CN108141425A

CN108141425A - A kind of transmission device of reference signal, method and system

Info

Publication number: CN108141425A
Application number: CN201580084122.6A
Authority: CN
Inventors: 黎超; 赵振山
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2015-11-05
Filing date: 2015-11-05
Publication date: 2018-06-08
Anticipated expiration: 2035-11-05
Also published as: CN111884963A; CN108141425B; CN111884963B; WO2017075789A1

Abstract

This application involves wireless communication technology field more particularly to a kind of transmission device of reference signal, method and system, there are during frequency departure, to ensure normal communication between communication equipment as possible between communication equipment.A kind of sending device that the application provides, including：Processing module, for generating reference signal, reference signal is first kind reference signal；Sending module, for the reference signal that processing module generates to be sent；Wherein, in the time domain, there are two symbols, the intersymbol interval of existing two symbols in each subframe occupied in first kind reference signal, in first kind reference signal at least five symbols of occupancy and at least five symbols to be not more than two symbols.In the case that the above-mentioned design of first kind reference signal can ensure that the exemplary frequency deviation values between the equipment being in communication with each other are larger, receiving device is by during the reference signal estimating frequency offset of above-mentioned design and making corresponding correction, so as to ensure the normal communication between equipment.

Description

A kind of transmission device of reference signal, method and system

Technical field

This application involves wireless communication technology field more particularly to a kind of transmission devices of reference signal, method and system.

Background technique

In wireless communication system, reference signal (Reference Signal, RS the receiving device of reference signal) is sent to by the sending device of reference signal, it can be used for channel estimation, signal demodulation, automatic growth control (Automatic Gain Control, AGC), signal quality measured, positioning, and channel detection, positioning etc., the receiving device of reference signal, which is known in advance, wants received reference signal, can be only achieved the purpose of the signal processings such as receiving device channel estimation in this way.

In a wireless communication system, the premise of mutual normal communication is between equipment: synchronous regime is between these equipment.But may cause can not precise synchronization between equipment for a variety of causes.

Such as: it is communicated between two vehicles, if on the two vehicle synchronous to two base stations, and synchronization is not carried out between the two base stations, there may be frequency departures when communicating in this way between the two vehicles, by taking the communication frequency between vehicle vehicle is 6GHz as an example, exemplary frequency deviation values between two vehicles may be up to 3~7kHz, and causing can not normal communication between them.

Summary of the invention

In view of this, the application provides a kind of transmission device of reference signal, method and system, there are when frequency departure, to guarantee normal communication between communication equipment as far as possible between communication equipment.

In a first aspect, the application provides a kind of sending device of reference signal, comprising:

Processing module, for generating reference signal, the reference signal is first kind reference signal；

Sending module, the reference signal for generating the processing module are sent；

Wherein, in the time domain, in each subframe that the first kind reference signal occupies, the first kind reference signal is occupied at least five symbols and at least five symbol there are two symbols, The intersymbol interval of existing described two symbols is not more than two symbols.

Second aspect, the application provide a kind of receiving device of reference signal, comprising:

Receiving module, for receiving reference signal；

Processing module, the reference signal for receiving to the receiving module carry out signal processing；

Wherein, in the time domain, in each subframe that the first kind reference signal occupies, the first kind reference signal occupies at least five symbols, and there are two symbols at least five symbol, the intersymbol interval of existing described two symbols is not more than two symbols.

The third aspect, the application provide a kind of sending method of reference signal, comprising:

Reference signal is generated, the reference signal is first kind reference signal；

The reference signal of generation is sent；

Fourth aspect, the application provide a kind of method of reseptance of reference signal, comprising:

Reference signal is received, reference signal is first kind reference signal；

Signal processing is carried out to the reference signal received；

5th aspect, the application provide a kind of wireless communication system, comprising:

Sending device sends the reference signal of generation for generating reference signal；

Receiving device, the reference signal sent for receiving the sending device, and signal processing is carried out to the received reference signal；

The reference signal is first kind reference signal；

In any of the above-described aspect, in order to guarantee the normal communication between the big communication equipment of frequency departure, the reference signal sent between communication equipment meets following condition:

In the time domain, reference signal is occupied in each subframe of occupancy there are two symbols at least five symbols and above-mentioned at least five symbol, and the intersymbol interval of the two symbols is not more than two symbols.

Wherein, reference signal occupies at least five symbols in each subframe of occupancy, it can guarantee that the receiving device of reference signal can obtain enough reference signal resources and carry out frequency offset estimation, and can also it guarantee in the case where communication equipment high-speed mobile, channel change fastly, more reference signals can be obtained in the unit time, thus more acurrate according to the result that reference signal carries out channel estimation.

Wherein, there are two symbols in above-mentioned at least five symbol, it is to guarantee correctly to estimate biggish exemplary frequency deviation values that the intersymbol interval of the two symbols, which is not more than two symbols,.Interval between two symbols comprising reference signal is bigger, and the exemplary frequency deviation values that the receiving device of reference signal can accurately be estimated are smaller.

Therefore, the above-mentioned design of reference signal can guarantee in the biggish situation of exemplary frequency deviation values between the equipment that is in communication with each other, when receiving device reference signal estimating frequency offset by above-mentioned design and corresponding correction be made, to guarantee the normal communication between equipment.

With reference to first aspect, the third aspect or the 5th aspect, in the first possible implementation, the sending device of reference signal is before generating the reference signal, the movement speed of the sending device of the type and/or reference signal for the synchronisation source being synchronized to according to the sending device of the reference signal determines that the reference signal is the first kind reference signal.

In the possible implementation, can according to the type of the synchronisation source of sending device and/or the movement speed of sending device, determine the type of reference signal, it can be achieved that flexible setting reference signal type.

In conjunction with the first above-mentioned possible implementation, in the second possible implementation,

If the type for the synchronisation source that the sending device of the reference signal is synchronized to is the synchronisation source that synchronization accuracy is lower than precision threshold, or the movement speed of the sending device of the reference signal is higher than movement speed threshold value, then the sending device of reference signal determines that the reference signal is the first kind reference signal.

In the possible implementation, when the synchronous synchronisation source precision of sending device is lower or the movement speed of sending device is higher, it may be determined that reference signal is first kind reference signal, since the first kind refers to Signal has biggish time domain density in the time domain, and receiving device can be larger according to the estimable exemplary frequency deviation values of first kind reference signal, therefore the receptivity of receiving device can be improved using first kind reference signal.

In conjunction in any possible implementation of any of the above-described aspect and either side, in the third possible implementation,

In each time slot of the subframe, the first kind reference signal occupies at least two symbols.

It ensure that receiving device can correctly estimate biggish exemplary frequency deviation values.Interval between two symbols comprising reference signal is bigger, and the exemplary frequency deviation values that the receiving device of reference signal can accurately be estimated are smaller.

In conjunction in any possible implementation of any of the above-described aspect and either side, in the fourth possible implementation,

On frequency domain, in each resource unit that the first kind reference signal occupies, the reference signal occupies discontinuous multiple subcarriers.

In each resource unit that reference signal occupies, reference signal occupies discontinuous multiple subcarriers, saves the physical resource of reference signal occupancy, improve data transfer efficiency, on frequency domain.

In conjunction in any possible implementation of any of the above-described aspect and either side, in a fifth possible implementation,

On frequency domain, in each resource unit that the first kind reference signal occupies, the first kind reference signal occupies at least three subcarriers.

Reference signal occupies at least three subcarrier, the selection of the value while the performance requirement for considering the requirement of reference signal density and channel estimation in time domain in a resource unit.

In conjunction with any of the above-described aspect, and in any possible implementation of either side, in a sixth possible implementation, in the time domain, in each subframe that the first kind reference signal occupies, the symbolic number that first reference signal occupies is less than the symbolic number that can be used for transmitting data in the subframe.

In conjunction with any of the above-described aspect, and in any possible implementation of either side, in the 7th kind of possible implementation, in the time domain, in each of each subframe that the first kind reference signal occupies time slot, the reference signal occupies adjacent multiple symbols.

As previously mentioned, the interval between two symbols comprising reference signal is bigger, the reception of reference signal The exemplary frequency deviation values that equipment can accurately be estimated are smaller, and therefore, in each of each subframe that reference signal occupies time slot, reference signal occupies adjacent multiple symbols, it is ensured that estimation performance of the receiving device to the exemplary frequency deviation values of each time slot.

In conjunction in above-mentioned 7th kind of possible implementation, in the 8th kind of possible implementation, in each of each subframe that the first kind reference signal occupies time slot, the first kind reference signal occupies two group codes respectively, and each group code includes adjacent multiple symbols.

It can guarantee receiving device in each time slot to the performance of exemplary frequency deviation values estimation in this way.And it can guarantee there is maximum frequency deviation value in any one time slot, and under the scene of communication equipment high-speed mobile, even if noise is relatively low, also there can be the performance of preferable channel estimation and exemplary frequency deviation values estimation, the symbolic number that reference signal occupies is more, receiving device is stronger to the rejection ability of noise when carrying out channel estimation, and the estimated capacity of exemplary frequency deviation values is stronger.

In conjunction with any one of any of the above-described aspect and first to the 6th kind of possible implementation of either side, in the 9th kind of possible implementation,

If the subframe that the first kind reference signal occupies is normal CP subframe, the symbol that the first kind reference signal occupies in a time slot in the subframe of occupancy includes:

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 conjunction in any possible implementation of any of the above-described aspect and either side, in the tenth kind of possible implementation,

The subframe that the first kind reference signal occupies includes: synchronous subframe and/or asynchronous subframe；Include synchronization signal in the synchronous subframe, does not include synchronization signal in the asynchronous subframe.

In conjunction in any possible implementation of any of the above-described aspect and either side, in a kind of the tenth possible implementation,

The receiving device of the sending device of the reference signal and the reference signal is terminal device；Or

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

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

The receiving device of the sending device of the reference signal and the reference signal is the network equipment；

In conjunction with a kind of the above-mentioned tenth possible implementation, in the 12nd kind of possible implementation, the network equipment includes base station, and the terminal device includes user equipment (UE) or roadside unit RSU.

In conjunction in any possible implementation of any of the above-described aspect and either side, in the 13rd kind of possible implementation,

In each subframe that the first kind reference signal occupies, last symbol is null symbol GAP.

In conjunction in any possible implementation of any of the above-described aspect and either side, in the 14th kind of possible implementation,

The first kind reference signal is the reference signal that the same antenna port is sent.

6th aspect, the application provide a kind of sending device of power indicative information, comprising:

Processing module, for obtaining the first transmission power level of the first signal；

Sending module, when first transmission power level for obtaining in the processing module is greater than transmission power threshold value, the receiving device of the first signal of Xiang Suoshu sends the first power indicative information, and first power indicative information is used to indicate:

First transmission power level is greater than the transmission power threshold value；Or

Power offset value between first transmission power level and the second transmission power level of second signal；Or

There are power deviations between first transmission power level and second transmission power level；Or

First transmission power level；

First signal includes data in the symbol of reference signal for carrying not, and the second signal is the reference signal in the symbol where first signal in subframe including the reference signal；Or

First signal is used to carry the data in the symbol including the reference signal, and the second signal is the reference signal in the symbol.

7th aspect, the application provide a kind of receiving device of power indicative information, comprising:

Receiving module, the first power indicative information that the sending device for receiving the first signal is sent, first power indicative information are used to indicate: the first transmission power level of first signal is greater than the transmission power threshold value；Or the power offset value between first transmission power level and the second transmission power level of second signal；Or there are power deviations between first transmission power level and second transmission power level；Or first transmission power level；

Processing module, for determining that there are power deviations between first transmission power level and the second transmission power level of second signal according to first power indicative information；

It determines the power offset value, and the data in data or first signal place subframe in first signal is demodulated according to the determining power offset value；

Wherein, first signal includes data in the symbol of reference signal for carrying not, and the second signal is the reference signal in the symbol where first signal in subframe including the reference signal；Or

Eighth aspect, the application provide a kind of sending method of power indicative information, comprising:

Obtain the first transmission power level of the first signal；

If first transmission power level obtained is greater than transmission power threshold value, the first power indicative information is sent to the receiving device of first signal, first power indicative information is used to indicate:

Power offset value between first transmission power level and the second transmission power level of second signal； Or

First transmission power level；

9th aspect, the application provide a kind of method of reseptance of power indicative information, comprising:

The first power indicative information that the sending device of the first signal is sent is received, first power indicative information is used to indicate: the first transmission power level of first signal is greater than the transmission power threshold value；Or the power offset value between first transmission power level and the second transmission power level of second signal；Or there are power deviations between first transmission power level and second transmission power level；Or first transmission power level；

According to first power indicative information, determine that there are power deviations between first transmission power level and the second transmission power level of second signal；

Tenth aspect, the application provide a kind of wireless communication system, comprising:

Sending device, when being greater than transmission power threshold value for the first transmission power level in the first signal, send the first power indicative information to receiving device, first power indicative information is used to indicate: first transmission power level is greater than the transmission power threshold value；Or the power offset value between first transmission power level and the second transmission power level of second signal；Or first transmission power level and described second emits There are power deviations between performance number；Or first transmission power level；

The receiving device, first power indicative information sent for receiving the sending device, and according to first power indicative information, determine that there are power deviations between first transmission power level and the second transmission power level of second signal, and determine the power offset value, and the data in data or first signal place subframe in first signal are demodulated according to the determining power offset value；

It is above-mentioned 6th aspect to the tenth aspect in either face, for papr (the Peak to Average Power Ratio of reference signal, PAPR) usually than problem caused by the PAPR high of data, the excessively high situation of the transmission power level of data to be sent is notified receiving device by sending device, after receiving device knows the situation, it is performed corresponding processing when solving adjusting data, to guarantee the performance of data demodulation.

In conjunction with it is above-mentioned 6th aspect to the tenth aspect in either face, in the first possible implementation, the sending device of first signal is when first transmission power level is not more than the transmission power threshold value, the second power indicative information is sent to the receiving device of the first signal, second power indicative information is used to indicate:

First transmission power level is not more than the transmission power threshold value；Or

Power deviation is not present between first transmission power level and second transmission power level；Or

First transmission power level.

In conjunction with the first possible implementation of above-mentioned 6th aspect face and either side either into the tenth aspect, in the second possible implementation,

The sending device or receiving device of first signal determine the power offset value according at least one in following message:

The reference signal is mapped to the mapping mode on physical resource；

The modulation system of data in the subframe of the reference signal place；

The multi-carrier mode of data in the subframe of the reference signal place；

System bandwidth；

The bandwidth that data occupy in subframe where the reference signal.

Tenth on the one hand, and the application provides a kind of transmission power adjustment equipment, comprising:

Performance number obtains module, for obtaining the first transmission power level of the first signal；

First signal includes data in the symbol of reference signal for carrying not, and the second signal is the reference signal in the symbol where first signal in subframe including the reference signal；Or first signal is used to carry the data in the symbol including the reference signal, the second signal is the reference signal in the symbol；

Power regulation module, for when the performance number obtains first transmission power level that module obtains and is greater than transmission power threshold value, it carries out following power adjustment: the transmission power of first signal being reduced into power adjustment, and the transmission power of the second signal is reduced into the power adjustment or keeps the transmission power of the second signal constant.

12nd aspect, the application provide a kind of transmission power adjustment method, comprising:

Obtain the first transmission power level of the first signal；

First signal is used to carry the data in the symbol including the reference signal, and the second signal is the reference signal in the symbol；

If first transmission power level obtained is greater than transmission power threshold value, it then carries out following power adjustment: the transmission power of first signal being reduced into power adjustment, and the transmission power of the second signal is reduced into the power adjustment or keeps the transmission power of the second signal constant.

