CN104661177B - A kind of method, system and equipment for realizing D2D communications - Google Patents

A kind of method, system and equipment for realizing D2D communications Download PDF

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CN104661177B
CN104661177B CN201510110158.9A CN201510110158A CN104661177B CN 104661177 B CN104661177 B CN 104661177B CN 201510110158 A CN201510110158 A CN 201510110158A CN 104661177 B CN104661177 B CN 104661177B
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terminals
group information
group
current
adjacent cell
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CN104661177A (en
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雷艺学
郑倩
张晨璐
张云飞
玛莉
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Shenzhen Coolpad Technologies Co Ltd
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Shenzhen Coolpad Technologies Co Ltd
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Priority to PCT/CN2015/080408 priority patent/WO2016141636A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

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Abstract

The embodiment of the invention discloses a kind of method, system and equipment for realizing D2D communications, is used for realization in the case of having different districts D2D terminals in same group, and existing half-duplex operation constraint can be met by carrying out D2D communications.The present invention includes：Current D2D terminals obtain the group information of adjacent cell D2D terminals, and the current D2D terminals belong to the same group in preset range with adjacent cell D2D terminals, and the group information includes at least the group for having the affiliated group of adjacent cell D2D terminals and identifies；The group information is sent to serving BS by the current D2D terminals, so that the serving BS determines scheduling strategy according to the group information, and when the current D2D terminals send data, data are sent according to the scheduling strategy scheduling current D2D terminals, and data are not sent according to the adjacent cell D2D terminal of the scheduling strategy when the current D2D terminals send data in same group.

Description

A kind of method, system and equipment for realizing D2D communications
Technical field
The present invention relates to wireless communication technology field, and in particular to one kind realizes device-to-device (Device to Device, abbreviation D2D) communication method, system and equipment.
Background technology
D2D communication be third generation cooperative partner program (the 3rd Generation Partnership Project, Abbreviation 3GPP) introduce the communication technology, in Long Term Evolution (Long Term Evolution, abbreviation LTE) network architecture, it Allow in cellular network at a distance of two nearer terminals between each other directly by specific channel communication, to improve spectrum utilization Rate and network capacity.Wherein, D2D communications use identical resource with cellular cell terminal, and the terminal for carrying out D2D communications equally exists Under the control of cell base station, transmission power to be communicated by the resource and control D2D of cell base station distribution D2D communications etc., to protect D2D communications are demonstrate,proved to disturb in tolerance interval caused by cell existing communication.
Define that the terminal of same group within a preset range can only be by the same time in D2D communication specifications One terminal sends data, receives data and does not limit then.Wherein, based on above-mentioned D2D communication specifications, if in same group Terminal belong to same cell, then cell base station can then control more conveniently at the same time it is interior only one Terminal sends data.If the terminal in same group belongs to different districts, cell base station only knows the communication of oneself cell Situation, the signal intelligence without knowing other cells, it is likely that occur that multiple terminals in same group are sent at the same time Data, and there is presently no scheme this is solved the problems, such as on the premise of above-mentioned D2D communication specifications are met.
The content of the invention
An embodiment of the present invention provides one kind to realize D2D communication means, system and equipment, has to realize in same group In the case of having different districts D2D terminals, existing half-duplex operation constraint can be met by carrying out D2D communications, avoid data from connecing Failure is received, improves the reliability of data transfer in D2D communications.
First aspect present invention provides a kind of method for realizing D2D communications, applied to end side, it may include：
Current D2D terminals obtain the group information of adjacent cell D2D terminals, and above-mentioned current D2D terminals and above-mentioned adjacent cell D2D are whole End belongs to the same group in preset range, and above-mentioned group information, which includes at least, the above-mentioned affiliated group of adjacent cell D2D terminals Group mark；
Above-mentioned group information is sent to serving BS by above-mentioned current D2D terminals, so that above-mentioned serving BS is according to above-mentioned group Information determines scheduling strategy, and when above-mentioned current D2D terminals send data, it is above-mentioned current according to the scheduling of above-mentioned scheduling strategy D2D terminals send data, and according to above-mentioned scheduling strategy when above-mentioned current D2D terminals send data it is above-mentioned in same group Adjacent cell D2D terminals do not send data.
Second aspect of the present invention provides a kind of method for realizing D2D communications, applied to base station side, it may include：
Serving BS receives the group information for the adjacent cell D2D terminals that current D2D terminals are sent, above-mentioned current D2D terminals and Above-mentioned adjacent cell D2D terminals belong to the same group in preset range, and above-mentioned group information, which includes at least, above-mentioned adjacent cell D2D The group mark of the affiliated group of terminal；
Above-mentioned serving BS determines scheduling strategy according to above-mentioned group information；
When above-mentioned current D2D terminals send data, above-mentioned serving BS is above-mentioned current according to the scheduling of above-mentioned scheduling strategy D2D terminals send data, and according to above-mentioned scheduling strategy when above-mentioned current D2D terminals send data it is above-mentioned in same group Adjacent cell D2D terminals do not send data.
Third aspect present invention provides a kind of information acquisition method, it may include：
The group information of group, above-mentioned group information include at least the group mark for having group belonging to the acquisition of device-to-device D2D terminals Know；
Above-mentioned group information write-in D2D is had found message by above-mentioned D2D terminals, and above-mentioned D2D has found that message includes above-mentioned group information；
Broadcast them D2D has found message to above-mentioned D2D terminals within a preset range.
Fourth aspect present invention provides a kind of information acquisition method, it may include：
The D2D of other D2D terminal broadcasts has found message, above-mentioned D2D hairs in device-to-device D2D terminal monitoring preset ranges Existing message includes group information, and above-mentioned group information includes at least the group for having above-mentioned other affiliated groups of D2D terminals and identifies；
Above-mentioned D2D terminals find that message obtains above-mentioned group information from above-mentioned D2D.
