CN104184540B

CN104184540B - Data transmission method and equipment in D2D communications

Info

Publication number: CN104184540B
Application number: CN201310195469.0A
Authority: CN
Inventors: 赵锐; 高秋彬; 陈文洪; 彭莹; 张然然
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2013-05-23
Filing date: 2013-05-23
Publication date: 2017-12-01
Anticipated expiration: 2033-05-23
Also published as: WO2014187336A1; TWI516161B; CN104184540A; TW201446069A

Abstract

Data transmission method and equipment in being communicated the embodiment of the invention discloses a kind of device-to-device D2D, are related to wireless communication field, for solving the problems, such as how each D2D terminals in same D2D communication sets utilize D2D communication resources progress data transmit-receive.In this programme, network side equipment receives the resource occupation request that at least one D2D terminals in same D2D communication sets are sent, determine the D2D communication resources corresponding to the D2D communication sets, asked according to the resource occupation received, determine resource location of the transfer resource of each D2D terminals in the D2D communication sets in the D2D communication resources, the resource location of the transfer resource of each D2D terminals is notified according to the notice on the transfer resource of the D2D terminals to be carried out data transmission to corresponding D2D terminals, D2D terminals.It can be seen that this programme solves the problems, such as how each D2D terminals utilize D2D communication resources progress data transmit-receive in same D2D communication sets.

Description

Data transmission method and equipment in D2D communications

Technical field

The present invention relates to the data transmission method in wireless communication field, more particularly to a kind of D2D communications and equipment.

Background technology

Device-to-device under cellular network control（Device-to-Device, D2D）（Alternatively referred to as terminal direct connection） Communication system, for convenience, the communication link defined between D2D terminals are referred to as D2D link（Device-to- device link）, the cellular communication link between network and D2D terminals is referred to as N2D link（Network-to-device link）, as shown in Figure 1.

For using up-link carrier in D2D data transmission procedures（FDD（Frequency division duplex, FDD）System）/ sub-frame of uplink（Time division duplex（Time division duplex, TDD）System）, or using descending carrier （FDD system）/ descending sub frame（TDD system）Consideration it is as follows：For descending sub frame/descending carrier, it may appear that following Situation, terminal（User Equipment, UE）The data transmitted on base station side N2D link should be received（Including at least under physics Row control channel（Physical Downlink Control Channel, PDCCH）Data）, while again in D2D links The transmission of enterprising row data, such UE needs to carry out transmitting-receiving conversion after PDCCH has been received, simultaneously for PDCCH demodulation For, it is necessary to receive the exclusive pilot signal of multiple row cell（Cell-specific reference signals, CRS）Solved Adjust, so as to obtain more preferable PDCCH demodulation performances, then in view of the time of transmitting-receiving conversion, in descending sub frame/descending carrier The OFDM Orthogonal Frequency Division Multiplexing transmitted available for D2D link, OFDM）Symbol is fewer.Therefore tend to use resource of the sub-frame of uplink/up-link carrier as D2D data transfers.

Under normal circumstances, for one group of D2D terminal, network side is semi-static to be used for for this group of D2D terminals configuration is shared D2D communicates（D2D link）Running time-frequency resource, it can be subframe（Time domain）+ Physical Resource Block（PRB）（Frequency domain）Configuration side Formula.

In traditional cellular telecommunication art, the data communication flow journey between two terminals is as shown in Figure 2.The language of two terminals The business such as sound and data is by each resident base station（eNB）And core net interacts.

D2D is that neighbouring terminal can be not required in short range by way of direct connected link carries out data transmission Pass through Centroid（That is base station）Forwarded, as shown in Figure 3.The short haul connection feature of D2D technologies in itself and directly lead to Letter mode makes it have following advantage：Terminal carrying out direct communication in close range mode can realize higher data rate, relatively low delay With relatively low power consumption；Utilize the short distance feature of user terminal widely distributed in network and D2D communication links, it is possible to achieve Effective utilization of frequency spectrum resource；D2D direct communication mode can adapt to the shared need of local data of such as wireless P2P business Ask, there is provided there are the data, services of flexible adaptation ability；D2D direct communications can utilize substantial amounts and widely distributed in network Communication terminal to expand the coverage of network.

To sum up, each D2D terminals belonged in same D2D communication sets how using the D2D communication resources carry out data transmit-receive, There is presently no concrete implementation scheme.

The content of the invention

The embodiment of the present invention provides data transmission method and equipment in a kind of D2D communications, for solving same D2D communications The problem of how each D2D terminals in group carry out data transmit-receive using the D2D communication resources.

A kind of data transmission method in device-to-device D2D communications, this method include：

Network side equipment is receiving the resource occupation of the transmission of at least one D2D terminals in same D2D communication sets every time After request, the D2D communication resources corresponding to the D2D communication sets are determined, are asked according to the resource occupation received, it is determined that described The resource location of the transfer resource of each D2D terminals in D2D communication sets, wherein the transfer resource of each D2D terminals is located at the D2D In the communication resource；The transfer resource includes sending resource and/or receives resource；

Network side equipment notifies the resource location of the transfer resource of each D2D terminals in the D2D communication sets to corresponding D2D terminals, carried out data transmission with D2D terminals corresponding to instruction on the transfer resource of notice.

D2D terminals receive the notice of the resource location of the transfer resource for the D2D terminals that network side equipment is sent；The D2D Terminal is a D2D terminal in D2D communication sets, and the notice is that network side equipment is being received in the D2D communication sets After the resource occupation request that at least one D2D terminals are sent, asked according to the resource occupation received in the D2D communication sets pair The notice of the resource location of the transfer resource of the D2D terminals determined in the D2D communication resources answered；The transfer resource includes hair Send resource and/or receive resource；

D2D terminals carry out data transmission according to the notice on the transfer resource of the D2D terminals.

A kind of base station, the base station include：

Resource determining unit, for receiving the money of the transmission of at least one D2D terminals in same D2D communication sets every time After source takes request, the D2D communication resources corresponding to the D2D communication sets are determined；

Position determination unit, for according to the resource occupation request received, determining each D2D in the D2D communication sets The resource location of the transfer resource of terminal, wherein the transfer resource of each D2D terminals is located in the D2D communication resources；The biography Defeated resource includes sending resource and/or receives resource；

Position informing unit, for the resource location of the transfer resource of each D2D terminals in the D2D communication sets to be notified To corresponding D2D terminals, carried out data transmission with D2D terminals corresponding to instruction on the transfer resource of notice.

A kind of D2D terminals, the D2D terminals include：

Position informing receiving unit, the resource-niche of the transfer resource of the D2D terminals for receiving network side equipment transmission The notice put；The D2D terminals are a D2D terminal in D2D communication sets, the notice be network side equipment receive it is described After the resource occupation request that at least one D2D terminals in D2D communication sets are sent, asked according to the resource occupation received in institute State the notice of the resource location of the transfer resource of the D2D terminals determined in the D2D communication resources corresponding to D2D communication sets；It is described Transfer resource includes sending resource and/or receives resource；

Data transmission unit, for being carried out data transmission according to the notice on the transfer resource of the D2D terminals.

In this programme, network side equipment is receiving the transmission of at least one D2D terminals in same D2D communication sets every time After resource occupation request, the D2D communication resources corresponding to the D2D communication sets are determined, are asked according to the resource occupation received, it is determined that Resource location of the transfer resource of each D2D terminals in the D2D communication sets in the D2D communication resources, by the biography of each D2D terminals The resource location of defeated resource notifies to receive the biography for the D2D terminals that network side equipment is sent to corresponding D2D terminals, D2D terminals After the notice of the resource location of defeated resource, carried out data transmission according to the notice on the transfer resource of the D2D terminals, including number According to transmission and/or data receiver.It can be seen that how each D2D terminals that this programme is solved in same D2D communication sets utilize D2D The communication resource carries out the problem of data transmit-receive.

