CN103078726A

CN103078726A - Relay transmission method and device

Info

Publication number: CN103078726A
Application number: CN2013100463615A
Authority: CN
Inventors: 栗忠峰; 尚政
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2008-10-24
Filing date: 2009-02-02
Publication date: 2013-05-01
Anticipated expiration: 2029-02-02
Also published as: CN103078726B; CN103138827A; CN103138827B; CN103078718A; CN103078675B; CN103078675A; CN103078718B; CN103179071B; CN103179071A

Abstract

The embodiment of the invention discloses a relay transmission method and a relay transmission device. The method comprises the following steps: selecting a subframe in a time division duplex (TDD) relay frame as a relay link subframe, wherein the step of selecting the subframe in the TDD relay frame as the relay link subframe comprises the following steps of selecting a downlink subframe in the TDD relay frame as a downlink relay link subframe, and/or selecting the downlink subframe in the TDD relay frame as an uplink relay link subframe, and/or selecting an uplink subframe in the TDD relay frame as the uplink relay link subframe; and carrying out relay transmission according to the relay link subframe. In the embodiment of the invention, in the process of data transmission, the subframe which can be used for relay link transmission is selected, when a relay link is used for carrying out data transmission, the intrinsic constraint of the TDD frame structure in the prior art is met, and a system using the TDD relay frame is covered and expanded, thereby enhancing the throughput.

Description

The method and apparatus of relay transmission

Technical field

The present invention relates to communication technical field, particularly relate to the method and apparatus of relay transmission.

Background technology

Development along with wireless communication technology, traffic rate and communication quality there has been higher demand, the demand to traffic rate and communication quality has been satisfied in wire transmission to a certain extent, but wire transmission requires operator to lay optical cable or rents cable resource, and the use of wire transmission has been caused constraint.Transmission has effectively solved this problem as wireless backhaul by using Relay (relaying), and the Relay technology can be carried out the covering expansion of residential quarter, the homogenizing of cell capacity lifting and cell throughout.And the introducing meeting of Relay brings variation to the frame structure of original system.

In the prior art, a kind of use TDD (Time Division Duplex, time division duplex) Relay frame structure as shown in Figure 1, eNB (enhanced Node B, the base station) with RN (Relay Node/Relay, relay station) and RN and UE (User Equipment, subscriber equipment) communicate to subframe4 at subframe1 (subframe 1).Subframe1 is used for the DL (Downlink of eNB-＞Relay, descending) repeated link, subframe2 is used for the DL access link of Relay-＞UE, Subframe3 is used for the UL (Uplink of Relay-＞eNB, up) repeated link, Subframe4 is used for the UL access link of UE-＞Relay.

In realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art:

In existing relay system, when carrying out transfer of data according to tdd frame structure of the prior art, can't realize relay transmission.

Summary of the invention

The embodiment of the invention provides a kind of method and apparatus of relay transmission, so that the relay station under the TDD system can be realized relay transmission.

In order to achieve the above object, the embodiment of the invention has proposed a kind of method of relay transmission, comprising:

Choose subframe in the TDD repeater frame as the repeated link subframe, subframe comprises as the repeated link subframe in the described TDD of the choosing repeater frame: choose in the TDD repeater frame descending sub frame as the downlink relay link subframe and/or choose in the TDD repeater frame descending sub frame as the relay uplink subframe, and/or choose in the TDD repeater frame sub-frame of uplink as the relay uplink subframe;

Carry out relay transmission according to described repeated link subframe.

The embodiment of the invention has also proposed a kind of communication equipment, comprising:

Choose module, be used for choosing the subframe of time division duplex repeater frame as the repeated link subframe, subframe in the described TDD of the choosing repeater frame comprises as the repeated link subframe: choose descending sub frame in the TDD repeater frame as the downlink relay link subframe and/or choose descending sub frame in the TDD repeater frame as the relay uplink subframe, and/or choose sub-frame of uplink in the TDD repeater frame as the relay uplink subframe;

Transport module is used for choosing the repeated link subframe that module chooses and carrying out relay transmission according to described.

The technical scheme that provides according to the embodiment of the invention, communication equipment is when carrying out transfer of data, chosen the subframe that can be used for the repeated link transmission, in use continue and meet tdd frame structure inherent constraint in the prior art when link carries out transfer of data, and the system that uses the TDD repeater frame covered expansion, so that throughput strengthens.

Description of drawings

In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is relay frame structures schematic diagram in the prior art;

Fig. 2 is the method flow diagram of a kind of relay transmission of the embodiment of the invention one proposition;

Fig. 3 is the schematic diagram of not introducing the frame structure of relay transmission in the embodiment of the invention one among the TDD;

Fig. 4 uses complete subframe as the frame structure schematic diagram of repeated link in the embodiment of the invention one;

Fig. 5 uses the DL subframe as the DL repeated link in the embodiment of the invention one, use the UL subframe as the frame structure schematic diagram of UL repeated link;

Fig. 6 contains eNB in the embodiment of the invention one, RN, the frame structure schematic diagram of the system of UE;

Fig. 7 is a kind of frame structure schematic diagram that the embodiment of the invention two proposes;

Fig. 8 is the another kind of frame structure schematic diagram that the embodiment of the invention two proposes;

Fig. 9 is the another kind of frame structure schematic diagram that the embodiment of the invention two proposes;

Figure 10 is a kind of frame structure schematic diagram that the embodiment of the invention three proposes;

Figure 11 is a kind of frame structure schematic diagram that the embodiment of the invention four proposes;

Figure 12 is a kind of frame structure schematic diagram that the embodiment of the invention five proposes;

Figure 13 is the another kind of frame structure schematic diagram that the embodiment of the invention five proposes;

Figure 14 is a kind of frame structure schematic diagram that the embodiment of the invention six proposes;

Figure 15 is a kind of frame structure schematic diagram that the embodiment of the invention seven proposes;

Figure 16 is a kind of communication apparatus construction schematic diagram that the embodiment of the invention eight proposes.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.

A kind of relay transmission method that the embodiment of the invention one proposes as shown in Figure 2, comprising:

Step S201 chooses subframe in the TDD repeater frame as the repeated link subframe;

The subframe of choosing in the TDD repeater frame comprises as the repeated link subframe: choose descending sub frame in the TDD repeater frame as the downlink relay link subframe and/or choose descending sub frame in the TDD repeater frame as the relay uplink subframe, and/or choose sub-frame of uplink in the TDD repeater frame as the relay uplink subframe.

Step S202 carries out relay transmission according to the repeated link subframe.

When carrying out relay transmission according to the repeated link subframe of selecting; when if descending sub frame is as relay uplink subframe or downlink relay link subframe in the repeater frame; choose in this descending sub frame top n OFDM symbol as the UE under repeater and the repeater; perhaps transmit as the access link between the UE under base station and the base station; be used for sending descending pilot frequency; perhaps descending pilot frequency and control signal; remaining OFDM symbol namely transmits and/or guard time as repeated link in the time except the top n OFDM outer symbol in this descending sub frame as repeated link transmission and/or guard time in this descending sub frame.

