CN103987026A - Device-to-device communication data transmission method and system, and UE - Google Patents
Device-to-device communication data transmission method and system, and UE Download PDFInfo
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Abstract
The invention discloses a device-to-device (D2D) communication data transmission method which includes that UE carries out independent data transmission respectively on two time slots of a D2D subframe, wherein the data transmission includes data transmission and/or data reception. The invention also discloses a D2D communication data transmission system and the UE at the same time. The device-to-device (D2D) communication data transmission method is capable of enabling the UE to carry out efficient D2D communication data transmission and/or cellular communication data transmission through effective division of D2D communication resources so that the resource utilization rate is improved.
Description
Technical field
The present invention relates to the data transmission technology in moving communicating field, relate in particular to a kind of device-to-device (Device-to-Device, D2D) communication data transmission method, system and subscriber equipment (User Equipment, UE).
Background technology
At present, in cellular communication system, in the time needing service data transmission between two UE, as first: UE1 can pass through air interface to the business datum of UE2 transmission, abbreviation is eated dishes without rice or wine, and is transferred to base station 1, base station 1 by core net by this business data transmission to base station 2; Base station 2 is transferred to above-mentioned business datum UE2 again by eating dishes without rice or wine, UE2 adopts similar handling process to the transmission of the business datum of UE1.In the time that UE1 and UE2 are positioned at same cellular cell, as shown in Figure 1, although base station 1 and base station 2 are same website, a data transfer still can consume two parts of radio spectrum resources.
As can be seen here, if UE1 and UE2 are positioned at same community and at a distance of nearer, so above-mentioned cellular communication method is not obviously optimum communication mode.But, for example, along with the diversified development of mobile communication business: the application in wireless communication system such as social networks, E-Payment is more and more extensive, make closely the transmission of the business between user demand growing.Therefore, D2D communication pattern is subject to extensive concern day by day.So-called D2D communication, as shown in Figure 2, refers to that business datum does not need to forward through base station, but is directly transferred to object UE by eating dishes without rice or wine by source UE.Visible, this communication pattern has obvious distinguishing characteristics compared with traditional cellular communication system communication pattern.For the user of short-range communication, radio spectrum resources has not only been saved in D2D transmission, and can reduce the transfer of data pressure of core net.
In conventional cellular communication system, as shown in Figure 3, each radio frames is 10ms to subframe structure, comprises 10 subframes.Described each subframe is 1ms, is divided into 2 time slots (slot) of 0.5ms, is respectively slot#0 and slot#1.Further, Cyclic Prefix (the Cyclic Prefix adopting according to system, CP) difference, single-carrier frequency division multiple access (the Signal-Carrier Frequency Division Multiple Access that each subframe comprises, SC-FDMA) the number difference of symbol, specifically be divided into two classes: when system adopts general cyclic prefix (Normal Cyclic Prefix, Normal CP) time, each subframe contains 14 SC-FDMA symbols, on each slot, comprise 7 SC-FDMA symbols, be designated as symbol #0 to symbol #13; In the time that system adopts extended cyclic prefix (Extended Cyclic Prefix, Extend CP), every subframe contains 12 SC-FDMA symbols, comprises 6 SC-FDMA symbols on each slot, is designated as symbol #0 to symbol #11.
For the UE that supports D2D communication mode, it not only carries out simple cellular communication or D2D communication, but in the state that may communicate by letter with D2D in cellular communication, that is: when UE keeps cellular communication with base station, also keep D2D to be connected with other UE, and carry out transfer of data simultaneously.Here, two UE that carry out D2D communication are called to D2D UE to (D2D UE pair), each UE is called D2D Correspondent Node UE with respect to another UE.Visible, D2D communication based on cellular communications networks is a kind of under the control of system, the new technology directly communicating between the terminal equipment of multiple support D2D functions, it can not only reduce system resource and take, improve frequency spectrum efficiency of cellular communication system, and can reduce terminal transmitting power consumption, and can also save to a great extent network operation cost.
Therefore,, between described cellular communication and two kinds of communication patterns of D2D communication, how the UE of support D2D communication mode carries out active data transmission is to have problem to be solved.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of D2D communication data transmission method, system and UE, by effective division D2D communication resource, can make UE carry out efficient D2D communication data transmission and/or cellular communication transfer of data, improve resource utilization.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of device-to-device D2D communication data transmission method, the method comprises:
User equipment (UE) carries out respectively independently transfer of data on two slot s lot of D2D subframe subframe; Described transfer of data comprises: the transmitting of data and/or the reception of data.
Wherein, described D2D subframe is that network side configures the subframe for D2D communication to UE; Or, the subframe for D2D communication obtaining by competition for UE.
