CN104812029A - Power control method in LTE system and user equipment UE - Google Patents

Abstract

The invention discloses a power control method in an LTE system and a piece of user equipment UE. The method comprises the following steps: a piece of UE determines the transmitting power of a synchronization signal to be transmitted according to a corresponding preset power control method; and the UE transmits the synchronization signal to be transmitted to other UE according to the determined transmitting power. By adopting the method, a synchronization signal transmitted by a piece of D2D UE does not cause serious interference to uplink signals and uplink channels of the cell and neighboring cells, and both the D2D UE and cellular UE can work normally. Moreover, a piece of out-of-coverage D2D UE can be helped to establish synchronization, and the D2D UE does not consume a lot of battery power because of synchronization signal transmitting.

Description

Poewr control method in LTE system and user equipment (UE)

Technical field

The application relates to wireless communication technology field, the Poewr control method particularly in a kind of LTE system and user equipment (UE).

Background technology

Current Long Term Evolution (Long Term Evolution, LTE) in system, subscriber equipment (UserEquipment, UE) master sync signal sent by base stations detected (eNB) and auxiliary synchronous signals, obtain subframe timing and the radio frames timing of community, realize synchronous with the downgoing time of eNB.In this case, only have eNB can send master sync signal and auxiliary synchronous signals, the power control sending master sync signal and auxiliary synchronous signals is the problem of implementation of base station, does not relate to the behavior of UE, the description therefore not for this problem in standard.

But in yet some other cases, UE also can send synchronizing signal.The synchronizing signal that UE sends may be the signal that the master sync signal that sends with base station is identical with auxiliary synchronous signals, also may be the synchronizing signal or synchronizing channel that newly define.Such as, at support D2D(Device-to-Device equipment to equipment), except base station can send synchronizing signal, in order to set up synchronous with other UE, do not have the UE of the network coverage (out-of-coverage) to send synchronizing signal; And in order to help the synchronizing signal not having the UE of the network coverage to be sent by the UE of the network coverage (in coverage) to set up synchronous with eNB, the UE that there is the network coverage (in coverage) also can send synchronizing information.Mentioned here do not have the network coverage and the network coverage all to determine according to the definition in standard, such as, the signal to noise ratio that UE measures is less than-6dB, just thinks that this UE does not have the network coverage, the signal to noise ratio that UE measures is more than or equal to-6dB, just thinks that this UE exists the network coverage.For convenience, hereinafter will there is no the UE of the network coverage referred to as OCU, will the UE of the network coverage be there is referred to as ICU.

Because the D2D communication under LTE MPS process takies ascending resource, i.e. FDD(FrequencyDivision Duplexing, Frequency Division Duplexing (FDD)) up-link carrier of community or TDD(Time DivisionDuplexing, time division duplex) sub-frame of uplink of community, therefore, namely D2D UE(carries out the UE of D2D communication) synchronizing signal that the sends cellular communication signal that may send with other UE in same community and adjacent cell or channel on same sub-frame of uplink, thus cause interference mutually.Such as, the PUCCH(Physical UplinkControl CHannel that other UE in the synchronizing signal Hui Duizhe community that D2D UE sends send, physical uplink control channel), PUSCH(Physical Uplink SharedChannel, Physical Uplink Shared Channel) signal causes interference, as shown in Figure 1.In addition, if the transmitted power that D2DUE transmission synchronizing signal uses is excessive, also power consumption is compared.

Summary of the invention

This application provides the Poewr control method in a kind of LTE system and user equipment (UE), be intended to the problem solving interference and the power consumption existed in prior art.

The technical scheme of the application is as follows:

On the one hand, provide the Poewr control method in a kind of LTE system, the method is applied to UE, and the method comprises:

UE, according to the predetermined power control method of correspondence, determines the transmitted power of the synchronizing signal that will send;

UE, according to the transmitted power determined, sends this synchronizing signal that will send to other UE;

Wherein, this synchronizing signal that will send be OCU when not receiving the synchronizing signal that arbitrary UE sends, to ICU send first kind synchronizing signal;

Or this synchronizing signal that will send is ICU after receiving the first kind synchronizing signal that OCU sends, the Equations of The Second Kind synchronizing signal of transmission;

Or this synchronizing signal that will send is OCU after receiving the Equations of The Second Kind synchronizing signal that ICU sends, the 3rd homochronousness signal of transmission;

Or this synchronizing signal that will send is OCU after receiving the first kind synchronizing signal or the 3rd homochronousness signal that other OCU send, the 4th homochronousness signal of transmission.

On the other hand, additionally provide the UE in a kind of LTE system, this UE comprises:

Determination module, for the predetermined power control method according to correspondence, determines the transmitted power of the synchronizing signal that will send;

Sending module, for the transmitted power determined according to determination module, sends this synchronizing signal that will send to other UE;

Wherein, this synchronizing signal that will send be OCU when not receiving the synchronizing signal that arbitrary UE sends, to ICU send first kind synchronizing signal;

Or this synchronizing signal that will send is ICU after receiving the first kind synchronizing signal that OCU sends, the Equations of The Second Kind synchronizing signal of transmission;

Or this synchronizing signal that will send is OCU after receiving the Equations of The Second Kind synchronizing signal that ICU sends, the 3rd homochronousness signal of transmission;

Or this synchronizing signal that will send is OCU after receiving the first kind synchronizing signal or the 3rd homochronousness signal that other OCU send, the 4th homochronousness signal of transmission.

In the above technical scheme of the application, in the environment that D2D UE and honeycomb UE coexists, carry out suitable power by all kinds of synchronizing signals sent D2D UE to control, the synchronizing signal that D2D UE can be made to send can not cause serious interference to the upward signal of this community and adjacent cell and up channel, and D2D UE and honeycomb UE all can normally work; Meanwhile, can help again not have the D2D UE of the network coverage to set up synchronous, and a large amount of consume battery power that D2D UE can not be made because sending synchronizing signal.

Accompanying drawing explanation

Fig. 1 is in D2D communication network, and synchronizing signal and cellular network signals cause mutually the schematic diagram of interference;

Fig. 2 is the first kind synchronizing signal of the application one embodiment, the relation schematic diagram between Equations of The Second Kind synchronizing signal and the 3rd homochronousness signal;

Fig. 3 is the first kind synchronizing signal of the application one embodiment, the relation schematic diagram between the 3rd homochronousness signal and the 4th homochronousness signal;

Fig. 4 is the flow chart of the Poewr control method in the LTE system of the application one embodiment;

Fig. 5 is the flow chart of the Poewr control method in the LTE system of another embodiment of the application;

Fig. 6 is the structural representation of the UE in the LTE system of the application one embodiment.

Embodiment

In order to solve the problem of interference and the power consumption existed in prior art, in the application's following examples, provide the Poewr control method in a kind of LTE system, and a kind of can UE to apply the method.

In the embodiment of the present application, be described to be applied in D2D communication.

The synchronizing signal that D2D UE sends can be divided into following four classes:

First kind synchronizing signal: OCU(does not have the UE of the network coverage) when not receiving the synchronizing signal that arbitrary UE sends, there is the UE of the network coverage to ICU() synchronizing signal that sends;

Equations of The Second Kind synchronizing signal: ICU after receiving the first kind synchronizing signal that OCU sends, the synchronizing signal of transmission;

3rd homochronousness signal: OCU after receiving the Equations of The Second Kind synchronizing signal that ICU sends, the synchronizing signal of transmission;

4th homochronousness signal: OCU after receiving the first kind synchronizing signal or the 3rd homochronousness signal that other OCU send, the synchronizing signal of transmission.

Visible, the relation between above-mentioned four homochronousness signals, as shown in Figures 2 and 3.

As shown in Figure 2, OCU, when not receiving the synchronizing signal that arbitrary D2D UE sends, sends first kind synchronizing signal; After ICU receives the first kind synchronizing signal of OCU transmission, send Equations of The Second Kind synchronizing signal; After OCU receives the Equations of The Second Kind synchronizing signal of ICU transmission, send the 3rd homochronousness signal.

In addition, as shown in Figure 3, OCU receive other OCU send first kind synchronizing signal or the 3rd homochronousness signal after, send the 4th homochronousness signal.

In order to realize the control of the transmitted power to above-mentioned four homochronousness signals, the embodiment of the present application proposes the Poewr control method in a kind of LTE system, and the method is performed by D2D UE.As shown in Figure 4, comprise the following steps:

Step S102, UE, according to the predetermined power control method of correspondence, determine the transmitted power of the synchronizing signal that will send;

Step S104, UE, according to the transmitted power determined in step S102, send this synchronizing signal that will send to other UE;

Wherein, this synchronizing signal that will send can be the arbitrary homochronousness signal in above-mentioned four homochronousness signals.

In the present embodiment method, in the environment that D2D UE and honeycomb UE coexists, carry out suitable power by all kinds of synchronizing signals sent D2D UE to control, the synchronizing signal that D2D UE can be made to send can not cause serious interference to the upward signal of this community and adjacent cell and up channel, and D2D UE and honeycomb UE all can normally work; Meanwhile, can help again not have the D2D UE of the network coverage to set up synchronous, and a large amount of consume battery power that D2D UE can not be made because sending synchronizing signal.

Below respectively by embodiment one to embodiment five, to describe in detail in step S102 for the different synchronizing signal that will send, determine the concrete grammar of transmitted power.

For D2D UE, dissimilar traffic demands may be had, such as, the traffic demands of the traffic demands of public safety (PublicSafety) aspect or not common safety (Non-Public Safety) aspect.The synchronizing signal sent for these two kinds of traffic demands can be identical, to simplify the realization of UE; Or the synchronizing signal sent for these two kinds of traffic demands also can be not identical, the synchronizing signal like this by detecting just can determine for be which kind of communication service.

Embodiment one

When the signal that will send is first kind synchronizing signal, in step s 102, determine that the concrete grammar of the transmitted power of the first kind synchronizing signal that will send can adopt in following methods any one.

Method one:

For dissimilar communication service, the transmitted power of the first kind synchronizing signal that D2D UE sends may be different.Because for the communication service of public safety aspect, set up synchronous demand relatively more urgent, therefore the transmitted power of first kind synchronizing signal is relatively larger; And for the communication service of not common secure context, set up synchronous demand not too urgent, therefore the transmitted power of first kind synchronizing signal can be relatively smaller.

Such as, directly the transmitted power defined for the first kind synchronizing signal of the communication service of public safety aspect is: UE, for the maximum transmit power of the communication service of public safety aspect, such as, is 31dBm.

And the transmitted power of first kind synchronizing signal for the communication service of not common secure context, a kind of defining method is: this transmitted power equals the maximum transmit power of UE for the communication service of not common secure context, such as, is 23dBm.Another kind of defining method is: directly this transmitted power of definition is fixed value, such as, this fixed value be according to D2D UE between the transmitted power that calculates of expectation communication distance.Such as, suppose that the expectation communication distance between D2D UE is 70 meters, suitable transmitted power can be calculated according to this distance.

Method two:

The transmitted power of direct definition first kind synchronizing signal is the maximum transmit power of UE, and such as, the maximum transmit power of UE is 23dBm, or 31dBm.

Method three:

The transmitted power of direct definition first kind synchronizing signal is fixed value, such as, this fixed value be according to D2D UE between the transmitted power that calculates of expectation communication distance.Such as, suppose that the expectation communication distance between D2D UE is 70 meters, suitable transmitted power can be calculated according to this distance.

Method four:

In this method, determine that the concrete grammar of the transmitted power of first kind synchronizing signal comprises the following steps:

Step 11: the initial transmission power determining first kind synchronizing signal, the initial transmission power that directly can define first kind synchronizing signal is fixed value;

Step 12: from send the initial time of first kind synchronizing signal according to initial transmission power, following operation is performed, until the transmitted power that have received Equations of The Second Kind synchronizing signal that ICU sends or first kind synchronizing signal reaches the maximum transmit power of UE according to prefixed time interval:

Judge whether to have received the Equations of The Second Kind synchronizing signal that ICU sends, if do not receive, then the transmitted power of first kind synchronizing signal is increased a preset increments value.

