CN104219023A - Method and device of communication in D2D (Device to Device) system - Google Patents
Method and device of communication in D2D (Device to Device) system Download PDFInfo
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Abstract
The invention provides a method of communication in a D2D (Device to Device) system. In an embodiment, the method comprises the following steps that UE (User Equipment) receives data at some symbols of one sub-frame and sends feedback at other symbols of the sub-frame. Through utilizing the technical scheme provided by the invention, the problem of reduction of transmission efficiency caused by feedback in the D2D system is solved, and furthermore, the expenditure of a storage of the UE is reduced through timely sending the feedback.
Description
Technical field
The present invention relates to the scheme of device to mobile communication transmission in device (D2D-Device to Device) system, particularly relate to the D2D mobile communication transmission scheme based on Long Term Evolution (LTE-Long Term Evolution) framework.
Background technology
In traditional third generation partner program (3GPP-3rd Generat ion Partner Project) Long Term Evolution (LTE-Long Term Evolution) system, two kinds of frame structures have been defined, i.e. the frame structure 2 of the frame structure 1 of Frequency Division Duplexing (FDD) (FDD-Frequency Division Duplex) system and time division duplex (TDD-Time Division Duplex) system.The difference of the two is that each subframe of FDD frame structure is 1 millisecond (ms-millisecond); and TDD system has defined 1～2 special subframe in each frame (10 subframes); special subframe, by downlink synchronization slot, is protected interval, and uplink synchronous time slot three parts form.According to the difference of ascending-descending subframes ratio, 3GPP has defined the TDD-LTE system frame structure as table 1, and wherein D represents descending sub frame, and U represents sub-frame of uplink, and S is special subframe:
Table 1:TDD LTE frame structure
In traditional 3GPP version, transfer of data occurs between base station and subscriber equipment (UE-User Equipment).In 3GPP R12, D2D is set up the project and is discussed, and the essential characteristic of D2D is the transfer of data allowing between UE.For FDD and TDD system, the Main Viewpoints of 3GPP is: in D2D system, UE realizes transmitting-receiving and do not allow UE to receive and dispatch simultaneously in same frequency range.Further, the interference for fear of downlink data to D2D communication, the current Main Viewpoints of 3GPP is to use upstream band (FDD) or subframe (TDD) to communicate by letter for D2D.
As the important technology in legacy network, mixed automatic retransfer request (HARQ-Hybrid Automatic Repeat Request) and Adaptive Modulation and Coding (AMCS-Adaptive Modulation and Coding Scheme) inevitably will continue to use in D2D.Therefore, reception UE in D2D (RUE-Receiving UE) also needs like that the data that receive to be fed back to the UE in legacy network, for example reply/non-replying (ACK/NACK-Acknowledge/Non-acknowledge), the information such as channel status indication (CSI-Channel Status Indicator).In addition, some supplementarys are as synchronously, and the information such as demodulated reference signal (DMRS-Demodulation Reference Signal) also likely need to be fed back to transmission UE (TUE-Transmitting UE).
In traditional LTE system, the uplink feedback information of UE is mainly to transmit by Physical Uplink Control Channel (PUCCH-Physical Uplink Control Channel).PUCCH takies the frequency band at 1 carrier wave edge in subframe conventionally, and the remaining band resource of carrier wave can be for transmitting physical Uplink Shared Channel (PUSCH-Physical Uplink Shared Channel), i.e. PUCCH and PUSCH frequency division multiplexing.
Summary of the invention
When the transmission mode of D2D system time division duplex makes UE send feedback information, reciever can not send data message simultaneously.Inventor finds by research, and the feedback information in traditional scheme is full of a subframe, if a corresponding feedback information of data block, overall system capacity generally will, for transmitting feedback information, greatly reduce efficiency of transmission.