The tenth one side of above-mentioned the application and the 12nd aspect, for reference signal PAPR usually than the problem caused by the PAPR high of data, sending device obtains the transmission power level of data to be sent, if the performance number obtained is excessively high, then carry out transmission power adjustment, it is saturated to avoid transmitter transmission power, from And guarantee the data demodulation performance of receiving device.

In conjunction with the above-mentioned tenth on the one hand or in terms of the 12nd, in the first possible implementation,

Sending device, according at least one in following message, determines the power adjustment before carrying out power adjustment:

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

13rd aspect, the application provide a kind of sending device of reference signal, comprising:

The movement speed of the sending device of processing module, the type of the synchronisation source for being synchronized to according to the sending device and/or the reference signal determines that the reference signal is the first kind reference signal or the second class reference signal；And generate the reference signal；

The symbolic number that the first kind reference signal occupies in a subframe is more than the symbolic number that the second class reference signal occupies in a subframe.

Fourteenth aspect, the application provide a kind of receiving device of reference signal,

Processing module, the type of the reference signal of the sending device transmission for determining reference signal, the type of the reference signal includes: first kind reference signal or the second class reference signal；

Receiving module, for reference signal described in the type reception according to the determining reference signal；

The processing module is also used to: the reference signal received to the receiving module carries out signal processing；

15th aspect, the application provide a kind of sending method of reference signal, comprising:

The movement speed of the sending device of the type and/or reference signal for the synchronisation source being synchronized to according to the sending device of reference signal determines that the reference signal is first kind reference signal or the second class reference signal；

Generate the reference signal；

The reference signal of generation is sent；

16th aspect, the application provide a kind of method of reseptance of reference signal,

Determine the type for the reference signal that the sending device of reference signal is sent, the type of the reference signal includes: first kind reference signal or the second class reference signal；

Reference signal described in type reception according to the determining reference signal；

Signal processing is carried out to the received reference signal；

17th aspect, the application provide a kind of wireless communication system, comprising:

Sending device, the movement speed of the type of synchronisation source for being synchronized to according to the sending device and/or the sending device, it determines that reference signal to be sent is first kind reference signal or the second class reference signal, generates the reference signal, and the reference signal of generation is sent；

Receiving device for determining the type of the reference signal, and according to reference signal described in the type reception of the determining reference signal, and carries out signal processing to the received reference signal；

In conjunction with it is above-mentioned 13rd aspect to the 15th aspect in either face, in the first possible implementation, the processing module is specifically used for:

If the type for the synchronisation source that the sending device of the reference signal is synchronized to is the synchronisation source that synchronization accuracy is lower than precision threshold, or the movement speed of the sending device of the reference signal is higher than movement speed threshold value, it is determined that the reference signal is the first kind reference signal；

If the type for the synchronisation source that the sending device of the reference signal is synchronized to is the synchronisation source that synchronization accuracy is not less than the precision threshold, and the movement speed of the sending device of the reference signal is not higher than the movement speed threshold value, it is determined that the reference signal is the second class reference signal.

In the possible implementation, when the synchronous synchronisation source precision of sending device is lower, or sending device movement speed it is higher when, it can determine that reference signal is first kind reference signal, since first kind reference signal has biggish time domain density in the time domain, and receiving device can be larger according to the estimable exemplary frequency deviation values of first kind reference signal, therefore the receptivity of receiving device can be improved using first kind reference signal.

Detailed description of the invention

Fig. 1 be current long term evolution (Long Term Evolution, LTE) system in, including demodulated reference signal (DeModulation Reference Signal, DMRS) symbol subframe schematic diagram；

Fig. 2 is the schematic diagram of transmission power saturation；

Fig. 3 A is a kind of schematic diagram of the framework for the wireless communication system that the application is applicable in；

Fig. 3 B is the schematic diagram of another framework for the wireless communication system that the application is applicable in；

Fig. 3 C is a kind of schematic diagram of the framework for the car networking system that the application is applicable in；

Fig. 4 be include synchronisation source car networking system configuration diagram；

Fig. 5 is the structural schematic diagram for the wireless communication system that the embodiment of the present application one provides；

Fig. 6 is in the embodiment of the present application one, and sending device generates and sends the schematic diagram of the optional process of reference signal；

Fig. 7 is in the embodiment of the present application one, and receiving device receives and processes the schematic diagram of the optional process of reference signal；

Fig. 8 A~Fig. 8 P is the schematic diagram for the optional mapping mode of reference signal that the embodiment of the present application two provides；

Fig. 9 A~Fig. 9 D is the schematic diagram for the optional mapping mode of reference signal that the embodiment of the present application three provides；

The flow chart of interaction flow of the Figure 10 between the sending device provided of the embodiment of the present application four and receiving device；

Figure 11 is the flow chart for the sending device process flow that the embodiment of the present application five provides；

The flow chart of interaction flow of the Figure 12 between the sending device provided of the embodiment of the present application six and receiving device；

Figure 13 is the structural schematic diagram for the first reference signal sending device that the embodiment of the present application seven provides；

Figure 14 is the structural schematic diagram for second of reference signal sending device that the embodiment of the present application eight provides；

Figure 15 is the structural schematic diagram for the first reference signal receiving device that the embodiment of the present application nine provides；

Figure 16 is the structural schematic diagram for the first reference signal receiving device that the embodiment of the present application ten provides；

Figure 17 is the structural schematic diagram of the sending device for the first power indicative information that the embodiment of the present application 11 provides；

Figure 18 is the structural schematic diagram of the sending device for second of power indicative information that the embodiment of the present application 12 provides；

Figure 19 is the structural schematic diagram of the receiving device for the first power indicative information that the embodiment of the present application 13 provides；

Figure 20 is the structural schematic diagram of the receiving device for second of power indicative information that the embodiment of the present application 14 provides；

Figure 21 is the structural schematic diagram that the first transmission power that the embodiment of the present application 15 provides adjusts equipment；

Figure 22 is the structural schematic diagram for second of the transmission power adjustment equipment that the embodiment of the present application 16 provides；

Figure 23 is the structural schematic diagram for the third reference signal sending device that the embodiment of the present application 17 provides；

Figure 24 is the structural schematic diagram for the third reference signal receiving device that the embodiment of the present application 18 provides；

Figure 25 is the flow chart for the first reference signal sending method that the embodiment of the present application 19 provides；

Figure 26 is the flow chart for the first reference signal receiving method that the embodiment of the present application 20 provides；

Figure 27 is the flow chart of the sending method for the power indicative information that the embodiment of the present application 21 provides；

Figure 28 is the flow chart of the method for reseptance for the power indicative information that the embodiment of the present application 22 provides；

Figure 29 is the flow chart for the transmission power adjustment method that the embodiment of the present application 23 provides；

Figure 30 is the flow chart for second of reference signal sending method that the embodiment of the present application 24 provides；

Figure 31 is the flow chart for the transmission power adjustment method that the embodiment of the present application 25 provides；

Figure 32 is the flow chart for second of reference signal sending method that the embodiment of the present application 26 provides；

Figure 33 is the flow chart for second of reference signal receiving method that the embodiment of the present application 27 provides.

Specific embodiment

The above-mentioned purpose of the application, scheme and advantage in order to better understand, provided hereinafter detailed descriptions.The detailed description illustrates the various embodiments of device and/or method by using the attached drawings such as block diagram, flow chart and/or example.It include one or more functions and/or operation in these block diagrams, flow chart and/or example.It will be understood by the skilled person that: each function and/or operation in these block diagrams, flow chart or example can separately or cooperatively be implemented by various hardware, software, firmware, or be implemented by any combination of hardware, software and firmware.

In the application, on the one hand, in order to guarantee the normal communication between the big communication equipment of frequency departure, the reference signal sent between communication equipment meets following condition:

In the application, on the other hand, due to papr (the Peak to Average Power Ratio of reference signal, PAPR) usually than the PAPR high of data, when the transmission power of transmitter saturation, such as, assuming that maximum saturation power is 23dBm, the transmission power of reference signal and data is all 23dBm, because the PAPR of reference signal is than the 3dB that is higher by of data, then the actually effective transmission power of reference signal Only 23-3=20dBm.Effective transmission power i.e. in actual reference signal can a predefined value lower than effective power in data, the higher PAPR value of reference signal can reduce the efficiency of radio-frequency devices, cause the power of the power ratio data of reference signal low, amplitude is modulated, receiving device can not correctly reflect the characteristic of channel due to the reference signal for being truncated peak value received, the channel estimation results inaccuracy of receiving device, so as to cause data demodulation error.

For reference signal papr (Peak to Average Power Ratio, PAPR) usually than the problem caused by the PAPR high of data, the solution including following two schemes provided herein:

Solution one, sending device obtain the transmission power level of data to be sent, if the performance number obtained is excessively high, the excessively high situation of performance number is notified into receiving device, after receiving device knows the situation, it is performed corresponding processing when solving adjusting data, to guarantee the performance of data demodulation.

Solution two, sending device obtain the transmission power level of data to be sent, if the performance number obtained is excessively high, carry out transmission power adjustment, to avoid transmitter transmission power saturation, to guarantee the data demodulation performance of receiving device.

In the application, in another aspect, providing a kind of transmission scheme of reference signal, the type of reference signal can flexibly be determined according to the synchronization Source Type that sending device is synchronized to and/or the movement speed of sending device.

In the following, in order to make it easy to understand, introduce this application involves basic conception.

In order to facilitate understanding, with long term evolution (Long Term Evolution, LTE it) is introduced for system, but this does not imply that the application is only applicable to LTE system, in fact, any transmission reference signal, can use reference signal transmission scheme provided by the present application, with solve the problems, such as it is above-mentioned refer to, and achieve the effect that above-mentioned refer to.

One, the data transmission in LTE system

In LTE system, downlink transfer, the i.e. access network equipment of such as base station are transmitted to UE, are the multi-access modes based on orthogonal frequency division multiplexing multiple access (Orthogonal Frequency Division Multiplexing Access, OFDMA)；Uplink, i.e. UE to access network equipment transmit, be based on single carrier frequency division multiplexing multiple access (Single Carrier-Frequency Division Multiplexing Access, SC-FDMA multi-access mode).

For downlink transfer, running time-frequency resource is divided into the subcarrier in the OFDM symbol in time-domain dimension and frequency domain dimension；For uplink, running time-frequency resource is divided into the SC-FDM symbol in frequency domain dimension.In the application, symbol can not limit this for the symbol under OFDM symbol or SC-FDM symbol or other multi-access modes, the application.

In LTE system, the smallest resource granularity is referred to as resource unit (Resource Element, RE), i.e. the time-frequency lattice point of a sub- carrier wave composition in a time-domain symbol and frequency domain in expression time-domain.

In general, the basic time unit of access network equipment scheduling is a subframe, a subframe includes multiple time-domain symbols.Alternatively, some scenes for requiring diminution propagation delay time, the basic time unit of access network equipment scheduling can be one or more time-domain symbols.A when a length of predefined length for the occupancy of subframe, is the basic unit for occupying resource when once transmitting in the time domain.By taking LTE system as an example, the when a length of 1ms that a current subframe occupies, but the duration that the application occupies subframe is not limited to duration as defined in current LTE protocol, it can be other duration values, such as 0.5ms, 0.2ms, 0.1ms.In multi-carrier systems, the duration of a subframe is usually related with subcarrier spacing, and subcarrier spacing is bigger, and the duration that subframe occupies is usually shorter.In short, in this application, a subframe occupies the basic unit of resource in the time domain when referring to once transmitting, its length in the time domain is predefined.

In LTE system, a subframe is divided into including 2 time slots, includes several symbols in a time slot.

In LTE system, subframe can be divided into synchronous subframe and asynchronous subframe, wherein include synchronization signal in synchronous subframe, do not include synchronization signal in asynchronous subframe.

In LTE system, signal (including data and/or reference signal) can be sent by one or more antenna ports.Antenna port is the logic port communicated between sending device and receiving device, and for the signal of same antenna port transmitting, receiving device is when receiving signal, it is believed that signal is emitted from same root physical antenna.

The corresponding determining physical antenna of a usual antenna port, but when actual system is realized, one antenna port can also correspond to multiple and different physical antennas with same emissive properties, such as: the antenna radiation pattern of these physical antennas is identical, for another example: the physical distance between these physical antennas is close. In short, communication link of these the different physical antennas of sending device to receiving device, receiving device side be regarded as same root physical antenna to receiving device communication link.

LTE system supports frequency division duplex (Frequency Duplexing Division, FDD) and two kinds of duplex modes of time division duplex (Time Duplexing Division, TDD).For the LTE system using FDD duplex mode, abbreviation FDD LTE system, downlink transfer and uplink use different carrier waves.It specifically include downlink subframe, sub-frame of uplink and special subframe on a carrier wave for the LTE system of TDD duplex mode, abbreviation TDD LTE system, uplink and downlink transfer using the different time of same carrier wave.

Wherein, it include descending pilot frequency time slot (Downlink Pilot Time Slot in special subframe; DwPTS); guard time (Guard Period;) and uplink pilot time slot (Uplink Pilot Time Slot GP; UpPTS) three parts, wherein GP is mainly used for the device conversion time and the compensation of propagation delay of downstream-to-upstream.In addition, downlink data can be transmitted in DwPTS, but PUSCH cannot being transmitted in UpPTS, therefore being said from the angle, special subframe is considered as downlink subframe.

In this application, related symbol is each time-domain symbol referred under specific multi-carrier modulation scheme, in the embodiment of the present invention, symbol can be orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) symbol or single carrier frequency division are multiplexed (Single Carrier Frequency Division Multiplexing, symbol under SC-FDMA symbol or other multi-access modes, it is not limited in the embodiment of the present invention.It then include multiple subcarriers in each symbol if it is frequency division multi-carrier modulation；Divide multi-carrier modulation if it is code, then may include the channel of multiple codes point in each symbol.

Two, PRB, the interval of subcarrier and symbol lengths

In LTE system, when carrying out data transmission, uplink and downlink running time-frequency resource is formed into PRB, is scheduled and distributes as physical resource unit.At present in LTE system, a PRB includes 12 continuous subcarriers on frequency domain.At present in LTE system, 15kHz, i.e., the interval between the center frequency point of two adjacent subcarriers are divided between subcarrier.

Three, reference signal

As previously mentioned, receiving device reference signal can carry out channel estimation, signal demodulation, AGC, signal quality measured, positioning and channel detection, positioning etc. based on the received.

But since data transmission resources are limited, when data transmission resources, which are referenced signal, to be occupied, data cannot be used for transmission, data transmission efficiency can be reduced in this way.Therefore, for wireless communication system in design, the resource that can control reference signal occupancy minimizes the occupancy of reference signal under the premise of guaranteeing communication quality, to reduce expense of the reference signal in system resource, thus improve data transfer efficiency.

By taking demodulated reference signal (DeModulation Reference Signal, DMRS) as an example, at present in LTE system, receiving device demodulates the data received according to the DMRS received.Currently, there are 1 DMRS symbols in every 0.5ms time slot, symbol Sym4, DMRS as shown in figure 1 occupies the continuous subcarrier in DMRS symbol.In Fig. 1, cyclic prefix (Cyclic Prefix, CP) is added in front of each symbol, for eliminating intersymbol interference (Inter Symbol Interference, ISI).Sym0~Sym6 indicates that symbol symbol 0 in one time slot arrives symbol 6, wherein plus the Sym4 of shade indicate the symbol for being used as DMRS.

Reference signal as defined in the current agreement such as DMRS shown in FIG. 1 is unable to satisfy the requirement of normal communication between sending device and receiving device under certain wireless communication scenes.

Such as: under the scene of communication equipment high-speed mobile, relative moving speed between sending device and receiving device is larger, channel rapid fading is serious, and in Fig. 1, there is only 1 DMRS symbols in each 0.5ms time slot, then receiving device can not obtain more reference signals in the unit time to carry out accurate channel estimation.Since the density of DMRS symbol in the time domain is not big enough, lead to receiving device channel estimation results inaccuracy under high-speed mobile scene.

