CN105284164B

CN105284164B - A kind of communication means and equipment

Info

Publication number: CN105284164B
Application number: CN201480030209.0A
Authority: CN
Inventors: 刘德平; 柯柏安; 李强
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2014-05-08
Filing date: 2014-05-08
Publication date: 2019-09-20
Anticipated expiration: 2034-05-08
Also published as: CN105284164A; WO2015168917A1

Abstract

The embodiment of the present invention provides a kind of communication means and equipment, and the first user terminal of device-to-device D2D communication obtains uplink transmission power parameter in the embodiment of the present invention；First user terminal is estimated according to the uplink transmission power parameter and downlink path loss, determines the transmission power of D2D communication；And first user terminal emits D2D data according to the transmission power that the D2D is communicated.It can reduce band internal leakage adverse effect caused by uplink communication through the embodiment of the present invention.

Description

A kind of communication means and equipment

Technical field

The present invention relates to wireless communication technology field more particularly to a kind of communication means and equipment.

Background technique

In traditional long term evolution (Long Term Evolution, LTE) communication technology, user terminal (user Equipment, UE) between the signaling that is communicated and data require by the evolved base station (evolved belonging to respectively Node B, eNB) it interacts.

Device-to-device (Device to Device, D2D) is used as a kind of direct communication technology, and the communication data between UE is not It needs to be forwarded by eNB, communication interaction can be directly carried out between UE or is directly carried out under the booster action of network Communication interaction.

LTE-D2D is third generation partner program (3rd Generation partnership project, 3GPP) The technology of direct communication between the UE based on LTE of latest definition, the LTE-D2D communication technology are increased in existing LTE system D2D application, i.e. D2D communication and LTE communication can coexist, as shown in Figure 1, UE1 can emit D2D communication data to UE2 and UE3 D2D communication is carried out, UE1 can also be communicated between eNB.Wherein, UE1 emits communication data, eNB receives the mistake of communication data Journey is known as uplink communication；The process that eNB transmitting communication data, UE1 receive communication data is known as downlink communication；UE1 is as data Launch party, the communication between UE and UE carried out with UE2 and UE3 are that D2D is communicated.

Currently, carry out D2D communication UE generally with maximum power transmission D2D data, however with eNB carry out uplink communication When, the uplink transmission power for each UE that eNB can generally be communicated according to distance and channel situation appropriate adjustment with eNB makes Reception power up to the uplink signal of each UE of eNB compares balance.The generally uplink transmission power meeting of the closer UE of distance eNB The uplink transmission power of UE farther away less than distance eNB.If the UE of D2D communication is carried out with maximum power transmission signal, and When the UE distance eNB for carrying out D2D communication is closer, it is possible that following situation: the carry out D2D communication that eNB is received The reception power for the signal that UE is emitted is higher than the reception power for the uplink signal that the UE that other carry out uplink communication is emitted, this When can occur band internal leakage (In Band Emission, IBE).Refer to the energy leakage for receiving the higher signal of power with internal leakage On to frequency domain in the adjacent lower signal of reception energy, it will affect the UE's that uplink communication is carried out in LTE system with internal leakage Signal normally receives, and causes adverse effect to the uplink communication between UE and eNB.

Summary of the invention

The embodiment of the present invention provides a kind of communication means and equipment, bad caused by uplink communication to reduce band internal leakage It influences.

In a first aspect, providing a kind of communication equipment, including transceiver, processor, memory and bus, wherein transceiver, Processor, memory are connect with bus, wherein

The memory, the program code executed for storing the processor；

The processor obtains uplink transmission power parameter, and according to institute for calling the program of the memory storage Uplink transmission power parameter and downlink path loss estimation are stated, determines the transmission power of D2D communication；And the control transceiver Emit D2D data according to the transmission power of D2D communication；

The transmission power of the transceiver, the D2D communication for being determined according to the processor emits D2D data.

With reference to first aspect, in the first implementation, the processor is specifically used for determining that D2D is logical as follows The transmission power of letter:

According to the uplink transmission power parameter, the D2D transmitted bandwidth communicated and downlink path loss estimation, determine Uplink transmission power, and the transmission power that D2D is communicated is determined according to the uplink transmission power；Or

The modulation format of the transmitted bandwidth, D2D communication that are communicated according to the uplink transmission power parameter, D2D and lower walking along the street Diameter loss estimation, determines uplink transmission power, and the transmission power of D2D communication is determined according to the uplink transmission power.

The first implementation with reference to first aspect, in the second implementation, the processor are specifically used for pressing As under type according to the uplink transmission power determine D2D communicate transmission power: by the uplink transmission power, be determined as institute State the transmission power of D2D communication.

The first implementation with reference to first aspect, in the third implementation, the processor is specifically used for pressing As under type according to the uplink transmission power determine D2D communicate transmission power: determine belonging to the uplink transmission power Power grade；And

According to the first corresponding relationship, the transmission power of the D2D communication is determined, wherein first corresponding relationship is function The corresponding relationship between transmission power that rate grade is communicated with D2D.

The third implementation with reference to first aspect, in the 4th kind of implementation, the processor is specifically used for pressing Power grade belonging to the uplink transmission power as described in determining under type: determining the modulation format that D2D is communicated, and determines uplink hair Penetrate power power grade affiliated under the modulation format of the correspondence D2D communication；And

According to the uplink transmission power, the D2D communicate modulation format and each modulation format under power grade with Corresponding relationship between the transmission power of D2D communication, determines the transmission power of D2D communication.

With reference to first aspect, in the 5th kind of implementation, the processor is also used to: obtaining power bias amount；

The processor is specifically used for determining the transmission power of the D2D communication as follows:

Transmitted bandwidth, downlink path loss estimation and the function communicated according to the uplink transmission power parameter, D2D Rate amount of bias determines the transmission power of D2D communication；Or

Transmitted bandwidth, the modulation format of D2D communication, downlink path communicated according to the uplink transmission power parameter, D2D Loss estimation and the power bias amount, determine the transmission power of D2D communication.

With reference to first aspect, in the 6th kind of implementation, the processor be specifically used for as follows determine described in The transmission power of D2D communication:

According to the uplink transmission power parameter, according to the uplink transmission power parameter and D2D transmission power parameter Corresponding relationship determines the corresponding D2D transmission power parameter of the uplink transmission power parameter, and according to determining D2D transmission power Parameter, the transmitted bandwidth of D2D communication and downlink path loss estimation, determine the transmission power of D2D communication；Or

According to the uplink transmission power parameter, according to the uplink transmission power parameter and D2D transmission power parameter Corresponding relationship determines the corresponding D2D transmission power parameter of the uplink transmission power parameter, and emits according to determining D2D Power parameter, the transmitted bandwidth of D2D communication, the modulation format of D2D communication and downlink path loss estimation, determine D2D communication Transmission power.

Any of the above-described kind of implementation with reference to first aspect, in the 7th kind of implementation, the processor is also used In:

According to the transmission power that the D2D is communicated, the number of transmissions or number of retransmissions are determined；

The transceiver is specifically used for emitting D2D data as follows:

The transmission power of the number of transmissions determined according to the processor and D2D communication, emits D2D data； Or

According to the transmission power that the determining number of retransmissions and the D2D are communicated, emit D2D data.

The 7th kind of implementation with reference to first aspect, in the 8th kind of implementation, the processor is specifically used for pressing As under type determines the number of transmissions or number of retransmissions:

According to the second corresponding relationship, determine that the number of transmissions or number of retransmissions, second corresponding relationship are the hair of D2D communication Penetrate the corresponding relationship between power and the number of transmissions, or the corresponding pass between the transmission power and number of retransmissions of D2D communication System.

8th kind of implementation of the 7th kind of implementation or first aspect with reference to first aspect, in the 9th kind of reality In existing mode, the transceiver is also used to:

Emit the number of transmissions information, the number of transmissions information is for second user terminal according to the number of transmissions information Data are received, the second user terminal is that the terminal of D2D communication is carried out with first user terminal；Or

Emit number of retransmissions information, the number of retransmissions information is for second user terminal according to the number of retransmissions information Data are received, the second user terminal is that the terminal of D2D communication is carried out with first user terminal.

Second aspect provides a kind of communication equipment, which includes transceiver, processor, memory and bus, In, transceiver, processor, memory are connect with bus, wherein

The memory, the program code executed for storing the processor；

The processor calls the program of the memory storage, for determining uplink transmission power parameter；

The transceiver, for issuing the uplink transmission power parameter, the uplink transmission power parameter is used for equipment The first user terminal communicated to equipment D2D determines that D2D is communicated according to downlink path loss and the uplink transmission power parameter Transmission power.

In conjunction with second aspect, in the first implementation, the processor is also used to: determining power bias amount；

The transceiver, is also used to: issuing the power bias amount；

Wherein, the power bias amount is for first user terminal according to the power bias amount, the lower walking along the street Diameter loss estimation and the uplink transmission power parameter, determine the transmission power of D2D communication.

In conjunction with the first of second aspect or second aspect implementation, in the second implementation, the processing Device is also used to: determining the transmitted bandwidth of D2D communication；

The transceiver, is also used to: issuing the transmitted bandwidth of the D2D communication；

Wherein, the transmitted bandwidth of the D2D communication is used for the transmitting band that first user terminal is communicated according to the D2D Wide, the described downlink path loss estimation and the uplink transmission power parameter, determine uplink transmission power.

In conjunction with any of the above-described kind of implementation of second aspect, in the third implementation, the processor is also used In: determine the modulation format of D2D communication；

The transceiver, is also used to: issuing the modulation format of the D2D communication；

Wherein, the modulation format of the D2D communication is used for the modulation lattice that first user terminal is communicated according to the D2D Formula, downlink path loss estimation and the uplink transmission power parameter, determine uplink transmission power.

The third aspect provides a kind of user terminal, which includes: receiving unit, determination unit and transmitting unit, Wherein,

The determination unit for obtaining the uplink transmission power parameter of network equipment transmitting, and is damaged according to downlink path Consumption estimation and the received uplink transmission power parameter of the receiving unit, determine the transmission power of D2D communication；

The transmitting unit, the transmission power of the D2D communication for being determined according to the determination unit, emits D2D Data.

In conjunction with the third aspect, in the first implementation, the determination unit is specifically used for determining D2D as follows The transmission power of communication:

In conjunction with the first implementation of the third aspect, in the second implementation, the determination unit is specifically used for The transmission power of D2D communication is determined according to the uplink transmission power as follows: the uplink transmission power is determined as The transmission power of the D2D communication.

In conjunction with the first implementation of the third aspect, in the third implementation, the determination unit is specifically used for The transmission power of D2D communication is determined according to the uplink transmission power as follows: being determined belonging to the uplink transmission power Power grade；And

According to the first corresponding relationship, the transmission power of the D2D communication is determined, first corresponding relationship is power grade The corresponding relationship between transmission power communicated with D2D.

In conjunction with the third implementation of the third aspect, in the 4th kind of implementation, the determination unit is specifically used for Power grade belonging to the uplink transmission power is determined as follows: according to the uplink transmission power, being determined on described Row transmission power power grade affiliated under each modulation format of the correspondence D2D communication；And

The determination unit is specifically used for determining the transmission power of the D2D communication as follows: according to the uplink Transmission power, D2D communication modulation format and each modulation format under the transmission power that is communicated with D2D of power grade it Between corresponding relationship, determine D2D communication transmission power.

In conjunction with the third aspect, in the 5th kind of implementation, the determination unit is also used to: obtaining power bias amount；

The determination unit is specifically used for determining the transmission power of the D2D communication as follows:

In conjunction with the third aspect, in the 6th kind of implementation, the determination unit is specifically used for determining institute as follows State the transmission power of D2D communication:

According to the uplink transmission power parameter, D2D transmission power parameter, and foundation are determined according to preset corresponding relationship The transmitted bandwidth of determining D2D transmission power parameter, D2D communication and downlink path loss estimation, determine the transmitting function of D2D communication Rate；Or

According to the uplink transmission power parameter, D2D transmission power parameter, and foundation are determined according to preset corresponding relationship The determining transmitted bandwidth of D2D transmission power parameter, D2D communication, the modulation format of D2D communication and downlink path loss estimation, Determine the transmission power of D2D communication.

In conjunction with any of the above-described kind of implementation of the third aspect, in the 7th kind of implementation, the determination unit is also used In: the transmission power communicated according to the D2D determines the number of transmissions or number of retransmissions；

The transmitting unit is specifically used for emitting D2D data as follows: according to the determining the number of transmissions and institute The transmission power of D2D communication is stated, D2D data are emitted；Or the transmitting communicated according to the determining number of retransmissions and the D2D Power emits D2D data.