The invention discloses a kind of method communicating in subscriber equipment (UE) of D2D system, wherein, comprise the steps:
-at subframe t, send first information piece
Wherein, described subframe t consists of X symbol, and described X is 14 for normal cyclic prefix (CP), and for expansion, CP is 12.The duration of described first information piece is T1 symbol, and described T1 is greater than 0 positive integer that is less than described X.Described first information piece comprises demodulated reference signal (DMRS), and at least one information below:
A. reply/non-replying (ACK/NACK)
B. channel status indication (CSI)
C. synchronizing signal
D. timing adjustment signaling
Concrete, according to an aspect of the present invention, it is characterized in that:
When described first information piece comprises described ACK/NACK, the upper data that receive of described ACK/NACK indication subframe k,
Wherein, described subframe k receives the subframe of data block and the interval of described subframe k and described subframe t to be not less than 3 subframes recently in described subframe t subframe before
Concrete, according to an aspect of the present invention, it is characterized in that, described demodulated reference signal (DMRS) adopts one of following pattern:
Discontinuous resource particle (RE) in-mono-symbol
The part of descending DMRS second time slot in subframe of-existing normal sub-frames
Described subframe is 1ms in the duration of LTE system, and wherein, for normal CP, 1 subframe consists of 14 symbols, and for expansion CP, 1 subframe consists of 12 symbols.According to D2D, reuse Corticofugal Modulation of Somatosensory mode or the up modulation system of LTE, described symbol can be respectively OFDM (OFDM-Orthogonal Frequency Division Multiplexing) symbol or single-carrier frequency division multiple access symbol (SC-FDMA:Single-Carrier Frequency Division Multiple Access).
Described CSI comprises CSI type that define in LTE or new definition, the CSI type defining in LTE comprises ACK/NACK, channel quality indication (CQI-Channel Quality Indicator), pre-coding matrix indication (PMI-Precoding Matrix Indicator), order indication (RI-Rank Indicator), intercepts signal (SRS-Sounding Reference Signal) etc.The CSI type of new definition may comprise demonstration channel condition information etc., needs further to be defined.Described CSI can be one type, and for example ACK/NACK also can comprise multiple CSI, for example CQI and PMI simultaneously.
Above-mentioned synchronizing signal comprises synchronizing signal or the new synchronizing signal defining defining in LTE, the synchronizing signal of LTE definition comprises Physical Random Access Channel (PRACH-Physical Random Access Channel), and the synchronizing channel of new definition may comprise that 3GPP just strengthens at cellulor the exploration signal (Discovery Signal) of discussing in problem.
Described timing adjustment signaling, for adjusting the transmitting time of opposite end UE, can be dynamic signaling or high-level signaling.
Described DMRS is used for channel estimating with the above-mentioned information type a～d of demodulation.The possible pattern of described DMRS is as follows:
Discontinuous resource particle (RE) in-mono-symbol
Continuous resource particle (RE) in-mono-symbol
The part of descending DMRS second time slot in subframe of-existing normal sub-frames
In above-mentioned the first scheme, in described symbol, other RE can, for transmitting the out of Memory in described first information piece, therefore can minimize the shared symbolic number of described first information piece; Above-mentioned first scheme is more suitable for OFDM modulation system.
As one embodiment of the present of invention, in tdd frame structure #1, subframe 2 is communicated by letter for D2D with subframe 7, and UE1 and UE2 carry out D2D communicate by letter-adopt normal CP and SC-FDMA symbol, UE2 has sent a data block in subframe 2 to UE1, and UE1 sends corresponding feedback information in subframe 7.Subframe 2 be UE1 before subframe 7, receive recently the subframe of data and between the two introns frame number be not less than 3.Wherein, half RE in equally spaced first symbol that takies subframe 7 sends DMRS; Remaining RE sends ACK/NACK, and described ACK/NACK has reflected whether UE1 has correctly accepted the described data block in subframe 2.First information piece example in accompanying drawing 1 (a) mapping mode of the present embodiment first information piece.
As another embodiment of the present invention, in FDD system, the subframe of uplink carrier frequencies 1 is to subframe 10 for D2D communication, and UE1 and UE2 carry out D2D communicate by letter-adopt normal CP and OFDM symbol, UE2 has sent a data block at taro frame 1 to UE1, and UE1 sends corresponding feedback information in subframe 5.Subframe 1 is that UE1 received recently the subframe of data and 3, interval subframe between the two before subframe 5.Wherein, the parton carrier wave that takies the 13rd and the 14th OFDM symbol of subframe 5 sends the pattern that DMRS-reuses existing DMRS port 7 and port 8; The non-DMRS resource particle (RE) that takies the 13rd OFDM symbol of subframe 5 sends ACK/NACK and 4 bit CQI of 2 bits; The non-DMRS resource particle (RE) that takies the 14th OFDM symbol of subframe 5 sends PMI; The 12nd the OFDM symbol that takies subframe 5 sends timing adjustment signaling.The ACK/NACK of described 2 bits and 4 bit CQI can adopt the mode of frequency division multiplexing or code division multiplexing to be mapped to described the 13rd OFDM symbol.First information piece example in accompanying drawing 1 (b) mapping mode of the present embodiment first information piece.