Therefore, in the application, reference signal as defined in current agreement is redesigned, such as: increase time domain density, reference can be made to reference signal shown in Fig. 8 A~Fig. 8 P, Fig. 9 A~Fig. 9 D, to meet the requirement of the channel estimation under high-speed mobile scene.

These reference signals can be described as " reference signal of enhancing ", or be " first kind reference signal "；And reference signal as defined in current agreement is known as " common reference signal ", or be " the second class reference signal ".Compared with these reference signals reference signal as defined in the current agreement, the symbolic number in a subframe of occupancy is more.

Optionally, on frequency domain, these reference signals can occupy subcarrier continuously or discontinuously, if accounting for With discrete subcarrier, then other subcarriers for not being referenced signal occupancy can be used for transmitting data, to guarantee data transmission efficiency.

In addition, receiving device needs accurately to estimate exemplary frequency deviation values, use reference signal such as shown in FIG. 1, receiving device can not accurately estimate biggish exemplary frequency deviation values there are when biggish frequency departure between communication equipment in order to be properly received.

Therefore, in the application, first kind reference signal can further satisfaction: reference signal occupies at least four symbols in a subframe, and in four symbols, at least there are two symbols, the intersymbol interval of the two symbols is not more than two symbols, to meet the requirement that receiving device accurately estimates larger exemplary frequency deviation values.

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

Four, CP

At present in LTE system, CP is there are two types of type, and there are three types of numerical value for CP length.

CP type is divided into normal (normal) CP and extension (extended) CP.

By taking the system bandwidth of 20MHz as an example, when using normal CP, the 1st symbol of each time slot, the number of samples that Sym0 as shown in figure 1 is occupied is 160, the corresponding duration occupied is about 5.2 microseconds, and the number of samples that other symbols in 1ms subframe occupy is 144, and the corresponding duration occupied is about 4.7 microseconds.When using normal CP, at present in LTE system, 14 symbols are shared in a subframe.When using extension CP, the CP length of each symbol is mutually all 512 sampling points, and the corresponding duration occupied is about 16.7 microseconds.In current LTE system, 12 symbols are shared in the subframe of an extension CP.

Five, the relationship between the exemplary frequency deviation values that the interval between the symbol where reference signal and receiving device can estimate

By largely emulating and testing discovery, the exemplary frequency deviation values that the interval between two symbols comprising reference signal is bigger, and the receiving device of reference signal can accurately be estimated are smaller.

Such as: in the existing LTE system based on multi-carrier modulation, if subcarrier spacing on each symbol is Δ f, and include it is adjacent between two symbols of reference signal, then receiving device is up to Δ f according to the exemplary frequency deviation values that the reference signal in the two adjacent-symbols can estimate；

If be divided into 2 symbols between two symbols comprising reference signal (has among two symbols And an only symbol), then receiving device is maximum Δ f/2 according to the exemplary frequency deviation values that the reference signal in the two symbols can estimate；

If being divided into 3 symbols (have among two symbols and only there are two symbols) between two symbols comprising reference signal, receiving device is maximum Δ f/3 according to the exemplary frequency deviation values that the reference signal in the two symbols can estimate.

Such as: Δ f=15kHz value, if exemplary frequency deviation values are 7k, between two symbols comprising reference signal between be divided into 3 or more symbols and cannot estimate the exemplary frequency deviation values.When being divided into 3 symbols between two symbols comprising reference signal, it is only capable of estimating the frequency departure of 5kHz, interval is bigger, and the exemplary frequency deviation values that can be estimated are smaller.

Six, PAPR

The PAPR of reference signal is higher than data, therefore in sending device side, if the transmission power of transmitter enters zone of saturation, then because of the higher PAPR value of the generation of reference signal, influence whether the power amplification efficiency of radio-frequency devices, the actually active transmission power of reference signal is caused to be lowered in this way, and then higher than the actually active transmission power of reference signal by data transmission power after radio-frequency devices.

With reference to Fig. 2, signal A is identical as the saturation value of signal B, is all such as Pmax, when the transmission power of signal A and signal B are all Pmax, because the PAPR of signal B is higher, this higher PAPR value corresponds to the power reduction values of P_down dB.Its meaning are as follows: if signal A is identical with the transmission power of signal B when all reaching saturation value, first, the transmission power level of signal B be all Pmax.But the actually active transmission power level of the first transmitting signal is Pmax, and signal B is because there is the influence of PAPR, and effective transmission power value is Pmax-P_down.

That is:

If Pt1≤Pmax-P_down, and Pt2≤Pmax-P_down, then when Pt1=Pt2, the deviation of the not no transmission power of the two, Pt1, Pt2 are respectively the transmission power level of signal A and the transmission power level of signal B；

If Pmax-P_down < Pt1 < Pmax, Pmax-P_down < Pt2 < Pmax, then signal B Transmission power be Pmax, and its effective transmission power is Pmax-P_down, and the transmission power level of signal A is Pt1, and it will be a value related with transmission power that the transmission power deviation between signal A and signal B, which is Pt1-Pmax+P_down, at this time.

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

And receiving device is not aware that whether the transmission power of sending device enters zone of saturation, and if into zone of saturation, when entering zone of saturation.When the data of transmission are modulated using amplitude, such as 16 quadrature amplitude modulation (Quadrature Amplitude Modulation, QAM), whens 64QAM, 128QAM, 256QAM etc., when carrying out data demodulation mistake will occur for receiving device, because being multiplied by a unknown range value in the constellation point finally estimated, this value can be carried out constellation " stretching " or " compression ".By taking 16QAM as an example, if signal is compressed, receiving device possibly can not identify compressed after correspond to different range values 16 kinds of possible constellation points position, to generate the mistake of demodulation.

It makes a concrete analysis of as follows:

If the transmission power of the transmitter of sending device enters zone of saturation, since reference signal has bigger PAPR, transmission power Δ dB smaller than data transmission power.

Assuming that the reference signal that the transmitter of sending device issues is Xs, it is H by the domain channel response of channel, then the reference signal that the receiver of receiving device receives can indicate are as follows:

Ys=As*H*Xs；

Wherein, As=sqrt (Ps), the i.e. evolution of reference signal transmission power level Ps；

Receiving device is Hest=As*H by the available channel estimation value of channel estimation；

Assuming that the characteristic of channel for sending the channel of reference signal is identical as the channel of data is sent, corresponding, the data that receiving device receives are as follows:

Yd=Ad*H*Xd；

Wherein, Xd is the signal of the data of the transmitter sending of sending device, the evolution of Ad=sqrt (Pd) the i.e. transmission power level Pd of data；

By the equilibrium of the receiver of receiving device, the estimated value of available data are as follows:

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

Wherein, Pd and Ps is that the transmitter of sending device is passing through radio frequency (Radio Frequency, RF) in the effective transmission power for the corresponding transmitting signal of power for eating dishes without rice or wine to emit after device, the size of ratio a=Ad/As, a value is a=10^ (Δ/20).

Therefore, there is a fixed ratio between the amplitude of the practical data sent of the data and sending device that receiving device is estimated.

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

For receiving device, if it is not known that this value, when data use the modulation system with amplitude, such as ASK, QAM modulation etc., then demodulation decoding error can occur for receiving device.

Six, the framework for the wireless communication system that the application is applicable in, terminal, access network equipment

The application is applicable to the framework of terminal device-access network equipment wireless communication system shown in Fig. 3 A, wherein reference signal can be sent by terminal device, and access network equipment receives；It can also be sent by access network equipment, terminal receives.

The application is equally applicable to the framework of terminal device-terminal device wireless communication system shown in Fig. 3 B, such as: device-to-device (Device-to-Device, D2D) in system, wherein, one terminal device sends reference signal, other terminal devices receive reference signal, and reference signal carries out channel estimation etc. based on the received.

The application also can be used in the car networking system shown in Fig. 3 C, and wherein the reference signal transmission mode between terminal device is similar to the transmission mode in above-mentioned D2D system, and which is not described herein again.Wherein, reference signal can also be transmitted between drive test unit (Road Side Unit, RSU) and terminal device, such as: RSU sends reference signal, and terminal device receives reference signal or terminal device sends reference signal, and RSU receives reference signal；In addition, reference signal can also be transmitted between RSU and base station, and such as: RSU sends reference signal, and base station receives reference signal or base station sends reference signal, and RSU receives reference signal.Here, RSU and base station can be considered access network equipment, in addition, RSU also can be considered a kind of terminal device.

It should be noted that terminal device can be mobile unit when the application is applied to car networking system, RSU can be communicated with mobile unit and/or base station communication, base station with mobile unit and/or RSU.Mobile unit is mobile with vehicle high-speed, when relative motion between two mobile units, has biggish relative moving speed.The frequency spectrum of cellular link can be used in communication between above-mentioned mobile unit, RSU and base station, and the intelligent transportation frequency spectrum near 5.9GHz also can be used.

Fig. 4 shows a kind of car networking system including synchronisation source.As shown in figure 4, including: in the car networking system

Multiple mobile units (terminal device 1, terminal device 2, terminal device 3 and terminal device 4) can be in communication with each other between mobile unit, the communication being also possible between vehicle and people；

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

Multiple satellite synchronization sources, such as: Global Navigation Satellite System (Global Navigation Satellite System, it GNSS), here include satellite synchronization source 1 and satellite synchronization source 2, multiple satellite synchronization sources can be country variant, the satellite of different systems.

In car networking system shown in Fig. 4, terminal device 1, terminal device 2, terminal device 3 and terminal device 4 can be synchronized on different types of synchronisation source, these synchronisation sources include: base station, GNSS and GNSS equivalent synchronisation source.If different terminal devices is synchronized to different synchronisation sources, such as different base stations, and on these base station synchronizations to different synchronisation sources, then there may be biggish exemplary frequency deviation values between these terminal devices.Such as: terminal device 1 is synchronized to base station 1, and terminal device 2 is synchronized to base station 2, and does not synchronize between base station 1 and base station 2, then exemplary frequency deviation values maximum when directly being communicated between terminal device 1 and terminal device 2 can achieve 7kHz.

In addition, the terminal device in the application can be wireless terminal, wireless terminal can be directed to user and provide the equipment of voice and/or data connectivity, have the handheld device of wireless connecting function or be connected to other processing equipments of radio modem.Wireless terminal can through wireless access network (such as, RAN, Radio Access Network) it is communicated with one or more core nets, wireless terminal can be mobile terminal, such as mobile phone (or be " honeycomb " phone) and the computer with mobile terminal, for example, it may be portable, pocket, hand-held, built-in computer or vehicle-mounted mobile device, they exchange language and/or data with wireless access network.For example, personal communication service (PCS, Personal Communication Service) phone, wireless phone, Session initiation Protocol (SIP) phone, wireless The equipment such as local loop (WLL, Wireless Local Loop) stands, personal digital assistant (PDA, Personal Digital Assistant).Wireless terminal is referred to as system, subscriber unit (Subscriber Unit), subscriber station (Subscriber Station), movement station (Mobile Station), mobile station (Mobile), distant station (Remote Station), access point (Access Point), remote terminal (Remote Terminal), access terminal (Access Terminal), user terminal (User Terminal), user agent (User Agent), user equipment (User Device), or user equipment (User Equipment).

Access network equipment provided by the present application may include base station, or for the wireless resource management equipment of control base station, or including base station and for the wireless resource management equipment of control base station；Access network equipment can be macro station or small station, can also be RSU above-mentioned.

Seven, the communication standard for the wireless communication system that the application is applicable in

The communication standard of various wireless communication systems provided by the present application includes but is not limited to: global system for mobile communications (Global System of Mobile communication, GSM), CDMA (Code Division Multiple Access, CDMA) IS-95, CDMA (Code Division Multiple Access, CDMA) 2000, TD SDMA (Time Division-Synchronous Code Division Multiple Access, TD-SCDMA), wideband code division multiple access (Wideb And Code Division Multiple Access, WCDMA), time division duplex-long term evolution (Time Division Duplexing-Long Term Evolution, TDD LTE), frequency division duplex-long term evolution (Frequency Division Duplexing-Long Term Evolution, FDD LTE), long term evolution-enhancing (Long Term Evolution-Advanced, LTE-advanced), personal handyphone system (Personal Handy-phone Sys Tem, PHS), Wireless Fidelity (Wireless Fidelity as defined in 802.11 serial protocols, WiFi), worldwide interoperability for microwave accesses (Worldwide Interoperability for Microwave Access,), and the various wireless communication systems of the following evolution WiMAX.

In fact, any transmission reference signal can use reference signal transmission scheme provided by the present application to realize that receiving device is properly received data radio communication system.

Eight, other explanations

In addition, the terms " system " and " network " are often used interchangeably herein.The terms "and/or", only a kind of incidence relation for describing affiliated partner, indicates may exist three kinds of relationships, example Such as, A and/or B can be indicated: individualism A, exist simultaneously A and B, these three situations of individualism B.In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".

More than, describe this application involves basic conception, in order to make it easy to understand, the attached drawing for listing present embodiments in following table 1, being related to.

Table 1

[embodiment one]

As shown in Figure 5, the wireless communication system that embodiment one provides includes: the sending device 501 of reference signal and the receiving device 502 of reference signal, it is succinct in order to describe, it is known as " sending device 501 " below with reference to the sending device 501 of signal, the receiving device 502 of reference signal is known as " receiving device 502 ".

Wherein, sending device 501 is for determining reference signal, and determining reference signal is sent；

Receiving device 502 is handled received reference signal for receiving reference signal, such as: reference signal carries out channel estimation, signal demodulation, AGC, wireless measurement and channel detection etc. based on the received.

Fig. 6 shows the optional process that sending device 501 generates and sends reference signal.

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

S601: sending device 501 generates reference signal sequence；

S602: sending device 501 generates data symbol to be sent, these data symbols are to be sent The constellation symbol that coded data packet to be sent generates after ovennodulation；

S603: reference signal sequence is mapped on physical resource by the determination of sending device 501；

S604: reference signal and the data to be sent of generation are mapped to the parameter of physical resource according to reference signal sequence to map by sending device 501, are then done after multi-carrier modulation increases the operation such as protection interval and are formed data burst to be sent；

S605: sending device 501 sends the data burst of formation.

Fig. 7 shows the optional process that receiving device 502 receives reference signal.

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

S711: receiving device 502 generates local reference signal sequence；

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

S713: receiving device 502 carries out signal processing to the reference signal received according to the local reference signal sequence that determining mapping mode generates.

There are many kinds of the modes of signal processing, it include: that channel estimation is done to the reference signal received to obtain the channel quality information in the bandwidth of reference signal place, and/or Data Detection is done to the reference signal and data to be received that receive, to obtain data to be received.

In the application, reference signal can be to be previously described for channel estimation, signal demodulation, automatic growth control (Automatic Gain Control, AGC), signal quality measured, positioning and channel detection, any reference signal positioned etc..Such as: DMRS, the reference signal etc. for AGC.

In the application, for reference signal sequence for generating reference signal in a subframe, in sequence a symbol corresponds to a subcarrier in the symbol that reference signal occupies in a subframe.

Reference signal transmission scheme and reference signal reception scheme in embodiment one are applicable to each embodiment below.

More than, reference signal provided by the present application is described by embodiment one and sends and receives scheme.In the following, being introduced in the application by embodiment two and embodiment three, reference signal is mapped to the various optional implementations of subframe.Wherein, embodiment two provides the optional mapping mode that reference signal is mapped to asynchronous subframe, and various optional mapping modes can refer to Fig. 8 A~Fig. 8 P；Embodiment three provides reference signal mapping To the optional mapping mode of synchronous subframe, various optional mapping modes can refer to Fig. 9 A~Fig. 9 D.