Fifth aspect present invention provides a kind of D2D terminals, it may include：
First acquisition module, for obtaining the group information of the adjacent cell D2D terminals in the same group in preset range, Above-mentioned group information includes at least the group for having the above-mentioned affiliated group of adjacent cell D2D terminals and identifies；
First sending module, for above-mentioned group information to be sent to serving BS, so that above-mentioned serving BS is according to above-mentioned Group information determines scheduling strategy, and when above-mentioned current D2D terminals send data, it is above-mentioned current according to the scheduling of above-mentioned scheduling strategy D2D terminals send data, and when above-mentioned current D2D terminals send data, above-mentioned adjacent cell D2D is whole according to above-mentioned scheduling strategy End does not send data.
Sixth aspect present invention provides a kind of D2D terminals, it may include：
3rd acquisition module, for obtaining the group information of affiliated group, above-mentioned group information includes at least the group mark for having group Know；
3rd writing module, for above-mentioned group information write-in D2D to be had found message, it is above-mentioned that above-mentioned D2D has found that message includes Group information；
3rd broadcast module, message is found for broadcast them D2D within a preset range.
Seventh aspect present invention provides a kind of D2D terminals, it may include：
4th monitors module, and the D2D for other D2D terminal broadcasts in the range of preset monitored has found message, above-mentioned D2D hairs Existing message includes group information, and above-mentioned group information includes at least the group for having above-mentioned other affiliated groups of D2D terminals and identifies；
4th acquisition module, the above-mentioned D2D listened to from above-mentioned message monitoring module have found that message obtains above-mentioned group information.
Eighth aspect present invention provides a kind of base station, it may include：
5th receiving module, the group information of the adjacent cell D2D terminals sent for receiving current D2D terminals are above-mentioned current D2D terminals and above-mentioned adjacent cell D2D terminals belong to the same group in preset range, and above-mentioned group information is above-mentioned including at least having The group mark of the affiliated group of adjacent cell D2D terminals；
5th determining module, for determining scheduling strategy according to above-mentioned group information；
Scheduler module, for when above-mentioned current D2D terminals send data, being dispatched according to above-mentioned scheduling strategy above-mentioned current D2D terminals send data, and when above-mentioned current D2D terminals send data, above-mentioned adjacent cell D2D is whole according to above-mentioned scheduling strategy End does not send data.
Ninth aspect present invention provides a kind of system for realizing D2D communications, it may include：What above-mentioned 5th aspect provided D2D terminals, and the base station that above-mentioned eighth aspect provides.
As can be seen from the above technical solutions, the method provided in an embodiment of the present invention for realizing device-to-device D2D communications In, the group information of the adjacent cell terminal obtained in its same group, the group information are included adjacent cell by current D2D terminals The group mark of the affiliated group of D2D terminals, then the group information is sent to serving BS by D2D terminals.Since group information includes The group mark of the affiliated group of adjacent cell D2D terminals, therefore, serving BS can be according to group informations in same group but respectively Current D2D terminals and adjacent cell the D2D terminals for belonging to different districts determine a scheduling strategy, and then in current D2D terminals When sending data, adjacent cell D2D terminals can be controlled not send data at the same time, meet existing half-duplex constraint, so that Obtain in preset range and send data in only one D2D terminals at the same time in same group, avoid data receiver from failing, carry The reliability of high data transfer.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, it will make below to required in the embodiment of the present invention Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for For those of ordinary skill in the art, without creative efforts, other can also be obtained according to these attached drawings Attached drawing.
Fig. 1 is LTE network framework schematic diagram provided in an embodiment of the present invention；
Fig. 2 is the flow diagram of the method provided in an embodiment of the present invention for realizing D2D communications；
Fig. 3 is the flow diagram for the method for realizing D2D communications that another embodiment of the present invention provides；
Fig. 4 is the flow diagram for the method for realizing D2D communications that another embodiment of the present invention provides；
Fig. 5 is the flow diagram for the method for realizing D2D communications that another embodiment of the present invention provides；
Fig. 6 is the flow diagram for the method for realizing D2D communications that another embodiment of the present invention provides；
Fig. 7 is the structure diagram of D2D terminals provided in an embodiment of the present invention；
Fig. 8 a are the structure diagram for the D2D terminals that another embodiment of the present invention provides；
Fig. 8 b are the structure diagram for the D2D terminals that another embodiment of the present invention provides；
Fig. 9 is the structure diagram of base station provided in an embodiment of the present invention；
Figure 10 is the structure diagram of the system provided in an embodiment of the present invention for realizing D2D communications.
Embodiment
An embodiment of the present invention provides a kind of method for realizing D2D communications, with Long Term Evolution (Long Term Evolution, abbreviation LTE) there are the D2D terminal scenes of different districts in same group under the network architecture in preset range Under, realize that same group sends data in same time only one D2D terminals, meet existing half-duplex operation constraint, keep away Exempt from data receiver failure, improve the reliability of data transfer in D2D communications.The embodiment of the present invention further correspondingly provides a kind of realization The system of D2D communications, and D2D terminals and base station.
Goal of the invention, feature, advantage to enable the present invention is more obvious and understandable, below in conjunction with the present invention Attached drawing in embodiment, is clearly and completely described the technical solution in the embodiment of the present invention, it is clear that disclosed below Embodiment be only part of the embodiment of the present invention, and not all embodiment.Based on the embodiments of the present invention, this area All other embodiment that those of ordinary skill is obtained without making creative work, belongs to protection of the present invention Scope.
Term " first ", " second ", " the 3rd " in description and claims of this specification and above-mentioned attached drawing, " Four ", " 5th " etc. is for distinguishing different objects, rather than for describing specific order.In addition term " comprising " and " tool Have " and their any deformations, it is intended that cover non-exclusive include.Such as contain the mistake of series of steps or module The step of journey, method, system, product or equipment are not limited to list or module, but the step of may include not list Or module.