Wherein, described network side comprises one or more in following entity: evolved base station eNB, cell cooperative entity MCE, gateway GW, mobility management apparatus MME, Evolved UTRAN EUTRAN, operational administrative and safeguards OAM manager.
Wherein, carrying D2D communication data on described D2D subframe; Or, carry D2D communication data and cellular communication data simultaneously.
In such scheme, described UE carries out respectively independently transfer of data on two slot of D2D subframe, for:
UE transmits on slot#0, receives signal on slot#1; Or,
UE receives signal on slot#0, on slot#1, transmits; Or,
UE transmits to different nodes respectively on slot#0 and slot#1; Or,
UE receives respectively the signal from different nodes on slot#0 and slot#1.
Wherein, described signaling bearer D2D communication data or cellular communication data.
Wherein, described D2D communication data comprises: the D2D between UE and D2D Correspondent Node UE controls data and/or D2D business datum;
Described cellular communication data comprise: the cellular communication control data between UE and network side and/or cellular communication service data.
Wherein, described node comprises: D2D Correspondent Node UE and/or network side.
In such scheme, described UE transmits on slot#0, for:
In the time that system adopts general cyclic prefix Normal CP, UE at symbol #0 to symbol #6 or symbol #1 to symbol #6 or symbol #0 to symbol #5, transmit to symbol #5 or symbol #1; In the time that system adopts extended cyclic prefix Extend CP, UE at symbol #0 to symbol #5 or symbol #1 to symbol #5 or symbol #0 to symbol #4, transmit to symbol #4 or symbol #1.
In such scheme, described UE transmits on slot#1, for:
In the time that system adopts Normal CP, UE at symbol #7 to symbol #13 or symbol #8 to symbol #13 or symbol #7 to symbol #12, transmit to symbol #12 or symbol #8; In the time that system adopts Extend CP, UE at symbol #6 to symbol #11 or symbol #7 to symbol #11 or symbol #6 to symbol #10, transmit to symbol #10 or symbol #7.
In such scheme, described UE receives signal on slot#0, for:
In the time that system adopts Normal CP, UE at symbol #0 to symbol #6 or symbol #1 to symbol #6 or symbol #0 to symbol #5, receive signal to symbol #5 or symbol #1; In the time that system adopts Extend CP, UE at symbol #0 to symbol #5 or symbol #1 to symbol #5 or symbol #0 to symbol #4, receive signal to symbol #4 or symbol #1.
In such scheme, described UE receives signal on slot#1, for:
In the time that system adopts Normal CP, UE at symbol #7 to symbol #13 or symbol #8 to symbol #13 or symbol #7 to symbol #12, receive signal to symbol #12 or symbol #8; In the time that system adopts Extend CP, UE at symbol #6 to symbol #11 or symbol #7 to symbol #11 or symbol #6 to symbol #10, receive signal to symbol #10 or symbol #7.
Further, the method also comprises:
Described UE transmits on all or part of Physical Resource Block PRB of slot#0 or slot#1, wherein, the PRB using when described all or part of PRB is configured or obtained by competition by UE or receive signal for UE on slot#1 or slot#0 by network side.
The method also comprises:
Described UE receives signal on all or part of PRB of slot#1 or slot#0, wherein, and the PRB that described all or part of PRB uses when obtaining or transmit on slot#0 or slot#1 for UE by network side configuration or by UE competition.
The present invention also provides a kind of D2D communication data transmission system, and this system comprises UE, for carry out respectively independently transfer of data on two slot of D2D subframe; Described transfer of data comprises: the transmitting of data and/or the reception of data.
Further, described UE specifically for transmitting on slot#0, receives signal on slot#1; Or, on slot#0, receive signal, on slot#1, transmit; Or, on slot#0 and slot#1, transmit to different nodes respectively; Or, on slot#0 and slot#1, receive respectively the signal from different nodes;
Wherein, described signaling bearer D2D communication data or cellular communication data.
Described UE further comprises: data transmission module and data reception module; Wherein,
Described data transmission module, for transmitting on slot#0; Or, on slot#1, transmit; Or, on slot#0 and slot#1, transmit to different nodes respectively;
Described data reception module, for receiving signal on slot#1; Or, the upper reception of slot#0 signal; Or, on slot#0 and slot#1, receive respectively the signal from different nodes.
Wherein, described data transmission module, also for transmitting on all or part of Physical Resource Block PRB of slot#0 or slot#1, wherein, the PRB using when described all or part of PRB is configured or obtained by competition by UE or receive signal for UE on slot#1 or slot#0 by network side.