M OFDM symbol arranged in the described descending sub frame, and described M, N are natural number, and N is less than M.

The scheme that the embodiment of the invention provides can be applied in each version (Rel-8 of LTE, LTE Advanced, LTE, Rel-9, Rel-10 etc.), global inserting of microwave interoperability (World Interoperabilityfor Microwave Access, WiMax), in the system such as super broad band radio communication (Ultra-Wideband, UMB).

For example, in the LTE/LTE-A system, communication equipment carries out data transfer according to the TDD repeater frame, comprises 10 subframes in 1 frame of this TDD repeater frame, and 1 frame length is 10ms, and wherein each subframe lengths is 1ms.In this LTE/LTE-A TDD repeater frame, comprise repeated link subframe, access link subframe and guard time, this repeated link subframe takies one or more subframes, this access link subframe takies one or more subframes, and this guard time takies the part of the special subframe of LTE/LTE-A TDD; Or this guard time takies the part of this repeated link subframe.Can carry out communicating by letter between the subscriber equipment of base station and base station service according to this repeated link subframe; And/or carry out communicating by letter between base station and the relay station according to described repeated link subframe; And/or carry out communicating by letter between the subscriber equipment of relay station and relay station service according to described repeated link subframe.Base station or relay station are underway to continue when transmitting, and can be suitable for the tdd frame of identical descending sub frame and sub-frame of uplink proportioning, also can be suitable for the frame of identical configuration.This guard time specifically comprises: reiving/transmitting state change-over time and free time, this reiving/transmitting state change-over time is the reiving/transmitting state change-over time of base station and/or the reiving/transmitting state change-over time of relay station; This guard time is the integral multiple in sampling time, or this guard time is that sampling number is the approximate number that Fourier transform is counted, and described sampling number is that Fourier transform is counted/2^n, and described n is natural number; Perhaps, at least a acquisition that described guard time also can be from Cyclic Prefix, OFDM symbol and the subframe of OFDM symbol; Or this guard time is adjusted in signaling by sending both sides.

Among all embodiment of the present invention; D in the accompanying drawing all represents for descending subframe; U in the accompanying drawing all represents for up subframe; S in the accompanying drawing represents the special subframe in the LTE/LTE-A TDD system; in this special subframe; comprise DwPTS (Downlink Pilot Timeslot; descending pilot frequency time slot); UpPTS (Uplink Pilot Timeslot, uplink pilot time slot) and guard time (GP), same; D in the table also represents for descending subframe; U representative in the table is used for up subframe, and the S in the table represents for DwPTS, the special subframe of UpPTS and guard time.

In the relay frame structures of TDD, if UE sends PUSCH (Physical Uplink Shared Channel at subframe (subframe) n, Physical Uplink Shared Channel), then UE will be at k subframe of n back, be that DL subframe n+k receives PHICH (Physical HARQ IndicationChannel, the physical mixed automatic re-transmission indicating channel), n wherein, the value of k (the k value is the numerical value in 0～6 configuration line) is as shown in table 1.

Table 1

For example, in table 1, for the individual subframe of the 3rd in this frame (n=3), in the 0th configuration line, corresponding k value is 7, and then UE sends PUSCH the 3rd subframe, will receive PHICH in the 0th subframe (3+7) of next frame.For next one configuration, for example in the 1st configuration line, corresponding k value is 6, and then UE sends PUSCH the 3rd subframe, will receive PHICH in the 9th subframe (3+6).

In the Relay of this TDD frame structure, if UE receives PDSCH (PhysicalDownlink Shared Channel at subframe n, Physical Downlink Shared Channel), then send ACK/NACK (regularly index) at subframe n+k, n wherein, the value of k (the k value is the numerical value in 0～6 configuration line) is as shown in table 2.

Table 2

For example, in table 2, for the 3rd subframe in this frame, in the 2nd proportioning row, corresponding k value is 4, and then UE receives PDSCH the 3rd subframe, will send ACK/NACK in the 7th subframe (3+4).For next proportioning, for example in the 5th proportioning row, corresponding k value is 9, and then UE sends ACK/NACK at the PDSCH of the 3rd the subframe reception of UL with the 2nd subframe (3+9) in next frame.

In the Relay of this TDD frame structure, if UE receives UL grant/PHICH (transfer upstream data/or the ANK/NACK of UL PUSCH) at subframe n, then send PUSCH at subframe n+k, the corresponding relation of UL grant/PHICH and PUSCH (following table UL grant can replace to PHICH, and the below no longer marks) as shown in table 3.

Table 3

Wherein, the G in the table 3 represents grant (scheduling UL data signaling), and Gn-k represents that UE receives UL grant at subframen, sends PUSCH at UL subframe n+k.For example, in the 1st subframe, when the ratio of DL (descending sub frame) and UL (sub-frame of uplink) was 2: 2, the corresponding relation of UL grant and PUSCH was G1-6, and namely UE receives UL grant in the 1st subframe, will send PUSCH in the 7th subframe (1+6).

