CN106375930A

CN106375930A - Device-to-device (D2D) communication method and apparatus

Info

Publication number: CN106375930A
Application number: CN201510435417.5A
Authority: CN
Inventors: 贺海港; 吴栓栓
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2015-07-22
Filing date: 2015-07-22
Publication date: 2017-02-01
Also published as: WO2017012587A1

Abstract

The invention discloses a device-to-device (D2D) communication method and apparatus. The D2D communication method comprises the following steps: first user equipment (UE) obtaining a first power value, wherein the first power value comprises a maximum standard power value of the first UE for sending data; the first UE obtaining a second power value, wherein the second power value comprises a power value for D2D communication between the first UE and the second UE; and the first UE comparing the first power value and the second power value with a third power value, determining that minimum power is output power used for sending the data to the second UE by the first UE, and the third power value comprises a maximum emission power value of the first UE. According to the invention, the output power used for sending the data to the second UE by the first UE is determined, and under the condition that D2D communication performance is not affected, it is ensured that interference power of the first UE for a base station does not go beyond a first target power value configured for an RRC signaling of the base station.

Description

A kind of device-to-device communication means and device

Technical field

The present invention relates to Internet technology, espespecially a kind of device-to-device communication means and device.

Background technology

With the diversified development of mobile communication business, and device-to-device (device-to-device, referred to as D2d) communication receives significant attention.D2d communication also referred to as adjacent service (proximity service, Abbreviation prose), that is, it is located at first user equipment (user equipment, the letter of same cellular cell Claim ue) and the 2nd ue directly pass through to eat dishes without rice or wine into row data communication, and without base station and core net turn Send out.

In prior art, when a ue and the 2nd ue carry out d2d and communicate, a ue or second Ue can detect that base station is sent to the phich channel of the 3rd ue, and the 3rd ue is to enter line number with base station According to communication ue, if detect negative acknowledgement (negative acknowledgement, referred to as Nack) it is determined that the d2d between a ue and the 2nd ue communicates, the cellular communication to base station is made Becoming interference, thus reducing d2d transmit power, otherwise, then having lifted d2d transmit power.

However, during the realization of prior art, a ue or the 2nd ue cannot determine that base station is sent out The nack sending, if because itself d2d communication causes, thus leading to a ue and the 2nd ue Between the unnecessary reduction of d2d power of communications, and then reduce d2d communication performance.

Content of the invention

In order to solve above-mentioned technical problem, the invention provides a kind of device-to-device communication means and dress Put, the performance in order to solve the problems, such as d2d communication is relatively low.

In order to reach the object of the invention, the invention provides a kind of device-to-device communication means, comprising: A kind of device-to-device communication means is it is characterised in that include:

First user equipment ue obtains the first performance number, and described first performance number includes a described ue and sends The maximum calibration power value of data, described maximum calibration power value include a described ue adopt described When big calibration power value sends data, the performance number of the described ue that base station receives is less than or equal to base station The first object performance number that wireless heterogeneous networks rrc signaling is configured；

A described ue obtains the second performance number, and described second performance number includes a described ue and second Ue carries out the performance number of device-to-device d2d communication；

Described first performance number, described second performance number and the 3rd performance number are compared by a described ue Relatively, determine that minimal power values are that a described ue sends the output of data, institute to described 2nd ue State the maximum transmission power value that the 3rd performance number includes a described ue.

Further, described first user equipment ue obtains the first performance number, comprising:

A described ue obtains the first kind open Loop Power control signaling that base station sends, described first kind open loop Power Control signaling includes following any one or a combination thereof: first object power parameter, the first path loss are mended Repay factor parameter；

A described ue obtains the metrical information that base station sends, and determines the first path loss, described first path loss bag Include the up path loss between a described ue and described base station, described metrical information includes following at least one Plant or combination in any: public reference signal crs, channel state information reference signals csi-rs；

A described ue, according to described first kind open Loop Power control signaling and described first path loss, determines One performance number.

Further, a described ue is according to described first kind open Loop Power control signaling and the described first via Damage, determine the first performance number, comprising:

A described ue is according to p_{Celluar, c}(i)=10log10 (m_{D2d, c}(i))+p_{O_celluar, c}+α_{Celluar, c}·pl_{Celluar, c}, obtain Obtain described first performance number p in cellular cell c, subframe i for the described ue_{Celluar, c}(i), wherein, m_{D2d, c}I () represent cellular cell c, in subframe i, the Resource Block rb number that the transmission of physical channel is used Mesh, p_{O_celluar, c}Represent the first object receiving power of described physical channel on the c of cellular cell, α_{Celluar, c}Represent the first road loss compensation factor of described physical channel on the c of cellular cell, described physical channel Including: physics wing control channel pscch or physics wing shared channel pssch or physics wing are sent out Existing channel psdch.

Further, a described ue obtains the second performance number, comprising:

A described ue obtains the Equations of The Second Kind open Loop Power control signaling that base station sends, described Equations of The Second Kind open loop Power Control signaling includes following any one or a combination thereof: the second target power parameter, the second path loss are mended Repay factor parameter；

A described ue obtains the parameter response message that described 2nd ue sends, and determines the second path loss, described Second path loss includes carrying out the path loss of d2d communication link, described ginseng between a described ue and the 2nd ue Number response messages include following at least any one or a combination thereof: Sounding Reference Signal srs, demodulation Reference signal dmrs, confirmation character ack, negative response nack；

A described ue, according to described Equations of The Second Kind open Loop Power control signaling and described second path loss, determines Two performance numbers.

Further, a described ue is according to described Equations of The Second Kind open Loop Power control signaling and described second tunnel Damage, determine the second performance number, comprising:

A described ue is according to below equation:

p_{D2d, c}(i)=10log₁₀(m_{D2d, c}(i))+p_{O_d2d, c}+α_{D2d, c}·pl_{D2d, c},

Obtain described second performance number p_{D2d, c}(i), wherein, the second target power parameter p_{O_d2d, c}It is carrier wave c D2d target received power in upper d2d link, α_{D2d, c}It is the second road loss compensation factor.pl_{D2d, c}It is Described second path loss of d2d communication link between a described ue and described 2nd ue.

Further, after a described ue obtains the Equations of The Second Kind open Loop Power control signaling that base station sends, Also include:

A described ue obtains Equations of The Second Kind close-loop power control signaling, described Equations of The Second Kind close-loop power control letter Order includes following any one or a combination thereof: the first parameter, the second parameter, described first parameter is described First ue configuration close-loop power control adjustment amount, described second parameter be described first ue configuration with The related amount of device-to-device modulation coding mode d2d mcs；

A described ue, according to described Equations of The Second Kind open Loop Power control signaling and described second path loss, determines Two performance numbers, comprising:

A described ue is according to described Equations of The Second Kind open Loop Power control signaling, described second path loss and described Two class close-loop power control signalings, determine the second performance number.

