CN104254130A - Method, device and system for allocating D2D (Device-to-Device) user link and cellular user shared resources - Google Patents

Abstract

The invention provides a method, a device and a system for allocating D2D (Device-to-Device) user link and cellular user shared resources. The method comprises the following steps: 1 searching all feasible sharing combination pairs between cellular users who satisfy preset conditions and can share resources and D2D user links; 2 establishing corresponding relations between the D2D user links and the cellular users of the feasible sharing combination pairs and between the D2D user links and cellular user resources; 3 according to the corresponding relations, conducting cellular user resource sharing between the D2D user links which are at inferior positions and the cellular users with resources capable of being shared by the least number of D2D user links, wherein the D2D user links which are at inferior positions are the least number of D2D user links which can share the resources of the cellular users. The method, the device and the system for allocating D2D user link and cellular user shared resources have the advantages that users as many as possible are enabled to complete matching to some extent, the satisfaction of the D2D users and the cellular users is guaranteed, the computation complexity is greatly reduced under the situation of fewer performance losses, and the system resources are saved.

Description

Distribution method, the Apparatus and system of D2D user's link and phone user's shared resource

Technical field

The present invention relates to mobile communication technology field, particularly relate to distribution method, the Apparatus and system of a kind of D2D user link and phone user's shared resource.

Background technology

Along with the development of mobile communication technology, China's mobile communication system progressively strides forward the 3G epoch and develops to 4G further, LTE (Long Term Evolution) system has become the focus of modern communication technology to the transition of 4G as 3G, but, in recent years along with the fast development of mobile communication, the continuous increase of system bandwidth demand, the distribution of bandwidth becomes more and more crowded, and the frequency spectrum resource that can be used for mobile communication is at present very limited again, so utilize the existing frequency spectrum resource of system to increase throughput of system to greatest extent become a kind of inexorable trend.In order to address this problem, D2D (Device-to-Device) communication technology is arisen at the historic moment.

According to the difference of the frequency spectrum resource that D2D communication uses, D2D communication can be divided into two classes: use the D2D of cellular system resources to communicate and use the D2D of unlicensed band to communicate.Wherein, the D2D communication of cellular system resources and D2D user and phone user is used to share cell resource.Model of document resource sharing between phone user and D2D user can be divided into two kinds according to existing research: orthogonal modes and non-orthogonal mode.Orthogonal modes refers to that two kinds of users use different running time-frequency resource (that refer in LTE network is exactly Physical Resource Block PRB (Physical Resource Block)), that is, when using this pattern, between two kinds of users, mutual interference can not be there is; Non-orthogonal mode refers to that two kinds of users use same frequency spectrum or time interval resource (Physical Resource Block), like this, will produce mutual interference between two kinds of users, make the interference environment of LTE more complicated.Wherein use the D2D of non-orthogonal mode to communicate and can improve the availability of frequency spectrum of cellular frequency spectrum further; And all cellular devices can use this communication pattern, and due to cellular frequency spectrum be subject to base station completely to control, the service quality QoS (Quality of Service) of user requires be met than being easier to.

In cellular networks under non orthogonal resources shared model, D2D user and phone user use same Resource Block.Two users being undertaken communicating by D2D are called D2D user's link.When carrying out resource-sharing, because resource block size is different, following several resource-sharing is had to share possibility: a D2D user links the Resource Block of a shared phone user; A D2D user links the Resource Block of shared multiple phone user; Multiple D2D user links the Resource Block of shared same phone user.But in this D2D communication pattern, the interference controlled because common spectrum resource is brought is a difficult problem; Power control and interference management often need the method for managing resource by means of high complexity, thus bring extra expense.Therefore, the Resourse Distribute between D2D user and phone user is most important.For addressing this problem, in prior art, what have takes random access scheme, the selection only paying close attention to one party in D2D user and phone user had, what have is then realized by exhaustive search, such as, adopts traditional KM (Kuhn-Munkras) algorithm.Wherein KM algorithm is the one of Hungary Algorithm, be used to solve maximum weight matching problem, it by each vertex label (being called top mark) the problem asking the problem of maximum weight matching to be converted into ask maximum coupling, this algorithm is changed top mark complete maximum weight matching by not being stopped iteration.