Wherein, described data reception module, also for receive signal on all or part of PRB of slot#1 or slot#0, wherein, the PRB that described all or part of PRB uses when obtaining or transmit on slot#0 or slot#1 for UE by network side configuration or by UE competition.
Further, this system also comprises: D2D Correspondent Node UE and network side, be respectively used to carry out and described UE between transfer of data.
The present invention also provides a kind of UE, and described UE is the UE described in any one in claim 15 to 19.
D2D communication data transmission method provided by the invention, system and UE, UE carries out respectively independently transfer of data on two slot of D2D subframe; Wherein, described transfer of data comprises: the transmitting of data and/or the reception of data.The present invention is by effectively dividing the D2D communication resource, not only can realize the transmission of D2D communication data, and, when in the state that UE communicates by letter with D2D in cellular communication simultaneously, can on two of a D2D subframe slot, transmit respectively D2D communication data and cellular communication data, can save to a great extent network operation cost.Visible, the present invention can make UE carry out efficient D2D communication data transmission and/or cellular communication transfer of data, improves resource utilization.
Brief description of the drawings
Fig. 1 is existing cellular communication system data transfer mode schematic diagram;
Fig. 2 is D2D communication data transmission means schematic diagram;
Fig. 3 is existing cellular communication system frame structure schematic diagram;
Fig. 4 is the resource division mode schematic diagram that in the embodiment of the present invention, cellular communication is communicated by letter with D2D;
Fig. 5 is the transmitting/receiving view of UE in D2D subframe in the embodiment of the present invention;
Fig. 6 is the significant character schematic diagram that in the embodiment of the present invention, UE launches on slot#0;
Fig. 7 is the significant character schematic diagram that in the embodiment of the present invention, UE launches on slot#1;
Fig. 8 is the significant character schematic diagram that in the embodiment of the present invention, UE receives on slot#0;
Fig. 9 is the significant character schematic diagram that in the embodiment of the present invention, UE receives on slot#1;
Figure 10 is the resource division schematic diagram of UE in D2D dedicated frequency band in the embodiment of the present invention one;
Figure 11 is the D2D resource division schematic diagram that in the embodiment of the present invention two, UE obtains by competition;
Figure 12 is D2D resource division schematic diagram in the embodiment of the present invention three;
Figure 13 is D2D resource division schematic diagram in the embodiment of the present invention four;
Figure 14 is D2D resource division schematic diagram in the embodiment of the present invention five;
Figure 15 is D2D resource division schematic diagram in the embodiment of the present invention six;
Figure 16 is D2D resource division schematic diagram in the embodiment of the present invention seven.
Embodiment
Basic thought of the present invention is: UE carries out respectively independently transfer of data on two time slots (slot) of D2D subframe (subframe); Described transfer of data comprises: the transmitting of data and/or the reception of data.
In the present invention, described UE is the UE that supports D2D communication mode; Described data comprise: control data and/or business datum, described control data comprise configuration information, schedule information, HARQ feedback, measurement report, resource request etc.
Be example taking base station as the configuration controlled entity of network side below, and the present invention will be described in conjunction with the drawings and the specific embodiments.
In D2D communication, two or more UE carry out the transmission of data under the control of base station, and described data transfer operation comprises: the data between UE and base station receive/send out operation, with D2D Correspondent Node UE1/UE2/UE3 ... data receive/send out operation etc.Easy in order to describe, example below describes as an example of the D2DPair of two UE composition example, described UE can be operated in cellular communication and communicate by letter with D2D under two kinds of patterns, and UE may carry out simultaneously and base station between cellular communication, and communicate by letter with the D2D between D2D Correspondent Node UE.UE realizes according to being configured in different resources the Deta bearer that cellular communication is communicated by letter with D2D, and concrete methods of realizing is as follows:
Resource division between communicating by letter for cellular communication and D2D, can carry out from time domain and two dimensions of frequency domain, as shown in Figure 4, while division from time domain, subframe can be divided into cellular communication subframe (Macro subframe) and D2D subframe (subframe), as shown in Figure 4 (a); While division from frequency domain, can be undertaken by Physical Resource Block (PRB), the whole PRB in system available bandwidth are divided into two classes, comprise: for the PRB of cellular communication and the PRB communicating by letter for D2D, as shown in Figure 4 (b); In addition, also can be by the two combination, adopt the mode of time domain+frequency domain to divide, as shown in Figure 4 (c), in D2D subframe, Further Division goes out part PRB as D2D resource.In summary, described resource comprises frequency domain resource and/or time-domain resource.
