CN104427510A

CN104427510A - A method, device and system for performing a D2D communication in an LTE TDD system

Info

Publication number: CN104427510A
Application number: CN201310373802.2A
Authority: CN
Inventors: 王飞
Original assignee: China Mobile Communications Group Co Ltd
Current assignee: China Mobile Communications Group Co Ltd
Priority date: 2013-08-23
Filing date: 2013-08-23
Publication date: 2015-03-18
Anticipated expiration: 2033-08-23
Also published as: CN104427510B

Abstract

The invention discloses a method, a device and a system for performing a D2D communication in an LTE TDD system. The invention mainly includes: selecting, by a base station, an identification number and a subframe number in time slot allocation for a first terminal and a second terminal, wherein the first terminal performs, according to the received identification number, a D2D communication to the second terminal on a subframe corresponding to the subframe number; and the second terminal performs, according to the received identification number, a D2D communication to the first terminal on the same subframe. Thus, the terminal does not have to reserve time and frequency resources for switching between receiving and transmitting since there is no need of switching between receiving and transmitting. The invention avoids waste of time and frequency spectrum resources while ensuring a normal execution of a D2D business.

Description

Method, the Apparatus and system of D2D communication in a kind of LTE TDD system

Technical field

The present invention relates to communication technical field, particularly relate to method, the Apparatus and system of D2D communication in a kind of LTE TDD system.

Background technology

D2D(Device-to-Device, device-to-device) communication technology is that a kind of permission directly carries out by reuse pattern resource the new technique that communicates between terminal, D2D technology can increase frequency spectrum efficiency of cellular communication system, reduce terminal transmitted power, solve the problem of wireless communication system frequency spectrum resource scarcity to a certain extent.

During by existing LTE TDD spectrum application in D2D technology; frame structure can comprise the subframe (subframe) of three types: descending sub frame (DL subframe), sub-frame of uplink (UL subframe) and special subframe (Special subframe); wherein, Special subframe comprises ascending pilot channel time slot (UpPTS), translation and protection time slot (GP) and downlink pilot frequency channel time slot (DwPTS).

In the D2D communication technology, a terminal (being referred to as first terminal) can send information at UL subframe to another terminal (being referred to as the second terminal), and accordingly, the second terminal need receive the information from first terminal in UL subframe.Under this D2D communication mode, the second terminal, when UL subframe receives information, needs, according to judging the forward and backward subframe type of this UL subframe, to determine whether needing to reserve certain guard time, for the conversion of uplink and downlink subframe.

As shown in Figure 1, be 7 kinds of uplink-downlink configuration schematic diagrames of frame structure in LTE TDD system.In kind of the uplink-downlink configuration of 7 shown in Fig. 1, UL subframe can be divided into following 4 classes according to the subframe type of front and back:

1st class UL subframe: adjacent last subframe is Special subframe, an adjacent rear subframe is DL subframe, can referred to as SUD class.

2nd class UL subframe: adjacent last subframe is Special subframe, an adjacent rear subframe is UL subframe, can referred to as SUU class.

3rd class UL subframe: adjacent last subframe is UL subframe, an adjacent rear subframe is DL subframe, can referred to as UUD class;

4th class UL subframe: adjacent last subframe is UL subframe, an adjacent rear subframe is UL subframe, can referred to as UUU class.

D2D communication is carried out for above-mentioned 4th class UL subframe, as shown in Figure 2, the situation that three UL subframe are adjacent has been there is in uplink-downlink configuration, suppose that first terminal sends D2D information to the second terminal on UL subframe2, because the second terminal is all in transmission state on UL subframe1 and UL subframe3, therefore, if the second terminal will receive the D2D information from first terminal on UL subframe2, then the second terminal need from the transmission State Transferring of UL subframe1 be accepting state UL subframe2, afterwards, after the second terminal finishes receiving the D2D information of first terminal transmission on UL subframe2, second terminal is converted to the transmission state of UL subframe3 again from the accepting state of UL subframe2.

For the situation of the 1st class UL subframe, the 2nd class UL subframe and the 3rd class UL subframe and the 4th kind of situation similar, when 1st class UL subframe carries out D2D communication, the second terminal has needed once from transmission state to the conversion of accepting state; When 2nd class UL subframe carries out D2D communication, second terminal has needed once from accepting state to the conversion of the state of transmission, and then complete once from transmission state to the conversion of accepting state, when 3rd class UL subframe carries out D2D communication, the second terminal has needed once from transmission state to the conversion of accepting state.

When terminal is from transmission State Transferring to accepting state, or when being converted to transmission state from accepting state, there will be refractory period (transmitter transient period when terminal sending and receiving state switches, TTP) (generally 20us is no more than), the sending and receiving stateful switchover process for terminal is needed to distribute a certain amount of frequency spectrum resource, the sending and receiving stateful switchover process being terminal distributes conversion duration, so that terminal can complete the switching of sending and receiving state in described conversion duration.

But, be cisco unity malfunction when terminal carries out the switching of sending and receiving state in described conversion duration, therefore, if be that each sending and receiving handoff procedure of terminal distributes frequency spectrum resource as conversion duration, then can cause the waste of frequency spectrum resource.

Summary of the invention

The embodiment of the present invention provides D2D in a kind of LTE TDD system method, the Apparatus and system of communication, in order to solve exist in prior art distribute the problem of the frequency spectrum resource waste that frequency spectrum resource causes as conversion duration for terminal sending and receiving handoff procedure.

The embodiment of the present invention is by the following technical solutions:

A method for D2D communication in LTE TDD system, the method comprises:

Base station sends identification number and at least two subframe numbers of the first time slot proportion mode chosen from preset time slot proportion mode set to first terminal, and the identification number of the second time slot proportion mode chosen from the set of described time slot proportion mode and identical subframe numbers is sent to the second terminal, wherein, the subframe that described at least two subframe numbers are corresponding has sub-frame of uplink and descending sub frame in the first time slot proportion mode, sub-frame of uplink and descending sub frame is had in the second time slot proportion mode, and the transmission direction of subframe in the first time slot proportion mode and the second time slot proportion mode corresponding to arbitrary subframe numbers is contrary,

Describedly send to the identification number of first terminal and subframe numbers to be used to indicate described first terminal on sub-frame of uplink, to send D2D information to described second terminal, descending sub frame receives the D2D information that described second terminal sends;

Describedly send to the identification number of the second terminal and subframe numbers to be used to indicate described second terminal on descending sub frame, to receive the D2D information that described first terminal sends, sub-frame of uplink sends D2D information to described first terminal.

In embodiments of the present invention, base station is respectively identification number and at least two subframe numbers that first terminal and the second terminal choose time slot proportion mode, sub-frame of uplink and descending sub frame is all there is in the subframe that described subframe numbers is corresponding in described time slot proportion mode, and transmission direction is contrary, therefore, first terminal the sub-frame of uplink in described time slot proportion mode can send D2D information to the second terminal, and on descending sub frame, receive the D2D information of the second terminal transmission; Equally, the second terminal the descending sub frame in described time slot proportion mode can receive the D2D information that first terminal sends, and sends D2D information to first terminal on sub-frame of uplink.Thus terminal, without the need to carrying out sending and receiving state handover operation, also just without the need to distributing frequency spectrum resource for sending and receiving state handover operation, when ensureing the normal execution of D2D business, avoids the waste of frequency spectrum resource.

Preferably, described preset time slot proportion mode set comprises: the 7 kinds of standard Timeslot proportioning modes defined in LTE TDD system and/or other time slot proportion modes.

In embodiments of the present invention, suitable time slot proportion mode not only can be chosen in base station from the time slot proportion mode of standard, can be also each terminal other time slot proportion modes self-defining according to resource requirement; Thus the resource requirement that can communicate according to D2D, for terminal chooses suitable time slot proportion mode flexibly.

Preferably, described base station sends at least two subframe numbers to described first terminal and described second terminal, specifically comprises:

Described base station determines that there is 2N subframe numbers meets: the subframe that a described 2N subframe numbers is corresponding has N number of sub-frame of uplink and N number of descending sub frame in the first time slot proportion mode, in the second time slot proportion mode, also have N number of sub-frame of uplink and N number of descending sub frame, and the transmission direction of arbitrary subframe in the first time slot proportion mode is contrary with the transmission direction in the second time slot proportion mode;

Described base station sends the subframe numbers of 2M subframe in a described 2N subframe to described first terminal and the second terminal, wherein, the subframe that a described 2M subframe numbers is corresponding has M sub-frame of uplink and M descending sub frame in the first time slot proportion mode, and described N and M is positive integer, and N is not less than M.

In embodiments of the present invention, base station can according to the demand of practical communication resource, chooses one or morely to send to the terminal needing to carry out D2D communication from multiple subframe numbers satisfied condition, and realizes the flexible use of frequency spectrum resource.