As shown in Figure 3, in TDD, not introducing the schematic diagram of the frame structure of relay transmission in the embodiment of the invention one.Pattern A represents that eNB carries out the chronomere that DL communicates by letter with UL with UE_eNB (UE that eNB serves), and this chronomere is subframe (1 subframe is 1ms) among the figure.Each DL subframe is carried out the DL communication of eNB-＞UE_eNB, and each UL subframe is carried out the UL communication of UE_eNB-＞eNB.When in TDD, introducing the frame structure of relay transmission, as shown in Figure 4, be the frame structure schematic diagram of the complete subframe of the use in the embodiment of the invention one as repeated link, in Fig. 4, DL can have one or more subframes as the repeated link between eNB and the RN, and corresponding one or more subframes that also have in UL are used as RN to the repeated link between the eNB.When this repeated link was specifically designed to eNB and UL between the RN communicates by letter with DL, this repeated link was called the ad-hoc relay link, and when this repeated link during simultaneously as the communicating by letter of eNB and RN and eNB and UE_eNB, this repeated link is called non-ad-hoc relay link.In UL and DL, be used for the number of subframes of repeated link can be different also can be identical.The DL of RN shown in Fig. 4 and UL repeated link can take complete repeated link subframe, also can take the part except guard time in the repeated link subframe.When in TDD, introducing the frame structure of relay transmission, as shown in Figure 5, for using former DL subframe as the DL repeated link in the embodiment of the invention one, use former UL subframe as the UL repeated link.In Fig. 5, pattern A represents communication link between eNB and the UE_eNB and the communication link between RN and the UE_RN, can be used for transmitting control channel, data channel, pilot tone, synchronizing channel, the employed channel of the LTE such as broadcast channel.For fear of the channel interpolation between time domain DL subframe, with the front of DL repeated link place subframe several (1 or 2 or 3 or 4) symbol (sampling time), such as the pattern B among Fig. 5, as the access link between the access link between eNB and the UE_eNB and RN and the UE_RN, this access link (pattern B) is used for sending the DL pilot tone, control channel, PHICH, PCFICH, as only sending the DL pilot tone, perhaps send DL pilot tone and Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH), physical mixed automatic repeat request indicating channel (Physical Hybrid ARQ IndicatorChannel, PHICH), the control signals such as Physical Control Format Indicator Channel (Physical Control Format IndicatorChannel, PCFICH).In LTE/LTE-A TDD system; the DL subframe at pattern B place can be multicast single frequency network (Multi-media Broadcast over a Single FrequencyNetwork; MBSFN) subframe; pattern B is equivalent to unicast part in the MBSFN subframe; the access link that is used between the access link between eNB and the UE_eNB and RN and UE_RN sends the DL pilot tone; perhaps DL pilot tone and control channel; PHICH; the control signals such as PCFICH, the remainder of this MBSFN subframe is communicated by letter and guard time with DL between the RN as eNB.By sending pilot tone so that and carry out the interpolation of channel estimating between the pilot tone of front 1 subframe, with further raising channel estimating performance.When in the Relay of TDD frame structure, introducing the frame structure of relay transmission, as shown in Figure 6, for containing eNB in the embodiment of the invention one, RN, the frame structure schematic diagram of the system of UE.Pattern A represents that eNB carries out the link that DL communicates by letter with UL with UE_eNB, represents that also RN carries out the link that DL communicates by letter with UL with UE_RN; Pattern B represents eNB to the downlink relay link of RN, can be used for transmitting control channel data channel, pilot tone etc.; Pattern C represents descending access link, is respectively applied to eNB to UE_eNB and RN to UE_RN, can transmit PHICH, UL grant, PCFICH, the channels such as DL pilot tone.Take front several (1 or 2 or 3 or 4) the OFDM symbol of pattern C place subframe, be used for descending access link eNB to UE_eNB and descending access link RN to UE_RN, can transmit and comprise PHICH, UL grant, the information such as the control signal such as PCFICH and/or DL pilot tone.Pattern E changes original eNB into RN up to eNB to the DL subframe counterpart of UE_eNB, i.e. the subframe at pattern E place, with original DL subframe as the relay uplink subframe.In LTE/LTE-A TDD system; the DL subframe at pattern E place can be the MBSFN subframe; pattern C is equivalent to unicast part in the MBSFN subframe; the access link that is used between the access link between eNB and the UE_eNB and RN and UE_RN sends the DL pilot tone; and/or such as PDCCH; PHICH, the control signals such as PCFICH, the remainder of this MBSFN subframe is communicated by letter and guard time with UL between the RN as eNB.Pattern D represents guard time, and this guard time comprises reiving/transmitting state change-over time and free time, and this reiving/transmitting state change-over time is the reiving/transmitting state change-over time of base station and/or the reiving/transmitting state change-over time of relay station; The length of this guard time can or equal [N/ (2^n) * sampling time] for the integral multiple in sampling time, and wherein N is that the Fourier transform that uses in LTE or the LTE-A system is counted, and n is natural number 1,2,3..., 2^n＜=N.Pattern E is that RN is to the relay uplink of eNB.

In Fig. 6, the pattern A of UL part can be used as transmission UE_eNB to the UL access link of eNB, can also be as the UL access link of transmission UE_RN to RN; The pattern A of DL part, can be used as transmission eNB to the DL access link of UE_eNB, can also be as the DL access link of transmission RN to UE_RN, the pattern B of DL part, can be used as transmission eNB to the DL repeated link of RN, the pattern B of DL part can also be as the compounded link of transmission eNB to the DL repeated link of RN and eNB to the DL access link of UE_eNB; Pattern B is as the repeated link of eNB to RN, if the throughput that repeated link needs or not to use the resource of whole pattern B, pattern B also can transmit eNB simultaneously to the data channel of UE_eNB, control channel, one of pilot channel or whole.Pattern D be eNB and or RN time of the transmission of data not, can be used as the transmitting-receiving of reiving/transmitting state change-over time of eNB and/or RN or send out and receive change-over time, can also be as idle (free time) time, as shown in Figure 6, part also can have pattern D between the pattern C of RN and the pattern E, this pattern D depends on that whether satisfying sending out of eNB through the time of the distance between eNB and the RN receives change-over time, the time of the distance between passing through between this eNB and the RN, during change-over time, eNB need to be greater than receiving and dispatching change-over time at the 1st pattern D of UL place subframe greater than transmitting-receiving.When through time of this distance less than transmitting-receiving during change-over time, need between the pattern C of RN and pattern E, increase pattern D, this time span (pattern D) receive for eNB sends out change-over time and RN to transmission time of eNB with.Be the time span of pattern D length can be different on diverse location, but all need be positioned at the subframe at repeated link place.Above-mentioned change-over time or transmission time (for example pattern D of Fig. 6), also can by send both sides in signaling as adjusting in the timing adjustment, and in frame structure, do not show.

As seen, in the present embodiment, communication equipment is when carrying out transfer of data, chosen the subframe that can be used for the repeated link transmission, in use continue and meet the inherent constraint of the Rel-8 of LTE system when link carries out transfer of data, and by using LTE/LTE-A TDD repeater frame that the LTE system is covered expansion, so that throughput strengthens.

In all embodiment of the present invention, the proportioning of this descending sub frame and sub-frame of uplink all is descending sub frame when not introducing relaying and the proportioning of sub-frame of uplink, after introducing relaying, the proportioning of this descending sub frame and sub-frame of uplink may change, and specifically will decide according to the situation of reality.

The proportioning of a kind of LTE/LTE-ATDD repeater frame that the embodiment of the invention two proposes is that the proportioning of descending sub frame and sub-frame of uplink is 6: 3 o'clock frame structure, and in the present embodiment, the position corresponding relation of UL grant and PUSCH is as shown in table 4.For example, if UE receives the UL grant of this UE in subframe 0, this UE should send PUSCH in the subframe 4 of correspondence.If UE receives ULgrant to this UE in subframe 8/9, this UE should the subframe 2/3 of 1 frame send PUSCH under correspondence.

Table 4

PHICH and UL ACK/NACK position corresponding relation are as shown in table 5.What have identical patterns in the table 5 is that the correspondence position relation is arranged.For example, when subframe 4 sent PUSCH, corresponding subframe 0 position at lower 1 frame sent PHICH, sends PDSCH in subframe 0 at UE, and the corresponding subframe 4 at this frame sends UL ACK/NACK.