Realizing in process of the present invention, inventor finds that in prior art, at least there are the following problems: although existing user resources matching process can completing user resource allocation problem to a certain extent, if but mate at random, coupling satisfaction and accessible systematic function all lower; If only consider the selection of D2D user and phone user wherein one party, then lack fairness, user both sides' satisfaction is lower; Although traditional KM algorithm can make systematic function optimization, corresponding complexity is also large, and particularly when the factors such as power optimization also take in, user is mated will be increased the computing time spent greatly.But the base unit of physical layer scheduling is 1ms in LTE, the computing time in a few second all will cause very large dispatch delay.

Summary of the invention

The coupling of phone user's resource is completed in order to D2D user as much as possible can be made to a certain extent, ensure the satisfaction of D2D user and phone user simultaneously, and significantly reduce computation complexity when less performance loss, save system resource, the invention provides the distribution method of a kind of D2D user link and phone user's shared resource, described method comprises:

S1. all feasible shared combination between phone user and D2D user's link meeting the pre-conditioned resource-sharing carried out is searched right;

S2. the corresponding relation between phone user and phone user's resource that D2D user links and feasible shared combination is right is set up;

S3. according to described corresponding relation by the D2D user be in a disadvantageous position link with can be linked the minimum phone user of number by the D2D user of resource-sharing and carry out phone user's resource-sharing, described in the D2D user that is in a disadvantageous position be linked as and can share the minimum D2D user of phone user's resource number and link.

Preferably, describedly pre-conditionedly to comprise: one or more in QoS of customer requirement, safe class requirement, minimum safe capacity, most high bit-error and user's maximum transmission power restriction thresholding.

Preferably, when have in cellular network simultaneously multiple can be linked the minimum phone user of number by the D2D user of resource-sharing time, described step S3 comprises:

In above-mentioned multiple phone user and current all D2D user's links, respectively combination is linked to each phone user and D2D user and carry out joint Power optimization, obtain the maximum target system remuneration that each group is corresponding;

Select to make the maximum phone user of goal systems remuneration and D2D user link combination and carry out phone user's resource-sharing.

Preferably, described method also comprises:

If current cellular users does not have to carry out D2D user's link of resource-sharing, then for current cellular users reservation self phone user's resource.

Preferably, described method also comprises:

If current D2D user's link does not have the phone user that can carry out resource-sharing, then distribute other band resource for current D2D user links.

The present invention also puts forward the distributor of a kind of D2D user link and phone user's shared resource, and described device comprises:

Search module, right for searching all feasible shared combination between phone user and D2D user's link meeting the pre-conditioned resource-sharing carried out;

Relation sets up module, for setting up the corresponding relation between phone user and phone user's resource that D2D user links and feasible shared combination is right;

First resource distribution module, for according to described corresponding relation by the D2D user be in a disadvantageous position link with can be linked the minimum phone user of number by the D2D user of resource-sharing and carry out phone user's resource-sharing, described in the D2D user that is in a disadvantageous position be linked as and can share the minimum D2D user of phone user's resource number and link.

Preferably, when have in cellular network simultaneously multiple can be linked the minimum phone user of number by the D2D user of resource-sharing time, described first resource distribution module comprises:

Joint Power optimizes unit, in above-mentioned multiple phone user and current all D2D user's links, links combination respectively and carries out joint Power optimization, obtain the maximum target system remuneration that each group is corresponding to each phone user and D2D user;

Resource allocation unit, carries out phone user's resource-sharing for selecting to make the maximum phone user of goal systems remuneration and D2D user link combination.

Preferably, described device also comprises:

Secondary resource distribution module, for there is no to carry out D2D user's link of resource-sharing at current cellular users, for current cellular users retain self phone user's resource.