In conjunction with the 7th kind of implementation of the third aspect, in the 8th kind of implementation, the determination unit is specifically used for The number of transmissions or number of retransmissions are determined as follows:

In conjunction with the 7th kind of implementation of the third aspect or the 8th kind of implementation of the third aspect, in the 9th kind of reality In existing mode, the transmitting unit is also used to:

Fourth aspect provides a kind of network equipment, which includes determination unit and issuance unit, wherein

The determination unit, for determining uplink transmission power parameter；

The issuing unit, the uplink transmission power parameter determined for issuing the determination unit, the uplink First user terminal of the transmission power parameter for device-to-device D2D communication emits according to downlink path loss and the uplink Power parameter determines the transmission power of D2D communication.

In conjunction with fourth aspect, in the first implementation, the determination unit is also used to: determining power bias amount；

The issuing unit is also used to: issuing the power bias amount；

Wherein, the power bias amount is for first user terminal according to the power bias amount, the lower walking along the street Diameter loss estimation and the uplink transmission power parameter determine the transmission power of the D2D communication.

In conjunction with the first of fourth aspect or fourth aspect implementation, in the second implementation, the determination Unit is also used to: determining the transmitted bandwidth of D2D communication；

The issuing unit is also used to: issuing the transmitted bandwidth of the D2D communication；

In conjunction with any of the above-described kind of implementation of fourth aspect, in the third implementation, the determination unit is also used In: determine the modulation format of D2D communication；

The issuing unit is also used to: issuing the modulation format of the D2D communication；

5th aspect, provides a kind of communication means, comprising:

First user terminal of device-to-device D2D communication obtains the uplink transmission power parameter of network equipment transmitting；

First user terminal is estimated according to the uplink transmission power parameter and downlink path loss, determines that D2D is logical The transmission power of letter；And

First user terminal emits D2D data according to the transmission power that the D2D is communicated.

In conjunction with the 5th aspect, in the first implementation, the first user terminal is according to the uplink transmission power parameter Estimate with the downlink path loss, determine the transmission power of D2D communication, comprising:

First user terminal is according to the uplink transmission power parameter, the D2D transmitted bandwidth communicated and the downlink Path loss estimation determines uplink transmission power, and the transmission power of D2D communication is determined according to the uplink transmission power；Or Person

First user terminal is communicated according to the uplink transmission power parameter, the transmitted bandwidth of D2D communication, D2D Modulation format and downlink path loss estimation determine uplink transmission power, and determine that D2D is communicated according to the uplink transmission power Transmission power.

It is in the second implementation, described to emit according to the uplink in conjunction with the first implementation of the 5th aspect Power determines the transmission power of D2D communication, comprising:

The uplink transmission power is determined as the transmission power of the D2D communication by first user terminal.

It is described to emit according to the uplink in the third implementation in conjunction with the first implementation of the 5th aspect Power determines the transmission power of D2D communication, comprising:

First user terminal determines power grade belonging to the uplink transmission power；And

First user terminal determines the transmission power of the D2D communication according to the first corresponding relationship, described first pair The corresponding relationship that should be related between the transmission power communicated for power grade with D2D.

In conjunction with the third implementation of the 5th aspect, in the 4th kind of implementation,

First user terminal determines power grade belonging to the uplink transmission power, comprising:

First user terminal determines the modulation format of D2D communication；

The modulation of transmitted bandwidth, D2D communication that first user terminal is communicated according to uplink transmission power parameter, D2D Format and downlink path loss estimation, determine uplink transmission power, and determine that the uplink transmission power is logical in the correspondence D2D Power grade belonging under the modulation format of letter；

First user terminal determines the transmission power of D2D communication according to the first corresponding relationship, comprising:

First user terminal modulates lattice according to the uplink transmission power, the D2D modulation format communicated and respectively The corresponding relationship between transmission power that power grade under formula is communicated with D2D determines the transmission power of D2D communication.

In conjunction with the 5th aspect, in the 5th kind of implementation, this method further include:

First user terminal obtains power bias amount；

First user terminal is estimated according to the uplink transmission power parameter and the downlink path loss, determines The transmission power of D2D communication, comprising:

First user terminal is according to the uplink transmission power parameter, the transmitted bandwidth of D2D communication, downlink path damage Consumption estimation and the power bias amount, determine the transmission power of D2D communication；Or

First user terminal is communicated according to the uplink transmission power parameter, the transmitted bandwidth of D2D communication, D2D Modulation format, downlink path loss estimation and the power bias amount, determine the transmission power of D2D communication.

In conjunction with the 5th aspect, in the 6th kind of implementation, the first user terminal is according to the uplink transmission power parameter Estimate with the downlink path loss, determine the transmission power of D2D communication, comprising:

First user terminal determines that D2D is sent out according to the uplink transmission power parameter, according to preset corresponding relationship Power parameter is penetrated, and according to determining D2D transmission power parameter, the D2D transmitted bandwidth communicated and downlink path loss estimation, really Determine the transmission power of D2D communication；Or

First user terminal determines that D2D is sent out according to the uplink transmission power parameter, according to preset corresponding relationship The modulation format of the transmitted bandwidth, D2D communication penetrating power parameter, and communicate according to determining D2D transmission power parameter, D2D and Downlink path loss estimation, determines the transmission power of D2D communication.

In conjunction with any of the above-described kind of implementation of the 5th aspect, in the 7th kind of implementation, first user terminal After the transmission power for determining D2D communication, this method further include:

The transmission power that first user terminal is communicated according to the D2D, determines the number of transmissions or number of retransmissions；

First user terminal emits data according to the transmission power that the determining D2D is communicated, comprising:

The transmission power that first user terminal is communicated according to the determining the number of transmissions and the D2D, emits D2D Data；Or

The transmission power that first user terminal is communicated according to the determining number of retransmissions and the D2D, emits D2D Data.

In conjunction with the 5th aspect the 7th kind of implementation, in the 8th kind of implementation, first user terminal according to The transmission power of the D2D communication, determines the number of transmissions or number of retransmissions, comprising:

First user terminal determines the number of transmissions or number of retransmissions according to the second corresponding relationship, and described second is corresponding Relationship is the corresponding relationship between the transmission power and the number of transmissions of D2D communication, or transmission power and re-transmission for D2D communication Corresponding relationship between number.

In conjunction with the 7th kind of implementation of the 5th aspect or the 8th kind of implementation of the 5th aspect, realized at the 9th kind In mode, after first user terminal determines the number of transmissions or number of retransmissions, this method further include:

First user terminal emits the number of transmissions information, the number of transmissions information for second user terminal according to The number of transmissions information receives data, and the second user terminal is that the end of D2D communication is carried out with first user terminal End；Or

First user terminal emits number of retransmissions information, the number of retransmissions information for second user terminal according to The number of retransmissions information receives data, and the second user terminal is that the end of D2D communication is carried out with first user terminal End.

6th aspect, provides a kind of communication means, comprising:

The network equipment determines uplink transmission power parameter；

The network equipment issues the uplink transmission power parameter, and the uplink transmission power parameter is used for device-to-device First user terminal of D2D communication determines D2D communication according to downlink path loss estimation and the uplink transmission power parameter Transmission power.

In conjunction with the 6th aspect, in the first implementation, this method further include:

The network equipment is determining and issues power bias amount；

The power bias amount is for first user terminal according to the power bias amount, the downlink path loss Estimation and the uplink transmission power parameter determine the transmission power of D2D communication.

In conjunction with the first implementation of the 6th aspect or the 6th aspect, in the second implementation, this method is also Include:

The network equipment is determining and issues the transmitted bandwidth of D2D communication；

The transmitted bandwidth of the D2D communication is used for transmitted bandwidth, the institute that first user terminal is communicated according to the D2D Downlink path loss estimation and the uplink transmission power parameter are stated, determines uplink transmission power.

In conjunction with any of the above-described kind of implementation of the 6th aspect, in the third implementation, this method further include:

The network equipment is determining and issues the modulation format of D2D communication；

The modulation format of the D2D communication is used for modulation format, the institute that first user terminal is communicated according to the D2D Downlink path loss estimation and the uplink transmission power parameter are stated, determines uplink transmission power.

7th aspect, provides a kind of communication system, which includes the network equipment and user terminal, and the network is set The standby network equipment provided for any implementation of fourth aspect, the user terminal are any implementation of the third aspect The user terminal of offer.

First UE of communication means provided in an embodiment of the present invention and equipment, D2D communication estimates according to downlink path loss With the uplink transmission power parameter received, the transmission power for carrying out D2D communication, i.e. middle D2D communication compared with the prior art are determined The first UE D2D data are emitted with maximum transmission power, the transmission power of D2D of embodiment of the present invention communication is using downlink path Loss estimation is determined, so that reaching the network equipment after the decline of the D2D signal experience channel of the first UE of D2D communication It receives power and is not above the reception power that the first UE carries out the uplink signal arrival network equipment of uplink communication, it is ensured that The uplink signal for receiving power and other UE that the D2D signal of first UE of D2D communication reaches the network equipment reaches the network equipment Reception power it is suitable, can reduce or avoid band internal leakage interfere, will not influence the reception of the uplink signal of other UE, into And influence of the D2D communication to uplink communication can be reduced.

Detailed description of the invention

Fig. 1 is D2D communication system communication process schematic；

Fig. 2 is that the communication equipment that the embodiment of the present invention one provides constitutes schematic diagram；

Fig. 3 is that communication equipment provided by Embodiment 2 of the present invention constitutes schematic diagram；

Fig. 4 is that the user terminal that the embodiment of the present invention three provides constitutes schematic diagram；

Fig. 5 is that the network equipment that the embodiment of the present invention four provides constitutes schematic diagram；

Fig. 6 is that the communication system that the embodiment of the present invention five provides constitutes schematic diagram；

Fig. 7 A- Fig. 7 E is the communication means flow chart that the embodiment of the present invention six provides；

Fig. 8 is the communication means flow chart that the embodiment of the present invention seven provides；

Fig. 9 is the communication means flow chart that the embodiment of the present invention eight provides；

Figure 10 is the communication means flow chart that the embodiment of the present invention nine provides.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts Example, shall fall within the protection scope of the present invention.

In the D2D communication technology, the D2D communication technology be can be applied to for communication means provided in an embodiment of the present invention and equipment application In each communication scenes, such as LTE, 2G or 3G etc..The process schematic for carrying out D2D communication sees Fig. 1, UE1 and the network equipment It is communicated, the process that UE1 transmitting communication data, the network equipment receive communication data is known as uplink communication, network equipment transmitting The process that communication data, UE1 receive communication data is known as downlink communication.The network equipment carries out uplink when uplink communication to UE1 Transmission power carries out power control, and target is that the reception power of the uplink signal for the UE1 for receiving the network equipment and network are set The reception power of the uplink signal of standby other UE received is suitable.The uplink transmission power being related to below the embodiment of the present invention is Refer to UE to the transmission power between the network equipment.UE1 is logical between the UE and UE carried out with UE2 and UE3 as data emission Letter is that D2D is communicated, and UE1 adjusts the transmission power of D2D communication, the transmission power tune of UE1 adjustment D2D communication in the embodiment of the present invention When control, uplink transmission power when uplink communication is carried out according to UE1 and LA Management Room, determines the transmission power of D2D communication, and Emit D2D data according to determining D2D communication transmission power.Due to the transmission power of the D2D communication of UE1 in the embodiment of the present invention It is to be determined according to the uplink transmission power of UE1 to the network equipment, UE1 is made to carry out the transmitting signal and other UE of D2D communication Reception power of the uplink signal when reaching the network equipment is suitable, for letting out in the band of the uplink communication of other UE and the network equipment Leakage reduces as far as possible, improves system performance.

It should be noted that the network equipment in the embodiment of the present invention is either evolved base station in LTE system (eNB), be also possible to Universal Mobile Communication System (Universal Mobile Telecommunications System, UMTS the base station (NB) in) can also be that other are communicated with UE and are the network equipment etc. that UE carries out scheduling of resource, this hair It is illustrated so that the network equipment is the eNB in LTE system as an example below bright embodiment.

The present invention, to communication means provided in an embodiment of the present invention and equipment, carries out detailed below with reference to specific embodiment Explanation.

In the embodiment of the present invention, by D2D communicate in emit the UE of D2D data and be known as the first UE, the first UE is to carrying out D2D The transmission power of communication is regulated and controled, by D2D communicate in receive the UE of D2D data of the first UE transmitting and be known as the 2nd UE.

