CN104661177A - Method, system and equipment for realizing D2D communication - Google Patents
Method, system and equipment for realizing D2D communication Download PDFInfo
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- CN104661177A CN104661177A CN201510110158.9A CN201510110158A CN104661177A CN 104661177 A CN104661177 A CN 104661177A CN 201510110158 A CN201510110158 A CN 201510110158A CN 104661177 A CN104661177 A CN 104661177A
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Abstract
The embodiment of the invention discloses a method, a system and equipment for realizing D2D communication, which can realize D2D communication under D2D terminals with different cells in the same group so that current half-duplex communication constrains can be met. The method comprises the steps that group information of D2D terminals in adjacent cells can be acquired by present D2D terminals, wherein the present D2D terminals and the D2D terminals in the adjacent cells belong to the same group within a preset range; the group information at least includes group identification with the group containing the D2D terminals in the adjacent cells; the group information is transmitted to a service base station by the present D2D terminals so that scheduling strategies are confirmed by the service base station according to the group information; when the present D2D terminals transmit data, the present D2D terminals are scheduled to transmit data according to the scheduling strategies, and the D2D terminals in the adjacent cells in the same group do not transmit data according to the scheduling strategies.
Description
Technical field
The present invention relates to wireless communication technology field, be specifically related to one and realize method, system and the equipment that device-to-device (Device toDevice, be called for short D2D) communicates.
Background technology
D2D communication is at third generation partner program (the 3rd Generation PartnershipProject, be called for short 3GPP) communication technology introduced, at Long Term Evolution (Long Term Evolution, be called for short LTE) in the network architecture, it allows directly to pass through specific channel communication each other, to improve the availability of frequency spectrum and network capacity at a distance of two nearer terminals in cellular network.Wherein, D2D communication uses identical resource with cellular cell terminal, carry out the terminal of D2D communication equally under the control of cell base station, resource that D2D communicates and the transmitting power etc. that controls D2D communicates is distributed, to ensure that D2D communicates the interference that causes community existing communication in tolerance interval by cell base station.
The terminal defining the same group in preset range in D2D communication specification can only send data by a terminal at one time, receives data and does not then limit.Wherein, based on above-mentioned D2D communication specification, if the terminal in same group all belongs to same community, so cell base station then can control within the same time, only have a terminal to send data comparatively easily.If when the terminal in same group belongs to different districts, cell base station only knows the signal intelligence of oneself community, and do not know the signal intelligence of other community, the multiple terminals that then likely there will be in same group send data simultaneously, and also do not have scheme to solve this problem under the prerequisite meeting above-mentioned D2D communication specification at present.
Summary of the invention
Embodiments provide one and realize D2D communication means, system and equipment, to realize that there is different districts D2D terminal in same group, carry out D2D communication and can meet existing half-duplex operation constraint, avoid data receiver failure, improve the reliability of transfer of data in D2D communication.
First aspect present invention provides a kind of method realizing D2D communication, is applied to end side, can comprises:
Current D2D terminal obtains the group information of adjacent cell D2D terminal, and above-mentioned current D2D terminal and above-mentioned adjacent cell D2D terminal belong to the same group in preset range, and above-mentioned group of information at least includes the group mark of group belonging to above-mentioned adjacent cell D2D terminal;
Above-mentioned group of information is sent to serving BS by above-mentioned current D2D terminal, to make above-mentioned serving BS according to above-mentioned group of information determination scheduling strategy, and when above-mentioned current D2D terminal sends data, send data according to the above-mentioned current D2D terminal of above-mentioned scheduling strategy scheduling, and do not send data according to the above-mentioned adjacent cell D2D terminal of above-mentioned scheduling strategy when above-mentioned current D2D terminal sends data in same group.
Second aspect present invention provides a kind of method realizing D2D communication, is applied to base station side, can comprises:
Serving BS receives the group information of the adjacent cell D2D terminal that current D2D terminal sends, above-mentioned current D2D terminal and above-mentioned adjacent cell D2D terminal belong to the same group in preset range, and above-mentioned group of information at least includes the group mark of group belonging to above-mentioned adjacent cell D2D terminal;
Above-mentioned serving BS is according to above-mentioned group of information determination scheduling strategy;
When above-mentioned current D2D terminal sends data, above-mentioned serving BS sends data according to the above-mentioned current D2D terminal of above-mentioned scheduling strategy scheduling, and does not send data according to the above-mentioned adjacent cell D2D terminal of above-mentioned scheduling strategy when above-mentioned current D2D terminal sends data in same group.
Third aspect present invention provides a kind of information getting method, can comprise:
The group information of group belonging to device-to-device D2D terminal obtains, above-mentioned group of information at least includes the group mark of group;
Above-mentioned group of information write D2D is found message by above-mentioned D2D terminal, and above-mentioned D2D finds that message comprises above-mentioned group of information;
Above-mentioned D2D terminal broadcast them D2D in preset range finds message.
Fourth aspect present invention provides a kind of information getting method, can comprise:
In device-to-device D2D terminal monitoring preset range, the D2D of other D2D terminal broadcast finds message, and above-mentioned D2D finds that message includes group information, and above-mentioned group of information at least includes the group mark of group belonging to other D2D terminal above-mentioned;
From above-mentioned D2D, above-mentioned D2D terminal finds that message obtains above-mentioned group of information.