Preferably, described device also comprises:

Information resources distribution module, for not having the phone user that can carry out resource-sharing when current D2D user's link, distributes other band resource for current D2D user links.

Present invention also offers the distribution system of a kind of D2D user link and phone user's shared resource, this system comprises the distributor of above-mentioned arbitrary D2D user's link and phone user's shared resource.

The D2D user's link adopting the present invention to propose and distribution method, the Apparatus and system of phone user's shared resource, mandatory requirement D2D user does not share phone user's resource, on the basis ensureing elemental user service quality, carry out the coupling of D2D user and phone user's resource, user as much as possible is made to complete coupling to a certain extent, both ensure that the satisfaction of D2D user and phone user, and considerably reduce computation complexity when less performance loss, save system resource.

Accompanying drawing explanation

Can understanding the features and advantages of the present invention clearly by reference to accompanying drawing, accompanying drawing is schematic and should not be construed as and carry out any restriction to the present invention, in the accompanying drawings:

Fig. 1 is the flow chart of the distribution method of a kind of D2D user's link of the present invention and phone user's shared resource;

Fig. 2 is the application scenarios schematic diagram of the embodiment of the present invention one;

Fig. 3 is the schematic diagram of the bipartite graph proposed in the embodiment of the present invention one;

Fig. 4 is that in the embodiment of the present invention, D2D user links number M when fixing, and phone user number N affects result schematic diagram to total data rate;

Fig. 5 is when in the embodiment of the present invention, phone user number N fixes, and D2D user links number M and affects result schematic diagram to total data rate;

Fig. 6 is the contrast schematic diagram of algorithms of different computing time in the embodiment of the present invention;

Fig. 7 is the module map of the distributor of a kind of D2D user's link of the present invention and phone user's shared resource.

Embodiment

For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.

Fig. 1 is that a kind of D2D user that the embodiment of the present invention one proposes links the distribution method flow chart with phone user's shared resource, and as shown in Figure 1, the method comprises the following steps:

S1. all feasible shared combination between phone user and D2D user's link meeting the pre-conditioned resource-sharing carried out is searched right.

In the embodiment of the present invention, pre-conditionedly to comprise: one or more in QoS of customer requirement, safe class requirement, minimum safe capacity, most high bit-error and user's maximum transmission power restriction thresholding.

S2. the corresponding relation between phone user and phone user's resource that D2D user links and feasible shared combination is right is set up.Wherein, the corresponding relation proposed in the embodiment of the present invention comprises multiple, as phone user's resource and D2D user's link are mated one to one; Single phone user's Resource Block gives multiple D2D user link, and even D2D user's link bunch uses; The resource units that multiple phone user's Resource Block composition is larger links or D2D user bunch for single D2D user.

S3. according to described corresponding relation by the D2D user be in a disadvantageous position link with can be linked the minimum phone user of number by the D2D user of resource-sharing and carry out phone user's resource-sharing, described in the D2D user that is in a disadvantageous position be linked as and can share the minimum D2D user of phone user's resource number and link.

The present invention adopts two-way backward selection algorithm, first to any phone user's resource, first determine to meet qos requirement and the D2D user that can carry out resource-sharing set, from the D2D user be in a disadvantageous position links, select to have the minimum phone user of the D2D user's number of links that can mate be matched to right, carry out resource-sharing, and carry out power optimization and obtain the remuneration of corresponding maximum target system.Described goal systems remuneration is relevant to SNR signal to noise ratio, can arrange according to system requirements, can be data rate sum or the safe rate sum of a pair phone user and D2D link, the safe rate sum that data rate and the D2D of phone user link, or the data rate sum etc. that the safe rate of phone user links with D2D, also can be data rate sum or the safe rate sum of phone user and the D2D link of all having matched, the safe rate sum that data rate and the D2D of the phone user in whole pairing link, or the data rate sum etc. that the safe rate of phone user links with D2D.The present invention is described in detail as goal systems remuneration for the data rate sum preferably adopting the phone user all matched and D2D to link in the present invention.Afterwards, more successively a upper process is repeated to except other users matched except user.Due in embodiments of the present invention, the user not meeting basic qos requirement does not participate in resource-sharing coupling, therefore can ensure overall coupling satisfaction to a certain extent, and not need to carry out a large amount of iteration, thus significantly reduce complexity.

