CN109155921A

CN109155921A - Method and apparatus for device-to-device communication

Info

Publication number: CN109155921A
Application number: CN201680086073.4A
Authority: CN
Inventors: 姜戬
Original assignee: Nokia Technologies Oy
Current assignee: Nokia Technologies Oy
Priority date: 2016-05-25
Filing date: 2016-05-25
Publication date: 2019-01-04
Anticipated expiration: 2036-05-25
Also published as: WO2017201685A1; CN109155921B

Abstract

Embodiment of the disclosure provides the method, apparatus and computer program for communication.A method of it is realized at network node, include: acquisition network node and carry out the first channel state information of the channel between the first terminal equipment in cellular communication in network node, and from device-to-device (D2D) set of communication devices to the second channel status information of the channel of the receiver of cellular communication；Combined based on the first channel state information and second channel status information and determine the resource allocation communicated for cellular communication and D2D and the transimission power for D2D communication, so that the performance of the cellular communication of first terminal equipment is higher than predefined performance threshold；And the identified resource allocation for being used for cellular communication is sent to the first terminal equipment.By this method, it is ensured that the performance of cellular communication.

Description

Method and apparatus for device-to-device communication

Technical field

The non-limiting and example embodiment of the disclosure relate generally to wireless communication technical field, and more particularly to Method, apparatus and computer program for device-to-device (D2D) communication.

Background technique

This section, which describes, can help to more fully understand all aspects of this disclosure.Therefore, the statement of this section will be with this side Formula is read, and should not be construed as recognizing in the prior art perhaps no content in the prior art.

Since telecom operation Founder is making great efforts to meet the existing demand from mobile subscriber, so newly data-intensive answers With, such as occurring close to aware services.Although current forth generation (also referred to as 4G) cellular technology, such as by the third generation The senior long term evolution (LTE-A) of partner program (3GPP) exploitation can provide effective physics (PHY) layer and media are visited Ask control (MAC) layer solution and good performance, but its booming data for still lagging behind mobile subscriber needs It asks.The new architecture reformed to the traditional communication method of cellular network is already have accounted for, and D2D communication wherein is seemingly For follow-on promising solution.

In traditional cellular network, even if both sides involved in communication are close to each other, all communications must also pass through base Stand (BS), and this is suitable for traditional low data rate Information Mobile Service (such as audio call and text message), and/or works as and use When family is not enough approached to implement direct communication.On the contrary, D2D communication is defined as the direct communication between terminal device, that is, data Can another terminal device directly be sent to without passing through base station from a terminal device., game shared for such as video, High data rate service close to perception social networks etc has the mobile subscriber of demand may be potentially at model short enough To carry out direct communication (that is, D2D is communicated) in enclosing, and in this case, D2D communication can be utilized to improve wireless network Spectrum efficiency, handling capacity, energy efficiency, delay or the fairness of network.

D2D communication can realize in cellular frequency spectrum (that is, the frequency band for being exclusively used in cellular communication) or it can be awarded non- It is realized in the shared frequency spectrum of power.The former also referred to as disposes with interior D2D, and the latter is referred to as to be disposed with outer D2D.D2D communication is usual It is considered as the complementary solution of conventional cellular communication, and therefore in both above deployment, there are D2D communication and honeycombs A possibility that communication coexists.

In the cordless communication network that both D2D communication and cellular communication coexist, it may be necessary to be carried out to D2D communication effective Control is to avoid the significant negative effect to conventional cellular communication.

Summary of the invention

Recently, it has been proposed that the D2D communication under cellular infrastructure is as increasing the utilization of resources, improving user The means of the battery life of handling capacity and extension user equipment.However, such case also brings challenge to interference management.In order to Control D2D communication is to reduce the negative effect to non-D2D communication (for example, conventional cellular communication) (for example, interference), in the disclosure In provide method, apparatus and computer program.It should be appreciated that embodiment of the disclosure is not limited in cellular infrastructure lower part The exemplary scene of D2D communication is affixed one's name to, but can be widely applied to that there are other of similar problems scenes.

The various embodiments of the disclosure are directed primarily to provide logical with honeycomb for promoting the D2D in cordless communication network to communicate Letter coexists without causing the method, apparatus significantly to degrade and computer program to cellular communication.When read in conjunction with the accompanying drawings, It will also be appreciated that other feature and advantage of embodiment of the disclosure, attached drawing pass through exemplary from the description of following specific embodiments Mode shows the principle of embodiment of the disclosure.

In the first aspect of the disclosure, a kind of method realized at network node is provided.This method comprises: obtaining Network node and the first channel shape that the channel between the first terminal equipment in cellular communication is carried out in the network node State information, and bee is carried out the first terminal equipment from device-to-device D2D set of communication devices to the network node The second channel status information of the channel of the receiver of nest communication；Based on first channel state information and the second channel state Information is determined for the cellular communication of the first terminal equipment and the resource allocation of the D2D both and to combine for being somebody's turn to do First transimission power of D2D communication, so that the performance of the cellular communication of the first terminal equipment is higher than predefined performance threshold； And the identified resource allocation for being used for cellular communication is sent to the first terminal equipment.

In one embodiment, the determination can be executed under the conditions of at least one of the following conditions: for the D2D The overall transmission power of the D2D communication of set of communication devices is minimized, and Physical Resource Block, which is assigned to, to be in and the network node Not more than a terminal device and the Physical Resource Block carried out in cellular communication is assigned to being not more than for D2D communication One D2D pairs.

In another embodiment, the determination may include: at least based on first channel state information, second letter Channel state information and adjustable transimission power for D2D communication, calculate for the first terminal equipment and the network node it Between cellular communication signal and interference and noise power ratio SINR set；And it is selected from the calculated SINR set of institute high In the minimum SINR of predefined performance threshold；And will be used for D2D communication first transimission power be determined as with it is selected The corresponding transimission power of minimum SINR.

In yet another embodiment, the determination may include: that resource allocation and are determined by solving optimization problem One transimission power:

x_j=0,1

WhereinIndicate the transmission power for j-th of D2D transmitter in the D2D set of communication devices；If jth Resource block identical with the first terminal equipment is assigned in a D2D transmitter, then x_j=1, otherwise x_j=0；N is D2D communication The number of terminal device in cluster tool；Indicate j-th of D2D transmitter from the D2D set of communication devices to this The channel gain of one terminal device, and it is indicated by the second channel status information；P_BIndicate the transmission of the network node Power；h_BCIt indicates from the network node to the channel gain of the first terminal equipment, and it is by first channel state information It indicates, γ_minIndicate the predefined performance threshold for being used for the first terminal equipment, and it can be in one embodiment It is predefined SINR value, and N indicates the received noise power at the first terminal equipment.

In one embodiment, the determination may include: to determine resource allocation and first by solving optimization problem Transimission power:

x_j=0,1

WhereinIndicate the transmission power for j-th of D2D transmitter in the D2D set of communication devices；If jth Resource block identical with the first terminal equipment is assigned in a D2D transmitter, then x_j=1, otherwise x_j=0；N is D2D communication The number of terminal device in cluster tool,Indicate the channel gain from j-th of D2D transmitter to the network node, and It is indicated by the second channel status information；P_CIndicate the transimission power of the first terminal equipment, h_CBIt indicates from first end End equipment to the network node channel gain and it indicated by first channel state information, γ_minIndicate for this The predefined threshold value of one terminal device, and it can be predefined SINR value in one embodiment, and N indicates to be somebody's turn to do Received noise power at network node.

In another embodiment, identified first transimission power is to communicate permitted maximum transmitted for the D2D Power.

