CN104105217A - Method of allocating resources for communication among multiple device-to-devices (D2D) and device - Google Patents

Method of allocating resources for communication among multiple device-to-devices (D2D) and device Download PDF

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Publication number
CN104105217A
CN104105217A CN201310129702.5A CN201310129702A CN104105217A CN 104105217 A CN104105217 A CN 104105217A CN 201310129702 A CN201310129702 A CN 201310129702A CN 104105217 A CN104105217 A CN 104105217A
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China
Prior art keywords
interference
subscriber equipment
base station
value
reception
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CN201310129702.5A
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CN104105217B (en
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徐艳丽
刘勇
李栋
杨凯
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Nokia Shanghai Bell Co Ltd
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Alcatel Lucent Shanghai Bell Co Ltd
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Priority to CN201310129702.5A priority Critical patent/CN104105217B/en
Priority to PCT/IB2014/000655 priority patent/WO2014170750A2/en
Priority to TW103111445A priority patent/TW201505468A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference

Abstract

The invention provides a scheme for allocating resources in a communication system so as to accommodate a plurality of simultaneous D2Ds for communication. Firstly, a base station sends predetermined neighbor distances to all D2D UE in a cell, each D2D UE determines each own neighbor distance and sends the own neighbor distance to the base station on the basis of the received predetermined neighbor distances, and on the basis of the received own neighbor distance from each D2D UE, the base station determines each neighbor distance of each D2D pair. Then, the receiving D2D UE in the D2D pair determines the own interference tolerance value and sends the determined value to the base station, and the received interference tolerance value of the receiving D2D UE serves as the interference tolerance value of the receiving D2D UE belonging to the D2D pair. At last, according to each neighbor information of each D2D pair and the interference tolerance value, all D2D pairs are divided into a plurality of groups on the basis of greedy algorithm, different resources are allocated for each group, and the resources allocated for each D2D pair are informed to each D2D pair.

Description

For multiple device-to-device allocation of communications resource method and apparatus
Technical field
The application relates to communication system, relates in particular to the method and apparatus of for each device-to-device, (Device-to-Device pair) Resources allocation being communicated by letter to hold multiple simultaneous device-to-devices in communication system.
Background technology
Device-to-device (Device-to-Device, D2D) communication is the very promising technology of one, wherein there is subscriber equipment (the user equipment of good communication channel, UE) between, be built into D2D couple, make can directly communicate by letter mutually between them and without the relaying via honeycomb enode (eNB).Thus, the performance of LTE cellular network (for example, throughput and transmission delay) can be improved.Due to above-mentioned advantage, many companies and research institution all attempt D2D communication to introduce LTE cellular network to improve the efficiency of system.At current 3GPP RAN meeting #58, a research project for LTE cellular network is checked and approved in D2D communication.
Coexisting of D2D and honeycomb UEs has two kinds of modes conventionally, (1) D2D and honeycomb UEs shared resource; (2) private resource that D2D distributes with honeycomb eNB communicates, and the resource of this private resource and honeycomb UEs is orthogonal.The second Coexistence mode makes D2D communication bring interests and existing honeycomb UEs is not produced to interference.But, if these D2D are to sharing identical resource, between them, may mutually produce interference so, thereby offset the throughput gain that they bring.On the other hand, if all these D2D are to using orthogonal resource, shortage of resources will become even more serious so.
At present, some existing schemes are all considered the application scenarios of above-mentioned the second Coexistence mode.For example, for the application scenarios of this second Coexistence mode, a kind of scheme (hereafter is " degree of freedom scheme ") is proposed to make multiple D2D become possibility to transmission simultaneously in " Xiaogang R.; Gaohui T.and Zhongpei Z.; The research of IMT-A_3GPP_12108on D2Dgrouping algorithm (in Chinese); Proc.33th conference of IMT-Apromoting group of 3GPP project; Beijing; 2012,1-8. ".In this scheme, there is the D2D of fixed link distance to being divided into many groups, every group uses a resource.D2D is to being arranged grade according to their degree of freedom (also, the neighbours' that D2D is right number), and every pair by Resources allocation in an orderly manner.The number of the resource being assigned with is minimized based on color algorithm (coloring algorithm).
But there is following defect in such scheme:
1. the data rate that most of D2D is right is low.This scheme makes most of D2D to being divided into first group.Therefore, the interference maximum in first group, wherein D2D link more easily interrupts, and causes poor throughput.
2. do not consider summation interference (sum-interference).Due to jamming pattern be draw by paired model (pairwise model) and be left in the basket from the gross effect of the interference of every other transmission link, therefore, it fails to realize the target data rate of D2D communication.
The distance of 3.D2D link is assumed that all identical.In real wireless environment, the distance of D2D link is normally different each other, and link-quality is subject to the impact of its distance.Therefore, better scheme need to be considered their distance and link-quality.
Another kind of scheme is randomizing scheme.In this randomizing scheme, each resource is tending towards holding the D2D couple of same number.Therefore,, if do not consider the independent link-quality that D2D is right, this scheme can obtain good throughput so.But this randomizing scheme consumes more resource.
Therefore, how effectively D2D communication being introduced to cellular network, also obtain higher throughput with less private resource, is a problem being badly in need of solution.
Summary of the invention
The present invention aims to provide a kind of scheme that can hold simultaneous multiple D2D communications in LTE cellular network.
Suppose to have disposed randomly in cellular cell of the present invention multiple UEs.If the wireless link between the UEs of intercommunication is enough good mutually, between them, form so D2D couple.D2D is to the resource transmission data of distributing via eNB, and two UEs of a D2D centering can not send data simultaneously.Therefore, by each D2D, to being used as a summit (Vertex), and the transmission UE of its hypothesis on location by this D2D centering determines.Right UEs is called as honeycomb UEs in this community, not to be selected as D2D, and it is via transmitting data with the mutually orthogonal resource of the right resource of D2D.Therefore, in the present invention, honeycomb UEs on D2D on the impact of performance can ignore.
Technical scheme of the present invention is intended to realize following two targets: (1) maximizes the resource efficiency that these D2D are right, also, maximizes the throughput of multiple D2D to every resource; (2) each D2D to meeting Signal to Interference plus Noise Ratio (SINR) thus demand realize certain service quality (QoS).
In order to realize above-mentioned target, according to an aspect of the present invention, proposed a kind of in the base station of communication system the method for Resources allocation, wherein, in the coverage of described base station, comprise multiple D2D couple, each D2D, to comprising two D2D subscriber equipmenies, said method comprising the steps of: i. sends predetermined neighbours' distance to all D2D subscriber equipmenies in this base station range; Ii. receive the neighbor information separately from described all D2D subscriber equipmenies; Iii. according to the neighbor information separately of described all D2D subscriber equipmenies, determine the neighbor information separately that described multiple D2D is right; Iv. obtain the value of the interference-tolerant degree separately that described multiple D2D is right; V. according to the value of the right neighbor information separately of described multiple D2D and interference-tolerant degree, and based on greedy algorithm, described multiple D2D, to being divided in several groupings, and are distributed to different resources for each grouping, be wherein divided into D2D in same grouping to not being neighbours mutually.Vi. by be described multiple D2D centerings each D2D to distribute resource notification described in each D2D couple.