That is, D2D UE first sends first kind synchronizing signal according to initial transmission power, if within a preset time interval, do not receive the Equations of The Second Kind synchronizing signal from ICU yet, then the transmitted power of first kind synchronizing signal is increased a preset increments value, again through prefixed time interval, if do not receive the Equations of The Second Kind synchronizing signal from ICU yet, then again the transmitted power of first kind synchronizing signal is increased a preset increments value, by that analogy, until receive the Equations of The Second Kind synchronizing signal from ICU, or the transmitted power of first kind synchronizing signal reaches the maximum transmit power of UE.

Like this, transmitted power can be saved as much as possible, again can by constantly increasing transmitted power to set up synchronous object.

Embodiment two:

When the synchronizing signal that will send is Equations of The Second Kind synchronizing signal, in step s 102, determine that the concrete grammar of the transmitted power of the Equations of The Second Kind synchronizing signal that will send can adopt in following methods any one.

Method one:

If what D2D UE received is the first kind synchronizing signal comprising the traffic demands of public safety aspect that OCU sends, then the transmitted power of Equations of The Second Kind synchronizing signal is relatively larger; If what receive is the first kind synchronizing signal comprising the traffic demands of not common secure context that OCU sends, then the transmitted power of Equations of The Second Kind synchronizing signal can be relatively smaller.

Such as, for the Equations of The Second Kind synchronizing signal that the D2D UE of the traffic demands receiving public safety aspect sends, the transmitted power of direct definition now Equations of The Second Kind synchronizing signal is: this UE, for the maximum transmit power of the communication service of public safety aspect, such as, is 31dBm.

And for receiving the D2D UE of traffic demands of not common secure context, the transmitted power of its Equations of The Second Kind synchronizing signal sent, a kind of defining method is: this transmitted power equals the maximum transmit power of this UE for the communication service of not common secure context, such as, is 23dBm.Another kind of defining method is: the transmitted power directly defining now Equations of The Second Kind synchronizing signal is fixed value, such as, this fixed value be according to D2D UE between the transmitted power that calculates of expectation communication distance, as supposed, the expectation communication distance between D2D UE is 70 meters, can calculate suitable transmitted power according to this distance.

Method two:

The transmitted power of direct definition Equations of The Second Kind synchronizing signal is the maximum transmit power of UE, such as, is 23dBm, or 31dBm.

Method three:

The transmitted power of direct definition Equations of The Second Kind synchronizing signal is fixed value, such as, this fixed value be according to D2D UE between the transmitted power that calculates of expectation communication distance, if the expectation communication distance between hypothesis D2D UE is 70 meters, suitable transmitted power can be calculated according to this distance.

Method four:

D2D UE, according to the path loss of the first kind synchronizing signal received, determines the transmitted power of Equations of The Second Kind synchronizing signal.Concrete, if the transmitted power of first kind synchronizing signal is by standard definition, then this D2D UE is according to the transmission power value of standard determination first kind synchronizing signal, this transmission power value is used to deduct the received signal strength of first kind synchronizing signal, the path loss of first kind synchronizing signal can be obtained, be designated as PL.Suppose, synchronizing signal target received power is P0_SS, then the transmitted power P_SS=P0_SS+PL of Equations of The Second Kind synchronizing signal.

Wherein, the value of P0_SS directly can be defined by standard, and for the D2D UE having different communication business demand, P0_SS may be different, because for the communication service of public safety aspect, set up synchronous demand relatively more urgent, therefore P0_SS may be larger; And for the communication service of not common secure context, set up synchronous demand not too urgent, therefore P0_SS may be relatively smaller.Or, also may for the D2D UE having different communication business demand, P0_SS is identical.

In this method, according to the path loss of the first kind synchronizing signal received, calculate the transmitted power of Equations of The Second Kind synchronizing signal, more when not wasting transmitted power, well meet and setting up synchronous demand.

Method five:

In this method, determine that the concrete grammar of the transmitted power of Equations of The Second Kind synchronizing signal comprises the following steps:

Step 21: the initial transmission power determining Equations of The Second Kind synchronizing signal;

Initial transmission power can in the following ways in any one determine:

The path loss of the first kind synchronizing signal that mode one, basis receive is determined.Concrete, if the transmitted power of first kind synchronizing signal is by standard definition, then D2D UE is according to the transmission power value of standard determination first kind synchronizing signal, the received signal strength using this transmission power value to deduct first kind synchronizing signal can obtain the path loss of first kind synchronizing signal, is designated as PL.Suppose, synchronizing signal target received power is P0_SS, then determine the initial transmission power P_SS=P0_SS+PL of Equations of The Second Kind synchronizing signal.

Wherein, the value of P0_SS directly can be defined by standard, and for having the D2DUE of different business demand, P0_SS may be different, because for the communication service of public safety aspect, set up synchronous demand relatively more urgent, therefore P0_SS may be larger; And for the communication service of not common secure context, set up synchronous demand not too urgent, therefore P0_SS may be relatively smaller.Or, also may for the D2D UE having different communication business demand, P0_SS is identical.

Mode two, directly defined the initial transmission power of Equations of The Second Kind synchronizing signal by high-level signaling or agreement.

Step 22: from send the initial time of Equations of The Second Kind synchronizing signal according to initial transmission power, following operation is performed, until the transmitted power that have received the 3rd homochronousness signal that OCU sends or Equations of The Second Kind synchronizing signal reaches the maximum transmit power of UE according to prefixed time interval:

Judge whether to have received the 3rd homochronousness signal that OCU sends, if do not receive, then the transmitted power of Equations of The Second Kind synchronizing signal is increased preset increments value.

That is, first send Equations of The Second Kind synchronizing signal according to initial transmission power, if within a preset time interval, do not receive the 3rd homochronousness signal from OCU yet, then the transmitted power of Equations of The Second Kind synchronizing signal is increased a preset increments value, again through prefixed time interval, if still do not receive the 3rd homochronousness signal from OCU, then again the transmitted power of Equations of The Second Kind synchronizing signal is increased a preset increments value, by that analogy, until receive the maximum transmit power reaching UE from the 3rd homochronousness signal of OCU or Equations of The Second Kind synchronizing signal.

When UE receives the 3rd homochronousness signal from OCU, the transmitted power of Equations of The Second Kind synchronizing signal remains the transmitted power of current Equations of The Second Kind synchronizing signal.When the transmitted power of the Equations of The Second Kind synchronizing signal that UE sends reaches the maximum transmit power of UE, if do not receive the 3rd homochronousness signal from OCU yet, after then continuing to send Equations of The Second Kind synchronizing signal a period of time with the maximum transmit power of UE, stop sending Equations of The Second Kind synchronizing signal.

In this method, according to the path loss of the first kind synchronizing signal received, calculate the initial transmission power of Equations of The Second Kind synchronizing signal, this initial transmission power is made relatively to set up synchronous demand, Equations of The Second Kind synchronizing signal is sent by the method increasing transmitted power gradually, transmitted power can be saved as much as possible, can be reached by continuous growth transmitted power again and set up synchronous object.

Embodiment three

When the synchronizing signal that will send is Equations of The Second Kind synchronizing signal, in step s 102, determine that the concrete grammar of the transmitted power of the Equations of The Second Kind synchronizing signal that will send can adopt in following methods any one.

Because Equations of The Second Kind synchronizing signal is that ICU sends, therefore, when ICU and cellular network remain connection status, the Equations of The Second Kind synchronizing signal that this UE sends is relevant to the transmitted power of the cellular uplink channel of UE.

Method one:

When D2D UE receive be OCU send comprise the first kind synchronizing signal of the traffic demands of public safety aspect time, the transmitted power of Equations of The Second Kind synchronizing signal is relatively larger; And when receive be OCU send comprise the first kind synchronizing signal of the traffic demands of not common secure context time, the transmitted power of Equations of The Second Kind synchronizing signal can be relatively smaller.

Such as, for the D2DUE of first kind synchronizing signal of traffic demands receiving public safety aspect, the transmitted power of its Equations of The Second Kind synchronizing signal sent can directly be defined as: this UE, for the maximum transmit power of the communication service of public safety aspect, such as, is 31dBm.Synchronous for what have the D2D UE of public safety aspect traffic demands to set up, Equations of The Second Kind synchronizing signal still adopts UE for the maximum transmit power of the communication service of public safety aspect.

And for receive not common secure context traffic demands D2D UE send Equations of The Second Kind transmitted power, the interference that the interference caused adjacent cell to make Equations of The Second Kind synchronizing signal and this UE produce when transmitting cellular signal is in same level, the Poewr control method being similar to cellular communication can be adopted, calculate the transmitted power of Equations of The Second Kind synchronizing signal.Now, can according to the transmitted power P of following formulae discovery Equations of The Second Kind synchronizing signal _sS(i):

P _SS(i)＝min{P _CMAX,P _{SS_OFFSET}+10log ₁₀(M _SS(i))+P _{O_PUSCH}(j)+α(j)·PL+f(i)}

Wherein:

P _cMAXbe the maximum transmit power of this UE, configured by high-level signaling; Or, P _cMAXbe the maximum transmit power (also namely, maximum transmit power for the communication service of not common secure context) of this UE for the D2D UE of the traffic demands of not common secure context, configured by high-level signaling or agreement is directly determined;

P _{sS_OFFSET}it is the power offset value for synchronizing signal;

M _sSi () is Physical Resource Block (PRB) number that synchronizing signal takies;

P _{o_PUSCH}j () is the power parameter value of high-level signaling configuration;

α (j) is the path loss adjusted value of high-level signaling configuration;

PL is the path loss values of UE to cellular network;

F (i) is the power adjustment of current PUSCH;

I is subframe sequence number; Min is the operator of getting minimum value;

When the PUSCH transmission of UE is semi-continuous scheduling, j=0, when the PUSCH transmission of UE is dynamic dispatching, j=1, when the PUSCH transmission of UE is Stochastic accessing scheduling, j=2.

Method two:

The interference that the interference caused adjacent cell to make Equations of The Second Kind synchronizing signal and this UE produce when transmitting cellular signal is in same level, can adopt the Poewr control method being similar to cellular communication, calculates the transmitted power of Equations of The Second Kind synchronizing signal.

Now, according to the transmitted power P of following formulae discovery Equations of The Second Kind synchronizing signal _sS(i):

P _SS(i)＝min{P _CMAX,P _{SS_OFFSET}+10log ₁₀(M _SS(i))+P _{O_PUSCH}(j)+α(j)·PL+f(i)}

Wherein:

P _cMAXbe the maximum transmit power of this UE, configured by high-level signaling; Or, P _cMAXbe the maximum transmit power that this UE communicates for D2D, configured by high-level signaling or agreement is directly determined;

P _{sS_OFFSET}it is the power offset value for synchronizing signal;

M _sSi () is the Physical Resource Block number that synchronizing signal takies;

P _{o_PUSCH}j () is the power parameter value of high-level signaling configuration;

α (j) is the path loss adjusted value of high-level signaling configuration;

PL is the path loss values of UE to cellular network;

F (i) is the power adjustment according to current PUSCH;

I is subframe sequence number; When the PUSCH transmission of UE is semi-continuous scheduling, j=0, when the PUSCH transmission of UE is dynamic dispatching, j=1, when the PUSCH transmission of UE is Stochastic accessing scheduling, j=2.

Method three:

When D2D UE receive that OCU sends comprise the first kind synchronizing signal of the traffic demands of public safety aspect time, the transmitted power of Equations of The Second Kind synchronizing signal is relatively larger; And when receive that OCU sends comprise the first kind synchronizing signal of not common safety service demand time, the transmitted power of Equations of The Second Kind synchronizing signal is relatively smaller.