Embodiment one

The embodiment of the present invention one provides a kind of communication equipment 100, which, which fills 100, can execute subsequent embodiment six to reality The method and step for applying example nine is illustrated in figure 2 a kind of composition schematic diagram of communication equipment provided in an embodiment of the present invention, Fig. 2 institute Show, which includes transceiver 11, processor 12, memory 13 and bus 14, wherein transceiver 11, is deposited processor 12 Reservoir 13 is connect with bus 14, wherein

Memory 13, the program code executed for storage processor 12；

Processor 12, the program for calling memory 13 to store, obtains uplink transmission power parameter, and according to the uplink Transmission power parameter and downlink path loss estimation, determine the transmission power of D2D communication；And control transceiver 11 is according to D2D The transmission power of communication emits D2D data；

Transceiver 11, for receiving the uplink transmission power parameter of network equipment transmitting, and determined according to processor 12 The transmission power of D2D communication emits D2D data.

Wherein, uplink transmission power parameter can be what transceiver 11 received, and processor 12 can be from transceiver 11 Obtain the uplink transmission power parameter；Alternatively, processor 12, which can also be from memory 13, obtains the uplink transmission power parameter, Memory 13 stores the uplink transmission power parameter that transceiver 11 is previously received.

In conjunction with above-described embodiment one, in the first implementation, processor 12 determines D2D communication as follows Transmission power:

According to uplink transmission power parameter, the D2D transmitted bandwidth communicated and downlink path loss estimation, determine that uplink emits Power, and the transmission power that D2D is communicated is determined according to uplink transmission power；Or

The modulation format and downlink path damage of the transmitted bandwidth, D2D communication that are communicated according to uplink transmission power parameter, D2D Consumption estimation determines uplink transmission power, and the transmission power of D2D communication is determined according to uplink transmission power.

In conjunction with the first implementation of above-described embodiment one, in the second implementation, processor 12 is specifically used for The transmission power of D2D communication is determined according to the uplink transmission power as follows: logical as D2D by uplink transmission power The transmission power of letter.

In conjunction with the first implementation of above-described embodiment one, in the third implementation, processor 12 is specifically used for The transmission power of D2D communication is determined according to the uplink transmission power as follows: determining function belonging to uplink transmission power Rate grade；And

According to the first corresponding relationship, determine the transmission power of D2D communication, wherein the first corresponding relationship be power grade with Corresponding relationship between the transmission power of D2D communication.

It should be noted that first corresponding relationship is stored in memory 13, it can be and be pre-configured with user end End can also be stored into memory 13 after receiving in the network equipment with transceiver 11.The corresponding relationship being previously mentioned hereinafter It is herewith similar, it repeats no more.

In conjunction with the third implementation of above-described embodiment one, in the 4th kind of implementation, processor 12 is specifically used for Power grade belonging to the uplink transmission power is determined as follows: being determined the modulation format of D2D communication, and is determined uplink Transmission power power grade affiliated under the modulation format of corresponding D2D communication；And

Power grade under the modulation format and each modulation format that communicate according to uplink transmission power, D2D is communicated with D2D Transmission power between corresponding relationship, determine D2D communication transmission power.

In conjunction with above-described embodiment one, in the 5th kind of implementation, transceiver 11 is also used to: obtaining power bias amount；

Processor 12, specifically for determining the transmission power of the D2D communication as follows:

Transmitted bandwidth, downlink path loss estimation and the power bias communicated according to uplink transmission power parameter, D2D Amount determines the transmission power of D2D communication；Or

Modulation format, the downlink path loss of the transmitted bandwidth, D2D communication that are communicated according to uplink transmission power parameter, D2D Estimation and power bias amount determine the transmission power of D2D communication.

In conjunction with above-described embodiment one, in the 6th kind of implementation, processor 12 is specifically used for determining institute as follows State the transmission power of D2D communication:

According to uplink transmission power parameter, D2D transmission power parameter is determined according to preset corresponding relationship, and according to determination D2D transmission power parameter, D2D communication transmitted bandwidth and downlink path loss estimation, determine D2D communication transmission power； Or

According to uplink transmission power parameter, D2D transmission power parameter is determined according to preset corresponding relationship, and according to determination D2D transmission power parameter, D2D communication transmitted bandwidth, D2D communication modulation format and downlink path loss estimation, determine The transmission power of D2D communication.

In conjunction with any of the above-described kind of implementation of above-described embodiment one, in the 7th kind of implementation, processor 12 is also used In:

According to the transmission power that D2D is communicated, the number of transmissions or number of retransmissions are determined；

Transceiver 11 is specifically used for emitting D2D data as follows:

According to the transmission power that determining the number of transmissions and D2D are communicated, emit D2D data；Or

According to the transmission power that determining number of retransmissions and D2D are communicated, emit D2D data.

In conjunction with the 7th kind of implementation of above-described embodiment one, in the 8th kind of implementation, processor 12 is specifically used for The number of transmissions or number of retransmissions are determined as follows:

According to the second corresponding relationship, determine that the number of transmissions or number of retransmissions, the second corresponding relationship are the transmitting function of D2D communication Corresponding relationship between rate and the number of transmissions, or the corresponding relationship between the transmission power and number of retransmissions of D2D communication.

In conjunction with the 7th kind of implementation of above-described embodiment one or the 8th kind of implementation of above-described embodiment one, In 9th kind of implementation, transceiver 11 is also used to:

Emit the number of transmissions information, the number of transmissions information receives number according to the number of transmissions information for second user terminal According to second user terminal is to carry out the terminal of D2D communication with the first user terminal；Or

Emit number of retransmissions information, number of retransmissions information receives number according to the number of retransmissions information for second user terminal According to second user terminal is to carry out the terminal of D2D communication with the first user terminal.

In conjunction with the 9th kind of implementation of above-described embodiment one, in the tenth kind of implementation, transceiver 11 is used for:

In dispatch notice, emit the number of transmissions information or number of retransmissions information.

When the transmission power that the above-mentioned communication equipment of the embodiment of the present invention carries out D2D communication determines, according to downlink path loss The uplink transmission power parameter estimated and received determines the transmission power for carrying out D2D communication, i.e., middle D2D compared with the prior art First UE of communication emits D2D data with maximum transmission power, and the transmission power of D2D of embodiment of the present invention communication is using downlink Path loss estimation is determined, so that reaching the network equipment after the decline of the D2D signal experience channel of the UE of D2D communication It receives power and is not above the reception power that the UE carries out the uplink signal arrival network equipment of uplink communication, it is ensured that D2D The D2D signal of the UE of communication reaches the reception function for receiving power and the uplink signal arrival network equipment of other UE of the network equipment Rate is suitable, can reduce or avoids band internal leakage to interfere, will not influence the reception of the uplink signal of other UE, and then can drop Low D2D communicates the influence to uplink communication.

Embodiment two

Second embodiment of the present invention provides a kind of communication equipment 200, which relates to for executing subsequent embodiment nine And method flow, Fig. 3 show communication equipment 200 provided by Embodiment 2 of the present invention and constitutes schematic diagram, as shown in figure 3, should Communication equipment 200 includes transceiver 21, processor 22, memory 23 and bus 24, wherein transceiver 21, processor 22, storage Device 23 is connect with bus 24, wherein

Memory 23, the program code executed for storage processor 22；

Processor 22, the program for calling memory 23 to store, for determining uplink transmission power parameter；

Transceiver 21, the uplink transmission power parameter determined for issuing processor 22, uplink transmission power parameter are used for First user terminal of device-to-device D2D communication determines that D2D is communicated according to downlink path loss and uplink transmission power parameter Transmission power.

In conjunction with above-described embodiment two, in the first implementation, processor 22 is also used to: determining power bias amount；

Transceiver 21, is also used to: issuing power bias amount；

Wherein, power bias amount is for the first user terminal according to power bias amount, downlink path loss estimation and uplink Transmission power parameter determines the transmission power of D2D communication.

In conjunction with above-described embodiment two, or the first implementation of above-described embodiment two is combined, second of realization side In formula, processor 22 is also used to: determining the transmitted bandwidth of D2D communication；

Transceiver 21, is also used to: issuing the transmitted bandwidth of D2D communication；

Wherein, the transmitted bandwidth of D2D communication is used for transmitted bandwidth, the downlink path that the first user terminal is communicated according to D2D Loss estimation and uplink transmission power parameter, determine uplink transmission power.

Two any of the above-described kind of implementation in conjunction with the embodiments, in the third implementation, processor 22 is also used to: Determine the modulation format of D2D communication；

Transceiver 21, is also used to: issuing the modulation format of D2D communication；

Wherein, the modulation format of D2D communication is used for modulation format, the downlink path that the first user terminal is communicated according to D2D Loss estimation and uplink transmission power parameter, determine uplink transmission power.

In conjunction with the first implementation of above-described embodiment two, in the 4th kind of implementation, transceiver 21 is using broadcast At least one of mode, radio resource control RRC signaling mode and physical layer signaling control mode mode, issues power Amount of bias.

The above-mentioned communication equipment of the embodiment of the present invention issues the transmitting that uplink transmission power parameter, power bias amount, D2D are communicated Bandwidth or the modulation format etc. of D2D communication carry out, when the UE for allowing to carry out D2D communication carries out the transmission power of D2D communication and determines, The uplink transmission power parameter estimated and received according to downlink path loss determines the transmission power for carrying out D2D communication, i.e. phase D2D data, the hair of D2D of embodiment of the present invention communication are emitted with maximum transmission power to the first UE of the communication of D2D in the prior art It penetrates power to be determined using downlink path loss estimation, so that the decline of the D2D signal experience channel of the UE of D2D communication The reception power for reaching the network equipment afterwards is not above the reception that the UE carries out the uplink signal arrival network equipment of uplink communication Power, it is ensured that the uplink signal for receiving power and other UE that the D2D signal of the UE of D2D communication reaches the network equipment reaches The reception power of the network equipment is suitable, can reduce or avoids band internal leakage to interfere, will not influence the uplink signal of other UE Reception, and then D2D can be reduced and communicate influence to uplink communication.

Embodiment three

The embodiment of the present invention three provides a kind of UE300, which is related to for executing subsequent embodiment six to embodiment eight Method flow, Fig. 4 show UE300 provided in an embodiment of the present invention and constitutes schematic diagram, as shown in figure 4, the embodiment of the present invention The UE300 of offer includes: receiving unit 31, determination unit 32 and transmitting unit 33, wherein

Determination unit 32, for obtaining uplink transmission power parameter, and according to downlink path loss estimation and receiving unit 31 received uplink transmission power parameters determine the transmission power of D2D communication；

Transmitting unit 33, the transmission power of the D2D communication for being determined according to determination unit 32, emits D2D data.

Optionally, UE300 provided in an embodiment of the present invention can also include storage unit (not shown), and storage unit can be with For storing uplink transmission power parameter, determination unit 32 be for obtaining uplink transmission power parameter from the storage unit, Wherein, the uplink transmission power parameter of storage unit storage is that receiving unit 31 is received from the network equipment.

Optionally, receiving unit 31, for receiving the uplink transmission power parameter of network equipment transmitting；Determination unit 32 is Uplink transmission power parameter is obtained from the receiving unit 31.

In conjunction with above-described embodiment three, in the first implementation, determination unit 32, specifically for determining as follows The transmission power of D2D communication:

In conjunction with the first implementation of above-described embodiment three, in the second implementation, determination unit 32 is specifically used In the transmission power for determining D2D communication according to the uplink transmission power as follows: by uplink transmission power, as D2D The transmission power of communication.

In conjunction with the first implementation of above-described embodiment three, in the third implementation, determination unit 32 is specific to use In the transmission power for determining D2D communication according to the uplink transmission power as follows: determining belonging to uplink transmission power Power grade；And

According to the first corresponding relationship, the transmission power of D2D communication is determined, the first corresponding relationship is that power grade and D2D are logical Corresponding relationship between the transmission power of letter.

In conjunction with the third implementation of above-described embodiment three, in the 4th kind of implementation, determination unit 32 is specific to use In determining power grade belonging to the uplink transmission power as follows: determining the modulation format of D2D communication, and determine Row transmission power power grade affiliated under the modulation format of corresponding D2D communication；And

Determination unit 32, specifically for determining power grade belonging to the uplink transmission power: foundation as follows Uplink transmission power, D2D communication modulation format and each modulation format under the transmission power that is communicated with D2D of power grade it Between corresponding relationship, determine D2D communication transmission power.

In conjunction with above-described embodiment three, in the 5th kind of implementation, determination unit 32 is also used to: obtaining power bias amount；

Determination unit 32, specifically for determining the transmission power of the D2D communication as follows:

Optionally, power bias amount can be stores in storage unit, and determination unit 32 obtains from the storage unit Power bias amount；Alternatively, power bias amount can be what receiving unit 31 was received from the network equipment, determination unit 32 connects from this It receives and obtains power bias amount in unit 31.

In conjunction with above-described embodiment three, in the 6th kind of implementation, determination unit 32, specifically for determining as follows The transmission power of the D2D communication:

Optionally, which, which can be, is pre-configured in storage unit, and determination unit is from the storage unit The corresponding relationship is obtained, alternatively, corresponding relationship can be what receiving unit was received from the network equipment, determination unit is from the reception The corresponding relationship is obtained in unit.Other corresponding relationships can also be similar in the present embodiment, and repeats no more herein.