As another embodiment of the present invention, in FDD system, the subframe of uplink carrier frequencies 1 is to subframe 10 for D2D communication, and UE1 and UE2 carry out D2D communicate by letter-adopt normal CP and OFDM symbol, first symbol is used to the transmission of DMRS, and second symbol is used for the transmission of ACK and CQI.First information piece example in accompanying drawing 1 (3) mapping mode of the present embodiment first information piece.
Concrete, according to an aspect of the present invention, it is characterized in that, also comprise the steps:
-at subframe t, receive the second block of information
The duration of described the second block of information is T2 symbol, and described T2 is positive integer, and described T2 and described T1 and be less than or equal to described X.Described the second block of information comprises demodulated reference signal (DMRS), and at least one information below:
A. receive and control indication (RCI)
B. data
C. timing adjustment signaling
Concrete, according to above-mentioned aspect of the present invention, it is characterized in that, described demodulated reference signal (DMRS) is reused one of following pattern:
The descending DMRS pattern of-existing normal sub-frames
The descending DMRS pattern of-TDD special subframe
-up DMRS pattern
Above-mentioned reception is controlled indication (RCI) and is comprised the needed information of demodulating data, and possible information comprises resource distribution, MCS, and HARQ process number, new data indication, power is controlled, redundancy versions etc.Above-mentioned timing adjustment signaling, for adjusting the transmitting time of opposite end UE, can be dynamic signaling or high-level signaling.
As one embodiment of the present of invention, the second block of information has taken 2～14 SC-FDMA symbols of normal sub-frames, and DMRS wherein reuses existing up DMRS pattern.The first and second block of informations have taken altogether 14 symbols.The second block of information example in accompanying drawing 1 (a) mapping mode of the present embodiment the second block of information.
As another embodiment of the present invention, the second block of information has taken 1～11 OFDM symbol of normal sub-frames, and DMRS wherein reuses the descending DMRS pattern of TDD special subframe-because the part of the descending DMRS of normal sub-frames second time slot in subframe is used to first information piece.The first and second block of informations have taken altogether 14 symbols.The second block of information example in accompanying drawing 1 (b) mapping mode of the present embodiment the second block of information.
As another embodiment of the present invention, in FDD system, the second block of information has taken 4～14 OFDM symbols of normal sub-frames, and DMRS wherein reuses existing up DMRS pattern.The first and second block of informations have taken altogether 13 symbols, and the 3rd symbol is used as protecting interval-for holding first information piece and the propagation delay of the second block of information between D2D UE.The second block of information example in accompanying drawing 1 (c) mapping mode of the present embodiment the second block of information.
Concrete, according to an aspect of the present invention, it is characterized in that, if described the second block of information comprises described timing adjustment signaling, also comprise the steps
-according to described timing adjustment signaling, adjust transmitting time
Concrete, according to an aspect of the present invention, it is characterized in that, for time division duplex (TDD) system, described T2 and described T1 with equal described X.
For Frequency Division Duplexing (FDD) (FDD) system, described T2 and described T1 and equal described X and subtract 1 or equal X.
Described first information piece and described the second block of information are sent by two UE respectively; and in same subframe, consider the propagation delay that two distances between UE cause, need in theory the protection interval of 2r/c; r wherein, c is respectively two distance and lighies velocity between UE.The general distance of two UE of considering D2D communication is no more than for example 500 meters, and the protection needing is spaced apart 3.3 microseconds (us-microsecond).For TDD system, can utilize the protection interval of special subframe to receive the protection interval of D2D communication, so TDD system do not need additionally to reserve the protection interval of D2D, described T2 and described T1 with equal described X.For FDD system, there are two kinds of selections: be the protection interval of the reserved symbol of D2D, or reserved protection interval and stand certain performance loss.Consider that typical D2D communication distance is very little, described performance loss is acceptable.