It is described in detail individually below.
Some possible application scenarios that Fig. 1 is related to the technical solution of the embodiment of the present invention are combined first carries out citing Jie Continue.Fig. 1 is a kind of LTE network framework schematic diagram provided in an embodiment of the present invention.
As shown by way of example in fig. 1, which includes：In core net (Core Network, abbreviation CN) if under include Dry evolved base station (evolved Node B, abbreviation eNB), in Fig. 1 by taking eNB1 and eNB2 as an example.Group B includes 3 user's ends Hold (User Equipment, abbreviation UE), respectively UE1, UE2 and UE3, wherein, UE1 is operated in the cell A1 of eNB1 coverings Under, UE2 and UE3 are operated under the cell A2 of eNB2 coverings, and UE1, UE2 and UE3 are respectively provided with D2D communication capacities, therefore, UE1, UE2 and UE3 is the D2D terminals alleged by the present invention.
It should be noted that preset range provided by the invention is generally according to the transmission power and receiving ability of D2D terminals To divide, and group refers to the working group divided according to business/user's signing.
Below based on the framework shown in Fig. 1, that introduces that inventor analyzes and researches out is likely to form in preset range Difference UE sends data at the same time in same group, be unsatisfactory for existing half-duplex operation and caused by data receiver failure feelings Condition.
Since UE1 in eNB1 the cell A1, UE2 and UE3 covered only knows it in eNB2 the cell A2, eNB covered The signal intelligence of the UE in cell under covering, therefore, eNB1 only knows the signal intelligence of UE1, and eNB2 only knows UE2 and UE3 Signal intelligence.ENB2 can only control UE2 and UE3 sending data at the same time, but any one in UE2 and UE3 It is a when sending data, possible UE1 also send data.
However, be directed to D2D communications, network side is the different time/frequency source block of different group allocations, the UE in group D2D communications can be carried out using the time/frequency source block of distribution.Due to interior at the same time, when a UE in group has been used Frequency resource block, then other UE the time/frequency source block can not be then used within the period, otherwise cause recipient receive data lose Lose.But above-mentioned eNB1 and eNB2 may dispatch UE at the same time and carry out data sending, cause different UE to send data at the same time, so as to make Fail into data receiver.
The technical solution emphasis of the embodiment of the present invention probes into some groups within a preset range that there are the D2D of different districts Under the scene of terminal, how to avoid may because the D2D terminal different by different base station schedulings sends data and caused by it is same The situation that time memory sends data in different D2D terminals occurs, and meets existing half-duplex operation constraint, and then improve The reliability of data transfer in D2D communications.
In addition, providing a kind of D2D terminal discovery mechanisms of enhancing in this programme, i.e., find message in the D2D of D2D terminals Middle increase group information field, it is default can make it that D2D terminals are obtained by the D2D terminals discovery mechanism of enhancing when necessary In the range of other D2D terminals group information.
First simply introduce how this programme by the D2D terminals discovery mechanism of enhancing obtains group information below.
In some embodiments of the invention, a kind of information acquisition method includes：Group belonging to the acquisition of device-to-device D2D terminals The group information of group, above-mentioned group information include at least the group for having group and identify；Above-mentioned D2D terminals send out above-mentioned group information write-in D2D Existing message, above-mentioned D2D have found that message includes above-mentioned group information；The above-mentioned above-mentioned D2D of D2D terminal broadcasts has found message.
Wherein, the group information of respective group is written to D2D and found in message by D2D terminals, is then broadcasted the D2D and is found to disappear Breath, and then other D2D terminals not only can find that message determines whether it is D2D terminals according to D2D, moreover it is possible to get a group letter Breath, its affiliated group is determined according to group information.
In some embodiments of the invention, a kind of information acquisition method includes：Device-to-device D2D terminal monitorings are other The D2D of D2D terminal broadcasts has found message, and above-mentioned D2D has found that message includes group information, and above-mentioned group information is above-mentioned including at least having The group mark of other affiliated groups of D2D terminals；Above-mentioned D2D terminals find that message obtains above-mentioned group information from above-mentioned D2D.
Wherein, D2D terminals find message by the D2D of other D2D terminal broadcasts in the range of preset monitored, so as to Group information in message is found according to D2D.
Based on described above, the present invention realizes one embodiment of the method for D2D communications, it may include：Current D2D terminals obtain The group information of adjacent cell D2D terminals is taken, above-mentioned current D2D terminals belong to same in preset range with above-mentioned adjacent cell D2D terminals One group, above-mentioned group information include at least the group for having the above-mentioned affiliated group of adjacent cell D2D terminals and identify；Above-mentioned current D2D is whole Above-mentioned group information is sent to serving BS by end, so that above-mentioned serving BS determines scheduling strategy according to above-mentioned group information, and When above-mentioned current D2D terminals send data, according to the above-mentioned scheduling strategy scheduling current D2D terminals transmission data, and according to Scheduling strategy adjacent cell D2D terminals when the current D2D terminals send data do not send data.
Referring to Fig. 2, Fig. 2 is the flow diagram of the method provided in an embodiment of the present invention for realizing D2D communications；Wherein, A kind of method for realizing D2D communications that one embodiment of the present of invention provides may include herein below：
201st, current D2D terminals obtain the group information of adjacent cell D2D terminals, above-mentioned current D2D terminals and above-mentioned adjacent cell D2D terminals belong to the same group in preset range, and above-mentioned group information, which includes at least, group belonging to above-mentioned adjacent cell D2D terminals The group mark of group；
In some embodiments of the invention, by the D2D terminal discovery mechanisms of the enhancing of above-mentioned offer, i.e., D2D's D2D has found increase group information field in message, and D2D terminals can be caused to be found when necessary by the D2D terminals of enhancing Mechanism obtains the group information of adjacent cell D2D terminals in the same group in preset range.