In conjunction with any of the above-described kind of implementation of above-described embodiment three, in the 7th kind of implementation, determination unit 32, also For: the transmission power communicated according to D2D determines the number of transmissions or number of retransmissions；

Transmitting unit 33 is specifically used for emitting D2D data as follows: be communicated according to determining the number of transmissions and D2D Transmission power, emit D2D data；Or the transmission power communicated according to determining number of retransmissions and D2D, emit D2D data.

In conjunction with the 7th kind of implementation of above-described embodiment three, in the 8th kind of implementation, determination unit 32 is specific to use In determining the number of transmissions or number of retransmissions as follows:

In conjunction with the 7th kind of implementation of above-described embodiment three or the 8th kind of implementation of above-described embodiment three, In 9th kind of implementation, transmitting unit 33 is also used to:

Emitting the number of transmissions information, the number of transmissions information receives data according to the number of transmissions information for the 2nd UE, the Two UE are the terminals that D2D communication is carried out with the first UE；Or

Emitting number of retransmissions information, number of retransmissions information receives data according to the number of retransmissions information for the 2nd UE, the Two UE are the terminals that D2D communication is carried out with the first UE.

In conjunction with the 9th kind of implementation of above-described embodiment three, in the tenth kind of implementation, transmitting unit 33 is specific to use In transmitting the number of transmissions information or number of retransmissions information as follows:

The UE provided in the embodiment of the present invention, when the transmission power for carrying out D2D communication determines, according to downlink path loss The uplink transmission power parameter estimated and received determines the transmission power for carrying out D2D communication, i.e., middle D2D compared with the prior art The UE of communication emits D2D data with maximum transmission power, and the transmission power of D2D of embodiment of the present invention communication is using downlink path Loss estimation is determined, so that reaching the reception of the network equipment after the decline of the D2D signal experience channel of the UE of D2D communication Power is not above the reception power that the UE carries out the uplink signal arrival network equipment of uplink communication, it is ensured that D2D communication UE D2D signal reach the network equipment the uplink signal arrival network equipment for receiving power and other UE reception power phase When, can reduce or avoid band internal leakage interfere, will not influence the reception of the uplink signal of other UE, and then can reduce D2D communicates the influence to uplink communication.

Example IV

The embodiment of the present invention four provides a kind of network equipment 400, which relates to for executing subsequent embodiment nine And method flow, Fig. 5 show the embodiment of the present invention four offer the network equipment 400 constitute schematic diagram, as shown in figure 5, should The network equipment 400 includes determination unit 41 and issuance unit 42, wherein

Determination unit 41, for determining uplink transmission power parameter；

Issuance unit 42, the uplink transmission power parameter determined for issuing determination unit 41, uplink transmission power parameter The first UE for device-to-device D2D communication determines D2D communication according to downlink path loss and uplink transmission power parameter Transmission power.

In conjunction with above-described embodiment four, in the first implementation, determination unit 41 is also used to: determining power bias amount；

Issuance unit 42, is also used to: issuing power bias amount；

Wherein, power bias amount emits function according to power bias amount, downlink path loss estimation and uplink for the first UE Rate parameter determines the transmission power of D2D communication.

In conjunction with above-described embodiment four or the first implementation of above-described embodiment four, in the second implementation, Determination unit 41, is also used to: determining the transmitted bandwidth of D2D communication；

Issuance unit 42, is also used to: issuing the transmitted bandwidth of D2D communication；

Wherein, the transmitted bandwidth of D2D communication is estimated for the first UE transmitted bandwidth, the downlink path loss communicated according to D2D Meter and uplink transmission power parameter, determine uplink transmission power.

It should be noted that issuance unit 42 can only issue the transmitting of power bias amount and D2D communication in the present embodiment One in bandwidth or the two all issue.If issuance unit 42 only issues the transmitted bandwidth of D2D communication, the first UE is according to this Transmitted bandwidth, downlink path loss estimation and the uplink transmission power parameter of D2D communication, determine uplink transmission power, do not use Power bias amount may be implemented using preconfigured power bias amount；If issuance unit 42 only issues power bias Amount, the first UE is determining that uplink transmission power is the transmitted bandwidth that preconfigured D2D communication can be used, or uses other Preconfigured bandwidth value.

In conjunction with any implementation of above-described embodiment four, in the third implementation, determination unit 41 is also used In: determine the modulation format of D2D communication；

Issuance unit 42, is also used to: issuing the modulation format of D2D communication；

Wherein, the modulation format of D2D communication is estimated for the first UE modulation format, the downlink path loss communicated according to D2D Meter and uplink transmission power parameter, determine uplink transmission power.

In conjunction with the first implementation of above-described embodiment four, in the 4th kind of implementation, issuance unit 42 is specifically used In issuing the power bias amount as follows: using broadcast mode, radio resource control RRC signaling mode and physics At least one of layer Method of Signaling Control mode, issues power bias amount.

The network equipment provided in an embodiment of the present invention issues the hair that uplink transmission power parameter, power bias amount, D2D are communicated It penetrates bandwidth or the modulation format of D2D communication etc. to carry out, the transmission power for allowing to carry out the UE progress D2D communication of D2D communication determines When, the uplink transmission power parameter estimated and received according to downlink path loss determines the transmission power for carrying out D2D communication, The i.e. compared with the prior art UE of middle D2D communication emits D2D data, the hair of D2D of embodiment of the present invention communication with maximum transmission power It penetrates power to be determined using downlink path loss estimation, so that the decline of the D2D signal experience channel of the UE of D2D communication The reception power for reaching the network equipment afterwards is not above the reception that the UE carries out the uplink signal arrival network equipment of uplink communication Power, it is ensured that the uplink signal for receiving power and other UE that the D2D signal of the UE of D2D communication reaches the network equipment reaches The reception power of the network equipment is suitable, can reduce or avoids band internal leakage to interfere, will not influence the uplink signal of other UE Reception, and then D2D can be reduced and communicate influence to uplink communication.

Embodiment five

The embodiment of the present invention five provides a kind of communication system 500, which includes what above-described embodiment three was related to The network equipment 400 that UE300 and example IV are related to, Fig. 6 show communication system provided in an embodiment of the present invention and constitute signal Figure.

The UE and the network equipment for including in communication system provided in an embodiment of the present invention have involved in above-described embodiment Repertoire specifically sees the associated description of above-described embodiment, and details are not described herein for the embodiment of the present invention.

Communication system provided in an embodiment of the present invention, UE is when the transmission power for carrying out D2D communication determines, according to lower walking along the street Compared with the prior art the uplink transmission power parameter that diameter loss is estimated and received determines the transmission power for carrying out D2D communication, i.e., The UE of middle D2D communication emits D2D data with maximum transmission power, and the transmission power of D2D of embodiment of the present invention communication is to use down The estimation of row path loss is determined, so that reaching the network equipment after the decline of the D2D signal experience channel of the UE of D2D communication Reception power be not above the UE carry out uplink communication uplink signal reach the network equipment reception power, it is ensured that The uplink signal for receiving power and other UE to the network equipment that the D2D signal of the UE of D2D communication reaches the network equipment reaches net The reception power of network equipment is suitable, can reduce or avoids band internal leakage to interfere, will not influence the uplink signal of other UE It receives, and then influence of the D2D communication to uplink communication can be reduced.

Embodiment six

Based on the above embodiment one and the communication equipment that provides of embodiment three, the embodiment of the present invention six provides a kind of communication party Method, Fig. 7 A show communication means implementation flow chart provided in an embodiment of the present invention, to realize Fig. 7 A institute in the embodiment of the present invention The executing subject of the communication means shown be the first UE for be illustrated, as shown in Figure 7 A this method comprises:

S101: the one UE obtains uplink transmission power parameter.

The uplink transmission power parameter that S102: the one UE estimates and receives according to downlink path loss determines that D2D is communicated Transmission power.

S103: the one UE emits D2D data according to the transmission power of the D2D communication determined in S102.

Wherein, the first UE obtains uplink transmission power parameter and is referred to description above, and this embodiment is not repeated.

The specific implementation process respectively to S102 and S103 is illustrated below the embodiment of the present invention.

The embodiment of the present invention execute above-mentioned S102 when, the first UE can according to actually carry out be the first UE and the 2nd UE it Between the uplink communication that carries out of D2D communication or the first UE and the network equipment, determine the transmission power of corresponding link.First UE When determining the transmission power of D2D communication, uplink transmission power parameter can be to be issued by the network equipment.

UE, which carries out D2D communication, can maximum transmission power P_maxLimitation, D2D communication transmission power p be no more than maximum Transmission power P_max.The maximum transmission power P of D2D communication_maxIt can predefine or be issued by network side, when UE is according to downlink The transmission power p for the D2D communication that path loss estimation and uplink transmission power parameter determine is greater than the emission maximum function of D2D communication Rate P_maxWhen, UE selects the maximum transmission power P of D2D communication_maxThe transmission power communicated as final D2D.At this point, UE The reception power of D2D signal of communication to the network equipment is less than reception power of other UE uplink signals to the network equipment, the D2D of UE Signal of communication does not have an impact uplink communication.

In the embodiment of the present invention, determined as the first UE according to downlink path loss estimation and uplink transmission power parameter When the transmission power of D2D communication is greater than the maximum transmission power of D2D communication, the emission maximum of the smaller D2D communication of value is selected Power avoids the band internal leakage to other UE uplink signals, and the influence to uplink communication further decreases, and logical using D2D The maximum transmission power of letter carries out the transmission of D2D data, it is ensured that the transmission power of UE is saved in being normally carried out for D2D communication.

Uplink transmission power parameter can be the network equipment and be issued with the forms of broadcasting in the embodiment of the present invention, be also possible to net Network equipment is issued using unicast fashion, for example, by using RRC (radio resource control wireless heterogeneous networks) signaling or Person's physical layer signaling mode issues or the network equipment can also be issued by the way of broadcast and unicast combination.

Specifically, it is logical to carry out D2D according to downlink path loss estimation and uplink transmission power parameter in the embodiment of the present invention The timing really of the transmission power of letter, preferably such as under type:

First way

The transmitted bandwidth and downlink path loss estimation that S102a: the one UE foundation uplink transmission power parameter, D2D are communicated, It determines uplink transmission power, and determines the transmission power of D2D communication according to uplink transmission power.

Wherein, the first UE is according to uplink transmission power parameter, the D2D transmitted bandwidth communicated and downlink path loss estimation (downlink pathloss estimate), determines that mechanism determines uplink transmission power according to uplink transmission power.

Uplink transmission power by a slow speed open Loop Power control and quick close-loop power control two parts form.Specifically , the uplink transmission power in the embodiment of the present invention determines that mechanism can be and determines any of uplink transmission power in the prior art Method, such as serving cell c, as the only physically shared channel (Physical of row in subframe (subframe) i Uplink Shared Channel, PUSCH) transmission upstream data when, uplink transmission power determines that mechanism can refer to formula (1):

Wherein, P in formula (1)_{PUSCH, c}It (i) is uplink transmission power；P_{CMAX, c}(i) the maximum rated transmission power for being UE； P_{O_PUSCH, c}(j) and α_cIt (j) is high-rise configuration parameter；M_{PUSCH, c}It (i) is the transmitted bandwidth of uplink communication, PL_cIt is that UE and service are small Downlink path loss estimation between the network equipment of area c；f_c(i)=f_c(i-1)+δ_{PUSCH, c}(i-K_PUSCH) or f_c(i)= δ_{PUSCH, c}(i-K_PUSCH), δ_{PUSCH, c}For power adjustment, K_PUSCHIt is a subframe amount of bias；K_SIt is to be provided by high-rise configuration parameter deltaMCS-Enabled, The different values of deltaMCS-Enabled correspond to K_S=1.25 or K_S=0, BPRE andAll for control signaling and data Emit required parameter on PUSCH.

In the prior art, power adjustment δ_{PUSCH, c}Refer to and is dynamically included in Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH) or reinforced Physical Downlink Control Channel (Enhanced Physical Downlink Control Channel, PDCCH) down link control information (Downlink Control Information, DCI) transmission power control domain (Transmission Power in version (format) 0 or edition 4 Control, TPC), or the TPC in PDCCH DCI version 3 or version 3 A.δ_{PUSCH, c}Parameter can be set according to high level Whether Accumulation-enabled (accumulated value activation parameter), which is activated, is chosen accumulated value (to power in previous sub-frame basis Upper accumulation f_c(i)=f_c(i-1)+δ_{PUSCH, c}(i-K_PUSCH)) or absolute value (f_c(i)=δ_{PUSCH, c}(i-K_PUSCH)), such as when Accumulation-enabled be activated (as enabled) when, when the DCI version of TPC is 0 or 3 or 4, select in table 1 Accumulated value one arranges, and when the DCI version of TPC is 3A, the accumulated value one in table 2 is selected to arrange, when Accumulation-enabled not Be activated (as disabled), when the DCI version of TPC is 0 or 4, the absolute value one in table 1 is selected to arrange.