Table 5

In the frame structure of LTE TDD, subframe 0,1,5,6 are used for sending P-BCH (PrimaryBroadcast Channel, main attitude broadcast channel), D-BCH (Dynamic Broadcast Channel, Dynamic Broadcast Channel) P/S-SCH (Primary/Secondary Synchronization Channel, primary/secondary synchronizing channel) is in this frame structure, can't choose subframe 0,1,5,6 as downlink relay link, as can be seen from Table 5, available DL relay sub-frame can only be subframe 7,8,9.From table 5, it can also be seen that, subframe 0,1,5,6 respectively corresponding UL ACK/NACK in subframe be 2 and 4, so subframe 2 and subframe 4 can't be used as the UL repeated link.As seen from Table 5, can only choose subframe 3 as the UL repeated link.UE receives PDSCH in subframe 7 and subframe 8, to sending UL ACK/NACK in requisition for the subframe 3 (7+6 or 8+5) at next frame, can select subframe 7 and subframe 8 simultaneously as the DL repeated link.As can be seen from Table 4, subframe 8 also needs to send the PUSCH of the subframe 2 of next frame, when subframe 8 does not send UL grant, to cause subframe 2 can't send PUSCH, cause the waste of resource, therefore can choose subframe 8 front several (1 or 2 or 3 or 4) OFDM symbol as the transmission of access link, front several symbol by subframe 8 can send down control channel between eNB and UE_eNB, PCFICH, control signal and/or the pilot tones such as PHICH, can between RN and UE_RN, send down control channel, PCFICH, control signal and/or the pilot tones such as PHICH.Can find out in the table 4, when the subframe 9 of previous frame sends UL grant, need to send PUSCH in the subframe 3 of this frame, and subframe 3 is as the repeated link between RN and the eNB, when subframe 3 sent PUSCH, RN can't receive the data that UE_RN sends, therefore, under above-mentioned combination, the UL grant control channel that the subframe 9 of previous frame can not send among the PDCCH is dispatched the UL data.So can choose subframe [3,7,8,9] one or more in are as the downlink relay link subframe, remaining subframe be used as the quantity of relay uplink subframe more than or equal to 1, and subframe 3 only can be used as the relay uplink subframe as the relay uplink subframe.

As shown in Figure 7, a kind of proportioning to former LTE system descending subframe and sub-frame of uplink that comprises repeated link and access link that proposes for the embodiment of the invention two is 6: 3 frame structure schematic diagrames, in this frame structure, choose and be combined as [3 as the subframe of repeated link, 7,8], D-Psubframe in Fig. 7 and the relaying time of U-Psubfame for communicating by letter with eNB for RN, represent respectively DL and UL relaying time that RN communicates by letter with eNB, the RN of UL and the communications portion between the eNB also can be used for transmission UL control channel between UE and eNB, data channel, pilot tone etc.AB pattern in Fig. 7 represents for the access link of eNB and UE_eNB and the access link of RN and UE_RN, can be used for sending pilot tone, the DL control channel, PCFICH, PHICH for example only sends pilot tone, perhaps send pilot tone and DL control channel, PCFICH, the control signals such as PHICH.Can be used for the transmitting-receiving of RN or send out and receive change-over time and eNB to the propagation time delay between the RN at the AC pattern of Psubframe place subframe.In institute's drawings attached of the embodiment of the invention, the AB pattern identical with Fig. 7 all represents for the access link of eNB and UE_eNB and the access link of RN and UE_RN, the AC pattern identical with Fig. 7 all represent for the transmitting-receiving of RN or send out to receive change-over time and eNB to the propagation time delay between the RN, in the description of back, just repeat no more.

As shown in Figure 8, a kind of proportioning to former LTE system descending subframe and sub-frame of uplink that comprises repeated link and access link that proposes for the embodiment of the invention two is 6: 3 frame structure schematic diagrames, in this frame structure, choose and be combined as [3,7 as the subframe of repeated link, 8,9], namely subframe 3 is as RN-＞eNB, subframe 7,8,9 as eNB-＞RN.Namely choose subframe 3 as the relay uplink subframe, choose subframe 7 and subframe 8 and subframe 9 as the downlink relay link subframe.When adopting the UL subframe as the DL of repeated link, because RN causes larger UL interference during to the communicating by letter of the UE_eNB of adjacent cell and eNB to the communication meeting of eNB, feasibility is very low, the DL subframe is as RN during with UL that eNB communicates by letter, the interference of the relative UL subframe of the interference of the neighbor cell eNB that the UL direction is subject to during as the DL repeated link is little, can choose the DL subframe as the UL repeated link.As can be seen from Table 4, the corresponding subframe 3 of the UL grant that the subframe 9 of previous frame sends sends PUSCH, UL is then corresponding just not to have UL grant in subframe 3 if subframe 9 changes into, corresponding does not just need to send PHICH in subframe 9, can select subframe 7 is the DL of repeated link as eNB-＞RN, and selecting subframe 9 is the UL of repeated link as RN-＞eNB.In order not waste subframe 3 resources, can use several OFDM symbol of subframe 9 fronts to transmit control channel, such as the UL grant to the subframe 3 of next frame, PHICH, control signal and/or the pilot tones such as PCFICH.The transmission of pilot tone also helps the channel estimating interpolation between the access link subframe.

As shown in Figure 9, the descending sub frame of a kind of former LTE system that comprises repeated link and access link that proposes for the embodiment of the invention two and the proportioning of sub-frame of uplink are 6: 3 frame structure schematic diagrames, in this frame structure, choose and be combined as [7 as the subframe of repeated link, 9], can choose subframe 7 as the downlink relay link subframe, choose subframe 9 as the relay uplink subframe; Otherwise or, choose subframe 7 as the relay uplink subframe, choose subframe 9 as the downlink relay link subframe.Concrete, in subframe 0,1,2,3,4,5,6,8 respectively as eNB to the up-downgoing access link of UE_eNB, and RN is during to the up-downgoing access link of UE_RN, eNB and UE_eNB transmit control channel mutually at access link, data channel, pilot channel is at the DL access link, eNB also can send broadcast channel and synchronizing channel, and RN and UE_RN transmit control channel mutually at access link, data channel, pilot channel, at the DL access link, RN also can send broadcast channel and synchronizing channel; Subframe at the repeated link place, subframe 9 in the frame structure as shown in Figure 9,1～4 OFDM symb in front to this subframe of eNB sends pilot tone and/or control channel for eNB to the UE under it, a back to back part is that sending out of eNB received change-over time, then be the repeated link Psubframe time, the back is the transmitting-receiving change-over time of eNB again.To the front 1 of this subframe of RN or 2 or 3 or 4 OFDM symbol be used for eNB and RN respectively the UE under it transmit control channel PHICH, control signal and/or the pilot tones such as PCFICH.The transmission of pilot tone also helps the channel estimating interpolation between the access link subframe.A back to back part is the repeated link Psubframe time of RN, and the back is that sending out of RN received change-over time again, has considered that eNB can effectively receive the time of relaying zone Psubframe this change-over time.According to the demand of professional and power system capacity, Psubframe can be arranged in a plurality of subframe, and is the part of subframe.In addition, be 6: 3 frame structures at the descending sub frame of the former LTE system that comprises repeated link and access link and the proportioning of sub-frame of uplink, in this frame structure, choose and be combined as [7 as the subframe of repeated link, 8], can choose subframe 7 as the downlink relay link subframe, choose subframe 8 as the relay uplink subframe; Otherwise or, choose subframe 7 as the relay uplink subframe, choose subframe 8 as the downlink relay link subframe; Or choose in the subframe [3,7,8,9] one or more as the downlink relay link subframe, and remaining subframe is as the relay uplink subframe, and more than or equal to 1, and subframe 3 only can be used as the relay uplink subframe as the quantity of relay uplink subframe.