Fifth aspect present invention provides a kind of D2D terminal, can comprise:
First acquisition module, for obtaining the group information of the adjacent cell D2D terminal in the same group in preset range, above-mentioned group of information at least includes the group mark of group belonging to above-mentioned adjacent cell D2D terminal;
First sending module, for above-mentioned group of information is sent to serving BS, to make above-mentioned serving BS according to above-mentioned group of information determination scheduling strategy, and when above-mentioned current D2D terminal sends data, send data according to the above-mentioned current D2D terminal of above-mentioned scheduling strategy scheduling, and do not send data according to above-mentioned scheduling strategy above-mentioned adjacent cell D2D terminal when above-mentioned current D2D terminal sends data.
Sixth aspect present invention provides a kind of D2D terminal, can comprise:
3rd acquisition module, for obtaining the group information of affiliated group, above-mentioned group of information at least includes the group mark of group;
3rd writing module, for above-mentioned group of information write D2D is found message, above-mentioned D2D finds that message comprises above-mentioned group of information;
3rd broadcast module, finds message for broadcast them D2D in preset range.
Seventh aspect present invention provides a kind of D2D terminal, can comprise:
4th monitors module, and the D2D for other D2D terminal broadcast within the scope of preset monitored finds message, and above-mentioned D2D finds that message includes group information, and above-mentioned group of information at least includes the group mark of group belonging to other D2D terminal above-mentioned;
4th acquisition module, the above-mentioned D2D listened to from above-mentioned message monitoring module finds that message obtains above-mentioned group of information.
Eighth aspect present invention provides a kind of base station, can comprise:
5th receiver module, for receiving the group information of the adjacent cell D2D terminal that current D2D terminal sends, above-mentioned current D2D terminal and above-mentioned adjacent cell D2D terminal belong to the same group in preset range, and above-mentioned group of information at least includes the group mark of group belonging to above-mentioned adjacent cell D2D terminal;
5th determination module, for according to above-mentioned group of information determination scheduling strategy;
Scheduler module, for when above-mentioned current D2D terminal sends data, sends data according to the above-mentioned current D2D terminal of above-mentioned scheduling strategy scheduling, and does not send data according to above-mentioned scheduling strategy above-mentioned adjacent cell D2D terminal when above-mentioned current D2D terminal sends data.
Ninth aspect present invention provides a kind of system realizing D2D communication, can comprise: the D2D terminal that above-mentioned 5th aspect provides, and the base station that above-mentioned eighth aspect provides.
As can be seen from the above technical solutions, what the embodiment of the present invention provided realizes in the method for device-to-device D2D communication, current D2D terminal is by the group information of the adjacent cell terminal in its same group of acquisition, this group information includes the group mark of group belonging to adjacent cell D2D terminal, and then this group information is sent to serving BS by D2D terminal.Because group information includes the group mark of group belonging to adjacent cell D2D terminal, therefore, serving BS can be in same group according to group information but belong to the current D2D terminal of different districts respectively and adjacent cell D2D terminal determines a scheduling strategy, and then when current D2D terminal sends data, adjacent cell D2D terminal can be controlled can not send data simultaneously, meet existing half-duplex constraint, thus to make in preset range same group inherence at the same time only a D2D terminal send data, avoid data receiver failure, improve the reliability of transfer of data.
Term " first ", " second ", " the 3rd ", " the 4th ", " the 5th " etc. in specification of the present invention and claims and above-mentioned accompanying drawing are for distinguishing different objects, instead of for describing specific order.In addition term " comprises " and " having " and their any distortion, and intention is to cover not exclusive comprising.Such as contain the process of series of steps or module, method, system, product or equipment and be not defined in the step or module listed, but the step or module do not listed can be comprised.
Below be described in detail respectively.
First some possible application scenarioss that the technical scheme of composition graphs 1 pair of embodiment of the present invention relates to carry out citing introduction.A kind of LTE network configuration diagram that Fig. 1 provides for the embodiment of the present invention.
As shown by way of example in fig. 1, this LTE network framework comprises: under core net (Core Network is called for short CN), comprise some evolved base station (evolved Node B is called for short eNB), for eNB1 and eNB2 in Fig. 1.Group B comprises 3 user terminal (User Equipment, be called for short UE), be respectively UE1, UE2 and UE3, wherein, under UE1 is operated in the community A1 of eNB1 covering, under UE2 and UE3 is operated in the community A2 of eNB2 covering, UE1, UE2 and UE3 all have D2D communication capacity, therefore, UE1, UE2 and UE3 are the D2D terminal alleged by the present invention.
It should be noted that, preset range provided by the invention generally divides according to the transmitting power of D2D terminal and receiving ability, and group refers to and to contract the working group carrying out dividing according to business/user.
Below based on the framework shown in Fig. 1, the different UEs in same group that may to be formed in preset range introducing that inventor analyzes and researches out sends data simultaneously, does not meet existing half-duplex operation and the situation of the data receiver failure caused.
Because UE1 only knows the signal intelligence of the UE in the community under its covering at the community A1 that eNB1 covers, UE2 and UE3 at the community A2 that eNB2 covers, eNB, therefore, eNB1 only knows the signal intelligence of UE1, and eNB2 only knows the signal intelligence of UE2 and UE3.ENB2 can only not send data by control UE2 and UE3 at the same time, but any one is when sending data in UE2 and UE3, and possible UE1 is also in transmission data.
But be directed to D2D communication, network side is the time/frequency source block that different group allocation is different, and the UE in group can utilize the time/frequency source block of distribution to carry out D2D communication.Due within the same time, a UE in group employs time/frequency source block, then other UE then cannot use this time/frequency source block within this time period, otherwise causes recipient to receive data failure.But above-mentioned eNB1 and eNB2 may dispatch UE carries out data transmission simultaneously, cause different UEs to send data simultaneously, thus cause data receiver failure.