TPC (DCI format 0 or 3 or 4)	Accumulated value δ_{PUSCH, c}(dB)	Absolute value δ_{PUSCH, c}(dB) (DCI format 0 or 4)
			0	-1	-4
1	0	-1
			2	1	1
3	3	4

Table 1

TPC(DCI format 3A)	Accumulated value δ_{PUSCH, c}(dB)
		0	-1
1	1

Table 2

In the embodiment of the present invention, uplink transmission power parameter includes the high-rise configuration parameter P_{O_PUSCH, c}(j)、α_c(j) and DeltaMCS-Enable and physical layer configuration parameter δ_{PUSCH, c}。P_{O_PUSCH, c}(j)、α_c(j), deltaMCS-Enable and δ_{PUSCH, c}It is the network equipment according to carrying out setting the case where practical communication and be transmitted to UE by the network equipment.The hair of D2D communication Penetrate bandwidth M_{PUSCH, c}(i) it predefines or dispatch and obtain from eNB from, downlink path loss is estimated as UE and passes through to measure to obtain 's.

Determine mechanism with above-mentioned existing uplink transmission power the difference is that, in the embodiment of the present invention, in determination Transmitted bandwidth used in row transmission power is the transmitted bandwidth of D2D communication, rather than uses the uplink communication in above-mentioned formula Transmitted bandwidth M_{PUSCH, c}(i), the uplink transmission power being calculated in this way can guarantee that the D2D signal of actual transmission reaches net The reception power of network equipment is not above the reception power that the first UE carries out the uplink signal arrival network equipment of uplink communication, can To guarantee that the reception power of the D2D signal arrival network equipment and the uplink signal of other UE of the first UE reach connecing for the network equipment It is suitable to receive power, can reduce or avoid band internal leakage to interfere, will not influence the reception of the uplink signal of other UE.Also, In the present embodiment, PL_cBe UE by measurement obtain downlink path loss estimation, this also in the prior art carry out D2D communication Transmission power estimated when determining using the path loss of D2D communication different, and then D2D communication can be reduced to uplink communication It influences.

Need to stress, the first UE that D2D is communicated in the embodiment of the present invention according to uplink transmission power parameter and When uplink transmission power determines that mechanism determines uplink transmission power, transmitted bandwidth M used_{PUSCH, c}(i) for it is predefined or from The transmitted bandwidth that obtained D2D communication is dispatched at eNB, determines that when uses different from carrying out uplink transmission power in the prior art The transmitted bandwidth of uplink communication；PL used_cIt is the downlink path loss estimation that UE is obtained by measurement, D2D is communicated hereinafter First UE computationally row transmission power when be also in accordance with that the transmitted bandwidth of D2D communication, downlink path loss counted It calculates.

Explanation is needed further exist for, the purpose of the present invention is reducing influence of the D2D communication to uplink communication, as the first UE The transmission power of the D2D communication determining according to downlink path loss estimation and uplink transmission power parameter is greater than D2D and communicates most When sending out transmission power, the maximum transmission power of the smaller D2D communication of value is selected, avoids letting out in the band to other UE uplink signals Leakage, influences to further decrease, and the transmission of D2D data is carried out using the maximum transmission power of D2D communication, it is ensured that D2D Being normally carried out for communication, saves the transmission power of UE.

Optionally, the transmission power that determining uplink transmission power can be communicated directly as D2D in the embodiment of the present invention, The transmission power of D2D communication is determined after can also being quantified uplink transmission power.Preferably uplink is sent out in the embodiment of the present invention The mode that power is quantified is penetrated, uplink transmission power quantify and determine the transmitting of D2D communication in the embodiment of the present invention Power can be used such as under type:

Determine power grade belonging to uplink transmission power, after power grade belonging to uplink transmission power has been determined, The transmission power of D2D communication, the present invention can be determined according to the corresponding relationship between the transmission power that power grade is communicated with D2D The corresponding relationship between transmission power that power grade is communicated with D2D can be known as the first corresponding relationship in embodiment.

The first corresponding relationship can be preset in the embodiment of the present invention, preset first corresponding relationship can be as shown in table 3:

Table 3

In table 3, P_min, P₁..., P_maxBe system it is predetermined divide power grade separation (or for quantization Point), P_min>=0, P_maxMaximum can be equal to the specified transmission power of UE, and specific value can be by network equipments configuration or pre- Definition.What separation can be set based on experience value.Assume the first UE according to uplink transmission power in the embodiment of the present invention It is that p then may be used after uplink transmission power p has been determined that parameter and uplink transmission power, which determine that mechanism calculates uplink transmission power, Determine power grade belonging to uplink transmission power p, in a certain grade, D2D communication can use unified transmission power.Example Such as, as uplink transmission power p, meet P₁< p≤P₂When, then it can determine that the transmission power of D2D communication is P_N, the first UE then foundation Transmission power P_NEmit D2D data.When value is in a certain range, the transmission power that communicates the first UE D2D and the The uplink transmission power of one UE is suitable, it is ensured that the D2D signal of the first UE reaches the reception power and other UE of the network equipment Uplink signal reach the network equipment reception power it is suitable, can reduce or avoid band internal leakage interfere.It is sent out by quantization Power is penetrated, the value of the transmission power of the D2D communication of the first UE can be further limited, limit the D2D signal of the first UE Coverage area is convenient for subsequent compensation coverage area.

It should be noted that the division of power grade can be divided according to the actual situation in the embodiment of the present invention, example Power grade that such as can be more with division numbers, so that the adjustment of D2D power of communications is finer, or can be less with division numbers Power grade, for example two grades are divided, so that the transmission power of D2D communication is less, convenient for the reception of the 2nd UE of D2D communication Processing.In certain embodiment of the present invention can not also divided rank, carry out the first UE of D2D communication all in accordance with a lesser power Transmitting, which is the maximum power not impacted to system；Or UE is carried out meeting the UE that the network equipment issues Transmission power is adjusted in the case where the upper limit of the maximum transmission power of D2D communication.

Further, the size of transmission power can also be related to modulation format, when the D2D transmission of same UE is using different When modulation format, transmission power be can also be different, therefore when the modulation format of the first UE of D2D communication is variable, then the first UE can With the modulation format of the D2D communication used according to the first UE, the determination of D2D communication transmission power is carried out.

Specifically, the hair that the first UE can be communicated according to the uplink transmission power parameter of the first UE, D2D in the embodiment of the present invention Bandwidth, the modulation format of D2D communication and downlink path loss estimation are penetrated, determines that mechanism determines that uplink is sent out according to uplink transmission power Power is penetrated, and determines the transmission power of D2D communication according to determining uplink transmission power.

The transmission power that can be communicated determining uplink transmission power directly as D2D in the embodiment of the present invention, can also The transmission power of D2D communication is determined after quantifying to uplink transmission power.

The power under the power grade and each modulation format under each modulation format can be pre-defined in the embodiment of the present invention The corresponding relationship between transmission power that grade is communicated with D2D, as shown in table 4:

Table 4

Before the transmission power for determining D2D communication in the embodiment of the present invention according to corresponding relationship shown in table 4, D2D is carried out The transmitted bandwidth of uplink transmission power parameter, D2D communication that first UE of communication needs to issue according to the network equipment, D2D communication Modulation format and downlink path loss estimation, determine that mechanism determines uplink transmission power, Yi Jisuo according to uplink transmission power State uplink transmission power power grade affiliated under the modulation format that corresponding D2D is communicated.

The first UE can be according to the transmitted bandwidth of D2D communication, the modulation format of D2D communication, lower walking along the street in the embodiment of the present invention The uplink transmission power parameter of diameter loss estimation and network equipment transmitting, determines uplink transmission power.

Optionally, the first UE can according to the network equipment emit deltaMCS-Enabled determine transmission power whether with tune Format processed is related, when deltaMCS-Enabled un-activation, shows that transmission power is unrelated with modulation format, then carries out uplink hair When penetrating power and determining, modulation format can not be considered；When deltaMCS-Enabled activation, show transmission power and modulation lattice Formula is related, when the uplink transmission power of the first UE progress at this time determines, in combination with uplink transmission power parameter, the transmitting of D2D communication Bandwidth, the modulation format of D2D communication and downlink path loss estimation, determine uplink transmission power, it is assumed that in the embodiment of the present invention The modulation format for determining D2D communication is QPSK, and determining uplink transmission power is p at this time_QPSK, and the p_QPSKMeet P_min-QPSK≤ p_QPSK< P_1-QPSK, according under the power grade and each modulation format under each modulation format shown in table 4 power grade with Corresponding relationship between the transmission power of D2D communication, it is known that P_min-QPSK≤p_QPSK< P_1-QPSKCorresponding D2D communication in grade Transmission power is P_M-QPSK, then determine that the transmission power of D2D communication is P at this time_M-QPSK, the first UE is according to transmission power P_M-QPSKHair Penetrate D2D data.

Different modulation formats corresponds to different uplink transmission powers, because uplink emits function when modulation format difference Rate also uses different quantized values therewith, adapts to each modulation format.The transmitting of the above-mentioned carry out D2D communication of the embodiment of the present invention The method of determination of power, so that the value of the transmission power of D2D communication is in a certain range, as far as possible under a certain modulation format So that the transmission power that the D2D of the first UE is communicated is suitable with the first UE progress uplink transmission power of uplink communication, it is ensured that The D2D signal of first UE reaches the reception power for receiving power and the uplink signal arrival network equipment of other UE of the network equipment Quite, it reduces or avoids band internal leakage to interfere, the influence that can guarantee that D2D communication communicates network uplink is minimized. By quantifying transmission power, the value for the transmission power that the D2D by further limiting UE is communicated limits the D2D signal of UE Coverage area is convenient for subsequent compensation coverage area.Further, the first UE carries out D2D communication transmitting function in the embodiment of the present invention It when rate determines, partially uses uplink power and determines mechanism and parameter, it is not necessary to for the additional ginseng for increasing power control of D2D communication Number, while avoiding notifying the complexities for covering parameter (uplink transmission power parameter and D2D transmission power parameter), it saves individually. more Notify the power control signaling overheads of D2D communication.

The second way

S102b: the one UE obtains power bias amount and receives the uplink transmission power parameter of network equipment transmitting, the first UE According to the uplink transmission power parameter of network equipment transmitting, the transmitted bandwidth of D2D communication, downlink path loss estimation and obtain Power bias amount, determine D2D communication transmission power.

Specifically, broadcast can be used in the network equipment in the embodiment of the present invention or the mode of multicast is biased to UE transmission power Amount and uplink transmission power parameter, wherein the network equipment transmitting power bias amount be D2D communication transmission power relatively on One power bias amount of row transmission power, can be using the high-rise configuration parameter of notice or physical layer configuration parameter, Huo Zhegao The mode that layer configuration parameter and physical layer configuration parameter combine.For example, high-rise configuration parameter notifies first amount of bias, and object Reason layer configuration parameter notifies the second amount of bias, and the first UE obtains power bias amount by the first amount of bias and the second amount of bias；Or Person only notifies the mode of the first amount of bias or the second amount of bias.Power bias amount can also predefine in the embodiment of the present invention.This It may be assumed that the power bias amount is σ in inventive embodiments, wherein σ can be positive number, negative or zero.First UE can be according to network The uplink transmission power parameter of equipment transmitting, determines uplink transmission power, specific determination process is seen in first way The determination process for the determination uplink transmission power being related to, details are not described herein for the embodiment of the present invention.

Assume that according to the uplink transmission power that uplink transmission power parameter determines be p in the embodiment of the present invention, then D2D is communicated Transmission power can be expressed as P+ σ, the determination process of the transmission power of D2D communication is relatively simple.Certainly, the embodiment of the present invention It is also possible to define transmission power of the more complicated non-linear formula to determine D2D communication.

Optionally, as the high-rise configuration parameter deltaMCS-Enabled of uplink transmission power parameter in the embodiment of the present invention When activation, the tune of transmitted bandwidth, D2D communication that the first UE is communicated according to the uplink transmission power parameter of network equipment transmitting, D2D Format processed, power bias amount downlink path loss estimation and obtained, determine the transmission power of D2D communication.