Now, for the D2D UE of first kind synchronizing signal of traffic demands receiving public safety and not common secure context, the transmitted power P of Equations of The Second Kind synchronizing signal can be obtained according to following formulae discovery _sS(i):

P _SS(i)＝min{P _CMAX(m),P _{SS_OFFSET}(m)+10log ₁₀(M _SS(i))+P _{O_PUSCH}(j)+α(j)·PL+f(i)}

Wherein:

M=0,1, when the communication service for public safety aspect, when namely receiving the first kind synchronizing signal of the traffic demands comprising public safety aspect, m=0, when the communication service for not common secure context, when namely receiving the first kind synchronizing signal of the traffic demands comprising not common secure context, m=1;

For different m values, P _cMAXm () can be identical, such as, be equal to the maximum transmit power of this UE, configured by high-level signaling;

Or, as m=0, P _cMAXm (), for this UE is for the D2D UE maximum transmit power (that is, for the maximum transmit power of the communication service of public safety aspect) of the traffic demands of public safety aspect, to be configured by high-level signaling or agreement is directly determined; As m=1, P _cMAXm (), for this UE is for the maximum transmit power (that is, for the maximum transmit power of the communication service of not common secure context) of the D2D UE of the traffic demands of not common secure context, to be configured by high-level signaling or agreement is directly determined;

As m=0, P _{sS_OFFSET}(m) be this UE for the synchronizing signal of the D2DUE of the traffic demands of public safety aspect power offset value (namely, power offset value for the synchronizing signal of the communication service of public safety aspect), to be configured by high-level signaling or agreement is directly determined; As m=1, P _{sS_OFFSET}(m) be this UE for the synchronizing signal of the D2D UE of not common secure context traffic demands power offset value (namely, power offset value for the synchronizing signal of not common secure context communication service), to be configured by high-level signaling or agreement is directly determined;

M _sSi () is Physical Resource Block (PRB) number that synchronizing signal takies;

P _{o_PUSCH}j () is the power parameter value of high-level signaling configuration;

α (j) is the path loss adjusted value of high-level signaling configuration;

PL is the path loss values of UE to cellular network;

F (i) is the power adjustment of current PUSCH;

I is subframe sequence number; When the PUSCH transmission of UE is semi-continuous scheduling, j=0, when the PUSCH transmission of UE is dynamic dispatching, j=1, when the PUSCH transmission of UE is Stochastic accessing scheduling, j=2.

The transmitted power of the Equations of The Second Kind synchronizing signal utilizing this method to calculate, the interference that the interference that Equations of The Second Kind synchronizing signal can be made to cause adjacent cell and this UE produce when transmitting cellular signal is in same level, and by the different deviation value P for the traffic demands of public safety aspect and the traffic demands of not common secure context _{sS_OFFSET}m (), adjusts the transmitted power of the Equations of The Second Kind synchronizing signal for different business demand.

Method four:

According to the path loss of the first kind synchronizing signal received, determine the transmitted power of Equations of The Second Kind synchronizing signal.Concrete, comprise the following steps:

Step 31: the path loss PL:PL=P of the first kind synchronizing signal received according to following formulae discovery UE _tX-E _rX, wherein, P _tXthe transmitted power of first kind synchronizing signal, E _rXuE when receiving first kind synchronizing signal, the received signal strength of first kind synchronizing signal;

If the transmitted power of first kind synchronizing signal is by standard definition, then D2D UE is according to the transmission power value of standard determination first kind synchronizing signal, and the received signal strength utilizing this transmission power value to deduct first kind synchronizing signal can obtain the path loss PL of first kind synchronizing signal.

Step 32: calculate synchronizing signal target received power P0_SS and PL sum, be designated as P_SS ₀;

The value of P0_SS directly can be defined by standard, and for the D2D UE having different business demand, P0_SS may be different, because for the communication service of public safety aspect, set up synchronous demand relatively more urgent, therefore P0_SS may be larger; And for the communication service of not common secure context, set up synchronous demand not too urgent, therefore P0_SS may be relatively smaller.

Step 33: according to the relation with cellular network, obtains P according to following formulae discovery _sS(i):

P _SS(i)＝min{P _CMAX(m),P _{SS_OFFSET}(m)+10log ₁₀(M _SS(i))+P _{O_PUSCH}(j)+α(j)·PL+f(i)}

Wherein, m=0,1, when the communication service for public safety aspect, when namely receiving the first kind synchronizing signal of the traffic demands comprising public safety aspect, m=0, when the communication service for not common secure context, when namely receiving the first kind synchronizing signal of the traffic demands comprising not common secure context, m=1;

For different m values, P _cMAXm () can be identical, such as, be equal to the maximum transmit power of this UE, configured by high-level signaling;

Or, as m=0, P _cMAXm (), for this UE is for the D2D UE maximum transmit power (that is, for the maximum transmit power of the communication service of public safety aspect) of the traffic demands of public safety aspect, to be configured by high-level signaling or agreement is directly determined; As m=1, P _cMAXm (), for this UE is for the maximum transmit power (that is, for the maximum transmit power of the communication service of not common secure context) of the D2D UE of the traffic demands of not common secure context, to be configured by high-level signaling or agreement is directly determined;

As m=0, P _{sS_OFFSET}(m) be this UE for the synchronizing signal of the D2DUE of the traffic demands of public safety aspect power offset value (namely, power offset value for the synchronizing signal of the communication service of public safety aspect), to be configured by high-level signaling or agreement is directly determined; As m=1, P _{sS_OFFSET}(m) be this UE for the synchronizing signal of the D2D UE of not common secure context traffic demands power offset value (namely, power offset value for the synchronizing signal of not common secure context communication service), to be configured by high-level signaling or agreement is directly determined;

M _sSi () is Physical Resource Block (PRB) number that synchronizing signal takies;

P _{o_PUSCH}j () is the power parameter value of high-level signaling configuration;

α (j) is the path loss adjusted value of high-level signaling configuration;

PL is the path loss values of UE to cellular network;

F (i) is the power adjustment of current PUSCH;

I is subframe sequence number; When the PUSCH transmission of UE is semi-continuous scheduling, j=0, when the PUSCH transmission of UE is dynamic dispatching, j=1, when the PUSCH transmission of UE is Stochastic accessing scheduling, j=2.

Step 34: determine that the transmitted power P_SS of Equations of The Second Kind synchronizing signal is: P_SS=min{P _sS(i), P_SS ₀.

This method is utilized to calculate the transmitted power of Equations of The Second Kind synchronizing signal, the interference produced when Equations of The Second Kind synchronizing signal can be made to be not more than and to transmit cellular signal to the interference that adjacent cell causes with this UE, and the transmitted power for the synchronous required synchronizing signal set up during different business demand can be met as far as possible.

Method five:

According to the path loss of the first kind synchronizing signal received, determine the transmitted power of Equations of The Second Kind synchronizing signal.Concrete, comprise the following steps:

Step 41: the path loss PL:PL=P of the first kind synchronizing signal received according to following formulae discovery UE _tX-E _rX, wherein, P _tXthe transmitted power of first kind synchronizing signal, E _rXuE when receiving first kind synchronizing signal, the received signal strength of first kind synchronizing signal;

If the transmitted power of first kind synchronizing signal is by standard definition, or transmit the transmitted power of first kind synchronizing signal in synchronizing channel, then D2D UE is according to the transmission power value of standard determination first kind synchronizing signal or the transmission power value obtaining first kind synchronizing signal from synchronizing channel, utilize this transmission power value to deduct the received signal strength of first kind synchronizing signal, the path loss PL of first kind synchronizing signal can be obtained.

Step 42: calculate synchronizing signal target received power P0_SS and PL sum, be designated as P_SS ₀;

The value of P0_SS directly can be defined by standard, and for the D2D UE having different business demand, P0_SS may be different, because for the communication service of public safety aspect, set up synchronous demand relatively more urgent, therefore P0_SS may be larger; And for the communication service of not common secure context, set up synchronous demand not too urgent, therefore P0_SS may be relatively smaller.

Step 43: according to the relation with cellular network, obtains P according to following formulae discovery _sS(i):

P _SS(i)＝min{P _CMAX,P _{SS_OFFSET}+10log ₁₀(M _SS(i))+P _{O_PUSCH}(j)+α(j)·PL+f(i)}

Wherein, P _cMAXbe the maximum transmit power of this UE, configured by high-level signaling; Or, P _cMAXbe the maximum transmit power that this UE communicates for D2D, configured by high-level signaling;

P _{sS_OFFSET}be the power offset value of this UE synchronizing signal, configured by high-level signaling or agreement is directly determined;

M _sSi () is Physical Resource Block (PRB) number that synchronizing signal takies;

P _{o_PUSCH}j () is the power parameter value of high-level signaling configuration;

α (j) is the path loss adjusted value of high-level signaling configuration;

PL is the path loss values of UE to cellular network;

F (i) is the power adjustment of current PUSCH;

I is subframe sequence number; When the PUSCH transmission of UE is semi-continuous scheduling, j=0, when the PUSCH transmission of UE is dynamic dispatching, j=1, when the PUSCH transmission of UE is Stochastic accessing scheduling, j=2.

Step 44: determine that the transmitted power P_SS of Equations of The Second Kind synchronizing signal is: P_SS=min{P _sS(i), P_SS}.

Method six:

In this method, determine that the method for the transmitted power of Equations of The Second Kind synchronizing signal comprises the following steps:

Step 51: the initial transmission power determining Equations of The Second Kind synchronizing signal.

Initial transmission power can obtain according to the path loss of the first kind synchronizing signal received.Concrete, comprise the following steps:

Step 511: the path loss PL:PL=P of the first kind synchronizing signal received according to following formulae discovery UE _tX-E _rX, wherein, P _tXthe transmitted power of first kind synchronizing signal, E _rXuE when receiving first kind synchronizing signal, the received signal strength of first kind synchronizing signal;

If the transmitted power of first kind synchronizing signal is by standard definition, then D2D UE is according to the transmission power value of standard determination first kind synchronizing signal, and the received signal strength utilizing this transmission power value to deduct first kind synchronizing signal can obtain the path loss PL of first kind synchronizing signal.

Step 512: calculate synchronizing signal target received power P0_SS and PL sum P_SS ₀;

Assumes synchronization signal target received power is P0_SS, the value of P0_SS directly can be defined by standard, and for there being the D2D UE of different business demand, P0_SS may be different, because for the communication service of public safety aspect, set up synchronous demand relatively more urgent, therefore P0_SS may be larger; And for the communication service of not common secure context, set up synchronous demand not too urgent, therefore P0_SS may be relatively smaller.

Step 513: according to the relation with cellular network, obtains P according to following formulae discovery _sS(i):

P _SS(i)＝min{P _CMAX(m),P _{SS_OFFSET}(m)+10log ₁₀(M _SS(i))+P _{O_PUSCH}(j)+α(j)·PL+f(i)}

Wherein, m=0,1, when the communication service for public safety aspect, when namely receiving the first kind synchronizing signal of the traffic demands comprising public safety aspect, m=0, when the communication service for not common secure context, when namely receiving the first kind synchronizing signal of the traffic demands comprising not common secure context, m=1;

For different m values, P _cMAXm () can be identical, such as, be equal to the maximum transmit power of this UE, configured by high-level signaling;

Or, as m=0, P _cMAXm (), for this UE is for the D2D UE maximum transmit power (that is, for the maximum transmit power of the communication service of public safety aspect) of the traffic demands of public safety aspect, to be configured by high-level signaling or agreement is directly determined; As m=1, P _cMAXm (), for this UE is for the maximum transmit power (that is, for the maximum transmit power of the communication service of not common secure context) of the D2D UE of the traffic demands of not common secure context, to be configured by high-level signaling or agreement is directly determined;

As m=0, P _{sS_OFFSET}(m) be this UE for the synchronizing signal of the D2DUE of the traffic demands of public safety aspect power offset value (namely, power offset value for the synchronizing signal of the communication service of public safety aspect), to be configured by high-level signaling or agreement is directly determined; As m=1, P _{sS_OFFSET}(m) be this UE for the synchronizing signal of the D2D UE of not common secure context traffic demands power offset value (namely, power offset value for the synchronizing signal of not common secure context communication service), to be configured by high-level signaling or agreement is directly determined;

M _sSi () is Physical Resource Block (PRB) number that synchronizing signal takies;

P _{o_PUSCH}j () is the power parameter value of high-level signaling configuration;

α (j) is the path loss adjusted value of high-level signaling configuration;

PL is the path loss values of UE to cellular network;

F (i) is the power adjustment of current PUSCH;

I is subframe sequence number; When the PUSCH transmission of UE is semi-continuous scheduling, j=0, when the PUSCH transmission of UE is dynamic dispatching, j=1, when the PUSCH transmission of UE is Stochastic accessing scheduling, j=2.