The transmission that UE in D2D system should adjust opposite end UE by signaling is regularly to avoid interference.For example, while having floated to next subframe of eNB timing when the signal of transmission UE transmission receives UE because propagation delay arrives, reception UE can shift to an earlier date transmitted signal by timing adjustment signaling transmission UE.
The invention discloses a kind of method communicating in subscriber equipment (UE) of D2D system, wherein, comprise the steps:
-at subframe t, receive first information piece
Wherein, described subframe t consists of X symbol, and described X is 14 for normal CP, and for expansion, CP is 12.The duration of described first information piece is T1 symbol, and described T1 is greater than 0 positive integer that is less than described X.Described first information piece comprises demodulated reference signal (DMRS), and at least one information below:
A. reply/non-replying (ACK/NACK)
B. channel status indication (CSI)
C. synchronizing signal
D. timing adjustment signaling
Concrete, according to an aspect of the present invention, it is characterized in that, also comprise the steps
-at subframe t, send the second block of information
The duration of described the second block of information is T2 symbol, and described T2 is positive integer, and described T2 and described T1 and be less than or equal to described X.Described the second block of information comprises demodulated reference signal (DMRS), and at least one information below:
A. receive and control indication (RCI)
B. data
C. timing adjustment signaling
Concrete, according to an aspect of the present invention, it is characterized in that, if described first information piece comprises described timing adjustment signaling, also comprise the steps
-according to described timing adjustment signaling, adjust transmitting time
Concrete, according to an aspect of the present invention, it is characterized in that, when described first information piece comprises described ACK/NACK, also comprise the steps:
When-described ACK/NACK is NACK, at subframe j, retransmit the data of subframe k, when described ACK/NACK is ACK, at subframe j, send new data
Wherein, described subframe k sends the subframe of data block and the interval of described subframe k and described subframe t to be not less than 3 subframes recently in the subframe before described subframe t, described subframe j sends the subframe of data block and the interval of described subframe j and described subframe t to be not less than 3 subframes recently in the subframe after described subframe t.
Above-mentioned data retransmission comprises and chases merging (CC-Chase Combining) or incremental redundancy (IR-Incremental Redundancy) according to traditional scheme.
Because each subframe all can be held a first information piece and the second block of information, therefore for each data block (the second block of information), there is an independently feedback indication, do not need to adopt the ACK/NACK binding strategy of similar TDD system, thereby can send more timely the memory spending that feedback reduces UE.
Concrete, according to an aspect of the present invention, it is characterized in that, described demodulated reference signal (DMRS) adopts one of following pattern:
Discontinuous resource particle (RE) in-mono-symbol
The part of descending DMRS second time slot in subframe of-existing normal sub-frames
Concrete, according to an aspect of the present invention, it is characterized in that, described demodulated reference signal (DMRS) is reused one of following pattern:
The descending DMRS pattern of-existing normal sub-frames
The descending DMRS pattern of-TDD special subframe
-up DMRS pattern
The invention discloses a kind of subscriber equipment, comprising:
The first module: send first information piece at subframe t
Wherein, described subframe t consists of X symbol, and described X is 14 for normal cyclic prefix (CP), and for expansion, CP is 12.The duration of described first information piece is T1 symbol, and described T1 is greater than 0 positive integer that is less than described X.Described first information piece comprises demodulated reference signal (DMRS), and at least one information below:
A. reply/non-replying (ACK/NACK)
B. channel status indication (CSI)
C. synchronizing signal
D. timing adjustment signaling
As an embodiment, in the said equipment, also comprise:
The second module: receive the second block of information at subframe t
The duration of described the second block of information is T2 symbol, and described T2 is positive integer, and described T2 and described T1 and be less than or equal to described X.Described the second block of information comprises demodulated reference signal (DMRS), and at least one information below:
A. receive and control indication (RCI)
B. data
C. timing adjustment signaling
As an embodiment, if described the second block of information comprises described timing adjustment signaling, in the said equipment, also comprise:
