CN107172659B - Method and device for resource allocation - Google Patents

Abstract

The embodiment of the invention provides the methods of resource allocation, comprising: obtain resource to be allocated D2D pairs of terminal direct connection and current reusable frequency spectrum；For resource to be allocated D2D to the traversal multiplexing current reusable frequency spectrum, combine the phone user CUE in each frequency spectrum, obtain in any frequency spectrum D2D to achievable maximum power efficiency value；It is the D2D of the resource to be allocated to the reusable frequency spectrum of distribution according to the corresponding maximum power efficiency value of each frequency spectrum.On the basis of guaranteeing phone user CUE service quality, by successive interference cancellation techniques, the upper limit of the energy efficiency of D2D user can be promoted.

Description

Method and device for resource allocation

technical field

The invention relates to the technical field of mobile communication, in particular to a method and device for optimizing energy efficiency.

Background technique

With the rapid popularization of smartphones and wearable devices, the spectral efficiency and energy efficiency of wireless networks need to be improved urgently. At the same time, the existing wireless network architecture centered on a BS (Base Station, base station) causes the BS to bear too much network load. D2D (Device-to-Device, terminal direct connection) technology allows adjacent UEs (User Equipment, users) to directly transmit data without passing through the BS, and can transfer the network load from the BS side to the UE side, taking advantage of the good channel characteristics between UEs , can significantly improve the spectral efficiency and energy efficiency of the system, and thus has achieved considerable development, and is considered to be one of the key technologies in 5G mobile networks. However, the introduction of DUE (D2D UE, D2D user) in the cellular network will inevitably lead to a more complex electromagnetic environment, and even seriously damage the system performance. Therefore, it is particularly important to design a reasonable and effective interference management scheme.

So far, domestic and foreign research institutions have carried out a lot of research, but most of the work focuses on improving the overall throughput of the system or ensuring the service quality of CUE (Cellular UE, cellular user), and only a small part of work is devoted to optimizing DUE energy efficiency. In the latter, the existing algorithms either have too high computational complexity, or the final performance improvement is not obvious, and there is still room for further improvement.

Contents of the invention

In view of the above problems, embodiments of the present invention are proposed to provide a resource allocation method and device for overcoming the above problems or at least partially solving the above problems.

In order to solve the above problems, the embodiment of the present invention discloses a method for resource allocation, including: acquiring the D2D pairs of resources to be allocated and the current multiplexable frequency spectrum; traversing and multiplexing the current multiplexable combined with the CUE in each spectrum to obtain the maximum energy efficiency value that can be realized by D2D pairs in each spectrum; used spectrum.

Further, the combining the CUEs in each frequency spectrum to obtain the maximum energy efficiency value achievable by D2D pairs in each frequency spectrum includes: setting the transmission power of the CUE according to the minimum transmission rate of the CUE; obtaining the first energy efficiency value, according to The first energy efficiency value, the transmit power of the CUE, the channel gain between the D2D pair, and the channel gain between the D2D receiving end and the CUE obtain a first transmit power, and the first transmit power is the D2D transmit terminal transmit power; obtain the current energy efficiency value according to the first transmit power and the transmit power of the CUE; determine whether the current energy efficiency value is the maximum according to the first energy efficiency value and the current energy efficiency value Energy efficiency value; if the current energy efficiency value is not the maximum energy efficiency value, update the current energy efficiency value as the new first energy efficiency value until the current energy efficiency value is the maximum energy efficiency value .

Further, the obtaining the current energy efficiency value according to the first transmission power and the transmission power of the CUE includes: according to the first transmission power, the transmission power of the CUE, the channel gain between D2D pairs, and the D2D The channel gain between the receiving end and the CUE generates the D2D transmission rate; generates the current energy efficiency value according to the D2D transmission rate, inherent circuit loss, first transmission power, and D2D energy conversion efficiency.

Further, the acquiring the terminal direct access D2D pair of resources to be allocated and the current multiplexable frequency spectrum includes: acquiring the D2D pair with the highest priority among the D2D pairs not currently allocated resources as the D2D pair of the resources to be allocated; acquiring the currently available D2D pair A multiplexed frequency spectrum, where no D2D pair is connected to the multiplexable frequency spectrum.

