CN101741452B - Relay transmission method and network node - Google Patents

Relay transmission method and network node Download PDF

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Publication number
CN101741452B
CN101741452B CN2009101374523A CN200910137452A CN101741452B CN 101741452 B CN101741452 B CN 101741452B CN 2009101374523 A CN2009101374523 A CN 2009101374523A CN 200910137452 A CN200910137452 A CN 200910137452A CN 101741452 B CN101741452 B CN 101741452B
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subframe
frame
repeated link
sub
option
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CN101741452A (en
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栗忠峰
尚政
谷蓉婷
金炜
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN2009101374523A priority Critical patent/CN101741452B/en
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to JP2011534997A priority patent/JP5362020B2/en
Priority to RU2011122823/07A priority patent/RU2486711C2/en
Priority to PCT/CN2009/075198 priority patent/WO2010051780A1/en
Priority to BRPI0921215-9A priority patent/BRPI0921215B1/en
Priority to KR1020117012038A priority patent/KR101267403B1/en
Priority to EP09824435.3A priority patent/EP2339891B1/en
Priority to MYPI2011002050A priority patent/MY156554A/en
Priority to KR1020127032980A priority patent/KR20130004394A/en
Publication of CN101741452A publication Critical patent/CN101741452A/en
Priority to US13/103,627 priority patent/US8897199B2/en
Priority to JP2013182014A priority patent/JP5554869B2/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
    • H04B7/15542—Selecting at relay station its transmit and receive resources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2603—Arrangements for wireless physical layer control
    • H04B7/2606—Arrangements for base station coverage control, e.g. by using relays in tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/002—Transmission of channel access control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/047—Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H04L2001/0097—Relays

Abstract

The embodiment of the invention discloses a relay transmission method and a network node. The relay transmission method comprises the following steps of: receiving configuration information of a relay link subframe which is configured in a subframe taking an integral multiple frame as a cycle and has a specific mixed automatic retransmission HARQ time sequence; and performing relay link transmission according to the relay link subframe. In the embodiment of the invention, when the relay transmission is performed according to the selected relay link subframe, the method and the network node satisfy various constraints of an LTEFDD system, and can be backwards compatible with UE in the existing LTE system.

Description

Relay transmission method and network node
Technical field
The present invention relates to communication technical field, particularly a kind of relay transmission method and network node.
Background technology
Along with progress and the development of wireless communication devices of society, traffic rate and communication quality there has been higher demand.This demand has been satisfied in wire transmission to a certain extent, yet wire transmission objectively requires operator to lay optical cable or rents cable resource, and this has caused constraint to the use of wire transmission undoubtedly.Use relay (relaying) to transmit the very big concern that has caused industry in recent years as wireless backhaul.The relay technology can be carried out cell coverage expansion, the homogenizing of cell capacity lifting and cell throughout.
The frame structure of LTE system is unit with frame (frame), and 10 subframe (subframe) are arranged in each frame, and each subframe is fixed as 1ms.Because LTE to LTE-Advanced (senior Long Term Evolution) evolution, can LTE occur in a very long time and LTE-A is network coexisted.Use the relay technology at LTE-A/LTE, need to consider the technical characterictic of existing LTE system version R8, to guarantee the UE of R8 in the compatible LTE system version.
But, when carrying out relay transmission according to the frame structure that proposes in the prior art scheme, the UE in can't effective compatible LTE system version R8.
Summary of the invention
The embodiment of the invention provides a kind of relay transmission method and network node, to guarantee the UE in can the existing LTE system of backward compatibility.
The embodiment of the invention provides a kind of relay transmission method on the one hand, comprising:
Receive the repeated link subframe configuration information, described repeated link subframe is configured in the subframe that with the integral multiple frame is the cycle, has specific mixing and retransmits the HARQ sequential automatically; Carry out the repeated link transmission according to described repeated link subframe.