Here, described D2D subframe and D2D PRB resource can configure the subframe for D2D communication to UE by network side, the subframe for D2D communication that also can be obtained by competitive resource according to system specifications by UE; Wherein, described network side comprises one or more in following entity: evolved base station (eNB), cell cooperative entity (MCE), gateway (GW), mobility management apparatus (MME), Evolved UTRAN (EUTRAN), operational administrative and safeguard (OAM) manager.In addition, on described D2D subframe, UE can carry cellular communication data in part resource, that is: the transfer of data of existing D2D communication on D2D subframe also may have the transfer of data of cellular communication.
The implementation method of the embodiment of the present invention is: UE carries out respectively independently transfer of data on two time slots (slot) of D2D subframe; Described transfer of data comprises: the transmitting of data and/or the reception of data;
Concrete, described UE carries out respectively independently signal transmitting or receives on slot#0 and two time slots of slot#1, comprises following situation: UE transmits on slot#0, receives signal, on slot#1 as shown in Fig. 5 (a); Or UE receives signal on slot#0, on slot#1, transmit, as shown in Fig. 5 (b); Or UE transmits to different nodes respectively on slot#0 and slot#1, as shown in Fig. 5 (c); Or UE receives respectively the signal from different nodes on slot#0 and slot#1, as shown in Fig. 5 (d).Wherein, described signaling bearer D2D communication data and/or cellular communication data; Described node comprises: D2D Correspondent Node UE and/or network side.In Fig. 5, shown in
with
region representation UE is in the state of transmitting, shown in
with
region representation UE is in receiving state signal.
In the present invention, on described D2D subframe, can carry D2D communication data; Or, carry D2D communication data and cellular communication data simultaneously.Wherein, described D2D communication data comprises: the D2D between UE and D2D Correspondent Node UE controls data and/or D2D business datum; Described cellular communication data comprise: the cellular communication control data between UE and network side and/or cellular communication service data.
Described UE transmits on all or part of PRB of slot#0 or slot#1, wherein, and the PRB that described all or part of PRB uses when obtaining or receive signal for UE on slot#1 or slot#0 by network side configuration or by UE competition; Or,
Described UE receives signal on all or part of PRB of slot#1 or slot#0, wherein, and the PRB that described all or part of PRB uses when obtaining or transmit on slot#0 or slot#1 for UE by network side configuration or by UE competition.
Further, in the time that UE carries out the conversion of transmitting/receiving state on D2D subframe, may need certain state conversion time; In addition, the subframe of UE before D2D subframe may be different from transmitting or accepting state on D2Dsubframe, therefore also may need to carry out the conversion of state.Be subject to the impact of above-mentioned two factors, UE may be less than at the effective transmitting of reality or the receiving symbol number of D2D subframe the symbolic number that single time slot comprises, therefore:
When UE transmits on slot#0, and in the time that system adopts Normal CP, UE at symbol #0 to symbol #6 or symbol #1 to symbol #6 or symbol #0 to symbol #5, transmit to symbol #5 or symbol #1; In the time that system adopts Extend CP, UE at symbol #0 to symbol #5 or symbol #1 to symbol #5 or symbol #0 to symbol #4, transmit to symbol #4 or symbol #1, as shown in Figure 6, shown in
region representation is effectively launched symbol.
When UE transmits on slot#1, and in the time that system adopts Normal CP, UE at symbol #7 to symbol #13 or symbol #8 to symbol #13 or symbol #7 to symbol #12, transmit to symbol #12 or symbol #8; In the time that system adopts Extend CP, UE at symbol #6 to symbol #11 or symbol #7 to symbol #11 or symbol #6 to symbol #10, transmit to symbol #10 or symbol #7, as shown in Figure 7, shown in
region representation is effectively launched symbol.
When UE receives signal on slot#0, and in the time that system adopts Normal CP, UE at symbol #0 to symbol #6 or symbol #1 to symbol #6 or symbol #0 to symbol #5, receive signal to symbol #5 or symbol #1; In the time that system adopts Extend CP, UE at symbol #0 to symbol #5 or symbol #1 to symbol #5 or symbol #0 to symbol #4, receive signal to symbol #4 or symbol #1, as shown in Figure 8, shown in
the effective receiving symbol of region representation.
When UE receives signal on slot#1, and in the time that system adopts Normal CP, UE at symbol #7 to symbol #13 or symbol #8 to symbol #13 or symbol #7 to symbol #12, receive signal to symbol #12 or symbol #8; In the time that system adopts Extend CP, UE at symbol #6 to symbol #11 or symbol #7 to symbol #11 or symbol #6 to symbol #10, receive signal to symbol #10 or symbol #7, as shown in Figure 9, shown in
the effective receiving symbol of region representation.
Below in conjunction with specific embodiment, the present invention is described in further detail.