Further, a described ue is according to described Equations of The Second Kind open Loop Power control signaling, described second tunnel Damage and described Equations of The Second Kind close-loop power control signaling, determine the second performance number, comprising:

A described ue is according to below equation:

p_{D2d, c}(i)=10log₁₀(m_{D2d, c}(i))+p_{O_d2d, c}+α_{D2d, c}·pl_{D2d, c}+δ_{Tf_d2d, c}(i)+f_{D2d, c}(i)

Obtain described second performance number p_{D2d, c}(i), wherein, the second target power parameter p_{O_d2d, c}It is carrier wave c D2d target received power in upper d2d link, α_{D2d, c}It is the second road loss compensation factor.pl_{D2d, c}It is The path loss estimated value of unicast d2d link between a described ue and described 2nd ue, described second ginseng Number δ_{Tf_d2d, c}I () is the amount related to d2d mcs, described first parameter f_{D2d, c}I () is close-loop power control Adjustment amount.

Further, a described ue is by described first performance number, described second performance number and the 3rd power Value is compared, and determines that minimum power is that a described ue sends the output work of data to described 2nd ue Rate, described 3rd performance number includes the maximum transmission power value of a described ue, comprising:

Described first performance number and described second performance number are compared by a described ue, determine minima For the first output；

A described ue according to described first output and described Equations of The Second Kind close-loop power control signaling, really Fixed second output；

Described second output and the 3rd performance number are compared by a described ue, determine that minima is Output.

Further, a described ue is according to described first output and described Equations of The Second Kind closed power control Signaling processed, determines the second output, comprising:

A described ue, by described first output and described first parameter summation, obtains described second defeated Go out power；Or

A described ue, by described first output and described second parameter summation, obtains described second defeated Go out power；Or

Described first output, described first parameter and described second parameter are sued for peace by a described ue, Obtain described second output.

Present invention also offers a kind of device-to-device communicator, comprising:

First acquisition module, for obtaining the first performance number, described first performance number includes a described ue Send the maximum calibration power value of data, described maximum calibration power value includes a described ue and adopts institute When stating maximum calibration power value transmission data, the performance number that base station receives a described ue is less than or equal to base The first object performance number that rrc signaling of standing is configured；

Second acquisition module, for obtaining the second performance number, described second performance number includes a described ue Carry out the performance number of device-to-device d2d communication with the 2nd ue；

Determining module, for carrying out described first performance number, described second performance number and the 3rd performance number Relatively, determine that minimum power is that a described ue sends the output of data, institute to described 2nd ue State the maximum transmission power value that the 3rd performance number includes a described ue.

Further, described first acquisition module, obtain that base station sends specifically for a described ue the One class open Loop Power control signaling, described first kind open Loop Power control signaling include following any one or A combination thereof: first object power parameter, the first road loss compensation factor parameter；Obtain the measurement that base station sends Information, determines the first path loss, and described first path loss includes up between a described ue and described base station Path loss, described metrical information includes following at least one or combination in any: public reference signal crs, Channel state information reference signals csi-rs；According to described first kind open Loop Power control signaling and described One path loss, determines the first performance number.

Further, described first acquisition module, specifically for basis p_{Celluar, c}(i)=10log10 (m_{D2d, c}(i))+p_{O_celluar, c}+α_{Celluar, c}·pl_{Celluar, c}, obtain a described ue in honeybee Described first performance number p in nest cell c, subframe i_{Celluar, c}(i), wherein, m_{D2d, c}I () represents that honeycomb is little In area c, subframe i, the Resource Block rb number that the transmission of physical channel is used, p_{O_celluar, c}Represent The first object receiving power of described physical channel, α on the c of cellular cell_{Celluar, c}Represent on the c of cellular cell First road loss compensation factor of described physical channel, described physical channel includes: physics wing control channel Pscch or physics wing shared channel pssch or physics wing find channel psdch.

Further, described second acquisition module, specifically for obtaining the Equations of The Second Kind open loop work(that base station sends Rate control signaling, described Equations of The Second Kind open Loop Power control signaling includes following any one or a combination thereof: Two target power parameters, the second road loss compensation factor parameter；Obtain the parameter response that described 2nd ue sends Information, determines the second path loss, and described second path loss includes carrying out between a described ue and the 2nd ue The path loss of d2d communication link, described parameter response message includes following at least any one or a combination thereof: Sounding Reference Signal srs, demodulated reference signal dmrs, confirmation character ack, negative response nack；According to described Equations of The Second Kind open Loop Power control signaling and described second path loss, determine the second power Value.

Further, described second acquisition module, specifically for according to below equation:

p_{D2d, c}(i)=10log₁₀(m_{D2d, c}(i))+p_{O_d2d, c}+α_{D2d, c}·pl_{D2d, c},

Further, described second acquisition module, is additionally operable to obtain Equations of The Second Kind close-loop power control signaling, Described Equations of The Second Kind close-loop power control signaling includes following any one or a combination thereof: the first parameter, second Parameter, described first parameter is the close-loop power control adjustment amount of a described ue configuration, described second ginseng Number is the amount related to device-to-device modulation coding mode d2d mcs of a described ue configuration；Root According to described Equations of The Second Kind open Loop Power control signaling, described second path loss and described Equations of The Second Kind close-loop power control Signaling, determines the second performance number.

p_{D2d, c}(i)=10log₁₀(m_{D2d, c}(i))+p_{O_d2d, c}+α_{D2d, c}·pl_{D2d, c},+δ_{Tf_d2d, c}(i)+f_{D2d, c}(i)；

Wherein, p_{D2d, c}I () is described second performance number, the second target power parameter p_{O_d2d, c}It is on carrier wave c D2d target received power in d2d link, α_{D2d, c}It is the second road loss compensation factor, pl_{D2d, c}It is institute State the path loss estimated value of unicast d2d link between a ue and described 2nd ue, described second parameter δ_{Tf_d2d, c}I () is the amount related to device-to-device modulation coding mode d2d mcs, described first parameter f_{D2d, c}I () is close-loop power control adjustment amount.

17th, device according to claim 14, it is characterised in that described determining module, is specifically used In being compared described first performance number and described second performance number, determine that minima is the first output work Rate；According to described first output and described Equations of The Second Kind close-loop power control signaling, determine the second output Power；Described second output and the 3rd performance number are compared, determine that minima is output work Rate.

Further, described determining module, specifically for joining described first output with described first Number summation, obtains described second output；Or, by described first output and described second ginseng Number summation, obtains described second output；Or, by described first output, described first ginseng Number and described second parameter summation, obtain described second output.

Compared with prior art, the present invention includes, and first user equipment ue obtains the first performance number, described First performance number includes the maximum calibration power value that a described ue sends data, described maximum standard work( When rate value includes a described ue using described maximum calibration power value transmission data, the institute that base station receives State the first object performance number that the performance number of a ue is configured less than or equal to base station rrc signaling；Described First ue obtains the second performance number, and described second performance number includes a described ue and the 2nd ue and carries out The performance number of device-to-device d2d communication；A described ue by described first performance number, described second Performance number and the 3rd performance number are compared, and determine that minimum power is a described ue to described 2nd ue Send the output of data, described 3rd performance number includes the maximum transmission power value of a described ue. Achieve the determination that a ue sends the output of data to the 2nd ue, and then do not affect d2d In the case of communication performance it is ensured that a ue to the jamming power of base station not over base station rrc signaling The first object performance number being configured.