In other embodiments of the present invention, network side carries out group's running time-frequency resource configuration to group in advance, as not Same group configures different running time-frequency resources, then has the running time-frequency resource of the group information of D2D terminals and its group and reflects Penetrate relation.
Therefore, in some embodiments of the invention, current D2D terminals can find to disappear from the D2D of adjacent cell D2D terminals Group information is obtained in breath；Or group information is obtained according to the running time-frequency resource of group.Certainly, in embodiments of the present invention can also be with Other manner indicates group information to D2D terminals, and correspondingly, current D2D terminals can obtain group information in a corresponding way.
Wherein, above-mentioned current D2D terminals obtain the group information of adjacent cell D2D terminals, can include：Above-mentioned current D2D is whole The first D2D that other D2D terminals are sent in the range of preset monitored is held to find message, above-mentioned first D2D has found that message includes group Information；Above-mentioned current D2D terminals obtain group information from above-mentioned first D2D discovery message, and according to included by above-mentioned group information Cell ID, determine adjacent cell D2D terminals from above-mentioned other D2D terminals；Above-mentioned current D2D terminals are from above-mentioned adjacent cell First D2D of D2D terminals has found that message obtains group information.
Group information increase is found that the mode in message is adapted to group relatively more in D2D, and is the scene of dynamic group, such as The current D2D terminals of fruit had carried out D2D in data sending is carried out for the previous period and had found, then need not be for data sending And D2D discoveries are triggered again, avoid D2D from finding that message is frequently triggered.
Wherein, above-mentioned current D2D terminals obtain the group information of adjacent cell D2D terminals, can also include：Above-mentioned current D2D The 2nd D2D that other D2D terminals are sent in terminal monitoring preset range has found message, and should according to above-mentioned other D2D terminal-pairs Cell running time-frequency resource, determine adjacent cell D2D terminals from above-mentioned other D2D terminals；Above-mentioned current D2D terminals obtain above-mentioned Adjacent cell D2D terminals send group's running time-frequency resource that above-mentioned 2nd D2D has found message, are obtained according to above-mentioned group's running time-frequency resource The group information of adjacent cell D2D terminals is stated, there is mapping to close for above-mentioned group's running time-frequency resource and the group information of above-mentioned adjacent cell D2D terminals System.
It is different from the above-mentioned group information that increases in D2D has found message, it is fewer in group, and group is relatively in static state In the case of, network side may indicate group information by way of configuring different running time-frequency resources for different groups so that special The D2D terminals of grouping group use different running time-frequency resources.
It is understood that in some embodiments of the invention, current D2D terminals are capable of determining that adjacent cell D2D ends End, is then sent to serving BS by adjacent cell D2D terminals, alternatively, current D2D terminals will can also listen in preset range The group informations of all other D2D terminals be transmitted directly to serving BS, adjacent cell D2D terminals are determined by serving BS.
202nd, above-mentioned group information is sent to serving BS by above-mentioned current D2D terminals, so that above-mentioned serving BS is according to upper State group information and determine scheduling strategy, and when above-mentioned current D2D terminals send data, work as according to the scheduling of above-mentioned scheduling strategy is above-mentioned Preceding D2D terminals send data, and according to above-mentioned scheduling strategy when above-mentioned current D2D terminals send data it is upper in same group State adjacent cell D2D terminals and do not send data.
The group information of the adjacent cell terminal obtained in its same group, the group information are included neighbour by current D2D terminals The group mark of the affiliated group of cell D2D terminals, then the group information is sent to serving BS by D2D terminals.Due to group information bag Include the group mark of the affiliated group of adjacent cell D2D terminals, therefore, serving BS can according to group information in same group but Current D2D terminals and adjacent cell the D2D terminals for being belonging respectively to different districts determine a scheduling strategy, and then in current D2D When terminal sends data, adjacent cell D2D terminals can be controlled not send data at the same time, meet existing half-duplex constraint, so that So that same group sends data in only one D2D terminals at the same time in preset range, avoid data receiver from failing, carry The high reliability of data transfer.
In some embodiments of the invention, above-mentioned group information is sent to serving BS by above-mentioned current D2D terminals to wrap Include：Above-mentioned group information is write preset the first wireless heterogeneous networks (Radio Resource by above-mentioned current D2D terminals Control, abbreviation RRC) signaling, and the first RRC signaling for writing above-mentioned group information is sent to serving BS；It is alternatively, above-mentioned Current D2D terminals generate customized second RRC signaling, and above-mentioned group information is write above-mentioned second RRC signaling, and by write-in The second RRC signaling for stating group information is sent to serving BS.
Wherein it is possible to be directly to send group information using existing RRC signaling, i.e., group information is written to RRC signaling In, of course, it is possible in addition generate a customized RRC signaling to send group information, then group information is written to new RRC It is transmitted in signaling.
It is understood that RRC signaling has more preferable scalability, simultaneously as need not in the solution of the present invention When each D2D terminals send data, all scheduling strategy of progress is definite, therefore the delay of RRC signaling can meet this The demand of kind processing mode.Preferred RRC signaling sends group information in the embodiment of the present invention, but is not precluded from MAC signalings and also may be used With for sending group information.
The present invention realizes another embodiment of the method for D2D communications, it may include：Serving BS receives current D2D terminals The group information of the adjacent cell D2D terminals of transmission, above-mentioned current D2D terminals and above-mentioned adjacent cell D2D terminals belong in preset range Same group, above-mentioned group information include at least have the above-mentioned affiliated group of adjacent cell D2D terminals group identify；Serving BS root Scheduling strategy is determined according to above-mentioned group information, and when above-mentioned current D2D terminals send data, above-mentioned serving BS is according to above-mentioned scheduling The above-mentioned current D2D terminals of strategy scheduling send data, and according to above-mentioned scheduling strategy when above-mentioned current D2D terminals send data Above-mentioned adjacent cell D2D terminals in same group do not send data.