Further, the allocating the reusable frequency spectrum for the D2D pair of resources to be allocated according to the maximum energy efficiency value corresponding to each frequency spectrum includes: obtaining the maximum energy efficiency value corresponding to each frequency spectrum, and selecting the maximum energy efficiency value from it The spectrum with the largest value; allocate the spectrum with the largest maximum energy efficiency value to the D2D pair of resources to be allocated and delete the spectrum from the currently multiplexable spectrum.

The embodiment of the present invention also discloses a device for resource allocation, including:

An acquisition unit, configured to acquire the terminal direct D2D pair to be allocated resources and the current multiplexable frequency spectrum;

The processing unit is configured to traverse and multiplex the currently reusable frequency spectrum obtained by the obtaining unit for the D2D pairs of resources to be allocated obtained by the obtaining unit, combine the CUE in each frequency spectrum, and obtain the available D2D pairs in each frequency spectrum. The maximum energy efficiency value achieved;

The allocating unit is configured to allocate multiplexable frequency spectrums for the D2D pairs to be allocated resources according to the maximum energy efficiency value corresponding to each frequency spectrum obtained by the processing unit.

Further, the processing unit includes:

A setting module, configured to set the transmission power of the CUE according to the minimum transmission rate of the CUE;

The first execution module is configured to obtain a first energy efficiency value, and obtain the second energy efficiency value according to the first energy efficiency value, the transmit power of the CUE, the channel gain between the D2D pair, and the channel gain between the D2D receiving end and the CUE. a transmit power, the first transmit power is the transmit power of the D2D transmit end;

A second execution module, configured to acquire a current energy efficiency value according to the first transmit power and the transmit power of the CUE;

A determining module, configured to determine whether the current energy efficiency value is a maximum energy efficiency value according to the first energy efficiency value and the current energy efficiency value;

A third execution module, configured to update the current energy efficiency value as a new first energy efficiency value until the current energy efficiency value is the largest if the current energy efficiency value is not the maximum energy efficiency value energy efficiency value.

Further, the second execution module includes:

A first generating submodule, configured to generate a D2D transmission rate according to the first transmission power, the transmission power of the CUE, the channel gain between the D2D pair, and the channel gain between the D2D receiving end and the CUE;

The second generation sub-module is configured to generate the current energy efficiency value according to the D2D transmission rate, inherent circuit loss, first transmit power, and D2D to energy conversion efficiency.

Further, the acquisition unit includes:

The first obtaining module is used to obtain the D2D pair with the highest priority among the D2D pairs not currently allocated resources as the D2D pair to be allocated resources;

The second acquiring module is configured to acquire a current reusable frequency spectrum, and no D2D pair is connected to the reusable frequency spectrum.

Further, the allocation unit includes:

The selection module is used to obtain the maximum energy efficiency value corresponding to each spectrum, and select the spectrum with the maximum maximum energy efficiency value;

The fourth execution module is configured to allocate the frequency spectrum with the largest maximum energy efficiency value to the D2D pair of resources to be allocated and delete the frequency spectrum from the current multiplexable frequency spectrum.

Embodiments of the present invention include the following advantages:

In the embodiment of the present invention, the D2D pair to be allocated resources traverses and multiplexes the current multiplexable frequency spectrum, combines the CUE in each frequency spectrum, and obtains the maximum energy efficiency value that can be realized by the D2D pair in any frequency spectrum; according to each The maximum energy efficiency value corresponding to each frequency spectrum, allocates a reusable frequency spectrum for the D2D pair of resources to be allocated. On the basis of ensuring the service quality of the CUE, the upper limit of the energy efficiency of the DUE can be raised with the help of the serial interference cancellation technology.