Other features and advantages of the present invention will illustrate in the following description, and, partly from froming the perspective of Become apparent in bright book, or understood by implementing the present invention.The purpose of the present invention is excellent with other Point can be realized by specifically noted structure in description, claims and accompanying drawing and obtain ?.

Brief description

Accompanying drawing is used for providing technical solution of the present invention is further understood, and constitutes one of description Point, it is used for explaining technical scheme together with embodiments herein, do not constitute to the present invention The restriction of technical scheme.

Fig. 1 is the schematic flow sheet of present device communication means one embodiment；

Fig. 2 is the schematic flow sheet of present device communication means two embodiment；

Fig. 3 is the schematic flow sheet of present device communication means three embodiment；

Fig. 4 is the schematic flow sheet of present device communication means four embodiment；

Fig. 5 is the schematic flow sheet of present device communication means five embodiment；

Fig. 6 is the schematic flow sheet of present device communication means six embodiment；

Fig. 7 is the schematic flow sheet of present device communication means seven embodiment；

Fig. 8 is the structural representation of present device communicator one embodiment.

Specific embodiment

For making the object, technical solutions and advantages of the present invention become more apparent, below in conjunction with accompanying drawing Embodiments of the invention are described in detail.It should be noted that in the case of not conflicting, this Shen Please in embodiment and the feature in embodiment can mutual combination in any.

Device-to-device communication means provided in an embodiment of the present invention specifically can apply to a ue and When two ue carry out d2d communication, wherein, a ue or the 2nd ue can be mobile phone terminal or intelligence Any terminal unit such as computer.The device-to-device communication means that the present embodiment provides specifically can be by setting For to execute to communication apparatus, this device-to-device communicator can be integrated in terminal unit, Or it is separately provided, wherein, this device-to-device communicator can be in the way of using software and/or hardware To realize.To the present embodiment, the device-to-device communication means providing and device are carried out in detail below Bright.

Fig. 1 is the schematic flow sheet of present device communication means one embodiment, as shown in figure 1, this The equipment communication method of bright offer, comprising:

Step 101, first user equipment ue obtain the first performance number.

The applicable scene of the present embodiment is: a ue and the 2nd ue carries out d2d communication, i.e. a ue Link and the 2nd ue between is signal link, and base station can also receive the number that a ue sends simultaneously According to that is, the link between base station and a ue is interfering link.The present embodiment according to signal link and is done The link-quality disturbing link determines the transmission power of d2d.

In the present embodiment, described first performance number includes the maximum standard that a described ue sends data Performance number, described maximum calibration power value is included a described ue and is sent out using described maximum calibration power value When sending data, the performance number of the described ue that base station receives is configured less than or equal to base station rrc signaling First object performance number.For example, under the scene that a ue is communicated with the 2nd ue2, first The signal of ue transmitting reaches base station after path loss decay, if the signal intensity that base station receives is more than base station The first object power that rrc signaling is configured then it is assumed that ue1 causes strong jamming to base station, that is, Say that a ue launches the performance number of data more than maximum calibration power value.

First performance number is obtained for first user equipment ue and at least includes implementations below:

The first implementation, the first performance number that a described ue direct access base station sends.

Second implementation, a described ue obtains the first kind open Loop Power control letter that base station sends Order, described first kind open Loop Power control signaling includes following any one or a combination thereof: first object work( Rate parameter, the first road loss compensation factor parameter；A described ue obtains the metrical information that base station sends, really Fixed first path loss, described first path loss includes the up path loss between a described ue and described base station, institute State metrical information and include following at least one or combination in any: public reference signal crs, channel status Information reference signal csi-rs；A described ue is according to described first kind open loop power value control signaling and institute State the first path loss, determine the first performance number.

For example, a described ue is according to described first kind open Loop Power control signaling and the described first via Damage, determine the first performance number, comprising:

A described ue is according to p_{Celluar, c}(i)=10log10 (m_{D2d, c}(i))+p_{O_celluar, c}+α_{Celluar, c}·pl_{Celluar, c}, obtain Obtain described first performance number p in cellular cell c, subframe i for the described ue_{Celluar, c}(i), wherein, m_{D2d, c}I () represent cellular cell c, in subframe i, the Resource Block rb number that the transmission of physical channel is used Mesh, p_{O_celluar, c}Represent the target received power of described physical channel on the c of cellular cell, α_{Celluar, c} Represent the first road loss compensation factor of described physical channel on the c of cellular cell, described physical channel includes: Physics wing control channel (physical sidelink control channel, abbreviation pscch) or physics Wing shared channel (physical sidelink shared channel, abbreviation pssch) or physics wing are sent out Existing channel (physical sidelink discovery channel, abbreviation psdch).

Step 102, a ue obtain the second performance number.

The second performance number in the present embodiment includes: a described ue and the 2nd ue carries out device-to-device The performance number of d2d communication.

Second performance number is obtained for a ue and at least includes implementations below:

The second performance number that the first implementation, a ue direct access base station or the 2nd ue send.

Second implementation, a described ue obtains the Equations of The Second Kind open Loop Power control letter that base station sends Order, described Equations of The Second Kind open Loop Power control signaling includes following any one or a combination thereof: the second target work( Rate parameter, the second road loss compensation factor parameter；A described ue obtains the parameter that described 2nd ue sends Response message, determines the second path loss, and described second path loss includes entering between a described ue and the 2nd ue The path loss of row d2d communication link, described parameter response message includes following at least any one or its group Close: Sounding Reference Signal srs, demodulated reference signal dmrs, confirmation character ack, negative response nack；A described ue, according to described Equations of The Second Kind open Loop Power control signaling and described second path loss, determines Second performance number.

For example, a described ue is according to described Equations of The Second Kind open Loop Power control signaling and described second tunnel Damage, determine the second performance number, comprising:

A described ue is according to below equation:

p_{D2d, c}(i)=10log₁₀(m_{D2d, c}(i))+p_{O_d2d, c}+α_{D2d, c}·pl_{D2d, c},

The third implementation, on the basis of above-mentioned second implementation, a described ue obtains base Stand after the Equations of The Second Kind open Loop Power control signaling sending, also include:

A described ue obtains Equations of The Second Kind close-loop power control signaling, described Equations of The Second Kind close-loop power control letter Order includes following any one or a combination thereof: the first parameter, the second parameter, described first parameter is described First ue configuration close-loop power control adjustment amount, described second parameter be described first ue configuration with The related amount of d2d mcs；

Specifically, a described ue is according to described Equations of The Second Kind open Loop Power control signaling, described second path loss With described Equations of The Second Kind close-loop power control signaling, determine the second performance number, comprising:

A described ue is according to below equation:

Described first performance number, described second performance number and the 3rd performance number are carried out by step 103, a ue Relatively, determine that minimum power is that a described ue sends the output of data to described 2nd ue.

In the present embodiment, described 3rd performance number includes the maximum transmission power value of a described ue.