Referring to Fig. 3, the flow diagram for the method for realizing D2D communications that Fig. 3, which is another embodiment of the present invention, to be provided；Its In, a kind of method for realizing D2D communications that one embodiment of the present of invention provides may include herein below：
301st, serving BS receives the group information for the adjacent cell D2D terminals that current D2D terminals are sent, and above-mentioned current D2D is whole End and above-mentioned adjacent cell D2D terminals belong to same group in preset range, and above-mentioned group information, which includes at least, above-mentioned adjacent cell The group mark of the affiliated group of D2D terminals；
302nd, above-mentioned group information is sent to the corresponding serving BS of above-mentioned adjacent cell D2D terminals by above-mentioned serving BS, and According to above-mentioned group information, serving BS corresponding with above-mentioned adjacent cell D2D terminals consults scheduling strategy；
Wherein, serving BS is after current D2D terminals receive the group information of adjacent cell D2D terminals, then by group information It is sent to the serving BS of adjacent cell D2D terminals, the affiliated group that the serving BSs of adjacent cell D2D terminals includes according to group information The group mark of group, understands the group where it.And then serving BS serving BS corresponding with adjacent cell D2D terminals negotiates tune Degree strategy, the scheduling strategy are mainly used to avoid different D2D terminals to send data in the same time.
It is understood that since network side is that distinct group group is configured with different running time-frequency resources, the D2D in the group is whole End can carry out D2D communications using the running time-frequency resource, and therefore, the scheduling strategy is specifically when in use in the time-domain of frequency resource Stagger, avoid current D2D communications and adjacent cell D2D communications from being clashed in time-domain.
It is to be appreciated that for example, UE3, UE1, UE2 and UE3 under the UE2 under the UE1 under the A of base station, base station B, base station C Belong to same group, UE1 obtains the group information of UE2 and UE3 respectively, is then sent to base station A, and base station A is by the group information of UE2 Base station B is sent to, the group information of UE3 is sent to base station C by base station A again, and then, scheduling plan is negotiated between base station A and base station B Slightly A, scheduling strategy A are used to control when UE1 sends data, and UE2 does not send data, and vice versa.Meanwhile base station A and base Standing and scheduling strategy B is negotiated between C, scheduling strategy B is used to control when UE1 sends data, and UE3 does not send data, otherwise also So.At this time it is noted that needing to meet in UE1, UE2 and UE3 that any 2 will not send at the same time between scheduling strategy A and scheduling Data.
It is above-mentioned that above-mentioned group information is sent to the corresponding clothes of above-mentioned adjacent cell D2D terminals in some embodiments of the invention Business base station includes：The group information is sent to by the corresponding serving BS of the adjacent cell D2D terminals by X2 interface message.
303rd, when above-mentioned current D2D terminals send data, above-mentioned serving BS is dispatched above-mentioned according to above-mentioned scheduling strategy Current D2D terminals send data, and according to above-mentioned scheduling strategy when above-mentioned current D2D terminals send data above-mentioned adjacent cell D2D terminals do not send data.
In the above-described embodiments, the group information of adjacent cell D2D terminals is sent to its corresponding serving BS by serving BS, Then scheduling strategy is negotiated, so that only having 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 for realizing D2D communications, it may include：
401st, serving BS receives the group information for the adjacent cell D2D terminals that current D2D terminals are sent, and above-mentioned current D2D is whole End and above-mentioned adjacent cell D2D terminals belong to the same group in preset range, and above-mentioned group information is small including at least there is above-mentioned neighbour The group mark of the affiliated group of D2D terminals of area；
402nd, above-mentioned group information is sent to network side entity by above-mentioned serving BS, so that above-mentioned network side entity is according to upper State group information and determine scheduling strategy；
Above-mentioned network side entity can be ProSe Function, mobile management entity (Mobility Managenment Entity, abbreviation MME) etc., it is not limited thereto.
It is above-mentioned above-mentioned group information is sent to network side entity to include in some embodiments of the invention：Pass through S1 message Above-mentioned group information is sent to network side entity.
403rd, when above-mentioned current D2D terminals send data, above-mentioned serving BS is dispatched above-mentioned according to above-mentioned scheduling strategy Current D2D terminals send data, and according to above-mentioned scheduling strategy when above-mentioned current D2D terminals send data above-mentioned adjacent cell D2D terminals do not send data.
In the above-described embodiments, scheduling strategy is determined by network side entity, is managed collectively, is adapted to compared with multigroup Group, and there is the scene of the D2D terminals of more different districts in group.
For ease of being better understood from and implementing the such scheme of the embodiment of the present invention, below by illustrating, some specifically should Illustrated with scene.
Wherein, carried out first below exemplified by implementing method corresponding to Fig. 2 and Fig. 3 in the LTE network framework shown in Fig. 1 Description.
Referring to Fig. 5, Fig. 5 is the flow for the method that the another kind that an alternative embodiment of the invention provides realizes D2D communications Schematic diagram.Wherein, the another kind that an alternative embodiment of the invention provides realizes that the method for D2D communications may include herein below：
501st, 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 Know.
502nd, the group information of UE2 and UE3 are sent to eNB1 by UE1；
503rd, the group information of above-mentioned UE2 and UE3 is sent to eNB2 by eNB1 by X2 interface message；
504th, scheduling strategy is consulted according to the group information of above-mentioned UE2 and UE3, eNB1 and eNB2；
Wherein, after the group information of UE2 and UE3 is sent to eNB2 by eNB1, eNB1 and eNB2 hold consultation, the scheduling of negotiation How strategy is specifically avoided when UE1 sends data, and UE2 and UE3 do not send data, or in UE2 and UE3 any one When sending data, UE1 does not send data.And UE2 and UE3 can then be directly controlled by eNB2 so that they are not at the same time Interior transmission data.