A method for D2D communication in LTE TDD system, the method comprises:

First terminal receives identification number and at least two subframe numbers of the first time slot proportion mode chosen from preset time slot proportion mode set that base station sends, and second terminal receive the identification number of the second time slot proportion mode and identical subframe numbers that described base station sends, wherein, the subframe that described at least two subframe numbers are corresponding has sub-frame of uplink and descending sub frame in the first time slot proportion mode, sub-frame of uplink and descending sub frame is had in the second time slot proportion mode, and the transmission direction of subframe in the first time slot proportion mode and the second time slot proportion mode corresponding to arbitrary subframe numbers is contrary,

Described first terminal is according to the described identification number received and described at least two subframe numbers, sub-frame of uplink sends D2D information to described second terminal, descending sub frame receives the D2D information that described second terminal sends, and, described second terminal is according to the described identification number received and described at least two subframe numbers, descending sub frame receives the D2D information that described first terminal sends, sub-frame of uplink sends D2D information to described first terminal.

A kind of base station, this base station comprises:

Determination module, for choosing identification number and at least two subframe numbers of the first time slot proportion mode from preset time slot proportion mode set, and the identification number of the second time slot proportion mode and identical subframe numbers is chosen from preset time slot proportion mode set, wherein, the subframe that described at least two subframe numbers are corresponding has sub-frame of uplink and descending sub frame in the first time slot proportion mode, sub-frame of uplink and descending sub frame is had in the second time slot proportion mode, and the transmission direction of subframe in the first time slot proportion mode and the second time slot proportion mode corresponding to arbitrary subframe numbers is contrary,

Sending module, first terminal is sent to for the identification number of described first time slot proportion mode chosen by determination module and at least two subframe numbers, and the identification number of the described second time slot proportion mode to be chosen by determination module sends to the second terminal with identical subframe numbers, wherein, the described identification number of first terminal and the subframe numbers of sending to is used to indicate described first terminal on sub-frame of uplink to described second terminal transmission D2D information, descending sub frame receives the D2D information that described second terminal sends, and, described send to the identification number of the second terminal and subframe numbers be used to indicate described second terminal receive on descending sub frame described first terminal send D2D information, sub-frame of uplink sends D2D information to described first terminal.

Preferably, described determination module is specifically for determining 2N subframe numbers, wherein, a described 2N subframe numbers has N number of sub-frame of uplink and N number of descending sub frame in the first time slot proportion mode, in the second time slot proportion mode, also have N number of sub-frame of uplink and N number of descending sub frame, and the transmission direction of arbitrary subframe in the first time slot proportion mode is contrary with the transmission direction in the second time slot proportion mode;

Described sending module, specifically for sending 2M subframe numbers in a described 2N subframe numbers to described first terminal and the second terminal, wherein, the subframe that a described 2M subframe numbers is corresponding has M sub-frame of uplink and M descending sub frame in the first time slot proportion mode, described N and M is positive integer, and N is not less than M.

A terminal for D2D communication in LTE TDD system, this terminal comprises:

Receiver module, for receiving identification number and at least two subframe numbers of the time slot proportion mode chosen from preset time slot proportion mode set that base station sends;

Communication module, for the time slot proportion mode that the described identification number received according to receiver module is corresponding, the sub-frame of uplink that at least two subframe numbers described in receiving are corresponding sends D2D information to other-end, descending sub frame receives the D2D information that described other-end sends.

A system for D2D communication in LTE TDD system, this system comprises:

Base station, for sending identification number and at least two subframe numbers of the first time slot proportion mode chosen from preset time slot proportion mode set to first terminal, and the identification number of the second time slot proportion mode chosen from the set of described time slot proportion mode and identical subframe numbers is sent to the second terminal, wherein, the subframe that described at least two subframe numbers are corresponding has sub-frame of uplink and descending sub frame in the first time slot proportion mode, sub-frame of uplink and descending sub frame is had in the second time slot proportion mode, and the transmission direction of subframe in the first time slot proportion mode and the second time slot proportion mode corresponding to arbitrary subframe numbers is contrary,

First terminal, for receiving identification number and at least two subframe numbers of the first time slot proportion mode that base station sends, and sends D2D information to described second terminal, descending sub frame receives the D2D information that described second terminal sends on sub-frame of uplink;

Second terminal, for receiving the identification number of the second time slot proportion mode that base station sends and identical subframe numbers, and receives the D2D information of described first terminal transmission, sub-frame of uplink sends D2D information to described first terminal on descending sub frame.

Preferably, described base station is specifically for sending 2M subframe numbers in 2N subframe numbers determining to described first terminal and the second terminal, wherein, the subframe that a described 2N subframe numbers is corresponding has N number of sub-frame of uplink and N number of descending sub frame in the first time slot proportion mode, also N number of sub-frame of uplink and N number of descending sub frame is had in the second time slot proportion mode, and the transmission direction of arbitrary subframe in the first time slot proportion mode is contrary with the transmission direction in the second time slot proportion mode, the subframe that a described 2M subframe numbers is corresponding has M sub-frame of uplink and M descending sub frame in the first time slot proportion mode, described N and M is positive integer, and N is not less than M.

A method for D2D communication in LTE TDD system, the method comprises:

Base station sends identification number and the subframe numbers of the first time slot proportion mode chosen from preset time slot proportion mode set to first terminal, send the identification number of the second time slot proportion mode and identical subframe numbers to the second terminal, be used to indicate described first terminal and carry out D2D with described second terminal according to the described identification number received and subframe numbers and communicate;

To carry out after D2D communicates according to the described identification number received and subframe numbers in described first terminal and described second terminal, the identification number of described second time slot proportion mode and described subframe numbers is sent again to first terminal, send the identification number of described first time slot proportion mode and described subframe numbers to the second terminal, be used to indicate described first terminal and carry out D2D with described second terminal according to the described identification number again received and subframe numbers and communicate;

Wherein, the transmission direction of the subframe that described subframe numbers is corresponding in the first time slot proportion mode is contrary with the transmission direction in the second time slot proportion mode.

In embodiments of the present invention, base station sends identification number and the subframe numbers of the first time slot proportion mode chosen to first terminal, send the identification number of the second time slot proportion mode chosen (there is sub-frame of uplink and there is descending sub frame in the second time slot proportion mode in the subframe that described subframe numbers is corresponding in the first time slot proportion mode with identical subframe numbers to the second terminal, and transmission direction is contrary), therefore, first terminal the sub-frame of uplink in described first time slot proportion mode can send D2D information to the second terminal, second terminal the descending sub frame in described second time slot proportion mode can receive the D2D information that first terminal sends.After D2D has communicated, base station sends identification number and the subframe numbers of the second time slot proportion mode again to first terminal, the identification number of the first time slot proportion mode and identical subframe numbers is sent to the second terminal, like this, within next cycle, first terminal the descending sub frame in described second time slot proportion mode can receive the information that the second terminal sends D2D, and the second terminal the sub-frame of uplink in described first time slot proportion mode can send D2D information to first terminal.Thus, terminal is without the need to carrying out sending and receiving state handover operation, also just without the need to distributing frequency spectrum resource for sending and receiving state handover operation, when ensureing the normal execution of D2D business, avoid the waste of frequency spectrum resource, the complexity that base station is first terminal and the second terminal configuration time interval resource can be reduced simultaneously.

Preferably, described base station determines that there is one or more subframe numbers meets: the transmission direction of the subframe that in described one or more subframe numbers, arbitrary subframe numbers is corresponding in described first time slot proportion mode is contrary with the transmission direction in described second time slot proportion mode;

Described base station sends at least one subframe numbers in described one or more subframe numbers to described first terminal and the second terminal.

A method for D2D communication in LTE TDD system, the method comprises:

First terminal receives identification number and the subframe numbers of the first time slot proportion mode that base station is chosen from preset time slot proportion mode set, second terminal receives the identification number of the second time slot proportion mode of base station selection and identical subframe numbers, wherein, the transmission direction of the subframe that described subframe numbers is corresponding in the first time slot proportion mode is contrary with the transmission direction in the second time slot proportion mode;

Described first terminal carries out D2D according to the identification number of the first time slot proportion mode received with subframe numbers and the second terminal and communicates, and the second terminal is carried out D2D according to the identification number of the second time slot proportion mode received with subframe numbers and described first terminal and communicated;

Described first terminal receives the identification number of the second time slot proportion mode that described base station sends and described subframe numbers again, and described second terminal receives the identification number of the first time slot proportion mode that base station sends and described subframe numbers again;

Described first terminal carries out D2D according to the identification number of the second time slot proportion mode received with subframe numbers and the second terminal and communicates, and the second terminal is carried out D2D according to the identification number of the first time slot proportion mode received with subframe numbers and described first terminal and communicated.