Brief description of the drawings

Fig. 1 is N2D link of the prior art and D2D link schematic diagrames；

Fig. 2 is the data flow diagram that terminal communicates in cellular network of the prior art；

Fig. 3 is the data flow diagram of the direct-connected communication of terminal of the prior art；

Fig. 4 a are the semi-static unidirectional resources employment methods schematic diagram of the D2D communications in the embodiment of the present invention；

Fig. 4 b are the semi-static two-way resources employment methods schematic diagram of the D2D communications in the embodiment of the present invention；

Fig. 5 is method flow schematic diagram provided in an embodiment of the present invention；

Fig. 6 is another method schematic flow sheet provided in an embodiment of the present invention；

Fig. 7 is network side and the interaction flow schematic diagram of end side in the embodiment of the present invention；

Fig. 8 is architecture of base station schematic diagram provided in an embodiment of the present invention；

Fig. 9 is terminal structure schematic diagram provided in an embodiment of the present invention.

Embodiment

LTE D2D technologies refer to that being operated in LTE authorizes the D2D by LTE network control in frequency range to communicate.On the one hand can be with The advantage of D2D technologies is given full play to, while the control of LTE network can also overcome some problems of traditional D2D technologies, for example (,) it is dry Disturb uncontrollable etc..The introducing of LTE D2D characteristics will make LTE technologies from the simple wireless mobile cellular communication technology towards general company Connection technology（Universal Connectivity Technology）Direction evolution.

When D2D communications are incorporated on LTE authorized frequency bands, D2D communication links will share Radio Resource with cellular communication, This is also the most basic problem for merging the D2D communication technologys in the cellular system.The sharing mode of Radio Resource can be divided into two kinds： The shared and multiplex mode of orthogonal manner is shared.Refer to use in Radio Resource using orthogonal manner progress Radio Resource is shared On quadrature divide is carried out to Radio Resource in a manner of either statically or dynamically, cellular communication and D2D is communicated using mutually orthogonal Resource.Using multiplex mode to carry out, Radio Resource is shared to refer to D2D communications with reasonable manner to the cell resource that is used Shared reuse is carried out, and interference is limited in the range of certain level.

In D2D communication, in addition to the man-to-man communication mode between user, typical application scenarios also include Group/broadcast communication is carried out between D2D user, its mode realized can be as follows：

One UE sends identical data by single transmission to all UE in a communication group（Group communication）；

One UE sends identical data by single transmission to all neighbouring UE authorized（Broadcast communication）.

Fire-fighting, rescue and anti-terrorism that group/broadcast communication scene can be used in public safety applications etc..

Dispatch request（Scheduling Request, SR）For asking base station scheduling UE to carry out uplink, long-term Evolution（Long Term Evolution, LTE）/ long-term evolution upgrading（Long Term Evolution-Advanced, LTE- A）In system, base station is into wireless heterogeneous networks（Radio Resource Control, RRC）The UE configurations one of connection status Individual special periodic SR resources, its corresponding physical channel is Physical Uplink Control Channel（Physical Uplink Control Channel, PUCCH）Form（format）1/1a/1b resource.

Buffer state report（Buffer status Report, BSR）For reporting the caching of the current uplink of UE Area（buffer）In the size of data volume that includes, the distribution of resource during uplink for assisting base station scheduling UE.In matchmaker Body Access Control（Medium Access Control, MAC）Layer respectively defines two kinds of BSR, is respectively：Long BSR and short BSR, Wherein long BSR reports the buffer status informations of 4 logic channel groups, and short BSR only reports the BSR of a logic channel group.BSR To report triggered by event, such as：Can be the data arrival of high priority, or periodically BSR reports timing The events such as device time-out.BSR is carried by the PUSCH of base station scheduling.

From the point of view of D2D terminals transmit/receive, the configuration mode for the running time-frequency resource of D2D communications has following several：

Method 1：Unidirectional resource allocation method, for a given running time-frequency resource, it is configurable to D2D terminals hair The running time-frequency resource sent, or the running time-frequency resource of D2D terminals reception is configurable to, as shown in fig. 4 a.Unidirectional resource distribution can be with Modified by high-level signaling（The process reconfigured）.This method is a kind of semi-static resource allocation method, this side The benefit of method is simple, but the subject matter of this method is that the time delay reconfigured is bigger, it is impossible to adapts to the dynamic of business Change, so as to cause resource utilization than relatively low.

Method 2：Two-way resource allocation method, for a given running time-frequency resource, its be configured to D2D terminals send/ Shared running time-frequency resource is received, D2D terminals take current running time-frequency resource by way of competition on given running time-frequency resource. As shown in Figure 4 b.Can be reception and the send configuration identical running time-frequency resource of a pair/groups of D2D terminals, D2D terminals need working as The running time-frequency resource of preceding configuration is taken current running time-frequency resource by way of competition and carries out data transmission.The advantages of this mode is Resource utilization is high, multiple users to share identical running time-frequency resources, shortcoming be need to solve in each D2D subframes D2D terminals it Between resource occupation competition.

The application provides a kind of resource utilization that can improve system and avoids D2D terminals in each D2D subframes The data transmission method of resource contention.

Referring to Fig. 5, the data transmission method in the D2D communications that the embodiment of the present invention provides for network side, including it is following Step：

Step 50：Network side equipment is receiving the money of the transmission of at least one D2D terminals in same D2D communication sets every time After source takes request, the D2D communication resources corresponding to the D2D communication sets are determined, are asked according to the resource occupation received, it is determined that should The resource location of the transfer resource of each D2D terminals in D2D communication sets, leads to wherein the transfer resource of each D2D terminals is located at the D2D Believe in resource；The transfer resource includes sending resource and/or receives resource；Here, the D2D communication resources corresponding to D2D communication sets Refer to the D2D communication resources that all D2D terminals in the D2D communication sets are shared；

Step 51：Network side equipment by the resource location of the transfer resource of each D2D terminals in the D2D communication sets notify to Corresponding D2D terminals, carried out data transmission with D2D terminals corresponding to instruction on the transfer resource of notice.

Specifically, the resource occupation request that D2D terminals are sent can include：The D2D terminals configure in network side for itself The exclusive dispatch request for D2D links（SR）The SR sent in resource, the SR are used to represent that the D2D terminals are needed in D2D Link；Or the D2D terminals are sent out in the exclusive SR resources for D2D links of the network side for itself configuration The SR sent, the SR are used to represent that the D2D terminals are needed in D2D links, and the D2D terminals are dispatched in network side Physical Uplink Shared Channel（PUSCH）The buffer state report for D2D communications sent in resource（BSR）, BSR use In representing that the D2D terminals currently need the data volume transmitted on D2D links；Or the D2D terminals are dispatched in network side The BSR for D2D communications sent in PUSCH resources, the BSR are used to represent that the D2D terminals currently need to pass on D2D links Defeated data volume.

Here, network side is the exclusive SR resources for D2D links of D2D terminals configuration, and it is D2D terminals to refer to network side The resource for being only used for the D2D terminals and SR being sent by D2D links of configuration.

Network side needs to configure an exclusive SR resource to each D2D terminals in system.For the D2D in same group Terminal needs to configure different exclusive SR resources, so as to distinguish different D2D terminals.For the D2D terminals in different groups, The frequency domain position of its exclusive SR resource can be with identical or different, but time location needs difference.Exclusive SR resources can take Physical Uplink Control Channel（PUCCH）Form（format）1/1a/1b resource.

Specifically, network side equipment determines the D2D communication resources corresponding to the D2D communication sets in step 50, specific implementation can In a manner of using the following two kinds：

First, network side equipment will be pre-assigned to the communication resource of the D2D communication sets, be defined as the D2D communication sets pair The D2D communication resources answered；Here, performed in advance to the D2D communication sets distribution communication resource before step 50, it is more excellent , network side equipment can also notify the D2D communication resources corresponding to the D2D communication sets whole to each D2D in the D2D communication sets End.