Description of drawings

Fig. 1 is a flow chart of the steps of a resource allocation method of the present invention;

Fig. 2 is the step flowchart of step 102 in the method shown in Fig. 1;

Fig. 3 is a system model applicable to a resource allocation method of the present invention;

Fig. 4 is a flow chart of steps of a resource allocation method of the present invention;

Fig. 5 is a flow chart of steps using joint power control in the steps of the method shown in Fig. 4;

FIG. 6 is a structural block diagram of an embodiment of a device for resource allocation in the present invention;

Fig. 7 is a structural block diagram of a processing unit in the structure shown in Fig. 6;

Fig. 8 is a structural block diagram of the second execution module in the structure shown in Fig. 7;

Fig. 9 is a structural block diagram of the acquisition unit in the structure shown in Fig. 6;

Fig. 10 is a structural block diagram of an allocation unit in the structure shown in Fig. 6;

Fig. 11 is a structural block diagram of a base station of the present invention.

Detailed ways

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to FIG. 1 , it shows a flow chart of the steps of a resource allocation method of the present invention, which may specifically include the following steps:

Step 101. Obtain the direct-to-device D2D pairs to be allocated resources and the current spectrum that can be multiplexed.

In this embodiment, preferably, all D2D pairs that need to be allocated resources are obtained, and the D2D pairs are sorted and marked in descending order, so that the D2D pairs satisfy in Indicates the index set of D2D pairs, and d _j indicates the priority of (D _j , the jth D2D pair). The D2D pair with the highest priority in the index set is preferred for the D2D pair to be allocated resources. Specifically, in this embodiment, during initialization, N _d pairs of D2D pairs are obtained, the D2D pair with the highest priority is marked as D ₁ , and its reusable spectrum candidate set is obtained. It is worth noting that a CUE is connected to the spectrum in each reusable spectrum candidate set, and only the CUE is connected but no D2D pair is connected.

Specifically, the acquisition of the terminal direct D2D pair to be allocated resources and the current spectrum that can be reused may include: acquiring the D2D pair with the highest priority among the D2D pairs that are not currently allocated resources as the D2D pair to be allocated resources; acquiring the current A reusable frequency spectrum, where no D2D pair is connected to the reusable frequency spectrum.

In this embodiment, the priority may be preset, or a corresponding priority may be generated according to the actual demand of D2D for energy efficiency, which is not limited in this embodiment.

Step 102 , traversing and multiplexing the currently multiplexable spectrum for the D2D pairs to be allocated resources, combining the CUE in each spectrum to obtain the maximum energy efficiency value that can be realized by the D2D pair in each spectrum.

In this embodiment, a method based on Bisection-Search and Dinkelbach is used to perform joint power control on the CUE and D2D, and ultimately maximize the energy efficiency of the D2D link.

For example, in this embodiment, the transmit powers of CUE(C _i ) and DUE(D _j ) are defined as and Define the maximum transmission rate of D _j as The minimum transmission rate of C _i is Let η ≤ 1 denote the energy conversion efficiency of the D2D pair, P _cir the inherent circuit loss of the DUE, and U _i,j the energy efficiency of D _j . Initialization parameter n=0, ε=10 ⁻⁵ . can prove the formula is a about convex function of . Therefore, using the Bisection-Search method, the optimal transmit power of the D2D sender can be quickly obtained as

Inspired by Dinkelbach's method, during iteration, one can set speed up convergence. The iterative process continues, setting n=n+1. Analyzing conditions Whether it is established. If it is true, end the power control process, otherwise, repeat the above steps until the judgment condition is true.

In the above example, let D _j traverse and reuse its candidate set In the spectrum i, define Indicates the CUE corresponding to spectrum i, performs joint power control on (C _i , D _j ), and then obtains the maximum energy efficiency that D _j can achieve by comparing And its corresponding spectrum i ^* .

Step 103 , according to the maximum energy efficiency value corresponding to each frequency spectrum, allocate multiplexable frequency spectrums for the D2D pairs whose resources are to be allocated.

Further, in order to avoid multiplexing the same frequency spectrum for a single CUE and multiple D2D pairs, based on the specific example of step 102, update the spectrum candidate set of D _j+1 as Set j=j+1. Analyzing conditions Whether it is established. If yes, end the resource allocation process; otherwise, repeat the steps of resource allocation until the resource allocation is completed for all D2D pairs.