Favourable, after described step I, further comprising the steps of before described step I v :-reception is from the D2D companion's about these one or more D2D subscriber equipmenies of the one or more D2D subscriber equipmenies in described all D2D subscriber equipmenies query messages;-notify this one or more D2D subscriber equipmenies by the D2D companion's of described one or more D2D subscriber equipmenies information.
Favourable, described step I v comprises the following steps :-obtain the value of the interference-tolerant degree of this reception D2D subscriber equipment from the right reception D2D subscriber equipment of each D2D of described multiple D2D centerings;-value using the value of the interference-tolerant degree of described reception D2D subscriber equipment as the right interference-tolerant degree of the D2D corresponding under this reception D2D subscriber equipment;
Wherein, the value of the interference-tolerant degree of described reception D2D subscriber equipment obtains in the following manner:
-calculate the value of the interference-tolerant degree of described reception D2D subscriber equipment by following formula
Wherein, represent that described reception D2D subscriber equipment receives the received power of useful signal, I from its transmission D2D subscriber equipment 0represent described reception D2D subscriber equipment from its nearest non-neighbours D2D to receiving the received power of signal, N 0represent thermal noise, γ threpresent SINR threshold value, α represents the path loss factor;
-quantize the value of calculated interference-tolerant degree by following formula to obtain the value of the interference-tolerant degree after quantizing
Wherein, M is the number that the D2D in described base station range is right, represent to round downwards.
Favourable, described step I v comprises the following steps :-obtain the value of the interference-tolerant degree of this reception D2D subscriber equipment from the right reception D2D subscriber equipment of each D2D of described multiple D2D centerings, and obtain the value of the interference-tolerant degree of this transmission D2D subscriber equipment from sending D2D subscriber equipment;-using the smaller value in the value of the value of interference-tolerant degree of described reception D2D subscriber equipment and the interference-tolerant degree of described transmission D2D subscriber equipment as this reception D2D subscriber equipment with send the value of the interference-tolerant degree that D2D under D2D subscriber equipment is right;
Wherein, the value of the interference-tolerant degree of described reception D2D subscriber equipment obtains in the following manner:
-calculate the value of the interference-tolerant degree of described reception D2D subscriber equipment by following formula
Wherein, represent that described reception D2D subscriber equipment receives the received power of useful signal, I from its transmission D2D subscriber equipment 0represent described reception D2D subscriber equipment from its nearest non-neighbours D2D to receiving the received power of signal, M 0represent thermal noise, γ threpresent SINR threshold value, α represents the path loss factor;
-quantize the value of calculated interference-tolerant degree by following formula to obtain the value of the interference-tolerant degree after quantizing
Wherein, M is the number that the D2D in described base station range is right, represent to round downwards; And
Wherein, the value of the interference-tolerant degree of described transmission D2D subscriber equipment obtains in the following manner:
-calculate the value of the interference-tolerant degree of described transmission D2D subscriber equipment by following formula
Wherein, represent that described transmission D2D subscriber equipment receives the received power of useful signal, I from its reception D2D subscriber equipment 0represent described transmission D2D subscriber equipment from its nearest non-neighbours D2D to receiving the received power of signal, N 0represent thermal noise, γ threpresent SINR threshold value;
-quantize the value of calculated interference-tolerant degree by following formula to obtain the value of the interference-tolerant degree after quantizing
Wherein, M is the number that the D2D in described base station range is right, represent to round downwards.
Favourable, described step v comprises the following steps: v1. is with the value of the right interference-tolerant degree of each D2D of described multiple D2D centerings, and the plurality of D2D couple of non-descending, to generate D2D pair set after sorted; V2. set up a grouping, and by first D2D in D2D pair set after sorted to putting into this grouping, and by this first D2D to removing from D2D pair set after sorted, to upgrade this D2D pair set; V3. in order from upgrade D2D pair set in select one with this grouping in arbitrary member be not all neighbours' D2D couple, and by selected D2D to putting into this grouping, and from D2D pair set, remove selected D2D to upgrade this D2D pair set, and the value of the interference-tolerant degree of the each member in this grouping is subtracted to 1; V4. repeat above-mentioned steps v3 until the value of the interference-tolerant degree of at least one member in this grouping is less than or equal to zero; V5. with the value of the interference-tolerant degree that in the D2D pair set after upgrading, remaining D2D is right, this remaining D2D couple of non-descending, to generate D2D pair set after sorted; V6. repeat above-mentioned steps v2 to v5 until D2D pair set is sky; V7. for the each grouping in set up multiple groupings distributes different resources.
According to another aspect of the present invention, proposed a kind of in the reception D2D of communication network subscriber equipment the method for assistant base station Resources allocation, wherein, said method comprising the steps of: I. receives from predetermined neighbours' distance of described base station; II. the predetermined neighbours' distance based on received, determines the neighbor information of this reception D2D subscriber equipment; III. determined neighbor information that receives D2D subscriber equipment is sent to described base station; IV. determine the value of the interference-tolerant degree of this reception D2D subscriber equipment, and determined value that receives the interference-tolerant degree of D2D subscriber equipment is sent to described base station; V. receive the resource allocation information from base station.
Favourable, after described step I, further comprising the steps of before described step IV :-judge whether this reception D2D subscriber equipment knows its D2D companion;-if not, send query messages to described base station, for inquiring about the D2D companion of this reception D2D subscriber equipment;-reception is from the D2D companion's of this reception D2D subscriber equipment of described base station information.
Favourable, described step IV comprises the following steps:
-calculate the value of the interference-tolerant degree of this reception D2D subscriber equipment by following formula
Wherein, represent that this reception D2D subscriber equipment receives the received power of useful signal, I from its transmission D2D subscriber equipment 0represent this reception D2D subscriber equipment from its nearest non-neighbours D2D to receiving the received power of signal, N 0represent thermal noise, γ threpresent SINR threshold value, α represents the path loss factor;
-quantize the value of calculated interference-tolerant degree by following formula to obtain the value of the interference-tolerant degree after quantizing
Wherein, M is the number that the D2D in described base station range is right, represent to round downwards.
According to another aspect of the present invention, proposed a kind of in the transmission D2D of communication network subscriber equipment the method for assistant base station Resources allocation, wherein, said method comprising the steps of: A. receives from predetermined neighbours' distance of described base station; B. the predetermined neighbours' distance based on received, determines the neighbor information of this transmission D2D subscriber equipment; C. determined neighbor information that sends D2D subscriber equipment is sent to described base station; E. receive the resource allocation information from base station.
Favourable, after described steps A, further comprising the steps of before described step e :-judge whether this transmission D2D subscriber equipment knows its D2D companion;-if not, send query messages to described base station, for inquiring about the D2D companion of this transmission D2D subscriber equipment;-reception is from the D2D companion's of this transmission D2D subscriber equipment of described base station information.