Step 514: according to the initial transmission power P_SS of following formula determination Equations of The Second Kind synchronizing signal be: P_SS=min{P _sS(i), P_SS ₀.

Step 52: from send the initial time of Equations of The Second Kind synchronizing signal according to above-mentioned initial transmission power, following operation is performed, until the transmitted power that have received the 3rd homochronousness signal that OCU sends or Equations of The Second Kind synchronizing signal reaches the maximum transmit power of UE according to prefixed time interval:

Judge whether to have received the 3rd homochronousness signal that OCU sends, if do not receive, then the transmitted power of Equations of The Second Kind synchronizing signal is increased preset increments value.

That is, D2D UE first sends Equations of The Second Kind synchronizing signal according to initial transmission power, if within a preset time interval, do not receive the 3rd homochronousness signal from OCU yet, then the transmitted power of Equations of The Second Kind synchronizing signal is increased a preset increments value, again through prefixed time interval, if do not receive the 3rd homochronousness signal from OCU yet, then again the transmitted power of Equations of The Second Kind synchronizing signal is increased a preset increments value, by that analogy, until receive the 3rd homochronousness signal from OCU, or the transmitted power of Equations of The Second Kind synchronizing signal reaches the maximum transmit power of UE.

When UE receives the 3rd homochronousness signal from OCU, the transmitted power of Equations of The Second Kind synchronizing signal remains current transmitted power.When the transmitted power of the Equations of The Second Kind synchronizing signal that UE sends reaches the maximum transmit power of UE, if do not receive the 3rd homochronousness signal from OCU yet, after then UE continues to send Equations of The Second Kind synchronizing signal a period of time with this maximum transmit power, stop sending Equations of The Second Kind synchronizing signal.Or UE improves maximum transmit power to cellular network request, and cellular network, according to the request of UE, reconfigures the maximum transmit power for D2D synchronizing signal by high-level signaling.When the transmitted power of Equations of The Second Kind synchronizing signal that UE sends reaches the maximum transmit power after raising, if do not receive the 3rd homochronousness signal from OCU yet, after then UE continues to send Equations of The Second Kind synchronizing signal a period of time with the maximum transmit power after this raising, stop sending Equations of The Second Kind synchronizing signal.

This method is utilized to calculate the transmitted power of Equations of The Second Kind synchronizing signal, the interference produced when initial Equations of The Second Kind synchronizing signal can be made to be not more than and to transmit cellular signal to the interference that adjacent cell causes with this UE, and basic guarantee meets the transmitted power setting up synchronous required synchronizing signal for different business demand.

Method seven:

In this method, determine that the method for the transmitted power of Equations of The Second Kind synchronizing signal comprises the following steps:

Step 61: the initial transmission power determining Equations of The Second Kind synchronizing signal.

Initial transmission power can obtain according to the path loss of the first kind synchronizing signal received.Concrete, comprise the following steps:

Step 611: the path loss PL:PL=P of the first kind synchronizing signal received according to following formulae discovery UE _tX-E _rX, wherein, P _tXthe transmitted power of first kind synchronizing signal, E _rXuE when receiving first kind synchronizing signal, the received signal strength of first kind synchronizing signal;

If the transmitted power of first kind synchronizing signal is by standard definition, or the transmitted power of synchronization channel transmissions synchronizing signal, then D2D UE is according to the transmission power value of standard determination first kind synchronizing signal or the transmission power value obtaining first kind synchronizing signal from synchronizing channel, and the received signal strength utilizing this transmission power value to deduct first kind synchronizing signal can obtain the path loss PL of first kind synchronizing signal.

Step 612: calculate synchronizing signal target received power P0_SS and PL sum P_SS ₀;

Assumes synchronization signal target received power is P0_SS, the value of P0_SS directly can be defined by standard, and for there being the D2D UE of different business demand, P0_SS may be different, because for the communication service of public safety aspect, set up synchronous demand relatively more urgent, therefore P0_SS may be larger; And for the communication service of not common secure context, set up synchronous demand not too urgent, therefore P0_SS may be relatively smaller.

Step 613: according to the relation with cellular network, obtains P according to following formulae discovery _sS(i):

P _SS(i)＝min{P _CMAX,P _{SS_OFFSET}+10log ₁₀(M _SS(i))+P _{O_PUSCH}(j)+α(j)·PL+f(i)}

Wherein, P _cMAXbe the maximum transmit power of this UE, configured by high-level signaling; Or, P _cMAXbe the maximum transmit power that this UE communicates for D2D, configured by high-level signaling;

P _{sS_OFFSET}be the power offset value of this UE synchronizing signal, configured by high-level signaling or agreement is directly determined;

M _sSi () is Physical Resource Block (PRB) number that synchronizing signal takies;

P _{o_PUSCH}j () is the power parameter value of high-level signaling configuration;

α (j) is the path loss adjusted value of high-level signaling configuration;

PL is the path loss values of UE to cellular network;

F (i) is the power adjustment of current PUSCH;

I is subframe sequence number; When the PUSCH transmission of UE is semi-continuous scheduling, j=0, when the PUSCH transmission of UE is dynamic dispatching, j=1, when the PUSCH transmission of UE is Stochastic accessing scheduling, j=2.

Step 614: determine that the initial transmission power P_SS of Equations of The Second Kind synchronizing signal is: P_SS=min{P _sS(i), P_SS ₀;

Step 62: from send the initial time of Equations of The Second Kind synchronizing signal according to above-mentioned initial transmission power, following operation is performed, until the transmitted power that have received the 3rd homochronousness signal that OCU sends or Equations of The Second Kind synchronizing signal reaches the maximum transmit power of UE according to prefixed time interval:

Judge whether to have received the synchronizing signal that OCU sends, if do not receive, then the transmitted power of Equations of The Second Kind synchronizing signal is increased preset increments value.

That is, D2D UE first sends Equations of The Second Kind synchronizing signal according to initial transmission power, if within a preset time interval, do not receive the 3rd homochronousness signal from OCU yet, the transmitted power of Equations of The Second Kind synchronizing signal is increased a preset increments value, again through prefixed time interval, if do not receive the 3rd homochronousness signal from OCU yet, then again the transmitted power of Equations of The Second Kind synchronizing signal is increased a preset increments value, by that analogy, until receive the 3rd homochronousness signal from OCU, or the transmitted power of Equations of The Second Kind synchronizing signal reaches the maximum transmit power of UE.

When UE receives the 3rd homochronousness signal from OCU, the transmitted power of Equations of The Second Kind synchronizing signal remains current transmitted power.When the transmitted power of the Equations of The Second Kind synchronizing signal that UE sends reaches the maximum transmit power of UE, if do not receive the 3rd homochronousness signal from OCU yet, after then UE continues to send Equations of The Second Kind synchronizing signal a period of time with this maximum transmit power, stop sending Equations of The Second Kind synchronizing signal.Or UE improves maximum transmit power to cellular network request, and cellular network, according to the request of UE, reconfigures the maximum transmit power for D2D synchronizing signal by high-level signaling.When the transmitted power of Equations of The Second Kind synchronizing signal that UE sends reaches the maximum transmit power after raising, if do not receive the 3rd homochronousness signal from OCU yet, after then UE continues to send Equations of The Second Kind synchronizing signal a period of time with the maximum transmit power after this raising, stop sending Equations of The Second Kind synchronizing signal.

Embodiment four

When the synchronizing signal that will send is the 3rd homochronousness signal, in step s 102, determine that the concrete grammar of the transmitted power of the 3rd homochronousness signal that will send can adopt in following methods any one.

Method one:

For the D2D UE having different business demand, the transmitted power of its 3rd homochronousness signal sent may be different, because for the communication service of public safety aspect, set up synchronous demand relatively more urgent, therefore the transmitted power of the 3rd homochronousness signal is relatively larger; And for the communication service of not common secure context, set up synchronous demand not too urgent, therefore the transmitted power of the 3rd homochronousness signal can be relatively smaller.

Such as, the 3rd homochronousness signal that the D2D UE for the traffic demands of public safety aspect sends, directly the transmitted power of definition the 3rd homochronousness signal is: this UE, for the maximum transmit power of the communication service of public safety aspect, such as, is 31dBm.

And for the 3rd homochronousness signal that the D2D UE of the traffic demands of not common secure context sends, a kind ofly determine that the method for transmitted power is: this transmitted power is the maximum transmit power of this UE for the communication service of not common secure context.Such as, be 23dBm.Another kind of defining method is, the transmitted power of direct definition now the 3rd homochronousness signal is fixed value, such as, this fixed value be according to D2D UE between the transmitted power that calculates of expectation communication distance, as supposed, the expectation communication distance between D2D UE is 70 meters, can calculate suitable transmitted power according to this distance.

Method two

The transmitted power of direct definition the 3rd homochronousness signal is the maximum transmit power of this UE, such as, is 23dBm, or 31dBm.

Method three

The transmitted power of direct definition the 3rd homochronousness signal is fixed value, such as, this fixed value be according to D2D UE between the transmitted power that calculates of expectation communication distance, if the expectation communication distance between hypothesis D2D UE is 70 meters, suitable transmitted power can be calculated according to this distance.

Method four

D2D UE, according to the path loss of the Equations of The Second Kind synchronizing signal received, determines the transmitted power of the 3rd homochronousness signal.Concrete, comprise the following steps:

Step 71: the path loss PL:PL=P of the Equations of The Second Kind synchronizing signal received according to following formulae discovery UE _tX-E _rX, wherein, P _tXthe transmitted power of Equations of The Second Kind synchronizing signal, E _rXuE when receiving Equations of The Second Kind synchronizing signal, the received signal strength of Equations of The Second Kind synchronizing signal;

If the transmitted power of Equations of The Second Kind synchronizing signal is by standard definition, then D2D UE is according to the transmission power value of standard determination Equations of The Second Kind synchronizing signal, utilize this transmission power value to deduct the received signal strength of Equations of The Second Kind synchronizing signal, the path loss PL of Equations of The Second Kind synchronizing signal can be obtained.

Step 72: determine that the transmitted power P_SS of the 3rd homochronousness signal that will send is synchronizing signal target received power P0_SS and PL sum.

Assumes synchronization signal target received power is P0_SS, the value of P0_SS directly can be defined by standard, and for the D2D UE having different business demand, P0_SS may be different, because for the communication service of public safety aspect, set up synchronous demand relatively more urgent, therefore P0_SS may be larger; And for the communication service of not common secure context, set up synchronous demand not too urgent, therefore P0_SS may be relatively smaller.Also may be identical for there being the P0_SS of the D2D UE of different business demand.

In this method, according to the path loss of the Equations of The Second Kind synchronizing signal measured, calculate the transmitted power of the 3rd homochronousness signal that will send, the transmitted power determined more when not wasting power, well be met and setting up synchronous demand.

Embodiment five

When the synchronizing signal that will send is the 4th homochronousness signal, in step s 102, determine that the concrete grammar of the transmitted power of the 4th homochronousness signal that will send can adopt in following methods any one.

Method one:

Adopt the method determining the transmitted power of first kind synchronizing signal in embodiment one, determine the transmitted power of the 4th homochronousness signal.

Method two:

Adopt the method determining the transmitted power of the 3rd homochronousness signal in embodiment four, determine the transmitted power of the 4th homochronousness signal.

In addition, in the Poewr control method of the embodiment of the present application, also contemplate the power control to the discovery signal sent between UE, and the power control to communication channel or signal.Concrete, as shown in Figure 5, further comprising the steps of in the method:

Step S202, UE, according to the predetermined power control method of correspondence, determine the transmitted power of the channel signal that will send; Wherein, the channel signal that send finds signal (discovery signal), or, be communication channel or signal;

Step S204, UE, according to the transmitted power determined, send this channel signal that will send to other UE.

Below by embodiment six and embodiment seven, to describe in detail in step S202 for the different channels signal that will send, determine the concrete grammar of transmitted power.

Embodiment six

When the channel signal that will send is when finding signal, in step S202, determine to find the concrete grammar of transmitted power of signal can adopt in following methods any one.