In the embodiment of the present invention, the D2D pairs to be allocated resources traverse and multiplex the current multiplexable frequency spectrum, combine the CUE in each frequency spectrum, and obtain the maximum energy efficiency value that can be realized by the D2D pair in each frequency spectrum; according to each The maximum energy efficiency value corresponding to each frequency spectrum, allocates a reusable frequency spectrum for the D2D pair of resources to be allocated. On the basis of ensuring the service quality of the CUE, the upper limit of the energy efficiency of the DUE can be raised with the help of the serial interference cancellation technology.

Referring to FIG. 2 , it shows a flow chart of step 102 in Embodiment 1 of a resource allocation method of the present invention, which may specifically include the following steps:

Step 201. Set the transmit power of the CUE according to the minimum transmission rate of the CUE.

In this embodiment, because the energy efficiency of the D2D pair decreases with the increase of the transmit power of the CUE. Maximizing the energy efficiency of a D2D pair means reducing the CUE transmit power as much as possible. In addition, in order to ensure the minimum transmission rate of the CUE, it is necessary to set the transmit power of the CUE based on the minimum transmission rate of the CUE.

Specifically, the minimum transmit power of the CUE is set according to the conditions for the base station to perform SIC (Successive Interference Cancellation, serial interference cancellation) technology and the conditions for the base station to perform SUD (Single User Detection, single user detection).

Step 202: Obtain a first energy efficiency value, and obtain the first transmission power according to the first energy efficiency value, the transmission power of the CUE, the channel gain between the D2D pair, and the channel gain between the D2D receiving end and the CUE.

Wherein, the first transmission power is the transmission power of the D2D transmitting end.

In this embodiment, the first energy efficiency value may be a preset constant value, or may be a current energy efficiency value obtained from the last loop step when the loop is executed.

Step 203: Obtain the current energy efficiency value according to the first transmission power and the transmission power of the CUE.

Specifically, in an embodiment of the present invention, the step 203 may include: according to the first transmit power, the transmit power of the CUE, the channel gain between the D2D pair, and the channel between the D2D receiver and the CUE The gain generates the transmission rate of the D2D transmitter; generates the current energy efficiency value according to the transmission rate of the D2D transmitter, inherent circuit loss, first transmission power, and D2D to energy conversion efficiency.

Step 204: Determine whether the current energy efficiency value is a maximum energy efficiency value according to the first energy efficiency value and the current energy efficiency value.

Step 205. If the current energy efficiency value is not the maximum energy efficiency value, update the current energy efficiency value as a new first energy efficiency value until the current energy efficiency value is the maximum energy efficiency value.

Step 206: If the current energy efficiency value is a maximum energy efficiency value, use the maximum energy efficiency value as the optimal energy efficiency of the corresponding frequency spectrum.

In the embodiment of the present invention, the D2D pairs to be allocated resources traverse and multiplex the current multiplexable frequency spectrum, combine the CUE in each frequency spectrum, and obtain the maximum energy efficiency value that can be realized by the D2D pair in each frequency spectrum; according to each The maximum energy efficiency value corresponding to a frequency spectrum is used to allocate a reusable frequency spectrum for the D2D pair of resources to be allocated. On the basis of ensuring the quality of service of the cellular user, the upper limit of the energy efficiency of the DUE can be improved by means of the serial interference cancellation technology. .

In order to enable those skilled in the art to better understand a resource allocation method provided by the embodiment of the present invention, it is described in detail in the form of an actual application scenario in another embodiment of the present invention.

The system model applicable to this embodiment is shown in Figure 3, where the D2D pair can reuse the uplink spectrum of the cellular network, and the wireless resources used by the CUE are orthogonal to each other, and a single wireless spectrum can only be multiplexed by one D2D pair and one CUE at most, and A D2D pair can only reuse the spectrum resources of one CUE. The BS can execute the SIC process, g _{i, b} , g _{j, j} , g _{j, b} , g _{i, j} respectively represent the relationship between C _i and BS, D _j , D _j transmitting end and BS, C _i and D _j receiving end between channel gains. In this example, the specific steps of the resource allocation method shown in Figures 4 and 5 are as follows:

1. In the process of resource allocation, considering that different DUEs have different requirements on energy efficiency, this embodiment first introduces the concept of priority.