A kind of base station, this base station comprises:

Determination module, for choosing identification number and the subframe numbers of the first time slot proportion mode from preset time slot proportion mode set, and chooses the identification number of the second time slot proportion mode and identical subframe numbers from preset time slot proportion mode set;

Sending module, first terminal is sent to for the identification number of described first time slot proportion mode chosen by determination module and described subframe numbers, identification number and the described subframe numbers of the described second time slot proportion mode chosen by determination module send to the second terminal, be used to indicate described first terminal to carry out D2D with described second terminal according to the described identification number received and subframe numbers and communicate, and, the identification number of described second time slot proportion mode and described subframe numbers is sent again to first terminal, the identification number of described first time slot proportion mode and described subframe numbers is sent to the second terminal, be used to indicate described first terminal to carry out D2D with described second terminal according to the described identification number again received and subframe numbers and communicate,

Preferably, described determination module is specifically for determining one or more subframe numbers, wherein, the transmission direction of the subframe that in described one or more subframe numbers, arbitrary subframe numbers is corresponding in described first time slot proportion mode is contrary with the transmission direction in described second time slot proportion mode;

Described sending module, specifically for sending at least one subframe numbers in described one or more subframe numbers to described first terminal and the second terminal.

A kind of terminal, this terminal comprises:

Receiver module, for receiving identification number and the subframe numbers of the first time slot proportion mode that base station is chosen from preset time slot proportion mode set, carrying out after D2D communicates according to the described identification number that receives and subframe numbers and other-end, again receive the identification number of the second time slot proportion mode that described base station sends and identical subframe numbers, wherein, the transmission direction of the subframe that described subframe numbers is corresponding in the first time slot proportion mode is contrary with the transmission direction in the second time slot proportion mode;

Communication module, communicates for carrying out D2D according to the identification number of the first time slot proportion mode received with subframe numbers and other-end, and carries out D2D according to the identification number of the second time slot proportion mode received with subframe numbers and other-end and communicate.

A system for D2D communication in LTE TDD system, this system comprises:

Base station, for sending identification number and the subframe numbers of the first time slot proportion mode chosen from preset time slot proportion mode set to first terminal, the identification number of the second time slot proportion mode and identical subframe numbers is sent to the second terminal, and, to carry out after D2D communicates according to the described identification number received and subframe numbers in described first terminal and described second terminal, the identification number of described second time slot proportion mode and described subframe numbers is sent again to first terminal, the identification number of described first time slot proportion mode and described subframe numbers is sent to the second terminal, wherein, the transmission direction of subframe in the first time slot proportion mode that described subframe numbers is corresponding is contrary with the transmission direction in the second time slot proportion mode,

First terminal, communicate for carrying out D2D according to the identification number of described first time slot proportion mode received with described subframe numbers and the second terminal, and carry out D2D according to the identification number of the described second time slot proportion mode received with described subframe numbers and the second terminal and communicate;

Second terminal, communicate for carrying out D2D according to the identification number of described second time slot proportion mode received with described subframe numbers and first terminal, and carry out D2D according to the identification number of the described first time slot proportion mode received with described subframe numbers and first terminal and communicate.

Preferably, described base station is specifically for sending at least one subframe numbers in the one or more subframe numbers determined to described first terminal and the second terminal, wherein, the transmission direction of the subframe that in described one or more subframe numbers, arbitrary subframe numbers is corresponding in described first time slot proportion mode is contrary with the transmission direction in described second time slot proportion mode.

A method for D2D communication in LTE TDD system, the method comprises:

Base station sends the identification number of the first time slot proportion mode chosen from preset time slot proportion mode set, the identification number of the second time slot proportion mode, subframe numbers and the first order information to first terminal, be used to indicate the order of described first terminal according to described first order information instruction, adopt the first time slot proportion mode and the second time slot proportion mode successively, the subframe that described subframe numbers is corresponding carries out D2D with described second terminal and communicates; And

The identification number of described first time slot proportion mode, the identification number of described second time slot proportion mode, described subframe numbers and the second order information is sent to the second terminal, be used to indicate the order of described second terminal according to described second order information instruction, adopt the second time slot proportion mode and the first time slot proportion mode successively, the subframe that described subframe numbers is corresponding carries out D2D with described first terminal and communicates;

In embodiments of the present invention, base station is by first, two time slot proportion modes and subframe numbers all send to first terminal and the second terminal, in addition, return first terminal and have sent the first order information, the second order information is have sent to the second terminal, like this, can make terminal after receiving described resource information, correct time slot proportion mode is selected to carry out D2D communication according to the instruction of benchmark, and, subframe corresponding to subframe numbers in the program is consistent with the situation in embodiment five, D2D communication mode is consistent, thus, also terminal can be made to receive, hair-like state handover operation, also just without the need to being receipts, hair-like state handover operation distributes frequency spectrum resource, when ensureing the normal execution of D2D business, avoid the waste of frequency spectrum resource.

Preferably, described base station sends subframe numbers to described first terminal and described second terminal, specifically comprises:

Described base station determines that one or more subframe numbers meets: the transmission direction of the subframe that in described one or more subframe numbers, arbitrary subframe numbers is corresponding in described first time slot proportion mode is contrary with the transmission direction in described second time slot proportion mode;

Described base station sends at least one subframe numbers in the one or more subframe numbers determined to described first terminal and the second terminal.

A method for D2D communication in LTE TDD system, the method comprises:

The identification number of the first time slot proportion mode chosen from preset time slot proportion mode set that first terminal reception base station sends, the identification number of the second time slot proportion mode, subframe numbers and the first order information, second terminal receives the identification number of described first time slot proportion mode, the identification number of described second time slot proportion mode, described subframe numbers and the second order information that base station sends, wherein, the transmission direction of the subframe that described subframe numbers is corresponding in the first time slot proportion mode is contrary with the transmission direction in the second time slot proportion mode;

Described first terminal, according to the order of described first order information instruction, adopts the first time slot proportion mode and the second time slot proportion mode successively, the subframe that described subframe numbers is corresponding carries out D2D with described second terminal and communicates;

Described second terminal, according to the order of described second order information instruction, adopts the second time slot proportion mode and the first time slot proportion mode successively, the subframe that described subframe numbers is corresponding carries out D2D with described first terminal and communicates.

A kind of base station, this base station comprises:

Determination module, for choosing the identification number of the first time slot proportion mode, the identification number of the second time slot proportion mode and subframe numbers from preset time slot proportion mode set, and the first order information to determine for first terminal and be the second order information that the second terminal is determined, wherein, the transmission direction of the subframe that described subframe numbers is corresponding in the first time slot proportion mode is contrary with the transmission direction in the second time slot proportion mode;

Sending module, for the identification number of described first time slot proportion mode that determination module is chosen, the identification number of the second time slot proportion mode, described subframe numbers and the first order information send to first terminal, be used to indicate the order of described first terminal according to described first order information instruction, adopt the first time slot proportion mode and the second time slot proportion mode successively, the subframe that described subframe numbers is corresponding carries out D2D with described second terminal communicate, and, the identification number of the described first time slot proportion mode that determination module is chosen, the identification number of the second time slot proportion mode, described subframe numbers and the second order information send to the second terminal, be used to indicate the order of described second terminal according to described second order information instruction, adopt the second time slot proportion mode and the first time slot proportion mode successively, the subframe that described subframe numbers is corresponding carries out D2D with described first terminal and communicates.

Described sending module, specifically for sending at least one subframe numbers in the one or more subframe numbers determined to described first terminal and the second terminal.

A kind of terminal, this terminal comprises:

Receiver module, for receiving the identification number of the first time slot proportion mode that base station sends, the identification number of the second time slot proportion mode, subframe numbers and order information, wherein, the transmission direction of the subframe that described subframe numbers is corresponding in the first time slot proportion mode is contrary with the transmission direction in the second time slot proportion mode;

Communication module, for the order indicated according to described order information, adopts the first time slot proportion mode and the second time slot proportion mode successively, the subframe that described subframe numbers is corresponding carries out D2D with other-end and communicates.

A system for D2D communication in LTE TDD system, this system comprises:

Base station, for sending the identification number of the first time slot proportion mode chosen in preset time slot proportion mode set, the identification number of the second time slot proportion mode, subframe numbers and the first order information to first terminal, the identification number of described first time slot proportion mode, the identification number of described second time slot proportion mode, described subframe numbers and the second order information is sent to the second terminal, wherein, the transmission direction of the subframe that described subframe numbers is corresponding in the first time slot proportion mode is contrary with the transmission direction in the second time slot proportion mode;

Described first terminal, for the order according to described first order information instruction, adopts the first time slot proportion mode and the second time slot proportion mode successively, the subframe that described subframe numbers is corresponding carries out D2D with described second terminal and communicates;

Described second terminal, for the order according to described second order information instruction, adopts the second time slot proportion mode and the first time slot proportion mode successively, the subframe that described subframe numbers is corresponding carries out D2D with described first terminal and communicates.