Described first performance number, described second performance number and the 3rd performance number are compared by the first ue Relatively, determine that minimum power is that the output that a described ue sends data to described 2nd ue at least wraps Include implementations below:

The first implementation, a ue is by described first performance number, described second performance number and the 3rd work( Rate value is compared, and determines that minimum power is that a described ue sends the output work of data to described base station Rate.

Second implementation, described first performance number and described second performance number are carried out by a described ue Relatively, determine that minima is the first output；A described ue is according to described first output and institute State Equations of The Second Kind close-loop power control signaling, determine the second output；A described ue is defeated by described second Go out power and the 3rd performance number is compared, determine that minima is output.

For example, a ue is according to described first output and described Equations of The Second Kind close-loop power control letter Order, determines the second output, may include that

In the present embodiment, first user equipment ue obtains the first performance number, and described first performance number includes A described ue sends the maximum calibration power value of data, and described maximum calibration power value includes institute When stating a ue using described maximum calibration power value transmission data, the described ue work(that base station receives The first object performance number that rate value is configured less than or equal to base station rrc signaling；A described ue obtains Take the second performance number, described second performance number includes a described ue and the 2nd ue and carries out device-to-device The performance number of d2d communication；A described ue is by described first performance number, described second performance number and the 3rd Performance number is compared, and determines that minimum power is that a described ue sends the defeated of data to described 2nd ue Go out power, described 3rd performance number includes the maximum transmission power value of a described ue.Achieve first Ue sends the determination of the output of data to the 2nd ue, and then is not affecting the feelings of d2d communication performance Under condition it is ensured that a ue jamming power of base station is configured not over base station rrc signaling first Target power value.

Fig. 2 is the schematic flow sheet of present device communication means two embodiment, as shown in Fig. 2 this The equipment communication method of bright offer, comprising:

Step 201, a ue, the first kind open Loop Power control signaling that is, ue1 acquisition base station sends, institute State first kind open Loop Power control signaling and include first object power parameter.

Step 202, a ue obtain the metrical information that base station sends, and determine the first path loss.

Described first path loss includes the up path loss between a described ue and described base station, described measurement letter Breath includes following at least one or combination in any: public reference signal crs, channel condition information reference Signal csi-rs；

Step 203, a ue are according to described first kind open loop power value control signaling and the described first via Damage, determine the first performance number.

Specifically, ue1 is in carrier wave c, i.e. cellular cell c, the first performance number p in subframe i_{Celluar, c}(i): p_{Celluar, c}(i)=10log₁₀(m_{D2d, c}(i))+p_{O_celluar, c}+pl_{Celluar, c}, wherein, m_{D2d, c}I () represents cellular cell In c, subframe i, the Resource Block rb number that the transmission of physical channel is used, p_{O_celluar, c}Represent in honeybee The first object receiving power of described physical channel in nest cell c, described physical channel includes: under physics Row control channel pscch or pssch or packet switched data channel psdch.

Step 204, a ue obtain the Equations of The Second Kind open Loop Power control signaling that base station sends, described Equations of The Second Kind Open Loop Power control signaling includes the second target power parameter；

Step 205, a ue obtain the parameter response message that described 2nd ue sends, and determine the second tunnel Damage.

Specifically, described second path loss includes carrying out d2d communication link between a described ue and the 2nd ue Path loss, described parameter response message includes following at least any one or a combination thereof: channel detection ginseng Examine signal srs, demodulated reference signal dmrs, confirm character ack, negative response nack；

Step 206, a ue according to described Equations of The Second Kind open Loop Power control signaling and described second path loss, really Fixed second performance number.

Specifically, a ue is according to below equation:

p_{D2d, c}(i)=10log₁₀(m_{D2d, c}(i))+p_{O_d2d, c}+pl_{D2d, c}

Obtain described second performance number p_{D2d, c}(i), wherein, the second target power parameter p_{O_d2d, c}It is carrier wave c D2d target received power in upper d2d link.pl_{D2d, c}It is a described ue and described 2nd ue Between d2d communication link described second path loss.

Described first performance number, described second performance number and the 3rd performance number are carried out by step 207, a ue Relatively, determine that minimum power is that a described ue sends the output of data to described base station.

In the present embodiment, described 3rd performance number p_{Cmax, c}I () is emission maximum work(on carrier wave c for the ue1 Rate.

Specifically, determine actual emission power in carrier wave c, subframe i for the ue1, that is, output is:

p_{D2d_final, c}(i)=min (p_{Cmax, c}(i), p_{Celluar, c}(i), p_{D2d, c}(i))

Step 208, ue1 are according to output p_{D2d_final, c}(i), the control signaling of transmitting d2d link or number According to or find signal.

Fig. 3 is the schematic flow sheet of present device communication means three embodiment, as shown in figure 3, this The equipment communication method of bright offer, comprising:

Step 301, a ue, the first kind open Loop Power control signaling that is, ue1 acquisition base station sends, institute State first kind open Loop Power control signaling and include first object power parameter and the first road loss compensation factor ginseng Number.

Step 302, a ue obtain the metrical information that base station sends, and determine the first path loss.

Step 303, a ue are according to described first kind open loop power value control signaling and the described first via Damage, determine the first performance number.

Specifically, ue1 is in carrier wave c, i.e. cellular cell c, the first performance number p in subframe i_{Celluar, c}(i):

p_{Celluar, c}(i)=10log₁₀(m_{D2d, c}(i))+p_{O_celluar, c}+α_{Celluar, c}·pl_{Celluar, c}, wherein, m_{D2d, c}I () represents In cellular cell c, subframe i, the Resource Block rb number that the transmission of physical channel is used, p_{O_celluar, c} Represent the first object receiving power of described physical channel on the c of cellular cell, α_{Celluar, c}Represent honeycomb First road loss compensation factor of described physical channel in cell c, described physical channel includes: physical down Control channel pscch or pssch or packet switched data channel psdch, α_{Celluar, c}For path loss Compensating factor parameter.

Step 304, a ue obtain the Equations of The Second Kind open Loop Power control signaling that base station sends, described Equations of The Second Kind Open Loop Power control signaling includes the second target power parameter and the second road loss compensation factor.

Step 305, a ue obtain the parameter response message that described 2nd ue sends, and determine the second tunnel Damage.

Step 306, a ue according to described Equations of The Second Kind open Loop Power control signaling and described second path loss, really Fixed second performance number.

Specifically, a ue is according to below equation:

p_{D2d, c}(i)=10log₁₀(m_{D2d, c}(i))+p_{O_d2d, c}+α_{D2d, c}·pl_{D2d, c},

Described first performance number, described second performance number and the 3rd performance number are carried out by step 307, a ue Relatively, determine that minimum power is that a described ue sends the output of data to described base station.

p_{D2d_final, c}(i)=min (p_{Cmax, c}(i), p_{Celluar, c}(i), p_{D2d, c}(i))

Step 308, ue1 are according to output p_{D2d_final, c}(i), the control signaling of transmitting d2d link or number According to or find signal.

It should be noted that between step 304-306 and step 301-303 in no particular order sequentially.