Under the technical scheme emphasis of the embodiment of the present invention probes into the scene of the D2D terminal that there is different districts in preset range in some groups, how to avoid sending data because of the D2D terminal different by different base station schedulings and causing at the same time the situation that there are different D2D terminal transmission data to occur, meet existing half-duplex operation constraint, and then improve the reliability of transfer of data in D2D communication.
In addition, a kind of D2D terminal discovery mechanism of enhancing is provided in this programme, namely find increase group information field in message at the D2D of D2D terminal, D2D terminal can be made by the D2D terminal discovery mechanism strengthened to be obtained the group information of other D2D terminal in preset range when being necessary.
First simply introduce this programme below and how to obtain group information by the D2D terminal discovery mechanism strengthened.
In some embodiments of the invention, a kind of information getting method comprises: the group information of group belonging to device-to-device D2D terminal obtains, and above-mentioned group of information at least includes the group mark of group; Above-mentioned group of information write D2D is found message by above-mentioned D2D terminal, and above-mentioned D2D finds that message comprises above-mentioned group of information; The above-mentioned D2D of above-mentioned D2D terminal broadcast finds message.
Wherein, the group information of respective group is written to D2D and finds in message by D2D terminal, then broadcast this D2D and find message, and then according to D2D, other D2D terminal not only can find that message determines whether it is D2D terminal, group information can also be got, determine group belonging to it according to group information.
In some embodiments of the invention, a kind of information getting method comprises: the D2D of other D2D terminal broadcast of device-to-device D2D terminal monitoring finds message, above-mentioned D2D finds that message includes group information, and above-mentioned group of information at least includes the group mark of group belonging to other D2D terminal above-mentioned; From above-mentioned D2D, above-mentioned D2D terminal finds that message obtains above-mentioned group of information.
Wherein, D2D terminal finds message by the D2D of other D2D terminal broadcast within the scope of preset monitored, thus can find the group information in message according to D2D.
Based on above-mentioned explanation, the present invention realizes an embodiment of the method for D2D communication, can comprise: current D2D terminal obtains the group information of adjacent cell D2D terminal, above-mentioned current D2D terminal and above-mentioned adjacent cell D2D terminal belong to the same group in preset range, and above-mentioned group of information at least includes the group mark of group belonging to above-mentioned adjacent cell D2D terminal; Above-mentioned group of information is sent to serving BS by above-mentioned current D2D terminal, to make above-mentioned serving BS according to above-mentioned group of information determination scheduling strategy, and when above-mentioned current D2D terminal sends data, send data according to the current D2D terminal of above-mentioned scheduling strategy execution cost, and do not send data according to described scheduling strategy described adjacent cell D2D terminal when described current D2D terminal sends data.
Refer to Fig. 2, the schematic flow sheet realizing the method for D2D communication that Fig. 2 provides for the embodiment of the present invention; Wherein, the method that a kind of D2D of realization that one embodiment of the present of invention provide communicates can comprise following content:
201, current D2D terminal obtains the group information of adjacent cell D2D terminal, and above-mentioned current D2D terminal and above-mentioned adjacent cell D2D terminal belong to the same group in preset range, and above-mentioned group of information at least includes the group mark of group belonging to above-mentioned adjacent cell D2D terminal;
In some embodiments of the invention, by the D2D terminal discovery mechanism of the above-mentioned enhancing provided, namely find increase group information field in message at the D2D of D2D, D2D terminal can be made when being necessary by the group information of adjacent cell D2D terminal in the same group in the D2D terminal discovery mechanism acquisition preset range of enhancing.
In other embodiments of the present invention, network side carries out group's running time-frequency resource configuration to group in advance, is different groups and configures different running time-frequency resources, then the group information of D2D terminal and the running time-frequency resource of its place group is had mapping relations.
Therefore, in some embodiments of the invention, current D2D terminal can find acquisition group information message from the D2D of adjacent cell D2D terminal; Or according to the running time-frequency resource acquisition group information of group.Certainly, in embodiments of the present invention can also otherwise to D2D terminal instruction group information, correspondingly, current D2D terminal can obtain group information in a corresponding way.
Wherein, above-mentioned current D2D terminal obtains the group information of adjacent cell D2D terminal, can comprise: the D2D that in above-mentioned current D2D terminal monitoring preset range, other D2D terminal sends finds message, and an above-mentioned D2D finds that message includes group information; Above-mentioned current D2D terminal finds acquisition group information message from an above-mentioned D2D, and the cell ID included by above-mentioned group of information, from other D2D terminal above-mentioned, determine adjacent cell D2D terminal; Above-mentioned current D2D terminal finds message acquisition group information from a D2D of above-mentioned adjacent cell D2D terminal.
It is many that mode group information be increased in D2D discovery message is applicable to group, and be the scene of dynamic group, if current D2D terminal is carrying out having carried out D2D discovery in data transmission for the previous period, then do not need again to trigger D2D in order to data send to find, message is frequently triggered to avoid D2D to find.
Wherein, above-mentioned current D2D terminal obtains the group information of adjacent cell D2D terminal, can also comprise: the 2nd D2D that in above-mentioned current D2D terminal monitoring preset range, other D2D terminal sends finds message, and the community running time-frequency resource corresponding according to other D2D terminal above-mentioned, from other D2D terminal above-mentioned, determine adjacent cell D2D terminal; Above-mentioned current D2D terminal obtains above-mentioned adjacent cell D2D terminal and sends group's running time-frequency resource that above-mentioned 2nd D2D finds message, obtain the group information of above-mentioned adjacent cell D2D terminal according to above-mentioned group running time-frequency resource, the group information of above-mentioned group running time-frequency resource and above-mentioned adjacent cell D2D terminal has mapping relations.