On the other hand, the embodiment of the invention also provides a kind of relay transmission transmission method to comprise:
Carry out transfer of data according to the repeated link subframe of selecting;
Reserve guard time in the repeated link subframe of selecting, the length of described guard time is specially the integral multiple in LTE sampling interval, and/or the length of described guard time is adjusted in signaling by sending both sides;
Comprise one or two Block Guard Times in the described repeated link subframe, described guard time is positioned at the front of the used resource of repeated link, and/or the back of the used resource of repeated link.。
On the one hand, the embodiment of the invention also provides a kind of data transmission method again, and this method comprises:
In LTE FDD system, be the cycle to select specific sub-frame with the integral multiple frame;
Described selecteed specific sub-frame is used for the LTE-A terminal and communicates, and is that nonspecific subframe in the cycle is used for the LTE-A terminal and the LTE terminal communicates at described integral multiple frame.
On the one hand, the embodiment of the invention also provides a kind of network node, comprising again:
Receiver module is used for receiving the repeated link sub-frame information, and described repeated link subframe is configured in the subframe that with the integral multiple frame is the cycle, has specific mixing and retransmits the HARQ sequential automatically;
Transport module carries out the repeated link transmission according to the definite repeated link subframe of repeated link sub-frame information that described receiver module receives.
The embodiment of the invention is the configuration of the cycle carrying out the repeated link subframe with the integral multiple of frame in the LTE system, carries out relay transmission according to this repeated link subframe, and this repeated link subframe has specific HARQ sequential.The relay transmission method that the embodiment of the invention proposes has satisfied the various constraints of LTE FDD system, and the UE in can backward compatibility LTE system.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 a is the flow chart of a kind of relay transmission method of the embodiment of the invention;
Fig. 1 b is the flow chart of a kind of relay transmission method of another embodiment of the present invention;
Fig. 2 is the schematic diagram of embodiment of the invention relay transmission pattern;
Fig. 3 can be used for the option of repeated link subframe for embodiment of the invention LTE FDD system;
Fig. 4 a is in the embodiment of the invention LTE system, the schematic diagram of MBSFN subframe;
Fig. 4 b is a kind of frame structure schematic diagram in the embodiment of the invention;
Fig. 4 c is a kind of frame structure schematic diagram in the embodiment of the invention;
Fig. 4 d is a kind of frame structure schematic diagram in the embodiment of the invention;
Fig. 5 is the protection interval schematic diagram in the embodiment of the invention repeated link subframe;
Fig. 6 utilizes the schematic diagram of MBSFN subframe clean culture OFDM symbol for embodiment of the invention part guard time;
Fig. 7 is among the embodiment of the invention Type1, the schematic diagram that the guard time when eNB and the skew of Relay subframe is followed the example of;
Fig. 8 does not utilize the schematic diagram of MBSFN subframe clean culture OFDM symbol for embodiment of the invention guard time;
Fig. 9 does not utilize the schematic diagram of the clean culture OFDM symbol of MBSFN subframe for embodiment of the invention guard time;
Figure 10 a is among the embodiment of the invention Type2, and the guard time when eNB and the skew of RN subframe is followed the example of schematic diagram;
Figure 10 b is a kind of frame structure schematic diagram that disposes the repeated link subframe in the embodiment of the invention;
Figure 10 c is the frame structure schematic diagram of another kind of configuration repeated link subframe in the embodiment of the invention;
Figure 10 d is the frame structure schematic diagram of another kind of configuration repeated link subframe in the embodiment of the invention;
Figure 10 e is the frame structure schematic diagram of another kind of configuration repeated link subframe in the embodiment of the invention;
Figure 10 f is the frame structure schematic diagram of another kind of configuration repeated link subframe in the embodiment of the invention;
Figure 10 g is the frame structure schematic diagram of another kind of configuration repeated link subframe in the embodiment of the invention;
Figure 10 h is the frame structure schematic diagram of another kind of configuration repeated link subframe in the embodiment of the invention;
Figure 10 i is the frame structure schematic diagram of another kind of configuration repeated link subframe in the embodiment of the invention;
Figure 11 is in the UNE of embodiment of the invention LTE and LTE-A, the transmission mode schematic diagram of eNB, UE_LTE and UE_LTE_A;
Figure 12 is the structure chart of a kind of network node of the embodiment of the invention.
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.