In embodiments of the present invention, when have in cellular network simultaneously multiple can be linked the minimum phone user of number by the D2D user of resource-sharing time, described step S3 comprises:

In above-mentioned multiple phone user and current all D2D user's links, respectively combination is linked to each phone user and D2D user and carry out joint Power optimization, obtain the maximum target system remuneration that each group is corresponding, select to make the maximum phone user of goal systems remuneration and D2D user link combination and carry out phone user's resource-sharing.

In embodiments of the present invention, meet pre-conditioned under, resource sharing can be carried out between not all phone user and D2D user, therefore, may have that phone user is used alone frequency spectrum resource, D2D user links and use orthogonal frequency range but not occur with the situation such as phone user's shared resource, wherein, if current cellular users does not have to carry out D2D user's link of resource-sharing, then for current cellular users reservation self phone user's resource.If current D2D user's link does not have the phone user that can carry out resource-sharing, then distribute other band resource, as orthogonal frequency band for current D2D user links.

Below with scene as shown in Figure 2, by specific embodiment, the present invention is described in detail.

In this honeycomb, suppose have M D2D user's link and N number of phone user, use the uplink resource of network.Therefore, with C={1,2 ..., N} and D={1,2 ..., M} represents the set of D2D user's link and phone user respectively.Node simultaneously in our set scene is static or low-speed motion, thus can obtain channel condition information (CSI).Meanwhile, extensive path loss channel model is all adopted to D2D user's link and phone user.

Suppose: each active user only uses the Resource Block of a unit; Each D2D user is linked at the Resource Block that the most multipotency of synchronization uses a unit; Base station controls the following information of telex network:

--noise power

--the uplink channel gain g between phone user i to base station _i,Band D2D user links the channel gain g between j _j;

--the channel gain h of the interference link between the transmitting terminal that D2D user links to base station _j,B;

--the transmitted power of phone user i the transmitted power of j is linked with D2D user

--the channel gain h between phone user i to D2D user link _i,j;

Bipartite graph is adopted to represent the relation between phone user and Resource Block and the relation between D2D user's link and Resource Block in the embodiment of the present invention, as shown in Figure 3, and in bipartite graph, add some dummy nodes, coupling not between mandatory requirement user resources, namely mandatory requirement D2D user and phone user do not share same resource;

First, j is linked for phone user i and D2D user, define the indicator variable q of a coupling _i,j, and q _i,j∈ { 0,1}.When the frequency spectrum resource of a jth D2D user to multiplexing i-th phone user time, q _i,j=1, other time q _i,j=0. owing to linking the resource that can only use at most a phone user synchronization D2D user, and the resource of a phone user links shared also can only at most a D2D user, therefore,

Use f _iand h _jrepresent that phone user i and D2D user link the target function of j respectively, phone user and D2D, with having respective qos requirement per family, show as therefore, our target is exactly under the prerequisite meeting qos requirement and power limitation condition, target function is maximized, that is:

$\begin{array}{cc}\underset{\{q_{i,j},P_i^c,P_j^d\}}{\max }& \underset{i}{\mathrm{\Σ}}(f_i+\underset{j}{\mathrm{\Σ}}{q}_{i,j}{h}_j)---\left(1a\right)\end{array}$