Find that in message, increase group information is different from above-mentioned at D2D, fewer in group, and group is when being relatively in static state, network side can, by configuring the mode of different running time-frequency resources for different groups to indicate group information, make the D2D terminal of particular demographic use different running time-frequency resources.
Be understandable that, in some embodiments of the invention, current D2D terminal can determine adjacent cell D2D terminal, then adjacent cell D2D terminal is sent to serving BS, or, the group information of other D2D terminals all listened in preset range directly can also be sent to serving BS by current D2D terminal, determines adjacent cell D2D terminal by serving BS.
202, above-mentioned group of information is sent to serving BS by above-mentioned current D2D terminal, to make above-mentioned serving BS according to above-mentioned group of information determination scheduling strategy, and when above-mentioned current D2D terminal sends data, send data according to the above-mentioned current D2D terminal of above-mentioned scheduling strategy scheduling, and do not send data according to the above-mentioned adjacent cell D2D terminal of above-mentioned scheduling strategy when above-mentioned current D2D terminal sends data in same group.
Current D2D terminal is by the group information of the adjacent cell terminal in its same group of acquisition, and this group information includes the group mark of group belonging to adjacent cell D2D terminal, and then this group information is sent to serving BS by D2D terminal.Because group information includes the group mark of group belonging to adjacent cell D2D terminal, therefore, serving BS can be in same group according to group information but belong to the current D2D terminal of different districts respectively and adjacent cell D2D terminal determines a scheduling strategy, and then when current D2D terminal sends data, adjacent cell D2D terminal can be controlled can not send data simultaneously, meet existing half-duplex constraint, thus to make in preset range same group at the same time only a D2D terminal send data, avoid data receiver failure, improve the reliability of transfer of data.
In some embodiments of the invention, above-mentioned group of information sends to serving BS to comprise by above-mentioned current D2D terminal: above-mentioned group of information is write preset the first wireless heterogeneous networks (Radio Resource Control by above-mentioned current D2D terminal, be called for short RRC) signaling, and a RRC signaling of write above-mentioned group of information is sent to serving BS; Or above-mentioned current D2D terminal generates self-defining 2nd RRC signaling, by the above-mentioned group of above-mentioned 2nd RRC signaling of information write, and the 2nd RRC signaling of write above-mentioned group of information is sent to serving BS.
Wherein, can be directly utilize existing RRC signaling to send group information, be written in RRC signaling by group information, certainly, may further be transmission group information and generate a self-defining RRC signaling, then group information is written in new RRC signaling and sends.
Be understandable that, RRC signaling has better extensibility, meanwhile, owing to not needing when each D2D terminal sends data in the solution of the present invention, all carry out the determination of a scheduling strategy, therefore the delay of RRC signaling can meet the demand of this processing mode.In the embodiment of the present invention, preferred RRC signaling sends group information, but does not get rid of MAC signaling and also can be used for transmission group information.
The present invention realizes another embodiment of the method for D2D communication, can comprise: serving BS receives the group information of the adjacent cell D2D terminal that current D2D terminal sends, above-mentioned current D2D terminal and above-mentioned adjacent cell D2D terminal belong to the same group in preset range, and above-mentioned group of information at least includes the group mark of group belonging to above-mentioned adjacent cell D2D terminal; Serving BS is according to above-mentioned group of information determination scheduling strategy, when above-mentioned current D2D terminal sends data, above-mentioned serving BS sends data according to the above-mentioned current D2D terminal of above-mentioned scheduling strategy scheduling, and does not send data according to the above-mentioned adjacent cell D2D terminal of above-mentioned scheduling strategy when above-mentioned current D2D terminal sends data in same group.
Refer to Fig. 3, the schematic flow sheet realizing the method for D2D communication that Fig. 3 provides for another embodiment of the present invention; Wherein, the method that a kind of D2D of realization that one embodiment of the present of invention provide communicates can comprise following content:
301, serving BS receives the group information of the adjacent cell D2D terminal that current D2D terminal sends, above-mentioned current D2D terminal and above-mentioned adjacent cell D2D terminal belong to same group in preset range, and above-mentioned group of information at least includes the group mark of group belonging to above-mentioned adjacent cell D2D terminal;
302, the above-mentioned serving BS serving BS that sends to above-mentioned adjacent cell D2D terminal corresponding above-mentioned group of information, and according to above-mentioned group of information, the serving BS corresponding with above-mentioned adjacent cell D2D terminal consults scheduling strategy;
Wherein, after serving BS receives the group information of adjacent cell D2D terminal from current D2D terminal, then group information is sent to the serving BS of adjacent cell D2D terminal, the group mark of group belonging to the serving BS of adjacent cell D2D terminal comprises according to group information, understands the group at its place.And then the serving BS serving BS corresponding with adjacent cell D2D terminal negotiates scheduling strategy, this scheduling strategy is mainly used to avoid different D2D terminal to send data at one time.
Be understandable that, due to the network side different running time-frequency resource that has been distinct group group configuration, D2D terminal in this group can utilize this running time-frequency resource to carry out D2D communication, therefore, the time-domain of this scheduling strategy specifically frequently resource in use staggers, avoids current D2D to communicate communicating with adjacent cell D2D clashing in time-domain.
Need to illustrate, for example, the UE1 under the A of base station, UE2 under the B of base station, the UE3 under the C of base station, UE1, UE2 and UE3 belong to same group, UE1 obtains the group information of UE2 and UE3 respectively, then sends to base station A, and the group information of UE2 is sent to base station B by base station A, the group information of UE3 is sent to base station C by base station A again, and then negotiate scheduling strategy A between base station A and base station B, this scheduling strategy A is used for controlling when UE1 sends data, UE2 does not send data, and vice versa.Meanwhile, negotiate scheduling strategy B between base station A and base station C, scheduling strategy B is used for controlling when UE1 sends data, and UE3 does not send data, and vice versa.Now to it is noted that between scheduling strategy A and scheduling that any 2 can not send data simultaneously in demand fulfillment UE1, UE2 and UE3.