Second, network side equipment D2D communication moneys according to corresponding to the resource occupation request received distributes the D2D communication sets Source, such as, network side equipment receives the resource occupation request that three D2D terminals are sent, and determines the D2D subframes in some cycles Number, by taking a radio frames as an example（By taking LTE system as an example, 10 subframes are included in a radio frames）If according to each The resource occupation request that D2D terminals are sent determines that needs distribute 2 for corresponding D2D terminals in a radio frames and are used to send The D2D subframes of data, then can be that the D2D communication sets distribute the D2D communication moneys for including 6 D2D subframes in a radio frames Source.Preferably, network side equipment can also notify the D2D communication resources corresponding to the D2D communication sets in the D2D communication sets Each D2D terminals.

In step 50, asked according to the resource occupation received, determine the transmission of each D2D terminals in the D2D communication sets The resource location of resource, can be specifically：Asked according to the resource occupation received, determine that each D2D in the D2D communication sets is whole Hold the resource location of the transfer resource in the minimum instruction cycle；Accordingly, in step 51 network side equipment by the D2D communication sets The resource location of the transfer resource of interior each D2D terminals is notified to corresponding D2D terminals, with D2D terminals corresponding to instruction logical Carry out data transmission on the transfer resource known, be implemented as：Network side equipment exists each D2D terminals in the D2D communication sets The resource location of transfer resource in one minimum instruction cycle is notified to corresponding D2D terminals, with D2D terminals corresponding to instruction Carry out data transmission in follow-up at least one minimum change cycle on the transfer resource of notice instruction；Wherein each most The minor change cycle includes L minimum instruction cycle, and L is the integer not less than 1.

Preferably, each minimum instruction cycle includes M subframe, M1 D2D subframe is included in the M subframe, its Middle M is the integer more than 1, and M1 is the integer not less than 1.Preferably, M can be the subframe included in the radio frames of LTE system The integral multiple of number（Equivalent to the integral multiple of 10 subframes）.

Wherein, what minimum change cycle represented be D2D terminals at least in a minimum change cycle its communicate and provide in D2D The position of transfer resource in source is constant.Can be N number of subframe on its time, wherein N1 D2D can be included in N number of subframe Frame.

What the minimum instruction cycle represented is the week of the pattern of the transfer resource in the D2D communication resources that network side signaling indicates Phase, it can include M subframe in time, and M1 D2D subframe can be included wherein in M subframe.

Minimum change cycle and the relation in minimum instruction cycle are：L minimum can be included in one minimum change cycle The cycle is indicated, wherein L is the integer more than or equal to 1, corresponding minimum change cycle N=L*M, can be by any in N, L and M The value of two parameters obtains the value of another parameter, and the value of two parameters of any of which can pass through protocol conventions Or the mode of high-level signaling configuration obtains.

Specifically, network side equipment can make an appointment with each D2D terminals in minimum change cycle, minimum instruction cycle, L The value of at least two parameters；Or

Network side equipment in advance by the value of at least two parameters in minimum change cycle, minimum instruction cycle, L notify to Each D2D terminals；Or

Network side equipment and each D2D terminals are made an appointment in minimum change cycle, minimum instruction cycle, L parameter Value, and in advance notify the value of remaining at least one parameter to each D2D terminals.

Such as：

One minimum instruction cycle is the length 10ms of a radio frames（10 subframes）, wherein subframe 4 and subframe 8 be D2D subframes, then if corresponding L is 2, then minimum change cycle is 20ms（20 subframes）, corresponding minimum instruction week The number of interim D2D subframes is 2, and the number of the D2D subframes in minimum change cycle is 2*2=4.

When network side equipment notifies the resource location of transfer resource to corresponding D2D terminals, may be used also in the notice Represent that positive integer K, the D2D terminal of notice effective time is notified into line number in K minimum instruction cycle according to this to carry According to transmission, the notice fails after K minimum instruction end cycle, i.e., does not carry out data transmission according still further to the notice.In network When in the notice of the resource location for the transfer resource that side apparatus is sent without K is carried, D2D terminals can be carried out according to the notice always Data transfer, after receiving new notice, data biography is carried out according to new notice since next minimum change cycle It is defeated.

Can also be in the following way：The resource location of transfer resource was notified to corresponding D2D ends in network side equipment During end, positive integer K, the D2D terminal for representing the notice effective time can also be carried in the notice K*L minimum instruction week Interim to carry out data transmission according to the notice, the notice fails after K*L minimum instruction end cycle, i.e., illogical according still further to this Know and carry out data transmission.When in the notice of the resource location for the transfer resource that network side equipment is sent without K is carried, D2D is whole End can carry out data transmission according to the notice always, after receiving new notice, since next minimum change cycle Carry out data transmission according to new notice.When L is equal to 1, mode as above.

Specifically, network side equipment is asked according to the resource occupation received, determine that each D2D in the D2D communication sets is whole The resource location of the transfer resource in a minimum instruction cycle is held, specific implementation can be as follows：

For each D2D terminals in the D2D communication sets, it is somebody's turn to do according to the resource occupation request received from set in advance A variety of transfer resources corresponding to D2D terminals（Including sending resource and/or receiving resource）Pattern in choose a kind of pattern, and press The resource location of the transfer resource of the D2D terminals is determined according to the pattern, wherein the pattern of every kind of transfer resource is to indicate one most Each D2D subframes in the small instruction cycle are as the pattern for sending resource or reception resource.

For example, illustrated so that the minimum instruction cycle includes 4 D2D subframes as an example, for a pair of D2D terminals, one The pattern of transfer resource in the individual minimum instruction cycle may refer to such as table 1 below：

Table 1

In table 1, " 1 " represents corresponding subframe to send subframe, and " 0 " represents corresponding subframe to receive subframe.

Further, network side equipment it is determined that each D2D terminals transfer resource resource location when, can press first The position of the fixed resource for D2D terminals progress data transmission and/or reception is determined according to preset rules, then according to reception The resource occupation request arrived determines the position for being used for the on-fixed resource that the D2D terminals carry out data transmission or reception.

It is above-mentioned to determine to be fixed for the D2D subframes of the progress data transmission of D2D terminals or reception according to preset rules, specifically may be used To be determined according to the identification information of D2D terminals, such as by taking a pair of D2D terminals as an example, can be determined according to UE1 identification information The position of UE1 transmission resource, such as according to formula：mod（UE_ID_1, M1）, determine the position of UE1 transmission resource；According to UE2 identification information determines the position of UE1 reception resource, such as according to formula：mod（UE_ID_2, M1）Determine connecing for UE1 Receive the position of resource；Wherein M1 is the number of the D2D subframes in the minimum instruction cycle.

The number for the D2D subframes that network side can also include according to the number of D2D terminals and a minimum instruction cycle It is determined that it is fixed for the D2D subframes that D2D terminals carry out data transmission or reception.For example some D2D subframes are consolidated in predefined pattern Surely it is the position for receiving resource or sending resource.

Still it is illustrated with upper table 1：For a pair of D2D terminals, if the D2D link minimum instruction cycle Comprising 4 D2D subframes, wherein D2D UE1 can be fixed in D2D subframes 1 and send data, be fixed in D2D subframes 3 and receive number According to wherein D2D UE2 can be fixed in D2D subframes 1 and receive data, are fixed in D2D subframes 3 and send data, for D2D The request for the resource occupation that frame 2 and 4 can be sent according to two D2D terminals determine its be arranged to D2D UE1 transmission resource/ Resource is received, or is configured to D2D UE2 transmission resource/reception resource.

Further, the resource location of the transfer resource of each D2D terminals in the D2D communication sets is led in network side equipment When knowing to corresponding D2D terminals, when network side equipment can also carry out data transmission each D2D terminals in the D2D communication sets The information of the transmission plan of use is notified to corresponding D2D terminals.The transmission plan can be including Modulation and Coding Scheme etc..