Embodiment mono-
The present embodiment is at network side, and as eNB configures on the D2D subframe to UE, described UE carries out with D2D Correspondent Node UE1 the transmitted in both directions that D2D communicates by letter, and on slot#0, UE is to the signal of UE1 transmitting carrying D2D communication data; On slot#1, UE receives the signal that is carrying D2D communication data from UE1.
Further, in the time that D2D communication is used the dedicated frequency band of system configuration, described UE uses the whole PRB carrying D2D business datums in dedicated frequency band on slot#0, and launches to UE1; UE receives the signal that comprises whole PRB from UE1 on slot#1, is wherein carrying UE1 and issue the D2D business datum of UE, as shown in Figure 10 (a) shows.
Or further, in the time that D2D communication is used the dedicated frequency band of system configuration, described UE uses the whole PRB carrying D2D business datums in dedicated frequency band on slot#0, and launches to UE1; UE receives the signal that comprises the part PRB in dedicated frequency band from UE1 on slot#1, and wherein carry the D2D that UE1 issues UE and controlling data, for example: the report of D2D business datum receiving feedback information and/or D2D channel measurement, as shown in Figure 10 (b).
Or further, in the time that D2D communication is used the dedicated frequency band of system configuration, described UE uses the part PRB carrying D2D in dedicated frequency band to control data on slot#0, and launches to UE1; UE receives the signal that comprises the whole PRB in dedicated frequency band from UE1 on slot#1, is wherein carrying UE1 and issue the D2D business datum of UE, as shown in Figure 10 (c).
In Figure 10, shown in
region representation UE is in the state of transmitting, shown in
region representation UE is in receiving state signal.
Embodiment bis-
The present embodiment UE obtains certain D2D subframe resource by other D2D UE pair competitions that are adjacent, on this D2D subframe, UE carries out with D2D Correspondent Node UE1 the transmitted in both directions that D2D communicates by letter, on slot#0, UE receives the signal that is carrying D2D communication data from UE1, on slot#1, UE is to the signal of UE1 transmitting carrying D2D communication data.
Further, on D2D subframe, D2D communication data signaling bearer is on the PRB obtaining by competition, and UE, on slot#0, and receives from the signal that is carrying D2D business datum of UE1 on the PRB obtaining in competition; UE carries D2D business datum on the above-mentioned PRB of slot#1, and to UE1 transmitting, as shown in Figure 11 (a) shows.
Or further, on D2D subframe, UE, on slot#0, and receives the signal that is carrying D2D business datum from UE1 on the PRB obtaining in competition; UE uses pre-configured PRB to control data-signal to UE1 transmitting D2D on slot#1, is wherein carrying UE and issue the D2D business datum receiving feedback information of UE1, as shown in Figure 11 (b).
Or, further, on D2D subframe, D2D communication data signaling bearer is on the PRB obtaining by competition, on the pre-configured PRB of UE on slot#0, receive from the D2D that carrying of UE1 and control the signal of data, the report about D2D channel measurement of wherein carrying UE1 and issuing UE; UE, on slot#1, and carries D2D business datum on the PRB obtaining in competition, and to UE1 transmitting, as shown in Figure 11 (c).
In Figure 11, shown in
region representation UE is in the state of transmitting, shown in
region representation UE is in receiving state signal.
Embodiment tri-
In the present embodiment, at network side, as eNB configures on the D2D subframe to UE, described UE carries out the transmission of D2D communication data to D2D Correspondent Node UE1, and carries out the transmission of cellular communication data.On slot#0, UE is to the signal of UE1 transmitting carrying D2D communication data, and on slot#1, UE is to the signal of eNB transmitting carrying cellular communication data.
Further, on D2D subframe, UE uses the PRB for D2D communication of eNB configuration on slot#0, and carrying D2D business datum is launched to UE1; UE uses the PRB for cellular communication of eNB configuration on slot#1, carrying cellular communication service data, and to eNB transmitting, as shown in figure 12, shown in
represent UE transmitting D2D signal of communication, shown in
represent UE transmitting cellular communication signal.
Embodiment tetra-
In this enforcement, configure on the D2D subframe to UE at eNB, described UE receives the D2D communication data signal of D2D Correspondent Node UE1 transmitting, and receives the cellular communication data-signal of eNB.On slot#0, UE receives the signal that is carrying cellular communication data from eNB; On slot#1, UE receives the signal that is carrying D2D communication data from UE1.
Further, on D2D subframe, UE receives the control data-signal of eNB in the pre-configured resource of slot#0, wherein comprises the control data of the cellular communication to UE and the schedule information of D2D communication; UE, at the PRB for D2D communication of the eNB of slot#1 configuration, receives the D2D communication data signal of UE1, has wherein comprised D2D business datum, as shown in figure 13, shown in
represent that UE receives cellular communication signal, shown in
represent that UE receives D2D signal of communication.