2. Arrange and mark D2D pairs in descending order so that they meet in Indicates the index set of D2D pairs, and d _j indicates the priority of D _j .

3. Initialize the reusable spectrum candidate set of D ₁ Let j=1.

4. Let D _j traverse and reuse its candidate set In the frequency spectrum i, and perform joint power control on (C _i , D _j ).

5. In the power control process, this embodiment proposes to use a method based on Bisection-Search and Dinkelbach to perform joint power control on (C _i , D _j ), and finally maximize the energy efficiency of D _j

in

is the maximum transmission rate of D _j ;

and are the transmission powers of C _i and D _j respectively, and their maximum values are respectively and

η≤1 means the energy conversion efficiency of the D2D pair;

P _cir represents the inherent circuit loss of DUE;

N ₀ is Gaussian noise power;

Γ is the SINR (Signal-to-Interference-plus-Noise Ratio, signal-to-interference-plus-noise ratio) gap.

6. It is worth noting that, from the expression of U _{i, j} , the energy efficiency of D2D varies with increase and decrease. Maximizing U _i,j means minimizing Furthermore, in order to guarantee the minimum transmission rate of C _i set up

in Conditions for performing SIC for base stations;

on the contrary, Then it represents the conditions for the base station to execute SUD, that is,

In this example, when When , the base station can first eliminate the interference caused by D2D transmitting users, and then detect the transmission signal of the CUE. At this time, the transmission rate of the CUE can be directly expressed as

otherwise The transmission rate of CUE is expressed as

Subject to minimum transfer rate and maximum transmit power common limitation of The feasible region of can be expressed as:

7. Set parameter n=0, ε=10 ⁻⁵ .

8. Firstly, the energy efficiency maximization problem of D _j convert to form definition During iteration for

can prove is about power is a convex function, that is, its first derivative is about The monotonically decreasing function of . Using the Bisection-Search method can solve the D2D optimal transmit power

where in the formula middle,

for dependent variable.

9. Then, inspired by Dinkelbach's method, set Accelerated convergence to optimal energy efficiency

10. Continue the iterative process, set n=n+1, and judge the condition Whether it is established. If it is established, proceed to the next step; otherwise, repeat steps 5 to 10.

11. Traverse to get all energy efficiencies corresponding to D _j Then by comparison, determine the maximum energy efficiency that D _j can achieve And its corresponding spectrum i ^* .

12. To avoid multiplexing the same frequency spectrum between a single cellular user and multiple D2D pairs, set The spectrum candidate set of is

13. Set j=j+1, judge the condition Whether it is established. If yes, end the energy efficiency optimization method; otherwise, repeat step 4 to step 13 .

Referring to FIG. 6, it shows a structural block diagram of an embodiment of a resource allocation device according to the present invention, which may specifically include the following modules:

An obtaining unit 601, configured to obtain a UE-direct D2D pair to be allocated resources and a current multiplexable frequency spectrum;

The processing unit 602 is configured to traverse and multiplex the current multiplexable frequency spectrum obtained by the obtaining unit for the D2D pairs of resources to be allocated obtained by the obtaining unit, combine the CUE in each frequency spectrum, and obtain the D2D pair in each frequency spectrum Achievable maximum energy efficiency value;

The allocating unit 603 is configured to allocate multiplexable frequency spectrums for the D2D pairs of resources to be allocated according to the maximum energy efficiency value corresponding to each frequency spectrum obtained by the processing unit.

In an example, as shown in FIG. 7, the processing unit 602 may include:

A setting module 701, configured to set the transmission power of the CUE according to the minimum transmission rate of the CUE;

The first execution module 702 is configured to obtain a first energy efficiency value, which is obtained according to the first energy efficiency value, the transmit power of the CUE, the channel gain between the D2D pair, and the channel gain between the D2D receiving end and the CUE a first transmit power, where the first transmit power is the transmit power of the D2D transmit end;

The second execution module 703 is configured to obtain the current energy efficiency value according to the first transmit power and the transmit power of the CUE;

A determining module 704, configured to determine whether the current energy efficiency value is a maximum energy efficiency value according to the first energy efficiency value and the current energy efficiency value;

The third execution module 705 is configured to update the current energy efficiency value as a new first energy efficiency value until the current energy efficiency value is the maximum if the current energy efficiency value is not the maximum energy efficiency value energy efficiency value.