Favourable, after described step C, further comprising the steps of before described step e: D. determines the value of the interference-tolerant degree of this transmission D2D subscriber equipment, and the value of the interference-tolerant degree of this transmission D2D subscriber equipment is sent to described base station.
Favourable, it is characterized in that, described step D comprises the following steps:
-calculate the value of the interference-tolerant degree of this transmission D2D subscriber equipment by following formula
Wherein, represent that this transmission D2D subscriber equipment receives the received power of useful signal, I from its reception D2D subscriber equipment 0represent this transmission D2D subscriber equipment from its nearest non-neighbours D2D to receiving the received power of signal, N 0represent thermal noise, γ threpresent SINR threshold value;
-quantize the value of calculated interference-tolerant degree by following formula to obtain the value of the interference-tolerant degree after quantizing
Wherein, M is the number that the D2D in described base station range is right, represent to round downwards.
In the technical scheme of the above embodiment of the present invention, because the right neighbours of each D2D in cellular cell are in different groups, therefore, being controlled preferably between D2D.In addition, newly having defined a feedback in technical scheme of the present invention, is also interference-tolerant degree (tolerant interference degree, TID), and it makes to assess D2D, and right summation interference becomes easy.Further, by using TID, signaling consumption and energy consumption are reduced.
By the technical scheme of application the above embodiment of the present invention, first, multiple D2D links can be communicated by letter with the less resource taking simultaneously.Secondly the SINR that, each D2D is right meets the demand of communication.Again, higher resource efficiency has been obtained in cellular cell.
According to another aspect of the present invention, proposed a kind of in the base station of communication system the method for Resources allocation, wherein, in the coverage of described base station, comprise multiple D2D couple, each D2D, to comprising two D2D subscriber equipmenies, said method comprising the steps of: a. sends predetermined cooperation distance and predetermined interference distance to all D2D subscriber equipmenies in this base station range; B. receive cooperation set separately and interference source set from described all D2D subscriber equipmenies; C. according to the cooperation set separately of described all D2D subscriber equipmenies and interference source set, build the right interference figure of described multiple D2D; D. based on described multiple D2D right interference figure and greedy algorithm, and according to the right saturation of described multiple D2D, by described multiple D2D to be divided into several grouping in, and distribute different resources for each grouping, wherein, for certain D2D couple, its saturation represents to be assigned with in its neighbours the right number of D2D of resource; E. by be described multiple D2D centerings each D2D to distribute resource notification described in each D2D couple.
According to another aspect of the present invention, propose a kind of in the D2D of communication network subscriber equipment the method for assistant base station Resources allocation, wherein, said method comprising the steps of: receive from predetermined cooperation distance and the predetermined interference distance of described base station; Based on received predetermined cooperation distance and predetermined interference distance, determine cooperation set and the interference source set of this D2D subscriber equipment; The cooperation set of determined D2D subscriber equipment and interference source set are sent to described base station; Receive the resource allocation information from base station.
In the technical scheme of the above embodiment of the present invention, because mutual interference source is divided in different groupings, therefore, based on interference source set, D2D between Recombinant Interferon α-2b access good control.Further, defined an alternative cooperation set of D2D, it has reduced the hunting zone of eNB and has ensured D2D link-quality.Therefore eNB can adjust this and gathers to make D2D communication to meet application demand and without the signaling consumption that costs a lot of money.
By the technical scheme of application the above embodiment of the present invention, first, multiple D2D links can be communicated by letter with the less resource taking simultaneously.Secondly, each resource is assigned to the D2D couple of similar quantity, and therefore resource is distributed more even.Again, the SINR that D2D is right is improved greatly.
Various aspects of the present invention are by the explanation of the specific embodiment by hereinafter and more clear.
Brief description of the drawings
By reading the detailed description that non-limiting example is done of doing with reference to the following drawings, above-mentioned and other feature of the present invention will become more apparent:
Fig. 1 shows the schematic diagram of multiple D2D to communication in cellular cell according to an embodiment of the invention;
Fig. 2 shows an example of the neighborhood of a UE according to an embodiment of the invention;
Fig. 3 shows an example of the neighborhood that a D2D according to an embodiment of the invention is right;
Fig. 4 shows the method flow diagram of Resources allocation according to an embodiment of the invention;
Fig. 5 shows the example of the neighbor picture of Yi Ge according to an embodiment of the invention community;
Fig. 6 shows the schematic diagram that resource according to an embodiment of the invention is distributed;
Fig. 7 shows the comparison schematic diagram of the quantity of the resource that technical scheme of the present invention and existing two schemes use;
Fig. 8 shows the comparison schematic diagram of the throughput of technical scheme of the present invention and existing two schemes;
Fig. 9 shows the comparison schematic diagram of the resource efficiency of technical scheme of the present invention and existing two schemes;
Figure 10 shows an example of the interference relationships of a UE, and wherein the interference source of UE is arranged in border circular areas;
Figure 11 shows an example of the interference relationships that D2D is right;
Figure 12 shows the method flow diagram of Resources allocation according to another embodiment of the invention;
Figure 13 shows the example of an interference figure that comprises 100 GeD2DDui communities;
Figure 14 shows the schematic diagram to Resources allocation example into the multiple D2D in community;
Figure 15 shows in the time that interference distance is 100m, the comparison schematic diagram of the uniformity of technical scheme of the present invention and existing two schemes;
Figure 16 shows in the time that interference distance is 100m, the comparison schematic diagram of the Signal to Interference plus Noise Ratio of technical scheme of the present invention and existing two schemes;
Figure 17 illustrates and knows clearly in the time that interference distance is 150m, the comparison schematic diagram of the Signal to Interference plus Noise Ratio of technical scheme of the present invention and existing two schemes;
Figure 18 shows in the time that interference distance is 100m, the comparison schematic diagram of the quantity of the resource that technical scheme of the present invention and existing two schemes use.
Accompanying drawing mark identical or similar in accompanying drawing represents identical or similar parts.
Embodiment
Below with reference to accompanying drawing, embodiments of the invention are described.
With reference to Fig. 1, suppose that cellular cell comprises that multiple honeycomb UEs (these honeycombs UEs transmits data by traditional mode) and multiple D2D are to (these D2D directly transmit data to the resource of distributing by eNB).Due to the resource that honeycomb UEs and D2D separate employing, therefore, the phase mutual interference between them herein can be ignored.In D2D communication, communication link is conventionally shorter, and when this makes multiple D2D right, transmission becomes possibility.On the other hand, due to the characteristic of radio broadcasting, may exist D2D between interference.Therefore, need to control interference and ensure multiple D2D effectively introducing the communication requirement of cellular network.
Based on this, the SINR γ at random D2D link v place vshould exceed a given threshold value γ thso that specific QoS to be provided.In addition, the target of resource efficiency is to maximize.These considerations can be modeled as follows:
max r eff = C throughput N resource
s.t.γ v≥γ th (1)
Wherein, r effrepresent resource efficiency, C throughputthe total throughout of multiple D2D pair set Ψ, N resourceit is the stock number using accordingly.Above-mentioned optimal problem can be converted to a suboptimum problem, the stock number that its maximize throughput simultaneous minimization uses.