Fig. 4 is the schematic flow sheet of present device communication means four embodiment, as shown in figure 4, this The equipment communication method of bright offer, comprising:

Step 401, a ue, the first kind open Loop Power control signaling that is, ue1 acquisition base station sends, institute State first kind open Loop Power control signaling and include first object power parameter and the first road loss compensation factor ginseng Number.

Step 402, a ue obtain the metrical information that base station sends, and determine the first path loss.

Step 403, a ue are according to described first kind open loop power value control signaling and the described first via Damage, determine the first performance number.

Step 404, a ue obtain the Equations of The Second Kind open Loop Power control signaling that base station sends, described Equations of The Second Kind Open Loop Power control signaling includes the second target power parameter.

Step 405, a ue obtain Equations of The Second Kind close-loop power control signaling.

In the present embodiment, described Equations of The Second Kind close-loop power control signaling includes following any one or its group Close: the first parameter, the second parameter, described first parameter is the close-loop power control of a described ue configuration Adjustment amount, described second parameter be described first ue configuration with device-to-device modulation coding mode (device to device modulation and coding scheme, abbreviation d2d mcs) correlation Amount.For example, mcs determines the debud mode (such as qpsk, 16qam, 64qam) of employing With code check (code check is high, then redundant bit ratio is low).

Step 406, a ue obtain the parameter response message that described 2nd ue sends, and determine the second tunnel Damage.

Step 407, a ue according to described Equations of The Second Kind open Loop Power control signaling, described second path loss and Described Equations of The Second Kind close-loop power control signaling, determines the second performance number.

Specifically, ue1 passes through to measure srs and/or dmrs and/or ack/nack of ue2 transmitting, Estimate the path loss pl of this ue1 and ue2_{D2d, c}.According to pl_{D2d, c}, the transmission bandwidth m of ue1_{D2d, c}(i)、 The mcs grade of ue1 use, Equations of The Second Kind open Loop Power control signaling, Equations of The Second Kind close-loop power control letter Order, calculate that ue1 disclosure satisfy that d2d unicast communication signal intensity requirement in carrier wave c, subframe i the Two performance numbers:

Described first performance number, described second performance number and the 3rd performance number are carried out by step 408, a ue Relatively, determine that minimum power is that a described ue sends the output of data to described base station.

p_{D2d_final, c}(i)=min (p_{Cmax, c}(i), p_{Celluar, c}(i), p_{D2d, c}(i))

Step 409, ue1 are according to output p_{D2d_final, c}(i), the control signaling of transmitting d2d link or number According to or find signal.

It should be noted that between step 404-407 and step 401-403 in no particular order sequentially.

Fig. 5 is the schematic flow sheet of present device communication means five embodiment, as shown in figure 5, this The equipment communication method of bright offer, comprising:

Step 501, a ue, that is, ue1 obtain the first kind open Loop Power control signaling and that base station sends Two class open Loop Power control signalings, in first kind open Loop Power control signaling, comprise target power parameter p_{O_celluar, c}With road loss compensation factor parameter alpha_{Celluar, c}.In Equations of The Second Kind open Loop Power control signaling, comprise Target power parameter p_{O_d2d, c}With road loss compensation factor α_{D2d, c}.

Step 502, base station or the 2nd ue are to a ue, i.e. transmitting terminal ue1 configuration Equations of The Second Kind closed loop work( Rate control signaling；

Step 503, ue1 pass through to measure the side of the crs and/or csi-rs pilot tone of its serving BS transmitting Formula, estimates this ue and serving BS up path loss pl_{Celluar, c}.

Specifically, according to pl_{Celluar, c}, the transmission bandwidth m of ue1_{D2d, c}(i), first kind open loop power control Signaling processed, calculates ue1 and base station is not caused in carrier wave c, subframe i with strongly disturbing power upper limit value, that is, First performance number:

p_{Celluar, c}(i)=10log₁₀(m_{D2d, c}(i))+p_{O_celluar, c}+α_{Celluar, c}·pl_{Celluar, c}

Step 504, ue1 are according to the path loss pl of ue1 and ue2_{D2d, c}, the transmission bandwidth of ue1 m_{D2d, c}I (), Equations of The Second Kind open Loop Power control signaling, Equations of The Second Kind close-loop power control signaling, calculate ue1 The power of d2d unicast communication signal intensity requirement, i.e. the second work(be disclosure satisfy that on carrier wave c, subframe i Rate value:

p_{D2d, c}(i)=10log₁₀(m_{D2d, c}(i))+p_{O_d2d, c}+α_{D2d, c}·pl_{D2d, c}+f_{D2d, c}(i)

Specifically, by measuring srs and/or dmrs and/or ack/nack of ue2 transmitting, estimate Count the path loss pl of this ue1 and ue2_{D2d, c}.

Step 505, ue1 calculate actual emission power in carrier wave c, subframe i for the ue1, i.e. output work Rate value:

p_{D2d_final, c}(i)=min (p_{Cmax, c}(i), p_{Celluar, c}(i), p_{D2d, c}(i))

Wherein, p_{Cmax, c}I () is maximum transmission power on carrier wave c for the ue1.

Step 506, ue1 are according to output power value p_{D2d_final, c}(i), the control letter of transmitting d2d link Order or data or discovery signal.

In the present embodiment, the order of step 502～step 504 can arbitrarily be replaced.

Fig. 6 is the schematic flow sheet of present device communication means six embodiment, as shown in fig. 6, this The equipment communication method of bright offer, comprising:

Step 601, base station are opened by rrc signal deployment first kind open Loop Power control parameter and Equations of The Second Kind Ring power contorl parameters, and send rrc signaling by eating dishes without rice or wine.

In first kind open Loop Power control signaling, comprise target power parameter p_{O_celluar, c}Compensate with path loss Factor parameter α_{Celluar, c}.In Equations of The Second Kind open Loop Power control signaling, comprise target power parameter p_{O_d2d, c} With road loss compensation factor α_{D2d, c}.

Step 602, base station or the 2nd ue, are a ue, i.e. transmitting terminal ue1 configuration Equations of The Second Kind closed loop Power Control signaling；

Step 603, ue1 pass through to measure the side of the crs and/or csi-rs pilot tone of its serving BS transmitting Formula, estimates the up path loss pl of this ue and serving BS_{Celluar, c}.

According to pl_{Celluar, c}, the transmission bandwidth m of ue1_{D2d, c}(i), first kind open Loop Power control signaling, Calculate ue1 and strongly disturbing power upper limit value, i.e. the first power are not caused to base station on carrier wave c, subframe i Value:

Step 604, ue1 are according to the path loss pl of ue1 and ue2_{D2d, c}, ue1 transmission bandwidth corresponding Resource Block quantity m_{D2d, c}The mcs grade of (i), ue1d2d transmission, Equations of The Second Kind open Loop Power control letter Order, calculates the work(that ue1 disclosure satisfy that d2d unicast communication signal intensity requirement in carrier wave c, subframe i Rate, i.e. the second performance number:

p_{D2d, c}(i)=10log₁₀(m_{D2d, c}(i))+p_{O_d2d, c}+α_{D2d, c}·pl_{D2d, c}+δ_{Tf_d2d, c}(i)

Step 605, ue1 calculate actual emission power in carrier wave c, subframe i for the ue1, i.e. output work Rate value:

p_{D2d_final, c}(i)=min (p_{Cmax, c}(i), p_{Celluar, c}(i), p_{D2d, c}(i))

Step 606, ue1 are according to the transmission power level p calculating in step 5_{D2d_final, c}I (), launches d2d The control signaling of link or data or discovery signal.