Accompanying drawing explanation

In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly introduced, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is 7 kinds of uplink-downlink configuration schematic diagrames of frame structure in LTE TDD system in background technology of the present invention;

Fig. 2 is the time interval resource configuration information schematic diagram of eNodeB, UE1 and UE2 when having occurred in uplink-downlink configuration that three UL subframe are adjacent in background technology of the present invention;

Fig. 3 is the method step schematic diagram of D2D communication in the embodiment of the present invention one;

Fig. 4 is the schematic diagram carrying out D2D communication in example 1 of the present invention in standard Timeslot proportioning mode;

Fig. 5 is the schematic diagram carrying out D2D communication in example 2 of the present invention in other time slot proportion modes self-defining;

Fig. 6 is the specific functional modules schematic diagram of base station in the embodiment of the present invention two;

Fig. 7 is the specific functional modules schematic diagram of terminal in the embodiment of the present invention three;

Fig. 8 is the specific functional modules schematic diagram of system in the embodiment of the present invention four;

Fig. 9 is the method step schematic diagram of D2D communication in the embodiment of the present invention five;

Figure 10 is the schematic diagram carrying out D2D communication in the embodiment of the present invention five in standard Timeslot proportioning mode;

Figure 11 is the schematic diagram carrying out D2D communication in the embodiment of the present invention five in other time slot proportion modes self-defining;

Figure 12 is the method step schematic diagram of D2D communication in the embodiment of the present invention nine.

Embodiment

In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail, and obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.

In order to solve the problem changing the wasting of resources that duration causes in D2D communication, the embodiment of the present invention proposes a kind of D2D communication mode based on LTE TDD system: identification number and the subframe numbers of time slot proportion mode are chosen in base station from preset time slot proportion mode set by being respectively first terminal and the second terminal, make first terminal and the second terminal all can carry out reception and the transmission of D2D information complete at least one times in one-period, simultaneously, if when frequency spectrum resource deficient and high to time delay tolerance, also first terminal and the second terminal can be allowed to occur in one-period, and incomplete D2D communicates (namely receive only or only send), in next cycle, first terminal and the second terminal switch use the time slot proportion mode of distributing, complete transmission and the receiving course of D2D information complete at least one times.

By above-mentioned D2D communication mode, evade the uplink and downlink subframe caused due to D2D communication in conventional LTE TDD system to change and the conversion duration (this conversion duration can not carry out the transmission of normal data message) of generation, thus avoid the waste of frequency spectrum resource.

It should be noted that, in embodiments of the present invention, described first terminal and the second terminal are all supported and are opened D2D communication function.

In embodiments of the present invention, when first terminal is the transmit leg of D2D communication, the second terminal is the recipient of D2D communication; When first terminal is the recipient of D2D communication, the second terminal is the transmit leg of D2D communication.Here first, second is for distinguishing different terminals, does not limit terminal itself, and described first terminal and the second terminal have the ability receiving D2D information and the ability sending D2D information simultaneously.And, in embodiments of the present invention, first terminal and the second terminal can perform reception complete at least one times in one-period and send the operation of D2D information (namely first terminal in a certain subframe to the second terminal transmission D2D information, another subframe of same period receives the D2D information that the second terminal sends), also (namely first terminal sends D2D information to the second terminal in one-period in a certain subframe can to perform the operation receiving and send D2D information at least one times within two cycles, in a certain subframe, the D2D information that the second terminal sends is received) within next cycle.

Described preset time slot proportion mode set comprises: the 7 kinds of standard Timeslot proportioning modes (as shown in Figure 1) defined in LTE TDD system and/or other time slot proportion modes.

Describe the present invention below in conjunction with specific embodiment, but the present invention is not limited to following examples.

Embodiment one:

The embodiment of the present invention one describes a kind of method that D2D communicates, and in the method for the present embodiment one, first terminal and the second terminal can realize the sending and receiving process of D2D information in one-period, as shown in Figure 3, mainly comprise the following steps:

Step 101: the first time slot proportion mode and the second time slot proportion mode are chosen in base station from preset time slot proportion mode set, and at least two subframe numbers of these two kinds of time slot proportion modes.

The time slot proportion mode that base station selection is different, but choose identical subframe numbers, the subframe that described subframe numbers is corresponding has sub-frame of uplink also to have descending sub frame in the first time slot proportion mode, in the second time slot proportion mode, there is sub-frame of uplink also to have descending sub frame, and, the transmission direction of subframe in the first time slot proportion mode that arbitrary subframe numbers is corresponding is contrary with the transmission direction in the second time slot proportion mode, this is because:

On the one hand, described first time slot proportion mode is the time slot proportion mode that the transmit leg first terminal communicated for D2D is chosen, described second time slot proportion mode is the time slot proportion mode that recipient second terminal communicated for D2D is chosen, do not occur when carrying out D2D and communicating receiving in order to ensure first terminal and the second terminal, hair-like state switches, therefore, the state that need send D2D information with first terminal for the frequency spectrum resource carrying out D2D communication of distributing for first terminal adapts, be that the state that need receive D2D information with the second terminal for the frequency spectrum resource carrying out D2D communication of the second terminal distribution adapts, so different time slot proportion modes will be chosen for first terminal and the second terminal, and it is contrary with the transmission direction in the second time slot proportion mode to choose the transmission direction of subframe corresponding to arbitrary subframe numbers in the first time slot proportion mode.

On the other hand, D2D can be carried out in order to ensure first terminal in same time section with the second terminal to communicate, therefore, first terminal and the second terminal need in the identical subframe of different time-gap proportioning mode, to carry out D2D communicate, so will choose identical subframe numbers for first terminal and the second terminal.

Alternatively, each time slot proportion mode in the set of time slot proportion mode can identify by described base station in advance, determine multipair time slot proportion mode, wherein, in often pair of time slot proportion mode, the subframe that at least two subframe numbers are corresponding has sub-frame of uplink and descending sub frame in the first time slot proportion mode, in the second time slot proportion mode, have sub-frame of uplink and descending sub frame, and the transmission direction of subframe in the first time slot proportion mode and the second time slot proportion mode corresponding to arbitrary subframe numbers is contrary.When performing this step 101, base station can using a pair time slot proportion mode in the multipair time slot proportion mode determined as the time slot proportion mode chosen, and using subframe numbers that subframe numbers contrary for transmission direction in a pair time slot proportion mode chosen is chosen as this step 101.

In define in LTE TDD system in Fig. 17 kinds of standard Timeslot proportioning modes:

Configuration_2 and configuration_4 is a pair time slot proportion mode, wherein, in configuration_2, subframe numbers be 3 subframe be descending sub frame, subframe numbers be 7 subframe be sub-frame of uplink, in configuration_4, subframe numbers be 3 subframe be sub-frame of uplink, subframe numbers be 7 subframe be descending sub frame;

Configuration_2 and configuration_3 also can be a pair time slot proportion mode, wherein, in configuration_2, subframe numbers be 4 subframe be descending sub frame, subframe numbers be 7 subframe be sub-frame of uplink, in configuration_3, subframe numbers be 4 subframe be sub-frame of uplink, subframe numbers be 7 subframe be descending sub frame.

By that analogy, base station can pre-determine multipair time slot proportion mode and subframe numbers.

Step 102: described base station sends identification number and at least two subframe numbers of described first time slot proportion mode to described first terminal, and sends the identification number of described second time slot proportion mode and identical subframe numbers to the second terminal.

Particularly, described identification number and subframe numbers can be added in described base station in resource indication information, and send to described first terminal and the second terminal respectively, described resource indication information can be radio resource control (Radio Resource Control, RRC) protocol message such as signaling, the embodiment of the present invention does not limit the concrete communication mode between base station and terminal.

Alternatively, base station is, after described first terminal and the second terminal choose the first time slot proportion mode and the second time slot proportion mode, may occur that 2N subframe meets the following conditions:

A described 2N subframe has N number of sub-frame of uplink and N number of descending sub frame in the first time slot proportion mode, in the second time slot proportion mode, also have N number of sub-frame of uplink and N number of descending sub frame, and the transmission direction of arbitrary subframe in the first time slot proportion mode is contrary with the transmission direction in the second time slot proportion mode.

In the case, the all subframe numbers meeting above condition can be sent to first terminal and the second terminal by described base station respectively, also wherein parton frame number can be sent to first terminal and the second terminal, the embodiment of the present invention does not limit the quantity of the subframe numbers sent, as long as guarantee that the corresponding subframe of at least two subframe numbers sent has sub-frame of uplink and descending sub frame in the first time slot proportion mode, and have sub-frame of uplink and descending sub frame in the second time slot proportion mode.