The 3rd module: adjust transmitting time according to described timing adjustment signaling
The invention also discloses a kind of subscriber equipment, comprising:
The first module: receive first information piece at subframe t
Wherein, described subframe t consists of X symbol, and described X is 14 for normal cyclic prefix (CP), and for expansion, CP is 12.The duration of described first information piece is T1 symbol, and described T1 is greater than the positive integer that O is less than described X.Described first information piece comprises demodulated reference signal (DMRS), and at least one information below:
A. reply/non-replying (ACK/NACK)
B. channel status indication (CSI)
C. synchronizing signal
D. timing adjustment signaling
As an embodiment, the said equipment also comprises:
The second module: send the second block of information at subframe t
The duration of described the second block of information is T2 symbol, and described T2 is positive integer, and described T2 and described T1 and be less than or equal to described X.Described the second block of information comprises demodulated reference signal (DMRS), and at least one information below:
A. receive and control indication (RCI)
B. data
C. timing adjustment signaling
As an embodiment, if described first information piece comprises described timing adjustment signaling, in the said equipment, also comprise:
The 3rd module: adjust transmitting time according to described timing adjustment signaling
The invention solves the problem of the efficiency of transmission reduction causing due to feedback in D2D system, by design, be less than the feedback information of 1 subframe and in each subframe, allow the UE of D2D communication to occur once mutual, the present invention has improved the efficiency of transmission of D2D system greatly, simultaneously by feeding back more timely the memory spending that has reduced UE.
Accompanying drawing explanation
By reading the detailed description that non-limiting example is done of doing with reference to the following drawings, other features, objects and advantages of the present invention will become more apparent:
Fig. 1 shows the mapping schematic diagram of first information piece and the second block of information;
Fig. 2 shows the schematic diagram that utilizes the protection interval of special subframe to hold D2D propagation delay in TDD system according to an embodiment of the invention;
Fig. 3 shows the structured flowchart that send the device of feedback for the reception Data Concurrent of UE according to an embodiment of the invention;
Fig. 4 shows the structured flowchart that the device of data is fed back and sends in the reception for UE according to an embodiment of the invention;
Embodiment
Below in connection with accompanying drawing, technical scheme of the present invention is described in further detail, it should be noted that, in the situation that not conflicting, the application's embodiment and the feature in embodiment can combine arbitrarily mutually.
Embodiment 1
Embodiment 1 utilizes the protection interval of special subframe to hold D2D propagation delay schematic diagram in TDD system.As shown in Figure 2, Dw wherein, G, Up represents respectively downlink synchronization slot, protection interval, uplink synchronous time slot.In TDD system, macrocell (eNB-eNodeB) frame structure #0 and only sub-frame of uplink are used to D2D communication.Suppose that eNB is d1 to the propagation delay of UE1, eNB is d2 to the propagation delay of UE2, and UE1 is d12 to the propagation delay of UE2, d1 and d12 and equal d2.UE1 shifts to an earlier date g/2 with respect to the timing of the subframe 2 of eNB and sends first information piece U1 to UE2, and wherein g is the duration of protecting interval G in special subframe, U1 arrive UE2 time delay d12.UE2 sends the second block of information U2 immediately to UE1 after receiving U1, and the time that U2 arrives UE1 has postponed again d12.Therefore, UE1 and UE2 transmit first information piece and the second block of information actual work time is that 1ms adds the d12 of 2 times in subframe 2.Consider that the d12 of 2 times is much smaller than g/2, the protection interval G of special subframe can hold enough D2D protection intervals.
Embodiment 2
Embodiment 2 send the structured flowchart of the device of feedback for the reception Data Concurrent of UE, as shown in Figure 3.In device 100, data sink 101 receives data (simultaneously comprising signaling, i.e. the second block of information) at subframe t.If comprise timing adjustment signaling in the data that described device 101 receives, timing adjusting apparatus 102 is adjusted transmitting time according to described timing adjustment signaling.Feedback dispensing device 103 sends the feedback information for described data at subframe k, wherein said subframe k after subframe t and interval be not less than 3 subframes, described feedback information is first information piece.
Above-mentioned timing adjusting apparatus 102 is option means, in accompanying drawing 3, with dotted line, indicates.