In an example, as shown in FIG. 8, the second execution module 703 includes:

The first generation submodule 801 is configured to generate a D2D transmission rate according to the first transmission power, the transmission power of the CUE, the channel gain between the D2D pair, and the channel gain between the D2D receiving end and the CUE;

The second generation sub-module 802 is configured to generate a current energy efficiency value according to the D2D transmission rate, inherent circuit loss, first transmit power, and D2D to energy conversion efficiency.

In an example, as shown in FIG. 9, the acquiring unit includes:

The first acquiring module 901 is configured to acquire the D2D pair with the highest priority among the D2D pairs that are currently unallocated resources as the D2D pair to be allocated resources;

The second acquiring module 902 is configured to acquire a current reusable frequency spectrum, and no D2D pair is connected to the reusable frequency spectrum.

In an example, as shown in FIG. 10, the allocating unit 603 includes:

The selection module 1001 is used to obtain the maximum energy efficiency value corresponding to each spectrum, and select the spectrum with the maximum maximum energy efficiency value;

The fourth execution module 1002 is configured to allocate the frequency spectrum with the largest maximum energy efficiency value to the D2D pair of resources to be allocated and delete the frequency spectrum from the current multiplexable frequency spectrum.

Fig. 11 shows a base station according to an exemplary embodiment. The base station in the example may include the apparatus for allocating resources shown in FIGS. 6-10 .

As for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and for related parts, please refer to the part of the description of the method embodiment.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, devices, or computer program products. Accordingly, embodiments of the invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, embodiments of the invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

Embodiments of the present invention are described with reference to flowcharts and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor or processor of other programmable data processing terminal equipment to produce a machine such that instructions executed by the computer or processor of other programmable data processing terminal equipment Produce means for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing terminal to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the The instruction means implements the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded into a computer or other programmable data processing terminal equipment, so that a series of operational steps are performed on the computer or other programmable terminal equipment to produce computer-implemented processing, thereby The instructions executed above provide steps for implementing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

Having described preferred embodiments of embodiments of the present invention, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, the appended claims are intended to be construed to cover the preferred embodiment and all changes and modifications which fall within the scope of the embodiments of the present invention.

Finally, it should also be noted that in this text, relational terms such as first and second etc. are only used to distinguish one entity or operation from another, and do not necessarily require or imply that these entities or operations, any such actual relationship or order exists. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or terminal equipment comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements identified, or also include elements inherent in such a process, method, article, or end-equipment. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or terminal device comprising said element.

The description of the above embodiments is only used to help understand the method of the present invention and its core idea; meanwhile, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and scope of application. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims (7)