It is more than the embodiment of the present invention carry out D2D communication transmission power determination during, D2D communication the first UE according to The uplink transmission power parameter that downlink path loss is estimated and received determines the transmission power for carrying out D2D communication, i.e., relatively existing There is the first UE that D2D is communicated in technology to emit D2D data, the transmitting function of D2D of embodiment of the present invention communication with maximum transmission power Rate is determined using downlink path loss estimation, so that the D2D signal of communication experience channel of the first UE of D2D communication The uplink signal that the reception power of the arrival network equipment is not above the first UE progress uplink communication after decline reaches network and sets Standby reception power, it is ensured that D2D communication the first UE D2D signal of communication reach the network equipment reception power and other The reception power that the uplink signal of UE reaches the network equipment is suitable, can reduce or avoids band internal leakage to interfere, will not influence The reception of the uplink signal of other UE, and then influence of the D2D communication to uplink communication can be reduced.

The third mode

Uplink transmission power parameter of S102c: the one UE according to network equipment transmitting, determines according to default corresponding relationship D2D transmission power parameter, transmitted bandwidth and downlink path loss according to the D2D transmission power parameter, D2D communication determined are estimated Meter determines the transmission power of D2D communication.

Specifically, the first UE can be D2D communication, or and the network equipment according to what is actually carried out in the embodiment of the present invention Traditional communication, can to the uplink transmission power parameter that the network equipment issues use different Explanation ways, therefore the present invention implement The first UE is when the transmission power for carrying out D2D communication determines in example, the uplink transmission power parameter that can emit the network equipment, solution It reads to be D2D transmission power parameter needed for D2D communication, then according to the algorithm of uplink transmission power, D2D communication is calculated Transmission power.

The embodiment of the present invention is illustrated for interpreting TPC, obtains Tables 1 and 2 institute after interpreting in the prior art to TPC The δ shown_{PUSCH, c}It is worth, can is to carry out uplink communication by identical TPC foundation according to preset corresponding relationship in the embodiment of the present invention Or D2D communication is read as different values, which kind of being specifically read as TPC in D2D communication which refers to δ_{PUSCH, c}Value is pre-set, such as TPC can be read as to the accumulation of D2D shown in table 5 and table 6 in the embodiment of the present invention Value δ_{PUSCH, c}Or D2D absolute value δ_{PUSCH, c}。

Table 5

Table 6

Specifically, table 5 and table 6 are to be added to D2D accumulated value on the basis of Tables 1 and 2 in the embodiment of the present invention δ_{PUSCH, c}With D2D absolute value δ_{PUSCH, c}Two column, i.e., in the embodiment of the present invention table 5 and table 6 be by the value or state of same TPC, it is right It is communicated in uplink communication and D2D, is read as different δ respectively_{PUSCH, c}Value.

It should be noted that more than the embodiment of the present invention being only illustrated by taking TPC as an example.For the transmitting function of D2D communication It is similar when rate determines, other uplink transmission power parameters such as P_{O_PUSCH, c}(j), α_c(j) etc. it can use and uplink communication Identical parameter, but by the identical parameter, for uplink communication and the corresponding different value of D2D communication, for by uplink The occurrence that transmission power parameter is read as D2D transmission power parameter can be pre-set.

Optionally, as the high-rise configuration parameter deltaMCS-Enabled of uplink transmission power parameter in the embodiment of the present invention When activation, uplink transmission power parameter of the first UE according to network equipment transmitting determines that D2D emits according to preset corresponding relationship Power parameter, and according to determining D2D transmission power parameter, D2D communicate transmitted bandwidth, D2D communication modulation format and under The estimation of row path loss determines that the transmission power of D2D communication is calculated in mechanism according to uplink transmission power.

Optionally, machine is determined according to the D2D transmission power parameter and uplink transmission power determined in the embodiment of the present invention System after the transmission power of D2D communication is calculated, can also quantify the transmission power of obtained D2D communication, that is, determine Power grade belonging to the transmission power of D2D communication, in a certain grade, D2D communication uses unified transmission power, specifically Implementation can refer to the process quantified in the first implementation to uplink transmission power, and details are not described herein.

Different Explanation ways can be used to uplink transmission power parameter in the embodiment of the present invention, it is not necessary to communicate for D2D The additional parameter for increasing power control, does not increase additional power control signaling overheads, avoids notifying more set parameter (uplink transmittings Power parameter and D2D transmission power parameter) complexity, save be notified independently D2D communication power control signaling overheads.

The determination that any mode in above-mentioned three kinds of modes carries out uplink reflection power can be used in the embodiment of the present invention, The specific implementation process that first UE carries out D2D communication can be as shown in Fig. 7 B and Fig. 7 C.

Optionally, the transmission power that D2D is communicated in the embodiment of the present invention is according to uplink transmission power parameter and lower walking along the street Diameter loss estimation is determined, therefore the transmission power of the D2D of the first UE communication can be by uplink between the network equipment and the first UE The uplink power of communication determines that mechanism is determined, and is only determining that transmitted bandwidth used in uplink transmission power is logical for D2D The transmitted bandwidth of letter, PL_cIt is the downlink path loss estimation that the first UE is obtained by measurement, therefore participates in the of different D2D communication The transmission power of the D2D communication of one UE different (may be determined, such as net by the link state of the first UE and the network equipment At a distance from the first UE that network equipment is communicated with D2D), therefore the coverage area of multiple the first UE for carrying out D2D communication is communicated due to D2D The difference of transmission power and it is different, reach unified receptivity in the embodiment of the present invention, for example carry out different D2D communications The first UE coverage area it is identical, can D2D communicate the first UE determined D2D communication transmission power after, determine transmission Number or number of retransmissions can increase the number of transmissions or number of retransmissions of the D2D data of low transmitting power in the embodiment of the present invention, Increase the transmission opportunity of D2D data in time-domain, so that the first UE of each D2D communication of the transmission power of difference D2D communication With unified receptivity index, guarantee being normally carried out for D2D communication.

Specifically, the first UE determines the transmission power of D2D communication according to uplink transmission power in the embodiment of the present invention, and really The realization process for determining number of retransmissions can be as illustrated in fig. 7d, comprising:

S201: the one UE estimates to determine the transmitting function of D2D communication according to uplink transmission power parameter and downlink path loss Rate.

First UE determines that the specific implementation process of the transmission power of D2D communication sees what D2D in above-described embodiment was communicated The method of determination of transmission power, details are not described herein.

S202: the transmission power communicated according to D2D determines the number of transmissions or number of retransmissions.

The transmission power of D2D communication and the corresponding relationship or default D2D of number of retransmissions can be preset in the embodiment of the present invention The transmission power of communication and the corresponding relationship of number of retransmissions by the transmission power of D2D communication and retransmit time in the embodiment of the present invention The corresponding relationship of the transmission power and number of retransmissions of several corresponding relationships or D2D communication is known as the second corresponding relationship.First UE When determining the number of transmissions or number of retransmissions according to the transmission power that D2D is communicated, the number of transmissions can be determined according to the second corresponding relationship Or number of retransmissions.

Specifically, the second corresponding relationship can be preset in the embodiment of the present invention, it is unrelated with modulation format in transmission power When, settable second corresponding relationship as shown in table 7 is when transmission power is related with modulation format, then settable as shown in table 8 The second corresponding relationship, the specific form of expression can be as shown in table 7 and table 8:

The transmission power of D2D communication	The number of transmissions or number of retransmissions
		P_M	M
P_N	N
		P_K	K
P_max	Max

Table 7

Table 8

Specifically, table 3 and table 7, table 4 and table 8, preset table 9 can be combined in the embodiment of the present invention when carrying out D2D communication Or corresponding relationship or uplink between the transmission power and the number of transmissions of uplink transmission power shown in table 10, D2D communication Corresponding relationship between transmission power, the transmission power and number of retransmissions of D2D communication:

Grade belonging to uplink transmission power	The transmission power of D2D communication	The number of transmissions or number of retransmissions
			P_min< P≤P₁	P_M	M
P₁< P≤P₂	P_N	N
			P₂< P≤P_max	P_K	K
P≥P_max	P_max	Max

Table 9

Table 10

Certainly, in the embodiment of the present invention in specific execute, also in combination with table 9 and table 10, as shown in table 11 upper is preset Corresponding relationship or default uplink transmission power, D2D between row transmission power, the transmission power and the number of transmissions of D2D communication Corresponding relationship between the transmission power and number of retransmissions of communication:

Table 11

If specifically, not carrying out the first of D2D communication to transmission power quantization and divided rank in the embodiment of the present invention UE uses the transmission power of identical D2D communication, and according to preset second corresponding relationship, carries out the transmitting of D2D data.If To uplink transmission power divided rank, then the transmission power that the first UE is communicated using different D2D, then at this time can according to table 7 or Corresponding relationship in table 8 determines the transmission power of D2D communication.The determination for the transmission power that if D2D is communicated in the embodiment of the present invention Process is independently of modulation format, then can determine the number of transmissions or number of retransmissions according to the corresponding relationship in table 7, if D2D is logical The determination process of the transmission power of letter according to modulation format, then can according to the corresponding relationship in table 8, determine the number of transmissions or Number of retransmissions.

S203: D2D number is emitted according to the transmission power of the S202 the number of transmissions determined or number of retransmissions and D2D communication According to.

The number of transmissions or number of retransmissions that the D2D data of low transmitting power can be increased in the embodiment of the present invention, in time-domain The upper transmission opportunity for increasing D2D data, so that the first UE has unified receptivity index.

Optionally, the first UE is sent out according to the transmission power that determining the number of transmissions and D2D are communicated in the embodiment of the present invention When penetrating D2D data, or emitting D2D data according to the transmission power that determining number of retransmissions and D2D are communicated, to make the 2nd UE Processing accurately can be merged to the D2D data received, the first UE can emit the number of transmissions letter in the embodiment of the present invention Breath or number of retransmissions information, as seen in figure 7e, Fig. 7 E is on the basis of Fig. 7 D for concrete implementation process further include:

S204: transmitting the number of transmissions information or number of retransmissions information.

Lead to specifically, dispatch (scheduling assignment, SA) is transmitted to D2D by the first UE that D2D is communicated The instruction for information such as the resources of subsequent D2D data of 2nd UE of letter can be dynamic or semi-persistent scheduling, therefore this hair The first UE can carry the number of transmissions information or number of retransmissions information in SA in bright embodiment, realize the number of transmissions information or re-transmission The transmitting of number information.

It should be noted that S204 can be executed after S203 in the embodiment of the present invention, can also be executed before S203, The embodiment of the present invention is without limitation.

Embodiment seven

The transmission power that the first UE for carrying out D2D communication emits the D2D communication used when D2D data may be different, therefore can The coverage area of the first UE can be caused different, so that the receptivity of the data of the first UE transmitting may be different, such as D2D The first high UE of the transmission power of communication can cover bigger range, it is possible to the 2nd UE communicated by more potential D2D It is properly received, and low the first UE of transmission power of D2D communication covers relatively small range, it is possible to cause by relatively little of latent It is properly received in the 2nd UE of D2D communication, and the target of D2D communication is usually the first UE covering having the same of D2D communication Range.Reach unified receptivity in the embodiment of the present invention, the first UE that can increase low transmitting power carries out data The number of transmissions or number of retransmissions of transmission, increase transmission opportunity in time-domain, so that accumulating after being transmitted several times enough Energy can reach identical receptivity although transmission power is different.

Based on the above embodiment one and the communication equipment that provides of embodiment three, the embodiment of the present invention seven provides a kind of communication party Method, Fig. 8 show communication means implementation flow chart provided in an embodiment of the present invention, to realize shown in Fig. 8 in the embodiment of the present invention Communication means executing subject be the first UE for be illustrated, as shown in figure 8, this method comprises:

S301: the first UE for carrying out D2D communication determines the number of transmissions information or number of retransmissions information of D2D communication.

S302: the first UE for carrying out D2D communication emits according to the S301 the number of transmissions information determined or number of retransmissions information D2D data, and emit the number of transmissions information or number of retransmissions information that S301 is determined.

In the embodiment of the present invention, the first UE of D2D communication determines the number of transmissions information or number of retransmissions letter of D2D communication Breath emits D2D data according to determining the number of transmissions information or number of retransmissions information, it can be ensured that D2D communication is normally carried out.

Preferably, the transmission power that the first UE for carrying out D2D communication in the embodiment of the present invention can be communicated according to D2D is determined and is passed Defeated number information or number of retransmissions information, the transmitting function then communicated according to determining the number of transmissions or number of retransmissions and D2D Rate emits D2D data.

If determining that the number of transmissions information or number of retransmissions are believed according to the transmission power of D2D communication in certain embodiment of the present invention Breath, then before executing S301, carry out D2D communication the first UE it needs to be determined that D2D communicate transmission power, preferably, this hair The first UE that D2D communication is carried out in bright embodiment can determine the transmission power of D2D communication according to uplink transmission power parameter.