In step 51, network side equipment notifies the resource location of the transfer resource of each D2D terminals in the D2D communication sets To corresponding D2D terminals, specific implementation can use the following two kinds mode：

First, individually instruction, i.e. each D2D terminal of the network side equipment into the D2D communication sets send one respectively Indication signaling, the information of the resource location of the transfer resource of corresponding D2D terminals is carried in every indication signaling；Which can fit For carrying out a pair of D2D terminals of D2D communications, or the fewer situation of number of D2D terminals；

Second, each D2D terminals of joint instructions, i.e. network side equipment into the D2D communication sets send an indication signaling, The information of the resource location of the transfer resource of each D2D terminals is carried in the indication signaling.Which goes for carrying out D2D A pair of D2D terminals of communication, or the more situation of number of D2D terminals.

When using joint instructions mode, the following two kinds method can be specifically used：

First, the information of the resource location of the transfer resource of each D2D terminals is cascaded up in indication signaling, D2D Corresponding relation between the information of the resource location of terminal and transfer resource is obtained by other advance configuration informations；

Second, the resource location of identification information transfer resource corresponding with its comprising each D2D terminals in indication signaling Information.

Wherein it is possible to the information of the resource location of the transfer resource of some D2D terminal is represented using the following two kinds mode：

First, using bit map（bitmap）Mode indicate that each D2D subframes are to send in a minimum instruction cycle Resource or reception resource, such as " 1 " represent to send resource, " 0 " expression reception resource.

Second, pass through the index of the pattern of transfer resource in one that indicates to choose minimum instruction cycle（index）Information, Each D2D subframes to indicate in the pattern are to send resource or receive resource.Need in advance to provide each transmission using this method Each D2D subframes are the information notices for sending resource or receiving resource in the index information of the pattern in source and its corresponding pattern Give D2D terminals.

Network side equipment send indication signaling can be specifically：

Layer 1（L1）Control signaling：The DCI carried by PDCCH；It can cause what is sent to not increase blind check number DCI bit length is identical with a kind of bit length of DCI format in existing DCI format, such as：DCI format0/1a Bit length, idle bit fills out 0；Or

Layer 2（L2）Control signaling：The medium education carried by PDSCH（MAC）Control unit（CE）；Or

RRC signaling：The high-level signaling carried by PDSCH.

Specifically, each D2D terminals in network side equipment D2D communication sets send one and carry the D2D terminals respectively During the indication signaling of the positional information of transfer resource：

Network side equipment passes through the special D2D wireless networks of the D2D terminals for each D2D terminals in D2D communication sets Temporary mark（D2D-RNTI）The Physical Downlink Control Channel (PDCCH) of determination or the Physical Downlink Control Channel (E- of enhancing PDCCH search space), the Downlink Control Information of a use special D2D-RNTI scramblings is sent to the D2D terminals （DCI）, the information of the resource location of the transfer resource of the D2D terminals is carried in the DCI；The search space is searched for for user-specific Space or public search space；Or

Network side equipment is true by the special D2D-RNTI of the D2D terminals for each D2D terminals in D2D communication sets Fixed PDCCH or E-PDCCH user-specific search space, send the use special D2D-RNTI to the D2D terminals and add The DCI disturbed, pass through Physical Downlink Shared Channel to dispatch the D2D terminals（PDSCH）Receive the money for sending resource and receiving resource The information of source position；Send the transmission resource of the D2D terminals to the D2D terminals by PDSCH according to scheduling result and receive and provide The information of the resource location in source.

Each D2D terminal of the network side equipment into D2D communication sets sends an indication signaling, is carried in the indication signaling During the information of the resource location of the transfer resource of each D2D terminals：

Network side equipment is by PDCCH or E-PDCCH public search space, or each D2D passed through in D2D communication sets whole The PDCCH or E-PDCCH search space that the shared D2D-RNTI in end is determined, send the use shared D2D-RNTI and add The information of the transfer resource position of each D2D terminals in D2D communication sets is carried in the DCI disturbed, the DCI；The search space is use The exclusive search space in family or public search space；Or

Network side equipment is empty by PDCCH or E-PDCCH common search for each D2D terminals in D2D communication sets Between, or the search space by the shared D2D-RNTI of each D2D terminals in the D2D communication sets PDCCH determined or E-PDCCH, The DCI of a use shared D2D-RNTI scramblings is sent to the D2D terminals, is received with dispatching the D2D terminals by PDSCH The information of the resource location of transfer resource；The letter of the transfer resource of each D2D terminals is sent by PDSCH according to scheduling result Breath；The search space is user-specific search space or public search space.

Preferably, network side equipment can also notify the D2D communication resources corresponding to D2D communication sets in D2D communication sets Each D2D terminals.

Referring to Fig. 6, the data transmission method in the D2D communications that the embodiment of the present invention provides for end side, including it is following Step：

Step 60：D2D terminals receive the logical of the resource location of the transfer resource for the D2D terminals that network side equipment is sent Know；The D2D terminals are a D2D terminal in D2D communication sets, and the notice is that network side equipment is receiving the D2D communication sets After the resource occupation request that interior at least one D2D terminals are sent, asked according to the resource occupation received in the D2D communication sets The notice of the resource location of the transfer resource of the D2D terminals determined in the corresponding D2D communication resources；The transfer resource includes hair Send resource and/or receive resource；The D2D communication resources corresponding to D2D communication sets refer to all D2D terminals in the D2D communication sets The shared D2D communication resources；D2D terminals can be according to corresponding to the configuration information that network side equipment issues determines D2D communication sets The D2D communication resources；The D2D terminals of two or more quantity can be included in the D2D communication sets；

Step 61：D2D terminals carry out data transmission according to the notice received on the transfer resource of the D2D terminals, tool Body, when the notice received includes sending the resource location information of resource, to other D2D terminals in the transmission resource Data are sent, when the notice received includes receiving the resource location information of resource, other are received in the reception resource The data that D2D terminals are sent.

Further, before step 60, D2D terminals can send resource occupation request to network side equipment.

Received specifically, the notice that D2D terminals receive in step 60 is the D2D terminals in current minimum change cycle Last instruction minimum instruction cycle in transfer resource resource location notice；Accordingly, D2D terminals in step 61 Carried out data transmission according to the notice on the transfer resource of the D2D terminals, be implemented as：D2D terminals for it is follow-up extremely A few minimum change cycle, carry out data transmission on the transfer resource of the notice instruction；Wherein each minimum change week Phase includes L minimum instruction cycle, and L is the integer not less than 1.Here, received in D2D terminals in current minimum change cycle To the resource location of the transfer resource in an instruction minimum instruction cycle notice when, D2D terminals are follow-up at least one The transfer resource indicated in minimum change cycle according to the notice carries out data transmission；In D2D terminals in current minimum change week When the notice of the resource location of the transfer resource in multiple instructions minimum instruction cycle is received in the phase, D2D terminals are follow-up In at least one minimum change cycle, carry out data transmission according to the transfer resource of last notice instruction.

Specifically, each minimum instruction cycle includes M subframe, M1 D2D subframe is included in the M subframe, its Middle M is the integer more than 1, and M1 is the integer not less than 1.Preferably, M is the number of sub-frames included in the radio frames of LTE system Integral multiple（Equivalent to the integral multiple of 10 subframes）.

Specifically, D2D terminals can make an appointment with network side equipment in minimum change cycle, minimum instruction cycle, L extremely The value of few two parameters；Or

D2D terminals receive minimum change cycle, the minimum that network side equipment is sent in advance and indicated at least two in cycle, L The value of parameter；Or

D2D terminals and network side equipment are made an appointment in minimum change cycle, minimum instruction cycle, L the taking of parameter Value, receive the value for remaining at least one parameter that network side equipment is sent in advance.

It can also be carried in the notice of the resource location for the transfer resource that D2D terminals receive and represent the notice effective time Positive integer K, D2D terminal carry out data transmission in K minimum instruction cycle according to the notice, minimum indicate the cycle at K The notice comes into force after end, i.e., does not carry out data transmission according still further to the notice.When in the notice without K is carried, D2D terminal meetings Carry out data transmission always according to the notice, after receiving new notice, since next minimum change cycle according to New notice carries out data transmission.