$f_i^c\≥f_{i,\min }^c,h_j^d\≥h_{j,\min }^d---\left(1b\right)$

$P_i^c\≤P_{i,\max }^c,P_j^d\≤P_{j,\max }^d---\left(1c\right)$

Wherein, f _ifor the service quality QoS of phone user; h _jfor the service quality QoS of D2D user's link; for the minimum quality of service qos requirement of phone user, for the minimum quality of service qos requirement of D2D user's link; q _i,jfor phone user i and D2D user link the coupling indicator variable of j, q _i,j∈ 0,1}, and when the frequency spectrum resource of a jth D2D user to multiplexing i-th phone user time, q _i,j=1, other time q _i,j=0; for the transmitted power of phone user i; for D2D user links the transmitted power of j; represent the maximum power restriction of phone user and D2D user's link respectively;

Under the restriction of qos requirement and power, resource sharing can be carried out between not every phone user and D2D user, therefore, may have that phone user is used alone frequency spectrum resource, D2D user links and use orthogonal frequency range but not occur with the situation such as phone user's shared resource, as shown in the bipartite graph of Fig. 3, upper part in figure is made up of N number of phone user's resource and M the orthogonal D2D resource of frequency range, and lower part is linked by N number of phone user and M the D2D user enlivened and forms.Therefore, can meet restrictive condition if do not have D2D user to link thus use i-th phone user's resource of frequency range, i-th phone user's frequency range uses just to separately i-th phone user, and corresponding limit weights are:

$w_{i,i}=\underset{P_i^c\≤P_{i,\max }^c,P_j^d=0}{\max }{f}_i,i=1,...,N---\left(2a\right)$

Same, if D2D user's link can not find phone user carry out shared resource, then distribute independent orthogonal frequency range, corresponding limit weights are:

w _N+j,N+j＝0,j＝1,...,M (2b)

Other limit weights are defined as follows:

$w_{i,N+i}=\underset{\begin{array}{c}{P}_i^c\≤P_{i,\max }^c,P_j^d\≤P_{j,\max }^d\\ f_i^c\≥f_{i,\min }^c,h_j^d\≥h_{j,\min }^d\end{array}}{\max }(f_i+h_j),\begin{array}{c}i=1,...,N\\ j=1,...,M\end{array}---\left(2c\right)$

Therefore, the coupling between phone user's resource and D2D user's link be completed, be D2D user and link and select suitable frequency spectrum resource to utilize, will to coupling variable q _i,jbe optimized.

Which first, first carry out judging can carry out resource-sharing between phone user and D2D user's link.Use D ⁽ⁱ⁾expression can multiplexing phone user i frequency spectrum resource D2D user link set, C ^(j)represent that D2D user links the set of the multiplexing all cell resources of j energy.With represent that phone user i and D2D user link the letter interference ratio requirement of j respectively.Wherein

${\mathrm{\ξ}}_i^c=\frac{P_i^c{g}_{i,B}}{\underset{j\∈D}{\mathrm{\Σ}}{q}_{i,j}{P}_j^d{h}_{j,B}+{\mathrm{\σ}}_N^2},\∀i\∈C---\left(3a\right)$

${\mathrm{\ξ}}_j^d=\frac{P_j^d{g}_j}{\underset{i\∈C}{\mathrm{\Σ}}{q}_{i,j}{P}_i^c{h}_{i,j}+{\mathrm{\σ}}_N^2},\∀j\∈D---\left(3a\right)$

Therefore, can obtain:

$D^{\left(i\right)}=\{j\∈D:{\mathrm{\ξ}}_j^d(P_i^c,P_j^d)\≥{\mathrm{\ξ}}_{j,\min }^d\}---\left(4a\right)$

${\mathrm{\ξ}}_i^c\≥{\mathrm{\ξ}}_{i,\min }^c,P_i^c\≤P_{i,\max }^c,P_j^d\≤P_{j,\max }^d,\∀i\∈C,\∀j\∈D---\left(4b\right)$

Wherein represent the minimum letter interference ratio requirement of phone user and D2D user's link respectively.

For cell resource i, D ⁽ⁱ⁾only have at most a D2D user to link in set can meet restrictive condition thus use this frequency spectrum resource.