Step 103: described first terminal is according to the described identification number received and described at least two subframe numbers, sub-frame of uplink sends D2D information to described second terminal, descending sub frame receives the D2D information that described second terminal sends, and, described second terminal is according to the described identification number received and described at least two subframe numbers, descending sub frame receives the D2D information that described first terminal sends, sub-frame of uplink sends D2D information to described first terminal.

Be handed down in the first time slot proportion mode of first terminal due to base station and have sub-frame of uplink and descending sub frame, be handed down in the second time slot proportion mode of the second terminal and also have sub-frame of uplink and descending sub frame, and transmission direction is contrary, therefore, first terminal is without the need to carrying out the switching of sending and receiving state, directly on the sub-frame of uplink of base station instruction, D2D information can be sent to the second terminal, and on descending sub frame, receive the D2D information of the second terminal transmission; In like manner, the second terminal, also without the need to carrying out the switching of sending and receiving state, directly can receive the D2D information that first terminal sends, and send D2D information to first terminal on sub-frame of uplink on the descending sub frame of base station instruction.

By the scheme of above embodiment one, base station is respectively identification number and at least two subframe numbers that first terminal and the second terminal choose time slot proportion mode, sub-frame of uplink and descending sub frame is all there is in the subframe that described subframe numbers is corresponding in described time slot proportion mode, and transmission direction is contrary, therefore, first terminal the sub-frame of uplink in described time slot proportion mode can send D2D information to the second terminal, and on descending sub frame, receive the D2D information of the second terminal transmission; Equally, the second terminal the descending sub frame in described time slot proportion mode can receive the D2D information that first terminal sends, and sends D2D information to first terminal on sub-frame of uplink.Thus terminal, without the need to carrying out sending and receiving state handover operation, also just without the need to distributing frequency spectrum resource for sending and receiving state handover operation, when ensureing the normal execution of D2D business, avoids the waste of frequency spectrum resource.

Be described below by the scheme of concrete example to the embodiment of the present invention one.

Example 1:

Suppose that base station is according to define in LTE TDD system 7 kinds of standard Timeslot proportioning modes, have chosen the second time slot proportion mode that the first time slot proportion mode that identification number is configuration_4 and identification number are configuration_2, shown in Figure 4, subframe numbers be 3 subframe be descending sub frame in configuration_2, be sub-frame of uplink in configuration_4; Subframe numbers be 7 subframe be sub-frame of uplink in configuration_2, be descending sub frame in configuration_4.

Base station can send resource indication information to first terminal, and { configuration_4, subframe3, subframe7}, base station can send resource indication information { configuration_2, subframe3, subframe7} to the second terminal.

First terminal receives { configuration_4, after subframe3, subframe7}, according to the time slot proportion mode of configuration_4, subframe3 sends D2D information to the second terminal, and on subframe7, receives the D2D information of the second terminal transmission; Second terminal receives { after configuration_2, subframe3}, according to the time slot proportion mode of configuration_2, subframe3 to be received the D2D information that first terminal sends, and send D2D information to first terminal on subframe7.

Example 2:

Base station is that first terminal and the second terminal choose other time slot proportion modes self-defining, as shown in Figure 5, wherein, the identification number of the first time slot proportion mode chosen is configuration_X, the identification number of the second time slot proportion mode chosen is configuration_Y, subframe numbers be 3 and 4 subframe be sub-frame of uplink in configuration_X, be descending sub frame in configuration_Y; Subframe numbers be 8 and 9 subframe be descending sub frame in configuration_X, be sub-frame of uplink in configuration_Y.

Base station can send resource indication information { configuration_X to first terminal, subframe3, subframe4, subframe8, subframe9}, base station can send resource indication information { configuration_Y to the second terminal, subframe3, subframe4, subframe8, subframe9}, in this example 2, base station can from { subframe3, at least one subframe is selected in subframe4}, and from { subframe8, at least one subframe is selected in subframe9}, the subframe numbers of the subframe of selection is carried in resource indication information and issues, this example is to send subframe3 simultaneously, subframe4, subframe8 and subframe9 is that example is described.

First terminal receives { configuration_X, subframe3, subframe4, subframe8, after subframe9}, according to the time slot proportion mode of configuration_X, subframe3, subframe4 send D2D information to the second terminal, and on subframe8, subframe9, receive the D2D information of the second terminal transmission; Second terminal receives { configuration_Y, subframe3, subframe4, subframe8, after subframe9}, according to the time slot proportion mode of configuration_Y, subframe3, subframe4 receive the D2D information that first terminal sends, and it is upper to first terminal transmission D2D information at subframe8, subframe9.

Corresponding to the method for D2D communication in the LTE TDD system that the embodiment of the present invention one provides, the embodiment of the present invention two additionally provides the base station for D2D communication in a kind of LTE TDD system.Following examples two introduce this base station in detail.

Embodiment two:

As shown in Figure 6, be the specific functional modules schematic diagram of base station in the embodiment of the present invention two, mainly comprise:

Determination module 201, for choosing identification number and at least two subframe numbers of the first time slot proportion mode from preset time slot proportion mode set, and choose the identification number of the second time slot proportion mode and identical subframe numbers from preset time slot proportion mode set; Wherein, the subframe that described at least two subframe numbers are corresponding has sub-frame of uplink and descending sub frame in the first time slot proportion mode, in the second time slot proportion mode, have sub-frame of uplink and descending sub frame, and the transmission direction of subframe in the first time slot proportion mode and the second time slot proportion mode corresponding to arbitrary subframe numbers is contrary.

Sending module 202, first terminal is sent to for the identification number of described first time slot proportion mode chosen by determination module 201 and at least two subframe numbers, and the identification number of the described second time slot proportion mode to be chosen by determination module 201 sends to the second terminal with identical subframe numbers, wherein, the described identification number of first terminal and the subframe numbers of sending to is used to indicate described first terminal on sub-frame of uplink to described second terminal transmission D2D information, descending sub frame receives the D2D information that described second terminal sends, and, described send to the identification number of the second terminal and subframe numbers be used to indicate described second terminal receive on descending sub frame described first terminal send D2D information, sub-frame of uplink sends D2D information to described first terminal.

Preferably, described determination module 201 is specifically for determining 2N subframe numbers, wherein, a described 2N subframe numbers has N number of sub-frame of uplink and N number of descending sub frame in the first time slot proportion mode, in the second time slot proportion mode, also have N number of sub-frame of uplink and N number of descending sub frame, and the transmission direction of arbitrary subframe in the first time slot proportion mode is contrary with the transmission direction in the second time slot proportion mode.

Preferably, described sending module 202 is specifically for sending 2M subframe numbers in a described 2N subframe numbers to described first terminal and the second terminal, wherein, the subframe that a described 2M subframe numbers is corresponding has M sub-frame of uplink and M descending sub frame in the first time slot proportion mode, described N and M is positive integer, and N is not less than M.

Corresponding to the method for D2D communication in the LTE TDD system that the embodiment of the present invention one provides, the embodiment of the present invention three additionally provides the terminal for D2D communication in a kind of LTE TDD system.Following examples three introduce this terminal in detail.

Embodiment three:

As shown in Figure 7, be the specific functional modules schematic diagram of terminal in the embodiment of the present invention three, mainly comprise:

Receiver module 301, for receiving identification number and at least two subframe numbers of the time slot proportion mode chosen from preset time slot proportion mode set that base station sends.

Communication module 302, for the time slot proportion mode that the described identification number received according to receiver module 301 is corresponding, the sub-frame of uplink that at least two subframe numbers described in receiving are corresponding sends D2D information to other-end, descending sub frame receives the D2D information that described other-end sends.

In above embodiment two, in three, be respectively first terminal and the second terminal by the determination module of base station to choose the identification number of time slot proportion mode and at least two subframe numbers (subframe that described subframe numbers is corresponding all exists sub-frame of uplink and descending sub frame in described time slot proportion mode, and transmission direction is contrary), and utilize sending module to send to first terminal and the second terminal respectively, make when carrying out D2D communication, the described time slot proportion mode that first terminal can receive according to receiver module, and utilize communication module to send D2D information to the second terminal on the sub-frame of uplink of this time slot proportion mode, and on descending sub frame, receive the D2D information of the second terminal transmission, equally, the second terminal the descending sub frame in described time slot proportion mode can receive the D2D information that first terminal sends, and sends D2D information to first terminal on sub-frame of uplink.Thus terminal, without the need to carrying out sending and receiving state handover operation, also just without the need to distributing frequency spectrum resource for sending and receiving state handover operation, when ensureing the normal execution of D2D business, avoids the waste of frequency spectrum resource.

Corresponding to the method for D2D communication in the LTE TDD system that the embodiment of the present invention one provides, the embodiment of the present invention four additionally provides the system of D2D communication in a kind of LTE TDD system, and following examples four introduce this system in detail.