As seen, in the present embodiment, be the subframe of in frame structure choosing at 6: 3 for the repeated link transmission by the proportioning at descending sub frame and sub-frame of uplink, in use continuing, to meet with proportioning when link carries out transfer of data be the inherent constraint of the Rel-8 of 6: 3 o'clock LTE systems, and by using LTE/LTE-A TDD repeater frame that the LTE/LTE-A system is covered expansion, so that throughput strengthens.

The proportioning that the embodiment of the invention three proposes a kind of LTE/LTE-A tdd frame is that the proportioning of descending sub frame and sub-frame of uplink is 3: 1 frame structure, and in the present embodiment, the position corresponding relation of UL grant and PUSCH is as shown in table 6.For example, if UE at the UL grant of subframe 3 reception PDCCH, can send the PUSCH channel at the subframe7 of this frame, UE receives UL grant in subframe 8, can be at the subframe2 of lower 1 frame transmission PUSCH channel.

Table 6

PHICH and UL ACK/NACK position corresponding relation are as shown in table 7.What have identical patterns in the table 7 is that the correspondence position relation is arranged.

Table 7

In table 7, subframe 0,1,5,6 are used for sending broadcast channel and synchronizing channel, do not choose as repeated link.Subframe 2 and 7 can be received the UL ACK/NACK from above-mentioned subframe (front 1 frame or this frame).Corresponding meeting sends PHICH in subframe 8 when the subframe 2 of this frame and subframe 7 send data, when the subframe 7 of upper 1 frame sends data, and can be at the subframe 3 transmission PHICH of this frame.Needs use subframe 4 and subframe 9 are descending and up as repeated link, namely can choose subframe [3,4,8,9] one or more in are as the downlink relay link subframe, and are remaining as the relay uplink subframe, are used as the quantity of relay uplink subframe more than or equal to 1.Particularly, can use subframe 4 as the DL of repeated link, namely eNB is to RN, uses up as repeated link of subframe 9, and namely RN is to eNB, otherwise or, choose subframe 4 as the relay uplink subframe, choose subframe 9 and be used as the downlink relay link subframe.

As shown in figure 10, be a kind of frame structure schematic diagram that the embodiment of the invention three proposes, can adopt subframe 4 as the DL of repeated link, namely eNB-＞RN adopts subframe 9 as the UL of repeated link, i.e. RN-＞eNB.Pattern AC in subframe 4 and subframe 9 represents to be dealt into for RN and receives and receive the change-over time of sending out.This length can be adjusted to distance and the actual reiving/transmitting state of RN according to eNB change-over time.Optionally, when former DL subframe is used as relay sub-frame, front several OFDMsymbol of this subframe can be used for access link eNB-＞UE and RN-＞UE, the DL control channel, PCIFICH, control signal and/or the pilot tones such as PHICH, being inserted with of this pilot tone help carry out the channel estimating interpolation between the pilot tone of access link subframe in front and this pilot tone, help to improve the performance of channel estimating.

As seen, in the present embodiment, be the subframe of in frame structure choosing at 3: 1 for the repeated link transmission by the proportioning at descending sub frame and sub-frame of uplink, in use continuing, to meet with proportioning when link carries out transfer of data be the inherent constraint of the Rel-8 of 3: 1 o'clock LTE systems, and by using LTE/LTE-A TDD repeater frame that the LTE/LTE-A system is covered expansion, so that throughput strengthens.

The proportioning that the embodiment of the invention four proposes a kind of LTE/LTE-A tdd frame is that the proportioning of descending sub frame and sub-frame of uplink is 7: 2 frame structure, in the present embodiment, PHICH and UL ACK/NACK position corresponding relation are as shown in table 8, and the position corresponding relation of UL grant and PUSCH is as shown in table 9.

Table 8

Table 9

Can see subframe 0,1 from table 8 and table 9,5,6 can not be as repeated link, and its corresponding UL ACK/NACK all has transmission in 2 UL subframes, so select the DL subframe respectively as DL and the UL of repeated link, namely can choose subframe [4,7,8,9] one or more in are as the downlink relay link subframe, remaining as the repeated link sub-frame of uplink, be used as the quantity of relay uplink subframe more than or equal to 1.As shown in figure 11, a kind of complete frame assumption diagram that comprises repeated link and access link for the embodiment of the invention four propositions, can select DL subframe 4 as eNB-＞RN, DL subframe 7 is as RN-＞eNB, perhaps, get subframe 4 as the relay uplink subframe, choose subframe 7 as the downlink relay link subframe.

As seen, in the present embodiment, be the subframe of in frame structure choosing at 7: 2 for the repeated link transmission by the proportioning at descending sub frame and sub-frame of uplink, in use continuing, to meet with proportioning when link carries out transfer of data be the inherent constraint of the Rel-8 of 7: 2 o'clock LTE systems, and by using LTE/LTE-A TDD repeater frame that the LTE/LTE-A system is covered expansion, so that throughput strengthens.

The proportioning that the embodiment of the invention five proposes a kind of LTE/LTE-A tdd frame is that the proportioning of descending sub frame and sub-frame of uplink is 2: 2 frame structure.Similarly, according to the inherent constraint of LTE R-8 under this proportioning as can be known, DL subframe [0,1,5,6] and UL subframe [2,7] be not suitable for repeated link, so can choose subframe [3,4,8,9] one or more in are as the downlink relay link subframe, remaining subframe is as the relay uplink subframe, and more than or equal to 1, and subframe 3 and subframe 8 only can be used as the relay uplink subframe as the quantity of relay uplink subframe.

As shown in figure 12, be a kind of frame assumption diagram that the embodiment of the invention five proposes, in the present embodiment, when having 2 pairs of repeated links among the 10ms, the transmitting-receiving of relaying is placed in the subframe of repeated link place change-over time.Because can be according to actual needs, as RN apart from eNB far and near and transmitting-receiving/receipts adjust this value change-over time, they also can be placed on the UL position adjacent with the DL relay sub-frame.This repeated link Psubframe place subframe is [3,4,8,9].

Above-mentioned is 2 pairs of repeated links in the 10ms frame structure, also can only have 1 pair of repeated link, as shown in figure 13, another kind of frame assumption diagram for the embodiment of the invention five propositions, what wherein the transmitting-receiving at repeated link place can be implied change-over time shows in frame structure, namely by informing the RN transmitting time or receiving deadline of eNB, also can be explicit by AC area identification among the figure out.Be combined as [3,9] among the figure, namely subframe 9 is as eNB-＞RN, and subframe 3 is as RN-＞eNB.In addition, when being combined as [4,8], choose subframe 4 as the downlink relay link subframe, choose subframe 8 as the relay uplink subframe; When being combined as [3,4,8,9], choose subframe 4,9 as the downlink relay link subframe, choose subframe 3,8 as the relay uplink subframe.