In the present embodiment, the order of step 602～step 604 can arbitrarily be replaced.

Fig. 7 is the schematic flow sheet of present device communication means seven embodiment, as shown in fig. 7, this The equipment communication method of bright offer, comprising:

Step 701, base station are opened by rrc signal deployment first kind open Loop Power control parameter and Equations of The Second Kind Ring power contorl parameters, and send rrc signaling by eating dishes without rice or wine.

Specifically, in first kind open Loop Power control signaling, comprise target power parameter p_{O_celluar, c}With Road loss compensation factor parameter alpha_{Celluar, c}.In Equations of The Second Kind open Loop Power control signaling, comprise target power ginseng Number p_{O_d2d, c}With road loss compensation factor α_{D2d, c}.

Step 702, base station or the 2nd ue, i.e. receiving terminal ue2, to a ue, i.e. transmitting terminal ue1 Configuration Equations of The Second Kind close-loop power control signaling；

Step 703, ue1 pass through to measure the side of the crs and/or csi-rs pilot tone of its serving BS transmitting Formula, estimates the up path loss pl of this ue and serving BS_{Celluar, c}.

Step 704, ue1 pass through measure ue2 transmitting srs and/or dmrs and/or Ack/nack, estimates the path loss pl of this ue1 and ue2_{D2d, c}.

Specifically, according to pl_{D2d, c}, the transmission bandwidth m of ue1_{D2d, c}(i), Equations of The Second Kind open Loop Power control Signaling, calculates ue1 and disclosure satisfy that d2d unicast communication signal intensity requirement in carrier wave c, subframe i Power, i.e. the second performance number:

p_{D2d, c}(i)=10log₁₀(m_{D2d, c}(i))+p_{O_d2d, c}+α_{D2d, c}·pl_{D2d, c}

Step 705, ue1 calculate actual emission power in carrier wave c, subframe i for the ue1, i.e. output work Rate value:

p_{D2d_final,}(i)=min { p_{Cmax, c}(i), min [p_{Celluar, c}(i), p_{D2d, c}(i)]+δ_{Tf_d2d, c}(i)+f_{D2d, c}(i)}

Wherein, f_{D2d, c}I () is Closed-cycle correction function (can be cumulative revise or absolute revise), its value with Tpc order is relevant, δ_{Tf_d2d, c}I () is determined by the mcs of ue1, p_{Cmax, c}I () is ue1 in carrier wave c On maximum transmission power.

Step 706, ue1 output power value p_{D2d_final, c}(i), the control signaling of transmitting d2d link or data Or discovery signal.

In the present embodiment, the order of step 702～step 704 can arbitrarily be replaced.

Equipment communication method eight embodiment that the present invention provides, basic procedure is as shown in fig. 7, difference is Obtain defeated in the 801-806 of the corresponding the present embodiment of corresponding 701-706, and step 706 and step 806 The computational methods going out performance number are different.The equipment communication method that the present invention provides, comprising:

Step 801: base station is opened by rrc signal deployment first kind open Loop Power control parameter and Equations of The Second Kind Ring power contorl parameters, and send rrc signaling by eating dishes without rice or wine.

Specifically, in first kind open Loop Power control signaling, comprise target power parameter p_{O_celluar, c}With Road loss compensation factor parameter alpha_{Celluar, c}.In Equations of The Second Kind open Loop Power control signaling, comprise target power ginseng Number p_{O_d2d, c}With road loss compensation factor α_{D2d, c}

Step 802: base station or the 2nd ue, i.e. receiving terminal ue2, close to transmitting terminal ue1 configuration Equations of The Second Kind Ring Power Control signaling；

Step 803:ue1 is passed through to measure the side of the crs and/or csi-rs pilot tone of its serving BS transmitting Formula, estimates the up path loss pl of this ue and serving BS_{Celluar, c}.

Step 804, ue1 pass through measure ue2 transmitting srs and/or dmrs and/or Ack/nack, estimates the path loss pl of this ue1 and ue2_{D2d, c}.

Specifically, according to pl_{D2d, c}, the transmission bandwidth m of ue1_{D2d, c}(i), Equations of The Second Kind open Loop Power control Signaling, calculates ue1 and disclosure satisfy that d2d unicast communication signal intensity requirement in carrier wave c, subframe i Power, i.e. the second power:

p_{D2d, c}(i)=10log₁₀(m_{D2d, c}(i))+p_{O_d2d, c}+α_{D2d, c}·pl_{D2d, c}

Step 805, ue1 calculate actual emission power in carrier wave c, subframe i for the ue1, i.e. output work Rate value:

p_{D2d_final, c}(i)=min { p_{Cmax, c}(i), min [p_{Celluar, c}(i), p_{D2d, c}(i)]+δ_{Tf_d2d, c}(i)}

Wherein, δ_{Tf_d2d, c}I () is determined by the mcs of ue1, p_{Cmax, c}(i) be ue1 on carrier wave c Big transmission power.

Step 806, ue1 output power value p_{D2d_final, c}(i), the control signaling of transmitting d2d link or data Or discovery signal.

In the present embodiment, the order of step 802～step 804 can arbitrarily be replaced.

Equipment communication method nine embodiment that the present invention provides, basic procedure is as shown in fig. 7, difference is Obtain defeated in the 901-906 of the corresponding the present embodiment of corresponding 701-706, and step 706 and step 906 The computational methods going out performance number are different.The equipment communication method that the present invention provides, comprising:

Step 901, base station are opened by rrc signal deployment first kind open Loop Power control parameter and Equations of The Second Kind Ring power contorl parameters, and send rrc signaling by eating dishes without rice or wine.

Step 902, base station or the 2nd ue, i.e. receiving terminal ue2, to a ue, i.e. transmitting terminal ue1 Configuration Equations of The Second Kind close-loop power control signaling；

Step 903, ue1 pass through to measure the side of the crs and/or csi-rs pilot tone of its serving BS transmitting Formula, estimates the up path loss pl of this ue and serving BS_{Celluar, c}.

Specifically, according to pl_{Celluar, c}, the transmission bandwidth m of ue1_{D2d, c}(i), first kind open loop power control Signaling processed, calculates ue1 and base station is not caused in carrier wave c, subframe i with strongly disturbing power upper limit value:

Step 904, ue1 pass through measure ue2 transmitting srs and/or dmrs and/or Ack/nack, estimates the path loss pl of this ue1 and ue2_{D2d, c}.