Wherein, reference signal can be mapped in asynchronous subframe by sending device 501 according to one of the various mapping modes that embodiment two or embodiment three provide, receiving device 502 uses mapping mode identical with sending device 501, can obtain reference signal from received asynchronous subframe.

In embodiment two and embodiment three, reference signal can be first kind reference signal above-mentioned, be applicable to high-speed mobile scene and/or the biggish scene of exemplary frequency deviation values.

Wherein, optionally, in each subframe that reference signal occupies, reference signal is occupied there are two symbols at least four symbols and at least four symbols, and the intersymbol interval of existing two symbols is not more than two symbols.

Wherein, reference signal occupies at least four symbols in each subframe of occupancy, it can guarantee that the receiving device of reference signal can obtain enough reference signal resources and carry out frequency offset estimation, and can also it guarantee under communication equipment high-speed mobile, channel rapid fading serious situation, more reference signals can be obtained in the unit time, thus more acurrate according to the result that reference signal carries out channel estimation.

Wherein, there are two symbols in above-mentioned at least four symbol, it is to guarantee correctly to estimate biggish exemplary frequency deviation values that the intersymbol interval of the two symbols, which is not more than two symbols,.Interval between two symbols comprising reference signal is bigger, and the exemplary frequency deviation values that the receiving device of reference signal can accurately be estimated are smaller.

Under high-speed mobile, the scene of high-power deviation, reference signal occupies 4 symbols in a subframe, if then receiving device is received using linear receiver, can not overcome the influence of high-speed mobile Yu big frequency departure completely.At this point, receiving device needs to process using the high performance receiver of the high complexity such as decision-feedback or iteration equalizing.

In order to further increase the density of reference signal in time domain, more reference signals are provided for channel estimation, and in order to reduce the complexity of receiving device receiver, optionally, in each subframe that reference signal occupies, reference signal is occupied there are two symbols at least five symbols and at least five symbols, and the intersymbol interval of existing two symbols is not more than two symbols.

Further, in each time slot of a subframe, reference signal occupies at least two symbols, this is because: if in a subframe, all reference signals all in one time slot, and another Without reference to signal in time slot, will lead under conditions of high movement speed, it should be without reference to the channel estimation results inaccuracy of the time slot of signal, the decline of data demodulation performance.

Wherein, in each time slot of a subframe, reference signal occupies at least two symbols, this is because: if in a subframe, all reference signals all in one time slot, and without reference to signal in another time slot, will lead under conditions of high movement speed, the channel estimation results inaccuracy of the time slot without reference to signal, the decline of data demodulation performance.This is because: if the characteristic of channel changes less in a subframe, and the characteristic of channel of a time slot and the characteristic of channel difference of another time slot are little in a subframe under conditions of low speed is mobile.And under conditions of high-speed mobile, the characteristic of channel difference of two time slots of a subframe is very big, requires have reference signal in each time slot at this time.

Further, in order to save the physical resource that reference signal occupies, improve data transfer efficiency, on frequency domain, in each resource unit that reference signal occupies, reference signal occupies discontinuous multiple subcarriers.In LTE system, which can be Physical Resource Block (Physical Resource Block, PRB).

Reference signal occupies discontinuous subcarrier, can guarantee that total expense of all reference signals in a subframe is smaller.Because, in order to guarantee the estimation performance of exemplary frequency deviation values and to the support of high-speed mobile scene, the density of reference signal is increased in the time domain, so if if continuous on frequency domain, the expense of reference signal will be very high, also, after density in the time domain resists big frequency shift (FS) and higher movement speed enough, on frequency domain also It is not necessary to centainly occupy continuous subcarrier.

Optionally, on frequency domain, in each above-mentioned resource unit that reference signal occupies, reference signal occupies at least three subcarriers.It include 12 subcarriers in a PRB, reference signal occupies at least three subcarrier in this 12 subcarriers by taking PRB as an example.

Assuming that reference signal occupies all subcarriers in 1 symbol over each slot, occupies 24 subcarriers altogether in two time slots of a subframe in LTE system.The scheme provided using embodiment two, such as: in the time domain, reference signal occupies 4 symbols in one time slot；On frequency domain, reference signal occupies 3 subcarriers in a PRB, then reference signal occupies in total in one time slot Sub-carrier number is 2*4*3=24 subcarrier.For another example: in the time domain, reference signal occupies 4 symbols in one time slot；On frequency domain, reference signal occupies 4 subcarriers in a PRB, then the sub-carrier number that reference signal occupies in total in one time slot is 2*4*4=32 subcarrier.

Optionally, in the time domain, in each subframe that reference signal occupies, the symbolic number that the first reference signal occupies is less than the symbolic number that can be used for transmitting data in the subframe.

Optionally, in the time domain, in each of each subframe that reference signal occupies time slot, reference signal occupies adjacent multiple symbols.

As previously described, interval between two symbols comprising reference signal is bigger, the exemplary frequency deviation values that the receiving device of reference signal can accurately be estimated are smaller, therefore, in each of each subframe that reference signal occupies time slot, reference signal occupies adjacent multiple symbols, it is ensured that estimation performance of the receiving device 502 to the exemplary frequency deviation values of each time slot.

Further, in each of each subframe that reference signal occupies time slot, reference signal occupies two group codes respectively, and each group code includes adjacent multiple symbols.

It can guarantee receiving device 502 in each time slot to the performance of exemplary frequency deviation values estimation in this way.And it can guarantee there is maximum frequency deviation value in any one time slot, and under the scene of communication equipment high-speed mobile, even if noise is relatively low, also there can be the performance of preferable channel estimation and exemplary frequency deviation values estimation, the symbolic number that reference signal occupies is more, receiving device 502 is stronger to the rejection ability of noise when carrying out channel estimation, and the estimated capacity of exemplary frequency deviation values is stronger.

Optionally, in each subframe that reference signal occupies, last symbol is null symbol (GAP).

Optionally, reference signal is sent from the same antenna port, this is because, receiving device is only when receiving from the reference signal of the same antenna port, it just can be carried out the accurate estimation of biggish exemplary frequency deviation values, this is because: the characteristic of channel of the signal from different antennae port can be different, so the estimation of frequency departure can only be carried out for the reference signal of the same antenna port in terms of receiving device side.

In each embodiment of the application including embodiment two and embodiment three, receiving device 502 can estimating frequency offset value working principle it is as follows:

It is inclined that exemplary frequency deviation values can generate phase relevant to character position on each subcarrier of each symbol Difference, on a symbol, the digital baseband input signal is identical.By reference signal in case where the sub-carrier positions occupied on distinct symbols are identical, as in fig. 8d, reference signal occupies subcarrier 1,5,9 (subcarrier number from the bottom up, is numbered from 0) on symbol 0, and reference signal also occupies subcarrier 1,5,9 in symbol 1.By the reference signal on each subcarrier on symbol 0, after carrying out conjugate multiplication with the reference signal in the corresponding sub-carrier positions on symbol 1 respectively, each result that conjugate multiplication is obtained is filtered, it can estimate to obtain this digital baseband input signal, exemplary frequency deviation values are then estimated according to this digital baseband input signal.

Further, when estimation, the precision of estimation can be influenced because of interference and thermal noise, there are more time domain reference signal symbols, or guarantee the subcarrier for having the reference signal of certain data in frequency domain, then it can ensure that the precision of the exemplary frequency deviation values estimated according to reference signal.

In the following, specifically introducing the various optional mapping modes that reference signal is mapped to asynchronous subframe of the offer of embodiment two.

[embodiment two]

In the following, being illustrated with reference to Fig. 8 A~Fig. 8 P to the various optional reference signal mapping modes of embodiment two.

Mapping mode one

Once, without GAP in the subframe that reference signal occupies, CP is normal CP to mapping mode, and in the time domain, reference signal occupies 8 symbols in a subframe, in two time slots of the subframe that reference signal occupies, reference signal 4 symbols of occupancy respectively over each slot.

Fig. 8 A shows nine kinds of optional mapping modes of mapping mode one.In Fig. 8 A, every a line represents a kind of optional mapping mode.Wherein number 0~6 indicates the symbol that number is 0~6 in a time slot.The symbol that overstriking has underscore is the symbol that reference signal occupies, and it does not include reference signal that other, which is data symbol,.

Wherein, the reference signal mapping mode of first time slot and second time slot of a subframe may be the same or different, and the reference signal of first time slot and the second time slot can be using mapping mode shown in any row in Fig. 8 A.

As previously mentioned, in embodiment two, on frequency domain, in each resource unit that reference signal occupies, Reference signal can occupy discontinuous multiple subcarriers, or only take up a subcarrier.Several optional frequency domain mapping modes are set forth below, these optional frequency domain mapping modes may be not only suitable for mapping mode one, could be applicable to other mapping modes of embodiment two.

1, frequency domain mapping mode one

By taking the time domain mapping mode of the first row shown in Fig. 8 A as an example, reference signal occupies the symbol 0 in two time slots of a subframe respectively, Isosorbide-5-Nitrae, and 5, occupy 8 symbols altogether in a subframe.

Frequency domain mapping mode is as shown in Figure 8 B, wherein the number of the digital representation symbol of bottom line.Fig. 8 B is shown in frequency domain mapping mode, which is with normal CP, and a resource unit PRB includes 12 subcarriers on frequency domain.On the direction of frequency domain, in the subcarrier that placed 4 reference signals of each PRB equal intervals, and on the different symbols that reference signal occupies, position of the subcarrier that reference signal occupies on frequency domain is identical.

2, frequency domain mapping mode two

Optionally, the position for the subcarrier that reference signal occupies on frequency domain can staggeredly occur, shown in following Fig. 8 C.

3, frequency domain mapping mode three

Fig. 8 D shows the frequency domain mapping mode that reference signal occupies 3 subcarriers on each PRB, and on the distinct symbols that reference signal occupies, position of the subcarrier that reference signal occupies on frequency domain is identical.

4, frequency domain mapping mode four

Shown in Fig. 8 E is also the frequency domain mapping mode that reference signal occupies 3 subcarriers on each PRB, but unlike frequency domain mapping mode three, and the position for the subcarrier that reference signal occupies on frequency domain can staggeredly occur.

As previously mentioned, above-mentioned optional frequency domain mapping mode may be not only suitable for mapping mode one, it could be applicable to other mapping modes of embodiment two.Both time domain mapping mode and frequency domain mapping mode of reference signal need not be bound, and can be combined with each other.In the following, only being provided in different situations to describe simplicity, various time domain mapping modes of the reference signal in a subframe.

Mapping mode two

Under mapping mode two, having GAP, CP in the subframe that reference signal occupies is normal CP, and in the time domain, reference signal occupies 8 symbols in a subframe, and in two time slots of the subframe that reference signal occupies, reference signal occupies 4 symbols respectively over each slot.

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

Several optional mapping modes of mapping mode two can be as shown in Figure 8 F.

Mapping mode three

Under mapping mode three, without GAP in the subframe that reference signal occupies, CP is normal CP, and in the time domain, reference signal occupies 6 symbols in a subframe, in two time slots of the subframe that reference signal occupies, reference signal 3 symbols of occupancy respectively over each slot.

Wherein, the reference signal mapping mode of first time slot and second time slot of a subframe may be the same or different, and the reference signal of first time slot and the second time slot can be using mapping mode shown in any row in Fig. 8 G.

Mapping mode four

Under mapping mode four, having GAP, CP in the subframe that reference signal occupies is normal CP, and in the time domain, reference signal occupies 6 symbols in a subframe, and in two time slots of the subframe that reference signal occupies, reference signal occupies 3 symbols respectively over each slot.

Optionally, GAP is located at the last symbol in a subframe, does not send any information.As illustrated in figure 8h, last symbol is symbol 6 in subframe, is GAP.

Several optional mapping modes of mapping mode four can be as illustrated in figure 8h.

Mapping mode five

Under mapping mode five, CP is normal CP, in the subframe that reference signal occupies, in first time slot, reference signal occupies 4 symbols, and mapping mode of the reference signal in first time slot is mapped when can occupy 8 symbols according to a sub- frame reference siganl；In second time slot, reference signal occupies 3 symbols, and mapping mode of the reference signal in second time slot is mapped when can occupy 6 symbols according to a sub- frame reference siganl.When in the symbol that reference signal occupies without GAP, the examples of several optional mapping modes can be several as shown in fig. 81, when having GAP in the symbol that reference signal occupies The example of optional mapping mode can be as illustrated by figure 8j.

Alternatively, reference signal occupies 3 symbols in first time slot, in second time slot, reference signal occupies 4 symbols.There can be a variety of different combinations, here without limitation.

Mapping mode six

Under mapping mode six, CP is extension CP, and in the subframe that reference signal occupies, reference signal occupies 7 symbols.In first time slot, reference signal occupies 4 symbols, shows the example of several mapping modes in Fig. 8 K；In second time slot, reference signal occupies 3 symbols, and Fig. 8 L shows the example of several mapping modes.

Mapping mode seven

Under mapping mode seven, having GAP, CP in the subframe that reference signal occupies is extension CP, and in the subframe that reference signal occupies, reference signal occupies 7 symbols.In first time slot of the subframe, any mapping mode shown in Fig. 8 K is can be used in reference signal, and in second time slot of the subframe, any mapping mode shown in Fig. 8 M is can be used in reference signal.

Mapping mode eight

Under mapping mode eight, without GAP in the subframe that reference signal occupies, CP is extension CP, in the subframe that reference signal occupies, reference signal occupies 6 symbols, wherein in first of the subframe and second time slot, reference signal respectively occupies 3 symbols, and any mapping mode shown in Fig. 8 L can be used in reference signal in first time slot and second time slot.

Mapping mode nine

Under mapping mode nine, last symbol is GAP in the subframe that reference signal occupies, and does not send any information, and CP is extension CP, and in the subframe that reference signal occupies, reference signal occupies 6 symbols.In first time slot, any mapping mode shown in Fig. 8 L is can be used in reference signal, and in second time slot, any mapping mode shown in Fig. 8 M is can be used in reference signal.

Mapping mode ten

Under mapping mode ten, without GAP in the subframe that reference signal occupies, CP is extension CP, and in the subframe that reference signal occupies, reference signal occupies 5 symbols.In first time slot of the subframe, reference signal occupies 3 symbols, and in the second time slot, reference signal occupies 2 symbols.

Wherein, reference signal first time slot mapping mode can as seen in fig. 8n, the mapping mode of second time slot can be as shown in Fig. 8 O.

Mapping mode 11

Mapping mode ten once, last symbol is GAP in the subframe that reference signal occupies, and CP is extension CP, and in the subframe that reference signal occupies, reference signal occupies 5 symbols.In first time slot of the subframe, reference signal occupies 3 symbols, and in the second time slot, reference signal occupies 2 symbols.

Wherein, reference signal the mapping mode of first time slot of a subframe can be identical as the mapping mode of first time slot under mapping mode ten, can as seen in fig. 8n, the mapping mode of second time slot can be as shown in Fig. 8 P.

In Fig. 8 F~Fig. 8 P, every a line represents a kind of optional mapping mode.Wherein number 0~6 indicates the symbol that number is 0~6 in a time slot.The symbol that overstriking has underscore is the symbol that reference signal occupies, and it does not include reference signal that other, which is data symbol,.

In the following, specifically introducing the various optional mapping modes that reference signal is mapped to synchronous subframe of the offer of embodiment three.

[embodiment three]

In the third embodiment, reference signal is mapped in synchronous subframe.It include synchronization signal in synchronous subframe, synchronization signal is for the synchronization between communication equipment.

Here, synchronous subframe is by taking the synchronization subframe in current D2D system as an example.Wherein, PD2DSS is that SD2DSS is, in the subframe, it does not include GAP that last symbol, which can be in GAP or the subframe,.Reference signal is by taking DMRS as an example.