Specifically, the first UE for carrying out D2D communication in the embodiment of the present invention can be determined according to uplink transmission power parameter The transmission power that the first UE that D2D is communicated in embodiment six determines D2D communication can be used in the transmission power of D2D communication, such as:

A: the one UE is determined according to uplink transmission power parameter, the D2D transmitted bandwidth communicated and downlink path loss estimation Uplink transmission power, and the transmission power that D2D is communicated is determined according to uplink transmission power；Or the first UE according to uplink emit function Rate parameter, the transmitted bandwidth of D2D communication, the modulation format of D2D communication and downlink path loss estimation, determine that uplink emits function Rate, and the transmission power that D2D is communicated is determined according to uplink transmission power.

When determining the transmission power of D2D communication according to uplink transmission power in the embodiment of the present invention, function can be emitted to uplink Rate is quantified, and determines power grade belonging to uplink transmission power, the transmitting function communicated according to preset power grade with D2D Corresponding relationship between rate determines the transmission power of D2D communication.

B: the one UE is according to the uplink transmission power parameter of network equipment transmitting, the transmitted bandwidth of D2D communication, downlink path The power bias amount of loss estimation and network equipment transmitting, determines the transmission power of D2D communication；Or the first UE according to network Modulation format, the downlink path loss that the uplink transmission power parameter of equipment transmitting, the transmitted bandwidth of D2D communication, D2D are communicated are estimated Meter and the power bias amount of network equipment transmitting, determine the transmission power of D2D communication.

Uplink transmission power parameter of C: the one UE according to network equipment transmitting determines that D2D is sent out according to default corresponding relationship Power parameter is penetrated, transmitted bandwidth and downlink path loss estimation according to the D2D transmission power parameter, D2D communication determined, according to Uplink transmission power determines that the transmission power of D2D communication is calculated in mechanism；Or the first UE according to the network equipment transmitting it is upper Row transmission power parameter determines D2D transmission power parameter according to preset corresponding relationship, and according to determining D2D transmission power Parameter, the transmitted bandwidth of D2D communication, the modulation format of D2D communication and downlink path loss estimation, it is true according to uplink transmission power Determine the transmission power that D2D communication is calculated in mechanism.

The first UE that D2D is communicated in the embodiment of the present invention determines the transmitting function of D2D communication according to uplink transmission power parameter The process of rate sees the associated description in embodiment six, and details are not described herein.

Preferably, the transmission power of D2D communication, the correspondence of the number of transmissions and number of retransmissions can be preset in the embodiment of the present invention Relationship, after the transmission power that D2D communication has been determined, transmission power, the number of transmissions and the re-transmission that can be communicated according to preset D2D The corresponding relationship of number determines the number of transmissions or number of retransmissions, wherein the transmission power of D2D communication, the number of transmissions and re-transmission time Several corresponding relationships sees the associated description in embodiment six, and details are not described herein.

The size of transmission power be also possible to it is related to modulation format, when the network equipment transmits the D2D of same UE, scheduling When different modulation format, transmission power be can also be different, therefore when the modulation format of the first UE of D2D communication is variable, then and the One UE can communicate the modulation format used according to D2D, carry out the determination of D2D communication transmission power.Preferably, the present invention is implemented The modulation that the first UE can be communicated according to high-rise configuration parameter deltaMCS-Enabled, uplink transmission power parameter and D2D in example Format determines uplink transmission power, according to uplink transmission power, determines the function under each modulation format belonging to uplink transmission power Rate grade, so that the first UE of D2D communication can be according to uplink transmission power, the D2D modulation format communicated and preset each The corresponding relationship between transmission power that power grade under modulation format is communicated with D2D determines the transmission power of D2D communication, Power grade under power grade and each modulation format in the embodiment of the present invention under each modulation format predetermined with Corresponding relationship between the transmission power of D2D communication, can further regard to the associated description in embodiment six, no longer superfluous herein It states.

Optionally, the first UE can take in dispatch (scheduling assignment, SA) in the embodiment of the present invention Band the number of transmissions information or number of retransmissions information, realize the transmitting of the number of transmissions information or number of retransmissions information.

First UE involved in the embodiment of the present invention seven carries out the method implementation procedure of D2D communication, and relates in embodiment six And communication performing method it is similar, for described in the embodiment of the present invention not enough in detail place, see in embodiment six Associated description, details are not described herein.

Communication means provided in an embodiment of the present invention, the first UE determine the number of transmissions information or number of retransmissions of D2D communication Information emits D2D data according to determining the number of transmissions information or number of retransmissions information, it can be ensured that D2D communication it is normal into Row.Further, the uplink transmission power parameter that the first UE estimates and receives according to downlink path loss determines and carries out D2D The transmission power of communication, i.e., the first UE of middle D2D communication emits D2D data, this hair with maximum transmission power compared with the prior art The transmission power of bright embodiment D2D communication is determined using downlink path loss estimation, so that the first UE of D2D communication D2D signal of communication experience channel decline after reach the reception power of the network equipment and be not above the first UE to carry out uplink logical The uplink signal of letter reaches the reception power of the network equipment, it is ensured that the D2D signal of communication of the first UE of D2D communication reaches net The reception power of network equipment is suitable with the uplink signal of other UE arrival reception power of the network equipment, can reduce or avoids Band internal leakage is interfered, and will not influence the reception of the uplink signal of other UE, and then can reduce D2D communication to the shadow of uplink communication It rings.

Embodiment eight

The embodiment of the present invention eight provides a kind of communication means, and it is real that Fig. 9 show communication means provided in an embodiment of the present invention Show flow chart, be illustrated so that the executing subject for realizing communication means shown in Fig. 9 is the 2nd UE as an example in the embodiment of the present invention, As shown in figure 9, this method comprises:

S401: the 2nd UE for carrying out D2D communication obtains the number of transmissions information or number of retransmissions information of D2D communication.

S402: the 2nd UE of D2D communication is carried out according to the number of transmissions information or number of retransmissions information of acquisition, receives number According to.

Specifically, if the first UE of D2D communication carries out D2D using communication means involved in embodiment six or embodiment seven The transmitting of communication data carries out the 2nd UE of D2D communication in the embodiment of the present invention, then can according to the number of transmissions information of acquisition or Number of retransmissions information receives data, to guarantee accurately to receive data.

Optionally, if the first UE of D2D communication carries the number of transmissions information or number of retransmissions information in SA notice, the Two UE can obtain dispatch (scheduling assignment, SA) notice, and obtain the number of transmissions information from SA notice Or number of retransmissions information.

Communication means provided in an embodiment of the present invention, the 2nd UE can believe according to the number of transmissions information or number of retransmissions of acquisition Breath receives data, to guarantee accurately to receive data, and can guarantee being normally carried out for D2D communication.

Embodiment nine

Based on the above embodiment two and the communication equipment that provides of example IV, the embodiment of the present invention nine provides a kind of communication party Method, Figure 10 show communication means implementation flow chart provided in an embodiment of the present invention, to realize Figure 10 institute in the embodiment of the present invention The executing subject of the communication means shown is is illustrated for the network equipment, as shown in Figure 10, this method comprises:

S501: the network equipment determines uplink transmission power parameter.

S502: the network equipment issues determining uplink transmission power parameter, so that the first UE emits function according to the uplink Rate parameter determines the transmission power of D2D communication.

Specifically, the network equipment can determine the side of the transmission power of D2D communication according to the first UE in the embodiment of the present invention Formula issues different uplink transmission power parameters, such as the network equipment can issue relevant uplink transmission power parameter, make first UE can emit according to uplink transmission power parameter, the D2D transmitted bandwidth communicated and downlink path loss estimation, or according to uplink Power parameter, the transmitted bandwidth of D2D communication, the modulation format of D2D communication and downlink path loss are estimated to determine that uplink emits function Rate, and the transmission power that D2D is communicated is determined according to determining uplink transmission power；The first UE can also be made to emit according to the network equipment Uplink transmission power parameter, determine D2D transmission power parameter according to default corresponding relationship, it is identical by being used with uplink communication Uplink transmission power parameter be read as different power control adjusted values, as D2D transmission power parameter, then according to determining D2D transmission power parameter, D2D communication transmitted bandwidth and downlink path loss estimation, or emit function according to determining D2D Rate parameter, the transmitted bandwidth of D2D communication, the modulation format of D2D communication and downlink path loss estimate determining uplink transmission power, And determine the transmission power of D2D communication.Certain network equipment can also issue uplink transmission power parameter and power bias amount, make the One UE determines uplink transmission power according to uplink transmission power parameter, then determines the hair of D2D communication according to power bias amount again Penetrate power.

Optionally, the network equipment may further determine that and issue the transmitted bandwidth of D2D communication in the embodiment of the present invention, and the D2D is logical The transmitted bandwidth of letter is the transmitted bandwidth that the first UE is used to carry out D2D communication used when uplink transmission power determines.

Optionally, the network equipment may further determine that and issue the modulation format of D2D communication in the embodiment of the present invention, and the D2D is logical The modulation format of letter is the modulation format that the first UE is used to carry out D2D communication used when uplink transmission power determines.

Optionally, broadcast mode, radio resource control RRC mode or physical layer signaling control can be used in the network equipment The combination of mode processed or above-mentioned several ways issues the hair that uplink transmission power parameter, power bias amount, D2D are communicated Penetrate the modulation format etc. of bandwidth and D2D communication.

For example, the high-rise configuration parameter part in uplink power parameter is by broadcast mode or radio resource control RRC mode issues, and power control field TPC is issued by physical layer signaling.

The power bias amount of network equipment transmitting is a power of the transmission power relative uplink transmission power of D2D communication Amount of bias can use high-rise configuration parameter perhaps physical layer configuration parameter or high-rise configuration parameter and physical layer configurations ginseng The mode that number combines.For example, high-rise configuration parameter notifies first amount of bias, and physical layer configuration parameter notifies one second Amount of bias, the first UE obtain power bias amount in combination with the first amount of bias and the second amount of bias；Certainly it can also only notify that first is inclined The amount of setting or the second amount of bias.

It should be noted that the network equipment is either evolved base station in LTE system in the embodiment of the present invention (eNB), be also possible to Universal Mobile Communication System (Universal Mobile Telecommunications System, UMTS the base station (NB) in) can also be that other are communicated with UE and are the network equipment that UE carries out scheduling of resource.

Communication means provided in an embodiment of the present invention, the first UE that the network equipment is communicated to D2D issue determining uplink hair Power parameter is penetrated, the uplink transmission power parameter that the first UE of D2D communication estimates and receives according to downlink path loss determines The transmission power of D2D communication is carried out, i.e., the first UE of middle D2D communication emits D2D number with maximum transmission power compared with the prior art According to the transmission power of D2D of embodiment of the present invention communication is determined using downlink path loss estimation, so that D2D is communicated The first UE D2D signal experience channel decline after reach the reception power of the network equipment and be not above the first UE and carry out The uplink signal of row communication reaches the reception power of the network equipment, it is ensured that the D2D signal of the first UE of D2D communication reaches net The reception power of network equipment is suitable with the uplink signal of other UE arrival reception power of the network equipment, can reduce or avoids Band internal leakage is interfered, and will not influence the reception of the uplink signal of other UE, and then can reduce D2D communication to the shadow of uplink communication It rings.

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

The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates, Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or The function of being specified in multiple boxes.

These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one The step of function of being specified in a box or multiple boxes.

Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as It selects embodiment and falls into all change and modification of the scope of the invention.

Obviously, those skilled in the art can carry out various modification and variations without departing from this hair to the embodiment of the present invention The spirit and scope of bright embodiment.In this way, if these modifications and variations of the embodiment of the present invention belong to the claims in the present invention And its within the scope of equivalent technologies, then the present invention is also intended to include these modifications and variations.

Claims

1. a kind of user terminal, which is characterized in that the user terminal includes: receiving unit, determination unit and transmitting unit, In,

The determination unit, for obtaining the uplink transmission power parameter of uplink, and according to the downlink path of downlink The hair of loss estimation, the received uplink transmission power parameter of the receiving unit and device-to-device D2D communication link Bandwidth is penetrated, determines uplink transmission power, and determines the transmission power of D2D communication link according to the uplink transmission power；

The transmission power of the transmitting unit, the D2D communication link for being determined according to the determination unit emits D2D number According to；

Wherein, the uplink is the communication link from the user terminal to the network equipment, and the downlink is from institute The network equipment is stated to the communication link of the user terminal, the D2D communication link is the user terminal and another user Communication link between terminal.

2. user terminal as described in claim 1, which is characterized in that the determination unit is specifically used for foundation as follows The uplink transmission power determines the transmission power of D2D communication link: by the uplink transmission power, it is logical to be determined as the D2D Believe the transmission power of link.