When D2D UE is ICU, if UE and cellular network remain connection status, then the D2D that UE sends finds that signal is relevant to the power of UE cellular uplink channel.

Method one:

Directly definition finds the transmitted power of signal, such as, is the maximum transmit power of UE.

Or, the transmitted power finding signal is configured by high-level signaling.

Method two:

The interference that the interference caused adjacent cell to make discovery signal and this UE produce when transmitting cellular signal is in same level, and the Poewr control method being similar to cellular communication can be adopted to calculate transmitted power.Concrete, can obtain according to following formulae discovery the transmitted power P finding signal _dis(i):

P _Dis(i)＝min{P _CMAX,P _{Dis_OFFSET}+10log ₁₀(M _Dis(i))+P _{O_PUSCH}(j)+α(j)·PL+f(i)}

Wherein:

P _cMAXbe the maximum transmit power of this UE, configured by high-level signaling; Or, P _cMAXit is the maximum transmit power that this UE communicates for D2D;

P _{dis_OFFSET}it is the power offset value for finding signal;

M _disi () is Physical Resource Block (PRB) number finding that signal takies;

P _{o_PUSCH}j () is the power parameter value of high-level signaling configuration;

A (j) is the path loss adjusted value of high-level signaling configuration;

PL is the path loss values of UE to cellular network;

F (i) is the power adjustment of current PUSCH;

I is subframe sequence number; When the PUSCH transmission of UE is semi-continuous scheduling, j=0, when the PUSCH transmission of UE is dynamic dispatching, j=1, when the PUSCH transmission of UE is Stochastic accessing scheduling, j=2.

Method three:

According to the relation with cellular network, obtain according to following formulae discovery the transmitted power P finding signal _dis(i):

P _Dis(i)＝min{P _{Dis_MAX},P _{Dis_OFFSET}+10log ₁₀(M _Dis(i))+P _{O_PUSCH}(j)+α(j)·PL+f(i)}

Wherein:

P _{dis_MAX}it is the maximum transmit power of the discovery signal configured by high-level signaling;

P _{dis_OFFSET}it is the power offset value for finding signal;

M _disi () is Physical Resource Block (PRB) number finding that signal takies;

P _{o_PUSCH}j () is the power parameter value of high-level signaling configuration;

A (j) is the path loss adjusted value of high-level signaling configuration;

PL is the path loss values of UE to cellular network;

F (i) is the power adjustment of current PUSCH;

I is subframe sequence number; When the PUSCH transmission of UE is semi-continuous scheduling, j=0, when the PUSCH transmission of UE is dynamic dispatching, j=1, when the PUSCH transmission of UE is Stochastic accessing scheduling, j=2.

This method is utilized to calculate the transmitted power finding signal, the interference produced when discovery signal can be made to be not more than and to transmit cellular signal to the interference that adjacent cell causes with this UE.

Embodiment seven

When the channel signal that will send be communication channel or signal time, in step S202, determine that the concrete grammar of the transmitted power of communication channel or signal can adopt in following methods any one.

When D2D UE is ICU, if this UE and cellular network remain connection status, then the communication channel that sends of UE or the transmitted power of signal relevant to the power of UE cellular uplink channel.

Method one:

The transmitted power of direct definition communication channel or signal, such as, by the transmitted power of high-level signaling configuration communication channel or signal.

Method two:

The interference that the interference caused adjacent cell to make communication channel or signal and this UE produce when transmitting cellular signal is in same level, can adopt the Poewr control method being similar to cellular communication, calculate the transmitted power of communication channel or signal.Concrete, can according to the transmitted power P of following formulae discovery communication channel or signal _d2D(i):

P _D2D(i)＝min{P _CMAX,P _{D2D_OFFSET}+10log ₁₀(M _D2D(i))+P _{O_PUSCH}(j)+α(j)·PL+f(i)}

Wherein:

P _cMAXbe the maximum transmit power of this UE, configured by high-level signaling; Or, P _cMAXit is the maximum transmit power that UE communicates for D2D;

P _{d2D_OFFSET}it is the power offset value for communication channel or signal;

M _d2Di () is Physical Resource Block (PRB) number that communication channel or signal take;

P _{o_PUSCH}j () is the power parameter value of high-level signaling configuration;

A (j) is the path loss adjusted value of high-level signaling configuration;

PL is the path loss values of UE to cellular network;

F (i) is the power adjustment of current PUSCH;

I is subframe sequence number; When the PUSCH transmission of UE is semi-continuous scheduling, j=0, when the PUSCH transmission of UE is dynamic dispatching, j=1, when the PUSCH transmission of UE is Stochastic accessing scheduling, j=2.

Method three:

According to the relation with cellular network, can according to the transmitted power P of following formulae discovery communication channel or signal _d2D(i):

P _D2D(i)＝min{P _{D2D_MAX},P _{D2D_OFFSET}+10log ₁₀(M _D2D(i))+P _{O_PUSCH}(j)+α(j)·PL+f(i)}

Wherein:

P _{d2D_MAX}it is the maximum transmit power of communication channel or the signal configured by high-level signaling;

P _{d2D_OFFSET}it is the power offset value for communication channel or signal;

M _d2Di () is Physical Resource Block (PRB) number that communication channel or signal take;

P _{o_PUSCH}j () is the power parameter value of high-level signaling configuration;

A (j) is the path loss adjusted value of high-level signaling configuration;

PL is the path loss values of UE to cellular network;

F (i) is the power adjustment of current PUSCH;

I is subframe sequence number; When the PUSCH transmission of UE is semi-continuous scheduling, j=0, when the PUSCH transmission of UE is dynamic dispatching, j=1, when the PUSCH transmission of UE is Stochastic accessing scheduling, j=2.

This method is utilized to calculate the transmitted power of communication channel or signal, the interference produced when communication channel or signal can be made to be not more than and to transmit cellular signal to the interference that adjacent cell causes with this UE.

Wherein, above-mentioned communication channel can be physical channel, and above-mentioned signal of communication can be reference signal.

Embodiment eight

For the method in above-described embodiment, provide in the embodiment of the present application a kind of can UE to apply the method, this UE can be D2D UE.When this UE does not have the network coverage, can referred to as OCU, when there is the network coverage in this UE, can referred to as ICU.

As shown in Figure 6, this UE comprises with lower module: determination module 10 and sending module 20, wherein:

Determination module 10, for when UE will send synchronizing signal, according to the predetermined power control method of correspondence, determines the transmitted power of the synchronizing signal that will send;

Sending module 20, for the transmitted power determined according to determination module 10, sends this synchronizing signal that will send to other UE;

Wherein, this synchronizing signal that will send be OCU when not receiving the synchronizing signal that arbitrary UE sends, to ICU send first kind synchronizing signal;

Or this synchronizing signal that will send is ICU after receiving the first kind synchronizing signal that OCU sends, the Equations of The Second Kind synchronizing signal of transmission;

Or this synchronizing signal that will send is OCU after receiving the Equations of The Second Kind synchronizing signal that ICU sends, the 3rd homochronousness signal of transmission;

Or this synchronizing signal that will send is OCU after receiving the first kind synchronizing signal or the 3rd homochronousness signal that other OCU send, the 4th homochronousness signal of transmission.

In addition, determination module comprises: the first determining unit or the second determining unit, wherein:

First determining unit, during for being first kind synchronizing signal, Equations of The Second Kind synchronizing signal, the 3rd homochronousness signal or the 4th homochronousness signal when the synchronizing signal that will send, according to for the type of service of communication service, determine the transmitted power of the synchronizing signal that will send, wherein, type of service comprises: the communication service of public safety aspect and the communication service of not common secure context; Wherein, during communication service for public safety aspect, the transmitted power of the synchronizing signal that send is the first transmitted power, during communication service for not common secure context, the transmitted power of the synchronizing signal sent is the second transmitted power, and the first transmitted power is greater than the second transmitted power.

Second determining unit, during for being first kind synchronizing signal, Equations of The Second Kind synchronizing signal, the 3rd homochronousness signal or the 4th homochronousness signal when the synchronizing signal that will send, determines that the transmitted power of the synchronizing signal that will send is for presetting transmission power value.Wherein, this default transmission power value is one of following: the maximum transmit power of UE, or, according to the transmitted power that the expectation communication distance between UE calculates.

Wherein, in a kind of situation, the first transmitted power is the maximum transmit power of UE for the communication service of public safety aspect; Second transmitted power is the maximum transmit power of UE for the communication service of not common secure context, or according to the transmitted power that the expectation communication distance between UE calculates.

In another kind of situation, when the synchronizing signal that will send is Equations of The Second Kind synchronizing signal, and when UE and cellular network are in connection status, determine the second transmitted power P according to following formula _sS(i):

P _SS(i)＝min{P _CMAX,P _{SS_OFFSET}+10log ₁₀(M _SS(i))+P _{O_PUSCH}(j)+α(j)·PL+f(i)}；

Wherein, i is subframe sequence number; P _cMAXbe the maximum transmit power of UE, or UE is for the maximum transmit power of the communication service of not common secure context; P _{sS_OFFSET}it is the power offset value for synchronizing signal; MSS (i) is the Physical Resource Block number that synchronizing signal takies; P _{o_PUSCH}j () is power parameter value; α (j) is path loss adjusted value; PL is the path loss values of UE to cellular network; F (i) is the power adjustment of present physical Uplink Shared Channel PUSCH; When the PUSCH transmission of UE is semi-continuous scheduling, j=0, when the PUSCH transmission of UE is dynamic dispatching, j=1, when the PUSCH transmission of UE is Stochastic accessing scheduling, j=2.

Or determination module comprises: the 3rd determining unit, be Equations of The Second Kind synchronizing signal for working as the synchronizing signal that will send, and when UE and cellular network are in connection status, determine the transmitted power P of the Equations of The Second Kind synchronizing signal that will send according to following formula _sS(i):

P _SS(i)＝min{P _CMAX,P _{SS_OFFSET}+10log ₁₀(M _SS(i))+P _{O_PUSCH}(j)+α(j)·PL+f(i)}；

Wherein, i is subframe sequence number; P _cMAXthe maximum transmit power of UE, or the maximum transmit power that UE communicates for device-to-device D2D; P _{sS_OFFSET}it is the power offset value for synchronizing signal; MSS (i) is the Physical Resource Block number that synchronizing signal takies; P _{o_PUSCH}j () is power parameter value; α (j) is path loss adjusted value; PL is the path loss values of UE to cellular network; F (i) is the power adjustment of current PUSCH; When the PUSCH transmission of UE is semi-continuous scheduling, j=0, when the PUSCH transmission of UE is dynamic dispatching, j=1, when the PUSCH transmission of UE is Stochastic accessing scheduling, j=2.

Or determination module comprises: the 4th determining unit, be Equations of The Second Kind synchronizing signal for working as the synchronizing signal that will send, and when UE and cellular network are in connection status, determine the transmitted power P of the Equations of The Second Kind synchronizing signal that will send according to following formula _sS(i):

P _SS(i)＝min{P _CMAX(m),P _{SS_OFFSET}(m)+10log ₁₀(M _SS(i))+P _{O_PUSCH}(j)+α(j)·ＰL+f(i)}；

Wherein, m=0,1, when communication service for public safety aspect, m=0, when communication service for not common secure context, m=1;

P _cMAX(0) be the maximum transmit power of UE, or UE is for the maximum transmit power of the communication service of public safety aspect; P _cMAX(1) be the maximum transmit power of UE, or UE is for the maximum transmit power of the communication service of not common secure context;

P _{sS_OFFSET}(0) be the power offset value of synchronizing signal of communication service for public safety aspect, P _{sS_OFFSET}(1) be the power offset value of synchronizing signal of communication service for not common secure context;

I is subframe sequence number; M _sSi () is the Physical Resource Block number that synchronizing signal takies; P _{o_PUSCH}j () is power parameter value; α (j) is path loss adjusted value; PL is the path loss values of UE to cellular network; F (i) is the power adjustment of current PUSCH; When the PUSCH transmission of UE is semi-continuous scheduling, j=0, when the PUSCH transmission of UE is dynamic dispatching, j=1, when the PUSCH transmission of UE is Stochastic accessing scheduling, j=2.