In the LTE system, frame structure need satisfy following requirement:
(1) PUSCH (Physical Uplink Shared Channel, Physical Uplink Shared Channel) vs.PHICH (Physical HARQ Indication Channel, the physical mixed automatic re-transmission indicating channel), be that UE sends PUSCH at subframe n, correspondingly can receive PHICH at subframe n+k, wherein k is the ACK/NACK feedback interval of upstream data, k=4 in LTE FDD R8; The content of this PUSCH comprises the upstream data that UE sends at least, and the content of this PHICH is ACK (Acknowledgement confirms)/NACK (Nonacknowledgement denies) feedback that subframe n is sent data among the PUSCH.
(2) UL (Uplink, up) HARQ (Hybrid Automatic Repeat Request mixes automatic repeat requests) PUSCH re-transmission period, i.e. UE transmit ascending data piece first on subframe n, when retransmitting this data block if desired, then can only carry out at subframe n+k*L, wherein k is re-transmission period, and L is number of retransmissions, value is 1,2,3 ... L Max, L MaxBe the maximum retransmission of system configuration, k=8 in LTE FDD R8.
(3) PHICH/UL grant vs.PUSCH (n+4), be that UE receives the PHICH/UL grant that sends to this UE at subframe n, then this UE can adjust PUSCH at subframe n+k according to the indication of this PHICH/UL grant, wherein k is the interval between PHICH/UL grant indication and UL data channel send, k=4 in LTE FDD R8; This adjustment refers to that when the content among the PHICH is ACK then the PUSCH on subframe n+4 sends new data; When the content among the PHICH was NACK, then the PUSCH on subframe n+4 retransmitted the data that send before; Or send data according to the indication of ULgrant at the corresponding ascending resource of subframe n+4.
(4) PDSCH (Physical Downlink Shared Channel, Physical Downlink Shared Channel) vs.UL ACK/NACK, be that UE receives the data channel PDSCH that sends to this UE at subframe n, at subframe n+k feedback UL ACK/NACK, wherein k is the ACK/NACK feedback interval of downlink data, k=4 in LTE FDD R8.
(5) P/D-BCH (Primary/Dynamic Broadcast Channel, master/Dynamic Broadcast Channel), P/S-SCH (Primary/Secondary Synchronization Channel, primary/secondary synchronizing channel) fixed position of subframe, namely in LTE FDD system, stipulate, P/S-SCH is positioned at subframe0 and the subframe 5 of each frame, P-BCH is positioned at the subframe 0 of each frame, SIB1 among the D-BCH is positioned at the subframe 5 of even number frame, and D-BCH sends in data channel PDSCH, PDCCH (Packet Dedicated Control Channel simultaneously need transmit control channel, the grouping Dedicated Control Channel), PCFICH (Physical Control Format Indication Channel, Physical Control Format Indicator Channel).
(6) position of Paging message: system is configured the position that the beep-page message that sends to UE occurs.In LTE FDD, during Ns=1, Paging message is transmitted at DL (Downlink, descending) subframe9; During Ns=2, Paging message is at DL subframe{4, and 9} transmits; During Ns=4, Paging message is in DL subframe{0,4,5, transmit among the 9}, Ns wherein is the number of times that Paging message takes place in each frame, it and DRX (Discontinuous Reception, discontinuous reception) cycle is relevant, by system configuration, is broadcast to UE then.And Paging message is to transmit in PDSCH, also needs the PDCCH that transmits control channel, PCFICH simultaneously.
For ease of explanation, provide the term definition that this paper is correlated with once:
The HARQ retransmit interval: to the head biography of same data block and the interval between the re-transmission first time, and the interval between adjacent twice re-transmission all is called retransmit interval.
Repeated link: the link between relay station and the base station.
Repeated link subframe: be used for the resource of repeated link transmission, as the subframe at running time-frequency resource place.
The embodiment of the invention proposes a kind of relay transmission method, as shown in Figure 1a, is the flow chart of a kind of relay transmission method of the embodiment of the invention, and this method comprises:
Step S101, in LTE FDD system, integral multiple with frame is that unit period selects subframe as the repeated link subframe, comprise the combination of an elementary cell or a plurality of elementary cells in this unit, this elementary cell is one group of UL subframe and DL subframe, this UL subframe be spaced apart LTE UL HARQ re-transmission period or the multiple of LTE UL HARQ re-transmission period.