Fig. 9 A shows current DMRS in the mapping mode of the synchronization subframe of D2D system.Wherein DMRS occupies the symbol 3 of first time slot and second time slot respectively.The symbol 0 of symbol and first time slot between two occupied symbols of DMRS is for sending PSBCH signal.Running time-frequency resource shown in Fig. 9 A occupies the subframe of 1ms in the time domain, and 6 PRB are occupied on frequency domain.

As previously mentioned, in order to which receiving device can accurately carry out channel estimation and/or offset estimation, in the time domain, increasing to adapt to high-speed mobile scene and/or there are the scenes of big frequency departure and having carried out reference signal Density, and the position between reference signal is arranged, also, optionally, on frequency domain can noncontinuous map, to reduce expense of the reference signal in entire subframe.

Illustrating in synchronous subframe below with reference to Fig. 9 B~Fig. 9 D is if the mapping of reference signal is carried out, to reach above-mentioned purpose.Reference signal can be wherein determined as to first kind reference signal, using first kind reference signal, to reach above-mentioned purpose.

Optionally, reference signal can occupy 7 symbols in synchronous subframe, wherein 4 symbols be occupied in first time slot, as shown in Figure 8 B, wherein P indicates PD2DSS；3 symbols are occupied in second time slot, mapping mode is as shown in Figure 8 C when in synchronous subframe without GAP, and as in fig. 8d, in Fig. 8 C and Fig. 8 D, S indicates SD2DSS to mapping mode when the last symbol in synchronous subframe is GAP.

Optionally, reference signal can also occupy 6 symbols in synchronous subframe, wherein 3 symbols be occupied respectively in first and second time slot, or in first Time Slot Occupancy, 4 symbols, in second Time Slot Occupancy, 2 symbols.

Optionally, reference signal can also occupy 5 symbols in synchronous subframe, wherein in first Time Slot Occupancy, 3 symbols, in second Time Slot Occupancy, 2 symbols.

In the present embodiment two and embodiment three, when the symbolic number that reference signal occupies in a subframe expands at least five, due to using discrete mapping mode on frequency domain, the expense of reference signal and the expense of reference signal in current LTE protocol are essentially identical, i.e. without increasing additional overhead, and the time domain density of reference signal is improved, to improve the tenability of the scene to high-speed mobile and high-frequency deviation.

It is described above in embodiment two and embodiment three, by sending first kind reference signal, to adapt to the scene of high-speed mobile, high-frequency deviation etc..In the following, introducing power regulation scheme provided by the present application by example IV and embodiment five, by example IV and embodiment five, can solve the problems, such as above-mentioned as follows:

Since the PAPR of reference signal is higher than data, when the transmission power of the transmitter of sending device enters zone of saturation, the transmission power of reference signal and data when being modulated to data using amplitude, may result in receiver and mistake occur when carrying out data demodulation there are deviation.

In example IV and embodiment five, sending device 501 sends the process of reference signal, receiving device The process of 502 reception reference signals can refer to embodiment one, wherein example IV on the basis of example 1, increases the step of sending device 501 carries out power indication to receiving device 502；On the basis of example 1, sending device 501 has first carried out power adjustment before sending reference signal to embodiment five.

When adapting to the scene of high-speed mobile and/or big frequency departure, the mapping scheme for the reference signal that example IV and embodiment five are also provided in combination with embodiment two and embodiment three, to improve the correctness that receiving device 502 carries out channel estimation and offset estimation.

In the following, being illustrated in conjunction with attached drawing to example IV and embodiment five.

[example IV]

In example IV, sending device 501 is other than it will send reference signal and data to receiving device 502, also want transmission power indicative information, receiving device 502 determines between data and the transmission power of reference signal according to the power indicative information received with the presence or absence of power deviation, power deviation if it exists, it then determines power offset value, and data demodulation is carried out according to determining power offset value.

In example IV, it is related to two kinds of signals: the first signal and the second signal.

Wherein, the first signal includes data in the symbol of reference signal for carrying not, and second signal is the symbol including reference signal in the subframe of the first signal place, only carries reference signal or carrying reference signal and data in these symbols；Or

First signal is used to carry the data in the symbol including reference signal, and second signal is the reference signal in the symbol.

In example IV, it is related to two transmission power levels: the first transmission power level and the second transmission power level, the first transmission power level is the transmission power level of the first signal, and the second transmission power level is the transmission power level of second signal.When the first transmission power level is greater than transmission power threshold value, there are power offset values between the first transmission power level and the second transmission power level, and the first transmission power level is less than the second transmission power level.

In example IV, it is related to a transmission power threshold value, the transmission power threshold value is for judging whether there is above-mentioned power offset value.

In example IV, it is related to the first power indicative information, the first power indicative information is used to indicate:

First transmission power level is greater than transmission power threshold value；Or

There are power deviations between first transmission power level and the second transmission power level；Or

First transmission power level；

Optionally, it may also refer to the second power indicative information, which is used to indicate:

First transmission power level is not more than transmission power threshold value；Or

Power deviation is not present between first transmission power level and the second transmission power level；Or

First transmission power level.

Optionally, first power indicative information is used to indicate between the first transmission power level and the second transmission power level that there are power deviations, second power indicative information, which is used to indicate between the first transmission power level and the second transmission power level, is not present power deviation, then in specific implementation, it can indicate to whether there is power deviation between the first transmission power level and the second transmission power level by 1bit information, if the 1bit information is that " 0 " indicates that power deviation is not present between the first transmission power level and the second transmission power level, if the 1bit information is that " 1 " indicates that there are power deviations between the first transmission power level and the second transmission power level.

Figure 10 is shown in example IV, and the flow chart of the interaction flow between sending device 501 and receiving device 502, the process includes the following steps:

The sending device 501 of S1001: the first signal obtains the first transmission power level Ptx；

S1002: judging whether the first transmission power level is greater than transmission power threshold value Ptx_th- Δ, if so, S1003 is thened follow the steps, if it is not, then optionally, executing step S1006；

Ptx+ Δ can be compared with Ptx_th when judging, if (Ptx+ Δ) > Ptx_th, the first transmission power is greater than transmission power threshold value.Here, Δ is preset parameter, for determining between reference signal and data because of the power offset value generated the problem of PAPR；Ptx_th is predefined parameter, for judging whether the transmission power of transmitter enters the threshold value of zone of saturation.For example, the saturation power of sending device 501 is 23dBm, Δ=2dB.Then if Ptx > 21dBm shows that the transmission power of reference signal produces saturation.Its corresponding physical significance is, is actually Ptx- Δ in the transmission power of reference signal, and the transmission power of data is Ptx.Also, the value of further Δ is related with following factor:

1, the modulation system of the data of subframe where reference signal, such as: quadrature phase shift keying (Quadrature Phase Shift Keying, QPSK), 16QAM, 64QAM etc..

2, the multi-carrier mode of the data of subframe where reference signal, such as: single carrier frequency division is multiplexed (Single Carrier-Frequency Division Multiplexing, SC-FDM), OFDM, CDMA access (Code Division Multiple Access, CDMA) etc.；

3, system bandwidth；Such as: 1.4MHz, 3MHz, 5MHz, 10MHz and 20MHz etc.；

4, the bandwidth that data occupy in subframe where reference signal, such as: 1.4MHz, 3MHz, 5MHz, 10MHz and 20MHz etc.；

5, reference signal is mapped to the mapping mode on physical resource, such as: the type of different reference signals is divided according to different mapping modes, then can also determine the value of Δ according to the type of reference signal here.

S1003: sending device 501 sends the first power indicative information to the receiving device 502 of the first signal；

S1004: receiving device 502 determines that there are power deviations between the first transmission power level and the second transmission power level of second signal after receiving first power indicative information；

S1005: receiving device 502 determines power offset value, and the data in data or the first signal place subframe in the first signal are demodulated according to determining power offset value, according to formula 1 above-mentioned, receiving device 502, which removes the corresponding range value of power offset value from the data symbol that estimation obtains, can correctly solve adjusting data；

S1006: sending device 501 sends the second power indicative information to receiving device 502；

S1007: after receiving device 502 receives the second power indicative information, determine that there is no power deviations between the first transmission power level and the second transmission power level of second signal.

Wherein, if the first power indicative information is used to indicate power offset value, sending device 501 can determine power offset value Δ according at least one in following message before executing step S1003:

The bandwidth that data occupy in the multi-carrier mode of data, system bandwidth and subframe where reference signal in subframe where the modulation system of data, reference signal in subframe where reference signal is mapped to the mapping mode of physical resource, reference signal；

Wherein, the type of reference signal includes first kind reference signal and the second class reference signal, and the symbolic number that first kind reference signal occupies in a subframe is more than the symbolic number that the second class reference signal occupies in a subframe.

In addition, receiving device 502 is when executing step S1005, can also according in above- mentioned information at least One, determine power offset value Δ.

Such as: sending device 501 and receiving device 502 can determine power offset value Δ by way of tabling look-up.Table 2 gives under different modulation systems and multi-carrier mode, the Δ value when reference signal is DMRS.The benchmark compared in the following table 2 uses SC-FDM to modulate when being data transmission, and without reference signal in each subcarrier in frequency domain of this data symbol.

Table 2, power offset value Δ

[embodiment five]

In embodiment five, sending device 501 carries out power adjustment, enters zone of saturation to avoid the transmission power of transmitter when the transmission power for determining data is greater than transmission power threshold value.

In embodiment five, also it is related to two kinds of signals: the first signal and the second signal.It is identical as the meaning of the first signal and the second signal in example IV.

In example IV, it is related to the first transmission power level and the second transmission power level, the first transmission power level is the transmission power level of the first signal, and the second transmission power level is the transmission power level of second signal.When the first transmission power level is greater than transmission power threshold value, there are power offset values between the first transmission power level and the second transmission power level, and the first transmission power level is less than the second transmission power level.

In embodiment five, it is related to a transmission power threshold value, the transmission power threshold value is for judging whether there is above-mentioned power offset value, the same example IV of meaning.

In embodiment five, when sending device 501 determines that the first transmission power level is greater than transmission power threshold value, no longer to 502 transmission power indicative information of receiving device, but the power adjustment of sending device 501 is carried out.

Figure 11 is shown in embodiment five, and the process flow of sending device 501 includes the following steps:

S1101: the first transmission power level is obtained；

S1102: judging whether the first transmission power level is greater than transmission power threshold value, if so, thening follow the steps S1103；

S1103: power adjustment is determined；

Wherein, sending device 501 can be used sending device 501 or receiving device 502 in example IV and determine that the mode of power offset value Δ determines Δ, and using Δ as power adjustment.

Here, the method by taking reference signal mapping mode corresponds to different types of reference signal as an example, to illustrate the determining power adjustment of sending device 501.Assuming that there are two kinds to refer to signal type, one is first kind reference signal above-mentioned, another kind is the second class reference signal above-mentioned, and the PAPR of these two types of reference signals is different, therefore corresponding different power adjustment.Sending device 501 can be first kind reference signal or the second class reference signal according to reference signal to determine power adjustment.

S1104: it carries out following power adjustment: the transmission power of the first signal is reduced into power adjustment, and the transmission power of second signal is reduced into power adjustment (ensuring that the transmission power of all signals does not enter saturation region) or keeps the transmission power of second signal constant (only reducing the transmission power of data at this time, the effective transmission power of the first signal is identical as the effective transmission power of second signal after entering saturation region).

In example IV and embodiment five, power adjustment is carried out by sending device 501, or there are power deviations to the instruction of receiving device 502, so that receiving device 502 is when carrying out data demodulation, accurate channel estimation can be carried out according to reference signal, data are correctly demodulated according to obtained accurate channel estimation results, improve the accuracy of data demodulation.

In the following, introducing the transmission scheme of the reference signal of the offer of embodiment six.In embodiment six, sending device 501 is when sending reference signal, different types of reference signal can be used according to different scenes, reference signal is flexibly used to reach, improve the accuracy of 502 channel estimation of receiving device, and reduce the purpose of reference signal expense, bigger spectrum efficiency is obtained under the premise of guaranteeing communication quality.

The scheme that embodiment six provides is applicable to any one of one~embodiment of above-described embodiment five.In embodiment six, the process that sending device 501 sends reference signal can refer to embodiment one, and receiving device 502 receives the process of reference signal see also embodiment one.

[embodiment six]

Figure 12 shows in embodiment six that optional interaction flow, the process include the following steps: between sending device 501 and receiving device 502

S1201: the movement speed of the sending device of the type and/or reference signal for the synchronisation source that sending device 501 is synchronized to according to itself determines that reference signal is first kind reference signal or the second class reference signal；

S1202: sending device 501 generates reference signal；

S1203: sending device 501 sends the reference signal of generation；

S1204: receiving device 502 determines the type for the reference signal that sending device 501 is sent；

S1205: receiving device 502 according to determining reference signal type reception reference signal；

S1206: receiving device 502 carries out signal processing to received reference signal.

Wherein, the type indication information for being used to indicate reference signal type can be issued receiving device 502 in advance by sending device 501, and receiving device 502 determines reference signal type according to the instruction information received.

In step S1201, sending device 501 can be used under type such as and determine the type of reference signal:

If the type for the synchronisation source that sending device 501 is synchronized to is that synchronization accuracy is lower than the synchronisation source of precision threshold or the movement speed of sending device 501 is higher than movement speed threshold value, it is determined that reference signal is first kind reference signal；

If the type for the synchronisation source that sending device 501 is synchronized to is the synchronisation source that synchronization accuracy is not less than precision threshold, and the movement speed of sending device 501 is not higher than movement speed threshold value, it is determined that reference signal is the second class reference signal.

[embodiment seven]

Figure 13 is the structural schematic diagram for the first reference signal sending device that the embodiment of the present application seven provides.As shown in figure 13, which includes:

Processing module 1301, for generating reference signal, reference signal is first kind reference signal；

Sending module 1302, the reference signal for generating processing module 1301 are sent；

Wherein, in the time domain, in each subframe that first kind reference signal occupies, first kind reference signal is occupied there are two symbols at least five symbols and at least five symbols, and the intersymbol interval of existing two symbols is not more than two symbols.

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

Optionally, on frequency domain, in each resource unit that first kind reference signal occupies, reference signal occupies discontinuous multiple subcarriers.

Optionally, on frequency domain, in each resource unit that first kind reference signal occupies, first kind reference signal occupies at least three subcarriers.

Optionally, in the time domain, in each subframe that first kind reference signal occupies, the symbolic number that the first reference signal occupies is less than the symbolic number that can be used for transmitting data in the subframe.

Optionally, in the time domain, in each of each subframe that first kind reference signal occupies time slot, reference signal occupies adjacent multiple symbols.

Optionally, in each of each subframe that first kind reference signal occupies time slot, first kind reference signal occupies two group codes respectively, and each group code includes adjacent multiple symbols.

Optionally, if the subframe that first kind reference signal occupies is normal CP subframe, the symbol that first kind reference signal occupies in a time slot in the subframe of occupancy includes:

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 that first kind reference signal occupies is normal CP subframe, the symbol that first kind reference signal occupies in a time slot in the subframe of occupancy includes:

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 that first kind reference signal occupies includes: synchronous subframe and/or asynchronous subframe；

Include synchronization signal in synchronous subframe, does not include synchronization signal in asynchronous subframe.

Optionally, the receiving device of sending device and reference signal is terminal device；Or

Sending device is terminal device, and the receiving device of reference signal is the network equipment；

Sending device is the network equipment, and the receiving device of reference signal is terminal device；Or

The receiving device of sending device and reference signal is the network equipment；

Optionally, the network equipment includes base station, and terminal device includes user equipment (UE) or roadside unit RSU.