In actual applications, f _iand h _jmany indexes can be set as the case may be: f _iand h _jbe data rate; f _iand h _jbe safe capacity; f _iand h _jone is data rate, and one is safe capacity etc.At this, target function can be set as the data rate of phone user and the data rate sum of D2D user's link.With represent the data rate of phone user and D2D user's link respectively, namely have again:

$R_i^c={\log }_2[1+\frac{P_i^c{g}_{i,B}}{\underset{j\∈D^{\left(i\right)}}{\mathrm{\Σ}}{q}_{i,j}{P}_j^d{h}_{j,B}+{\mathrm{\σ}}_N^2}]---\left(5a\right)$

$R_j^d={\log }_2[1+\frac{P_j^d{g}_j}{\underset{i\∈C^{\left(j\right)}}{\mathrm{\Σ}}{q}_{i,j}{P}_i^c{h}_{i,j}+{\mathrm{\σ}}_N^2}]---\left(5b\right)$

Therefore, the optimization of target function can be expressed as:

$\begin{array}{cc}\underset{q_{i,j},P_i^c,P_j^d}{\max }& \underset{i\∈C^{\left(j\right)},j\∈D^{\left(i\right)}}{\mathrm{\Σ}}(R_i^c+q_{i,j}{R}_j^d)---\left(6\right)\end{array}$

Q _i,jin the optimizing process of value, first, adopt two-way backward selection algorithm IPPO from the D2D user having minimum optional limit (popularity is minimum) links, select the phone user having a minimum optional limit to be matched to right, and carry out power optimization and obtain corresponding maximum data rate.If there is multiple phone user to have minimum optional limit simultaneously, then power optimization carried out respectively to these limits and obtain corresponding maximum data rate, the limit weights that namely every bar limit is corresponding, and select the phone user of corresponding sides maximum weight to mate.And then repeat a upper process to except other users matched except user.

The D2D user link preferentially minimum to optional limit due to the present invention is mated, and therefore can ensure overall coupling satisfaction to a certain extent, and not need to carry out a large amount of iteration, thus significantly reduce complexity.

Such as: be in single cellular network of 300m at a radius, the point getting N number of random distribution is as phone user, and the point getting the obedience Poisson distribution that M adjusts the distance close links as D2D user.Set path loss index is 3, and antenna gain is 15dbi, ${\mathrm{\ξ}}_{i,\min }^c={\mathrm{\ξ}}_{j,\min }^d=10\mathrm{dB},P_{i,\max }^c=24\mathrm{dB},P_{j,\max }^d=21\mathrm{dB}.$

Fig. 4 and Fig. 5 illustrates phone user number N, and D2D user links the impact of number M on total data rate.As can be seen from Figure 4, when M fixes, total data rate increases along with the increase of phone user number N.Reason is that N is larger when M fixes, and means that D2D user's chain is connected to more phone user's resource and can selects, also just may have more excellent coupling.Same, as shown in Figure 5, when N fixes, when N is greater than M, the increase of M means the increase be matched to number, and namely more D2D user's link means better match condition, and therefore total data rate also increases thereupon.Meanwhile, also can find out in Fig. 4 and Fig. 5 larger, total data rate is larger.

Also can find out from two figure, KM algorithm can obtain optimum total data rate, and IPPO algorithm takes second place, and random access scheme is then the poorest.Also can find out that systematic function gap that IPPO algorithm is corresponding with KM algorithm is relative to little random access scheme.

It is the computing time of algorithms of different correspondence under different parameters shown in Fig. 6.When the statistical computation time, in two kinds of situation: only consider user's coupling (pairing only, PO), consider user's coupling and power optimization (pairing and power optimization, PPO).As can be seen from Figure 6, along with the increase of phone user number N, the computing time that KM algorithm is corresponding sharply increases, the computing time of random access algorithm is minimum, also have almost no change, the computing time that IPPO algorithm is corresponding is also almost constant, only takes time greatly a bit than random access algorithm.Same, can find out, the computing time that PPO is corresponding is more slightly larger than PO.

As can be seen from above comparing result, the systematic function adopting IPPO algorithm to obtain only than take KM algorithm time a bit, between KM algorithm and accidental access method, however computing time but relatively KM algorithm greatly reduce.