Can also be in the following way：It can also be taken in the notice of the resource location for the transfer resource that D2D terminals receive With positive integer K, the D2D terminal for representing the notice effective time data are carried out in K*L minimum instruction cycle according to the notice Transmission, the notice comes into force after K*L minimum instruction end cycle, i.e., does not carry out data transmission according still further to the notice.It is logical at this When in knowing without K is carried, D2D terminals can carry out data transmission according to the notice always, after receiving new notice, under One minimum change cycle starts to carry out data transmission according to new notice.When L is equal to 1, mode as above.

Preferably, used when also carrying out data transmission in the notice that D2D terminals receive in step 60 including the D2D terminals Transmission plan information；Accordingly, D2D terminals using the transmission plan of notice, provide in the transmission of the D2D terminals in step 61 Carry out data transmission on source.The transmission plan can be including Modulation and Coding Scheme etc..

Further, after D2D terminals receive the notice, D2D terminals receive being somebody's turn to do for network side equipment transmission again The notice of the resource location of the transfer resource of D2D terminals；D2D terminals are since follow-up minimum change cycle in newest notice Carry out data transmission on transfer resource.

In step 60, D2D terminals receive the logical of the resource location of the transfer resource for the D2D terminals that network side equipment is sent Know, specific implementation can use the following two kinds mode：

First, D2D terminal receive network side equipment and are directed to the indication signaling that the D2D terminals are sent, and are taken in the indication signaling The information of the resource location of transfer resource with the D2D terminals；

Second, D2D terminal receive the indication signaling that network side equipment is sent for each D2D terminals in the D2D communication sets, The information of the resource location of the transfer resource of each D2D terminals is carried in the indication signaling.

Network side equipment send indication signaling can be specifically：

RRC signaling：The high-level signaling carried by PDSCH.

Specifically, when D2D terminals receive the indication signaling that network side equipment is sent for the D2D terminals, it is specific as follows：

D2D terminals are in the special D2D-RNTI of the D2D terminals PDCCH determined or the E-PDCCH of enhancing search space In, the DCI using the special D2D-RNTI scramblings is received, the positional information of the transfer resource of the D2D terminals is carried in the DCI； The search space is user-specific search space or public search space；Or

D2D terminals are searched for empty in the special D2D-RNTI of the D2D terminals PDCCH determined or E-PDCCH user-specific Between in, receive the DCI using special D2D-RNTI scrambling, network side is obtained from the DCI dispatch the D2D terminals and pass through PDSCH receives the dispatch of resource location information；The transmission for receiving the D2D terminals on PDSCH according to the dispatch provides The information of the resource location in source.

When D2D terminals receive the indication signaling that network side equipment is sent for each D2D terminals in D2D communication sets, tool Body is as follows：

D2D terminals are in PDCCH or E-PDCCH public search space, or each D2D terminals in D2D communication sets are total to In PDCCH that D2D-RNTI is determined or E-PDCCH search space, receiving the use that network side equipment sends, this is shared The letter of the resource location of the transfer resource of each D2D terminals in D2D communication sets is carried in the DCI of D2D-RNTI scramblings, the DCI Breath；The search space is user-specific search space or public search space；Or

D2D terminals are in PDCCH or E-PDCCH public search space, or each D2D terminals in D2D communication sets are total to In PDCCH that D2D-RNTI is determined or E-PDCCH search space, receiving the use that network side equipment sends, this is shared The DCI of D2D-RNTI scramblings, network side is obtained from the DCI dispatches the D2D terminals and passes through PDSCH and receive resource location information Dispatch；The information of the resource location of the transfer resource of each D2D terminals is received on PDSCH according to the dispatch；This is searched Rope space is user-specific search space or public search space.

Network side equipment in the present invention can be base station, via node（RN）Etc. equipment.As shown in fig. 7, base station and D2D The interaction flow of terminal is as follows：

Step 1：At least one D2D terminals in D2D communication sets（Such as D2D terminal A and D2D terminals B）Sent to base station Resource occupation is asked；

Step 2：After base station receives the resource occupation request of D2D terminals transmission, D2D corresponding to the D2D communication sets is determined The communication resource（Such as three D2D subframes in Fig. 7）, asked, determined each in D2D communication sets according to the resource occupation received The resource location of the transfer resource of D2D terminals, such as, the first two D2D subframes that base station includes the D2D communication resources in Fig. 7 are true It is set to D2D terminals A transmission resource, the latter D2D subframes are defined as D2D terminals A reception resource, while D2D is communicated and provided The first two D2D subframes that source includes are defined as D2D terminals B reception resource, and the latter D2D subframes are defined as D2D terminals B hair Send resource；

Base station notifies the resource location of the transfer resource of each D2D terminals in D2D communication sets to corresponding D2D terminals, For example by the indication signaling of resource distribution, the first two D2D subframes that the D2D communication resources are included are transmission money for base station in Fig. 7 Source, the latter D2D subframes are sent to D2D terminal A, the first two that the D2D communication resources are included to receive the configured information of resource D2D subframes are reception resource, the latter D2D subframes are that the configured information for sending resource is sent to D2D terminals B；

Step 3：After D2D terminals A receives the indication signaling of resource distribution, communicated in M minimum change cycles in D2D To the number that D2D terminals B sends data, reception D2D terminals B is sent in the latter D2D subframes in the first two D2D subframes of resource According to；

After D2D terminals B receives the indication signaling of resource distribution, in the D2D communication resources in M minimum change cycles The data of D2D terminals A transmissions are received in the first two D2D subframes, send data to D2D terminals A in the latter D2D subframes；

Step 4：At least one D2D terminals in D2D communication sets（Such as D2D terminal A and D2D terminals B）Again to base station Send resource occupation request；

Step 5：After base station receives the resource occupation request that D2D terminals are sent again, the D2D communication sets pair are redefined The D2D communication resources answered（Such as three D2D subframes in Fig. 7）, asked according to the resource occupation received, redefine D2D and lead to The resource location of the transfer resource of each D2D terminals in letter group, such as, base station includes the D2D communication resources previous in Fig. 7 D2D subframes are defined as D2D terminals A transmission resource, and latter two D2D subframe is defined as D2D terminals A reception resource, simultaneously will The previous D2D subframes that the D2D communication resources include are defined as D2D terminals B reception resource, and latter two D2D subframe is defined as D2D Terminal B transmission resource；

Base station notifies the resource location of the transfer resource of each D2D terminals in the D2D communication sets redefined to corresponding D2D terminals, such as, base station is by the indication signaling of resource distribution in Fig. 7, previous D2D that the D2D communication resources are included Frame is transmission resource, latter two D2D subframe is that the configured information for receiving resource is sent to D2D terminal A, by D2D communication resource bags The previous D2D subframes contained are reception resource, latter two D2D subframe is that the configured information for sending resource is sent to D2D terminals B；

Step 6：After D2D terminals A receives the indication signaling of resource distribution again, opened from M+1 minimum change cycles In the N number of minimum change cycle to begin data are sent in the previous D2D subframes of the D2D communication resources, rear two to D2D terminals B The data that D2D terminals B is sent are received in individual D2D subframes；

It is N number of since M+1 minimum change cycles after D2D terminals B receives the indication signaling of resource distribution again The data of D2D terminals A transmissions are received in minimum change cycle in the previous D2D subframes of the D2D communication resources, at latter two In D2D subframes data are sent to D2D terminals A.

Referring to Fig. 8, the embodiment of the present invention provides a kind of base station, and the base station includes：

Resource determining unit 81, for receiving the transmission of at least one D2D terminals in same D2D communication sets every time After resource occupation request, the D2D communication resources corresponding to the D2D communication sets are determined；

Position determination unit 82, for according to the resource occupation request received, determining each in the D2D communication sets The resource location of the transfer resource of D2D terminals, wherein the transfer resource of each D2D terminals is located in the D2D communication resources；It is described Transfer resource includes sending resource and/or receives resource；

Position informing unit 83, for the resource location of the transfer resource of each D2D terminals in the D2D communication sets to be led to Know to corresponding D2D terminals, carried out data transmission with D2D terminals corresponding to instruction on the transfer resource of notice.