Optionally, in each subframe that first kind reference signal occupies, last symbol is null symbol GAP.

Optionally, first kind reference signal is the reference signal that the same antenna port is sent.

Optionally, processing module 1301 is also used to: before generating reference signal,

The movement speed of the sending device of the type and/or reference signal for the synchronisation source being synchronized to according to the sending device of reference signal determines that reference signal is first kind reference signal.

Optionally, if the type for the synchronisation source that the sending device of reference signal is synchronized to is that synchronization accuracy is lower than the synchronisation source of precision threshold or the movement speed of the sending device of reference signal is higher than movement speed threshold value, it is determined that reference signal is first kind reference signal.

In embodiment seven, the optional process that the sending device of reference signal sends reference signal can refer to transmission process shown in fig. 6 in embodiment one.The various optional implementations of the sending device of reference signal can refer to the operation of sending device 501 in embodiment two and embodiment three, wherein, processing module 1301 can be used for executing the processing operation of sending device 501, and sending module 1302 can be used for executing the transmission operation of sending device 501.

Wherein, processing module 1301 can be realized by processor, and sending module 1302 can be realized by transmitter.

[embodiment eight]

Figure 14 is the structural schematic diagram for second of reference signal sending device that the embodiment of the present application eight provides.As shown in figure 14, which includes:

Processor 1401, for generating reference signal, reference signal is first kind reference signal；

Transmitter 1402, the reference signal for generating processor 1401 are sent；

Wherein, the various optional implementations of processor 1401 can refer to processing module 1301, and the various optional implementations of transmitter 1402 can refer to sending module 1302.

In embodiment seven, the optional process that the sending device of reference signal sends reference signal can refer to transmission process shown in fig. 6 in embodiment one.The various optional implementations of the sending device of reference signal can refer to the operation of sending device 501 in embodiment two and embodiment three, wherein, processor 1401 can be used for executing the processing operation of sending device 501, transmitter 1402 can be used for executing the transmission operation of sending device 501, and the reference signal that transmitter 1402 is sent can be launched by one or more antenna of connection.

[embodiment nine]

Figure 15 is the structural schematic diagram for the first reference signal receiving device that the embodiment of the present application nine provides.As shown in figure 15, which includes:

Receiving module 1501, for receiving reference signal；

Processing module 1502, the reference signal for receiving to receiving module 1502 carry out signal processing；

Optionally, in each time slot of subframe, first kind 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 of reference signal and receiving device are terminal device；Or

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

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

The sending device and receiving device of reference signal are the network equipment；

In embodiment nine, the receiving device of reference signal is received and the optional process of processing reference signal can refer to process shown in Fig. 7 in embodiment one.The various optional implementations of the receiving device of reference signal can refer to the operation of receiving device 502 in embodiment two and embodiment three, wherein, processing module 1502 can be used for executing the processing operation of receiving device 502, and receiving module 1501 can be used for executing the reception operation of receiving device 502.

Wherein, processing module 1502 can be realized by processor, and receiving module 1501 can be realized by receiver.

[embodiment ten]

Figure 16 is the structural schematic diagram for the first reference signal receiving device that the embodiment of the present application ten provides. As shown in figure 16, which includes:

Receiver 1601, for receiving reference signal；

Processor 1602, the reference signal for receiving to receiver 1602 carry out signal processing；

In embodiment ten, the various optional implementations of receiver 1601 can refer to receiving module 1501, and the various optional implementations of processor 1602 can refer to processing module 1502.

In embodiment ten, the receiving device of reference signal is received and the optional process of processing reference signal can refer to process shown in Fig. 7 in embodiment one.The various optional implementations of the receiving device of reference signal can refer to the operation of receiving device 502 in embodiment two and embodiment three, wherein, processor 1602 can be used for executing the processing operation of receiving device 502, and receiver 1601 can be used for executing the reception operation of receiving device 502.

[embodiment 11]

Figure 17 is the structural schematic diagram of the sending device for the first power indicative information that the embodiment of the present application 11 provides.As shown in figure 17, which includes:

Processing module 1701, for obtaining the first transmission power level of the first signal；

Sending module 1702 when the first transmission power level for obtaining in processing module 1701 is greater than transmission power threshold value, sends the first power indicative information to the receiving device of the first signal, the first power indicative information is used to indicate:

First transmission power level；

First signal includes data in the symbol of reference signal for carrying not, and second signal is the reference signal in the symbol where the first signal in subframe including reference signal；Or

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

Optionally, sending module 1702 is also used to: after the first transmission power level that processing module 1701 obtains the first signal in subframe, if the first transmission power level obtained is not more than transmission power threshold value, the second power indicative information then is sent to the receiving device of the first signal, the second power indicative information is used to indicate:

First transmission power level.

Optionally, if the first power indicative information is used to indicate power offset value, then processing module 1701 is also used to: before sending the first power indicative information to the receiving device of the first signal, further includes: according at least one in following message, determines power offset value:

Reference signal is mapped to the mapping mode on physical resource；

The modulation system of data in the subframe of reference signal place；

The multi-carrier mode of data in the subframe of reference signal place；

System bandwidth；

The bandwidth that data occupy in subframe where reference signal.

Wherein, the various optional implementations of the sending device can refer to the processing of sending device 501 in example IV, wherein processing module 1701 is used to execute the processing operation of sending device 501, and sending module 1702 is used to execute the transmission operation of sending device 501.

Wherein, processing module 1701 can be realized by processor, and sending module 1702 can be realized by transmitter.

[embodiment 12]

Figure 18 is the structural schematic diagram of the sending device for second of power indicative information that the embodiment of the present application 12 provides.As shown in figure 18, which includes:

Processor 1801, for obtaining the first transmission power level of the first signal；

Transmitter 1802 when the first transmission power level for obtaining in processor 1801 is greater than transmission power threshold value, sends the first power indicative information to the receiving device of the first signal, the first power indicative information is used to indicate:

First transmission power level；

Wherein, the various optional implementations of processor 1801 can refer to processing module 1701, and the various optional implementations of transmitter 1802 can refer to sending module 1702.

Other optional implementations of the sending device can refer to the processing of sending device 501 in example IV, wherein processor 1801 is used to execute the processing operation of sending device 501, and transmitter 1802 is used to execute the transmission operation of sending device 501.

The power indicative information that transmitter 1802 is sent can be sent by one or more antenna.

[embodiment 13]

Figure 19 is the structural schematic diagram of the receiving device for the first power indicative information that the embodiment of the present application 13 provides.As shown in figure 19, which includes:

Receiving module 1901, the first power indicative information that the sending device for receiving the first signal is sent, the first power indicative information are used to indicate: the first transmission power level of the first signal is greater than transmission power threshold value；Or the first power offset value between transmission power level and the second transmission power level of second signal；Or first there are power deviations between transmission power level and the second transmission power level；Or first transmission power level；

Processing module 1902, for determining that there are power deviations between the first transmission power level and the second transmission power level of second signal according to the first power indicative information；

It determines power offset value, and the data in data or the first signal place subframe in the first signal is demodulated according to determining power offset value；

Wherein, the first signal includes data in the symbol of reference signal for carrying not, and second signal is the reference signal in the symbol where the first signal in subframe including reference signal；Or

Optionally, processing module 1902 is specifically used for: if the first power indicative information is used to indicate power offset value,

According at least one in following message, power offset value is determined: the bandwidth that data occupy in the multi-carrier mode of data, system bandwidth and subframe where reference signal in subframe where the modulation system of data, reference signal in subframe where reference signal is mapped to the mapping mode on physical resource, reference signal.

Wherein, the various optional implementations of the receiving device can refer to the processing of receiving device 502 in example IV, wherein processing module 1902 is used to execute the processing operation of receiving device 502, and receiving module 1901 is used to execute the reception operation of receiving device 502.

Wherein, processing module 1902 can be realized by processor, and receiving module 1901 can be realized by receiver.

[embodiment 14]

Figure 20 is the structural schematic diagram of the receiving device for second of power indicative information that the embodiment of the present application 14 provides.As shown in figure 20, which includes:

Receiver 2001, the first power indicative information that the sending device for receiving the first signal is sent, the first power indicative information are used to indicate: the first transmission power level of the first signal is greater than transmission power threshold value；Or the first power offset value between transmission power level and the second transmission power level of second signal；Or first there are power deviations between transmission power level and the second transmission power level；Or first transmission power level；

Processor 2002, for determining that there are power deviations between the first transmission power level and the second transmission power level of second signal according to the first power indicative information；

Optionally, processor 2002 is specifically used for: if the first power indicative information is used to indicate power deviation Value, then

Wherein, the various optional implementations of the receiving device can refer to the processing of receiving device 502 in example IV, wherein processor 2002 is used to execute the processing operation of receiving device 502, and receiver 2001 is used to execute the reception operation of receiving device 502.

[embodiment 15]

Figure 21 is the structural schematic diagram that the first transmission power that the embodiment of the present application 15 provides adjusts equipment.As shown in figure 21, which includes:

Performance number obtains module 2101, for obtaining the first transmission power level of the first signal；

First signal includes data in the symbol of reference signal for carrying not, and second signal is the reference signal in the symbol where the first signal in subframe including reference signal；Or first signal be used to carry the data in the symbol including reference signal, second signal is the reference signal in the symbol；

Power regulation module 2102, for when performance number obtains the first transmission power level that module 2101 obtains and is greater than transmission power threshold value, it carries out following power adjustment: the transmission power of the first signal being reduced into power adjustment, and the transmission power of second signal is reduced into power adjustment or keeps the transmission power of second signal constant.

Optionally, power regulation module 2102 is also used to: according at least one in following message before carrying out power adjustment, determine power adjustment:

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

The various optional implementations of the equipment can refer to the operation of sending device 501 in embodiment five, wherein, performance number obtains module 2101, it can be used for executing the operation of the determination signal transmission power of sending device 501, power regulation module 2102, the determination power adjustment that can be used for executing sending device 501, carries out the operation of power adjustment.

Wherein, the operation that performance number obtains module 2101 and power regulation module 2102 can be realized by processor, the power adjustment that power regulation module 2102 determines may act on the power amplifier of the equipment, for controlling the output power of radio circuit, the signal of radio circuit output can be launched by one or more antenna.

[embodiment 16]

Figure 22 is the structural schematic diagram for second of the transmission power adjustment equipment that the embodiment of the present application 16 provides.As shown in figure 22, which includes:

Processor 2201, for obtaining the first transmission power level of the first signal；

Processor 2201 is also used to: when the first transmission power level of acquisition is greater than transmission power threshold value, it carries out following power adjustment: the transmission power of the first signal being reduced into power adjustment, and the transmission power of second signal is reduced into power adjustment or keeps the transmission power of second signal constant；

Radio circuit 2202, the power adjustment for determining according to processor 2201 carry out transmission power adjustment.

Optionally, processor 2201 is also used to: according at least one in following message before carrying out power adjustment, determine power adjustment:

The various optional implementations of the equipment can refer to the operation of sending device 501 in embodiment five.The signal that radio circuit 2202 exports can be launched by one or more antenna.

[embodiment 17]

Figure 23 is the structural schematic diagram for the third reference signal sending device that the embodiment of the present application 17 provides.As shown in figure 23, which includes:

Processing module 2301, the type and/or reference signal of the synchronisation source for being synchronized to according to sending device Sending device movement speed, determine reference signal be first kind reference signal or the second class reference signal；And generate reference signal；

Sending module 2302, the reference signal for generating processing module 2301 are sent；

The symbolic number that first kind reference signal occupies in a subframe is more than the symbolic number that the second class reference signal occupies in a subframe.

Optionally, processing module 2301 is specifically used for:

If the type for the synchronisation source that the sending device of reference signal is synchronized to is that synchronization accuracy is lower than the synchronisation source of precision threshold or the movement speed of the sending device of reference signal is higher than movement speed threshold value, it is determined that reference signal is first kind reference signal；

If the type for the synchronisation source that the sending device of reference signal is synchronized to is the synchronisation source that synchronization accuracy is not less than precision threshold, and the movement speed of the sending device of reference signal is not higher than movement speed threshold value, it is determined that reference signal is the second class reference signal.

In embodiment 17, the optional process that the sending device of reference signal sends reference signal can refer to transmission process shown in fig. 6 in embodiment one.The various optional implementations of the sending device of reference signal can refer to the operation of sending device 501 in embodiment six, wherein, processing module 2301 can be used for executing the processing operation of sending device 501, and sending module 2302 can be used for executing the transmission operation of sending device 501.

Wherein, processing module 2301 can be realized by processor, and sending module 2302 can be realized by transmitter.

[embodiment 18]

Figure 24 is the 4th kind of structural schematic diagram with reference to apparatus for transmitting signal that the embodiment of the present application 18 provides.As shown in figure 24, which includes:

Processor 2401, the movement speed of the sending device of the type and/or reference signal of the synchronisation source for being synchronized to according to sending device determine that reference signal is first kind reference signal or the second class reference signal；And generate reference signal；

Transmitter 2402, the reference signal for generating processor 2401 are sent；

Optionally, processor 2401 is specifically used for:

In embodiment 18, the optional process that the sending device of reference signal sends reference signal can refer to transmission process shown in fig. 6 in embodiment one.The various optional implementations of the sending device of reference signal can refer to the operation of sending device 501 in embodiment six, wherein processor 2401 can be used for executing the processing operation of sending device 501, and transmitter 2402 can be used for executing the transmission operation of sending device 501.

The reference signal that transmitter 2402 is sent can be launched by one or more antenna.

[embodiment 19]

Figure 25 is the structural schematic diagram for the third reference signal receiving device that the embodiment of the present application 18 provides.As shown in figure 25, which includes:

Processing module 2501, the type of the reference signal of the sending device transmission for determining reference signal, the type of reference signal includes: first kind reference signal or the second class reference signal；

Receiving module 2502, the type reception reference signal of the reference signal for being determined according to processing module 2501；

Processing module 2501 is also used to: carrying out signal processing to the received reference signal of receiving module 2502；

In embodiment 19, the optional process that the receiving device of reference signal receives and processes reference signal can refer to process shown in Fig. 7 in embodiment one.The various optional implementations of the receiving device of reference signal can refer to the operation of receiving device 502 in embodiment six, wherein, processing module 2501 can be used for executing the processing operation of receiving device 502, and receiving module 2502 can be used for executing the reception operation of receiving device 502.

Wherein, processing module 2501 can be realized by processor, and receiving module 2502 can be realized by transmitter.

[embodiment 20]

Figure 26 is the 4th kind of structural schematic diagram with reference to signal receiver that the embodiment of the present application 18 provides.

As shown in figure 26, which includes:

Processor 2601, the type of the reference signal of the sending device transmission for determining reference signal, the type of reference signal includes: first kind reference signal or the second class reference signal；

Receiver 2602, the type reception reference signal of the reference signal for being determined according to processor 2601；

Processor 2601 is also used to: carrying out signal processing to the received reference signal of receiver 2602；

In embodiment 20, the optional process that the receiving device of reference signal receives and processes reference signal can refer to process shown in Fig. 7 in embodiment one.The various optional implementations of the receiving device of reference signal can refer to the operation of receiving device 502 in embodiment six, wherein processor 2601 can be used for executing the processing operation of receiving device 502, and receiver 2602 can be used for executing the reception operation of receiving device 502.

Receiver 2602 can receive reference signal by one or more antenna.

[embodiment 21]

Figure 27 is the flow chart for the first reference signal sending method that the embodiment of the present application 21 provides.As shown in figure 27, this method comprises the following steps:

S2701: generating reference signal, and reference signal is first kind reference signal；

S2702: the reference signal of generation is sent；

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

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

Optionally, before generating reference signal, further includes:

In this method, the optional process for generating and sending reference signal can refer to transmission process shown in fig. 6 in embodiment one.The various optional implementations of this method can refer to the operation of sending device 501 in embodiment two and embodiment three.