In a kind of implementation of the present invention, a part of DL subframe in the DL subframe satisfies the LTEHARQ sequential relationship, is the subframe of PHICH and the UL grant of UL HARQ correspondence; Perhaps, the interval that is spaced apart the UL subframe of DL subframe; Perhaps, DL subframe and UL subframe adopt asynchronous LTE HARQ sequential relationship; Perhaps, the UL grant that sends a plurality of UL subframes in specific DL subframe dispatches and the PHICH feedback information.
In an above-mentioned elementary cell, the UE that relaying DL direction in each frame adopts a DLsubframe to serve to relaying at the most sends the data that need feedback UL ACK/NACK, and this DLsubframe can be DL subframe 0, DL subframe4, DL subframe5 or DL subframe9.
In an above-mentioned elementary cell, the UE that relaying DL direction in each frame adopts a DLsubframe to serve to relaying at the most sends the data that do not need to feed back ULACK/NACK, and this DLsubframe can be DL subframe 0, DL subframe4, DL subframe5 or DL subframe9.
When relaying when DL subframe 0, DL subframe4, DL subframe5 or DL subframe9 send data, do not send UL grant and PHICH, send other control channel among pilot tone and the PDCCH, and PCFICH.
In another kind of implementation of the present invention, the whole DL subframes in the DL subframe satisfy the LTEHARQ sequential relationship, are the subframe of PHICH and the UL grant of UL HARQ correspondence, and the specific sub-frame in this DL subframe partly is used for repeated link; Perhaps, the interval that is spaced apart the UL subframe of this DL subframe.
In the combination of an elementary cell or a plurality of elementary cells, the DL direction has a DL subframe subframe 0 not send data channel PDSCH and control channel PCFICH thereof, PDCCH at the most in each frame.
In DL subframe0, the UE that relay station is served to this relay station sends broadcast channel BCH, synchronous channel SCH and pilot tone.Evolution base station eNB can send PCFICH, PHICH, UL grant and pilot tone to relay station by 1～3 symbol of DL subframe0 front.The pilot tone that the UE that relay station is served to this relay station sends takies different running time-frequency resources with eNB to the pilot tone that relaying sends.
Step S102 carries out relay transmission according to the repeated link subframe of selecting.
Each UL HARQ process of relaying has identical re-transmission period or different re-transmission period with LTE UL HARQ in the repeated link subframe.
Above-mentioned relay transmission method in LTE FDD system, is that the repeated link subframe is selected by unit with the integral multiple of frame, and carries out relay transmission according to this repeated link subframe.The relay transmission method that the embodiment of the invention proposes has satisfied the various constraints of LTE FDD system, and can backward compatibility LTE-R8 UE.
Shown in Fig. 1 b, an alternative embodiment of the invention also provides a kind of relay transmission method, comprising:
S101 ': receive the repeated link subframe configuration information, described repeated link subframe is configured in the subframe that with the integral multiple frame is the cycle, has specific mixing and retransmits the HARQ sequential automatically;
S102 ': carry out the repeated link transmission according to described repeated link subframe.
Namely carry out the transmission of base station and relay station and/or terminal in the repeated link subframe, carry out communicating by letter of base station and/or relay station and terminal use in non-repeated link subframe.
In the method that present embodiment provides, repeated link subframe according to configuration is carried out relay transmission, the subframe of this repeated link subframe in the cycle of integral multiple frame is configured, comprised the configuration to downlink relay link subframe and/or relay uplink subframe, and has specific HARQ sequential, satisfy the UE in the existing LTE system of backward compatibility, realized relay transmission.
As shown in Figure 2, be the schematic diagram of embodiment of the invention relay transmission pattern, eNB, UE_eNB (UE that eNB serves), RN (Relay Node, relay station) carries out orderly communication according to method shown in Figure 2 between these network nodes of UE_RN (UE that RN serves).Among Fig. 2, in T1, carry out simultaneously eNB ↔ UE _ eNB With RN ↔ UE _ RN Communication, in T2, carry out eNB ↔ RN Communication, also can carry out simultaneously eNB ↔ UE _ eNB Communication.T1 wherein, T2 is certain subframe in the LTE system, namely T2 is the repeated link subframe.