Further, the resource determining unit 81 is used for：

The communication resource of the D2D communication sets will be pre-assigned to, be defined as D2D corresponding to the D2D communication sets and communicates Resource；Or

According to the D2D communication resources corresponding to the resource occupation request distribution D2D communication sets received.

Further, the resource occupation request that each D2D terminals that the resource determining unit 81 receives are sent includes：

What the D2D terminals were sent in the exclusive dispatch request SR resources for D2D links of the network side for itself configuration SR, the SR are used to represent that the D2D terminals are needed in D2D links；And/or

What the D2D terminals were sent in the Physical Uplink Shared Channel PUSCH resources that network side is dispatched is directed to D2D communications Buffer state report BSR, the BSR are used to represent that the D2D terminals currently need the data volume transmitted on D2D links.

Further, the position determination unit 82 is used for：

Asked according to the resource occupation received, determine that each D2D terminals in the D2D communication sets indicate the cycle in minimum In transfer resource resource location；

The position informing unit 83 is used for：

The resource location of transfer resource of each D2D terminals in the D2D communication sets in the minimum instruction cycle is notified To corresponding D2D terminals, referred to D2D terminals corresponding to instruction in follow-up at least one minimum change cycle in the notice Carry out data transmission on the transfer resource shown；Wherein each minimum change cycle includes L minimum instruction cycle, and L is not less than 1 Integer.

Further, each minimum instruction cycle includes M subframe, and M1 D2D subframe is included in the M subframe, Wherein M is the integer more than 1, and M1 is the integer not less than 1.

Further, M is the integral multiple of the number of sub-frames included in the radio frames of Long Term Evolution LTE system.

Further, the base station also includes：

Parameter determination unit 84, for being made an appointment with each D2D terminals in minimum change cycle, minimum instruction cycle, L extremely The value of few two parameters；Or

The value of at least two parameters in minimum change cycle, minimum instruction cycle, L is notified to each D2D terminals in advance； Or

The value for the parameter in minimum change cycle, minimum instruction cycle, L of being made an appointment with each D2D terminals, and in advance The value of remaining at least one parameter is notified to each D2D terminals.

Further, the position determination unit 82 is used for：

For each D2D terminals in the D2D communication sets, it is somebody's turn to do according to the resource occupation request received from set in advance A kind of pattern is chosen in the pattern of a variety of transfer resources corresponding to D2D terminals, and the transmission of the D2D terminals is determined according to the pattern The resource location of resource, provided wherein the pattern of every kind of transfer resource is a minimum D2D subframe indicated in the cycle as transmission Source or the pattern for receiving resource.

Further, the position determination unit 82 is used for：

It is determined that each D2D terminals transfer resource resource location when, determine to be used for the D2D terminals according to preset rules The position of the fixed resource of data transmission or reception is carried out, and determines to be used for D2D ends according to the resource occupation request received End carries out the position of the on-fixed resource of data transmission or reception.

Further, the position informing unit 83 is additionally operable to：

The resource location of the transfer resource of each D2D terminals in by the D2D communication sets is notified to corresponding D2D terminals When, the information of the transmission plan used when each D2D terminals in the D2D communication sets are carried out data transmission is notified to corresponding D2D terminals.

Further, the position informing unit 83 is used for：

Each D2D terminals into the D2D communication sets send an indication signaling respectively, are carried in every indication signaling The information of the resource location of the transfer resource of corresponding D2D terminals；Or

Each D2D terminals into the D2D communication sets send an indication signaling, and each D2D is carried in the indication signaling The information of the resource location of the transfer resource of terminal.

Referring to Fig. 9, the embodiment of the present invention provides a kind of D2D terminals, and the D2D terminals include：

Position informing receiving unit 90, the resource of the transfer resource of the D2D terminals for receiving network side equipment transmission The notice of position；The D2D terminals are a D2D terminal in D2D communication sets, and the notice is network side equipment receiving After stating the resource occupation request that at least one D2D terminals in D2D communication sets are sent, existed according to the resource occupation request received The notice of the resource location of the transfer resource of the D2D terminals determined in the D2D communication resources corresponding to the D2D communication sets；Institute Stating transfer resource includes sending resource and/or receives resource；

Data transmission unit 91, for being carried out data transmission according to the notice on the transfer resource of the D2D terminals.

Further, the D2D terminals also include：

Request transmitting unit 92, for before the notice is received, resource occupation request to be sent to network side equipment.

Further, the resource occupation request that the request transmitting unit 92 is sent includes：

The SR that D2D terminals are sent in the exclusive dispatch request SR resources for D2D links of the network side for itself configuration, The SR is used to represent that the D2D terminals are needed in D2D links；And/or

The delaying for D2D communications that D2D terminals are sent in the Physical Uplink Shared Channel PUSCH resources that network side is dispatched Zone state report BSR, the BSR are deposited for representing that the D2D terminals currently need the data volume transmitted on D2D links.

Further, the notice that the position informing receiving unit 90 receives is the D2D terminals in current minimum change The notice of the resource location of transfer resource in last instruction minimum instruction cycle that cycle receives；

The data transmission unit 91 is used for：

For follow-up at least one minimum change cycle, passed in the enterprising row data of transfer resource of the notice instruction It is defeated；Wherein each minimum change cycle includes L minimum instruction cycle, and L is the integer not less than 1.

Further, the D2D terminals also include：

Parameter determination unit 93, for being made an appointment with network side equipment in minimum change cycle, minimum instruction cycle, L The value of at least two parameters；Or

Receive taking at least two parameters in the minimum change cycle, minimum instruction cycle, L that network side equipment sends in advance Value；Or

The value for the parameter in minimum change cycle, minimum instruction cycle, L of being made an appointment with network side equipment, is received The value for remaining at least one parameter that network side equipment is sent in advance.

Further, the D2D terminals are also included in the notice that the position informing receiving unit 90 receives and carry out data The information of the transmission plan used during transmission；

The data transmission unit 91 is used for：

Using the transmission plan of notice, carry out data transmission on the transfer resource of the D2D terminals.

Further, the position informing receiving unit 90 is additionally operable to：It is whole that the D2D that network side equipment is sent is received again The notice of the resource location of the transfer resource at end；

The data transmission unit 91 is additionally operable to：In the transfer resource of newest notice since follow-up minimum change cycle On carry out data transmission.

Further, the position informing receiving unit 90 is used for：

Receive network side equipment and be directed to the indication signaling that the D2D terminals are sent, the D2D terminals are carried in the indication signaling The information of the resource location of transfer resource；Or

Receive the indication signaling that network side equipment is sent for each D2D terminals in the D2D communication sets, the indication signaling The information of the resource location of the middle transfer resource for carrying each D2D terminals.

To sum up, beneficial effects of the present invention include：

In scheme provided in an embodiment of the present invention, network side equipment is receiving in same D2D communication sets at least every time After the resource occupation request that one D2D terminal is sent, the D2D communication resources corresponding to the D2D communication sets are determined, according to what is received Resource occupation is asked, and determines resource-niche of the transfer resource of each D2D terminals in the D2D communication sets in the D2D communication resources Put, the resource location of the transfer resource of each D2D terminals is notified that, to corresponding D2D terminals, D2D terminals receive network side equipment hair It is enterprising in the transfer resource of the D2D terminals according to the notice after the notice of the resource location of the transfer resource for the D2D terminals sent Row data transfer, including data are sent and/or data receiver.It can be seen that this programme solve it is each in same D2D communication sets The problem of how D2D terminals carry out data transmit-receive using the D2D communication resources；Also, in this programme, network side equipment is according to reception To resource occupation request be that the business of D2D terminals needs to be each D2D terminals in D2D communication sets in the D2D communication resources point With transfer resource, including send resource and/or receive resource, so as to improve the resource utilization of system, and by network side Equipment is unified for each D2D terminal distributions transfer resource, and multiple D2D terminals can be avoided to be asked in the resource contention of each D2D subframes Topic.