505th, when UE1 sends data, eNB1 is according to scheduling strategy, and scheduling UE1 sends data, and UE2 and UE3 are equal at this time Do not send data.
Referring to Fig. 6, Fig. 6 is that the flow for the method that the another kind that another embodiment of the present invention provides realizes D2D communications is shown It is intended to.Wherein, the another kind that an alternative embodiment of the invention provides realizes that the method for D2D communications may include herein below：
601st, UE1 obtains the group information of UE2 and UE3, and UE2 obtains the group information of UE1, and UE3 obtains the group letter of UE1 Breath；
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 Know, the group information of UE1 includes the group mark of group B.
602nd, 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 UE3 will The group information of UE1 is sent to eNB2；
603rd, 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；
604th, MME determines scheduling strategy according to the group information of above-mentioned UE1, UE2 and UE3；
Wherein, after the group information of UE2 and UE3 is sent to MME by UE1, MME determines scheduling strategy, specifically how to avoid When UE1 sends data, UE2 and UE3 do not send data, or in UE2 and UE3 during any one transmission data, UE1 is not sent out Send data.And UE2 and UE3 can then be directly controlled by eNB2 so that they are not in interior transmission data at the same time.
605th, when UE1 sends data, eNB1 dispatches UE1 according to scheduling strategy and sends data, equally, is sent out in UE2 or UE3 Data are sent, eNB1 dispatches UE2 or UE3 according to scheduling strategy and sends data.
In the above-described embodiments, group information is sent to network side entity MME by eNB, by MME unifications according to group information come really A scheduling strategy is made, scheduling strategy is then handed down to eNB, eNB then can send number according to scheduling strategy to dispatch UE According to.
Referring to Fig. 7, Fig. 7 is the structure diagram of D2D terminals provided in an embodiment of the present invention；It is as shown in fig. 7, a kind of D2D terminals 700, it may include：
First acquisition module 710, the group for obtaining the adjacent cell D2D terminals in the same group in preset range are believed Breath, above-mentioned group information include at least the group for having the above-mentioned affiliated group of adjacent cell D2D terminals and identify；
First sending module 720, for above-mentioned group information to be sent to serving BS, so that above-mentioned serving BS is according to upper State group information and determine scheduling strategy, and when above-mentioned current D2D terminals send data, work as according to the scheduling of above-mentioned scheduling strategy is above-mentioned Preceding D2D terminals send data, and according to above-mentioned scheduling strategy when above-mentioned current D2D terminals send data it is upper in same group State adjacent cell D2D terminals and do not send data.
In some possible embodiments of the invention, above-mentioned group information further includes the small of adjacent cell D2D terminals affiliated subdistrict Area identifies, and therefore, above-mentioned first acquisition module 710 specifically includes：
First monitors module, and message is found for the first D2D that other D2D terminals are sent in the range of preset monitored, above-mentioned First D2D has found that message includes group information；
First determining module, for finding to obtain group information in message from above-mentioned first D2D, and according to above-mentioned group information institute Including cell ID, determine adjacent cell D2D terminals from above-mentioned other D2D terminals；
First information acquisition module, for finding that message obtains group information from the first D2D of above-mentioned adjacent cell D2D terminals.
In other possible embodiments of the invention, the first acquisition module 710 specifically includes：
Second monitors module, and message is found for the 2nd D2D that other D2D terminals are sent in the range of preset monitored；
Second determining module, for according to the corresponding cell running time-frequency resource of above-mentioned other D2D terminals, from above-mentioned other D2D Adjacent cell D2D terminals are determined in terminal；
Second data obtaining module, the group for sending above-mentioned 2nd D2D for obtaining above-mentioned adjacent cell D2D terminals and finding message Group running time-frequency resource, the group information of above-mentioned adjacent cell D2D terminals, above-mentioned group's running time-frequency resource are obtained according to above-mentioned group's running time-frequency resource With the group informations of above-mentioned adjacent cell D2D terminals have mapping relations,
Alternatively, above-mentioned first sending module 720 is specifically used for the first wireless money for presetting the write-in of above-mentioned group information Source controls RRC signaling, and the first RRC signaling for writing above-mentioned group information is sent to serving BS；
Alternatively, above-mentioned first sending module 720 is specifically used for generating customized second RRC signaling, and above-mentioned group is believed Breath writes above-mentioned second RRC signaling, and the second RRC signaling for writing above-mentioned group information is sent to serving BS.
Fig. 8 a are referred to, Fig. 8 a are that the structure of the corresponding D2D terminals of information acquisition method provided in an embodiment of the present invention is shown It is intended to, as shown in Figure 8 a, a kind of D2D terminals include：
3rd acquisition module 810, for obtaining the group information of affiliated group, above-mentioned group information includes at least the group for having group Mark；
3rd writing module 820, for above-mentioned group information write-in D2D to be had found message, it is upper that above-mentioned D2D has found that message includes State group information；
3rd broadcast module 830, message is found for broadcast them D2D within a preset range.
Fig. 8 b are referred to, Fig. 8 b are the knot for the corresponding D2D terminals of information acquisition method that another embodiment of the present invention provides Structure schematic diagram, as shown in Figure 8 b, a kind of D2D terminals include：
4th monitors module 840, and the D2D for other D2D terminal broadcasts in the range of preset monitored has found message, above-mentioned D2D has found that message includes group information, and above-mentioned group information includes at least the group for having above-mentioned other affiliated groups of D2D terminals and identifies；
4th acquisition module 850, the above-mentioned D2D listened to from above-mentioned message monitoring module have found that message obtains above-mentioned group of letter Breath.