In some embodiments, this method can further include: send identified use to the D2D set of communication devices In the resource allocation and first transimission power of D2D communication.

In one embodiment, this method can further include: obtain from the first terminal equipment and the network node Between cellular communication transmitter to the D2D communication equipment in the D2D set of communication devices channel third channel status Information, and for the D2D communication equipment D2D communicate channel the 4th channel state information；Based on identified first Transimission power, the third channel state information and the 4th channel state information determine that the D2D for the D2D communication equipment is logical The signal of letter and interference and noise power ratio SINR；And identified SINR is sent to the D2D communication equipment.

In the second aspect of the disclosure, a kind of method realized in terminal device is provided.This method includes from network Node receives the resource allocation for D2D the configuration communicated and communicating for D2D, the configuration instruction transimission power or signal and makes an uproar Sound and noise power ratio SINR；Based on it is received configuration come select for D2D communicate modulation and encoding scheme；And according to Resource allocation and selected modulation implement D2D communication with encoding scheme.

In one embodiment, it is described based on it is received configuration come select for D2D communicate modulation and encoding scheme Including at least one of the following: selecting the highest that can be supported by the configuration from predefined modulation and encoding scheme set Modulation and encoding scheme；And if indicated transimission power or SINR is lower than threshold value, it is predetermined that selection is not included in this Encoding scheme in the modulation and encoding scheme set of justice.

In another embodiment, this method can further include: send the first signal and second to the network node Signal, the channel state information of the channel of first signal designation from the transmitter of cellular communication to terminal device, and this Channel state information of the binary signal instruction for the D2D of the terminal device channel communicated.

In the third aspect of the disclosure, a kind of network node is provided.The network node includes: first acquisition unit, should First acquisition unit is configured as obtaining the network node and is in the first terminal carried out in cellular communication with the network node First channel state information of the channel between equipment, and from device-to-device D2D set of communication devices to the network node The second channel status information of the channel of the receiver of cellular communication is carried out between the first terminal equipment；Determination unit, should Determination unit be configured as combining based on first channel state information and the second channel status information determine for this The cellular communication of one terminal device and the resource allocation of D2D both and the first transimission power communicated for D2D, so that The performance of the cellular communication of the first terminal equipment is higher than predefined performance threshold；And first transmission unit, first hair Unit is sent to be configured as the resource allocation determined by sent to the first terminal equipment for cellular communication.

In the fourth aspect of the disclosure, a kind of terminal device is provided.The terminal device includes: receiving unit, the reception Unit is configured as receiving the resource allocation for D2D the configuration communicated and communicating for D2D, the configuration instruction from network node Transimission power or signal and noise and noise power ratio SINR；MCS selecting unit, the MCS selecting unit are configured as based on institute It is received to configure to select the modulation and encoding scheme that communicate for D2D；And D2D communication unit, the D2D communication unit are matched It is set to according to resource allocation and selected modulation and encoding scheme and implements D2D communication.

At the 5th aspect of the disclosure, a kind of network node is provided.The network node include at least one processor and At least one processor, at least one processor include computer program code；At least one processor and the computer Program code is configured as making the device at least execute the first aspect according to the disclosure together at least one processor Method.

At the 6th aspect of the disclosure, a kind of terminal device is provided.The terminal device include at least one processor and At least one processor, at least one processor include computer program code；At least one processor and the computer Program code is configured as making the device at least execute the second aspect according to the disclosure together at least one processor Method.

At the 7th aspect of the disclosure, a kind of device is provided, including for executing according to the first aspect of the disclosure The component of method.

In the eighth aspect of the disclosure, a kind of device is provided, including for executing according to the second aspect of the disclosure The component of method.

At the 9th aspect of the disclosure, provide including be stored thereon with program code at least one is computer-readable non- Transient memory medium, the program code by device when being executed, so that the device is executed according to the first aspect of the disclosure Method.

In the tenth aspect of the present invention, provide including be stored thereon with program code at least one is computer-readable non- Transient memory medium, the program code by device when being executed, so that the device is executed according to the second aspect of the disclosure Method.

According to various aspects as mentioned above and embodiment, it is possible to reduce from D2D communication to the negative shadow of cellular communication It rings.

Detailed description of the invention

By example, from the detailed description below with reference to attached drawing, the above and other side of the various embodiments of the disclosure Face, feature and benefit will be apparent, wherein identical appended drawing reference or letter are for indicating identical or equivalent element. Attached drawing is shown in more fully understanding embodiment of the disclosure, and the drawings are not necessarily drawn to scale, in the accompanying drawings:

Fig. 1 is shown in the exemplary wireless communication network 100 that embodiment of the disclosure wherein may be implemented；

Fig. 2 a- Fig. 2 b is schematically shown in cellular uplink scene and cellular downlink scene to D2D The interference of the communication/interference from D2D communication；

Fig. 3 a- Fig. 3 c shows the flow chart of the method according to an embodiment of the present disclosure realized at network node；

Fig. 4 shows the example of signaling flow according to an embodiment of the present disclosure；

The flow chart of Fig. 5 a- method that Figure 5b shows that according to an embodiment of the present disclosure to realize at terminal device；

Fig. 6 shows the mapping between signal and interference and noise power ratio (SINR) and modulation and encoding scheme (MCS) The example of relationship；

Fig. 7 shows showing for the device according to an embodiment of the present disclosure as network node/realize within network nodes Meaning property block diagram；

Fig. 8 shows showing for the device according to an embodiment of the present disclosure as terminal device/realize in terminal device Meaning property block diagram；And

Fig. 9 show the device that can be presented as network node/within network nodes and can be presented as terminal device/ The simplified block diagram of device 1120 in terminal device.

Specific embodiment

Hereinafter, the principle and spirit of the disclosure will be described with reference to an illustrative embodiment.It should be appreciated that all these realities Example is applied merely to those skilled in the art more fully understand and further practice the present invention and provide, rather than are used to limit The scope of the present invention.For example, as one embodiment a part and the feature that shows or describe can be with another embodiment It is used together to generate another embodiment.For the sake of clarity, all spies actually realized are not described in the present specification Sign.

It is described real to the reference instruction of " one embodiment ", " embodiment ", " example embodiment " etc. in specification Applying example may include specific feature, structure or characteristic, but each embodiment need not include specific feature, structure or spy Property.Moreover, these phrases are not necessarily referring to the same embodiment.In addition, specific feature, structure ought be described in conjunction with the embodiments Or when characteristic, it should propose, in conjunction with regardless of whether feature as the other embodiments influence being expressly recited, structure or characteristic exist Within the knowledge of those skilled in the art.

It will be appreciated that though term " first " and " second " etc. can be used herein to describe various elements, but this A little elements should not be limited by these terms.These terms are only used to distinguish an element and another element.For example, not taking off In the case where range from example embodiment, first element can be referred to as second element, and similarly, and second element can be with Referred to as first element.As it is used herein, term "and/or" includes any of one or more associated listed terms With all combinations.

Term as used herein is used only for the purpose of describing specific embodiments, it is no intended to limit example embodiment.Such as Used herein, singular " one ", "one" and "the" are also intended to including plural form, unless the context otherwise specifically It is bright.It will be further understood that, the terms "include", "comprise", " having ", " having ", " covering " and/or " containing ", make when herein Used time, the presence of the feature, element and/or component etc. is specified, but is not excluded for one or more other features, element, group The presence or addition of part and/or combination thereof.

In the following description and claims, unless otherwise defined, otherwise all technologies used herein and section are academic Language has meaning identical with the normally understood meaning of disclosure those of ordinary skill in the art.