Fig. 7 is that a kind of D2D user that the embodiment of the present invention two proposes links the module map with the distributor of phone user's shared resource, and as shown in Figure 7, described device comprises:

Search module 201, right for searching all feasible shared combination between phone user and D2D user's link meeting the pre-conditioned resource-sharing carried out;

Relation sets up module 202, for setting up the corresponding relation between phone user and phone user's resource that D2D user links and feasible shared combination is right;

First resource distribution module 203, for according to described corresponding relation by the D2D user be in a disadvantageous position link with can be linked the minimum phone user of number by the D2D user of resource-sharing and carry out phone user's resource-sharing, described in the D2D user that is in a disadvantageous position be linked as and can share the minimum D2D user of phone user's resource number and link.

Wherein, when have in cellular network simultaneously multiple can be linked the minimum phone user of number by the D2D user of resource-sharing time, described first resource distribution module specifically comprises joint Power and optimizes unit and resource allocation unit, wherein, joint Power optimizes unit, for in above-mentioned multiple phone user and current all D2D user's links, respectively combination is linked to each phone user and D2D user and carry out joint Power optimization, obtain the maximum target system remuneration that each group is corresponding; Resource allocation unit, carries out phone user's resource-sharing for selecting to make the maximum phone user of goal systems remuneration and D2D user link combination.

In the embodiment of the present invention, described device also comprises:

Secondary resource distribution module, for there is no to carry out D2D user's link of resource-sharing at current cellular users, for current cellular users retain self phone user's resource.

In the embodiment of the present invention, described device also comprises:

Information resources distribution module, for not having the phone user that can carry out resource-sharing when current D2D user's link, distributes other band resource for current D2D user links.

The embodiment of the present invention three also proposed the distribution system of a kind of D2D user link and phone user's shared resource, and this system D2D user comprised as shown in Figure 7 links the distributor with phone user's shared resource.Wherein, D2D user's link introduces technical scheme with the distributor of phone user's shared resource with the structure shown in Fig. 7.This D2D user link comprises with the distribution of phone user's shared resource searches module 201, right for searching all feasible shared combination between phone user and D2D user's link meeting the pre-conditioned resource-sharing carried out; Relation sets up module 202, for setting up the corresponding relation between phone user and phone user's resource that D2D user links and feasible shared combination is right; First resource distribution module 203, for according to described corresponding relation by the D2D user be in a disadvantageous position link with can be linked the minimum phone user of number by the D2D user of resource-sharing and carry out phone user's resource-sharing, described in the D2D user that is in a disadvantageous position be linked as and can share the minimum D2D user of phone user's resource number and link.In addition, the resource allocation device of this system can also comprise: Secondary resource distribution module, for there is no to carry out D2D user's link of resource-sharing at current cellular users, for current cellular users retain self phone user's resource.Information resources distribution module, for not having the phone user that can carry out resource-sharing when current D2D user's link, distributes other band resource for current D2D user links.

The D2D user's link adopting the present invention to propose and distribution method, the Apparatus and system of phone user's shared resource, tool has the following advantages:

The present invention carry out resource matched before first determine shareable resource user set, reduce computation complexity, and for following resource two-way choice coupling needed for reach QoS guarantee provide support;

Phone user's resource that the present invention selects optional limit minimum from D2D user's link that optional limit is minimum is mated, get off successively, achieve the coupling between user as much as possible and resource, more D2D users can be communicated, more resource can be re-used, ensure that both sides' satisfaction, effectively improve systematic function;

Relative to KM algorithm, the present invention does not need to carry out power optimization to all limits and calculates limit weights, and the matching process between D2D user and phone user's resource is simple, need not need not stop iteration and look for Optimum Matching, greatly reduce computing time as KM algorithm;

Through the above description of the embodiments, those skilled in the art can be well understood to the present invention can by hardware implementing, and the mode that also can add necessary general hardware platform by software realizes.Based on such understanding, technical scheme of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions and perform method described in each embodiment of the present invention in order to make a computer equipment (can be personal computer, server, or the network equipment etc.).