1. A method for resource allocation, comprising: Obtain the terminal direct D2D pair to be allocated resources and the current spectrum that can be reused; Traversing and multiplexing the currently reusable spectrum for the D2D pairs to be allocated resources, and combining the cellular user CUE in each spectrum to obtain the maximum energy efficiency value that can be realized by the D2D pair in each spectrum; Allocating a reusable spectrum for the D2D pair of resources to be allocated according to the maximum energy efficiency value corresponding to each spectrum; The combination of CUE in each frequency spectrum to obtain the maximum energy efficiency value achievable by D2D pairs in each frequency spectrum includes: Set the transmission power of the CUE according to the minimum transmission rate of the CUE; Obtain a first energy efficiency value, and obtain the first transmit power according to the first energy efficiency value, the transmit power of the CUE, the channel gain between the D2D pair, and the channel gain between the D2D receiving end and the CUE, the first transmit power A transmission power is the transmission power of the D2D transmitting end; Generate the transmission rate of the D2D transmitter according to the first transmit power, the transmit power of the CUE, the channel gain between the D2D pair, and the channel gain between the D2D receiver and the CUE; according to the transmission rate of the D2D transmitter, the inherent The circuit loss, the first transmit power, and the D2D energy conversion efficiency generate a current energy efficiency value; determining whether the current energy efficiency value is a maximum energy efficiency value according to the first energy efficiency value and the current energy efficiency value; If the current energy efficiency value is not the maximum energy efficiency value, update the current energy efficiency value as a new first energy efficiency value until the current energy efficiency value is the maximum energy efficiency value. 2. The method according to claim 1, wherein the acquisition of the UE-to-be-allocated resource D2D pair and the current spectrum that can be reused comprises: Obtain the D2D pair with the highest priority among the D2D pairs that are currently unallocated resources as the D2D pair to be allocated resources; Obtain the currently reusable frequency spectrum, and no D2D pair is connected to the reusable frequency spectrum. 3. The method according to claim 1, wherein the allocating a reusable spectrum for the D2D pair of resources to be allocated according to the maximum energy efficiency value corresponding to each spectrum comprises: Obtain the maximum energy efficiency value corresponding to each spectrum, and select the spectrum with the maximum maximum energy efficiency value; Allocating the spectrum with the largest maximum energy efficiency value to the D2D pair of resources to be allocated and deleting the spectrum from the currently multiplexable spectrum. 4. A device for resource allocation, comprising: An acquisition unit, configured to acquire the terminal direct D2D pair to be allocated resources and the current multiplexable frequency spectrum; The processing unit is configured to traverse and multiplex the currently reusable frequency spectrum obtained by the obtaining unit for the D2D pairs of resources to be allocated obtained by the obtaining unit, combine the CUE in each frequency spectrum, and obtain the available D2D pairs in each frequency spectrum. The maximum energy efficiency value achieved; An allocating unit, configured to allocate multiplexable spectrums for the D2D pairs of resources to be allocated according to the maximum energy efficiency value corresponding to each spectrum obtained by the processing unit; The processing unit includes: A setting module, configured to set the transmission power of the CUE according to the minimum transmission rate of the CUE; The first execution module is configured to obtain a first energy efficiency value, and obtain the second energy efficiency value according to the first energy efficiency value, the transmit power of the CUE, the channel gain between the D2D pair, and the channel gain between the D2D receiving end and the CUE. a transmit power, the first transmit power is the transmit power of the D2D transmit end; The second execution module is configured to generate the transmission rate of the D2D transmitter according to the first transmit power, the transmit power of the CUE, the channel gain between the D2D pair, and the channel gain between the D2D receiver and the CUE; according to the The transmission rate of the D2D transmitter, the inherent circuit loss, the first transmit power, and the current energy efficiency value of the D2D energy conversion efficiency; A determining module, configured to determine whether the current energy efficiency value is a maximum energy efficiency value according to the first energy efficiency value and the current energy efficiency value; A third execution module, configured to update the current energy efficiency value as a new first energy efficiency value until the current energy efficiency value is the largest if the current energy efficiency value is not the maximum energy efficiency value energy efficiency value. 5. The device according to claim 4, wherein the second execution module comprises: A first generation submodule, configured to generate a D2D transmission rate according to the first transmission power, the transmission power of the CUE, the channel gain between the D2D pair, and the channel gain between the D2D receiving end and the CUE; The second generation sub-module is configured to generate the current energy efficiency value according to the D2D transmission rate, inherent circuit loss, first transmission power, and D2D to energy conversion efficiency. 6. The device according to any one of claims 4-5, wherein the acquisition unit includes: The first obtaining module is used to obtain the D2D pair with the highest priority among the D2D pairs not currently allocated resources as the D2D pair to be allocated resources; The second acquiring module is configured to acquire a current reusable frequency spectrum, and no D2D pair is connected to the reusable frequency spectrum. 7. The device according to any one of claims 4-5, wherein the distribution unit comprises: The selection module is used to obtain the maximum energy efficiency value corresponding to each spectrum, and select the spectrum with the maximum maximum energy efficiency value; The fourth execution module is configured to allocate the frequency spectrum with the largest maximum energy efficiency value to the D2D pair of resources to be allocated and delete the frequency spectrum from the current multiplexable frequency spectrum.