As seen, in the present embodiment, be the subframe of in frame structure choosing at 2: 2 for the repeated link transmission by the proportioning at descending sub frame and sub-frame of uplink, in use continuing, to meet with proportioning when link carries out transfer of data be the inherent constraint of the Rel-8 of 2: 2 o'clock LTE systems, and by using LTE/LTE-A TDD repeater frame that the LTE/LTE-A system is covered expansion, so that throughput strengthens.

The proportioning that the embodiment of the invention six proposes a kind of LTE/LTE-A tdd frame is that the proportioning of descending sub frame and sub-frame of uplink is 3: 5 frame structure, as shown in figure 14, and for combination [4,9] is used as repeated link Psubframe place subframe.Subframe 4 is up links, is used for RN-＞eNB, and subframe 9 is down links, is used for eNB-＞RN, has and top similar control channel in subframe 9.Because the repeated link subframe has guard time, so also can not draw guard time among the figure near the position of original system up-downgoing conversion in the original system.Pattern AB in the 9th subframe front represents respectively the access link of eNB-＞UE_eNB and RN-＞UE_RN, and its length can be a kind of among 1,2,3,4 symbol can send pilot tone, perhaps pilot tone and DCCH, PHICH, the control signals such as PCFICH.

As seen, in the present embodiment, be the subframe of in frame structure choosing at 3: 5 for the repeated link transmission by the proportioning at descending sub frame and sub-frame of uplink, in use continuing, to meet with proportioning when link carries out transfer of data be the inherent constraint of the Rel-8 of 3: 5 o'clock LTE/LTE-A systems, and by using the LTE/LTE-ATDD repeater frame that the LTE/LTE-A system is covered expansion, so that throughput strengthens.

The proportioning that the embodiment of the invention seven proposes a kind of LTE/LTE-A tdd frame is that the proportioning of descending sub frame and sub-frame of uplink is 8: 1 frame structure.Similarly, according to the inherent constraint of LTE R-8 under this proportioning as can be known, DL subframe [0,1,5,6] and UL subframe [2] be not suitable for repeated link, so can choose subframe [3,4,7,8,9] one or more in are as the downlink relay link subframe, remaining subframe is used as the quantity of relay uplink subframe more than or equal to 1 as the relay uplink subframe.

As shown in figure 15; the proportioning of the LTE/LTE-A tdd frame that proposes for the embodiment of the invention seven is that the proportioning of descending sub frame and sub-frame of uplink is a kind of frame assumption diagram of 8: 1; choose DL subframe 3 and be used for relay uplink RN to eNB; DL subframe [7; 8; 9] be used as downlink relay link eNB to RN; and DL subframe [7; 8; 9] all be the MBSFN subframe; front 1,2 of each subframe or 3 OFDM symbol are unicast parts in these descending sub frames, are used for the repeated link transmission between RN and the eNB remaining time, and guard time (shown in pattern AC).Wherein the unicast of DL subframe 8 is used for sending the DL pilot tone, and control channel, PCFICH, and PHICH, the unicast of DL subframe 7 and DL subframe 8 are used for sending the DL pilot tone.

In the frame structure that proposes in the embodiment of the invention seven, being used for original descending sub frame of UL or DL repeated link, also can be the MBSFN subframe in LTE/LTE-A TDD system; and the unicast part of MBSFN subframe; be used for sending the DL pilot tone, and/or control signal, such as control channel; PCFICH; PHICH, the remaining time is used for the repeated link transmission between RN and the eNB, and guard time; the method applicable to the situation to other proportioning, does not repeat them here yet.

In all above-mentioned embodiment; the guard time of this relay sub-frame comprises the guard time of downlink relay sub-frame and the guard time of uplink relay subframe; guard time for downlink relay sub-frame; such as the subframe 7 among Fig. 7 and subframe 8; when transmission time (free time) during greater than change-over time (RN receives the change-over time of sending out or be dealt into receipts); for the repeater frame at RN place, take Psubframe place subframe 7 as example, need the guard time in this subframe is divided into 2 parts.Guard time RGPb (relaying guard time rear portion) behind guard time RGPf before the Psubframe (the relaying guard time is anterior) and the Psubframe, the guard time RGPf=transmission time of Psubframe front, (RN was to the transmission time of eNB, the below is referred to as the transmission time), the guard time=RN of Psubframe back is dealt into the change-over time of receipts (lower be called for short RN change-over time); In Fig. 7, the relay sub-frame 7 that the repeater frame at corresponding eNB place is corresponding, RGPf=0, RGPb=transmission time+RN receive change-over time of sending out (lower the RN of abbreviation change-over time).In all above-mentioned embodiment, the method for choosing guard time when the DL subframe is used as relay sub-frame is identical.When transmission time during less than change-over time, the relay sub-frame 7 of RN place repeater frame, RGPf=RN change-over time, RGPb=RN change-over time.The relay sub-frame 7 corresponding to repeater frame at corresponding eNB place, RGPf=0, RGPb=RN change-over time and RN change-over time with.

For the guard time of uplink relay subframe, comprise that descending sub frame is used as the guard time of UL relay sub-frame and the guard time that sub-frame of uplink is done uplink relay subframe.For descending sub frame as the guard time of UL relay sub-frame, such as the subframe 9 among Fig. 9, when transmission time during greater than change-over time, in the subframe 9 of RN repeater frame, RGPf=RN change-over time, RGPb=transmission time; In the subframe 9 of eNB repeater frame, RGPf=RN change-over time+transmission time, RGPb=0.When transmission time during less than change-over time, in the subframe 9 of RN repeater frame, RGPf=RN change-over time, RGPb=change-over time; In the subframe 9 of eNB repeater frame, RGPf=RN change-over time+transmission time, RGPb=change-over time-transmission time.Do the guard time of uplink relay subframe for sub-frame of uplink, such as the subframe 3 among Fig. 7.When transmission time during greater than change-over time, in the subframe 3 of RN repeater frame, RGPf=RN change-over time, RGPb=transmission time; In the subframe 3 of eNB repeater frame, RGPf=RN change-over time+transmission time, RGPb=0.When transmission time during less than change-over time, in the subframe 3 of RN repeater frame, RGPf=RN change-over time, RGPb=change-over time; In the subframe 3 of eNB repeater frame, RGPf=RN change-over time+transmission time, RGPb=change-over time-transmission time.

Above-mentioned by change-over time, the guard time of arbitrary or multiple composition of transmission time and Idle time also can not show in frame structure as adjusting in the timing adjustment in signaling by sending both sides.

The embodiment of the invention eight has also proposed a kind of communication equipment, as shown in figure 16, comprise: choose module 151, be used for choosing the subframe of TDD repeater frame as the repeated link subframe, subframe comprises as the repeated link subframe in the described TDD of the choosing repeater frame: choose in the TDD repeater frame descending sub frame as the downlink relay link subframe and/or choose in the TDD repeater frame descending sub frame as the relay uplink subframe, and/or choose in the TDD repeater frame sub-frame of uplink as the relay uplink subframe; Transport module 152 is used for carrying out relay transmission according to choosing module 151 repeated link subframes.