Embodiment five
In the present embodiment, D2D communication and cellular communication adopt the mode of frequency division to divide resource, be configured on the frequency band of D2D communication, on a slot of the D2D subframe that UE obtains in competition, taking whole PRB of D2D frequency band to D2D Correspondent Node UE1 transmitting D2D communication data signal; On another slot, receive whole PRB of D2D frequency band, wherein carrying the D2D communication data signal from UE1.For example: on slot#0, UE is to the signal of UE1 transmitting carrying D2D communication data; On slot#1, UE receives the signal that is carrying D2D communication data from UE1.
Here,, in same subframe, UE launches on first slot, on second slot, be converted to reception, described UE needs certain change-over time from emission state to accepting state, between slot#0 and slot#1, and Gap change-over time that UE need to be from emission state to accepting state.Describe as an example of system employing Normal CP example, UE carries out the transmitting of signal on slot#0, and carry out state conversion on last symbol of slot#0, and the symbol #6 on slot#0 can not carry data as Gap, and effective transmitting symbol of UE comprises that symbol #0 is to symbol #5; On slot#1, UE carries out the reception of data, and symbol #7 is effective receiving symbol to symbol #13, as shown in figure 14, shown in
region representation is effectively launched symbol, shown in
region representation Gap,
the effective receiving symbol of region representation.
Embodiment six
In the present embodiment, D2D communication and cellular communication adopt the mode of time-division to divide resource, and on the D2D subframe of configuration, UE is to two D2D Correspondent Node UE1, UE2 transmitting D2D communication data signals, on slot#0, UE is to the signal of UE1 transmitting carrying D2D communication data; On slot#1, UE is to the signal of UE2 transmitting carrying D2D communication data.
Here,, due to D2D communication and the mode of cellular communication employing time-division, the previous subframe of current D2D subfame and a rear subframe are cellular communication subframe, and in cellular communication subframe, UE need remain on accepting state.Therefore, described UE will carry out the conversion from accepting state to emission state in D2D subframe, and from emission state to the conversion that receives shape.Therefore, first symbol of slot#0 and last symbol of slot#1 need be served as Gap, can not carry D2D communication data.Describe as an example of system employing Extend CP example, UE carries out the transmitting of signal on slot#0, and wherein, symbol #0, as Gap, effectively launches symbol and comprises that symbol #1 is to symbol #5; On slot#1, symbol #11, as Gap, effectively launches symbol and comprises that symbol #6 is to symbol #10, as shown in figure 15, shown in
region representation is effectively launched symbol, shown in
region representation Gap.
Embodiment seven
In the present embodiment, D2D communication and cellular communication adopt the mode of frequency division+time-division to divide resource, on the D2D subframe and PRB resource of configuration, UE and D2D Correspondent Node UE1 transmission D2D communication data signal, in the time that D2D communication data demand is asymmetric, can on idle slot, launch cellular communication data-signal.
For example: UE is on the PRB that is configured to D2D resource of the D2D subframe slot#0 of eNB configuration, receive the D2D communication data signal from UE1, because the D2D communication data demand between UE and UE1 is asymmetric, UE only receives the D2D communication data of UE1, and do not send data to UE1, therefore, on current D2D subframe, UE can use slot#1 to eNB transmitting cellular communication data-signal, and the cellular communication Data Concurrent carrying between UE and eNB on the Macro PRB for cellular communication of eNB configuration is penetrated.
Here, in same subframe, UE receives on slot#0, is converted to transmitting on slot#1, and UE needs certain change-over time from accepting state to emission state, between slot#0 and slot#1, UE need to be from accepting state to emission state Gap change-over time, described Gap can be set to last symbol of slot#0, as shown in Figure 16 (a), or Gap also can be set to first symbol of slot#1, as shown in Figure 16 (b).
Further, when system is supported D2D communication at uplink band, and in the previous subframe of current D2D subframe, when UE and eNB have cellular communication transfer of data, UE, finishing previous cellular communication subframe after the signal transmitting of eNB, need to be converted to accepting state, thereby receives the D2D signal on D2D subframe slot#0, therefore first symbol #0 of D2D subframe slot#0 arrives the conversion Gap of accepting state as emission state, as shown in Figure 16 (a) and (b).Describe as an example of Normal CP example, UE is first converted to accepting state at slot#0 from emission state, and receive the D2D signal of UE1, carry out the conversion of accepting state to emission state at the symbol #6 of slot#0 or the symbol #7 of slot#1, and launch the data-signal of cellular communication at slot#1 to eNB.Situation shown in Figure 16 (a), effective receiving symbol of UE be symbol #1 to symbol #5, effectively launching symbol is that symbol #7 is to symbol #13; Situation shown in Figure 16 (b), effective receiving symbol of UE be symbol #1 to symbol #6, effectively launching symbol is that symbol #8 is to symbol #13.