In some embodiments of the invention, above-mentioned serving BS corresponding to above-mentioned adjacent cell D2D terminal that above-mentioned group of information sent to comprises: the serving BS sending to described adjacent cell D2D terminal corresponding described group of information by X2 interface message.
303, when above-mentioned current D2D terminal sends data, above-mentioned serving BS sends data according to the above-mentioned current D2D terminal of above-mentioned scheduling strategy scheduling, and does not send data according to above-mentioned scheduling strategy above-mentioned adjacent cell D2D terminal when above-mentioned current D2D terminal sends data.
In the above-described embodiments, the group information of adjacent cell D2D terminal is sent to the serving BS of its correspondence by serving BS, then negotiates scheduling strategy, thus makes to only have a D2D terminal to send data at the same time in same group.
In another embodiment, as shown in Figure 4, a kind of method realizing D2D communication, can comprise:
401, serving BS receives the group information of the adjacent cell D2D terminal that current D2D terminal sends, above-mentioned current D2D terminal and above-mentioned adjacent cell D2D terminal belong to the same group in preset range, and above-mentioned group of information at least includes the group mark of group belonging to above-mentioned adjacent cell D2D terminal;
402, above-mentioned group of information is sent to network side entity by above-mentioned serving BS, to make above-mentioned network side entity according to above-mentioned group of information determination scheduling strategy;
Above-mentioned network side entity can be ProSe Function, mobile management entity (MobilityManagenment Entity is called for short MME) etc., in this no limit.
In some embodiments of the invention, above-mentionedly network side entity is sent to comprise above-mentioned group of information: by S1 message, above-mentioned group of information to be sent to network side entity.
403, when above-mentioned current D2D terminal sends data, above-mentioned serving BS sends data according to the above-mentioned current D2D terminal of above-mentioned scheduling strategy scheduling, and does not send data according to above-mentioned scheduling strategy above-mentioned adjacent cell D2D terminal when above-mentioned current D2D terminal sends data.
In the above-described embodiments, determine scheduling strategy by network side entity, carry out unified management, be applicable to more group, and there is in group the scene of the D2D terminal of more different districts.
For ease of better understanding and implement the such scheme of the embodiment of the present invention, be described below by some concrete application scenarioss of citing.
Wherein, be first described to implement method corresponding to Fig. 2 and Fig. 3 in the LTE network framework shown in Fig. 1 below.
The schematic flow sheet that another kind that an alternative embodiment of the invention provides realizes the method for D2D communication see Fig. 5, Fig. 5.Wherein, the method that the another kind that an alternative embodiment of the invention provides realizes D2D communication can comprise following content:
501, UE1 obtains the group information of UE2 and UE3;
Wherein, the group information of UE2 includes the group mark of group B, and equally, the group information of UE3 includes the group mark of group B.
502, the group information of UE2 and UE3 is sent to eNB1 by UE1;
503, the group information of above-mentioned UE2 and UE3 is sent to eNB2 by X2 interface message by eNB1;
504, according to the group information of above-mentioned UE2 and UE3, eNB1 and eNB2 consults scheduling strategy;
Wherein, after the group information of UE2 and UE3 is sent to eNB2 by eNB1, eNB1 and eNB2 holds consultation, how the scheduling strategy consulted specifically is avoided when UE1 sends data, UE2 and UE3 does not send data, or when in UE2 and UE3, any one sends data, UE1 does not send data.UE2 and UE3 then directly can be controlled to make them within the same time, not send data by eNB2.
505, when UE1 sends data, eNB1 is according to scheduling strategy, and scheduling UE1 sends data, and now UE2 and UE3 does not all send data.
Realize the schematic flow sheet of the method for D2D communication for another kind that another embodiment of the present invention provides see Fig. 6, Fig. 6.Wherein, the method that the another kind that an alternative embodiment of the invention provides realizes D2D communication can comprise following content:
601, UE1 obtains the group information of UE2 and UE3, and UE2 obtains the group information of UE1, and UE3 obtains the group information of UE1;
Wherein, the group information of UE2 includes the group mark of group B, and equally, the group information of UE3 includes the group mark of group B, and the group information of UE1 includes the group mark of group B.
602, the group information of UE2 and UE3 is sent to eNB1 by UE1, and the group information of UE1 is sent to eNB2 by UE2, and the group information of UE1 is sent to eNB2 by UE3;
603, the group information of UE2 and UE3 is sent to MME by eNB1, and the group information of UE1 is sent to MME by eNB2;
604, MME is according to the group information of above-mentioned UE1, UE2 and UE3, determines scheduling strategy;
Wherein, after the group information of UE2 and UE3 is sent to MME by UE1, MME determines scheduling strategy, and specifically how to avoid when UE1 sends data, UE2 and UE3 does not send data, or when in UE2 and UE3, any one sends data, UE1 does not send data.UE2 and UE3 then directly can be controlled to make them within the same time, not send data by eNB2.
605, when UE1 sends data, eNB1 sends data according to scheduling strategy scheduling UE1, equally, sends data at UE2 or UE3, and eNB1 sends data according to scheduling strategy scheduling UE2 or UE3.
In the above-described embodiments, group information is sent to network side entity MME by eNB, determines a scheduling strategy, then scheduling strategy is handed down to eNB by MME is unified according to group information, and eNB then can dispatch UE according to scheduling strategy and send data.