Specifically, according to pl_{D2d, c}, the transmission bandwidth m of ue1_{D2d, c}(i), Equations of The Second Kind open Loop Power control Signaling, calculates ue1 and disclosure satisfy that d2d unicast communication signal intensity requirement in carrier wave c, subframe i Power:

p_{D2d, c}(i)=10log₁₀(m_{D2d, c}(i))+p_{O_d2d, c}+α_{D2d, c}·pl_{D2d, c}

Step 905, ue1 calculate actual emission power in carrier wave c, subframe i for the ue1, i.e. output work Rate value:

p_{D2d_final, c}(i)=min { p_{Cmax, c}(i), min [p_{Celluar, c}(i), p_{D2d, c}(i)]+f_{D2d, c}(i)}

Wherein, f_{D2d, c}I () is Closed-cycle correction function (can be cumulative revise or absolute revise), its value with Tpc order is relevant, p_{Cmax, c}I () is maximum transmission power on carrier wave c for the ue1.

Step 906, ue1 are according to output power value p_{D2d_final, c}(i), transmitting d2d link control signaling or Data or discovery signal.

In the present embodiment, the order of step 902～step 904 can arbitrarily be replaced.

Fig. 8 is the structural representation of present device communicator one embodiment, as shown in figure 8, this sets For to communication apparatus, comprising: the first acquisition module 101, the second acquisition module 102 and determining module 103.Wherein,

First acquisition module 101, for obtaining the first performance number, a described ue sends the maximum of data Calibration power value, described maximum calibration power value includes a described ue and adopts described maximum calibration power When value sends data, the performance number of the described ue that base station receives is less than or equal to base station rrc signaling The first object performance number being configured；

Second acquisition module 102, for obtaining the second performance number, described second performance number includes described first Ue and the 2nd ue carries out the performance number of device-to-device d2d communication；

Determining module 103, for entering described first performance number, described second performance number and the 3rd performance number Row compares, and determines that minimum power is that a described ue sends the output of data to described 2nd ue, Described 3rd performance number includes the maximum transmission power value of a described ue.

In the present embodiment, first user equipment ue obtains the first performance number, and described first performance number includes A described ue sends the maximum calibration power value of data, and described maximum calibration power value includes described the When one ue adopts described maximum calibration power value to send data, the power of the described ue that base station receives The first object performance number that value is configured less than or equal to base station rrc signaling；A described ue obtains second Performance number, described second performance number includes a described ue and the 2nd ue and carries out device-to-device d2d The performance number of communication；A described ue is by described first performance number, described second performance number and the 3rd power Value is compared, and determines that minimum power is that a described ue sends the output work of data to described 2nd ue Rate, described 3rd performance number includes the maximum transmission power value of a described ue.Achieve a ue to 2nd ue sends the determination of the output of data, and then in the case of not affecting d2d communication performance, Ensure the first object work(that a ue is configured not over base station rrc signaling to the jamming power of base station Rate value.

Further, on the basis of above-described embodiment, the first acquisition module 101, specifically for described One ue obtains the first kind open Loop Power control signaling that base station sends, described first kind open Loop Power control letter Order includes following any one or a combination thereof: first object power parameter, the first road loss compensation factor ginseng Number；Obtain the metrical information that base station sends, determine the first path loss, described first path loss includes described first Up path loss between ue and described base station, described metrical information includes following at least one or any group Close: public reference signal crs, channel state information reference signals csi-rs；Opened according to the described first kind Ring Power Control signaling and described first path loss, determine the first performance number.

Further, on the basis of above-described embodiment, described first acquisition module 101, specifically for According to p_{Celluar, c}(i)=10log10 (m_{D2d, c}(i))+p_{O_celluar, c}+α_{Celluar, c}·pl_{Celluar, c}, obtain a described ue Described first performance number p in cellular cell c, subframe i_{Celluar, c}(i), wherein, m_{D2d, c}I () represents honeybee In nest cell c, subframe i, the Resource Block rb number that the transmission of physical channel is used, p_{O_celluar, c}Table Show the first object receiving power of described physical channel on the c of cellular cell, described physical channel includes: Physics wing control channel pscch or physics wing shared channel pssch or physics wing find channel psdch.

Further, on the basis of above-described embodiment, described second acquisition module 102, specifically for Obtain the Equations of The Second Kind open Loop Power control signaling that base station sends, described Equations of The Second Kind open Loop Power control signaling bag Include following any one or a combination thereof: the second target power parameter, the second road loss compensation factor parameter；Obtain The parameter response message taking described 2nd ue to send, determines the second path loss, and described second path loss includes described Carry out the path loss of d2d communication link between first ue and the 2nd ue, described parameter response message include with Under at least any one or a combination thereof: Sounding Reference Signal srs, demodulated reference signal dmrs, really Read symbol ack, negative response nack；According to described Equations of The Second Kind open Loop Power control signaling and described second Path loss, determines the second performance number.

Further, on the basis of above-described embodiment, described second acquisition module 102, specifically for root According to below equation:

p_{D2d, c}(i)=10log₁₀(m_{D2d, c}(i))+p_{O_d2d, c}+α_{D2d, c}·pl_{D2d, c},

Further, on the basis of above-described embodiment, described second acquisition module 102, it is additionally operable to obtain Take Equations of The Second Kind close-loop power control signaling, described Equations of The Second Kind close-loop power control signaling includes following any one Plant or a combination thereof: the first parameter, the second parameter, described first parameter is the closed loop of a described ue configuration Power Control adjustment amount, described second parameter is the related to d2d mcs of a described ue configuration Amount；According to described Equations of The Second Kind open Loop Power control signaling, described second path loss and described Equations of The Second Kind closed loop work( Rate control signaling, determines the second performance number.

Obtain described second performance number p_{D2d, c}(i), wherein, the second target power parameter p_{O_d2d, c}It is on carrier wave c D2d target received power in d2d link, α_{D2d, c}It is the second road loss compensation factor.pl_{D2d, c}It is institute State the path loss estimated value of unicast d2d link between a ue and described 2nd ue, described second parameter δ_{Tf_d2d, c}I () is the amount related to device-to-device modulation coding mode d2d mcs, described first parameter f_{D2d, c}I () is close-loop power control adjustment amount.

Further, on the basis of above-described embodiment, described determining module 103, specifically for by institute State the first performance number and described second performance number is compared, determine that minima is the first output；Root According to described first output and described Equations of The Second Kind close-loop power control signaling, determine the second output； Described second output and the 3rd performance number are compared, determine that minima is output.

Further, on the basis of above-described embodiment, described determining module 103, specifically for by institute State the first output and described first parameter summation, obtain described second output；Or, by institute State the first output and described second parameter summation, obtain described second output；Or, by institute State the first output, described first parameter and described second parameter summation, obtain described second output work Rate.

In the present embodiment it is achieved that a ue sends the determination of the output of data to the 2nd ue, And then it is ensured that a ue will not to the jamming power of base station in the case of not affecting d2d communication performance Exceed the first object performance number that base station rrc signaling is configured.

Although disclosed herein embodiment as above, described content only readily appreciates the present invention And the embodiment adopting, it is not limited to the present invention.Technology people in any art of the present invention Member, without departing from disclosed herein spirit and scope on the premise of, can be in the form implemented and thin Any modification and change are carried out on section, but the scope of patent protection of the present invention, still must be with appended right The scope that claim is defined is defined.