In Figure 16, shown in
the effective D2D communications reception of region representation symbol, shown in
region representation Gap, shown in
the effective cellular communication transmitting of region representation symbol.
The present invention also provides a kind of D2D communication data transmission system, and this system comprises UE; Described UE, for carrying out respectively independently transfer of data on two slot of D2D subframe; Described transfer of data comprises: the transmitting of data and/or the reception of data.
Further, described UE specifically for transmitting on slot#0, receives signal on slot#1; Or, on slot#0, receive signal, on slot#1, transmit; Or, on slot#0 and slot#1, transmit to different nodes respectively; Or, on slot#0 and slot#1, receive respectively the signal from different nodes; Wherein, described signaling bearer D2D communication data or cellular communication data.
Accordingly, described UE further comprises: data transmission module and data reception module; Wherein,
Described data transmission module, for transmitting on slot#0; Or, on slot#1, transmit; Or, on slot#0 and slot#1, transmit to different nodes respectively;
Described data reception module, for receiving signal on slot#1; Or, the upper reception of slot#0 signal; Or, on slot#0 and slot#1, receive respectively the signal from different nodes.
Further, described data transmission module, also for transmitting on all or part of Physical Resource Block PRB of slot#0 or slot#1, wherein, the PRB using when described all or part of PRB is configured or obtained by competition by UE or receive signal for UE on slot#1 or slot#0 by network side.
Further, described data reception module, also for receive signal on all or part of PRB of slot#1 or slot#0, wherein, the PRB that described all or part of PRB uses when obtaining or transmit on slot#0 or slot#1 for UE by network side configuration or by UE competition.
This system also comprises: D2D Correspondent Node UE and network side, be respectively used to carry out and described UE between transfer of data.
Wherein, described network side comprises one or more in following entity: eNB, MCE, GW, MME, EUTRAN, OAM manager.
The present invention also provides a kind of UE, and described UE is the UE in D2D communication data transmission system mentioned above.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.
Claims (21)
1. a device-to-device D2D communication data transmission method, is characterized in that, the method comprises:
User equipment (UE) carries out respectively independently transfer of data on two slot s lot of D2D subframe subframe; Described transfer of data comprises: the transmitting of data and/or the reception of data.
2. D2D communication data transmission method according to claim 1, is characterized in that, described D2Dsubframe is that network side configures the subframe for D2D communication to UE; Or, the subframe for D2D communication obtaining by competition for UE.
3. D2D communication data transmission method according to claim 2, it is characterized in that, described network side comprises one or more in following entity: evolved base station eNB, cell cooperative entity MCE, gateway GW, mobility management apparatus MME, Evolved UTRAN EUTRAN, operational administrative and safeguards OAM manager.
4. D2D communication data transmission method according to claim 1, is characterized in that, the upper carrying of described D2Dsubframe D2D communication data; Or, carry D2D communication data and cellular communication data simultaneously.
5. according to the D2D communication data transmission method described in claim 1,2,3 or 4, it is characterized in that, described UE carries out respectively independently transfer of data on two slot of D2D subframe, for:
UE transmits on slot#0, receives signal on slot#1; Or,
UE receives signal on slot#0, on slot#1, transmits; Or,
UE transmits to different nodes respectively on slot#0 and slot#1; Or,
UE receives respectively the signal from different nodes on slot#0 and slot#1.
6. D2D communication data transmission method according to claim 5, is characterized in that, described signaling bearer D2D communication data or cellular communication data.
7. D2D communication data transmission method according to claim 6, is characterized in that, described D2D communication data comprises: the D2D between UE and D2D Correspondent Node UE controls data and/or D2D business datum;
Described cellular communication data comprise: the cellular communication control data between UE and network side and/or cellular communication service data.
8. D2D communication data transmission method according to claim 5, is characterized in that, described node comprises: D2D Correspondent Node UE and/or network side.
9. D2D communication data transmission method according to claim 5, is characterized in that, described UE transmits on slot#0, for:
In the time that system adopts general cyclic prefix Normal CP, UE at symbol #0 to symbol #6 or symbol #1 to symbol #6 or symbol #0 to symbol #5, transmit to symbol #5 or symbol #1; In the time that system adopts extended cyclic prefix Extend CP, UE at symbol #0 to symbol #5 or symbol #1 to symbol #5 or symbol #0 to symbol #4, transmit to symbol #4 or symbol #1.