Embodiment 3
Embodiment 3 feeds back and sends the structured flowchart of the device of data for the reception of UE, as shown in Figure 4.In device 200, feedback receiving system 201 receives feedback (being first information piece) at subframe t.If comprise timing adjustment signaling in the feedback that described device 201 receives, timing adjusting apparatus 202 is adjusted transmitting time according to described timing adjustment signaling.Data sending device 203 sends data at subframe t.
Above-mentioned timing adjusting apparatus 202 is option means, in accompanying drawing 4, with dotted line, indicates.
Embodiment 4
Embodiment 4 feeds back and sends the structured flowchart of the device of data for the reception of UE, as shown in Figure 4.In device 200, feedback receiving system 201 receives feedback (being first information piece) at subframe t.If comprise timing adjustment signaling in the feedback that described device 201 receives, timing adjusting apparatus 202 is adjusted transmitting time according to described timing adjustment signaling.If comprise ACK in described feedback, data sending device 203 sends new data at subframe k, if comprise NACK in described feedback, data sending device 203 sends data retransmission at subframe k, wherein said subframe k after subframe t and interval be not less than 3 subframes.
Above-mentioned timing adjusting apparatus 202 is option means, in accompanying drawing 4, with dotted line, indicates.
One of ordinary skill in the art will appreciate that all or part of step in said method can come instruction related hardware to complete by program, described program can be stored in computer-readable recording medium, as read-only memory, and hard disk or CD etc.Optionally, all or part of step of above-described embodiment also can realize with one or more integrated circuit.Accordingly, each modular unit in above-described embodiment, can adopt example, in hardware to realize, and also can be realized by the form of software function module, and the application is not limited to the combination of the software and hardware of any particular form.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, to make any modifications, are equal to replacement, improve etc., within all should being included in protection scope of the present invention.
Claims (19)
1. user, to the method communicating in the subscriber equipment (UE) of custom system, wherein, comprises the steps:
-at subframe t, send first information piece
Wherein, described subframe t consists of X symbol, and described X is 14 for normal cyclic prefix (CP), and for expansion, CP is 12.The duration of described first information piece is T1 symbol, and described T1 is greater than 0 positive integer that is less than described X.Described first information piece comprises demodulated reference signal (DMRS), and at least one information below:
A. reply/non-replying (ACK/NACK)
B. channel status indication (CSI)
C. synchronizing signal
D. timing adjustment signaling.
2. method according to claim 1, is characterized in that, also comprises the steps:
-at subframe t, receive the second block of information
The duration of described the second block of information is T2 symbol, and described T2 is positive integer, and described T2 and described T1 and be less than or equal to described X.Described the second block of information comprises demodulated reference signal (DMRS), and at least one information below:
A. receive and control indication (RCI)
B. data
C. timing adjustment signaling.
3. method according to claim 2, is characterized in that, if described the second block of information comprises described timing adjustment signaling, also comprises the steps
-according to described timing adjustment signaling, adjust transmitting time.
4. method according to claim 1, is characterized in that:
When described first information piece comprises described ACK/NACK, the upper data that receive of described ACK/NACK indication subframe k,
Wherein, described subframe k receives the subframe of data block and the interval of described subframe k and described subframe t to be not less than 3 subframes recently in described subframe t subframe before.
5. method according to claim 1, is characterized in that, described demodulated reference signal (DMRS) adopts one of following pattern:
Discontinuous resource particle (RE) in-mono-symbol
Continuous resource particle (RE) in-mono-symbol
The part of descending DMRS second time slot in subframe of-existing normal sub-frames.
6. method according to claim 2, is characterized in that, described demodulated reference signal (DMRS) is reused one of following pattern:
The descending DMRS pattern of-existing normal sub-frames
The descending DMRS pattern of-TDD special subframe
-up DMRS pattern.
7. according to the method described in claim 1～2, it is characterized in that, for time division duplex (TDD) system, described T2 and described T1 and equal described X.