As it is used herein, term " cordless communication network " refers to following the net of any suitable wireless communication standard Network, long term evolution (LTE), advanced LTE (LTE-A), wideband code division multiple access (WCDMA), high-speed packet access (HSPA) etc.. Furthermore, it is possible to according to it is any suitable respectively for communication protocol come execute network node in cordless communication network and terminal device it Between communication, including but not limited to the first generation (1G), the second generation (2G), 2.5G, 2.75G, the third generation (3G), forth generation (4G), 4.5G, the 5th following generation (5G) communication protocol, and/or any other currently known or exploitation in the future agreement.

As it is used herein, term " network node " refers to the node in cordless communication network, terminal device via The node access networks network and/or from wherein receive control or service.Network node also refers to base station (BS) or access point Such as node B (NodeB or NB), evolved NodeB (eNodeB or eNB), remote radio unit (RRU), radio (AP), Head (RH), long distance wireless dateline (RRH), relaying, such as femto, pico- low power nodes etc..

Term " terminal device " refers to set with access to wireless communication network and from any terminal for wherein receiving service It is standby.As an example, not a limit, terminal device can be user equipment (UE), can be subscriber station (SS), portable subscriber It stands, movement station (MS) or access terminal (AT).Terminal device can include but is not limited to mobile phone, cellular phone, intelligent hand Machine, tablet computer, wearable device, personal digital assistant (PDA), portable computer, such as digital camera image capture Terminal device, gaming terminal device, music storage and playback apparatus, wearable terminal equipment, vehicle-mounted wireless terminal device etc..

In the following description, term " terminal device ", " terminal ", " user equipment " and " UE " may be used interchangeably.

Fig. 1 is shown in the exemplary wireless communication network 100 that embodiment of the disclosure wherein may be implemented.Institute as shown in figure 1 Show, cordless communication network 100 may include one or more network nodes, such as network node 101, can be the shape of eNB Formula.It should be appreciated that network node 101 is also possible to node B, BTS (base transceiver station) and/or BSS (base station sub-system), connects The form of access point (AP) etc..Network node 101 to multiple terminal devices for example in its coverage area honeycomb UE (in Fig. 1 and Hereafter it is also indicated as CUE) 102-105 offer wireless connection.Cordless communication network 100 can also include being able to carry out D2D to lead to One or more terminal devices of letter, such as D2D communication equipment (are also indicated as DUE in Fig. 1, and are hereinafter claimed For the D2D equipment of DUE) 106-109.D2D communication makes it possible to including D2D transmitter (Tx) and corresponding D2D receiver (Rx) direct communication is carried out between D2D pairs.D2D communication between DUE in Fig. 1 can be used for improving cordless communication network 100 The level of resources utilization, and improve user experience by improving user throughput and extending the battery life of user equipment.

As an example, cordless communication network 100 can be 4G LTE network.In this example, from eNB 101 (Tx) to The downlink (DL) of CUE (Rx) such as (CUE 102 and 103) transmits, multiple via orthogonal frequency division multiple access (OFDMA) frame multichannel With, and uplink (UL) transmission from CUE (Tx) (such as CUE 104) to eNB 101 (Rx) is more using single carrier frequency division Location (SC-FDMA) technology.

In the lte networks, system bandwidth can be divided into multiple resource blocks (RB), and each downlink/uplink Link transmission or D2D communication can be assigned one or more RB.If the resource that D2D user occupancy is not occupied by CUE, it CUE will not be caused to interfere, and the interference from CUE will not be undergone.On the other hand, if D2D user's use and CUE phase Same resource, then they may cause interference/experience from the interference of CUE to CUE.Example interference signal is shown in Fig. 1 111-114。

In Fig. 2 a- Fig. 2 b, needle is shown for DL transmitting scene and UL transmitting scene respectively for wireless system 200 Right/potential interference from D2D communication equipment.As shown in Figure 2 a, during the DL period, it will be seen that two kinds of interference, One of them is from D2D transmitter (for example, DUE 203 or 206 in Fig. 2 a) to from network node (for example, eNB 201) interference of received honeycomb UE (for example, CUE 202), another kind therein are from network node to D2D receiver (example Such as, DUE 204 or 205) interference.Since the maximum transmission power of eNB is greater than the maximum transmission power of D2D transmitter, In some embodiments, the interference from D2D transmitter to CUE may only result in inappreciable performance loss, still, if For D2D transmitter very close to CUE, then interfering may be very important.As shown in figure 2b, during the UL period, in same RB D2D to and coexisting for CUE also cause two kinds of interference.One is from D2D transmitter (for example, DUE203 in Fig. 2 a or 206) to from the interference of CUE (for example, CUE 202) received eNB, and another kind is (such as the DUE from CUE to DUE 204 or interference 205).It is all these to interfere the overall system performance that all degrade.Therefore, interference management from D2D in communicating Key effect is played in terms of obtaining profit potential, and if interference cannot control well, whole system capacity and effect Rate possibly even degrades.

In order to reduce interference, various schemes, including power control, adaptive scheduling and cross-layer optimizing can be used.Dividing In the traditional solution that don't bother about reason power control and resource allocation, it may be difficult to optimize decision in the side eNB.In addition, big Most traditional solutions fail the performance for considering CUE and DUE simultaneously.

It is at least partly above-mentioned in order to solve the problems, such as, method, apparatus and computer program have been proposed herein.Utilize this public affairs The some embodiments opened can guarantee normal honeycomb UE communication by jointly controlling resource allocation and the transimission power of DUE Performance.Using some other embodiments, the power of D2D equipment can be minimized under conditions of ensuring normal cellular communications.

It should be appreciated that embodiment of the disclosure is not limited to exemplary wireless communication network shown in Fig. 1 or Fig. 2 a and Fig. 2 b 100 or 200, but any application scenarios there are similar problems can be more broadly used for.

Referring now to Fig. 3 a- Fig. 3 c, it illustrates cordless communication networks (for example, cordless communication network shown in Fig. 1 100) flow chart of the method 300 in.In one embodiment, method 300 can be as network node (for example, shown in Fig. 1 Network node 201 shown in network node 101 or Fig. 2 a- Fig. 2 b) it realizes.

As illustrated in figure 3a, method 300 includes acquisition network node (for example, eNB 101 in Fig. 1) at frame 310 With the letter between the first terminal equipment (for example, CUE 105 shown in Fig. 1) carried out with network node in cellular communication First channel state information in road, and from D2D set of communication devices (for example, DUE 106-109 shown in Fig. 1) to network The second channel status information of the channel of the receiver of cellular communication between node and first terminal equipment.It is appreciated that bee The receiver of nest communication is for the first terminal equipment of downlink communication and for the eNB of uplink communication.In frame 320 Place, network node is combined based on the first channel state information and second channel status information to be determined for first terminal equipment The resource allocation of cellular communication and D2D both and the first transimission power for D2D communication, so that first terminal equipment Cellular communication performance be higher than predefined performance threshold.At frame 330, network node sends institute really to first terminal equipment The fixed resource allocation for cellular communication.

Using method 300, can be determined by joint for first terminal equipment and the resource allocation of D2D both with And guarantee the normal cellular of first terminal equipment (for example, CUE 105 shown in Fig. 1) for the transimission power of D2D communication Communication.