For maximize throughput, D2D between interference need to be controlled.In wireless environment, each UE has direct link (channel quality between UE is higher than a threshold value) to certain a few UEs, and these UEs are defined as its neighbours.Conventionally, the interference of a UE is assumed that from its neighbours.Herein, suppose for random two UE i and j, if the distance d between them ijbe less than predetermined neighbours apart from d neig, so, phase neighbours each other between them, also:
d ij≤d neig (2)
D neigbe a priori value that is stored in eNB side, its numerical value is greater than the distance of practical communication link conventionally to be disturbed to control.Fig. 2 shows an example of the neighborhood of a UE, and its neighbours are positioned at the circle illustrating.Because each D2D centering once only has UE transmission data, therefore the interference of D2D link is from the right transmission UEs of other D2D.Therefore, each D2D link can be done as a wholely, be represented by summit (Vertex), because the right link range of D2D is shorter.If two UE are neighbours, two of its ownership D2D are to being also neighbours so.Fig. 3 shows an example of the neighborhood that D2D is right.
With reference to Fig. 4, in technical scheme of the present invention, first, in step S41, all D2D in eNBXiang community broadcast predetermined neighbours apart from d to (also, all D2D UE) neig.Then,, in step S42, the predetermined neighbours of each D2D UE of D2D centering based on receiving are apart from d neig, according to above formula (2), determine the neighbor information of its D2D UE separately.In actual applications, if meet following formula, can think that UEj is the neighbours of UEi.
P t d ij - α ≥ P t d neig - α - - - ( 3 )
Wherein, P tbe the transmitted power of UE, α is the path loss factor, uE i receives the received power of signal from UEj.That is to say, in actual applications, can be according to received power but not apart from judging between two UE whether be neighbours.
Each D2D UE has determined after neighbor information separately, in step S43, neighbor information has separately been fed back to eNB.
Owing to being not that each D2D UE knows its D2D companion (D2D peer), therefore,
Favourable, before or after above-mentioned steps S42, can also comprise step S42 ', each D2D UE judges whether it knows D2D companion separately; If not, in step S42a ', send query messages to eNB, for inquiring about the D2D companion of this D2D UE; ENB is according to the query messages receiving, in step S42b ', by this D2D UE of the D2D companion's of this D2D UE information notification.
ENB receives after the neighbor information separately from all D2D UE, in step S44, according to the neighbor information separately of these all D2D UE, determines the right neighbor information separately of all D2D in community.For example, eNB can determine the neighbours that D2D is right according to following principle: if arbitrary D2D UE of a D2D centering is the neighbours of a D2D UE of another D2D centering, so, these two D2D are to being neighbours.Fig. 5 shows an example that comprises the neighbor picture of 100 GeD2DDui communities, and wherein, each D2D is to being represented by star, and neighbours are interconnected by limit.
Due to the neighbor picture of community reflected to a certain extent D2D between interfere information, therefore, the neighbor picture of Ye Kejiang community is called the interference figure that multiple D2D are right.In order to hold the right time communication of these D2D, eNB is that neighbours distribute different resources.In order to obtain high resource efficiency, eNB also needs to know the summation that each D2D is right to be disturbed, link-quality and Signal to Interference plus Noise Ratio (SINR) thresholding γ th.But so right feedback will cause larger signaling consumption.Based on this, in technical scheme of the present invention, introduce a new parameter, be also interference-tolerant degree (tolerant interference degree, TID), for summit i (also, D2D to), its interference-tolerant degree is expressed as in order to make the SINR of each D2D link meet the SINR demand of communication, also, meet the restriction in above formula (1), need so to meet following formula:
P t d i - α I i + N 0 ≥ γ th - - - ( 4 )
Wherein the summation that is summit i is disturbed, d ithe distance of D2D link, ψ ithe neighborhood of summit i, N 0it is thermal noise.In order to meet inequality (4), obtain
I i ≤ P t d i - α γ th - N 0 - - - ( 5 )
Find out from above formula (5) is known, the summation that D2D is right is disturbed and for example should be less than, by the definite threshold value of its link-quality (, link-quality and decay factor).Therefore the summation that, D2D is right is disturbed and need to be controlled based on their link-quality separately.
According to previous research work (referring to Mordachev, V.and Loyka, S., On node density-outage probability tradeoff in wireless networks, IEEE Journal on Selected Areas in Communications, vo1.27,2009, result 1120-1131.), the main interference of a node, from the node nearest with it, can be ignored from the interference of other nodes.To be approximately thermal noise N from the interference on other non-neighbours summits herein, 0and hypothesis is I from the interference on nearest non-neighbours summit 0.So, TID is defined as follows, also represent the number on the summit that the patient and summit i of institute coexists:
In above formula (6), represent that a right reception D2D UE of D2D receives the received power of useful signal, I from its transmission D2D UE 0represent the received power of the signal that a right reception D2D UE of D2D receives from its nearest non-neighbours summit.
That is to say, in the technical scheme of invention, when D2D UE determines its neighbor information and obtains after its D2D companion information, further, in step S45, the reception D2D UE of D2D centering, according to above formula (6), calculates the value of its interference-tolerant degree then,, in step S46, receive D2D UE according to following formula, to the value of the interference-tolerant degree calculating quantize, to obtain the value of the interference-tolerant degree after quantification
Wherein, M is the right number of D2D in community, represent to round downwards.That is to say, when the value of the interference-tolerant degree calculating while being greater than M, the value using M as final interference-tolerant degree; When the value of the interference-tolerant degree calculating be less than at 1 o'clock, using 1 value as final interference-tolerant degree; When the value of the interference degree of bearing calculating be more than or equal to 1 and be less than or equal to M and be, to the value of the interference degree of bearing calculating round the value of the final interference-tolerant degree of rear conduct downwards.
Determine after the value of its interference-tolerant degree when receiving D2D UE, in step S47, the value of determined interference-tolerant degree has been sent to eNB, for example, can send to eNB by PUSCH or EPDCCH channel.ENB receives after the value of interference-tolerant degree of the reception D2D UE of D2D centering, in step S48, and the value using the value of the interference-tolerant degree of this reception D2D UE as the right interference-tolerant degree of the D2D corresponding under this reception D2D UE.
In another example, the reception D2D UE of D2D centering and transmission D2D UE determine respectively the value of its interference-tolerant degree separately, and the value of its interference-tolerant degree is separately offered to eNB.The value of eNB using smaller value in the value of these two interference-tolerant degree as the right interference-tolerant degree of this D2D.
After eNB has obtained the value of the interference-tolerant degree separately that in community, all D2D are right, in step S49, according to the value of the right neighbor information separately of all D2D and interference-tolerant degree, and based on greedy algorithm, by all D2D to be divided into several grouping in, and distribute different resources for each grouping, and be wherein divided into D2D in same grouping to being not neighbours mutually, go out as shown in Figure 6.Then, in step S410, will be, that each D2D is to the each D2D couple of resource notification distributing.ENB is that each D2D for example can send to each D2D couple by the mode of broadcast to the resource of distributing.Each D2D is to being received as via for example PDSCH or EPDCCH the information of the resource of its distribution.