The present invention is with reference to method according to embodiments of the present invention, equipment（System）And the flow of computer program product Figure and/or block diagram describe.It should be understood that can be by every first-class in computer program instructions implementation process figure and/or block diagram Journey and/or the flow in square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided The processors of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce A raw machine so that produced by the instruction of computer or the computing device of other programmable data processing devices for real The device for the function of being specified in present one flow of flow chart or one square frame of multiple flows and/or block diagram or multiple square frames.

These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory, which produces, to be included referring to Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one square frame of block diagram or The function of being specified in multiple square frames.

These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, so as in computer or The instruction performed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one The step of function of being specified in individual square frame or multiple square frames.

Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation Property concept, then can make other change and modification to these embodiments.So appended claims be intended to be construed to include it is excellent Select embodiment and fall into having altered and changing for the scope of the invention.

Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to comprising including these changes and modification.

Claims

1. the data transmission method in a kind of device-to-device D2D communications, it is characterised in that this method includes：

Network side equipment is receiving the resource occupation request of the transmission of at least one D2D terminals in same D2D communication sets every time Afterwards, the D2D communication resources corresponding to the D2D communication sets are determined, is asked according to the resource occupation received, determines that the D2D leads to The resource location of the transfer resource of each D2D terminals in letter group, wherein the transfer resource of each D2D terminals is located at D2D communications In resource；The transfer resource includes sending resource and/or receives resource；

Network side equipment notifies the resource location of the transfer resource of each D2D terminals in the D2D communication sets to corresponding D2D Terminal, carried out data transmission with D2D terminals corresponding to instruction on the transfer resource of notice；

Wherein, the resource occupation request that the basis receives, the transmission money of each D2D terminals in the D2D communication sets is determined The resource location in source, is specifically included：

Asked according to the resource occupation received, determine each D2D terminals in the D2D communication sets in minimum indicates the cycle The resource location of transfer resource；

The network side equipment notifies the resource location of the transfer resource of each D2D terminals in the D2D communication sets to corresponding D2D terminals, carried out data transmission with D2D terminals corresponding to instruction on the transfer resource of notice, specifically included：

The resource-niche of transfer resource of the network side equipment by each D2D terminals in the D2D communication sets in the minimum instruction cycle Notice is put to corresponding D2D terminals, with D2D terminals corresponding to instruction in follow-up at least one minimum change cycle described Notify to carry out data transmission on the transfer resource of instruction；Wherein each minimum change cycle includes L minimum instruction cycle, and L is Integer not less than 1.

2. the method as described in claim 1, it is characterised in that the network side equipment is determined corresponding to the D2D communication sets The D2D communication resources, are specifically included：

Network side equipment will be pre-assigned to the communication resource of the D2D communication sets, be defined as corresponding to the D2D communication sets The D2D communication resources；Or

Network side equipment D2D communication resources according to corresponding to the resource occupation request received distributes the D2D communication sets.

3. the method as described in claim 1, it is characterised in that the resource occupation request that the D2D terminals are sent includes：

The SR that the D2D terminals are sent in the exclusive dispatch request SR resources for D2D links of the network side for itself configuration, should SR is used to represent that the D2D terminals are needed in D2D links；And/or

The caching for D2D communications that the D2D terminals are sent in the Physical Uplink Shared Channel PUSCH resources that network side is dispatched Zone state reports that BSR, the BSR are used to represent that the D2D terminals currently need the data volume transmitted on D2D links.

4. the method as described in claim 1, it is characterised in that each minimum instruction cycle includes M subframe, this M son Include M1 D2D subframe in frame, wherein M is the integer more than 1, and M1 is the integer not less than 1.

5. the method as described in claim 1, it is characterised in that further comprise：

Network side equipment and each D2D terminals are made an appointment at least two parameters in minimum change cycle, minimum instruction cycle, L Value；Or

Network side equipment in advance notifies the value of at least two parameters in minimum change cycle, minimum instruction cycle, L to each D2D terminals；Or

Network side equipment and each D2D terminals are made an appointment the value of a parameter in minimum change cycle, minimum instruction cycle, L, And the value of remaining at least one parameter is notified to each D2D terminals in advance.

6. the method as described in claim 1, it is characterised in that the resource occupation request that the basis receives, it is determined that described The resource location of transfer resource of each D2D terminals in a minimum instruction cycle in D2D communication sets, is specifically included：

For each D2D terminals in the D2D communication sets, asked according to the resource occupation received from the D2D set in advance A kind of pattern is chosen in the pattern of a variety of transfer resources corresponding to terminal, and determines that the transmission of the D2D terminals provides according to the pattern The resource location in source, wherein the pattern of every kind of transfer resource, which is a minimum D2D subframe indicated in the cycle, is used as transmission resource Or receive the pattern of resource.

7. the method as described in claim 1, it is characterised in that network side equipment is it is determined that the transfer resource of each D2D terminals Resource location when, determine to carry out the position of the fixed resource of data transmission or reception for the D2D terminals according to preset rules, And the position for determining to be used for the on-fixed resource that the D2D terminals carry out data transmission or reception according to the resource occupation request received Put.

8. the method as described in claim 1, it is characterised in that in network side equipment that each D2D in the D2D communication sets is whole When the resource location of the transfer resource at end is notified to corresponding D2D terminals, further comprise：

The information for the transmission plan that network side equipment uses when each D2D terminals in the D2D communication sets are carried out data transmission Notify to corresponding D2D terminals.

9. the method as described in any in claim 1-8, it is characterised in that the network side equipment is by the D2D communication sets The resource location of the transfer resource of interior each D2D terminals notifies, to corresponding D2D terminals, to specifically include：

Each D2D terminal of the network side equipment into the D2D communication sets sends an indication signaling, every indication signaling respectively The information of the resource location of the middle transfer resource for carrying corresponding D2D terminals；Or

Each D2D terminal of the network side equipment into the D2D communication sets sends an indication signaling, is carried in the indication signaling every The information of the resource location of the transfer resource of individual D2D terminals.

10. the data transmission method in a kind of device-to-device D2D communications, it is characterised in that this method includes：

D2D terminals receive the notice of the resource location of the transfer resource for the D2D terminals that network side equipment is sent；The D2D terminals For a D2D terminal in D2D communication sets, the notice is that network side equipment is being received in the D2D communication sets at least After the resource occupation request that one D2D terminal is sent, according to corresponding to the resource occupation request received in the D2D communication sets The notice of the resource location of the transfer resource of the D2D terminals determined in the D2D communication resources；The transfer resource, which includes sending, to be provided Source and/or reception resource；

D2D terminals carry out data transmission according to the notice on the transfer resource of the D2D terminals；

Wherein, the notice is the D2D terminals in last instruction minimum instruction week that current minimum change cycle receives The notice of the resource location of interim transfer resource, the D2D terminals are according to the notice on the transfer resource of the D2D terminals Carry out data transmission, specifically include：

D2D terminals are for follow-up at least one minimum change cycle, in the enterprising row data of transfer resource of the notice instruction Transmission；Wherein each minimum change cycle includes L minimum instruction cycle, and L is the integer not less than 1.

11. method as claimed in claim 10, it is characterised in that before D2D terminals receive the notice, further wrap Include：

D2D terminals send resource occupation request to network side equipment.

12. method as claimed in claim 11, it is characterised in that the resource occupation request includes：

The SR, the SR that D2D terminals are sent in the exclusive dispatch request SR resources for D2D links of the network side for itself configuration For representing that the D2D terminals are needed in D2D links；And/or

The buffer area for D2D communications that D2D terminals are sent in the Physical Uplink Shared Channel PUSCH resources that network side is dispatched State report BSR, the BSR are used to represent that the D2D terminals currently need the data volume transmitted on D2D links.

13. method as claimed in claim 10, it is characterised in that each minimum instruction cycle includes M subframe, the M Include M1 D2D subframe in subframe, wherein M is the integer more than 1, and M1 is the integer not less than 1.