Referring to Fig. 9, Fig. 9 is the structure diagram of base station provided in an embodiment of the present invention；A kind of as shown in figure 8, base station 900, it may include：
5th receiving module 910, the group information of the adjacent cell D2D terminals sent for receiving current D2D terminals are above-mentioned to work as Preceding D2D terminals and above-mentioned adjacent cell D2D terminals belong to the same group in preset range, and above-mentioned group information is including at least on having State the group mark of the affiliated group of adjacent cell D2D terminals；
5th determining module 920, for determining scheduling strategy according to above-mentioned group information；
Scheduler module 930, for when above-mentioned current D2D terminals send data, being dispatched according to above-mentioned scheduling strategy above-mentioned Current D2D terminals send data, and according to above-mentioned scheduling strategy when above-mentioned current D2D terminals send data in same group Above-mentioned adjacent cell D2D terminals do not send data.
In some possible embodiments of the invention, above-mentioned 5th determining module 920 is specifically used for, and the group information is sent out Give the adjacent cell D2D terminals corresponding serving BS, it is corresponding with the adjacent cell D2D terminals according to the group information Serving BS consults scheduling strategy.
In some possible embodiments of the invention, above-mentioned 5th determining module 920 is specifically used for, and the group information is sent out Network side entity is given, so that the network side entity determines scheduling strategy according to the group information.
Preferably, above-mentioned 3rd sending module is specifically used for above-mentioned group information is sent to above-mentioned neighbour by X2 interface message The corresponding serving BS of cell D2D terminals.
Preferably, above-mentioned 4th sending module is specifically used for above-mentioned group information is sent to network side reality by S1 message Body.
Referring to Fig. 10, Figure 10 is the system provided in an embodiment of the present invention for realizing D2D communications, including the D2D shown in Fig. 7 Terminal 700 and the base station 900 shown in Fig. 9.
Wherein, attached drawing 7 is referred to the introduction of D2D terminals and attached drawing 9 to base station, and details are not described herein.
In the above-described embodiments, the description to each embodiment all emphasizes particularly on different fields, and does not have the portion being described in detail in some embodiment Point, it may refer to the associated description of other embodiment.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description, The specific work process of device and unit, may be referred to the corresponding process in preceding method embodiment, details are not described herein.
In several embodiments provided herein, it should be understood that disclosed system, apparatus and method can be with Realize by another way.For example, device embodiment described above is only schematical, for example, the unit Division, is only a kind of division of logic function, can there is other dividing mode, such as multiple units or component when actually realizing Another system can be combined or be desirably integrated into, or some features can be ignored, or do not perform.It is another, it is shown or The mutual coupling, direct-coupling or communication connection discussed can be the indirect coupling by some interfaces, device or unit Close or communicate to connect, can be electrical, machinery or other forms.
The unit illustrated as separating component may or may not be physically separate, be shown as unit The component shown may or may not be physical location, you can with positioned at a place, or can also be distributed to multiple In network unit.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs 's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can also That unit is individually physically present, can also two or more units integrate in a unit.Above-mentioned integrated list Member can both be realized in the form of hardware, can also be realized in the form of SFU software functional unit.
If the integrated unit is realized in the form of SFU software functional unit and is used as independent production marketing or use When, it can be stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially The part to contribute in other words to the prior art or all or part of the technical solution can be in the form of software products Embody, which is stored in a storage medium, including some instructions are used so that a computer Equipment (can be personal computer, server, or serving BS etc.) performs the complete of each embodiment the method for the present invention Portion or part steps.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can store journey The medium of sequence code.
A kind of method, system and equipment for realizing D2D communications provided by the present invention is described in detail above, it is right In those of ordinary skill in the art, according to the thought of the embodiment of the present invention, can in specific embodiments and applications There is change part, in conclusion this specification content should not be construed as limiting the invention.

Claims (17)

  1. A kind of 1. method for realizing D2D communications, applied to end side, it is characterised in that including：
    Current D2D terminals obtain the group information of adjacent cell D2D terminals, the current D2D terminals and the adjacent cell D2D terminal categories In the same group in preset range, the group information includes at least the group mark for having the affiliated group of adjacent cell D2D terminals Know；
    The group information is sent to serving BS by the current D2D terminals, so that the serving BS is according to the group information Determine scheduling strategy, and when the current D2D terminals send data, it is whole according to the scheduling strategy scheduling current D2D End sends data, and the neighbour according to the scheduling strategy when the current D2D terminals send data in same group is small Area's D2D terminals do not send data.
  2. 2. according to the method described in claim 1, it is characterized in that,
    The group information further includes the cell ID of adjacent cell D2D terminals affiliated subdistrict, and the current D2D terminals obtain adjacent cell The group information of D2D terminals includes：
    The first D2D that other D2D terminals are sent in the current D2D terminal monitoring preset ranges has found message, the first D2D It was found that message includes group information；
    The current D2D terminals obtain group information from the first D2D discovery message, and according to included by the group information Cell ID, adjacent cell D2D terminals are determined from other D2D terminals；
    The current D2D terminals find that message obtains group information from the first D2D of the adjacent cell D2D terminals.
  3. 3. according to the method described in claim 1, it is characterized in that,
    The group information that the current D2D terminals obtain adjacent cell D2D terminals includes：
    The 2nd D2D that other D2D terminals are sent in the current D2D terminal monitoring preset ranges has found message, and according to described The corresponding cell running time-frequency resource of other D2D terminals, adjacent cell D2D terminals are determined from other D2D terminals；
    The current D2D terminals obtain the adjacent cell D2D terminals and send group's time-frequency money that the 2nd D2D has found message Source, the group information of the adjacent cell D2D terminals, group's running time-frequency resource and the neighbour are obtained according to group's running time-frequency resource The group information of cell D2D terminals has mapping relations.