It is appreciated that first terminal equipment can be any cellular communication apparatus in cordless communication network, and method 300 can be applied to determine the resource allocation for being used for more than one honeycomb UE.Assuming that N number of honeycomb UE in cell is served in base station With M UE, then honeycomb UE set can be represented as C={ 1,2 ..., N }, and D2D set of communication devices can be expressed For D={ 1,2 ..., M }.In one embodiment, it can be set with reference to Fig. 3 a and method 300 the first terminal equipment described Any CUE (for example, i-th of terminal device in set C) in C, and method 300 can be executed to determine for set C In all or some UE resource allocation.In another embodiment, the D2D set of communication devices described with reference to method 300 It can be set D or its subset.In some cases, the number of DUE can be greater than the number of CUE, for example, M > > N.

In one embodiment, at frame 310, network node can be by receiving channel status letter from first terminal equipment Breath report is to obtain the first channel state information and second channel status information.For example, in down link period, first terminal Equipment can measure pilot signal (or the reference signal of network node and D2D transmitter in D2D set of communication devices (RS)) it, assesses the channel state information of respective channels and is reported to network node via uplink.

In another embodiment, at frame 310, network node can by during uplink period in network section Pilot signal (or the reference signal of D2D transmitter of the point side measurement in first terminal equipment and D2D set of communication devices (RS)) the first channel state information and second channel status information are obtained.It is appreciated that in some embodiments, network section Point can obtain the first channel state information by measuring the data transmission from first terminal equipment, and/or pass through measurement The lead code of D2D communication equipment in D2D set of communication devices finds signal to obtain second channel status information.It is real It applies example and is not limited to any ad hoc fashion that network node obtains the first channel state information and second channel status information.

Although in some embodiments being described below, the first channel state information and second channel status information are taken can To be represented as the exemplary forms of the channel response of H, it will be appreciated that embodiment is without being limited thereto.For example, in some embodiments In, the first channel state information and/or second channel status information can be appointing for the channel status that can indicate respective channels What is indicated.For example, channel state information can be but not limited to path loss, channel response or distance.In some other implementations In example, the first channel state information and/or second channel status information can be the finger of the interference level undergone in respective channels Show.

In one embodiment, at frame 320, network node can determine under the conditions of at least one of the following conditions Resource allocation and the first transimission power:

The overall transmission power that D2D for D2D set of communication devices is communicated is minimized,

Physical Resource Block is assigned in the not more than terminal device carried out in cellular communication with network node, And

Physical Resource Block is assigned to not more than one D2D pairs for D2D communication.

First condition is conducive to the power consumption of D2D equipment being maintained at minimum level, and other two conditions can promote Simplified calculating, and to reduce the computation complexity in network side.

As shown in figure 3b, in one embodiment, at frame 320, network node can pass through following sub- frame 3201- 3203 determine the transimission power for D2D communication.

At sub- frame 3201, network node can at least be based on the first channel state information, second channel status information and Adjustable transimission power P for D2D communication_D, to calculate for the cellular communication between first terminal equipment and network node Signal and interference and noise power ratio (SINR) set.For example, it is assumed that first terminal equipment is i-th of end in CUE set Following equation (1) can be used then to calculate the DL SINR for i-th of CUE (that is, first terminal equipment) in end equipment:

Wherein P_BIndicate the transmission power of eNB；Indicate the transmitting of j-th of D2D transmitter in D2D cluster tool Power；It is the channel gain (or channel response) between eNB and i-th of CUE (that is, first terminal equipment), and it can By being indicated at frame 310 by first channel state information of network node (for example, eNB 101 in Fig. 1) acquisition； Indicate the channel gain from j-th of D2D transmitter to i-th of CUE；N indicates the received noise power at CUE, in some realities Additive white Gaussian noise (AWGN) can be assumed to be by applying its in example；And x_i,jIndicate j-th of D2D transmitter and i-th of CUE Whether identical (one or more) resource block is shared, and if identical (one or more) RB is assigned to them, x_i,j=1, otherwise x_i,j=0.ForEach candidate value, network node can obtain the value for SINROne In a embodiment, network node can be directed toEach candidate value and x_i,jEach candidate value calculate SINR value In another embodiment, network node can determine x first_i,jValue, be then based onEach candidate value and determine X_i,jTo calculate SINR value

At sub- frame 3202, network node can be from calculated SINRIt is selected above in set predefined The minimum SINR of performance threshold.Only as an example, in one embodiment, predefined performance threshold, which can be, can guarantee The SINR threshold value of the performance requirement of i UE (that is, first terminal equipment).In another embodiment, predefined performance threshold It can be the SINR threshold value that can guarantee the minimum cellular communication of first terminal equipment.

Alternatively, in some embodiments, predefined performance threshold can be about the bit error rate (BER), Block Error Rate (BLER), handling capacity or the threshold value of data rate.

At sub- frame 3203, network node can will be used for D2D communication the first transimission power be determined as with it is selected The corresponding transimission power of minimum SINR.

As another example, in one embodiment, at frame 320, network node can the item shown in equation (2) Resource allocation and the first transimission power are determined under part (constraint):

Wherein,Indicate the predefined performance threshold for being used for first terminal equipment, it in one embodiment can be with It is predefined SINR value.

In one embodiment, at frame 320, network node can be excellent shown in following equation (2a) by solving Change problem executes determination:

It can be based on being directed to shown in above equation (2) and equation (1)Definition obtain equation (2a). In equation (2a),Indicate the transmission power of j-th of D2D communication equipment in D2D set of communication devices；In a reality It applies in example, because i-th of CUE is only considered as first terminal equipment by us, then for simplicity, index i can be omitted； In this case, if resource block identical with first terminal equipment, x is assigned in j-th of D2D communication equipment_j=1, Otherwise x_j=0；N is the number of the terminal device in D2D set of communication devices；Indicate the from D2D set of communication devices J D2D transmitter is to the channel gain of first terminal equipment, and it is indicated by second channel status information；P_BIndicate net The transimission power of network node；h_BCIt indicates from network node to the channel gain of first terminal equipment, and it is by the first channel shape State information indicates, γ_minIndicate the predefined performance threshold (for example, SINR threshold value) for being used for first terminal equipment, and N Indicate the received noise power at first terminal equipment.

In this embodiment, it ensure that the reasonable of first terminal equipment in the determination that frame 320 executes by network node DL communication performance.

In order to solve this problem of above-mentioned low complex degree, equation can be summarised as the problem of changing money, this is that knapsack is asked One of modification of topic.For example, the minimum emissive power that network node can preset each D2D transmitter (is represented as ), then allowAnd C=(P_Bh_BC)/γ_minThen-N can obtain the following equation (2b) for optimization:

This problem of changing money is changed for Flat Amount, and change number is minimized.The unit of each change is used w_jIt indicates, and total amount is C.The problem of changing money can easily be asked by various methods well known by persons skilled in the art Solution, such as dynamic programming algorithm, greedy method, corresponding specific principle and realization can be found in corresponding bibliography, And embodiment of the disclosure is not limited to use in any ad hoc approach of the equation (2b) of solution formula, therefore herein will Omissions of detail.

After solving equation, if x_jEqual to 1, then DUE will use preset minimum power to send data at this RB, if x_jEqual to 0, then DUE will not send data at this RB, therefore by minimizing x_jSummation, the overall transmission power of DUEIt will be minimized.

Alternatively or additionally, in another embodiment, the UL of first terminal equipment can be communicated and executes optimization. For uplink, equation (3) can be used to calculate the SINR at network node, such as:

Wherein,Indicate the transmission power of j-th of D2D transmitter in D2D set of communication devices；If j-th D2D communication equipment be assigned with first terminal equipment (be in this example the identical resource block of i-th of CUE), then x_i,j=1, Otherwise x_i,j=0；N is the number of the terminal device in D2D set of communication devices,It indicates from j-th of D2D transmitter to network The channel gain of node, and it is indicated by second channel status information；Indicate the transimission power of first terminal equipment,It indicates the channel gain from first terminal equipment to network node and it is indicated by the first channel state information, and N indicates the received noise power at network node.