To describe as example in the LTE/LTE-A system, further, this is chosen module 151 and comprises in the embodiment of the invention:

First chooses unit 1511, is used for when the proportioning of descending subframe and sub-frame of uplink is 6: 3, chooses subframe 3 as the relay uplink subframe, chooses subframe 7 and subframe 8 as the downlink relay link subframe; Or choose subframe 3 as the relay uplink subframe, choose subframe 7 and subframe 8 and subframe 9 as the downlink relay link subframe; Or choose subframe 7 as the downlink relay link subframe, choose subframe 9 as the relay uplink subframe; Or choose subframe 7 as the relay uplink subframe, choose subframe 9 as the downlink relay link subframe; Or choose subframe 7 as the downlink relay link subframe, choose subframe 8 as the relay uplink subframe; Or choose subframe 7 as the relay uplink subframe, choose subframe 8 as the downlink relay link subframe; Or choose in the subframe [3,7,8,9] one or more as the downlink relay link subframe, and remaining subframe is as the relay uplink subframe, and more than or equal to 1, and subframe 3 only can be used as the relay uplink subframe as the quantity of relay uplink subframe.

Second chooses unit 1512, is used for when the proportioning of this descending sub frame and sub-frame of uplink is 3: 1, chooses subframe 4 as the downlink relay link subframe, chooses subframe 9 as the relay uplink subframe; Or choose subframe 4 as the relay uplink subframe, choose subframe 9 as the downlink relay link subframe; Or choose in the subframe [3,4,8,9] one or more as the downlink relay link subframe, remaining as the relay uplink subframe, as the quantity of relay uplink subframe more than or equal to 1.

The 3rd chooses unit 1513, is used for when the proportioning of this descending sub frame and sub-frame of uplink is 7: 2, chooses subframe 4 as the downlink relay link subframe, chooses subframe 7 as the relay uplink subframe; Or choose subframe 4 as the relay uplink subframe, choose subframe 7 as the downlink relay link subframe; Or choose in the subframe [4,7,8,9] one or more as the downlink relay link subframe, remaining as the relay uplink subframe, as the quantity of relay uplink subframe more than or equal to 1.

The 4th chooses unit 1514, is used for when the proportioning of this descending sub frame and sub-frame of uplink is 2: 2, chooses subframe 9 as the downlink relay link subframe, chooses subframe 3 as the relay uplink subframe; Or choose subframe 4 as the downlink relay link subframe, choose subframe 8 as the relay uplink subframe; Or choose subframe 4 and subframe 9 as the downlink relay link subframe, choose subframe 3 and subframe 8 as the relay uplink subframe; Or choose subframe [3,4,8,9] one or more in are as the downlink relay link subframe, remaining subframe is as the relay uplink subframe, and more than or equal to 1, and subframe 3 and subframe 8 only can be used as the relay uplink subframe as the quantity of relay uplink subframe.

The 5th chooses unit 1515, is used for when the proportioning of this descending sub frame and sub-frame of uplink is 3: 5, chooses subframe 9 as the downlink relay link subframe, chooses subframe 4 as the relay uplink subframe.

The 6th chooses unit 1516, be used for when the proportioning of described descending sub frame and sub-frame of uplink is 8: 1, choose subframe [3,4,7,8,9] one or more in are as the downlink relay link subframe, remaining as the repeated link sub-frame of uplink, be used as the quantity of relay uplink subframe more than or equal to 1.

The communicator of the embodiment of the invention can be used above-mentioned each embodiment of the method, pass through the embodiment of the invention, communication equipment is when carrying out transfer of data, chosen the subframe that can be used for the repeated link transmission, in use continue and meet tdd frame structure inherent constraint in the prior art when link carries out transfer of data, and the system that uses the TDD repeater frame covered expansion, so that throughput strengthens.

Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by hardware, also can realize by the mode that software adds necessary general hardware platform.Based on such understanding, technical scheme of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions with so that computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.

The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be looked protection scope of the present invention.

Claims

1. the method for a relay transmission, it is characterized in that, when the LTE/LTE-A repeater frame is in the LTE/LTE-A system during uplink/downlink proportioning UL/DL Configuration3, described LTE/LTE-A repeater frame comprises that subframe index is 10 subframes of 0 to 9, wherein subframe 1 is special subframe, subframe 0,5,6,7,8 and 9 is descending sub frame, and subframe 2,3 and 4 is sub-frame of uplink;

Evolution base station eNB is carried out relay transmission with described RN on from described eNB to the downlink relay link the relay station RN;

Described eNB carries out relay transmission with described RN on from described RN to the relay uplink the described eNB;

Wherein, subframe 3 is selected as the relay uplink subframe in the described LTE/LTE-A repeater frame, and subframe 7 and subframe 8 are selected as the downlink relay link subframe; Or subframe 3 is selected as the relay uplink subframe, and subframe 7 and subframe 8 and subframe 9 are selected as the downlink relay link subframe; Or subframe 7 is selected as the downlink relay link subframe, and subframe 9 is selected as the relay uplink subframe; Or subframe 7 is selected as the relay uplink subframe, and subframe 9 is selected as the downlink relay link subframe; Or subframe 7 is selected as the downlink relay link subframe, and subframe 8 is selected as the relay uplink subframe; Or subframe 7 is selected as the relay uplink subframe, and subframe 8 is selected as the downlink relay link subframe; Or one or more in the subframe [3,7,8,9] are selected as the downlink relay link subframe, and subframe 3 only can be used as the relay uplink subframe, and quantity is selected as the relay uplink subframe more than or equal to 1 subframe in remaining subframe.

2. method according to claim 1, it is characterized in that, also comprise: the access link that top n orthogonal frequency division multiplex OFDM symbol is selected as between the subscriber equipment of access link transmission between the subscriber equipment of relay station and relay station service or base station and base station service in the described downlink relay link subframe transmits, be used for sending descending pilot frequency, perhaps descending pilot frequency and control signal, M OFDM symbol arranged in the described downlink relay link subframe, and described M, N are natural number, and N is less than M.

3. method as claimed in claim 2 is characterized in that, described N is 1,2,3 or 4.

4. such as claim 1,2 or 3 described methods, it is characterized in that described downlink relay link sub-frame configuration is multicast single frequency network MBSFN subframe.

5. evolution base station eNB, it is characterized in that, when the LTE/LTE-A repeater frame is in the LTE/LTE-A system during uplink/downlink proportioning UL/DL Configuration3, described LTE/LTE-A repeater frame comprises that subframe index is 10 subframes of 0 to 9, wherein subframe 1 is special subframe, subframe 0,5,6,7,8 and 9 is descending sub frame, and subframe 2,3 and 4 is sub-frame of uplink; Described eNB comprises:

Be used for carrying out with described RN on from described eNB to the downlink relay link the relay station RN unit of relay transmission; And

Be used for carrying out with described RN on from described RN to the relay uplink the described eNB unit of relay transmission;

6. eNB according to claim 5, it is characterized in that, the access link that top n OFDM symbol is selected as between the subscriber equipment of access link transmission between the subscriber equipment of relay station and relay station service or base station and base station service in the described downlink relay link subframe transmits, be used for sending descending pilot frequency, perhaps descending pilot frequency and control signal, M OFDM symbol arranged in the described downlink relay link subframe, and described M, N are natural number, and N is less than M.