Claims

1. a kind of device-to-device communication means is it is characterised in that include:

2. method according to claim 1 is it is characterised in that described first user equipment ue obtains Take the first performance number, comprising:

3. method according to claim 2 is it is characterised in that a described ue is according to described first Class open Loop Power control signaling and described first path loss, determine the first performance number, comprising:

A described ue is according to p_{Celluar, c}(i)=10log10 (m_{D2d, c}(i))+p_{O_celluar, c}+α_{Celluar, c}·pl_{Celluar, c}, obtain Obtain described first performance number p in cellular cell c, subframe i for the described ue_{Celluae, c}(i), wherein, m_{D2d, c}I () represent cellular cell c, in subframe i, the Resource Block rb number that the transmission of physical channel is used Mesh, p_{O_celluar, c}Represent the first object receiving power of described physical channel on the c of cellular cell, α_{Celluar, c}Represent the first road loss compensation factor of described physical channel on the c of cellular cell, described physical channel Including: physics wing control channel pscch or physics wing shared channel pssch or physics wing are sent out Existing channel psdch.

4. the method according to any one of claim 1-3 is it is characterised in that a described ue obtains Take the second performance number, comprising:

5. method according to claim 4 is it is characterised in that a described ue is according to described second Class open Loop Power control signaling and described second path loss, determine the second performance number, comprising:

A described ue is according to below equation:

p_{D2d, c}(i)=10log₁₀(m_{D2d, c}(i))+p_{O_d2d, c}+α_{D2d, c}·p_{Ld2d, c},

Obtain described second performance number p_{D2d, c}(i), wherein, the second target power parameter p_{O_d2d, c}It is carrier wave c D2d target received power in upper d2d link, α_{D2d, c}It is the second road loss compensation factor, pl_{D2d, c}It is Described second path loss of d2d communication link between a described ue and described 2nd ue.

6. method according to claim 4 is it is characterised in that a described ue acquisition base station is sent out After the Equations of The Second Kind open Loop Power control signaling sent, also include:

7. method according to claim 6 is it is characterised in that a described ue is according to described second Class open Loop Power control signaling, described second path loss and described Equations of The Second Kind close-loop power control signaling, determine Second performance number, comprising:

A described ue is according to below equation:

Obtain described second performance number p_{D2d, c}(i), wherein, the second target power parameter p_{O_d2d, c}It is carrier wave c D2d target received power in upper d2d link, α_{D2d, c}It is the second road loss compensation factor, pl_{D2d, c}It is The path loss estimated value of unicast d2d link between a described ue and described 2nd ue, described second ginseng Number δ_{Tf_d2d, c}I () is the amount related to d2d mcs, described first parameter f_{D2d, c}I () is close-loop power control Adjustment amount.

8. method according to claim 5 is it is characterised in that a described ue is by described first Performance number, described second performance number and the 3rd performance number are compared, and determine that minimum power is described first Ue sends the output of data to described 2nd ue, and described 3rd performance number includes a described ue Maximum transmission power value, comprising:

9. method according to claim 8 is it is characterised in that a described ue is according to described One output and described Equations of The Second Kind close-loop power control signaling, determine the second output, comprising:

10. a kind of device-to-device communicator is it is characterised in that include:

11. devices according to claim 10, it is characterised in that described first acquisition module, have Body is used for a described ue and obtains the first kind open Loop Power control signaling that base station sends, and the described first kind is opened Ring Power Control signaling includes following any one or a combination thereof: first object power parameter, the first path loss Compensating factor parameter；Obtain the metrical information that base station sends, determine the first path loss, described first path loss bag Include the up path loss between a described ue and described base station, described metrical information includes following at least one Plant or combination in any: public reference signal crs, channel state information reference signals csi-rs；According to institute State first kind open Loop Power control signaling and described first path loss, determine the first performance number.

12. devices according to claim 11, it is characterised in that described first acquisition module, have Body is used for according to p_{Celluar, c}(i)=10log10 (n_{D2d, c}(i))+p_{O_celluar, c}+α_{Celluar, c}·pl_{Celluar, c}, obtain described Described first performance number p in cellular cell c, subframe i for first ue_{Celluar, c}(i), wherein, m_d2d,c(i) Represent cellular cell c, in subframe i, the Resource Block rb number that the transmission of physical channel is used, p_{O_celluar, c}Represent the first object receiving power of described physical channel on the c of cellular cell, α_{Celluar, c} Represent the first road loss compensation factor of described physical channel on the c of cellular cell, described physical channel includes: Physics wing control channel pscch or physics wing shared channel pssch or physics wing find channel psdch.

13. devices according to any one of claim 10-12 are it is characterised in that described second obtains Delivery block, specifically for obtaining the Equations of The Second Kind open Loop Power control signaling that base station sends, described Equations of The Second Kind is opened Ring Power Control signaling includes following any one or a combination thereof: the second target power parameter, the second path loss Compensating factor parameter；Obtain the parameter response message that described 2nd ue sends, determine the second path loss, described Second path loss includes carrying out the path loss of d2d communication link, described ginseng between a described ue and the 2nd ue Number response messages include following at least any one or a combination thereof: Sounding Reference Signal srs, demodulation Reference signal dmrs, confirmation character ack, negative response nack；According to described Equations of The Second Kind open loop power control Signaling processed and described second path loss, determine the second performance number.

14. devices according to claim 13, it is characterised in that described second acquisition module, have Body is used for according to below equation:

p_{D2d, c}(i)=10log₁₀(m_{D2d, c}(i))+p_{O_d2d, c}+α_{D2d, c}·pl_{D2d, c},

15. devices according to claim 12, it is characterised in that described second acquisition module, are gone back For obtaining Equations of The Second Kind close-loop power control signaling, described Equations of The Second Kind close-loop power control signaling includes following Any one or a combination thereof: the first parameter, the second parameter, described first parameter is a described ue configuration Close-loop power control adjustment amount, described second parameter be described first ue configuration with device-to-device adjust The related amount of coded system d2d mcs processed；According to described Equations of The Second Kind open Loop Power control signaling, described Second path loss and described Equations of The Second Kind close-loop power control signaling, determine the second performance number.

16. devices according to claim 15, it is characterised in that described second acquisition module, have Body is used for according to below equation:

p_{D2d, c}(i)=10log₁₀(m_{D2d, c}(i))+p_{O_d2d, c}+α_{D2d, c}·pl_{D2d, c}+δ_{Tf_d2d, c}(i)+f_{D2d, c}(i)；

17. devices according to claim 14, it is characterised in that described determining module, are specifically used In being compared described first performance number and described second performance number, determine that minima is the first output work Rate；According to described first output and described Equations of The Second Kind close-loop power control signaling, determine the second output Power；Described second output and the 3rd performance number are compared, determine that minima is output work Rate.

18. devices according to claim 17, it is characterised in that described determining module, are specifically used In by described first output and described first parameter summation, obtain described second output；Or Person, described first output and described second parameter summation obtain described second output；Or Person, described first output, described first parameter and described second parameter summation obtain described the Two outputs.