As an example, it is similar to above with reference to described in DL communication, network node can be shown in equation (4) The following conditions under be determined at frame 320, to guarantee the acceptable performance of the UL for first terminal equipment:

In one embodiment, at frame 320, network node can be excellent shown in following equation (4a) by solving Change problem executes determination:

Wherein, if resource block identical with first terminal equipment, x is assigned in j-th of D2D communication equipment_j=1, Otherwise x_j=0；P_CIndicate the transimission power of first terminal equipment, h_CBIndicate that the channel from first terminal equipment to network node increases Benefit, and it is indicated by the first channel state information, and γ_minIndicate the predefined threshold value for being used for first terminal equipment.

Similar to the realization of DL scene, at frame 320, network node can simplify problem, i.e. equation (4b) by solving Shown in change money problem to determine resource allocation and the first transimission power:

Equation (4b) has with equation (2b) identical form, the difference is thatAnd

In one embodiment, at the frame 320 determined by the first transimission power be to communicate permitted maximum for D2D Transimission power.That is, D2D equipment can only be sent with the power for being equal to or less than the first transimission power.

As illustrated in figure 3 c, in another embodiment, method 300 may further include frame 340, wherein network node The identified resource allocation and the first transimission power communicated for D2D is sent to D2D set of communication devices.Always do not need frame 340.If D2D set of communication devices may not send resource allocation and first to them and pass currently without D2D business, network Defeated power.In another embodiment, network node is readily modified as indicating determining modulation and encoding scheme to DUE.

Alternately, or additionally, in one embodiment, method 300 may include frame 350-370.At frame 350, network Node obtains the transmitter from the cellular communication between first terminal equipment and network node into D2D set of communication devices The third channel state information of the channel of D2D communication equipment, and for D2D communication equipment D2D communicate channel the 4th Channel state information.In one embodiment, network node can obtain the from DUE (for example, DUE 109 shown in Fig. 1) Three channel state informations and/or the 4th channel state information.For example, DUE can be measured from network node (DL) or first eventually The cellular transmission (for example, pilot tone, RS) of end equipment (UL), and using the channel gain of estimation as third channel status information reports To network node.In another embodiment, network node can obtain third channel shape by signal of the measurement from DUE State information.DUE can also measure D2D link and using it as the 4th channel status information reports to network node.

At frame 360, what network node can be obtained based on the first transimission power determined at frame 320, at frame 350 Third channel state information and the 4th channel state information determine the SINR that the D2D for DUE is communicated.In one embodiment, It can be calculated such as equation (5) for the SINR of DUE:

Wherein P_BIndicate the transmission power of network node,Indicate j-th of D2D transmitter (that is, calculating for it The DUE of SINR) transmission power,It is the channel power gain between eNB and DUE,Indicate the letter for D2D communication Road gain, N indicate the received noise power in the side DUE；And x_jWhether instruction D2D link j reuses honeycomb DL resource, if Both DUE j and cellular communication use identical RB, then x_j=1, otherwise x_j=0.In equation (5), the transmission quilt from eNB It is considered the interference to DUE.

It alternatively, in another embodiment, can be by considering that the uplink from one or more honeycomb UE passes Defeated interference calculates the SINR for DUE using equation (6):

Wherein,Indicate the transmission power of i CUE,It is the channel power gain between i-th honeycomb UE and DUE,Indicate that the channel gain for D2D communication, N indicate the received noise power in the side DUE；And x_i,jIndicate D2D link j Whether the UL resource of i-th CUE is reused, if using identical RB, x_j=1, otherwise x_j=0.In equation (6), one is come from The UL transmission of a or multiple CUE is considered as the interference to DUE.

At frame 370, network node can be sent in D2D communication equipment at frame 360 determined by SINR.

Referring now to Figure 4, it illustrates the examples of signaling flow according to an embodiment of the present disclosure.As shown in Figure 4, under In line link, such as in the pilot time slot of special subframe, eNB, which sends the pilot tone that can be measured by both CUE and D2D equipment, to be believed Number (as shown in 401-403).UE can based on estimate from the received downlink pilot signal of eNB themselves and eNB it Between path loss or channel response (as shown in 404 and 405).For example, UE can be with the received signal strength of measurement pilot signals. In one embodiment, pilot signal can be sent back eNB using uplink pilot time slot at 406 and 407 by UE.? At 408, eNB can based on received pilot signal (for example, intensity of pilot signal) measure its own between UE Channel gain.D2D receiver (Rx) can also by listen to respectively by CUE and D2D Tx send uplink pilot, The gain between the channel gain and their own and D2D transmitter (Tx) between their own and CUE is measured at 409. At 410, D2D equipment (for example, D2D receiver) can report the channel gain communicated for D2D to eNB.Obtaining, sense is emerging After the channel gain of interesting channel, at 411, for example, eNB can be determined and be set for D2D as with reference to described in method 300 Standby resource allocation CUE and DUE and transimission power.In one embodiment, eNB can be sent at 412 to CUE calculated Resource allocation information.In another embodiment, calculated SINR and resource allocation can also be sent to by eNB at 413 DUE (for example, D2D receiver or D2D transmitter or both).It, can be 414 based on indicated resource allocation and transimission power Place executes data by CUE and DUE and transmits/receives.For example, CUE can start UL transmission on particular time-slot and the RB distributed Process, and DUE can use indicated certain power and send to its peer-to-peer of D2D centering.

Referring now to Fig. 5 a- Fig. 5 b, it illustrates (be also referred to as DUE, such as the DUE of Fig. 1 below in D2D terminal device 108 or 109) place realize method 500 flow chart.As illustrated in fig. 5 a, method 500 includes frame 510, and wherein DUE is from network Node receives the configuration for D2D communication and the resource allocation for D2D communication, the configuration instruction transimission power or SINR.? In one embodiment, it is for DUE that indicated transimission power, which is for the permitted maximum transmission power of DUE and/or SINR, Maximum SINR.At frame 520, DUE based on it is received configuration come select for D2D communicate modulation and encoding scheme (MCS)；And at frame 530, DUE implements D2D communication according to resource allocation and selected MCS.

In one embodiment, as illustrated in fig. 5b, at frame 520, DUE can be at frame 5201 from predefined modulation Can be by highest modulation and encoding scheme that configuration is supported with selection in encoding scheme set, and/or if referred at 5202 The transimission power or SINR shown are lower than threshold value, then selection is not included in the coding in predefined modulation and encoding scheme set Scheme.This makes it possible to carry out automatic adaptive modulation and coding in the side DUE based on indicated transimission power or SINR (AMC).AMC is one of the most important technology for improving power system capacity, and it is a kind of channel-aware skill for adapting to modulation Art.In conventional cellular systems, eNB can adjust modulation and encoding scheme (MCS) according to channel condition, which can It is returned with for example being reported via channel quality indicator (CQI) by user report.Using embodiment of the disclosure, can based on by Transimission power indicated by eNB and/or SINR are in the side DUE execution AMC.

For example, DUE can by received SINR be used as its D2D communication target SINR, to select modulation scheme And encoding rate.The example of predefined MCS set is shown in Fig. 6, and each MCS corresponds to specific SINR value.D2D pairs Transmitter can select encoding rate and modulation scheme for the RB that is distributed, for example, it can choose can be by indicated mesh Mark maximized MCS and coding that SINR is supported, it is therefore an objective to ensure the normal communication of CUE and D2D pairs.