7. the method for a relay transmission, it is characterized in that, when the LTE/LTE-A repeater frame is in the LTE/LTE-A system during uplink/downlink proportioning UL/DL Configuration3, described LTE/LTE-A repeater frame comprises that subframe index is 10 subframes of 0 to 9, wherein subframe 1 is special subframe, subframe 0,5,6,7,8 and 9 is descending sub frame, and subframe 2,3 and 4 is sub-frame of uplink;

Relay station RN carries out relay transmission with described eNB on from evolution base station eNB to the downlink relay link the described RN;

Described RN carries out relay transmission with described eNB on from described RN to the relay uplink the described eNB;

8. method according to claim 7, it is characterized in that, also comprise: the access link that top n orthogonal frequency division multiplex OFDM symbol is selected as between the subscriber equipment of access link transmission between the subscriber equipment of relay station and relay station service or base station and base station service in the described downlink relay link subframe transmits, be used for sending descending pilot frequency, perhaps descending pilot frequency and control signal, M OFDM symbol arranged in the described downlink relay link subframe, and described M, N are natural number, and N is less than M.

9. method as claimed in claim 8 is characterized in that, described N is 1,2,3 or 4.

10. such as claim 7,8 or 9 described methods, it is characterized in that described downlink relay link sub-frame configuration is multicast single frequency network MBSFN subframe.

11. relay station RN, it is characterized in that, when the LTE/LTE-A repeater frame is in the LTE/LTE-A system during uplink/downlink proportioning UL/DL Configuration3, described LTE/LTE-A repeater frame comprises that subframe index is 10 subframes of 0 to 9, wherein subframe 1 is special subframe, subframe 0,5,6,7,8 and 9 is descending sub frame, and subframe 2,3 and 4 is sub-frame of uplink; Described RN comprises:

Be used for carrying out with described eNB on from evolution base station eNB to the downlink relay link the relay station RN unit of relay transmission; And

Be used for carrying out with described eNB on from described RN to the relay uplink the described eNB unit of relay transmission;

12. RN according to claim 11, it is characterized in that, the access link that top n OFDM symbol is selected as between the subscriber equipment of access link transmission between the subscriber equipment of relay station and relay station service or base station and base station service in the described downlink relay link subframe transmits, be used for sending descending pilot frequency, perhaps descending pilot frequency and control signal, M OFDM symbol arranged in the described downlink relay link subframe, and described M, N are natural number, and N is less than M.

13. the method for a relay transmission is characterized in that, comprising:

Choose subframe in the TDD repeater frame as the repeated link subframe, described TDD repeater frame is LTE/LTE-A TDD repeater frame, when the LTE/LTE-A repeater frame is in the LTE/LTE-A system during uplink/downlink proportioning UL/DL Configuration3, described LTE/LTE-A repeater frame comprises that subframe index is 10 subframes of 0 to 9, wherein subframe 1 is special subframe, subframe 0,5,6,7,8 and 9 is descending sub frame, and subframe 2,3 and 4 is sub-frame of uplink;

Subframe in the described TDD of the choosing repeater frame comprises as the repeated link subframe: choose subframe 3 as the relay uplink subframe, choose subframe 7 and subframe 8 as the downlink relay link subframe; Or, choose subframe 3 as the relay uplink subframe, choose subframe 7 and subframe 8 and subframe 9 as the downlink relay link subframe; Or, choose subframe 7 as the downlink relay link subframe, choose subframe 9 as the relay uplink subframe; Or, choose subframe 7 as the relay uplink subframe, choose subframe 9 as the downlink relay link subframe; Or, choose subframe 7 as the downlink relay link subframe, choose subframe 8 as the relay uplink subframe; Or, choose subframe 7 as the relay uplink subframe, choose subframe 8 as the downlink relay link subframe; Or, choose in the subframe [3,7,8,9] one or more as the downlink relay link subframe, and subframe 3 only can be used as the relay uplink subframe, in remaining subframe, choose quantity and be used as the relay uplink subframe more than or equal to 1 subframe;

Carry out relay transmission according to described repeated link subframe.

14. method according to claim 13, it is characterized in that, also comprise: choose top n orthogonal frequency division multiplex OFDM symbol in the described downlink relay link subframe and transmit as the access link between the subscriber equipment of the access link transmission between the subscriber equipment of relay station and relay station service or base station and base station service, be used for sending descending pilot frequency, perhaps descending pilot frequency and control signal, M OFDM symbol arranged in the described downlink relay link subframe, and described M, N are natural number, and N is less than M.

15. such as claim 13 or 14 described methods, it is characterized in that,

Describedly carry out relay transmission according to described repeated link subframe and comprise:

Carry out communicating by letter between the subscriber equipment of base station and base station service according to described repeated link subframe; And/or

Carry out communicating by letter between base station and the relay station according to described repeated link subframe; And/or

Carry out communicating by letter between the subscriber equipment of relay station and relay station service according to described repeated link subframe.

16. method as claimed in claim 14 is characterized in that, described N is 1,2,3 or 4.

17., it is characterized in that described downlink relay link sub-frame configuration is multicast single frequency network MBSFN subframe such as claim 13,14 or 16 described methods.

18. a communication equipment is characterized in that, comprising:

Choose module, be used for choosing the subframe of TDD repeater frame as the repeated link subframe;

Transport module is used for choosing the repeated link subframe that module chooses and carrying out relay transmission according to described;

The described module of choosing comprises that first chooses the unit, be used for when the frame structure of described TDD repeater frame is the tdd frame structure of the UL/DL Configuration3 of LTE/LTE-A system, choose subframe 3 as the relay uplink subframe, choose subframe 7 and subframe 8 as the downlink relay link subframe; Or choose subframe 3 as the relay uplink subframe, choose subframe 7 and subframe 8 and subframe 9 as the downlink relay link subframe; Or choose subframe 7 as the downlink relay link subframe, choose subframe 9 as the relay uplink subframe; Or choose subframe 7 as the relay uplink subframe, choose subframe 9 as the downlink relay link subframe; Or choose subframe 7 as the downlink relay link subframe, choose subframe 8 as the relay uplink subframe; Or choose subframe 7 as the relay uplink subframe, choose subframe 8 as the downlink relay link subframe; Or choose in the subframe [3,7,8,9] one or more as the downlink relay link subframe, and subframe 3 only can be used as the relay uplink subframe, chooses quantity and be used as the relay uplink subframe more than or equal to 1 subframe in remaining subframe.

19. communication equipment according to claim 18, it is characterized in that, the described module of choosing is used for choosing this downlink relay link subframe top n OFDM symbol as the access link transmission between the subscriber equipment of the access link transmission between the subscriber equipment of relay station and relay station service or base station and base station service, be used for sending descending pilot frequency, perhaps descending pilot frequency and control signal, M OFDM symbol arranged in the described downlink relay link subframe, and described M, N are natural number, and N is less than M.