Or determination module comprises: path loss calculation unit and the 5th determining unit, wherein:

Path loss calculation unit, during for being Equations of The Second Kind synchronizing signal, the 3rd homochronousness signal or the 4th homochronousness signal when the synchronizing signal that will send, the path loss PL:PL=P of the synchronizing signal received according to following formulae discovery UE _tX-E _rX, wherein, P _tXthe transmitted power of the synchronizing signal received, E _rXbe UE receive synchronizing signal time, the received signal strength of the synchronizing signal received;

5th determining unit, for the path loss PL calculated according to path loss calculation unit, determines the transmitted power of the synchronizing signal that will send;

Wherein, when the synchronizing signal that will send is Equations of The Second Kind synchronizing signal, the synchronizing signal received is first kind synchronizing signal, when the synchronizing signal that will send is the 3rd homochronousness signal, the synchronizing signal received is Equations of The Second Kind synchronizing signal, when the synchronizing signal that will send is the 4th homochronousness signal, the synchronizing signal received is first kind synchronizing signal or the 3rd homochronousness signal.

Wherein, the 5th determining unit specifically for: determine that the transmitted power of the synchronizing signal that will send is synchronizing signal target received power P0_SS and PL sum.

Or, the 5th determining unit specifically for: when the synchronizing signal that will send is Equations of The Second Kind synchronizing signal, and when UE and cellular network are in connection status, calculate synchronizing signal target received power P0_SS and PL sum P_SS ₀; The transmitted power P_SS of the Equations of The Second Kind synchronizing signal that will send is determined according to following formula:

$\left\{\begin{array}{c}P\_\mathrm{SS}=\min \{P_{\mathrm{SS}}\left(i\right),P\_{\mathrm{SS}}_0\}\\ P_{\mathrm{SS}}\left(i\right)=\min \{P_{\mathrm{CMAX}},P_{\mathrm{SS}\_\mathrm{OFFSET}}+10{\log }_{10}\left(M_{\mathrm{SS}}\left(i\right)\right)+P_{O\_\mathrm{PUSCH}}\left(j\right)+\mathrm{\α}\left(j\right)\·\mathrm{PL}+f\left(i\right)\}\end{array};\right.$

Wherein, i is subframe sequence number; P _cMAXthe maximum transmit power of UE, or the maximum transmit power that UE communicates for D2D; P _{sS_OFFSET}it is the power offset value for synchronizing signal; M _sSi () is the Physical Resource Block number that synchronizing signal takies; P _{o_PUSCH}j () is power parameter value; α (j) is path loss adjusted value; PL is the path loss values of UE to cellular network; F (i) is the power adjustment of current PUSCH; When the PUSCH transmission of UE is semi-continuous scheduling, j=0, when the PUSCH transmission of UE is dynamic dispatching, j=1, when the PUSCH transmission of UE is Stochastic accessing scheduling, j=2.

Or, the 5th determining unit specifically for: when the synchronizing signal that will send is Equations of The Second Kind synchronizing signal, and when UE and cellular network are in connection status, calculate synchronizing signal target received power P0_SS and PL sum P_SS ₀; The transmitted power P_SS of the Equations of The Second Kind synchronizing signal that will send is determined according to following formula:

$\left\{\begin{array}{c}P\_\mathrm{SS}=\min \{P_{\mathrm{SS}}\left(i\right),P\_{\mathrm{SS}}_0\}\\ P_{\mathrm{SS}}\left(i\right)=\min \{P_{\mathrm{CMAX}}\left(m\right),P_{\mathrm{SS}\_\mathrm{OFFSET}}+\left(m\right)10{\log }_{10}\left(M_{\mathrm{SS}}\left(i\right)\right)+P_{O\_\mathrm{PUSCH}}\left(j\right)+\mathrm{\α}\left(j\right)\·\mathrm{PL}+f\left(i\right)\}\end{array};\right.$

Wherein, m=0,1, when communication service for public safety aspect, m=0, when communication service for not common secure context, m=1;

P _cMAX(0) be the maximum transmit power of UE, or UE is for the maximum transmit power of the communication service of public safety aspect; P _cMAX(1) be the maximum transmit power of UE, or UE is for the maximum transmit power of the communication service of not common secure context;

P _{sS_OFFSET}(0) be the power offset value of synchronizing signal of communication service for public safety aspect, P _{sS_OFFSET}(1) be the power offset value of synchronizing signal of communication service for not common secure context;

I is subframe sequence number; M _sSi () is the Physical Resource Block number that synchronizing signal takies; P _{o_PUSCH}j () is power parameter value; α (j) is path loss adjusted value; PL is the path loss values of UE to cellular network; F (i) is the power adjustment of current PUSCH; When the PUSCH transmission of UE is semi-continuous scheduling, j=0, when the PUSCH transmission of UE is dynamic dispatching, j=1, when the PUSCH transmission of UE is Stochastic accessing scheduling, j=2.

Or determination module comprises: initial transmission power determining unit and processing unit, wherein:

Initial transmission power determining unit, during for being first kind synchronizing signal, Equations of The Second Kind synchronizing signal or the 4th homochronousness signal when the synchronizing signal that will send, determines the initial transmission power of the synchronizing signal that will send;

Processing unit, for from send the initial time of the synchronizing signal that will send according to initial transmission power, following operation is performed according to prefixed time interval, until have received synchronizing signal that other UE send, maximum transmit power that the transmitted power of synchronizing signal that maybe will send reaches UE: judge whether to have received the synchronizing signal that other UE send, if do not receive, then the transmitted power of the synchronizing signal that will send increases preset increments value;

Wherein, when the synchronizing signal that will send is first kind synchronizing signal, the synchronizing signal that other UE send is Equations of The Second Kind synchronizing signal; When the synchronizing signal that will send is Equations of The Second Kind synchronizing signal, the synchronizing signal that other UE send is the 3rd homochronousness signal; When the synchronizing signal that will send is the 4th homochronousness signal, the synchronizing signal that other UE send is Equations of The Second Kind synchronizing signal.

Wherein, initial transmission power determining unit specifically for: the initial transmission power determining the synchronizing signal that will send is for presetting transmission power value.

Or initial transmission power determining unit comprises: path loss calculation unit and

Path loss calculation unit, during for being Equations of The Second Kind synchronizing signal when the synchronizing signal that will send, the path loss PL:PL=P of the first kind synchronizing signal received according to following formulae discovery UE _tX-E _rX, wherein, P _tXthe transmitted power of first kind synchronizing signal, E _rXuE when receiving first kind synchronizing signal, the received signal strength of first kind synchronizing signal;

Power determining unit, for the path loss PL of first kind synchronizing signal calculated according to path loss calculation unit, determines the initial transmission power of the Equations of The Second Kind synchronizing signal that will send.

Wherein, power determining unit specifically for: determine that the initial transmission power of the Equations of The Second Kind synchronizing signal that will send is synchronizing signal target received power P0_SS and PL sum.

Or, power determining unit specifically for: when UE and cellular network are in connection status, calculate synchronizing signal target received power P0_SS and PL sum P_SS ₀; The initial transmission power P_SS of the Equations of The Second Kind synchronizing signal that will send is determined according to following formula:

$\left\{\begin{array}{c}P\_\mathrm{SS}=\min \{P_{\mathrm{SS}}\left(i\right),P\_{\mathrm{SS}}_0\}\\ P_{\mathrm{SS}}\left(i\right)=\min \{P_{\mathrm{CMAX}},P_{\mathrm{SS}\_\mathrm{OFFSET}}+10{\log }_{10}\left(M_{\mathrm{SS}}\left(i\right)\right)+P_{O\_\mathrm{PUSCH}}\left(j\right)+\mathrm{\α}\left(j\right)\·\mathrm{PL}+f\left(i\right)\}\end{array};\right.$

Wherein, i is subframe sequence number; P _cMAXthe maximum transmit power of UE, or the maximum transmit power that UE communicates for D2D; P _{sS_OFFSET}it is the power offset value for synchronizing signal; M _sSi () is the Physical Resource Block number that synchronizing signal takies; P _{o_PUSCH}j () is power parameter value; α (j) is path loss adjusted value; PL is the path loss values of UE to cellular network; F (i) is the power adjustment of current PUSCH; When the PUSCH transmission of UE is semi-continuous scheduling, j=0, when the PUSCH transmission of UE is dynamic dispatching, j=1, when the PUSCH transmission of UE is Stochastic accessing scheduling, j=2.

Or, power determining unit specifically for: when UE and cellular network are in connection status, calculate synchronizing signal target received power P0_SS and PL sum P_SS ₀; The initial transmission power P_SS of the Equations of The Second Kind synchronizing signal that will send is determined according to following formula:

$\left\{\begin{array}{c}P\_\mathrm{SS}=\min \{P_{\mathrm{SS}}\left(i\right),P\_{\mathrm{SS}}_0\}\\ P_{\mathrm{SS}}\left(i\right)=\min \{P_{\mathrm{CMAX}}\left(m\right),P_{\mathrm{SS}\_\mathrm{OFFSET}}+\left(m\right)10{\log }_{10}\left(M_{\mathrm{SS}}\left(i\right)\right)+P_{O\_\mathrm{PUSCH}}\left(j\right)+\mathrm{\α}\left(j\right)\·\mathrm{PL}+f\left(i\right)\}\end{array};\right.$

Wherein, m=0,1, when communication service for public safety aspect, m=0, when communication service for not common secure context, m=1;

P _cMAX(0) be the maximum transmit power of UE, or UE is for the maximum transmit power of the communication service of public safety aspect; P _cMAX(1) be the maximum transmit power of UE, or UE is for the maximum transmit power of the communication service of not common secure context;

P _{sS_OFFSET}(0) be the power offset value of synchronizing signal of communication service for public safety aspect, P _{sS_OFFSET}(1) be the power offset value of synchronizing signal of communication service for not common secure context;

I is subframe sequence number; M _sSi () is the Physical Resource Block number that synchronizing signal takies; P _{o_PUSCH}j () is power parameter value; α (j) is path loss adjusted value; PL is the path loss values of UE to cellular network; F (i) is the power adjustment of current PUSCH; When the PUSCH transmission of UE is semi-continuous scheduling, j=0, when the PUSCH transmission of UE is dynamic dispatching, j=1, when the PUSCH transmission of UE is Stochastic accessing scheduling, j=2.

In addition, determination module 10, time also for wanting transmitting channel signal as UE, according to the predetermined power control method of correspondence, determines the transmitted power of the channel signal that will send; Wherein, the channel signal that send finds signal, or, be communication channel or signal;

Sending module 20, the transmitted power also for determining according to determination module 10, sends the channel signal that this will send.

Wherein, determination module 10 specifically for: when the channel signal that will send finds signal, or, be communication channel or signal time, the transmitted power determining the channel signal that will send is for presetting transmission power value.

Or, determination module 10 specifically for: when the channel signal that will send finds signal, and when UE and cellular network are in connection status, determine the transmitted power P of the discovery signal that will send according to following formula _dis(i):

P _dis(i)=min{P _cMAX, P _{dis_OFFSET}+ 10log ₁₀(M _dis(i))+P _{o_PUSCH}(j)+α (j) PL+f (i) }; Or, P _dis(i)=min{P _{dis_MAX}, P _{dis_OFFSET}+ 10log ₁₀(M _dis(i))+P _{o_PUSCH}(j)+α (j) PL+f (i) };

Wherein, i is subframe sequence number; P _cMAXthe maximum transmit power that UE allows, or the maximum transmit power that UE communicates for D2D; P _{dis_MAX}it is the maximum transmit power finding signal; P _{dis_OFFSET}it is the power offset value for finding signal; M _disi () is the Physical Resource Block number finding that signal takies; P _{o_PUSCH}j () is power parameter value; α (j) is path loss adjusted value; PL is the path loss values of UE to cellular network; F (i) is the power adjustment of current PUSCH; When the PUSCH transmission of UE is semi-continuous scheduling, j=0, when the PUSCH transmission of UE is dynamic dispatching, j=1, when the PUSCH transmission of UE is Stochastic accessing scheduling, j=2.