In one embodiment, if indicated SINR is lower than threshold value, such as SINR gathers corresponding to predefined MCS In minimum MCS, then DUE can be used predefined specific coding scheme for its D2D communicate.Predefined specific coding side Case can be the encoding scheme being not included in predefined modulation and encoding scheme set.For example, if received from eNB SINR is lower than -5.1dB (the minimum MCS corresponding to QPSK+1/8 encoding rate), then cannot use in predefined MCS set MCS, and in this case, at frame 5202, DUE can return back to predefined encoding scheme.Predefined special volume The data rate that code scheme provides is lower than the data rate supported by the minimum MCS that predefined MCS gathers.Although the disclosure Embodiment be not limited to any specific predefined encoding scheme, but as an example, it can be repeated encoding scheme. Repeated encoding scheme repeats source bit before the coding, and repeats that redundancy can be further increased to compensate declining for wireless channel It falls.For this purpose, DUE can pre-define specific recurring rule.In one embodiment, D2D transmitter can determine and make With repeated encoding scheme, and notified by signaling to corresponding D2D receiver before D2D data communication starts.

Optionally, in one embodiment, method 500 can further include frame 540, and wherein DUE is sent out to network node Send the first signal and the second signal, the first signal designation is from the transmitter of cellular communication (for the eNB of DL or for UL's CUE) to the channel state information of the channel of terminal device, and second signal instruction is used for the letter that the D2D of terminal device is communicated The channel state information in road.In one embodiment, the first signal and the second signal can be at the frame 360 of method 300 to eNB It provides by the eNB third channel state information used and the 4th channel state information.

Referring now to Figure 7, it illustrates in cordless communication network (for example, cordless communication network 100 shown in Fig. 1) The schematic block diagram of device 700.The device may be implemented as network node/within network nodes, for example, shown in Fig. 1 eNB 101.Device 700 can be operated to execute exemplary method 300 and any other possible mistake with reference to Fig. 3 a- Fig. 3 c description Journey or method.It should also be understood that method 300 is not necessarily executed by device 700.At least some steps of method 300 can be by one Or other multiple entities execute.

As illustrated in fig. 7, device 700 includes first acquisition unit 701, is configured as obtaining network node (for example, figure 1 eNB 101) in network node carry out cellular communication in first terminal equipment (for example, CUE 105 of Fig. 1) it Between channel the first channel state information, and from device-to-device D2D set of communication devices (for example, the DUE 106- of Fig. 1 109) to the second channel state letter of the channel between the receiver of the cellular communication between network node and first terminal equipment Breath；Determination unit 702 is configured as determining based on the first channel state information and second channel status information joint for first The cellular communication of terminal device and the resource allocation of D2D both and the first transimission power communicated for D2D, so that the The performance of the cellular communication of one terminal device is higher than predefined performance threshold；And first transmission unit 703, be configured as to First terminal equipment sends the identified resource allocation for being used for cellular communication.

In one embodiment, unit 701,702 and 703 can be configured as the frame 310,320 for executing method 300 respectively Therefore operation with 330 is also applied for herein with reference to the description as described in frame 310-330 that method 300 and Fig. 3 a- Fig. 3 c provide, And it will not be repeated again details.Similarly, the first channel state information about the offer of reference method 300, second channel state The description of information and predefined performance threshold also can be applied in some embodiments herein, therefore will not be repeated again details.

Described in frame 320 similar to reference method 300, determination unit 702 be can be configured as in the following conditions At least one under the conditions of execute determination: for D2D set of communication devices D2D communicate overall transmission power be minimized, object Reason resource block is assigned in not more than a terminal device and the physical resource carried out in cellular communication with network node Block is assigned to not more than one D2D pairs for D2D communication.One example of applied condition can in equation (2) or (4) it is found in.

In another embodiment, determination unit 702 may include computing unit 7021, be configured as based at least first Channel state information, second channel status information and the adjustable transimission power for D2D communication, calculating are set for first terminal The signal of the standby cellular communication between network node and the set of interference and noise power ratio SINR；SINR selecting unit 7022, be configured as from the minimum SINR of predefined performance threshold is selected above in calculated SINR set；And function Rate determination unit 7023, the first transimission power for being configured as to be used for D2D communication are determined as and selected minimum SINR phase Corresponding transimission power.

Alternatively, in another embodiment, determination unit 702 can be configured as by solve equation (2a), (2b), Optimization problem shown in (4a) or (4b) determines resource allocation and the first transimission power.

In one embodiment, the first transimission power that determination unit 702 determines is to communicate permitted maximum for D2D Transimission power.

Optionally, in another embodiment, device 700 can further include: the second transmission unit 704 is configured To send the identified resource allocation and the first transimission power communicated for D2D to D2D set of communication devices.

Alternately, or additionally, In yet another embodiment, device 700 may include second acquisition unit 705, be configured To obtain from the transmitter of the cellular communication between first terminal equipment and network node to the D2D in D2D set of communication devices The third channel state information of the channel of communication equipment, and for D2D communication equipment D2D communicate channel the 4th channel Status information；SINR determination unit 706, be configured as based on identified first transimission power, third channel state information and 4th channel state information come determine for D2D communication equipment D2D communication signal and interference and noise power ratio SINR；With And third transmission unit 707, it is configured as sending identified SINR to D2D communication equipment.

Fig. 8 shows the schematic block diagram of device 800.Device 800 may be implemented as terminal device/in terminal device In, such as D2D terminal device 108 or 109 shown in Fig. 1.Device 800 can be operated to execute and be retouched with reference to Fig. 5 a- Fig. 5 b The exemplary method 500 and any other possible process or method stated.It should be appreciated that method 500 is not necessarily held by device 800 Row.At least some steps of method 500 can be executed by other one or more entities.

Particularly, as illustrated in fig. 8, device 800 include receiving unit 801, be configured as from network node (for example, ENB 101 shown in Fig. 1) configuration for D2D communication and the resource allocation for D2D communication are received, which passes Defeated power or signal and noise and noise power ratio SINR；MCS selecting unit 802 is configured as based on a received configuration To select the modulation and encoding scheme that communicate for D2D；And D2D communication unit 803, it is configured as according to resource allocation and institute The modulation of selection and encoding scheme implement D2D communication.

In some embodiments, device 800 can be operated to execute the exemplary method 500 with reference to described in Fig. 5 a- Fig. 5 b, Therefore, the associated description with reference to provided by method 500 is also applied for this.

In one embodiment, MCS selecting unit 802 can be configured as through at least one of the following and select MCS: can be modulated from predefined modulation with selection in encoding scheme set by the highest that the configuration is supported and encoding scheme；With And if indicated transimission power or SINR is lower than threshold value, selection is not included in predefined modulation and encoding scheme collection Encoding scheme in conjunction.

As shown in Figure 8, in some embodiments, device 800 can further include feedback unit 804, be configured as The first signal and the second signal are sent to network node, the first signal designation is from the transmitter of cellular communication (for example, institute in Fig. 1 The CUE 105 or eNB 101 shown) to terminal device channel channel state information, and second signal instruction be used for terminal The channel state information of the channel of the D2D communication of equipment.

Fig. 9 show can embody within network nodes/as network node (for example, eNB 101 shown in Fig. 1) Device 910, and terminal device can be embodied in terminal device/is used as (for example, D2D terminal device 106- shown in Fig. 1 One of 109) simplified block diagram of device 920.