3. user terminal as described in claim 1, which is characterized in that the determination unit is specifically used for foundation as follows The uplink transmission power determines the transmission power of D2D communication link:

Determine power grade belonging to the uplink transmission power；And

According to the first corresponding relationship, the transmission power of the D2D communication link is determined, wherein first corresponding relationship is function Corresponding relationship between rate grade and the transmission power of D2D communication link.

4. user terminal as claimed in claim 3, which is characterized in that the determination unit is specifically used for determining as follows Power grade belonging to the uplink transmission power: determining the modulation format of D2D communication link, and determines that uplink transmission power exists Power grade belonging under the modulation format of the corresponding D2D communication link；And

The determination unit is specifically used for determining the transmission power of the D2D communication link as follows: according to the uplink Transmission power, the D2D communication link modulation format and each modulation format under power grade and D2D communication link hair The corresponding relationship between power is penetrated, determines the transmission power of D2D communication link.

5. user terminal as described in claim 1, which is characterized in that the determination unit is also used to: obtaining power bias Amount；

The determination unit is specifically used for determining the transmission power of the D2D communication link as follows:

Downlink path loss according to the uplink transmission power parameter, the transmitted bandwidth of D2D communication link, downlink is estimated And the power bias amount, determine the transmission power of D2D communication link；Or

According to the uplink transmission power parameter, the transmitted bandwidth of D2D communication link, the modulation format of D2D communication link, downlink The downlink path loss of link estimates and the power bias amount, determines the transmission power of D2D communication link.

6. user terminal as described in claim 1, which is characterized in that the determination unit is specifically used for determining as follows The transmission power of the D2D communication link:

According to the uplink transmission power parameter, according to the transmission power of the uplink transmission power parameter and D2D communication link The corresponding relationship of parameter determines the transmission power parameter of the corresponding D2D communication link of the uplink transmission power parameter, and foundation Transmission power parameter, the transmitted bandwidth of D2D communication link and the downlink path loss of downlink of determining D2D communication link Estimation, determines the transmission power of D2D communication link；Or

According to the uplink transmission power parameter, according to the transmission power of the uplink transmission power parameter and D2D communication link The corresponding relationship of parameter determines the transmission power parameter of the corresponding D2D communication link of the uplink transmission power parameter, and According to determine the transmission power parameter of D2D communication link, the transmitted bandwidth of D2D communication link, D2D communication link modulation lattice The estimation of the downlink path loss of formula and downlink, determines the transmission power of D2D communication link.

7. user terminal as claimed in any one of claims 1 to 6, which is characterized in that the determination unit is also used to: according to institute The transmission power for stating D2D communication link determines the number of transmissions or number of retransmissions；

The transmitting unit is specifically used for emitting D2D data as follows: being communicated according to determining the number of transmissions and the D2D The transmission power of link emits the D2D data；Or according to the determining number of retransmissions and the D2D communication link Transmission power emits the D2D data.

8. user terminal as claimed in claim 7, which is characterized in that the determination unit is specifically used for determining as follows The number of transmissions or number of retransmissions:

According to the second corresponding relationship, determine that the number of transmissions or number of retransmissions, second corresponding relationship are the hair of D2D communication link Penetrate the corresponding relationship between power and the number of transmissions, or pair between the transmission power and number of retransmissions of D2D communication link It should be related to.

9. user terminal as claimed in claim 7, which is characterized in that the transmitting unit is also used to:

Emit the number of transmissions information, the number of transmissions information is received for second user terminal according to the number of transmissions information Data, the second user terminal are that the terminal of D2D communication is carried out with the user terminal；Or

Emit number of retransmissions information, the number of retransmissions information is received for second user terminal according to the number of retransmissions information Data, the second user terminal are that the terminal of D2D communication is carried out with the user terminal.

10. user terminal as claimed in claim 9, which is characterized in that the transmitting unit is specifically used for sending out as follows Penetrate the number of transmissions information or number of retransmissions information:

11. a kind of network equipment, which is characterized in that the network equipment includes determination unit and issuance unit, wherein

The determination unit, for determining the uplink transmission power parameter and device-to-device D2D communication link of uplink Transmitted bandwidth；

The issuing unit, for issuing the uplink transmission power parameter and D2D communication that the determination unit determines The transmitted bandwidth of the transmitted bandwidth of link, the uplink transmission power parameter and the D2D communication link is used for D2D communication link The first user terminal according to the downlink path loss of downlink, the uplink transmission power parameter and the D2D communication chain The transmitted bandwidth on road determines the transmission power of D2D communication link；

Wherein, the uplink is the communication link from first user terminal to the network equipment, the downlink chain Road is the communication link from the network equipment to first user terminal, and the D2D communication link is first user Communication link between terminal and second user terminal.

12. the network equipment as claimed in claim 11, which is characterized in that the determination unit is also used to: determining power bias Amount；

The issuing unit is also used to: issuing the power bias amount；

Wherein, the power bias amount is damaged for first user terminal according to the power bias amount, the downlink path Consumption estimation and the uplink transmission power parameter, determine the transmission power of the D2D communication link.

13. the network equipment as claimed in claim 12, which is characterized in that under the issuing unit is specifically used for as follows Send out power bias amount described: using in broadcast mode, radio resource control RRC signaling method and physical layer signaling control mode At least one mode issues the power bias amount.

14. such as the described in any item network equipments of claim 11-13, which is characterized in that the determination unit is also used to: really Determine the modulation format of D2D communication link；

The issuing unit is also used to: issuing the modulation format of the D2D communication link；

Wherein, the modulation format of the D2D communication link is for first user terminal according to the tune of the D2D communication link Format, downlink path loss estimation and the uplink transmission power parameter processed, determine uplink transmission power.

15. a kind of communication means characterized by comprising

First user terminal of device-to-device D2D communication link obtains the uplink transmission power parameter of uplink；

First user terminal according to the downlink path loss of the uplink transmission power parameter, downlink estimate and The transmitted bandwidth of D2D communication link determines uplink transmission power, and determines D2D communication link according to the uplink transmission power Transmission power；And

First user terminal emits D2D data according to the transmission power of the D2D communication link；

Wherein, the uplink is the communication link from first user terminal to the network equipment, and the downlink is From the network equipment to the communication link of first user terminal, the D2D communication link is first user terminal With the communication link between second user terminal.

16. method as claimed in claim 15, which is characterized in that described to determine that D2D is communicated according to the uplink transmission power The transmission power of link, comprising:

The uplink transmission power is determined as the transmission power of the D2D communication link by first user terminal.

17. method as claimed in claim 15, which is characterized in that described to determine that D2D is communicated according to the uplink transmission power The transmission power of link, comprising:

First user terminal determines the transmission power of the D2D communication link according to the first corresponding relationship, described first pair The corresponding relationship that should be related between power grade and the transmission power of D2D communication link.

18. method as claimed in claim 17, which is characterized in that first user terminal determines the uplink transmission power Affiliated power grade, comprising:

First user terminal determines the modulation format of D2D communication link；

First user terminal is according to the uplink transmission power parameter of uplink, the transmitted bandwidth of D2D communication link, D2D The downlink path loss estimation of the modulation format and downlink of communication link, determines uplink transmission power, and determine on described Row transmission power power grade affiliated under the modulation format of the correspondence D2D communication link；

First user terminal determines the transmission power of D2D communication link according to the first corresponding relationship, comprising:

First user terminal is according to the uplink transmission power, the modulation format of the D2D communication link and respectively modulates lattice Corresponding relationship between power grade under formula and the transmission power of D2D communication link determines the transmitting function of D2D communication link Rate.

19. method as claimed in claim 15, which is characterized in that this method further include:

First user terminal obtains power bias amount；

First user terminal is communicated according to the uplink transmission power parameter, downlink path loss estimation and D2D The transmitted bandwidth of link determines the transmission power of D2D communication link, comprising:

First user terminal is according to the uplink transmission power parameter, the transmitted bandwidth of D2D communication link, downlink path damage Consumption estimation and the power bias amount, determine the transmission power of D2D communication link；Or

First user terminal is according to the uplink transmission power parameter, the transmitted bandwidth of D2D communication link, D2D communication chain The downlink path loss estimation and the power bias amount of the modulation format, downlink on road, determine the hair of D2D communication link Penetrate power.

20. method as claimed in claim 15, which is characterized in that the first user terminal is joined according to the uplink transmission power The transmitted bandwidth of several, the described downlink path loss estimation and D2D communication link, determines the transmission power of D2D communication link, wraps It includes:

First user terminal determines D2D communication chain according to the uplink transmission power parameter, according to preset corresponding relationship The transmission power parameter on road, and according to the transmission power parameter of determining D2D communication link, the transmitted bandwidth of D2D communication link Estimate with the downlink path loss of downlink, determines the transmission power of D2D communication link；Or

First user terminal determines D2D communication chain according to the uplink transmission power parameter, according to preset corresponding relationship The transmission power parameter on road, and according to the transmission power parameter of determining D2D communication link, D2D communication link transmitted bandwidth, The downlink path loss estimation of the modulation format and downlink of D2D communication link, determines the transmission power of D2D communication link.

21. such as the described in any item methods of claim 15 to 20, which is characterized in that first user terminal determines that D2D is logical After the transmission power for believing link, this method further include:

First user terminal determines the number of transmissions or number of retransmissions according to the transmission power of the D2D communication link；

First user terminal emits data according to the transmission power of the determining D2D communication link, comprising:

First user terminal emits D2D according to the transmission power of the determining the number of transmissions and the D2D communication link Data；Or

First user terminal emits D2D according to the transmission power of the determining number of retransmissions and the D2D communication link Data.

22. method as claimed in claim 21, which is characterized in that first user terminal is according to the D2D communication link Transmission power, determine the number of transmissions or number of retransmissions, comprising:

First user terminal determines the number of transmissions or number of retransmissions, second corresponding relationship according to the second corresponding relationship For the corresponding relationship between the transmission power and the number of transmissions of D2D communication link, or for D2D communication link transmission power with Corresponding relationship between number of retransmissions.

23. method as claimed in claim 21, which is characterized in that first user terminal determines the number of transmissions or retransmits secondary After number, this method further include:

First user terminal emits the number of transmissions information, and the number of transmissions information is for second user terminal according to The number of transmissions information receives data, and the second user terminal is that the terminal of D2D communication is carried out with first user terminal；Or Person

First user terminal emits number of retransmissions information, and the number of retransmissions information is for second user terminal according to Number of retransmissions information receives data, and the second user terminal is that the terminal of D2D communication is carried out with first user terminal.

24. method as claimed in claim 23, which is characterized in that first user terminal transmitting the number of transmissions information or again Pass number information, comprising:

First user terminal emits the number of transmissions information or number of retransmissions information in dispatch notice.

25. a kind of communication means characterized by comprising

The network equipment determines the uplink transmission power parameter of uplink and the transmitted bandwidth of device-to-device D2D communication link；

The network equipment issues the transmitted bandwidth of the uplink transmission power parameter and the D2D communication link, the uplink The transmitted bandwidth of transmission power parameter and the D2D communication link is used for the first user terminal of D2D communication link according to downlink The downlink path loss estimation of link, the transmitted bandwidth of the uplink transmission power parameter and the D2D communication link determine D2D The transmission power of communication link；

26. method as claimed in claim 25, which is characterized in that this method further include:

The network equipment is determining and issues power bias amount；

The power bias amount is estimated for first user terminal according to the power bias amount, the downlink path loss With the uplink transmission power parameter, the transmission power of D2D communication link is determined.

27. method as claimed in claim 26, which is characterized in that the network equipment issues power bias amount, comprising: described The network equipment uses in broadcast mode, radio resource control RRC signaling mode and physical layer signaling control mode at least A kind of mode issues the power bias amount.

28. such as the described in any item methods of claim 25 to 27, which is characterized in that this method further include:

The network equipment is determining and issues the modulation format of D2D communication link；

The modulation format of the D2D communication link is for first user terminal according to the modulation lattice of the D2D communication link Formula, downlink path loss estimation and the uplink transmission power parameter, determine uplink transmission power.

29. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage has computer journey Sequence, when the computer program is run on computers, so that the computer is executed as any in claim 15~24 Method described in one, or the computer is made to execute the method as described in any one of claim 25~28.

30. a kind of communication device, which is characterized in that read for being connected with memory including processor and execute the storage The program stored in device, to realize such as the described in any item methods of claim 15~24.

31. a kind of communication device, which is characterized in that read for being connected with memory including processor and execute the storage The program stored in device, to realize such as the described in any item methods of claim 25~28.

32. a kind of chip system, which is characterized in that the chip system includes:

Memory: for storing instruction；

Processor, for described instruction to be called and run from the memory, so that being equipped with the communication of the chip system Equipment executes the method as described in any one of claim 15~24, or the communication equipment is made to execute such as claim Method described in any one of 25~28.