Wherein, determination module 10 specifically for: when the channel signal that will send is communication channel or signal, and when UE and cellular network are in connection status, determine the transmitted power P of communication channel or the signal that will send according to following formula _d2D(i):

P _d2D(i)=min{P _cMAX, P _{d2D_OFFSET}+ 10log ₁₀(M _d2D(i))+P _{o_PUSCH}(j)+α (j) PL+f (i) }; Or, P _d2D(i)=min{P _{d2D_MAX}, P _{d2D_OFFSET}+ 10log ₁₀(M _d2D(i))+P _{o_PUSCH}(j)+α (j) PL+f (i) };

Wherein, P _cMAXthe maximum transmit power that UE allows, or the maximum transmit power that UE communicates for D2D; P _{d2D_OFFSET}it is the power offset value for communication channel or signal; I is subframe sequence number; M _d2Di () is the Physical Resource Block number that communication channel or signal take; P _{o_PUSCH}j () is power parameter value; α (j) is path loss adjusted value; PL is the path loss values of UE to cellular network; F (i) is the power adjustment of current PUSCH; P _{d2D_MAX}it is the maximum transmit power of communication channel or signal; When the PUSCH transmission of UE is semi-continuous scheduling, j=0, when the PUSCH transmission of UE is dynamic dispatching, j=1, when the PUSCH transmission of UE is Stochastic accessing scheduling, j=2.

To sum up, the above embodiment of the application can reach following technique effect:

(1) in the environment coexisted at D2D UE and honeycomb UE, carry out suitable power by all kinds of synchronizing signals sent D2D UE to control, the synchronizing signal that D2D UE can be made to send can not cause serious interference to the upward signal of this community and adjacent cell and up channel, and D2D UE and honeycomb UE all can normally work; Meanwhile, can help again not have the D2D UE of the network coverage to set up synchronous, and a large amount of consume battery power that D2D UE can not be made because sending synchronizing signal.

(2) object owing to being in the D2D UE transmission synchronizing signal under dissimilar environment is different with effect, therefore, determines that different transmitted powers sends synchronizing signal in the embodiment of the present application according to different situations.

(3) suitable power control has also been carried out to discovery signal, communication channel or signal.

The foregoing is only the preferred embodiment of the application, not in order to limit the application, within all spirit in the application and principle, any amendment made, equivalent replacements, improvement etc., all should be included within scope that the application protects.

Claims (23)

1. the Poewr control method in Long Term Evolution LTE system, described method is applied to user equipment (UE), it is characterized in that, described method comprises:

UE, according to the predetermined power control method of correspondence, determines the transmitted power of the synchronizing signal that will send;

UE according to the transmitted power determined, the synchronizing signal that will send described in sending to other UE;

Wherein, the described synchronizing signal that will send does not have the subscriber equipment OCU of the network coverage when not receiving the synchronizing signal that arbitrary UE sends, to the first kind synchronizing signal that the subscriber equipment ICU that there is the network coverage sends;

Or the described synchronizing signal that will send is ICU after receiving the first kind synchronizing signal that OCU sends, the Equations of The Second Kind synchronizing signal of transmission;

Or the described synchronizing signal that will send is OCU after receiving the Equations of The Second Kind synchronizing signal that ICU sends, the 3rd homochronousness signal of transmission;

Or the described synchronizing signal that will send is OCU after receiving the first kind synchronizing signal or the 3rd homochronousness signal that other OCU send, the 4th homochronousness signal of transmission.

2. method according to claim 1, is characterized in that, the described synchronizing signal that will send is first kind synchronizing signal, Equations of The Second Kind synchronizing signal, the 3rd homochronousness signal or the 4th homochronousness signal; Then, determine that the method for the transmitted power of the synchronizing signal that will send comprises:

According to for the type of service of communication service, determine the transmitted power of the described synchronizing signal that will send, wherein, described type of service comprises: the communication service of public safety aspect and the communication service of not common secure context;

Or, determine that the transmitted power of the described synchronizing signal that will send is for presetting transmission power value.

3. method according to claim 2, is characterized in that, described default transmission power value is one of following: the maximum transmit power of UE, or, according to the transmitted power that the expectation communication distance between UE calculates.

4. method according to claim 2, it is characterized in that, during communication service for described public safety aspect, the transmitted power of the described synchronizing signal that will send is the first transmitted power, during communication service for described not common secure context, the transmitted power of the described synchronizing signal that will send is the second transmitted power, and described first transmitted power is greater than described second transmitted power.

5. method according to claim 4, is characterized in that, described first transmitted power is the maximum transmit power of UE for the communication service of public safety aspect;

Described second transmitted power is the maximum transmit power of UE for the communication service of not common secure context, or according to the transmitted power that the expectation communication distance between UE calculates.

6. method according to claim 4, is characterized in that, when the described synchronizing signal that will send is Equations of The Second Kind synchronizing signal, and when UE and cellular network are in connection status, determines described second transmitted power P according to following formula _sS(i):

P _SS(i)＝min{P _CMAX,P _{SS_OFFSET}+10log ₁₀(M _SS(i))+P _{O_PUSCH}(j)+α(j)·PL+f(i)}；

Wherein, i is subframe sequence number; P _cMAXbe the maximum transmit power of UE, or UE is for the maximum transmit power of the communication service of not common secure context; P _{sS_OFFSET}it is the power offset value for synchronizing signal; M _sSi () is the Physical Resource Block number that synchronizing signal takies; P _{o_PUSCH}j () is power parameter value; α (j) is path loss adjusted value; PL is the path loss values of UE to cellular network; F (i) is the power adjustment of present physical Uplink Shared Channel PUSCH; When the PUSCH transmission of UE is semi-continuous scheduling, j=0, when the PUSCH transmission of UE is dynamic dispatching, j=1, when the PUSCH transmission of UE is Stochastic accessing scheduling, j=2.

7. method according to claim 1, is characterized in that, the described synchronizing signal that will send is Equations of The Second Kind synchronizing signal, and UE and cellular network are in connection status; Then, determine that the method for the transmitted power of the Equations of The Second Kind synchronizing signal that will send comprises:

The transmitted power P of the Equations of The Second Kind synchronizing signal that will send is determined according to following formula _sS(i):

P _SS(i)＝min{P _CMAX,P _{SS_OFFSET}+10log ₁₀(M _SS(i))+P _{O_PUSCH}(j)+α(j)·PL+f(i)}；

Wherein, i is subframe sequence number; P _cMAXthe maximum transmit power of UE, or the maximum transmit power that UE communicates for device-to-device D2D; P _{sS_OFFSET}it is the power offset value for synchronizing signal; M _sSi () is the Physical Resource Block number that synchronizing signal takies; P _{o_PUSCH}j () is power parameter value; α (j) is path loss adjusted value; PL is the path loss values of UE to cellular network; F (i) is the power adjustment of current PUSCH; When the PUSCH transmission of UE is semi-continuous scheduling, j=0, when the PUSCH transmission of UE is dynamic dispatching, j=1, when the PUSCH transmission of UE is Stochastic accessing scheduling, j=2.

8. method according to claim 1, is characterized in that, the described synchronizing signal that will send is Equations of The Second Kind synchronizing signal, and UE and cellular network are in connection status; Then, determine that the method for the transmitted power of the synchronizing signal that will send comprises:

The transmitted power P of the Equations of The Second Kind synchronizing signal that will send is determined according to following formula _sS(i):

P _SS(i)＝min{P _CMAX(m),P _{SS_OFFSET}(m)+10log ₁₀(M _SS(i))+P _{O_PUSCH}(j)+α(j)·PL+f(i)}；

Wherein, m=0,1, when communication service for public safety aspect, m=0, when communication service for not common secure context, m=1;

P _cMAX(0) be the maximum transmit power of UE, or UE is for the maximum transmit power of the communication service of public safety aspect; P _cMAX(1) be the maximum transmit power of UE, or UE is for the maximum transmit power of the communication service of not common secure context;

P _{sS_OFFSET}(0) be the power offset value of synchronizing signal of communication service for public safety aspect, P _{sS_OFFSET}(1) be the power offset value of synchronizing signal of communication service for not common secure context;

I is subframe sequence number; M _sSi () is the Physical Resource Block number that synchronizing signal takies; P _{o_PUSCH}j () is power parameter value; α (j) is path loss adjusted value; PL is the path loss values of UE to cellular network; F (i) is the power adjustment of current PUSCH; When the PUSCH transmission of UE is semi-continuous scheduling, j=0, when the PUSCH transmission of UE is dynamic dispatching, j=1, when the PUSCH transmission of UE is Stochastic accessing scheduling, j=2.

9. method according to claim 1, is characterized in that, the described synchronizing signal that will send is Equations of The Second Kind synchronizing signal, the 3rd homochronousness signal or the 4th homochronousness signal; Then, determine that the method for the transmitted power of the synchronizing signal that will send comprises:

The path loss PL:PL=P of the synchronizing signal received according to following formulae discovery UE _tX-E _rX, wherein, P _tXthe transmitted power of the synchronizing signal received described in being, E _rXwhen being the synchronizing signal received described in UE receives, described in the received signal strength of synchronizing signal that receives;

According to the path loss PL of the described synchronizing signal received, determine the transmitted power of the described synchronizing signal that will send;

Wherein, when the described synchronizing signal that will send is Equations of The Second Kind synchronizing signal, the described synchronizing signal received is first kind synchronizing signal, when the described synchronizing signal that will send is the 3rd homochronousness signal, the described synchronizing signal received is Equations of The Second Kind synchronizing signal, when the described synchronizing signal that will send is the 4th homochronousness signal, described in the synchronizing signal that receives be first kind synchronizing signal or the 3rd homochronousness signal.

10. method according to claim 9, is characterized in that, according to the path loss PL of the described synchronizing signal received, determines that the method for the transmitted power of the described synchronizing signal that will send comprises:

The transmitted power of the synchronizing signal that will send described in determining is synchronizing signal target received power P0_SS and described PL sum.

11. methods according to claim 9, is characterized in that, the described synchronizing signal that will send is Equations of The Second Kind synchronizing signal, and UE and cellular network are in connection status; Then, according to the path loss PL of the described synchronizing signal received, determine that the method for the transmitted power of the described synchronizing signal that will send comprises:

Calculate synchronizing signal target received power P0_SS and described PL sum P_SS ₀;

The transmitted power P_SS of the Equations of The Second Kind synchronizing signal that will send is determined according to following formula:

$\left\{\begin{array}{c}P\_\mathrm{SS}=\min \{P_{\mathrm{SS}}\left(i\right),P\_{\mathrm{SS}}_0\}\\ P_{\mathrm{SS}}\left(i\right)=\min \{P_{\mathrm{CMAX}},P_{\mathrm{SS}\_\mathrm{OFFSET}}+10{\log }_{10}\left(M_{\mathrm{SS}}\left(i\right)\right)+P_{O\_\mathrm{PUSCH}}\left(j\right)+\mathrm{\α}\left(j\right)\·\mathrm{PL}+f\left(i\right)\}\end{array};\right.$

Wherein, i is subframe sequence number; P _cMAXthe maximum transmit power of UE, or the maximum transmit power that UE communicates for D2D; P _{sS_OFFSET}it is the power offset value for synchronizing signal; M _sSi () is the Physical Resource Block number that synchronizing signal takies; P _{o_PUSCH}j () is power parameter value; α (j) is path loss adjusted value; PL is the path loss values of UE to cellular network; F (i) is the power adjustment of current PUSCH; When the PUSCH transmission of UE is semi-continuous scheduling, j=0, when the PUSCH transmission of UE is dynamic dispatching, j=1, when the PUSCH transmission of UE is Stochastic accessing scheduling, j=2.