[embodiment 22]

Figure 28 is the flow chart for the first reference signal receiving method that the embodiment of the present application 22 provides.As shown in figure 28, this method comprises the following steps:

S2801: receiving reference signal, and reference signal is first kind reference signal；

S2802: signal processing is carried out to the reference signal received；

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 this method, receives and the optional process of processing reference signal can refer to process shown in Fig. 7 in embodiment one.The various optional implementations of this method can refer to the operation of receiving device 502 in embodiment two and embodiment three.

[embodiment 23]

Figure 29 is the flow chart of the sending method for the power indicative information that the embodiment of the present application 23 provides.As shown in figure 29, this method comprises the following steps:

S2901: the first transmission power level of the first signal is obtained；

S2902: if the first transmission power level obtained is greater than transmission power threshold value, the first power indicative information is sent to the receiving device of the first signal, the first power indicative information is used to indicate:

First transmission power level；

Optionally, after the first transmission power level for obtaining the first signal in subframe, further includes:

If the first transmission power level obtained is not more than transmission power threshold value, the second power indicative information is sent to the receiving device of the first signal, the second power indicative information is used to indicate:

First transmission power level.

Optionally, if the first power indicative information is used to indicate power offset value, before sending the first power indicative information to the receiving device of the first signal, further includes: according at least one in following message, determine power offset value:

Reference signal is mapped to the mapping mode on physical resource；

The modulation system of data in the subframe of reference signal place；

The multi-carrier mode of data in the subframe of reference signal place；

System bandwidth；

The bandwidth that data occupy in subframe where reference signal.

The various optional implementations of this method can refer to the processing of sending device 501 in example IV.

[embodiment 24]

Figure 30 is the flow chart of the method for reseptance for the power indicative information that the embodiment of the present application 24 provides.As shown in figure 30, this method comprises the following steps:

S3001: receiving the first power indicative information that the sending device of the first signal is sent, and the first power indicative information is used to indicate: the first transmission power level of the first signal is greater than transmission power threshold value；Or the first power offset value between transmission power level and the second transmission power level of second signal；Or first there are power deviations between transmission power level and the second transmission power level；Or first transmission power level；

S3002: according to the first power indicative information, determine that there are power deviations between the first transmission power level and the second transmission power level of second signal；

S3003: it determines power offset value, and the data in data or the first signal place subframe in the first signal is demodulated according to determining power offset value；

Optionally, if the first power indicative information is used to indicate power offset value, it is determined that power offset value, comprising:

The various optional implementations of this method can refer to the processing of receiving device 502 in example IV.

[embodiment 25]

Figure 31 is the flow chart for the transmission power adjustment method that the embodiment of the present application 25 provides.As shown in figure 31, this method comprises the following steps:

S3101: the first transmission power level of the first signal is obtained；

First signal is used to carry the data in the symbol including reference signal, and second signal is the reference signal in the symbol；

S3102: if the first transmission power level obtained is greater than transmission power threshold value, it then carries out following power adjustment: the transmission power of the first signal being reduced into power adjustment, and the transmission power of second signal is reduced into power adjustment or keeps the transmission power of second signal constant.

Optionally, before carrying out power adjustment, further include: according at least one in following message, determine power adjustment: the bandwidth that data occupy in the multi-carrier mode of data, system bandwidth and subframe where reference signal in subframe where the modulation system of data, reference signal in subframe where reference signal is mapped to the mapping mode on physical resource, reference signal.

The various optional implementations of this method can refer to the operation of sending device 501 in embodiment five.

[embodiment 26]

Figure 32 is the flow chart for second of reference signal sending method that the embodiment of the present application 26 provides.As shown in figure 32, this method comprises the following steps:

S3201: the movement speed of the sending device of the type and/or reference signal for the synchronisation source being synchronized to according to the sending device of reference signal determines that reference signal is first kind reference signal or the second class reference signal；

S3202: reference signal is generated；

S3203: the reference signal of generation is sent；

Optionally, the movement speed of the sending device of the type and/or reference signal for the synchronisation source being synchronized to according to the sending device of reference signal determines that reference signal is first kind reference signal or the second class reference signal, comprising:

In this method, the optional process for sending reference signal can refer to transmission process shown in fig. 6 in embodiment one.The various optional implementations of this method can refer to the operation of sending device 501 in embodiment six.

[embodiment 27]

Figure 33 is the flow chart for second of reference signal receiving method that the embodiment of the present application 27 provides.As shown in figure 33, this method comprises the following steps:

S3301: the type for the reference signal that the sending device of reference signal is sent is determined, the type of reference signal includes: first kind reference signal or the second class reference signal；

S3302: according to the type reception reference signal of determining reference signal；

S3303: signal processing is carried out to received reference signal；

In this method, the optional process for receiving and processing reference signal can refer to process shown in Fig. 7 in embodiment one.The various optional implementations of this method can refer to the operation of receiving device 502 in embodiment six.

To sum up, in the application, on the one hand, in order to guarantee the normal communication between the big communication equipment of frequency departure, the reference signal sent between communication equipment meets following condition:

Wherein, there are two symbols in above-mentioned at least five symbol, it is to guarantee correctly to estimate biggish exemplary frequency deviation values that the intersymbol interval of the two symbols, which is not more than two symbols,.Interval between two symbols comprising reference signal is bigger, the frequency departure that the receiving device of reference signal can accurately be estimated It is worth smaller.

On the other hand, for the PAPR of reference signal usually than the problem caused by the PAPR high of data, the solution including following two schemes provided herein:

It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program product.Therefore, the form of complete hardware embodiment, complete software embodiment or embodiment combining software and hardware aspects can be used in the present invention.Moreover, the form for the computer program product implemented in the computer-usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) that one or more wherein includes computer usable program code can be used in the present invention.

The present invention is that reference is described according to the flowchart and/or the block diagram of the present processes, equipment (system) and computer program product.It should be understood that the combination of process and/or box in each flow and/or block and flowchart and/or the block diagram that can be realized by computer program instructions in flowchart and/or the block diagram.These computer program instructions be can provide to the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to generate a machine, so that generating by the instruction that computer or the processor of other programmable data processing devices execute for realizing the dress for the function of specifying in one or more flows of the flowchart and/or one or more blocks of the block diagram It sets.

These computer program instructions, which may also be stored in, to be able to guide in computer or other programmable data processing devices computer-readable memory operate in a specific manner, so that instruction stored in the computer readable memory generates the manufacture including command device, which realizes the function of specifying in one or more flows of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that series of operation steps are executed on a computer or other programmable device to generate computer implemented processing, thus the step of instruction executed on a computer or other programmable device is provided for realizing the function of specifying in one or more flows of the flowchart and/or one or more blocks of the block diagram.

Although preferred embodiments of the present invention have been described, once a person skilled in the art knows basic creative concepts, then additional changes and modifications can be made to these embodiments.So it includes preferred embodiment and all change and modification for falling into the scope of the invention that the following claims are intended to be interpreted as.

Obviously, those skilled in the art can carry out various modification and variations without departing from spirit and scope to the application.If then the present invention is also intended to include these modifications and variations in this way, these modifications and variations of the application are within the scope of the claims of the present invention and its equivalent technology.

Claims

A kind of sending device of reference signal characterized by comprising

Processing module, for generating reference signal, the reference signal is first kind reference signal；

Sending module, the reference signal for generating the processing module are sent；

Wherein, in the time domain, in each subframe that the first kind reference signal occupies, the first kind reference signal occupies at least five symbols, and there are two symbols at least five symbol, the intersymbol interval of existing described two symbols is not more than two symbols.
Sending device as described in claim 1, which is characterized in that in each time slot of the subframe, the first kind reference signal occupies at least two symbols.
Sending device as claimed in claim 1 or 2, which is characterized in that

On frequency domain, in each resource unit that the first kind reference signal occupies, the reference signal occupies discontinuous multiple subcarriers.
Sending device as claimed in any one of claims 1 to 3, which is characterized in that on frequency domain, in each resource unit that the first kind reference signal occupies, the first kind reference signal occupies at least three subcarriers.
Such as the described in any item sending devices of Claims 1 to 4, which is characterized in that in the time domain, in each subframe that the first kind reference signal occupies, the symbolic number that first reference signal occupies is less than the symbolic number that can be used for transmitting data in the subframe.
Sending device as claimed in any one of claims 1 to 5, which is characterized in that in the time domain, in each of each subframe that the first kind reference signal occupies time slot, the reference signal occupies adjacent multiple symbols.
Sending device as claimed in claim 6, which is characterized in that in each of each subframe that the first kind reference signal occupies time slot, the first kind reference signal occupies two group codes respectively, and each group code includes adjacent multiple symbols.
Sending device as claimed in any one of claims 1 to 5, which is characterized in that

If the subframe that the first kind reference signal occupies is normal CP subframe, the first kind is with reference to letter The symbol occupied in a time slot number in the subframe of occupancy includes:

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 that the first kind reference signal occupies is normal CP subframe, the symbol that the first kind reference signal occupies in a time slot in the subframe of occupancy includes:

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.
Sending device as described in any one of claims 1 to 8, which is characterized in that the subframe that the first kind reference signal occupies includes: synchronous subframe and/or asynchronous subframe；

Include synchronization signal in the synchronous subframe, does not include synchronization signal in the asynchronous subframe.
Sending device as described in any one of claims 1 to 9, which is characterized in that

The receiving device of the sending device and the reference signal is terminal device；Or

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

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

The receiving device of the sending device and the reference signal is the network equipment；
Sending device as claimed in claim 10, which is characterized in that the network equipment includes base station, and the terminal device includes user equipment (UE) or roadside unit RSU.
Sending device as claimed in any one of claims 1 to 11, which is characterized in that in each subframe that the first kind reference signal occupies, last symbol is null symbol GAP.
Such as the described in any item sending devices of claim 1~12, which is characterized in that the first kind reference signal is the reference signal that the same antenna port is sent.
Such as the described in any item sending devices of claim 1~13, which is characterized in that the processing module is also used to: before the generation reference signal,

The movement speed of the sending device of the type and/or reference signal for the synchronisation source being synchronized to according to the sending device of the reference signal determines that the reference signal is the first kind reference signal.
Sending device as claimed in claim 14, which is characterized in that

If the type for the synchronisation source that the sending device of the reference signal is synchronized to is the synchronisation source that synchronization accuracy is lower than precision threshold, or the movement speed of the sending device of the reference signal is higher than movement speed threshold value, it is determined that the reference signal is the first kind reference signal.
A kind of receiving device of reference signal characterized by comprising

Receiving module, for receiving reference signal；

Processing module, the reference signal for receiving to the receiving module carry out signal processing；

Wherein, in the time domain, in each subframe that the first kind reference signal occupies, the first kind reference signal occupies at least five symbols, and there are two symbols at least five symbol, the intersymbol interval of existing described two symbols is not more than two symbols.
Receiving device as claimed in claim 16, which is characterized in that in each time slot of the subframe, the first kind reference signal occupies at least two symbols,
Receiving device as described in claim 16 or 17, which is characterized in that on frequency domain, in each resource unit that the first kind reference signal occupies, the reference signal occupies discontinuous multiple subcarriers.
Such as the described in any item receiving devices of claim 16~18, which is characterized in that on frequency domain, in each resource unit that the first kind reference signal occupies, the first kind reference signal occupies at least three subcarriers.
Such as the described in any item receiving devices of claim 16~19, it is characterized in that, in the time domain, in each subframe that the first kind reference signal occupies, the symbolic number that first reference signal occupies is less than the symbolic number that can be used for transmitting data in the subframe.
Such as the described in any item receiving devices of claim 16~20, which is characterized in that in the time domain, in each of each subframe that the first kind reference signal occupies time slot, the reference signal occupies adjacent multiple symbols.
Receiving device as claimed in claim 21, which is characterized in that in the first kind with reference to letter In number each of each subframe time slot occupied, the first kind reference signal occupies two group codes respectively, and each group code includes adjacent multiple symbols.
Such as the described in any item receiving devices of claim 16~20, which is characterized in that

If the subframe that the first kind reference signal occupies is normal CP subframe, the symbol that the first kind reference signal occupies in a time slot in the subframe of occupancy includes:

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 that the first kind reference signal occupies is normal CP subframe, the symbol that the first kind reference signal occupies in a time slot in the subframe of occupancy includes:

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.
Such as the described in any item receiving devices of claim 16~23, which is characterized in that the subframe that the first kind reference signal occupies includes: synchronous subframe and/or asynchronous subframe；

Include synchronization signal in the synchronous subframe, does not include synchronization signal in the asynchronous subframe.
Such as the described in any item receiving devices of claim 16~24, which is characterized in that

The sending device of the reference signal and the receiving device are terminal device；Or

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

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

The sending device of the reference signal and the receiving device are the network equipment；
Receiving device as claimed in claim 25, which is characterized in that the network equipment includes base station, and the terminal device includes user equipment (UE) or roadside unit RSU.
Such as the described in any item receiving devices of claim 16~26, which is characterized in that in each subframe that the first kind reference signal occupies, last symbol is null symbol GAP.
Such as the described in any item receiving devices of claim 16~27, which is characterized in that the first kind reference signal is the reference signal that the same antenna port is sent.
A kind of sending device of power indicative information characterized by comprising

Processing module, for obtaining the first transmission power level of the first signal；

Sending module, when first transmission power level for obtaining in the processing module is greater than transmission power threshold value, the receiving device of the first signal of Xiang Suoshu sends the first power indicative information, and first power indicative information is used to indicate:

First transmission power level is greater than the transmission power threshold value；Or

Power offset value between first transmission power level and the second transmission power level of second signal；Or

There are power deviations between first transmission power level and second transmission power level；Or

First transmission power level；

First signal includes data in the symbol of reference signal for carrying not, and the second signal is the reference signal in the symbol where first signal in subframe including the reference signal；Or

First signal is used to carry the data in the symbol including the reference signal, and the second signal is the reference signal in the symbol.
Sending device as claimed in claim 29, it is characterized in that, the sending module is also used to: after the first transmission power level that the processing module obtains the first signal in subframe, if first transmission power level obtained is not more than the transmission power threshold value, the second power indicative information then is sent to the receiving device of first signal, second power indicative information is used to indicate:

First transmission power level is not more than the transmission power threshold value；Or

Power deviation is not present between first transmission power level and second transmission power level；Or

First transmission power level.
Sending device as described in claim 29 or 30, it is characterized in that, if first power indicative information is used to indicate the power offset value, then the processing module is also used to: before sending the first power indicative information to the receiving device of first signal, according at least one in following message, the power offset value is determined:

The reference signal is mapped to the mapping mode on physical resource；

The modulation system of data in the subframe of the reference signal place；

The multi-carrier mode of data in the subframe of the reference signal place；

System bandwidth；

The bandwidth that data occupy in subframe where the reference signal.
A kind of receiving device of power indicative information characterized by comprising

Receiving module, the first power indicative information that the sending device for receiving the first signal is sent, first power indicative information are used to indicate: the first transmission power level of first signal is greater than the transmission power threshold value；Or the power offset value between first transmission power level and the second transmission power level of second signal；Or there are power deviations between first transmission power level and second transmission power level；Or first transmission power level；

Processing module, for determining that there are power deviations between first transmission power level and the second transmission power level of second signal according to first power indicative information；

It determines the power offset value, and the data in data or first signal place subframe in first signal is demodulated according to the determining power offset value；

Wherein, first signal includes data in the symbol of reference signal for carrying not, and the second signal is the reference signal in the symbol where first signal in subframe including the reference signal；Or

First signal is used to carry the data in the symbol including the reference signal, and the second signal is the reference signal in the symbol.
Receiving device as claimed in claim 32, which is characterized in that the processing module is specifically used for: if first power indicative information is used to indicate the power offset value,