In this greedy algorithm, all summits in community (also, D2D to) according to the value of their interference-tolerant degree separately by non-descending arrange, then, different groupings is put on these summits successively.After s circulation, all summits are divided into s grouping (G 1g s) in, wherein, each grouping is assigned with a resource, and also, in s grouping, each resource of distributing is different.In this algorithm, neighbours' summit will can not be placed in same grouping each other mutually, and a grouping is sequentially put into until the right interference summation of one of them D2D no longer can be tolerated in non-neighbours summit.That is to say the value of the interference-tolerant degree on each summit in each grouping meet following formula
The number on the summit in s grouping is expressed as to N (s), and its initial value is 0.Shown in greedy algorithm of the present invention is specific as follows:
Suppose S=1
Input: the set Ψ that all D2D are right 1={ v 1, v 2v m, neighbor picture { ψ i} i=1......M, and the set T of TID 1={ x 1, x 2x m}
Output: grouping G 1g s
Repeat
1) in the s time circulation, according to the TID on each summit in vertex set (also, the set that D2D is right), non-descending is carried out in each summit wherein N (k) represents grouping G kthe number on middle summit.Then obtain the vertex set after sequence
2) set up a grouping G s, and by first vertex v in vertex set s, 1putting into this grouping, is also G s=v s, 1.Meanwhile, by v s, 1from Ψ smiddle removal is also Ψ s=Ψ sv s, 1.Make N (s)=N (s)+1.
3) in order select and G sin member be not neighbours' summit, and put it into G sin.
Repeat
I. select and G sin member be not neighbours and the vertex v with maximum TID s, i, and put it into G sin, be also G s={ G s, v s, i.Meanwhile, by v s, ifrom Ψ smiddle removal is also Ψ s=Ψ sv s, i.
Ii. upgrade G sin member's TID value, be also and the number of upgrading summit in grouping s is also N (s)=N (s)+1.
Until G sin have at least the TID on a summit to be less than or equal to 0, be also ∀ j ∈ G s , T j≤0。
4)S＝s+1。
Until there is no summit residue, be also Ψ s=φ.
In technical scheme of the present invention, owing to having used TID feedback, therefore eNB is without position and the interference of knowing each UE.Therefore, signaling consumption and complexity have been reduced.
For the further technical scheme of assessment the above embodiment of the present invention, carry out relevant emulation and itself and degree of freedom scheme and randomizing scheme have been compared.Simulation parameter is as shown in table 1 below.
Table 1
Fig. 7 shows that the quantity of the resource that the quantity technical scheme of the present invention of the resource using than random scheme uses is greatly reduced (reducing approximately 94%).This is because in random scheme, and the right quantity of D2D of sharing same resource is tending towards equal, and resource in technical solution of the present invention is distributed by greedy algorithm, and it is similar to the scheme of the degree of freedom.
Fig. 8 shows the scheme than the degree of freedom, the throughput of the community of technical scheme of the present invention is improved (from 135% to 220%) greatly, and this is because considered summation interference and the link-quality that each D2D is right in technical scheme of the present invention.In addition, in technical scheme of the present invention, because interference has obtained good control, therefore the throughput of its throughput and random scheme is similar, and the resource that random scheme is used is more.
Fig. 9 shows that technical scheme of the present invention has good resource efficiency, and it is 4 times of scheme of the degree of freedom, is 17 times of random scheme.This is because technical scheme of the present invention has obtained great improvement and used less resource in throughput.
Above one embodiment of the present of invention are described in detail.In another embodiment of the present invention, still with reference to Fig. 1, if the UE of two vicinities have data to transmit and their direct channels enough good, eNB selects them as one group of D2D couple as.Define this cooperative relationship by distance herein.Suppose any one UEj, it will become an alternative partner of D2D of UEi, as long as the distance d between them ijbe less than predefined cooperation apart from d partner,
d ij≤d partner (9)
Because D2D link is often shorter and link-quality good, this transmits multiple D2D links simultaneously becomes possibility.On the other hand, due to radio broadcasting characteristic, D2D between interference may exist.Therefore, need control to disturb and ensure that Signal to Interference plus Noise Ratio requires to ensure effective D2D communication.In order to reach this object, the UE that has each other not tolerable to disturb will distribute different resources.In wireless environment, due to path loss, a communication link is only disturbed by the signal transmission of the UE of certain limit conventionally.In this scope, the channel between UE is better than a certain threshold value, and these UE are called to the source of interfering with each other.According to document " Mordachev; V.and Loyka; S.; On node density-outage probability tradeof in wireless networks; IEEEJournal on Selected Areas in Communications, vo1.27,2009; 1120-1131. ", the interference between UE reduces rapidly along with the increase of their distances.This means and can suppose the main interference of some UE in certain scope.Therefore, interference source will distribute different resources to carry out power ratio control in technical scheme of the present invention mutually.
Here suppose to two UE i and j arbitrarily, if the distance d between them ijbe less than predefined interference distance d interference, their interference sources each other,
d ij≤d interference (10)
D interferencefor being stored in a priori value at eNB place, this value is greater than d conventionally partnercarry out limit interferences.Figure 10 shows an example of the interference relationships of a UE, and wherein the interference source of UE is arranged in border circular areas.
Owing to once only having a UE transmission information a D2D centering, to a D2D concerning link, its suffered interference is from the right transmission UE of other D2D.Therefore, we to regarding an entirety as, represent each D2D with summit.If phase mutual interference between two UE, the D2D under them is to also thinking phase mutual interference so.Figure 11 shows an example of the interference relationships that D2D is right.
Suppose that D2D is to being assigned in different groups, mutually the D2D in is on the same group to using identical resource transmission.Define the uniformity that a module σ judges that resource is distributed.Represent the right number of D2D in a group with stochastic variable M, σ can be expressed as follows
σ = var ( M ) = Σ i = 1 N ( M i - μ ) 2 - - - ( 11 )
Wherein μ represents the average of M, M ithe number that represents member in i grouping, N represents the number of grouping.The value of σ is less, illustrates that Resource Allocation Formula Resources allocation is more even.Hereinafter will elaborate step by step this scheme.
As shown in figure 12, first, in step S1201, eNB broadcast D2D cooperation is apart from d partnerwith interference distance d interference.In real process, eNB can be by setting d partnerand d interferencevalue manage and receive reception signal and the interference of UE.Their value can record the deployed position of UE or other information such as through-put power, the distance etc. of UE feedback obtain by empirical value or TA (Timing Advance).
UE is receiving cooperation from eNB apart from d partnerwith interference distance d interferenceafter, the bag that UE comprises own identity information with transmitting in the channel of random channel or distribution in a time slot; In another time, it monitors the information from other UE.Then UE solves the bag that receives estimation give out a contract for a project UE and distance itself, and then, in step S1202, UE obtains two above-mentioned set by formula (9) and (10).In reality, UE also can judge by received power.Meet following formula (12) if UEj transmits in the received power of UE i, UEj is considered to the alternative partner of UE i.