Refer to Fig. 7, the structural representation of the D2D terminal that Fig. 7 provides for the embodiment of the present invention; As shown in Figure 7, a kind of D2D terminal 700, can comprise:
First acquisition module 710, for obtaining the group information of the adjacent cell D2D terminal in the same group in preset range, above-mentioned group of information at least includes the group mark of group belonging to above-mentioned adjacent cell D2D terminal;
First sending module 720, for above-mentioned group of information is sent to serving BS, to make above-mentioned serving BS according to above-mentioned group of information determination scheduling strategy, and when above-mentioned current D2D terminal sends data, send data according to the above-mentioned current D2D terminal of above-mentioned scheduling strategy scheduling, and do not send data according to the above-mentioned adjacent cell D2D terminal of above-mentioned scheduling strategy when above-mentioned current D2D terminal sends data in same group.
In some possible embodiments of the present invention, above-mentioned group of information also comprises the cell ID of adjacent cell D2D terminal affiliated subdistrict, and therefore, above-mentioned first acquisition module 710 specifically comprises:
First monitors module, and the D2D sent for other D2D terminal within the scope of preset monitored finds message, and an above-mentioned D2D finds that message includes group information;
First determination module, for finding acquisition group information in message from an above-mentioned D2D, and the cell ID included by above-mentioned group of information, from other D2D terminal above-mentioned, determine adjacent cell D2D terminal;
First information acquisition module, for finding message acquisition group information from a D2D of above-mentioned adjacent cell D2D terminal.
In other possible embodiments of the present invention, the first acquisition module 710 specifically comprises:
Second monitors module, and the 2nd D2D sent for other D2D terminal within the scope of preset monitored finds message;
Second determination module, for the community running time-frequency resource corresponding according to other D2D terminal above-mentioned, determines adjacent cell D2D terminal from other D2D terminal above-mentioned;
Second data obtaining module, group's running time-frequency resource that above-mentioned 2nd D2D finds message is sent for obtaining above-mentioned adjacent cell D2D terminal, obtain the group information of above-mentioned adjacent cell D2D terminal according to above-mentioned group running time-frequency resource, the group information of above-mentioned group running time-frequency resource and above-mentioned adjacent cell D2D terminal have mapping relations,
Alternatively, a RRC signaling of write above-mentioned group of information specifically for above-mentioned group of information being write the first radio resource control RRC signaling preset, and is sent to serving BS by above-mentioned first sending module 720;
Alternatively, the 2nd RRC signaling of write above-mentioned group of information, specifically for generating self-defining 2nd RRC signaling, by the above-mentioned group of above-mentioned 2nd RRC signaling of information write, and is sent to serving BS by above-mentioned first sending module 720.
Refer to Fig. 8 a, the structural representation of the D2D terminal that the information getting method that Fig. 8 a provides for the embodiment of the present invention is corresponding, as shown in Figure 8 a, a kind of D2D terminal comprises:
3rd acquisition module 810, for obtaining the group information of affiliated group, above-mentioned group of information at least includes the group mark of group;
3rd writing module 820, for above-mentioned group of information write D2D is found message, above-mentioned D2D finds that message comprises above-mentioned group of information;
3rd broadcast module 830, finds message for broadcast them D2D in preset range.
Refer to Fig. 8 b, the structural representation of the D2D terminal that the information getting method that Fig. 8 b provides for another embodiment of the present invention is corresponding, as shown in Figure 8 b, a kind of D2D terminal comprises:
4th monitors module 840, and the D2D for other D2D terminal broadcast within the scope of preset monitored finds message, and above-mentioned D2D finds that message includes group information, and above-mentioned group of information at least includes the group mark of group belonging to other D2D terminal above-mentioned;
4th acquisition module 850, the above-mentioned D2D listened to from above-mentioned message monitoring module finds that message obtains above-mentioned group of information.
Refer to Fig. 9, the structural representation of the base station that Fig. 9 provides for the embodiment of the present invention; As shown in Figure 8, a kind of base station 900, can comprise:
5th receiver module 910, for receiving the group information of the adjacent cell D2D terminal that current D2D terminal sends, above-mentioned current D2D terminal and above-mentioned adjacent cell D2D terminal belong to the same group in preset range, and above-mentioned group of information at least includes the group mark of group belonging to above-mentioned adjacent cell D2D terminal;
5th determination module 920, for according to above-mentioned group of information determination scheduling strategy;
Scheduler module 930, for when above-mentioned current D2D terminal sends data, send data according to the above-mentioned current D2D terminal of above-mentioned scheduling strategy scheduling, and do not send data according to the above-mentioned adjacent cell D2D terminal of above-mentioned scheduling strategy when above-mentioned current D2D terminal sends data in same group.
In some possible embodiments of the present invention, above-mentioned 5th determination module 920 specifically for, the serving BS sending to described adjacent cell D2D terminal corresponding described group of information, according to described group of information, the serving BS corresponding with described adjacent cell D2D terminal consults scheduling strategy.
In some possible embodiments of the present invention, above-mentioned 5th determination module 920 specifically for, described group of information is sent to network side entity, to make described network side entity according to described group of information determination scheduling strategy.
Preferably, the serving BS of above-mentioned 3rd sending module specifically for sending to above-mentioned adjacent cell D2D terminal corresponding above-mentioned group of information by X2 interface message.
Preferably, above-mentioned 4th sending module is specifically for sending to network side entity by S1 message by above-mentioned group of information.
Refer to Figure 10, the system realizing D2D communication that Figure 10 provides for the embodiment of the present invention, comprise the D2D terminal 700 shown in Fig. 7 and the base station shown in Fig. 9 900.
