in a symbol that does not include a reference signal, and the second signal is the reference signal in a symbol including the reference signal in a subframe in which the first signal is located; or

The first signal is used to carry data in a symbol including the reference signal, and the second signal is the reference signal in the symbol;

If the obtained first transmit power value is greater than the transmit power threshold, performing power adjustment: reducing a transmit power of the first signal by a power adjustment amount, and reducing a transmit power of the second signal by the The power adjustment amount or the transmission power of the second signal is kept constant.
The method of claim 74, wherein

Before performing the power adjustment, the method further includes: determining, according to at least one of the following information, the power adjustment amount: a mapping manner of the reference signal to a physical resource, and a data in a subframe where the reference signal is located The modulation mode, the multi-carrier mode of the data in the subframe in which the reference signal is located, the system bandwidth, and the bandwidth occupied by the data in the subframe in which the reference signal is located.
A method for transmitting a reference signal, comprising:

Determining, according to a type of the synchronization source to which the transmitting device of the reference signal is synchronized and/or a moving speed of the transmitting device of the reference signal, the reference signal is a first type of reference signal or a second type of reference signal;

Generating the reference signal;

Transmitting the generated reference signal;

The first type of reference signal occupies more symbols in one subframe than the second type of reference signal occupies in one subframe.
The method according to claim 76, wherein the reference signal is determined to be the first according to a type of a synchronization source to which the transmitting device of the reference signal is synchronized and/or a moving speed of the transmitting device of the reference signal Class reference signal or second type reference signal, including:

If the type of the synchronization source to which the transmitting device of the reference signal is synchronized is a synchronization source whose synchronization precision is lower than the precision threshold, or the moving speed of the transmitting device of the reference signal is higher than the moving speed threshold, determining that the reference signal is The first type of reference signal;

If the type of the synchronization source to which the transmitting device of the reference signal is synchronized is a synchronization source whose synchronization accuracy is not lower than the precision threshold, and the moving speed of the transmitting device of the reference signal is not higher than the moving speed threshold, then Determining the reference signal as the second type of reference signal.
A method for receiving a reference signal, comprising:

Determining a type of the reference signal sent by a transmitting device of the reference signal, the type of the reference signal comprising: a first type of reference signal or a second type of reference signal;

Receiving the reference signal according to the determined type of the reference signal;

Performing signal processing on the received reference signal;

The first type of reference signal occupies more symbols in one subframe than the second type of reference signal occupies in one subframe.
A wireless communication system, comprising:

a sending device, configured to determine, according to a type of the synchronization source to which the sending device is synchronized, and/or a moving speed of the sending device, a reference signal to be sent as a first type reference signal or a second type reference signal, to generate the Reference a signal and transmitting the generated reference signal;

a receiving device, configured to determine a type of the reference signal, and receive the reference signal according to the determined type of the reference signal, and perform signal processing on the received reference signal;

The first type of reference signal occupies more symbols in one subframe than the second type of reference signal occupies in one subframe.