P t d ij - α ≥ P t d partner - α - - - ( 12 )
Wherein P tfor the through-put power of UE, α is the path loss factor, for UE i receives the signal power of UEj.Similar, the interference source of UE i can be determined by following formula
P t d ij - α ≥ P t d interference - α - - - ( 13 )
After these relatively finish, UE just can obtain its cooperation set Φ pand interference source set Φ i.Generally speaking, cooperation set subordinate and interference source set, this is because d partner≤ d interference.
Then,, in step S1203, the cooperation set of oneself and interference source set are fed back to eNB by each UE.Due to Φ pand Φ ipartly overlap, UE only need to be by Φ pwith the UE Φ in interference source set just i/ Φ pfeedback.Utilize cooperation set Φ p, eNB can determine that UE transmits with traditional mode transmission information or with D2D.This set can help eNB to determine the transmission mode of UE the searching scope of dwindling D2D partner.Therefore, will reduce signaling consumption.A given UE, if another UE is its object reception object the cooperation set that is subordinated to it, these two UE will form a D2D to also direct transmission information so.Disturb set Φ by utilization i, eNB can obtain the interference figure of all UE.In step S1204, according to these feedback informations of UE, eNB can build the interference figure that all D2D are right.Figure 13 shows the example of an interference figure that comprises 100 GeD2DDui communities.Wherein, asterisk represents summit, between interference source, is connected by limit.
Then,, in step S1205, eNB gives these D2D to carrying out Resources allocation according to Greedy Coloring algorithm.Each D2D is to being regarded as a summit, and the non-arrangement that increases progressively is carried out according to their degree of freedom in these summits.According to saturation, they are assigned in different groups.To some D2D couple, saturation is defined as the number of vertices that has been assigned with resource in its neighbours.After s circulation, summit is assigned to N group (G 1g n) in, the D2D of each group is to using a resource.In this process, the D2D of phase mutual interference is to by utilizing Φ 1be assigned in different groups.The grouping that has minimum member has holds the priority that new D2D is right at first.This greedy algorithm proposing is specific as follows:
1. eNB is according to Φ iand Φ pset up interference figure, each D2D is to being represented by a summit;
2. calculate the degree of freedom on each summit, and according to the summit degree of freedom, they are increased progressively to arrangement by non-
3. give first vertex coloring by random color, and calculate the saturation on other summit
4. choose the summit with maximum saturation, if run into the situation that saturation is identical, select arbitrarily one of them.
5. give the current available color set Φ for summit selecting amiddle by the colors staining of the least number of times of use.Φ acomprise all colours set that non-this summit interference source has been colored.If Φ afor sky, create a new color.Upgrade the saturation of this summit interference source.
6. turn back to step 4. until all summits be colored.
After said process finishes, the color that each summit is assigned with, as shown in figure 14.There is the D2D of same color to sharing identical resource.The number of color is the number of Resources allocation.By this greedy algorithm, the number that is assigned with resource is minimized.Meanwhile, use the number that the D2D of each resource is right similar.
Finally, in step S1206, eNB will be that each D2D is to the each D2D couple of resource notification distributing.Then the resource transmission data that, each D2D is assigned with basis.
For the further technical scheme of assessment the above embodiment of the present invention, carry out relevant emulation and itself and degree of freedom scheme and randomizing scheme have been compared.Simulation parameter is as shown in table 2 below.
Table 2
Figure 15 has compared the uniformity of three kinds of schemes.As can be seen from the figure,, as benchmark, random scheme has best uniformity and the scheme of the degree of freedom has the poorest uniformity.In addition, the relatively technical scheme of the degree of freedom, technical scheme of the present invention has reduced by 50% by σ value.This that is to say, from the angle of uniform distribution resource, technical scheme of the present invention will be due to the technical scheme of the degree of freedom.
Figure 16 shows that the scheme of the degree of freedom has the probability Signal to Interference plus Noise Ratio of half very low, the not requirement of realistic communication.Reason be in this scheme the overwhelming majority D2D to being assigned in first group, most D2D are to sharing identical resource.For the value that makes Signal to Interference plus Noise Ratio meets actual needs, interference distance needs further extended, and this causes again resource consumption to uprise.In technical scheme of the present invention, Signal to Interference plus Noise Ratio is the highest to be improved twice this is because of the more uniform Resources allocation of scheme for this reason and disturbs set to control interference.
Figure 17 shows dry similar than to randomizing scheme of the letter of technical scheme of the present invention.This is because of the increase along with interference distance, and in technical scheme of the present invention, interference source is more easily assigned in different resources mutually.And in randomizing scheme, be the interference that uniform Resources allocation is not considered D2D centering.And technical scheme of the present invention is by 6 times of the highest liftings of the dry ratio of the letter of degree of freedom scheme.That is to say, the advantage of suggesting plans becomes large Φ at interference distance 1more remarkable when smaller, this be because of for the benefit of being brought by uniform distribution resource more obvious.
Figure 18 shows that the number of resources of technical scheme of the present invention and the use of degree of freedom scheme is similar but Signal to Interference plus Noise Ratio will be much better than the latter.In addition, to have best Signal to Interference plus Noise Ratio be taking huge resource consumption as cost to randomizing scheme.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned example embodiment, and in the situation that not deviating from spirit of the present invention or essential characteristic, can realize the present invention with other concrete form.Therefore, no matter from which point, all should regard embodiment as exemplary, and be nonrestrictive, any Reference numeral in claim should be considered as limiting related claim.In addition, significantly, " comprising ", other elements or step do not got rid of in a word, and " one " word before element is not got rid of and comprised " multiple " this element.Multiple elements of stating in claim to a product also can be realized by software or hardware by an element.The first, the second word such as grade is used for representing title, and does not represent any specific order.

Claims (20)

  1. In the base station of communication system for a method for Resources allocation, wherein, in the coverage of described base station, comprise multiple D2D couple, each D2D, to comprising two D2D subscriber equipmenies, said method comprising the steps of:
    I. send predetermined neighbours' distance to all D2D subscriber equipmenies in this base station range;
    Ii. receive the neighbor information separately from described all D2D subscriber equipmenies;
    Iii. according to the neighbor information separately of described all D2D subscriber equipmenies, determine the neighbor information separately that described multiple D2D is right;
    Iv. obtain the value of the interference-tolerant degree separately that described multiple D2D is right;
    V. according to the value of the right neighbor information separately of described multiple D2D and interference-tolerant degree, and based on greedy algorithm, described multiple D2D, to being divided in several groupings, and are distributed to different resources for each grouping, be wherein divided into D2D in same grouping to not being neighbours mutually.
    Vi. by be described multiple D2D centerings each D2D to distribute resource notification described in each D2D couple.
  2. 2. method according to claim 1, is characterized in that, after described step I, further comprising the steps of before described step I v:
    -reception is from the D2D companion's about these one or more D2D subscriber equipmenies of the one or more D2D subscriber equipmenies in described all D2D subscriber equipmenies query messages;
    -notify this one or more D2D subscriber equipmenies by the D2D companion's of described one or more D2D subscriber equipmenies information.