10. D2D communication data transmission method according to claim 5, is characterized in that, described UE transmits on slot#1, for:
In the time that system adopts Normal CP, UE at symbol #7 to symbol #13 or symbol #8 to symbol #13 or symbol #7 to symbol #12, transmit to symbol #12 or symbol #8; In the time that system adopts Extend CP, UE at symbol #6 to symbol #11 or symbol #7 to symbol #11 or symbol #6 to symbol #10, transmit to symbol #10 or symbol #7.
11. D2D communication data transmission methods according to claim 5, is characterized in that, described UE receives signal on slot#0, for:
In the time that system adopts Normal CP, UE at symbol #0 to symbol #6 or symbol #1 to symbol #6 or symbol #0 to symbol #5, receive signal to symbol #5 or symbol #1; In the time that system adopts Extend CP, UE at symbol #0 to symbol #5 or symbol #1 to symbol #5 or symbol #0 to symbol #4, receive signal to symbol #4 or symbol #1.
12. D2D communication data transmission methods according to claim 5, is characterized in that, described UE receives signal on slot#1, for:
In the time that system adopts Normal CP, UE at symbol #7 to symbol #13 or symbol #8 to symbol #13 or symbol #7 to symbol #12, receive signal to symbol #12 or symbol #8; In the time that system adopts Extend CP, UE at symbol #6 to symbol #11 or symbol #7 to symbol #11 or symbol #6 to symbol #10, receive signal to symbol #10 or symbol #7.
13. D2D communication data transmission methods according to claim 5, is characterized in that, the method also comprises:
Described UE transmits on all or part of Physical Resource Block PRB of slot#0 or slot#1, wherein, the PRB using when described all or part of PRB is configured or obtained by competition by UE or receive signal for UE on slot#1 or slot#0 by network side.
14. D2D communication data transmission methods according to claim 5, is characterized in that, the method also comprises:
Described UE receives signal on all or part of PRB of slot#1 or slot#0, wherein, and the PRB that described all or part of PRB uses when obtaining or transmit on slot#0 or slot#1 for UE by network side configuration or by UE competition.
15. 1 kinds of D2D communication data transmission systems, is characterized in that, this system comprises UE, for carry out respectively independently transfer of data on two slot of D2D subframe; Described transfer of data comprises: the transmitting of data and/or the reception of data.
16. D2D communication data transmission systems according to claim 15, is characterized in that described UE, specifically for transmitting on slot#0, receives signal on slot#1; Or, on slot#0, receive signal, on slot#1, transmit; Or, on slot#0 and slot#1, transmit to different nodes respectively; Or, on slot#0 and slot#1, receive respectively the signal from different nodes;
Wherein, described signaling bearer D2D communication data or cellular communication data.
17. D2D communication data transmission systems according to claim 16, is characterized in that, described UE further comprises: data transmission module and data reception module; Wherein,
Described data transmission module, for transmitting on slot#0; Or, on slot#1, transmit; Or, on slot#0 and slot#1, transmit to different nodes respectively;
Described data reception module, for receiving signal on slot#1; Or, the upper reception of slot#0 signal; Or, on slot#0 and slot#1, receive respectively the signal from different nodes.
18. D2D communication data transmission systems according to claim 17, it is characterized in that, described data transmission module, also for transmitting on all or part of Physical Resource Block PRB of slot#0 or slot#1, wherein, the PRB using when described all or part of PRB is configured or obtained by competition by UE or receive signal for UE on slot#1 or slot#0 by network side.
19. D2D communication data transmission systems according to claim 17, it is characterized in that, described data reception module, also for receive signal on all or part of PRB of slot#1 or slot#0, wherein, the PRB using when described all or part of PRB obtains or transmits on slot#0 or slot#1 for UE by network side configuration or by UE competition.
20. according to claim 15 to the D2D communication data transmission system described in any one in 19, it is characterized in that, this system also comprises: D2D Correspondent Node UE and network side, be respectively used to carry out and described UE between transfer of data.
21. 1 kinds of UE, is characterized in that, described UE is the U E described in any one in claim 15 to 19.
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| CN201310049663.8A CN103987026B (en) | 2013-02-07 | 2013-02-07 | A kind of device-to-device communication data transmission method, system and user equipment |
| PCT/CN2014/070585 WO2014121679A1 (en) | 2013-02-07 | 2014-01-14 | Device-to-device communication data transmission method, system, and user equipment |
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| US9735926B2 (en) * | 2014-08-26 | 2017-08-15 | Lg Electronics Inc. | Method and apparatus for data transmission of device-to-device user equipment in wireless communication system |
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| CN103987026B (en) | 2019-12-03 |
| WO2014121679A1 (en) | 2014-08-14 |
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