According at least one in following message, the power offset value is determined: the bandwidth that data occupy in the multi-carrier mode of data, system bandwidth and subframe where the reference signal in subframe where the modulation system of data, the reference signal in subframe where the reference signal is mapped to the mapping mode on physical resource, the reference signal.
A kind of transmission power adjustment equipment characterized by comprising

Performance number obtains module, for obtaining the first transmission power level of the first signal；

First signal includes data in the symbol of reference signal for carrying not, and the second signal is the reference signal in the symbol where first signal in subframe including the reference signal；Or first signal is used to carry the data in the symbol including the reference signal, the second signal is the reference signal in the symbol；

Power regulation module, for when the performance number obtains first transmission power level that module obtains and is greater than transmission power threshold value, it carries out following power adjustment: the transmission power of first signal being reduced into power adjustment, and the transmission power of the second signal is reduced into the power adjustment or keeps the transmission power of the second signal constant.
Equipment as claimed in claim 34, which is characterized in that the power regulation module is also used to: according at least one in following message before carrying out the power adjustment, the power adjustment is determined:

The bandwidth that data occupy in the multi-carrier mode of data, system bandwidth and subframe where the reference signal in subframe where the modulation system of data, the reference signal in subframe where the reference signal is mapped to the mapping mode on physical resource, the reference signal.
A kind of sending device of reference signal characterized by comprising

The movement speed of the sending device of processing module, the type of the synchronisation source for being synchronized to according to the sending device and/or the reference signal determines that the reference signal is the first kind reference signal or the second class reference signal；And generate the reference signal；

Sending module, the reference signal for generating the processing module are sent；

The symbolic number that the first kind reference signal occupies in a subframe is more than the symbolic number that the second class reference signal occupies in a subframe.
Sending device as claimed in claim 36, which is characterized in that the processing module is specifically used for:

If the type for the synchronisation source that the sending device of the reference signal is synchronized to is the synchronisation source that synchronization accuracy is lower than precision threshold, or the movement speed of the sending device of the reference signal is higher than movement speed threshold value, it is determined that the reference signal is the first kind reference signal；

If the type for the synchronisation source that the sending device of the reference signal is synchronized to is not less than institute for synchronization accuracy The synchronisation source of precision threshold is stated, and the movement speed of the sending device of the reference signal is not higher than the movement speed threshold value, it is determined that the reference signal is the second class reference signal.
A kind of receiving device of reference signal characterized by comprising

Processing module, the type of the reference signal of the sending device transmission for determining reference signal, the type of the reference signal includes: first kind reference signal or the second class reference signal；

Receiving module, for reference signal described in the type reception according to the determining reference signal of the processing module；

The processing module is also used to: the reference signal received to the receiving module carries out signal processing；

The symbolic number that the first kind reference signal occupies in a subframe is more than the symbolic number that the second class reference signal occupies in a subframe.
A kind of sending method of reference signal characterized by comprising

Reference signal is generated, the reference signal is first kind reference signal；

The reference signal of generation is sent；

Wherein, in the time domain, in each subframe that the first kind reference signal occupies, the first kind reference signal occupies at least five symbols, and there are two symbols at least five symbol, the intersymbol interval of existing described two symbols is not more than two symbols.
Method as claimed in claim 39, which is characterized in that in each time slot of the subframe, the first kind reference signal occupies at least two symbols.
Method as described in claim 39 or 40, which is characterized in that

On frequency domain, in each resource unit that the first kind reference signal occupies, the reference signal occupies discontinuous multiple subcarriers.
Such as the described in any item methods of claim 39~41, which is characterized in that on frequency domain, in each resource unit that the first kind reference signal occupies, the first kind reference signal occupies at least three subcarriers.
Such as the described in any item methods of claim 39~42, which is characterized in that in the time domain, in each subframe that the first kind reference signal occupies, the symbolic number of the first reference signal occupancy Less than the symbolic number that can be used for transmitting data in the subframe.
Such as the described in any item methods of claim 39~43, which is characterized in that in the time domain, in each of each subframe that the first kind reference signal occupies time slot, the reference signal occupies adjacent multiple symbols.
Method as claimed in claim 44, which is characterized in that in each of each subframe that the first kind reference signal occupies time slot, the first kind reference signal occupies two group codes respectively, and each group code includes adjacent multiple symbols.
Such as the described in any item methods of claim 39~43, which is characterized in that

If the subframe that the first kind reference signal occupies is normal CP subframe, the symbol that the first kind reference signal occupies in a time slot in the subframe of occupancy includes:

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 that the first kind reference signal occupies is normal CP subframe, the symbol that the first kind reference signal occupies in a time slot in the subframe of occupancy includes:

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.
Such as the described in any item methods of claim 39~46, which is characterized in that the subframe that the first kind reference signal occupies includes: synchronous subframe and/or asynchronous subframe；

Include synchronization signal in the synchronous subframe, does not include synchronization signal in the asynchronous subframe.
Such as the described in any item methods of claim 39~47, which is characterized in that

The sending device and receiving device of the reference signal are terminal device；Or

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

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

The sending device and receiving device of the reference signal are the network equipment；
Method as claimed in claim 48, which is characterized in that the network equipment includes base station, and the terminal device includes user equipment (UE) or roadside unit RSU.
Such as the described in any item methods of claim 39~49, which is characterized in that in each subframe that the first kind reference signal occupies, last symbol is null symbol GAP.
Such as the described in any item methods of claim 39~50, which is characterized in that the first kind reference signal is the reference signal that the same antenna port is sent.
Such as the described in any item methods of claim 39~51, which is characterized in that before the generation reference signal, further includes:

The movement speed of the sending device of the type and/or reference signal for the synchronisation source being synchronized to according to the sending device of the reference signal determines that the reference signal is the first kind reference signal.
Method as claimed in claim 52, which is characterized in that

If the type for the synchronisation source that the sending device of the reference signal is synchronized to is the synchronisation source that synchronization accuracy is lower than precision threshold, or the movement speed of the sending device of the reference signal is higher than movement speed threshold value, it is determined that the reference signal is the first kind reference signal.
A kind of method of reseptance of reference signal characterized by comprising

Reference signal is received, the reference signal is first kind reference signal；

Signal processing is carried out to the reference signal received；

Wherein, in the time domain, in each subframe that the first kind reference signal occupies, the first kind reference signal occupies at least five symbols, and there are two symbols at least five symbol, the intersymbol interval of existing described two symbols is not more than two symbols.
Method as claimed in claim 54, which is characterized in that in each time slot of the subframe, the first kind reference signal occupies at least two symbols,
Method as described in claim 54 or 55, which is characterized in that on frequency domain, in each resource unit that the first kind reference signal occupies, the reference signal occupies discontinuous multiple Subcarrier.
Such as the described in any item methods of claim 54~56, which is characterized in that on frequency domain, in each resource unit that the first kind reference signal occupies, the first kind reference signal occupies at least three subcarriers.
Such as the described in any item methods of claim 54~57, which is characterized in that in the time domain, in each subframe that the first kind reference signal occupies, the symbolic number that first reference signal occupies is less than the symbolic number that can be used for transmitting data in the subframe.
Such as the described in any item methods of claim 54~58, which is characterized in that in the time domain, in each of each subframe that the first kind reference signal occupies time slot, the reference signal occupies adjacent multiple symbols.
Method as claimed in claim 59, which is characterized in that in each of each subframe that the first kind reference signal occupies time slot, the first kind reference signal occupies two group codes respectively, and each group code includes adjacent multiple symbols.
Such as the described in any item methods of claim 54~58, which is characterized in that

If the subframe that the first kind reference signal occupies is normal CP subframe, the symbol that the first kind reference signal occupies in a time slot in the subframe of occupancy includes:

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 that the first kind reference signal occupies is normal CP subframe, the symbol that the first kind reference signal occupies in a time slot in the subframe of occupancy includes:

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.
Such as the described in any item methods of claim 54~61, which is characterized in that the first kind ginseng The subframe for examining signal occupancy includes: synchronous subframe and/or asynchronous subframe；

Include synchronization signal in the synchronous subframe, does not include synchronization signal in the asynchronous subframe.
Such as the described in any item methods of claim 54~62, which is characterized in that

The sending device and receiving device of the reference signal are terminal device；Or

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

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

The sending device and receiving device of the reference signal are the network equipment；
Method as described in claim 63, which is characterized in that the network equipment includes base station, and the terminal device includes user equipment (UE) or roadside unit RSU.
Such as the described in any item methods of claim 54~64, which is characterized in that in each subframe that the first kind reference signal occupies, last symbol is null symbol GAP.
Such as the described in any item methods of claim 54~65, which is characterized in that the first kind reference signal is the reference signal that the same antenna port is sent.
A kind of wireless communication system characterized by comprising

Sending device sends the reference signal of generation for generating reference signal；

Receiving device, the reference signal sent for receiving the sending device, and signal processing is carried out to the received reference signal；

The reference signal is first kind reference signal；

Wherein, in the time domain, in each subframe that the first kind reference signal occupies, the first kind reference signal occupies at least five symbols, and there are two symbols at least five symbol, the intersymbol interval of existing described two symbols is not more than two symbols.
A kind of sending method of power indicative information characterized by comprising

Obtain the first transmission power level of the first signal；

If first transmission power level obtained is greater than transmission power threshold value, the first power indicative information is sent to the receiving device of first signal, first power indicative information is used to indicate:

First transmission power level is greater than the transmission power threshold value；Or

Power offset value between first transmission power level and the second transmission power level of second signal；Or

There are power deviations between first transmission power level and second transmission power level；Or

First transmission power level；

First signal includes data in the symbol of reference signal for carrying not, and the second signal is the reference signal in the symbol where first signal in subframe including the reference signal；Or

First signal is used to carry the data in the symbol including the reference signal, and the second signal is the reference signal in the symbol.
Method as recited in claim 68, which is characterized in that after the first transmission power level for obtaining the first signal in subframe, further includes:

If first transmission power level obtained is not more than the transmission power threshold value, the second power indicative information is sent to the receiving device of first signal, second power indicative information is used to indicate:

First transmission power level is not more than the transmission power threshold value；Or

Power deviation is not present between first transmission power level and second transmission power level；Or

First transmission power level.
Method as described in claim 68 or 69, it is characterized in that, if first power indicative information is used to indicate the power offset value, then before sending the first power indicative information to the receiving device of first signal, further include: according at least one in following message, determine the power offset value:

The reference signal is mapped to the mapping mode on physical resource；

The modulation system of data in the subframe of the reference signal place；

The multi-carrier mode of data in the subframe of the reference signal place；

System bandwidth；

The bandwidth that data occupy in subframe where the reference signal.
A kind of method of reseptance of power indicative information characterized by comprising

Receive the first power indicative information that the sending device of the first signal is sent, first power indication Information is used to indicate: the first transmission power level of first signal is greater than the transmission power threshold value；Or the power offset value between first transmission power level and the second transmission power level of second signal；Or there are power deviations between first transmission power level and second transmission power level；Or first transmission power level；

According to first power indicative information, determine that there are power deviations between first transmission power level and the second transmission power level of second signal；

It determines the power offset value, and the data in data or first signal place subframe in first signal is demodulated according to the determining power offset value；

Wherein, first signal includes data in the symbol of reference signal for carrying not, and the second signal is the reference signal in the symbol where first signal in subframe including the reference signal；Or

First signal is used to carry the data in the symbol including the reference signal, and the second signal is the reference signal in the symbol.
Method as described in claim 71, which is characterized in that if first power indicative information is used to indicate the power offset value, the determination power offset value, comprising:

According at least one in following message, the power offset value is determined: the bandwidth that data occupy in the multi-carrier mode of data, system bandwidth and subframe where the reference signal in subframe where the modulation system of data, the reference signal in subframe where the reference signal is mapped to the mapping mode on physical resource, the reference signal.
A kind of wireless communication system characterized by comprising

Sending device, when being greater than transmission power threshold value for the first transmission power level in the first signal, send the first power indicative information to receiving device, first power indicative information is used to indicate: first transmission power level is greater than the transmission power threshold value；Or the power offset value between first transmission power level and the second transmission power level of second signal；Or there are power deviations between first transmission power level and second transmission power level；Or first transmission power level；

The receiving device, first power indicative information sent for receiving the sending device, and according to first power indicative information, determine the second of first transmission power level and second signal There are power deviations between transmission power level, and determine the power offset value, and demodulate the data in data or first signal place subframe in first signal according to the determining power offset value；

Wherein, first signal includes data in the symbol of reference signal for carrying not, and the second signal is the reference signal in the symbol where first signal in subframe including the reference signal；Or

First signal is used to carry the data in the symbol including the reference signal, and the second signal is the reference signal in the symbol.
A kind of transmission power adjustment method characterized by comprising

Obtain the first transmission power level of the first signal；

First signal includes data in the symbol of reference signal for carrying not, and the second signal is the reference signal in the symbol where first signal in subframe including the reference signal；Or

First signal is used to carry the data in the symbol including the reference signal, and the second signal is the reference signal in the symbol；

If first transmission power level obtained is greater than transmission power threshold value, it then carries out following power adjustment: the transmission power of first signal being reduced into power adjustment, and the transmission power of the second signal is reduced into the power adjustment or keeps the transmission power of the second signal constant.
Method as described in claim 74, which is characterized in that

Before carrying out the power adjustment, further include: according at least one in following message, determine the power adjustment: the bandwidth that data occupy in the multi-carrier mode of data, system bandwidth and subframe where the reference signal in subframe where the modulation system of data, the reference signal in subframe where the reference signal is mapped to the mapping mode on physical resource, the reference signal.
A kind of sending method of reference signal characterized by comprising

The movement speed of the sending device of the type and/or reference signal for the synchronisation source being synchronized to according to the sending device of reference signal determines that the reference signal is first kind reference signal or the second class reference signal；

Generate the reference signal；

The reference signal of generation is sent；

The symbolic number that the first kind reference signal occupies in a subframe is more than the symbolic number that the second class reference signal occupies in a subframe.
Method as described in claim 76, it is characterized in that, the movement speed of the sending device of the type and/or reference signal for the synchronisation source being synchronized to according to the sending device of reference signal determines that the reference signal is the first kind reference signal or the second class reference signal, comprising:

If the type for the synchronisation source that the sending device of the reference signal is synchronized to is the synchronisation source that synchronization accuracy is lower than precision threshold, or the movement speed of the sending device of the reference signal is higher than movement speed threshold value, it is determined that the reference signal is the first kind reference signal；

If the type for the synchronisation source that the sending device of the reference signal is synchronized to is the synchronisation source that synchronization accuracy is not less than the precision threshold, and the movement speed of the sending device of the reference signal is not higher than the movement speed threshold value, it is determined that the reference signal is the second class reference signal.
A kind of method of reseptance of reference signal characterized by comprising

Determine the type for the reference signal that the sending device of reference signal is sent, the type of the reference signal includes: first kind reference signal or the second class reference signal；

Reference signal described in type reception according to the determining reference signal；

Signal processing is carried out to the received reference signal；

The symbolic number that the first kind reference signal occupies in a subframe is more than the symbolic number that the second class reference signal occupies in a subframe.
A kind of wireless communication system characterized by comprising

Sending device, the movement speed of the type of synchronisation source for being synchronized to according to the sending device and/or the sending device, it determines that reference signal to be sent is first kind reference signal or the second class reference signal, generates the reference signal, and the reference signal of generation is sent；

Receiving device for determining the type of the reference signal, and according to reference signal described in the type reception of the determining reference signal, and carries out signal processing to the received reference signal；

The symbolic number that the first kind reference signal occupies in a subframe is more than the symbolic number that the second class reference signal occupies in a subframe.