  3. 3. method according to claim 1, is characterized in that, described step I v comprises the following steps:
    -obtain the value of the interference-tolerant degree of this reception D2D subscriber equipment from the right reception D2D subscriber equipment of each D2D of described multiple D2D centerings;
    -value using the value of the interference-tolerant degree of described reception D2D subscriber equipment as the right interference-tolerant degree of the D2D corresponding under this reception D2D subscriber equipment;
    Wherein, the value of the interference-tolerant degree of described reception D2D subscriber equipment obtains in the following manner:
    -calculate the value of the interference-tolerant degree of described reception D2D subscriber equipment by following formula
    Wherein, represent that described reception D2D subscriber equipment receives the received power of useful signal, I from its transmission D2D subscriber equipment 0represent described reception D2D subscriber equipment from its nearest non-neighbours D2D to receiving the received power of signal, N 0represent thermal noise, γ threpresent SINR threshold value, α represents the path loss factor;
    -quantize the value of calculated interference-tolerant degree by following formula to obtain the value of the interference-tolerant degree after quantizing
    Wherein, M is the number that the D2D in described base station range is right, represent to round downwards.
  4. 4. method according to claim 1, is characterized in that, described step I v comprises the following steps:
    -obtain the value of the interference-tolerant degree of this reception D2D subscriber equipment from the right reception D2D subscriber equipment of each D2D of described multiple D2D centerings, and obtain the value of the interference-tolerant degree of this transmission D2D subscriber equipment from sending D2D subscriber equipment;
    -using the smaller value in the value of the value of interference-tolerant degree of described reception D2D subscriber equipment and the interference-tolerant degree of described transmission D2D subscriber equipment as this reception D2D subscriber equipment with send the value of the interference-tolerant degree that D2D under D2D subscriber equipment is right;
    Wherein, the value of the interference-tolerant degree of described reception D2D subscriber equipment obtains in the following manner:
    -calculate the value of the interference-tolerant degree of described reception D2D subscriber equipment by following formula
    Wherein, represent that described reception D2D subscriber equipment receives the received power of useful signal, I from its transmission D2D subscriber equipment 0represent described reception D2D subscriber equipment from its nearest non-neighbours D2D to receiving the received power of signal, N 0represent thermal noise, γ threpresent SINR threshold value, α represents the path loss factor;
    -quantize the value of calculated interference-tolerant degree by following formula to obtain the value of the interference-tolerant degree after quantizing
    Wherein, M is the number that the D2D in described base station range is right, represent to round downwards; And
    Wherein, the value of the interference-tolerant degree of described transmission D2D subscriber equipment obtains in the following manner:
    -calculate the value of the interference-tolerant degree of described transmission D2D subscriber equipment by following formula
    Wherein, represent that described transmission D2D subscriber equipment receives the received power of useful signal, I from its reception D2D subscriber equipment 0represent described transmission D2D subscriber equipment from its nearest non-neighbours D2D to receiving the received power of signal, N 0represent thermal noise, γ threpresent SINR threshold value;
    -quantize the value of calculated interference-tolerant degree by following formula to obtain the value of the interference-tolerant degree after quantizing
    Wherein, M is the number that the D2D in described base station range is right, represent to round downwards.
  5. 5. method according to claim 1, is characterized in that, described step v comprises the following steps:
    V1. with the value of the right interference-tolerant degree of each D2D of described multiple D2D centerings, the plurality of D2D couple of non-descending, to generate D2D pair set after sorted;
    V2. set up a grouping, and by first D2D in D2D pair set after sorted to putting into this grouping, and by this first D2D to removing from D2D pair set after sorted, to upgrade this D2D pair set;
    V3. in order from upgrade D2D pair set in select one with this grouping in arbitrary member be not all neighbours' D2D couple, and by selected D2D to putting into this grouping, and from D2D pair set, remove selected D2D to upgrade this D2D pair set, and the value of the interference-tolerant degree of the each member in this grouping is subtracted to 1;
    V4. repeat above-mentioned steps v3 until the value of the interference-tolerant degree of at least one member in this grouping is less than or equal to zero;
    V5. with the value of the interference-tolerant degree that in the D2D pair set after upgrading, remaining D2D is right, this remaining D2D couple of non-descending, to generate D2D pair set after sorted;
    V6. repeat above-mentioned steps v2 to v5 until D2D pair set is sky;
    V7. for the each grouping in set up multiple groupings distributes different resources.
  6. In the base station of communication system for a method for Resources allocation, wherein, in the coverage of described base station, comprise multiple D2D couple, each D2D, to comprising two D2D subscriber equipmenies, said method comprising the steps of:
    A. send predetermined cooperation distance and predetermined interference distance to all D2D subscriber equipmenies in this base station range;
    B. receive cooperation set separately and interference source set from described all D2D subscriber equipmenies;
    C. according to the cooperation set separately of described all D2D subscriber equipmenies and interference source set, build the right interference figure of described multiple D2D;
    D. based on described multiple D2D right interference figure and greedy algorithm, and according to the right saturation of described multiple D2D, by described multiple D2D to be divided into several grouping in, and distribute different resources for each grouping, wherein, for certain D2D couple, its saturation represents to be assigned with in its neighbours the right number of D2D of resource;
    E. by be described multiple D2D centerings each D2D to distribute resource notification described in each D2D couple.
  7. 7. method according to claim 6, is characterized in that, described steps d comprises the following steps:
    D1. calculate the degree of freedom separately that described multiple D2D is right, and the degree of freedom separately right according to described multiple D2D, by described multiple D2D to increasing progressively arrangement according to non-, to generate D2D pair set after sorted;
    D2. give first D2D in described D2D pair set after sorted to dyeing by random color, and the right saturation of all the other D2D in D2D pair set after sorted described in calculating;
    D3. choose the D2D couple with maximum saturation from described all the other D2D centerings;
    D4. with being given the D2D selecting to dyeing by the color of the least number of times of use in current available color set, wherein, described current available color set has comprised all colours set that non-this D2D has been colored to interference source; If current available color set is empty, create a new color;
    D5. upgrade the saturation of this D2D to interference source;
    D6. turn back to above-mentioned steps d3 until all D2D to being colored.
  8. In the reception D2D of communication network subscriber equipment for a method for assistant base station Resources allocation, wherein, said method comprising the steps of:
    I. receive the predetermined neighbours' distance from described base station;
    II. the predetermined neighbours' distance based on received, determines the neighbor information of this reception D2D subscriber equipment;
    III. determined neighbor information that receives D2D subscriber equipment is sent to described base station;
    IV. determine the value of the interference-tolerant degree of this reception D2D subscriber equipment, and determined value that receives the interference-tolerant degree of D2D subscriber equipment is sent to described base station;
    V. receive the resource allocation information from base station.
  9. 9. method according to claim 8, is characterized in that, after described step I, further comprising the steps of before described step IV:
    -judge whether this reception D2D subscriber equipment knows its D2D companion;
    -if not, send query messages to described base station, for inquiring about the D2D companion of this reception D2D subscriber equipment;
    -reception is from the D2D companion's of this reception D2D subscriber equipment of described base station information.