Embodiment four:

As shown in Figure 8, be the specific functional modules schematic diagram of system in the embodiment of the present invention four, mainly comprise: base station 401, first terminal 402 and the second terminal 403, wherein:

Base station 401, for sending identification number and at least two subframe numbers of the first time slot proportion mode chosen from preset time slot proportion mode set to first terminal 402, and send the identification number of the second time slot proportion mode chosen from the set of described time slot proportion mode and identical subframe numbers to the second terminal 403.

First terminal 402, for receiving identification number and at least two subframe numbers of the first time slot proportion mode that base station 401 sends, and D2D information is sent to described second terminal 403 on sub-frame of uplink, descending sub frame receives the D2D information that described second terminal 403 sends.

Second terminal 403, for receiving the identification number of the second time slot proportion mode that base station 401 sends and identical subframe numbers, and on descending sub frame, receive the D2D information of described first terminal 402 transmission, sub-frame of uplink sends D2D information to described first terminal 402.

Wherein, the subframe that described at least two subframe numbers are corresponding has sub-frame of uplink and descending sub frame in the first time slot proportion mode, in the second time slot proportion mode, have sub-frame of uplink and descending sub frame, and the transmission direction of subframe in the first time slot proportion mode and the second time slot proportion mode corresponding to arbitrary subframe numbers is contrary.

Preferably, described base station 401 is specifically for sending 2M subframe numbers in 2N the subframe numbers determined to described first terminal 402 and the second terminal 403, wherein, the subframe that a described 2N subframe numbers is corresponding has N number of sub-frame of uplink and N number of descending sub frame in the first time slot proportion mode, also N number of sub-frame of uplink and N number of descending sub frame is had in the second time slot proportion mode, and the transmission direction of arbitrary subframe in the first time slot proportion mode is contrary with the transmission direction in the second time slot proportion mode, the subframe that a described 2M subframe numbers is corresponding has M sub-frame of uplink and M descending sub frame in the first time slot proportion mode, described N and M is positive integer, and N is not less than M.

The embodiment of the present invention five additionally provides a kind of method for D2D communication in LTE TDD system.Following examples five introduce the method in detail.

Embodiment five:

The embodiment of the present invention five provides a kind of D2D communication means, in the method for embodiment five, first terminal and the second terminal exchange the time interval resource using base station assigns within two cycles, even if first terminal and the second terminal cannot complete once complete D2D information sending and receiving process in one-period, complete D2D information sending and receiving process also at least can be completed once through two all after dates; The complexity that base station is first terminal and the second terminal configuration time interval resource can be reduced simultaneously, base station is after first terminal and the second terminal configuration time interval resource, and the time interval resource that first terminal and the second terminal switch can be indicated to distribute also normally can carry out D2D transmission.

As shown in Figure 9, mainly comprise the following steps:

Step 501: the first time slot proportion mode and the second time slot proportion mode are chosen in base station from preset time slot proportion mode set, and the subframe numbers of these two kinds of time slot proportion modes.

Step 502: described base station sends identification number and the subframe numbers of described first time slot proportion mode to described first terminal, sends the identification number of described second time slot proportion mode and identical subframe numbers to the second terminal.

Step 503: described first terminal carries out D2D according to the identification number of the first time slot proportion mode received with subframe numbers and the second terminal and communicates, the second terminal is carried out D2D according to the identification number of the second time slot proportion mode received with subframe numbers and described first terminal and is communicated.

Step 504: base station sends the identification number of described second time slot proportion mode and described subframe numbers to first terminal again, sends the identification number of described first time slot proportion mode and described subframe numbers to the second terminal.

Base station, in this step 504, will sending to the identification number of first terminal again to send to the second terminal, again sending to first terminal by sending to the identification number of the second terminal in step 502 in step 502.

Step 505: described first terminal carries out D2D according to the identification number of the second time slot proportion mode received with subframe numbers and the second terminal and communicates, and the second terminal is carried out D2D according to the identification number of the first time slot proportion mode received with subframe numbers and described first terminal and is communicated.

Due in step 503 and step 505, first terminal receives the identification number of the first time slot proportion mode and the identification number of the second time slot proportion mode respectively, therefore, if first terminal sends D2D information to the second terminal in step 503, then in this step 505, first terminal receives the D2D information (if transmission direction is contrary, then in like manner) that the second terminal sends;

Due in step 503 and step 505, second terminal receives the identification number of the second time slot proportion mode and the identification number of the first time slot proportion mode respectively, therefore, if the second terminal receives the D2D information that first terminal sends in step 503, then in this step 505, second terminal sends D2D information (if transmission direction is contrary, then in like manner) to first terminal.

By above embodiment five, base station sends identification number and the subframe numbers of the first time slot proportion mode chosen to first terminal, send the identification number of the second time slot proportion mode chosen (there is sub-frame of uplink and there is descending sub frame in the second time slot proportion mode in the subframe that described subframe numbers is corresponding in the first time slot proportion mode with identical subframe numbers to the second terminal, and transmission direction is contrary), therefore, first terminal the sub-frame of uplink in described first time slot proportion mode can send D2D information to the second terminal, second terminal the descending sub frame in described second time slot proportion mode can receive the D2D information that first terminal sends.After D2D has communicated, base station sends identification number and the subframe numbers of the second time slot proportion mode again to first terminal, the identification number of the first time slot proportion mode and identical subframe numbers is sent to the second terminal, like this, within next cycle, first terminal the descending sub frame in described second time slot proportion mode can receive the information that the second terminal sends D2D, and the second terminal the sub-frame of uplink in described first time slot proportion mode can send D2D information to first terminal.Thus terminal, without the need to carrying out sending and receiving state handover operation, also just without the need to distributing frequency spectrum resource for sending and receiving state handover operation, when ensureing the normal execution of D2D business, avoids the waste of frequency spectrum resource.

Be described below by the scheme of concrete example to the embodiment of the present invention five.

Example 3:

Suppose that base station is according to define in LTE TDD system 7 kinds of standard Timeslot proportioning modes, have chosen the second time slot proportion mode that the first time slot proportion mode that identification number is configuration_4 and identification number are configuration_2, shown in Figure 10, subframe numbers be 3 subframe be sub-frame of uplink in configuration_4, be descending sub frame in configuration_2.

Base station first can send resource indication information to first terminal, and { configuration_4, subframe3}, send resource indication information { configuration_2, subframe3} to the second terminal; First terminal and the second terminal carry out the operation of first terminal to the second terminal transmission D2D information according to the resource indication information received respectively; Afterwards, base station can send resource indication information { configuration_2 to first terminal again, subframe3}, resource indication information { configuration_4 is sent to the second terminal, subframe3}, first terminal and the second terminal carry out the operation of the second terminal to first terminal transmission D2D information according to the resource indication information again received respectively.

Example 4:

Base station is that first terminal and the second terminal choose other time slot proportion modes self-defining, as shown in figure 11, wherein, the identification number of the first time slot proportion mode chosen is configuration_X, the identification number of the second time slot proportion mode chosen is configuration_Y, subframe numbers be 3 and 4 subframe be sub-frame of uplink in configuration_X, be descending sub frame in configuration_Y.

Base station first can send resource indication information { configuration_X to first terminal, subframe3, subframe4}, resource indication information { configuration_Y is sent to the second terminal, subframe3, subframe4}, first terminal sends D2D information to the second terminal on subframe3 and subframe4; Afterwards, base station sends resource indication information { configuration_Y to first terminal again, subframe3, subframe4}, resource indication information { configuration_X is sent to the second terminal, subframe3, subframe4}, first terminal receives the D2D information that the second terminal sends on subframe3 and subframe4.

It should be noted that, when base station determines that there is one or more subframe numbers meets: the transmission direction of the subframe that in described one or more subframe numbers, arbitrary subframe numbers is corresponding in described first time slot proportion mode is contrary with the transmission direction in described second time slot proportion mode, described base station can send at least one subframe numbers in described one or more subframe numbers to described first terminal and the second terminal.

For above-mentioned example 4, base station can send at least one subframe numbers in subframe3 and subframe4 to first terminal and the second terminal.

Corresponding to the method for D2D communication in the LTE TDD system that the embodiment of the present invention five provides, the embodiment of the present invention six additionally provides a kind of base station.Base station corresponding to the method, terminal and system and the base station corresponding to the method in embodiment one, terminal are identical with the functional module of system, the concrete function being only modules is different, therefore adopts the high-level schematic functional block diagram of the base station corresponding to the method in embodiment one, terminal and system.Following examples six introduce this base station in detail.

Embodiment six:

As shown in Figure 6, be the specific functional modules schematic diagram of base station in the embodiment of the present invention six, mainly comprise:

Determination module 201, for choosing identification number and the subframe numbers of the first time slot proportion mode from preset time slot proportion mode set, and chooses the identification number of the second time slot proportion mode and identical subframe numbers from preset time slot proportion mode set.