8. user, to the method communicating in the subscriber equipment (UE) of custom system, wherein, comprises the steps:
-at subframe t, receive first information piece
Wherein, described subframe t consists of X symbol, and described X is 14 for normal CP, and for expansion, CP is 12.The duration of described first information piece is T1 symbol, and described T1 is greater than 0 positive integer that is less than described X.Described first information piece comprises demodulated reference signal (DMRS), and at least one information below:
A. reply/non-replying (ACK/NACK)
B. channel status indication (CSI)
C. synchronizing signal
D. timing adjustment signaling.
9. method according to claim 8, is characterized in that, also comprises the steps:
-at subframe t, send the second block of information
The duration of described the second block of information is T2 symbol, and described T2 is positive integer, and described T2 and described T1 and be less than or equal to described X.Described the second block of information comprises demodulated reference signal (DMRS), and at least one information below:
A. receive and control indication (RCI)
B. data
C. timing adjustment signaling.
10. method according to claim 8, is characterized in that, if described first information piece comprises described timing adjustment signaling, also comprises the steps:
-according to described timing adjustment signaling, adjust transmitting time.
11. methods according to claim 8, is characterized in that, when described first information piece comprises ACK/NACK, also comprise the steps:
When-described ACK/NACK is NACK, at subframe j, retransmit the data of subframe k, when described ACK/NACK is ACK, at subframe j, send new data
Wherein, described subframe k sends the subframe of data block and the interval of described subframe k and described subframe t to be not less than 3 subframes recently in the subframe before described subframe t, described subframe j sends the subframe of data block and the interval of described subframe j and described subframe t to be not less than 3 subframes recently in the subframe after described subframe t.
12. methods according to claim 8, is characterized in that, described demodulated reference signal (DMRS) adopts one of following pattern:
Discontinuous resource particle (RE) in-mono-symbol
Continuous resource particle (RE) in-mono-symbol
The part of descending DMRS second time slot in subframe of-existing normal sub-frames.
13. methods according to claim 9, is characterized in that, described demodulated reference signal (DMRS) is reused one of following pattern:
The descending DMRS pattern of-existing normal sub-frames
The descending DMRS pattern of-TDD special subframe
-up DMRS pattern.
14. 1 kinds of subscriber equipmenies, is characterized in that, this equipment comprises:
The first module: send first information piece at subframe t
Wherein, described subframe t consists of X symbol, and described X is 14 for normal cyclic prefix (CP), and for expansion, CP is 12.The duration of described first information piece is T1 symbol, and described T1 is greater than 0 positive integer that is less than described X.Described first information piece comprises demodulated reference signal (DMRS), and at least one information below:
A. reply/non-replying (ACK/NACK)
B. channel status indication (CSI)
C. synchronizing signal
D. timing adjustment signaling.
15. equipment according to claim 14, is characterized in that, this equipment also comprises:
The second module: receive the second block of information at subframe t
The duration of described the second block of information is T2 symbol, and described T2 is positive integer, and described T2 and described T1 and be less than or equal to described X.Described the second block of information comprises demodulated reference signal (DMRS), and at least one information below:
A. receive and control indication (RCI)
B. data
C. timing adjustment signaling.
16. equipment according to claim 15, is characterized in that, if described the second block of information comprises described timing adjustment signaling, this equipment also comprises:
The 3rd module: adjust transmitting time according to described timing adjustment signaling.
17. 1 kinds of subscriber equipmenies, is characterized in that, this equipment comprises:
The first module: receive first information piece at subframe t
Wherein, described subframe t consists of X symbol, and described X is 14 for normal cyclic prefix (CP), and for expansion, CP is 12.The duration of described first information piece is T1 symbol, and described T1 is greater than 0 positive integer that is less than described X.Described first information piece comprises demodulated reference signal (DMRS), and at least one information below:
A. reply/non-replying (ACK/NACK)
B. channel status indication (CSI)
C. synchronizing signal
D. timing adjustment signaling.
18. equipment according to claim 17, is characterized in that, this equipment also comprises:
The second module: send the second block of information at subframe t
The duration of described the second block of information is T2 symbol, and described T2 is positive integer, and described T2 and described T1 and be less than or equal to described X.Described the second block of information comprises demodulated reference signal (DMRS), and at least one information below:
A. receive and control indication (RCI)
B. data
C. timing adjustment signaling.
19. equipment according to claim 17, is characterized in that, if described first information piece comprises described timing adjustment signaling, this equipment also comprises:
The 3rd module: adjust transmitting time according to described timing adjustment signaling.
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| CN110190940B (en) | 2021-07-30 |
| CN110190940A (en) | 2019-08-30 |
| CN104219023B (en) | 2019-05-31 |
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