Device 910 may include at least one processor 911 of such as data processor (DP) etc and be coupled to processing At least one processor (MEM) 912 of device 911.Device 910 can further include the transmitter TX for being coupled to processor 911 With receiver RX 913.MEM 912 can be non-transient machine readable memory medium, and it can store program (PROG) 914.PROG 914 may include instruction, be performed when on associated processor 911, enable 910 basis of device Embodiment of the disclosure is operated, such as to execute method 300.At least one processor 911 is at least one MEM's 912 Combination can form the processing unit 915 for the various embodiments (such as method 300) for being adapted for carrying out the disclosure.

Device 920 includes at least one processor 921 of such as DP etc, and is coupled at least the one of processor 921 A MEM 922.Device 920 can further include the suitable TX/RX 923 for being coupled to processor 921.MEM 922 can be Non-transient machine readable memory medium and it can store PROG 924.PROG 924 may include instruction, when in correlation It is performed on the processor 921 of connection, device 920 is operated in accordance with an embodiment of the present disclosure, such as to execute Method 500.The combination of at least one processor 921 and at least one MEM 922, which can be formed, is adapted for carrying out the various of the disclosure The processing unit 925 of embodiment (such as method 500).

The various embodiments of the disclosure can by can by one or more of processor 911 and 921 can be performed meter Calculation machine program, software, firmware, hardware or combinations thereof are realized.

As non-limiting example, MEM 912 and 922 can be suitable for any type of local technical environment, and The memory terminal equipment, magnetic memory that any suitable data storage technology can be used to realize, such as based on semiconductor Terminal device and system, optical memory terminal device and system, fixed memory and removable memory.

As non-limiting example, processor 911 and 921 can be suitable for any type of local technical environment, and It and may include general purpose computer, special purpose computer, microprocessor, digital signal processor DSP and based on multi-core processor frame One or more of processor of structure.

Although some in above description are carried out in the context for operating in the wireless system in unlicensed band, But it should not be constructed as limiting spirit and scope of the present disclosure.The principle and concept of the disclosure can be more generally applicable in In other wireless systems.

In addition, the disclosure can also provide the memory comprising computer program as mentioned above comprising machine can Read medium and machine readable transmission medium.Machine readable media is also referred to as computer-readable medium, and may include Machine-readable storage medium, for example, disk, tape, CD, phase transition storage or such as random access memory (RAM), read-only depositing The electronic memory terminal device of reservoir (ROM), flash memory device, CD-ROM, DVD, Blu-ray disc etc..Machine readable transmission medium Carrier can be referred to as, and may include the transmitting signal of such as electricity, light, radio, acoustics or other forms --- such as Carrier wave, infrared signal etc..

Techniques described herein can be realized by various means, so that realizing the corresponding dress using embodiment description The device for the one or more functions set not only includes prior art component, but also including describing for realizing using embodiment Corresponding intrument one or more functions component, and it may include the separate part for each independent function, or Person can be configured as the component for executing two or more functions.For example, these technologies can be with hardware (one or more dress Set), firmware (one or more devices), software (one or more modules) or combinations thereof realizes.It, can for firmware or software To be realized by the module (for example, process, function etc.) for executing functionality described herein.

The example embodiment of this paper is described by reference to the block diagram of method and apparatus and flow chart diagram above.It will reason The combination of solution, each frame and block diagram and the frame in flow chart diagram of block diagram and flow chart diagram can be respectively by including meter The various parts of calculation machine program instruction are realized.These computer program instructions can be loaded into general purpose computer, dedicated meter To generate machine on calculation machine or other programmable data processing units, so that in computer or other programmable data processing units The instruction of upper execution creates for realizing the component for the function of specifying in one or more flow chart box.

In addition, this is not construed as requiring specific suitable shown in although depicting operation with particular order Sequence executes these operations in order, or executes all operations shown, to realize desired result.In some cases, Multitasking and parallel processing may be advantageous.Similarly, although it is thin comprising several specific implementations in above discussion Section, but these are not necessarily to be construed as the limitation to the range of subject matter described herein, but as can be to specific reality Apply be for example specific feature description.The certain features described in the present specification in the context of separate embodiments Realization can be combined in a single embodiment.On the contrary, the various features described in the context of single embodiment can also be single Solely or with any suitable sub-portfolio realize in various embodiments.In addition, although feature above can be described as with Certain combinations are worked and even initially claimed protect in this way, can still cut off from combination in some cases comes from institute Claimed combined one or more features, and combination claimed can be for the change of sub-portfolio or sub-portfolio Type.

It will be apparent to one skilled in the art that with advances in technology, present inventive concept can be with various sides Formula is realized.It provides above-described embodiment and is used to describe rather than limit the disclosure, and it is to be understood that not departing from this field In the case where the readily comprehensible spirit and scope of the present disclosure of technical staff, modifications and variations can be used.These modifications and change Type is considered as in the scope of the disclosure and the accompanying claims.The protection scope of the disclosure is defined by the following claims.

Claims

1. a kind of method realized at network node, comprising:

It obtains the network node and carries out the letter between the first terminal equipment in cellular communication in the network node First channel state information in road, and from device-to-device D2D set of communication devices to the network node and described first The second channel status information of the channel of the receiver of the cellular communication between terminal device；

Combined based on first channel state information and the second channel status information and is determined for the first terminal The resource allocation of the cellular communication of equipment and the D2D both and the first transmission function for D2D communication Rate, so that the performance of the cellular communication of the first terminal equipment is higher than predefined performance threshold；And

The identified resource allocation for being used for the cellular communication is sent to the first terminal equipment.

2. according to the method described in claim 1, wherein the determination is performed under the conditions of at least one of the following conditions:

The overall transmission power that the D2D for the D2D set of communication devices is communicated is minimized,

Physical Resource Block is assigned to the not more than terminal for being in and being carried out in the cellular communication with the network node and sets It is standby, and

3. according to the method described in claim 1, wherein the determination includes:

At least based on first channel state information, the second channel status information and for the adjustable of D2D communication Transimission power is saved, the signal for the cellular communication between the first terminal equipment and the network node is calculated and is done It disturbs and gathers with noise power ratio SINR；And

From the minimum SINR of the predefined performance threshold is selected above in calculated SINR set；And

First transimission power for being used for the D2D communication is determined as transmission function corresponding with selected minimum SINR Rate.

4. according to the method described in claim 1, wherein the determination includes: to determine the resource by solving optimization problem Distribution and first transimission power:

x_j=0,1

WhereinIndicate the transmission power for j-th of D2D transmitter in the D2D set of communication devices；If the jth Resource block identical with the first terminal equipment is assigned in a D2D transmitter, then x_j=1, otherwise x_j=0；N is the D2D The number of terminal device in set of communication devices；Indicate j-th of D2D hair from the D2D set of communication devices Machine is penetrated to the channel gain of the first terminal equipment, and it is indicated by the second channel status information；P_BIndicate institute State the transimission power of network node；h_BCIt indicates from the network node to the channel gain of the first terminal equipment, and its It is indicated by first channel state information, γ_minIndicate the predefined performance threshold for being used for the first terminal equipment Value, and N indicates the received noise power at the first terminal equipment.