Wherein, refer to the introduction of accompanying drawing 7 pairs of D2D terminals and accompanying drawing 9 pairs of base stations, do not repeat them here.
In the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.
Those skilled in the art can be well understood to, and for convenience and simplicity of description, the system of foregoing description, the specific works process of device and unit, with reference to the corresponding process in preceding method embodiment, can not repeat them here.
In several embodiments that the application provides, should be understood that, disclosed system, apparatus and method, can realize by another way.Such as, device embodiment described above is only schematic, such as, the division of described unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of device or unit or communication connection can be electrical, machinery or other form.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.
If described integrated unit using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words or all or part of of this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or serving BS etc.) perform all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, portable hard drive, read-only memory (ROM, Read-OnlyMemory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. various can be program code stored medium.
Above method, system and equipment that a kind of D2D of realization provided by the present invention communicates are described in detail, for one of ordinary skill in the art, according to the thought of the embodiment of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, be briefly described to the accompanying drawing used required in the embodiment of the present invention below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The LTE network configuration diagram that Fig. 1 provides for the embodiment of the present invention;
The schematic flow sheet realizing the method for D2D communication that Fig. 2 provides for the embodiment of the present invention;
The schematic flow sheet realizing the method for D2D communication that Fig. 3 provides for another embodiment of the present invention;
The schematic flow sheet realizing the method for D2D communication that Fig. 4 provides for another embodiment of the present invention;
The schematic flow sheet realizing the method for D2D communication that Fig. 5 provides for another embodiment of the present invention;
The schematic flow sheet realizing the method for D2D communication that Fig. 6 provides for another embodiment of the present invention;
The structural representation of the D2D terminal that Fig. 7 provides for the embodiment of the present invention;
The structural representation of the D2D terminal that Fig. 8 a provides for another embodiment of the present invention;
The structural representation of the D2D terminal that Fig. 8 b provides for another embodiment of the present invention;
The structural representation of the base station that Fig. 9 provides for the embodiment of the present invention;
The structural representation realizing the system of D2D communication that Figure 10 provides for the embodiment of the present invention.
Embodiment
Embodiments provide a kind of method realizing D2D communication, with at Long Term Evolution (LongTerm Evolution, be called for short LTE) there is the D2D terminal scene of different districts in same group under the network architecture in preset range under, realize same group at one time only D2D terminal send data, meet existing half-duplex operation constraint, avoid data receiver failure, improve the reliability of transfer of data in D2D communication.The embodiment of the present invention is also corresponding provides a kind of system realizing D2D communication, and D2D terminal and base station.
For making goal of the invention of the present invention, feature, advantage can be more obvious and understandable, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, the embodiments described below are only the present invention's part embodiments, and the embodiment of not all.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Claims (21)
1. realize a method for D2D communication, be applied to end side, it is characterized in that, comprising:
Current D2D terminal obtains the group information of adjacent cell D2D terminal, and described current D2D terminal and described adjacent cell D2D terminal belong to the same group in preset range, and described group of information at least includes the group mark of group belonging to described adjacent cell D2D terminal;
Described group of information is sent to serving BS by described current D2D terminal, to make described serving BS according to described group of information determination scheduling strategy, and when described current D2D terminal sends data, send data according to the current D2D terminal of described scheduling strategy execution cost, and do not send data according to the described adjacent cell D2D terminal of described scheduling strategy when described current D2D terminal sends data in same group.
2. method according to claim 1, is characterized in that,
Described group of information also comprises the cell ID of adjacent cell D2D terminal affiliated subdistrict, and the group information that described current D2D terminal obtains adjacent cell D2D terminal comprises:
The D2D that in described current D2D terminal monitoring preset range, other D2D terminal sends finds message, and a described D2D finds that message includes group information;
Described current D2D terminal finds acquisition group information message from a described D2D, and the cell ID included by described group of information, from other D2D terminal described, determine adjacent cell D2D terminal;
Described current D2D terminal finds message acquisition group information from a D2D of described adjacent cell D2D terminal.
3. method according to claim 1, is characterized in that,
The group information that described current D2D terminal obtains adjacent cell D2D terminal comprises:
The 2nd D2D that in described current D2D terminal monitoring preset range, other D2D terminal sends finds message, and the community running time-frequency resource corresponding according to other D2D terminal described, from other D2D terminal described, determine adjacent cell D2D terminal;
Described current D2D terminal obtains described adjacent cell D2D terminal and sends group's running time-frequency resource that described 2nd D2D finds message, obtain the group information of described adjacent cell D2D terminal according to described group running time-frequency resource, the group information of described group running time-frequency resource and described adjacent cell D2D terminal has mapping relations.
4. the method according to any one of claims 1 to 3, is characterized in that,
Described group of information sends to serving BS to comprise by described current D2D terminal:
Described group of information is write the first preset radio resource control RRC signaling by described current D2D terminal, and a RRC signaling of write described group of information is sent to serving BS.
5. the method according to any one of claims 1 to 3, is characterized in that,
Described group of information sends to serving BS to comprise by described current D2D terminal:
Described current D2D terminal generates self-defining 2nd RRC signaling, by the described group of described 2nd RRC signaling of information write, and the 2nd RRC signaling of write described group of information is sent to serving BS.
6. realize a method for D2D communication, be applied to base station side, it is characterized in that, comprising:
Serving BS receives the group information of the adjacent cell D2D terminal that current D2D terminal sends, described current D2D terminal and described adjacent cell D2D terminal belong to the same group in preset range, and described group of information at least includes the group mark of group belonging to described adjacent cell D2D terminal;
Described serving BS is according to described group of information determination scheduling strategy;
When described current D2D terminal sends data, described serving BS sends data according to the current D2D terminal of described scheduling strategy execution cost, and does not send data according to the described adjacent cell D2D terminal of described scheduling strategy when described current D2D terminal sends data in same group.