14. method as claimed in claim 10, it is characterised in that further comprise：

D2D terminals and network side equipment are made an appointment the taking of at least two parameters in minimum change cycle, minimum instruction cycle, L Value；Or

D2D terminals receive minimum change cycle, the minimum that network side equipment is sent in advance and indicate at least two parameters in cycle, L Value；Or

D2D terminals and network side equipment are made an appointment the value of a parameter in minimum change cycle, minimum instruction cycle, L, are connect Receive the value for remaining at least one parameter that network side equipment is sent in advance.

15. method as claimed in claim 10, it is characterised in that also include the D2D terminals in the notice and carry out data biography The information of the transmission plan used when defeated；

The D2D terminals carry out data transmission according to the notice on the transfer resource of the D2D terminals, specifically include：

D2D terminals are carried out data transmission using the transmission plan of notice on the transfer resource of the D2D terminals.

16. the method as described in any in claim 10-14, it is characterised in that after D2D terminals receive the notice, Further comprise：

D2D terminals receive the notice of the resource location of the transfer resource of the D2D terminals of network side equipment transmission again；

D2D terminals carry out data transmission since follow-up minimum change cycle on the transfer resource of newest notice.

17. the method as described in any in claim 10-15, it is characterised in that the D2D terminals receive network side equipment hair The notice of the resource location of the transfer resource for the D2D terminals sent, is specifically included：

D2D terminals receive network side equipment and are directed to the indication signaling that the D2D terminals are sent, and D2D ends are carried in the indication signaling The information of the resource location of the transfer resource at end；Or

D2D terminals receive the indication signaling that network side equipment is sent for each D2D terminals in the D2D communication sets, the instruction The information of the resource location of the transfer resource of each D2D terminals is carried in signaling.

18. a kind of base station, it is characterised in that the base station includes：

Resource determining unit, for being accounted in the resource for receiving the transmission of at least one D2D terminals in same D2D communication sets every time After request, the D2D communication resources corresponding to the D2D communication sets are determined；

Position determination unit, for according to the resource occupation request received, determining each D2D terminals in the D2D communication sets Transfer resource resource location, wherein the transfer resource of each D2D terminals is located in the D2D communication resources；The transmission money Source includes sending resource and/or receives resource；

Position informing unit, for by the resource location of the transfer resource of each D2D terminals in the D2D communication sets notify to pair The D2D terminals answered, carried out data transmission with D2D terminals corresponding to instruction on the transfer resource of notice；

Wherein, the position determination unit is used for：

The position informing unit is used for：

By each D2D terminals in the D2D communication sets the minimum resource location for indicating the transfer resource in the cycle notify to pair The D2D terminals answered, indicated with D2D terminals corresponding to instruction in follow-up at least one minimum change cycle in the notice Carry out data transmission on transfer resource；Wherein each minimum change cycle includes L minimum instruction cycle, and L is whole not less than 1 Number.

19. base station as claimed in claim 18, it is characterised in that the resource determining unit is used for：

The communication resource of the D2D communication sets will be pre-assigned to, be defined as the D2D communication resources corresponding to the D2D communication sets； Or

20. base station as claimed in claim 18, it is characterised in that the D2D terminals that the resource determining unit receives The resource occupation request of transmission includes：

21. base station as claimed in claim 18, it is characterised in that each minimum instruction cycle includes M subframe, the M Include M1 D2D subframe in subframe, wherein M is the integer more than 1, and M1 is the integer not less than 1.

22. base station as claimed in claim 18, it is characterised in that the base station also includes：

Parameter determination unit, for being made an appointment with each D2D terminals at least two in minimum change cycle, minimum instruction cycle, L The value of parameter；Or

The value of at least two parameters in minimum change cycle, minimum instruction cycle, L is notified to each D2D terminals in advance；Or Person,

The value for the parameter in minimum change cycle, minimum instruction cycle, L of being made an appointment with each D2D terminals, and in advance will be surplus The value of remaining at least one parameter is notified to each D2D terminals.

23. base station as claimed in claim 18, it is characterised in that the position determination unit is used for：

24. base station as claimed in claim 18, it is characterised in that the position determination unit is used for：

It is determined that each D2D terminals transfer resource resource location when, determine that being used for the D2D terminals is carried out according to preset rules The position for the fixed resource that data send or received, and determine to enter for the D2D terminals according to the resource occupation request received The position for the on-fixed resource that row data send or received.

25. base station as claimed in claim 18, it is characterised in that the position informing unit is additionally operable to：

When the resource location of the transfer resource of each D2D terminals in by the D2D communication sets is notified to corresponding D2D terminals, The information of the transmission plan used when each D2D terminals in the D2D communication sets are carried out data transmission is notified to corresponding D2D Terminal.

26. the base station as described in any in claim 18-25, it is characterised in that the position informing unit is used for：

Each D2D terminals into the D2D communication sets send an indication signaling respectively, are carried in every indication signaling corresponding The information of the resource location of the transfer resource of D2D terminals；Or

Each D2D terminals into the D2D communication sets send an indication signaling, and each D2D terminals are carried in the indication signaling Transfer resource resource location information.

27. a kind of D2D terminals, it is characterised in that the D2D terminals include：

Position informing receiving unit, the resource location of the transfer resource of the D2D terminals for receiving network side equipment transmission Notice；The D2D terminals are a D2D terminal in D2D communication sets, and the notice is that network side equipment is receiving the D2D After the resource occupation request that at least one D2D terminals in communication set are sent, asked according to the resource occupation received described The notice of the resource location of the transfer resource of the D2D terminals determined in the D2D communication resources corresponding to D2D communication sets；The biography Defeated resource includes sending resource and/or receives resource；

Data transmission unit, for being carried out data transmission according to the notice on the transfer resource of the D2D terminals；

Wherein, the notice that the position informing receiving unit receives is that the D2D terminals receive in current minimum change cycle Last instruction minimum instruction cycle in transfer resource resource location notice；

The data transmission unit is used for：

For follow-up at least one minimum change cycle, carry out data transmission on the transfer resource of the notice instruction；Its In each minimum change cycle include L it is minimum indicate the cycle, L is the integer not less than 1.

28. D2D terminals as claimed in claim 27, it is characterised in that the D2D terminals also include：

Request transmitting unit, for before the notice is received, resource occupation request to be sent to network side equipment.

29. D2D terminals as claimed in claim 28, it is characterised in that the resource occupation that the request transmitting unit is sent please Ask including：

30. D2D terminals as claimed in claim 27, it is characterised in that each minimum instruction cycle includes M subframe, the M Include M1 D2D subframe in individual subframe, wherein M is the integer more than 1, and M1 is the integer not less than 1.

31. D2D terminals as claimed in claim 27, it is characterised in that the D2D terminals also include：

Parameter determination unit, for being made an appointment with network side equipment at least two in minimum change cycle, minimum instruction cycle, L The value of individual parameter；Or

Receive minimum change cycle, the minimum value for indicating at least two parameters in cycle, L that network side equipment is sent in advance； Or

The value for the parameter in minimum change cycle, minimum instruction cycle, L of being made an appointment with network side equipment, receives network The value for remaining at least one parameter that side apparatus is sent in advance.

32. D2D terminals as claimed in claim 27, it is characterised in that the notice that the position informing receiving unit receives In also include the information of the transmission plan that the D2D terminals are used when carrying out data transmission；

The data transmission unit is used for：

33. the D2D terminals as described in any in claim 27-31, it is characterised in that the position informing receiving unit is also used In：The notice of the resource location of the transfer resource for the D2D terminals that network side equipment is sent is received again；

The data transmission unit is additionally operable to：Carried out since follow-up minimum change cycle on the transfer resource of newest notice Data transfer.

34. the D2D terminals as described in any in claim 27-32, it is characterised in that the position informing receiving unit is used In：

Receive network side equipment and be directed to the indication signaling that the D2D terminals are sent, the transmission of the D2D terminals is carried in the indication signaling The information of the resource location of resource；Or

The indication signaling that network side equipment is sent for each D2D terminals in the D2D communication sets is received, is taken in the indication signaling The information of the resource location of transfer resource with each D2D terminals.