12. methods according to claim 9, is characterized in that, the described synchronizing signal that will send is Equations of The Second Kind synchronizing signal, and UE and cellular network are in connection status; Then, according to the path loss PL of the described synchronizing signal received, determine that the method for the transmitted power of the described synchronizing signal that will send comprises:

Calculate synchronizing signal target received power P0_SS and described PL sum P_SS ₀;

The transmitted power P_SS of the Equations of The Second Kind synchronizing signal that will send is determined according to following formula:

$\left\{\begin{array}{c}P\_\mathrm{SS}=\min \{P_{\mathrm{SS}}\left(i\right),P\_{\mathrm{SS}}_0\}\\ P_{\mathrm{SS}}\left(i\right)=\min \{P_{\mathrm{CMAX}}\left(m\right),P_{\mathrm{SS}\_\mathrm{OFFSET}}+\left(m\right)10{\log }_{10}\left(M_{\mathrm{SS}}\left(i\right)\right)+P_{O\_\mathrm{PUSCH}}\left(j\right)+\mathrm{\α}\left(j\right)\·\mathrm{PL}+f\left(i\right)\}\end{array};\right.$

Wherein, m=0,1, when communication service for public safety aspect, m=0, when communication service for not common secure context, m=1;

P _cMAX(0) be the maximum transmit power of UE, or UE is for the maximum transmit power of the communication service of public safety aspect; P _cMAX(1) be the maximum transmit power of UE, or UE is for the maximum transmit power of the communication service of not common secure context;

P _{sS_OFFSET}(0) be the power offset value of synchronizing signal of communication service for public safety aspect, P _{sS_OFFSET}(1) be the power offset value of synchronizing signal of communication service for not common secure context;

I is subframe sequence number; M _sSi () is the Physical Resource Block number that synchronizing signal takies; P _{o_PUSCH}j () is power parameter value; α (j) is path loss adjusted value; PL is the path loss values of UE to cellular network; F (i) is the power adjustment of current PUSCH; When the PUSCH transmission of UE is semi-continuous scheduling, j=0, when the PUSCH transmission of UE is dynamic dispatching, j=1, when the PUSCH transmission of UE is Stochastic accessing scheduling, j=2.

13. methods according to claim 1, is characterized in that, the described synchronizing signal that will send is first kind synchronizing signal, Equations of The Second Kind synchronizing signal or the 4th homochronousness signal; Then, determine that the method for the transmitted power of the synchronizing signal that will send comprises:

Determine the initial transmission power of the described synchronizing signal that will send;

From the initial time of the synchronizing signal that will send described in sending according to described initial transmission power, following operation is performed according to prefixed time interval, until the transmitted power that have received synchronizing signal that other UE send or the described synchronizing signal that will send reaches the maximum transmit power of UE: judge whether to have received the synchronizing signal that other UE send, if do not receive, then the transmitted power of the described synchronizing signal that will send is increased preset increments value;

Wherein, when the described synchronizing signal that will send is first kind synchronizing signal, the synchronizing signal that other UE described send is Equations of The Second Kind synchronizing signal; When the described synchronizing signal that will send is Equations of The Second Kind synchronizing signal, the synchronizing signal that other UE described send is the 3rd homochronousness signal; When the described synchronizing signal that will send is the 4th homochronousness signal, the synchronizing signal that other UE described send is Equations of The Second Kind synchronizing signal.

14. methods according to claim 13, is characterized in that, determine that the initial transmission power of the described synchronizing signal that will send is for presetting transmission power value.

15. methods according to claim 13, is characterized in that, when the described synchronizing signal that will send is Equations of The Second Kind synchronizing signal, determine that the method for the initial transmission power of the described synchronizing signal that will send comprises:

The path loss PL:PL=P of the first kind synchronizing signal received according to following formulae discovery UE _tX-E _rX, wherein, P _tXthe transmitted power of first kind synchronizing signal, E _rXuE when receiving first kind synchronizing signal, the received signal strength of first kind synchronizing signal;

According to the path loss PL of described first kind synchronizing signal, determine the initial transmission power of the Equations of The Second Kind synchronizing signal that will send.

16. methods according to claim 15, is characterized in that, according to the path loss PL of described first kind synchronizing signal, determine that the method for the initial transmission power of the Equations of The Second Kind synchronizing signal that will send comprises:

Determine that the initial transmission power of the Equations of The Second Kind synchronizing signal that will send is synchronizing signal target received power P0_SS and described PL sum.

17. methods according to claim 15, is characterized in that, when UE and cellular network are in connection status, according to the path loss PL of described first kind synchronizing signal, determine that the method for the initial transmission power of the Equations of The Second Kind synchronizing signal that will send comprises:

Calculate synchronizing signal target received power P0_SS and described PL sum P_SS ₀;

The initial transmission power P_SS of the Equations of The Second Kind synchronizing signal that will send is determined according to following formula:

$\left\{\begin{array}{c}P\_\mathrm{SS}=\min \{P_{\mathrm{SS}}\left(i\right),P\_{\mathrm{SS}}_0\}\\ P_{\mathrm{SS}}\left(i\right)=\min \{P_{\mathrm{CMAX}},P_{\mathrm{SS}\_\mathrm{OFFSET}}+10{\log }_{10}\left(M_{\mathrm{SS}}\left(i\right)\right)+P_{O\_\mathrm{PUSCH}}\left(j\right)+\mathrm{\α}\left(j\right)\·\mathrm{PL}+f\left(i\right)\}\end{array};\right.$

Wherein, i is subframe sequence number; P _cMAXthe maximum transmit power of UE, or the maximum transmit power that UE communicates for D2D; P _{sS_OFFSET}it is the power offset value for synchronizing signal; M _sSi () is the Physical Resource Block number that synchronizing signal takies; P _{o_PUSCH}j () is power parameter value; α (j) is path loss adjusted value; PL is the path loss values of UE to cellular network; F (i) is the power adjustment of current PUSCH; When the PUSCH transmission of UE is semi-continuous scheduling, j=0, when the PUSCH transmission of UE is dynamic dispatching, j=1, when the PUSCH transmission of UE is Stochastic accessing scheduling, j=2.

18. methods according to claim 15, is characterized in that, when UE and cellular network are in connection status, according to the path loss PL of described first kind synchronizing signal, determine that the method for the initial transmission power of the Equations of The Second Kind synchronizing signal that will send comprises:

Calculate synchronizing signal target received power P0_SS and described PL sum P_SS ₀;

The initial transmission power P_SS of the Equations of The Second Kind synchronizing signal that will send is determined according to following formula:

$\left\{\begin{array}{c}P\_\mathrm{SS}=\min \{P_{\mathrm{SS}}\left(i\right),P\_{\mathrm{SS}}_0\}\\ P_{\mathrm{SS}}\left(i\right)=\min \{P_{\mathrm{CMAX}}\left(m\right),P_{\mathrm{SS}\_\mathrm{OFFSET}}+\left(m\right)10{\log }_{10}\left(M_{\mathrm{SS}}\left(i\right)\right)+P_{O\_\mathrm{PUSCH}}\left(j\right)+\mathrm{\α}\left(j\right)\·\mathrm{PL}+f\left(i\right)\}\end{array};\right.$

Wherein, m=0,1, when communication service for public safety aspect, m=0, when communication service for not common secure context, m=1;

P _cMAX(0) be the maximum transmit power of UE, or UE is for the maximum transmit power of the communication service of public safety aspect; P _cMAX(1) be the maximum transmit power of UE, or UE is for the maximum transmit power of the communication service of not common secure context;

P _{sS_OFFSET}(0) be the power offset value of synchronizing signal of communication service for public safety aspect, P _{sS_OFFSET}(1) be the power offset value of synchronizing signal of communication service for not common secure context;

I is subframe sequence number; M _sSi () is the Physical Resource Block number that synchronizing signal takies; P _{o_PUSCH}j () is power parameter value; α (j) is path loss adjusted value; PL is the path loss values of UE to cellular network; F (i) is the power adjustment of current PUSCH; When the PUSCH transmission of UE is semi-continuous scheduling, j=0, when the PUSCH transmission of UE is dynamic dispatching, j=1, when the PUSCH transmission of UE is Stochastic accessing scheduling, j=2.

19. methods according to claim 1, is characterized in that, also comprise:

UE, according to the predetermined power control method of correspondence, determines the transmitted power of the channel signal that will send; Wherein, the described channel signal that will send finds signal, or, be communication channel or signal;

UE according to the transmitted power determined, the channel signal that will send described in sending.

20. methods according to claim 19, is characterized in that, the described channel signal that will send finds signal, or, be communication channel or signal; Then, determine that the method for the transmitted power of the channel signal that will send comprises:

Determine that the transmitted power of the described channel signal that will send is for presetting transmission power value.

21. methods according to claim 19, is characterized in that, the described channel signal that will send finds signal; Then, when UE and cellular network are in connection status, determine that the method for the transmitted power of the channel signal that will send comprises:

The transmitted power P of the discovery signal that will send is determined according to following formula _dis(i):

P _dis(i)=min{P _cMAX, P _{dis_OFFSET}+ 10log ₁₀(M _dis(i))+P _{o_PUSCH}(j)+α (j) PL+f (i) }; Or, P _dis(i)=min{P _{dis_MAX}, P _{dis_OFFSET}+ 10log ₁₀(M _dis(i))+P _{o_PUSCH}(j)+α (j) PL+f (i) };

Wherein, i is subframe sequence number; P _cMAXthe maximum transmit power that UE allows, or the maximum transmit power that UE communicates for D2D; P _{dis_MAX}it is the maximum transmit power finding signal; P _{dis_OFFSET}it is the power offset value for finding signal; M _disi () is the Physical Resource Block number finding that signal takies; P _{o_PUSCH}j () is power parameter value; α (j) is path loss adjusted value; PL is the path loss values of UE to cellular network; F (i) is the power adjustment of current PUSCH; When the PUSCH transmission of UE is semi-continuous scheduling, j=0, when the PUSCH transmission of UE is dynamic dispatching, j=1, when the PUSCH transmission of UE is Stochastic accessing scheduling, j=2.

22. methods according to claim 19, is characterized in that, the described channel signal that will send is communication channel or signal; Then, when UE and cellular network are in connection status, determine that the method for the transmitted power of the channel signal that will send comprises:

The transmitted power P of communication channel or the signal that will send is determined according to following formula _d2D(i):

P _d2D(i)=min{P _cMAX, P _{d2D_OFFSET}+ 10log ₁₀(M _d2D(i))+P _{o_PUSCH}(j)+α (j) PL+f (i) }; Or, P _d2D(i)=min{P _{d2D_MAX}, P _{d2D_OFFSET}+ 10log ₁₀(M _d2D(i))+P _{o_PUSCH}(j)+α (j) PL+f (i) };

Wherein, P _cMAXthe maximum transmit power that UE allows, or the maximum transmit power that UE communicates for D2D; P _{d2D_OFFSET}it is the power offset value for communication channel or signal; I is subframe sequence number; M _d2Di () is the Physical Resource Block number that communication channel or signal take; P _{o_PUSCH}j () is power parameter value; α (j) is path loss adjusted value; PL is the path loss values of UE to cellular network; F (i) is the power adjustment of current PUSCH; P _{d2D_MAX}it is the maximum transmit power of communication channel or signal; When the PUSCH transmission of UE is semi-continuous scheduling, j=0, when the PUSCH transmission of UE is dynamic dispatching, j=1, when the PUSCH transmission of UE is Stochastic accessing scheduling, j=2.

User equipment (UE) in 23. 1 kinds of Long Term Evolution LTE system, is characterized in that, described UE comprises:

Determination module, for the predetermined power control method according to correspondence, determines the transmitted power of the synchronizing signal that will send;

Sending module, for the transmitted power determined according to described determination module, the synchronizing signal that will send described in sending to other UE;

Wherein, the described synchronizing signal that will send does not have the subscriber equipment OCU of the network coverage when not receiving the synchronizing signal that arbitrary UE sends, to the first kind synchronizing signal that the subscriber equipment ICU that there is the network coverage sends;

Or the described synchronizing signal that will send is ICU after receiving the first kind synchronizing signal that OCU sends, the Equations of The Second Kind synchronizing signal of transmission;

Or the described synchronizing signal that will send is OCU after receiving the Equations of The Second Kind synchronizing signal that ICU sends, the 3rd homochronousness signal of transmission;

Or the described synchronizing signal that will send is OCU after receiving the first kind synchronizing signal or the 3rd homochronousness signal that other OCU send, the 4th homochronousness signal of transmission.