Sending module 202, first terminal is sent to for the identification number of described first time slot proportion mode chosen by determination module and described subframe numbers, identification number and the described subframe numbers of the described second time slot proportion mode chosen by determination module send to the second terminal, be used to indicate described first terminal to carry out D2D with described second terminal according to the described identification number received and subframe numbers and communicate, and, the identification number of described second time slot proportion mode and described subframe numbers is sent again to first terminal, the identification number of described first time slot proportion mode and described subframe numbers is sent to the second terminal, be used to indicate described first terminal to carry out D2D with described second terminal according to the described identification number again received and subframe numbers and communicate.

Preferably, described determination module 201 is specifically for determining one or more subframe numbers, wherein, the transmission direction of the subframe that in described one or more subframe numbers, arbitrary subframe numbers is corresponding in described first time slot proportion mode is contrary with the transmission direction in described second time slot proportion mode.

Preferably, described sending module 202 is specifically for sending at least one subframe numbers in described one or more subframe numbers to described first terminal and the second terminal.

Corresponding to the method for D2D communication in the LTE TDD system that the embodiment of the present invention five provides, the embodiment of the present invention seven additionally provides the terminal for D2D communication in a kind of LTE TDD system.Following examples seven introduce this terminal in detail.

Embodiment seven:

As shown in Figure 7, be the specific functional modules schematic diagram of terminal in the embodiment of the present invention seven, mainly comprise:

Receiver module 301, for receiving identification number and the subframe numbers of the first time slot proportion mode that base station is chosen from preset time slot proportion mode set, carrying out after D2D communicates according to the described identification number that receives and subframe numbers and other-end, again receive the identification number of the second time slot proportion mode of described base station selection and identical subframe numbers, wherein, the transmission direction of the subframe that described subframe numbers is corresponding in the first time slot proportion mode is contrary with the transmission direction in the second time slot proportion mode.

Communication module 302, communicates for carrying out D2D according to the identification number of the first time slot proportion mode received with subframe numbers and other-end, and carries out D2D according to the identification number of the second time slot proportion mode received with subframe numbers and other-end and communicate.

Corresponding to the method for D2D communication in the LTE TDD system that the embodiment of the present invention five provides, the embodiment of the present invention eight additionally provides the system for D2D communication in a kind of LTE TDD system.Following examples eight introduce this system in detail.

Embodiment eight:

As shown in Figure 8, be the specific functional modules schematic diagram of system in the embodiment of the present invention eight, mainly comprise: base station 401, first terminal 402 and the second terminal 403, wherein:

Base station 401, for sending identification number and the subframe numbers of the first time slot proportion mode chosen from preset time slot proportion mode set to first terminal 402, the identification number of the second time slot proportion mode and identical subframe numbers is sent to the second terminal 403, and, to carry out after D2D communicates according to the described identification number received and subframe numbers in described first terminal 402 and described second terminal 403, the identification number of described second time slot proportion mode and described subframe numbers is sent again to first terminal 402, the identification number of described first time slot proportion mode and described subframe numbers is sent to the second terminal 403, wherein, the transmission direction of subframe in the first time slot proportion mode that described subframe numbers is corresponding is contrary with the transmission direction in the second time slot proportion mode.

First terminal 402, communicate for carrying out D2D with described subframe numbers with the second terminal 403 according to the identification number of described first time slot proportion mode received, and carry out D2D with described subframe numbers with the second terminal 403 according to the identification number of the described second time slot proportion mode received and communicate.

Second terminal 403, communicate for carrying out D2D with described subframe numbers with first terminal 402 according to the identification number of described second time slot proportion mode received, and carry out D2D with described subframe numbers with first terminal 402 according to the identification number of the described first time slot proportion mode received and communicate.

Preferably, described base station 401 is specifically for sending at least one subframe numbers in the one or more subframe numbers determined to described first terminal 402 and the second terminal 403, wherein, the transmission direction of the subframe that in described one or more subframe numbers, arbitrary subframe numbers is corresponding in described first time slot proportion mode is contrary with the transmission direction in described second time slot proportion mode.

The embodiment of the present invention nine additionally provides a kind of method for D2D communication in LTE TDD system.Following examples nine introduce the method in detail.

Embodiment nine:

The embodiment of the present invention nine describes a kind of D2D communication means, in the method for embodiment nine, base station is the identification number of the first time slot proportion mode that first terminal is identical with the second terminal configuration, the identification number of the second time slot proportion mode, subframe numbers, and be respectively first terminal and the second terminal configuration first order information and the second order information, make first terminal and the second terminal can respectively according to respective order information within two cycles, corresponding time slot proportion mode is used to carry out D2D communication, even if first terminal and the second terminal cannot complete once complete D2D information receipts in one-period, the process of sending out, also complete D2D information receipts at least can be completed once through two all after dates, the process of sending out, the complexity that base station is first terminal and the second terminal configuration time interval resource can be reduced simultaneously.

As shown in figure 12, mainly comprise the following steps:

Step 601: the identification number of the first time slot proportion mode, identification number, the subframe numbers of the second time slot proportion mode are chosen in base station from preset time slot proportion mode set, and the first order information and the second order information.

Have recorded the sequencing that the first time slot proportion mode and the second time slot proportion mode use in described first order information and the second order information respectively, and the sequencing recorded in the first order information and the second order information is contrary.

Step 602: base station sends the identification number of the first time slot proportion mode, the identification number of the second time slot proportion mode, subframe numbers and the first order information to first terminal, sends the identification number of described first time slot proportion mode, the identification number of described second time slot proportion mode, described subframe numbers and the second order information to the second terminal.

Step 603: first terminal, according to the order of described first order information instruction, adopts the first time slot proportion mode and the second time slot proportion mode successively, the subframe that described subframe numbers is corresponding carries out D2D with described second terminal and communicates; Described second terminal, according to the order of described second order information instruction, adopts the second time slot proportion mode and the first time slot proportion mode successively, the subframe that described subframe numbers is corresponding carries out D2D with described first terminal and communicates.

In the embodiment of the present invention nine, base station is by first, two time slot proportion modes and subframe numbers all send to first terminal and the second terminal, in addition, return first terminal and have sent the first order information, the second order information is have sent to the second terminal, like this, can make terminal after receiving described resource information, correct time slot proportion mode is selected to carry out D2D communication according to the instruction of benchmark, and, subframe corresponding to subframe numbers in the program is consistent with the situation in embodiment five, D2D communication mode is consistent, thus, also terminal can be made to receive, hair-like state handover operation, also just without the need to being receipts, hair-like state handover operation distributes frequency spectrum resource, when ensureing the normal execution of D2D business, avoid the waste of frequency spectrum resource.

Be described below by the scheme of concrete example to the embodiment of the present invention nine.

Example 5:

Suppose that base station is according to define in LTE TDD system 7 kinds of standard Timeslot proportioning modes, have chosen the second time slot proportion mode that the first time slot proportion mode that identification number is configuration_4 and identification number are configuration_2, shown in Figure 10, subframe numbers be 3 subframe be descending sub frame in configuration_2, be sub-frame of uplink in configuration_4.

In this example 1, base station can send resource indication information { configuration_2 to first terminal and the second terminal simultaneously, subframe3} and { configuration_4, subframe3}, and indicate in the first order information that first terminal sends and first adopt configuration_4, adopt configuration_2 again, indicate in the second order information that the second terminal sends and first adopt configuration_2, then adopt configuration_4.

In period 1: first terminal sends D2D information to the second terminal on subframe3, the second terminal receives the D2D information that first terminal sends on subframe3;

In second round: first terminal receives the D2D information that the second terminal sends on subframe3, the second terminal sends D2D information to first terminal on subframe3.

Example 6:

Base station can send resource indication information { configuration_X to first terminal and the second terminal simultaneously, subframe3, subframe4} and { configuration_Y, subframe3, subframe4}, and indicate and first adopt configuration_X in the first order information sent to first terminal, then adopt configuration_Y, indicate in the second order information that the second terminal sends and first adopt configuration_Y, then adopt configuration_X.

Within the period 1: first terminal sends D2D information to the second terminal on subframe3, subframe4; Second terminal receives the D2D information that first terminal sends on subframe3, subframe4.

Within second round: first terminal receives the D2D information that the second terminal sends on subframe3, subframe4; Second terminal sends D2D information to the second terminal on subframe3, subframe4.

Corresponding to the method for D2D communication in the LTE TDD system that the embodiment of the present invention nine provides, the embodiment of the present invention ten additionally provides the base station for D2D communication in a kind of LTE TDD system.Following examples ten introduce this base station in detail.