7. method according to claim 6, is characterized in that,
Described serving BS comprises according to described group of information determination scheduling strategy:
The serving BS that described group of information sends to described adjacent cell D2D terminal corresponding by described serving BS, and according to described group of information, the serving BS corresponding with described adjacent cell D2D terminal consults scheduling strategy.
8. method according to claim 6, is characterized in that,
Described serving BS comprises according to described group of information determination scheduling strategy:
Described group of information is sent to network side entity by described serving BS, to make described network side entity according to described group of information determination scheduling strategy.
9. an information getting method, is characterized in that, comprising:
The group information of group belonging to device-to-device D2D terminal obtains, described group of information at least includes the group mark of group;
Described group of information write D2D is found message by described D2D terminal, and described D2D finds that message comprises described group of information;
D2D described in described D2D terminal broadcast finds message.
10. an information getting method, is characterized in that, comprising:
The D2D of other D2D terminal broadcast of device-to-device D2D terminal monitoring finds message, and described D2D finds that message includes group information, and described group of information at least includes the group mark of group belonging to other D2D terminal described;
From described D2D, described D2D terminal finds that message obtains described group of information.
11. 1 kinds of D2D terminals, is characterized in that, comprising:
First acquisition module, for obtaining the group information of the adjacent cell D2D terminal in the same group in preset range, described group of information at least includes the group mark of group belonging to described adjacent cell D2D terminal;
First sending module, for described group of information is sent to serving BS, to make described serving BS according to described group of information determination scheduling strategy, and when described current D2D terminal sends data, send data according to the current D2D terminal of described scheduling strategy execution cost, and do not send data according to described scheduling strategy described adjacent cell D2D terminal when described current D2D terminal sends data.
12. D2D terminals according to claim 11, is characterized in that,
Described group of information also comprises the cell ID of adjacent cell D2D terminal affiliated subdistrict, and described first acquisition module comprises:
First monitors module, and the D2D sent for other D2D terminal within the scope of preset monitored finds message, and a described D2D finds that message includes group information;
First determination module, for finding acquisition group information in message from a described D2D, and the cell ID included by described group of information, from other D2D terminal described, determine adjacent cell D2D terminal;
First information acquisition module, for finding message acquisition group information from a D2D of described adjacent cell D2D terminal.
13. D2D terminals according to claim 11, is characterized in that,
Described first acquisition module comprises:
Second monitors module, and the 2nd D2D sent for other D2D terminal within the scope of preset monitored finds message;
Second determination module, for the community running time-frequency resource corresponding according to other D2D terminal described, determines adjacent cell D2D terminal from other D2D terminal described;
Second data obtaining module, group's running time-frequency resource that described 2nd D2D finds message is sent for obtaining described adjacent cell D2D terminal, obtain the group information of described adjacent cell D2D terminal according to described group running time-frequency resource, the group information of described group running time-frequency resource and described adjacent cell D2D terminal has mapping relations.
14. D2D terminals according to any one of claim 11 ~ 13, is characterized in that,
One RRC signaling of write described group of information specifically for described group of information is write the first preset radio resource control RRC signaling, and is sent to serving BS by described first sending module.
15. D2D terminals according to any one of claim 11 ~ 13, is characterized in that,
2nd RRC signaling of write described group of information, specifically for generating self-defining 2nd RRC signaling, by the described group of described 2nd RRC signaling of information write, and is sent to serving BS by described first sending module.
16. 1 kinds of D2D terminals, is characterized in that, comprising:
3rd acquisition module, for obtaining the group information of affiliated group, described group of information at least includes the group mark of group;
3rd writing module, for described group of information write D2D is found message, described D2D finds that message comprises described group of information;
3rd broadcast module, finds message for broadcasting described D2D.
17. 1 kinds of D2D terminals, is characterized in that, comprising:
4th monitors module, finds message for the D2D monitoring other D2D terminal broadcast, and described D2D finds that message includes group information, and described group of information at least includes the group mark of group belonging to other D2D terminal described;
4th acquisition module, the described D2D listened to from described message monitoring module finds that message obtains described group of information.
18. 1 kinds of base stations, is characterized in that, comprising:
5th receiver module, for receiving the group information of the adjacent cell D2D terminal that current D2D terminal sends, described current D2D terminal and described adjacent cell D2D terminal belong to the same group in preset range, and described group of information at least includes the group mark of group belonging to described adjacent cell D2D terminal;
5th determination module, for according to described group of information determination scheduling strategy;
Scheduler module, for when described current D2D terminal sends data, sends data according to the current D2D terminal of described scheduling strategy execution cost, and does not send data according to described scheduling strategy described adjacent cell D2D terminal when described current D2D terminal sends data.
19. base stations according to claim 18, is characterized in that,
Described 5th determination module specifically for, the serving BS sending to described adjacent cell D2D terminal corresponding described group of information, according to described group of information, the serving BS corresponding with described adjacent cell D2D terminal consults scheduling strategy.
20. base stations according to claim 18, is characterized in that,
Described 5th determination module specifically for, described group of information is sent to network side entity, to make described network side entity according to described group of information determination scheduling strategy.
21. 1 kinds of systems realizing D2D and communicate, is characterized in that, comprise the D2D terminal described in any one of claim 11 ~ 15, and the base station described in any one of claim 18 ~ 20.
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| PCT/CN2015/080408 WO2016141636A1 (en) | 2015-03-12 | 2015-05-29 | D2d communication method, system and device |
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| WO2016141636A1 (en) | 2016-09-15 |
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