  10. 10. method according to claim 8, is characterized in that, described step IV comprises the following steps:
    -calculate the value of the interference-tolerant degree of this reception D2D subscriber equipment by following formula
    Wherein, represent that this reception D2D subscriber equipment receives the received power of useful signal, I from its transmission D2D subscriber equipment 0represent this reception D2D subscriber equipment from its nearest non-neighbours D2D to receiving the received power of signal, N 0represent thermal noise, γ threpresent SINR threshold value, α represents the path loss factor;
    -quantize the value of calculated interference-tolerant degree by following formula to obtain the value of the interference-tolerant degree after quantizing
    Wherein, M is the number that the D2D in described base station range is right, represent to round downwards.
  11. 11. 1 kinds in the transmission D2D of communication network subscriber equipment for the method for assistant base station Resources allocation, wherein, said method comprising the steps of:
    A. receive the predetermined neighbours' distance from described base station;
    B. the predetermined neighbours' distance based on received, determines the neighbor information of this transmission D2D subscriber equipment;
    C. determined neighbor information that sends D2D subscriber equipment is sent to described base station;
    E. receive the resource allocation information from base station.
  12. 12. methods according to claim 11, is characterized in that, after described steps A, further comprising the steps of before described step e:
    -judge whether this transmission D2D subscriber equipment knows its D2D companion;
    -if not, send query messages to described base station, for inquiring about the D2D companion of this transmission D2D subscriber equipment;
    -reception is from the D2D companion's of this transmission D2D subscriber equipment of described base station information.
  13. 13. methods according to claim 11, is characterized in that, after described step C, further comprising the steps of before described step e:
    D. determine the value of the interference-tolerant degree of this transmission D2D subscriber equipment, and the value of the interference-tolerant degree of this transmission D2D subscriber equipment is sent to described base station.
  14. 14. methods according to claim 13, is characterized in that, described step D comprises the following steps:
    -calculate the value of the interference-tolerant degree of this transmission D2D subscriber equipment by following formula
    Wherein, represent that this transmission D2D subscriber equipment receives the received power of useful signal, I from its reception D2D subscriber equipment 0represent this transmission D2D subscriber equipment from its nearest non-neighbours D2D to receiving the received power of signal, N 0represent thermal noise, γ threpresent SINR threshold value;
    -quantize the value of calculated interference-tolerant degree by following formula to obtain the value of the interference-tolerant degree after quantizing
    Wherein, M is the number that the D2D in described base station range is right, represent to round downwards.
  15. 15. 1 kinds in the D2D of communication network subscriber equipment for the method for assistant base station Resources allocation, wherein, said method comprising the steps of:
    -reception is from predetermined cooperation distance and the predetermined interference distance of described base station;
    -predetermined cooperation distance and predetermined interference distance based on received, determines cooperation set and the interference source set of this D2D subscriber equipment;
    -cooperation set of determined D2D subscriber equipment and interference source set are sent to described base station;
    -reception is from the resource allocation information of base station.
  16. 16. 1 kinds in the base station of communication system for the device of Resources allocation, wherein, in the coverage of described base station, comprise multiple D2D couple, each D2D is to comprising two D2D subscriber equipmenies, described device comprises:
    The first transmitting element, sends predetermined neighbours' distance for all D2D subscriber equipmenies in this base station range;
    The first receiving element, for receiving the neighbor information separately from described all D2D subscriber equipmenies;
    The first determining unit, for according to the neighbor information separately of described all D2D subscriber equipmenies, determines the neighbor information separately that described multiple D2D is right;
    Acquiring unit, for obtaining the value of the interference-tolerant degree separately that described multiple D2D is right;
    Resource allocation unit, be used for according to the value of the right neighbor information separately of described multiple D2D and interference-tolerant degree, and based on greedy algorithm, by described multiple D2D to be divided into several grouping in, and distribute different resources for each grouping, be wherein divided into D2D in same grouping to not being neighbours mutually.
    The second transmitting element, for by be described multiple D2D centerings each D2D to distribute resource notification described in each D2D couple.
  17. 17. 1 kinds in the reception D2D of communication network subscriber equipment for the device of assistant base station Resources allocation, wherein, described device comprises:
    The second receiving element, for receiving the predetermined neighbours' distance from described base station;
    The second determining unit, for the predetermined neighbours' distance based on received, determines the neighbor information of this reception D2D subscriber equipment;
    The 3rd transmitting element, is sent to described base station for the neighbor information that receives D2D subscriber equipment by determined;
    The 3rd determining unit, for determining the value of interference-tolerant degree of this receptions D2D subscriber equipment, and is sent to described base station by the value of the interference-tolerant degree of determined reception D2D subscriber equipment;
    The 3rd receiving element, for receiving the resource allocation information from base station.
  18. 18. 1 kinds in the transmission D2D of communication network subscriber equipment for the device of assistant base station Resources allocation, wherein, described device comprises:
    The 4th receiving element, for receiving the predetermined neighbours' distance from described base station;
    The 4th determining unit, for the predetermined neighbours' distance based on received, determines the neighbor information of this transmission D2D subscriber equipment;
    The 4th transmitting element, is sent to described base station for the neighbor information that sends D2D subscriber equipment by determined;
    The 5th receiving element, for receiving the resource allocation information from base station.
  19. 19. 1 kinds in the base station of communication system for the device of Resources allocation, wherein, in the coverage of described base station, comprise multiple D2D couple, each D2D is to comprising two D2D subscriber equipmenies, described device comprises:
    The 5th transmitting element, sends predetermined cooperation distance and predetermined interference distance for all D2D subscriber equipmenies in this base station range;
    The 6th receiving element, for receiving cooperation set separately and the interference source set from described all D2D subscriber equipmenies;
    Construction unit, for according to the cooperation set separately of described all D2D subscriber equipmenies and interference source set, builds the right interference figure of described multiple D2D;
    Allocation units, be used for based on described multiple D2D right interference figure and greedy algorithm, and according to the right saturation of described multiple D2D, by described multiple D2D to be divided into several grouping in, and distribute different resources for each grouping, wherein, for certain D2D couple, its saturation represents to be assigned with in its neighbours the right number of D2D of resource;
    The 6th transmitting element, for by be described multiple D2D centerings each D2D to distribute resource notification described in each D2D couple.
  20. 20. 1 kinds in the D2D of communication network subscriber equipment for the device of assistant base station Resources allocation, wherein, described device comprises:
    The 7th receiving element, for receiving predetermined cooperation distance and the predetermined interference distance from described base station;
    The 5th determining unit, for predetermined cooperation distance and predetermined interference distance based on received, determines cooperation set and the interference source set of this D2D subscriber equipment;
    The 7th transmitting element, for being sent to described base station by the cooperation set of determined D2D subscriber equipment and interference source set;
    The 8th receiving element, for receiving the resource allocation information from base station.
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