Embodiment ten:

As shown in Figure 6, be the specific functional modules schematic diagram of base station in the embodiment of the present invention ten, mainly comprise:

Determination module 201, for choosing the identification number of the first time slot proportion mode, the identification number of the second time slot proportion mode and subframe numbers from preset time slot proportion mode set, and the first order information to determine for first terminal and be the second order information that the second terminal is determined, wherein, the transmission direction of the subframe that described subframe numbers is corresponding in the first time slot proportion mode is contrary with the transmission direction in the second time slot proportion mode.Sending module 202, for the identification number of described first time slot proportion mode that determination module 201 is chosen, the identification number of the second time slot proportion mode, described subframe numbers and the first order information send to first terminal, be used to indicate the order of described first terminal according to described first order information instruction, adopt the first time slot proportion mode and the second time slot proportion mode successively, the subframe that described subframe numbers is corresponding carries out D2D with described second terminal communicate, and, the identification number of the described first time slot proportion mode that determination module 201 is chosen, the identification number of the second time slot proportion mode, described subframe numbers and the second order information send to the second terminal, be used to indicate the order of described second terminal according to described second order information instruction, adopt the second time slot proportion mode and the first time slot proportion mode successively, the subframe that described subframe numbers is corresponding carries out D2D with described first terminal communicate.

Preferably, described sending module 202 is specifically for sending at least one subframe numbers in the one or more subframe numbers determined to described first terminal and the second terminal.

Corresponding to the method for D2D communication in the LTE TDD system that the embodiment of the present invention nine provides, the embodiment of the present invention 11 additionally provides the terminal for D2D communication in a kind of LTE TDD system.Following examples 11 introduce this terminal in detail.

Embodiment 11:

As shown in Figure 7, be the specific functional modules schematic diagram of terminal in the embodiment of the present invention 11, mainly comprise:

Receiver module 301, for receiving the identification number of the first time slot proportion mode that base station sends, the identification number of the second time slot proportion mode, subframe numbers and order information, wherein, the transmission direction of the subframe that described subframe numbers is corresponding in the first time slot proportion mode is contrary with the transmission direction in the second time slot proportion mode.

Communication module 302, for the order indicated according to described order information, adopts the first time slot proportion mode and the second time slot proportion mode successively, the subframe that described subframe numbers is corresponding carries out D2D with other-end and communicates.

Corresponding to the method for D2D communication in the LTE TDD system that the embodiment of the present invention nine provides, the embodiment of the present invention 12 additionally provides the system for D2D communication in a kind of LTE TDD system.Following examples 12 introduce this system in detail.

Embodiment 12:

As shown in Figure 8, be the specific functional modules schematic diagram of system in the embodiment of the present invention 12, mainly comprise: base station 401, first terminal 402 and the second terminal 403, wherein:

Base station 401, for sending the identification number of the first time slot proportion mode chosen in preset time slot proportion mode set, the identification number of the second time slot proportion mode, subframe numbers and the first order information to first terminal 402, the identification number of described first time slot proportion mode, the identification number of described second time slot proportion mode, described subframe numbers and the second order information is sent to the second terminal 403, wherein, the transmission direction of the subframe that described subframe numbers is corresponding in the first time slot proportion mode is contrary with the transmission direction in the second time slot proportion mode.

First terminal 402, for the order according to described first order information instruction, adopts the first time slot proportion mode and the second time slot proportion mode successively, the subframe that described subframe numbers is corresponding carries out D2D with described second terminal 403 and communicates.

Second terminal 403, for the order according to described second order information instruction, adopts the second time slot proportion mode and the first time slot proportion mode successively, the subframe that described subframe numbers is corresponding carries out D2D with described first terminal 402 and communicates.

Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.

The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.

Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

Claims

1. a method for D2D communication in LTE TDD system, it is characterized in that, described method comprises:

2. the method for claim 1, is characterized in that, described preset time slot proportion mode set comprises: the 7 kinds of standard Timeslot proportioning modes defined in LTE TDD system and/or other time slot proportion modes.

3. the method for claim 1, is characterized in that, described base station sends at least two subframe numbers to described first terminal and described second terminal, specifically comprises:

4. a method for D2D communication in LTE TDD system, it is characterized in that, described method comprises:

5. method as claimed in claim 4, it is characterized in that, described preset time slot proportion mode set comprises: the 7 kinds of standard Timeslot proportioning modes defined in LTE TDD system and/or other time slot proportion modes.

6. a base station, is characterized in that, described base station comprises:

7. base station as claimed in claim 6, is characterized in that,

Described determination module, specifically for determining 2N subframe numbers, wherein, a described 2N subframe numbers has N number of sub-frame of uplink and N number of descending sub frame in the first time slot proportion mode, in the second time slot proportion mode, also have N number of sub-frame of uplink and N number of descending sub frame, and the transmission direction of arbitrary subframe in the first time slot proportion mode is contrary with the transmission direction in the second time slot proportion mode;

8. a terminal, is characterized in that, described terminal comprises:

9. a system for D2D communication in LTE TDD system, it is characterized in that, described system comprises:

10. system as claimed in claim 9, is characterized in that,

Described base station, specifically for sending 2M subframe numbers in 2N subframe numbers determining to described first terminal and the second terminal, wherein, the subframe that a described 2N subframe numbers is corresponding has N number of sub-frame of uplink and N number of descending sub frame in the first time slot proportion mode, also N number of sub-frame of uplink and N number of descending sub frame is had in the second time slot proportion mode, and the transmission direction of arbitrary subframe in the first time slot proportion mode is contrary with the transmission direction in the second time slot proportion mode, the subframe that a described 2M subframe numbers is corresponding has M sub-frame of uplink and M descending sub frame in the first time slot proportion mode, described N and M is positive integer, and N is not less than M.

The method of D2D communication in 11. 1 kinds of LTE TDD system, it is characterized in that, described method comprises:

12. methods as claimed in claim 11, is characterized in that, described base station sends subframe numbers to described first terminal and described second terminal, specifically comprises:

Described base station determines that there is one or more subframe numbers meets: the transmission direction of the subframe that in described one or more subframe numbers, arbitrary subframe numbers is corresponding in described first time slot proportion mode is contrary with the transmission direction in described second time slot proportion mode;

The method of D2D communication in 13. 1 kinds of LTE TDD system, it is characterized in that, described method comprises:

14. 1 kinds of base stations, is characterized in that, described base station comprises:

15. base stations as claimed in claim 14, is characterized in that,

Described determination module, specifically for determining one or more subframe numbers, wherein, the transmission direction of the subframe that in described one or more subframe numbers, arbitrary subframe numbers is corresponding in described first time slot proportion mode is contrary with the transmission direction in described second time slot proportion mode;

16. 1 kinds of terminals, is characterized in that, described terminal comprises:

The system of D2D communication in 17. 1 kinds of LTE TDD system, it is characterized in that, described system comprises:

18. systems as claimed in claim 17, is characterized in that,

Described base station, specifically for sending at least one subframe numbers in the multiple subframe numbers determined to described first terminal and the second terminal, wherein, the transmission direction of the subframe that in described multiple subframe numbers, arbitrary subframe numbers is corresponding in described first time slot proportion mode is contrary with the transmission direction in described second time slot proportion mode.

The method of D2D communication in 19. 1 kinds of LTE TDD system, it is characterized in that, described method comprises:

20. methods as claimed in claim 19, is characterized in that, described base station sends subframe numbers to described first terminal and described second terminal, specifically comprises:

The method of D2D communication in 21. 1 kinds of LTE TDD system, it is characterized in that, described method comprises:

22. 1 kinds of base stations, is characterized in that, described base station comprises:

Sending module, for the identification number of described first time slot proportion mode that determination module is chosen, the identification number of the second time slot proportion mode, described subframe numbers and the first order information send to first terminal, be used to indicate the order of described first terminal according to described first order information instruction, adopt the first time slot proportion mode and the second time slot proportion mode successively, the subframe that described subframe numbers is corresponding carries out D2D with described second terminal communicate, and, the identification number of the described first time slot proportion mode that determination module is chosen, the identification number of the second time slot proportion mode, described subframe numbers and the second order information send to the second terminal, be used to indicate the order of described second terminal according to described second order information instruction, adopt the second time slot proportion mode and the first time slot proportion mode successively, the subframe that described subframe numbers is corresponding carries out D2D with described first terminal communicate.

23. base stations as claimed in claim 22, is characterized in that,

24. 1 kinds of terminals, is characterized in that, described terminal comprises:

The system of D2D communication in 25. 1 kinds of LTE TDD system, it is characterized in that, described system comprises:

26. systems as claimed in claim 25, is characterized in that,

Described base station, specifically for sending at least one subframe numbers in the one or more subframe numbers determined to described first terminal and the second terminal, wherein, the transmission direction of the subframe that in described one or more subframe numbers, arbitrary subframe numbers is corresponding in described first time slot proportion mode is contrary with the transmission direction in described second time slot proportion mode.