5. according to the method described in claim 1, wherein the determination includes: to determine the resource by solving optimization problem Distribution and first transimission power:

x_j=0,1

WhereinIndicate the transmission power for j-th of D2D transmitter in the D2D set of communication devices；If the jth Resource block identical with the first terminal equipment is assigned in a D2D transmitter, then x_j=1, otherwise x_j=0；N is the D2D The number of terminal device in set of communication devices；Indicate the letter from j-th of D2D transmitter to the network node Road gain, and it is indicated by the second channel status information；P_CIndicate the transimission power of the first terminal equipment, h_CB Indicate channel gain from the first terminal equipment to the network node and its by first channel state information Lai Instruction, γ_minIndicate the predefined threshold value for being used for the first terminal equipment, and N is indicated at the network node Received noise power.

6. the method according to any one of claims 1 to 5, wherein identified first transimission power is for described D2D communicates permitted maximum transmission power.

7. the method according to any one of claims 1 to 5 further comprises:

The identified resource allocation communicated for the D2D and first transmission are sent to the D2D set of communication devices Power.

8. the method according to any one of claims 1 to 5 further comprises:

It obtains from the transmitter of the cellular communication between the first terminal equipment and the network node to the D2D and leads to Believe the third channel state information of the channel of the D2D communication equipment in cluster tool, and the institute for the D2D communication equipment State the 4th channel state information of the channel of D2D communication；

Based on identified first transimission power, the third channel state information and the 4th channel state information, determine The signal and interference and noise power ratio SINR that the D2D for the D2D communication equipment is communicated；And

Identified SINR is sent to the D2D communication equipment.

9. a kind of method that the terminal device in the device-to-device D2D controlled by network node communication is realized, comprising:

The resource allocation for the D2D configuration communicated and communicating for the D2D is received from the network node, it is described to match Set instruction transimission power or signal and noise and noise power ratio SINR；

Based on it is received configuration come select for the D2D communicate modulation and encoding scheme；And

Implement the D2D communication according to the resource allocation and selected modulation and encoding scheme.

10. according to the method described in claim 10, wherein described select to communicate for the D2D based on the received configuration of institute Modulation and encoding scheme include at least one of the following:

Selection can be by the highest modulation and encoding scheme of the configuration support from predefined modulation and encoding scheme set； And

If indicated transimission power or SINR are lower than threshold value, selection is not included in the predefined modulation and coding Encoding scheme in scheme set.

11. according to the method described in claim 10, further comprising:

Send the first signal and the second signal to the network node, first signal designation from the transmitter of cellular communication to The channel state information of the channel of the terminal device, and second signal instruction is for the described of the terminal device The channel state information of the channel of D2D communication.

12. a kind of network node, comprising:

First acquisition unit, the first acquisition unit are configured as obtaining the network node and being in and the network node The first channel state information of the channel between the first terminal equipment in cellular communication is carried out, and from device-to-device D2D Set of communication devices to the cellular communication between the network node and the first terminal equipment receiver channel Second channel status information；

Determination unit, the determination unit are configured as believing based on first channel state information and the second channel state Cease combine determine for the first terminal equipment the cellular communication and the D2D both resource allocation and For the first transimission power of D2D communication, so that the performance of the cellular communication of the first terminal equipment is higher than in advance The performance threshold of definition；And

First transmission unit, first transmission unit are configured as sending to the first terminal equipment identified for institute State the resource allocation of cellular communication.

13. network node according to claim 12, wherein the determination unit is configured as in the following conditions extremely The determination is executed under the conditions of one few:

14. network node according to claim 12, wherein the determination unit includes:

Computing unit, the computing unit are configured as at least based on first channel state information, the second channel shape State information and adjustable transimission power for D2D communication are calculated for the first terminal equipment and the network section The signal of the cellular communication between point and interference and noise power ratio SINR gather；And

SINR selecting unit, the SINR selecting unit are configured as being selected above from the calculated SINR set of institute described pre- The minimum SINR of the performance threshold of definition；And

Power determining unit, the power determining unit are configured as that first transimission power of the D2D communication will be used for It is determined as transimission power corresponding with selected minimum SINR.

15. network node according to claim 12, wherein the determination unit is configured as through solving optimization problem To determine the resource allocation and first transimission power:

x_j=0,1

16. network node according to claim 12, wherein the determination unit is configured as through solving optimization problem To determine the resource allocation and first transimission power:

x_j=0,1

WhereinIndicate the transmission power for j-th of D2D transmitter in the D2D set of communication devices；If the jth Resource block identical with the first terminal equipment is assigned in a D2D transmitter, then x_j=1, otherwise x_j=0；N is the D2D The number of terminal device in set of communication devices；Indicate the letter from j-th of D2D transmitter to the network node Road gain, and it is indicated by the second channel status information；P_CIndicate the transimission power of the first terminal equipment, h_CB Indicate channel gain from the first terminal equipment to the network node and its by first channel state information Lai Instruction, γ_minIndicate the predefined thresholds for being used for the first terminal equipment, and N is indicated at the network node Received noise power.

17. network node described in any one of 2-16 according to claim 1, wherein the first biography determined by the determination unit Defeated power is to communicate permitted maximum transmission power for the D2D.

18. the described in any item network nodes of 2-16 according to claim 1, further comprise: the second transmission unit, described second Transmission unit be configured as to the D2D set of communication devices send determined by for the D2D communicate resource allocation and First transimission power.

19. the described in any item network nodes of 2-16 according to claim 1, further comprise:

Second acquisition unit, the second acquisition unit are configured as obtaining from the first terminal equipment and the network node Between the cellular communication transmitter to the D2D communication equipment in the D2D set of communication devices channel third letter Channel state information, and for the D2D communication equipment the D2D communicate channel the 4th channel state information；

SINR determination unit, the SINR determination unit are configured as believing based on identified first transimission power, the third Channel state information and the 4th channel state information determine the signal of the D2D communication for the D2D communication equipment With interference and noise power ratio SINR；And

Third transmission unit, the third transmission unit are configured as sending identified SINR to the D2D communication equipment.

20. a kind of equipment in device-to-device D2D terminal device, comprising:

Receiving unit, the receiving unit are configured as receiving from network node for the D2D configuration communicated and for institute State the resource allocation of D2D communication, the configuration instruction transimission power or signal and noise and noise power ratio SINR；

MCS selecting unit, the MCS selecting unit are configured as selecting to communicate for the D2D based on the received configuration of institute Modulation and encoding scheme；And

D2D communication unit, the D2D communication unit are configured as according to the resource allocation and selected modulation and coding staff Case communicates to implement the D2D.

21. D2D terminal device according to claim 20, wherein the MCS selecting unit is configured as by following At least one of select the MCS:

22. D2D terminal device according to claim 20, further comprises:

Feedback unit, the feedback unit are configured as sending the first signal and the second signal to the network node, and described the The channel state information of channel of one signal designation from the transmitter of cellular communication to the terminal device, and second letter Number instruction for the terminal device the D2D communicate channel channel state information.

23. a kind of device realized at network node, described device include:

At least one processor；And

At least one processor, at least one processor include computer program code；

At least one processor and the computer program code are configured as making together at least one described processor Described device is obtained at least to execute:

24. a kind of device realized at terminal device, described device include:

At least one processor；And

At least one processor, at least one processor include computer program code；

25. a kind of device, including for executing according to claim 1 to the component of method described at least one of 8.

26. a kind of device, including the component for executing the method according at least one of claim 9 to 11.

27. a kind of computer program product, at least one including being stored thereon with program code computer-readable non-transient is deposited Storage medium, said program code when being executed by device so that described device execute according to claim 1 in 8 at least Method described in one.

28. a kind of computer program product, at least one including being stored thereon with program code computer-readable non-transient is deposited Storage medium, said program code by device when being executed, so that described device is executed according in claim 9 to 11 at least one Method described in.