It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.

It will be appreciated by those skilled in the art that the module in the device in embodiment can carry out being distributed in the device of embodiment according to embodiment description, also can carry out respective change and be arranged in the one or more devices being different from the present embodiment.The module of above-described embodiment can merge into a module, also can split into multiple submodule further.

Be only several specific embodiment of the present invention above, but the present invention is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.

Claims (10)

1. a distribution method for D2D user's link and phone user's shared resource, it is characterized in that, described method comprises:

S1. all feasible shared combination between phone user and D2D user's link meeting the pre-conditioned resource-sharing carried out is searched right;

S2. the corresponding relation between phone user and phone user's resource that D2D user links and feasible shared combination is right is set up;

S3. according to described corresponding relation by the D2D user be in a disadvantageous position link with can be linked the minimum phone user of number by the D2D user of resource-sharing and carry out phone user's resource-sharing, described in the D2D user that is in a disadvantageous position be linked as and can share the minimum D2D user of phone user's resource number and link.

2. method according to claim 1, is characterized in that, describedly pre-conditionedly to comprise: one or more in QoS of customer requirement, safe class requirement, minimum safe capacity, most high bit-error and user's maximum transmission power restriction thresholding.

3. method according to claim 1, is characterized in that, when have in cellular network simultaneously multiple can be linked the minimum phone user of number by the D2D user of resource-sharing time, described step S3 comprises:

In above-mentioned multiple phone user and current all D2D user's links, respectively combination is linked to each phone user and D2D user and carry out joint Power optimization, obtain the maximum target system remuneration that each group is corresponding;

Select to make the maximum phone user of goal systems remuneration and D2D user link combination and carry out phone user's resource-sharing.

4. method according to claim 1, is characterized in that, described method also comprises:

If current cellular users does not have to carry out D2D user's link of resource-sharing, then for current cellular users reservation self phone user's resource.

5. method according to claim 1, is characterized in that, described method also comprises:

If current D2D user's link does not have the phone user that can carry out resource-sharing, then distribute other band resource for current D2D user links.

6. a distributor for D2D user's link and phone user's shared resource, it is characterized in that, described device comprises:

Search module, right for searching all feasible shared combination between phone user and D2D user's link meeting the pre-conditioned resource-sharing carried out;

Relation sets up module, for setting up the corresponding relation between phone user and phone user's resource that D2D user links and feasible shared combination is right;

First resource distribution module, for according to described corresponding relation by the D2D user be in a disadvantageous position link with can be linked the minimum phone user of number by the D2D user of resource-sharing and carry out phone user's resource-sharing, described in the D2D user that is in a disadvantageous position be linked as and can share the minimum D2D user of phone user's resource number and link.

7. device according to claim 6, is characterized in that, when have in cellular network simultaneously multiple can be linked the minimum phone user of number by the D2D user of resource-sharing time, described first resource distribution module comprises:

Joint Power optimizes unit, in above-mentioned multiple phone user and current all D2D user's links, links combination respectively and carries out joint Power optimization, obtain the maximum target system remuneration that each group is corresponding to each phone user and D2D user;

Resource allocation unit, carries out phone user's resource-sharing for selecting to make the maximum phone user of goal systems remuneration and D2D user link combination.

8. device according to claim 6, is characterized in that, described device also comprises:

Secondary resource distribution module, for there is no to carry out D2D user's link of resource-sharing at current cellular users, for current cellular users retain self phone user's resource.

9. device according to claim 6, is characterized in that, described device also comprises:

Information resources distribution module, for not having the phone user that can carry out resource-sharing when current D2D user's link, distributes other band resource for current D2D user links.

10. D2D user's link and a distribution system for phone user's shared resource, is characterized in that, comprises the distributor of the arbitrary described D2D user link of claim 6-9 and phone user's shared resource.