  4. 4. according to claims 1 to 3 any one of them method, it is characterised in that
    The group information is sent to serving BS by the current D2D terminals to be included：
    The group information is write the first preset radio resource control RRC signaling by the current D2D terminals, and by described in write-in First RRC signaling of group information is sent to serving BS.
  5. 5. according to claims 1 to 3 any one of them method, it is characterised in that
    The group information is sent to serving BS by the current D2D terminals to be included：
    The current D2D terminals generate customized second RRC signaling, and the group information is write second RRC signaling, and The second RRC signaling for writing the group information is sent to serving BS.
  6. A kind of 6. method for realizing D2D communications, applied to base station side, it is characterised in that including：
    Serving BS receives the group information for the adjacent cell D2D terminals that current D2D terminals are sent, current D2D terminals and described Adjacent cell D2D terminals belong to the same group in preset range, and the group information, which includes at least, the adjacent cell D2D terminals The group mark of affiliated group；
    The serving BS determines scheduling strategy according to the group information；
    When the current D2D terminals send data, the serving BS is whole according to the scheduling strategy scheduling current D2D End sends data, and the neighbour according to the scheduling strategy when the current D2D terminals send data in same group is small Area's D2D terminals do not send data.
  7. 7. according to the method described in claim 6, it is characterized in that,
    The serving BS determines that scheduling strategy includes according to the group information：
    The group information is sent to the corresponding serving BS of the adjacent cell D2D terminals by the serving BS, and according to described Group information, serving BS corresponding with the adjacent cell D2D terminals consult scheduling strategy.
  8. 8. according to the method described in claim 6, it is characterized in that,
    The serving BS determines that scheduling strategy includes according to the group information：
    The group information is sent to network side entity by the serving BS, so that the network side entity is according to the group information Determine scheduling strategy.
  9. A kind of 9. D2D terminals, it is characterised in that including：
    First acquisition module, it is described for obtaining the group information of the adjacent cell D2D terminals in the same group in preset range Group information includes at least the group for having the affiliated group of adjacent cell D2D terminals and identifies；
    First sending module, for the group information to be sent to serving BS, so that the serving BS is according to described group of letter Breath determines scheduling strategy, and when current D2D terminals send data, according to the scheduling strategy scheduling current D2D terminals Data are sent, and the adjacent cell D2D terminals are not sent when the current D2D terminals send data according to the scheduling strategy Data.
  10. 10. D2D terminals according to claim 9, it is characterised in that
    The group information further includes the cell ID of adjacent cell D2D terminals affiliated subdistrict, and first acquisition module includes：
    First monitors module, and message is found for the first D2D that other D2D terminals in the range of preset monitored are sent, and described first D2D has found that message includes group information；
    First determining module, for finding to obtain group information in message from the first D2D, and according to included by the group information Cell ID, determine adjacent cell D2D terminals from other D2D terminals；
    First information acquisition module, for finding that message obtains group information from the first D2D of the adjacent cell D2D terminals.
  11. 11. D2D terminals according to claim 9, it is characterised in that
    First acquisition module includes：
    Second monitors module, and message is found for the 2nd D2D that other D2D terminals are sent in the range of preset monitored；
    Second determining module, for according to the corresponding cell running time-frequency resource of the other D2D terminals, from other D2D terminals In determine adjacent cell D2D terminals；
    Second data obtaining module, when sending the group of the 2nd D2D discoveries message for obtaining the adjacent cell D2D terminals Frequency resource, the group information of the adjacent cell D2D terminals, group's running time-frequency resource and institute are obtained according to group's running time-frequency resource The group information for stating adjacent cell D2D terminals has mapping relations.
  12. 12. according to claim 9~11 any one of them D2D terminals, it is characterised in that
    First sending module is specifically used for writing the group information into the first preset radio resource control RRC signaling, and The first RRC signaling for writing the group information is sent to serving BS.
  13. 13. according to claim 9~11 any one of them D2D terminals, it is characterised in that
    First sending module is specifically used for generating customized second RRC signaling, and the group information is write described second RRC signaling, and the second RRC signaling for writing the group information is sent to serving BS.
  14. A kind of 14. base station, it is characterised in that including：
    5th receiving module, the group information of the adjacent cell D2D terminals sent for receiving current D2D terminals, the current D2D are whole End and the adjacent cell D2D terminals belong to the same group in preset range, and the group information is small including at least there is the neighbour The group mark of the affiliated group of D2D terminals of area；
    5th determining module, for determining scheduling strategy according to the group information；
    Scheduler module, for when the current D2D terminals send data, the current D2D to be dispatched according to the scheduling strategy Terminal sends data, and when the current D2D terminals send data, the adjacent cell D2D terminals are not according to the scheduling strategy Send data.
  15. 15. base station according to claim 14, it is characterised in that
    5th determining module is specifically used for, and the group information is sent to the corresponding service base of the adjacent cell D2D terminals Stand, according to the group information, serving BS corresponding with the adjacent cell D2D terminals consults scheduling strategy.
  16. 16. base station according to claim 14, it is characterised in that
    5th determining module is specifically used for, and the group information is sent to network side entity, so that the network side entity Scheduling strategy is determined according to the group information.
  17. A kind of 17. system for realizing D2D communications, it is characterised in that including claim 9~13 any one of them D2D terminals, And claim 14~16 any one of them base station.
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WO2016191965A1 (en) * 2015-05-29 2016-12-08 华为技术有限公司 Terminal, base station, and resource allocation method
CN107770781B (en) * 2016-08-15 2021-08-27 华为技术有限公司 D2D synchronization signal sending method and device
US20200100255A1 (en) * 2018-09-26 2020-03-26 Qualcomm Incorporated Communication based on radio signal measurements
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