Owing on the repeated link subframe, do not carry out RN ↔ UE _ RN Communication, for guaranteeing the UE among the backward compatibility LTE system version R8, require choosing of repeated link subframe, can not influence the proper communication of UE_RN.
The embodiment of the invention has at first provided the choosing method of the repeated link subframe that satisfies above-mentioned requirements, and to descending sub frame subframe{0,4,5,9} carries out two kinds of special processings, is given at last in the LTE FDD system, can guarantee the repeated link transmission method of backward compatibility.
Introduce the choosing method of repeated link subframe below.As shown in Figure 3, for can be used for the option of repeated link subframe in the embodiment of the invention LTEFDD system.Can selecting like this of repeated link subframe: at first in frame nf, choose a UL subframe subframe n who can be used for repeated link, the UL subframe subframe (n+k* γ) of back all can be used for the UL repeated link so; According to LTE HARQ sequential relationship, choose the corresponding descending sub frame of these UL repeated link subframes and be used for the DL repeated link then.If Nf is the number of subframe in the frame, Nf=10 in the LTE system, n can be 0,1,2 ..., Nf-1; γ is UL HARQ re-transmission period, γ among the LTE=8, and k is number of retransmissions, can be 1,2,3 natural numbers such as grade.For UL subframe subframe (n+k* γ), (n+k* γ) mod Nf is the subframe numbers of these UL subframes, and ((n+k* γ)/Nf) is the frame number of these subframe place frames to nf+floor.
Be example with option0, choose UL subframe subframe 0 as the subframe that can be used for the UL repeated link at frame nf, Zhi Hou UL subframe 8 (@frame nf then), UL subframe 6 (@framenf+1), UL subframe 4 (@frame nf+2), UL subframe 2 (@frame nf+3) all can be used for the UL repeated link.For UL subframe 8 (@frame nf), need be at DL subframe 4 (@frame nf) send UL grant, at DL subframe 2 (@frame nf+1) send PHICH (feeding back ACK/NACK).In like manner for UL subframe 6 (@frame nf+1), need DLsubframe 2 (@frame nf+1) and DL subframe 0 (@frame nf+2) cooperation.The rest may be inferred has just obtained the subframe that those shown in the option 0 among Fig. 3 can be used for the UL/DL repeated link.
As shown in Figure 3, the corresponding a kind of option of every kind of value of n, the subframe that is used for the UL/DL repeated link among every kind of option has certain periodicity, namely in frame nf among selected UL/DL repeated link subframe and the frame nf+p selected UL/DL repeated link subframe identical, p=floor ((n+ λ)/Nf) wherein, λ is the least common multiple of γ and Nf, LTE FDD, p=4.Namely as shown in Figure 3, each frame is that unit carries out repetition with 4, is repetition as frame nf and the selected repeated link subframe of frame nf+4.
Be that unit period is carried out the repeated link subframe when selecting at the integral multiple with frame or frame, if the selected repeated link subframe of option x and the selected repeated link subframe of option y are identical, then claim option x and option y equivalence.The wherein corresponding option of n=0 and n=8 (option) equivalence; The corresponding option equivalence of n=1 and n=9, thus have 8 kinds of independently options, i.e. option0 shown in Figure 3, option1 ..., option7, and these 8 kinds of options have traveled through all subframe in this unit.
For every kind of option, the UL direction, per 2 continuous subframes that are used for the UL repeated link be spaced apart 8, satisfy the re-transmission period 8 of UL HARQ; The DL direction satisfies the corresponding HARQ sequential of subframe (PHICH and UL grant) that is used for the UL repeated link.Then UE _ RN ↔ RN Between communication can carry out in all remaining subframes, and still can communicate according to the temporal constraint of original LTE HARQ, thereby guaranteed backward compatibility.
In option 0, for UE_RN, if at UL subframe 6 (@frame nf) communicate with RN, then at UL subframe 4 (@frame nf+1), UL subframe 2 (@frame nf+2), UL subframe 0 (@frame nf+3) retransmit, its retransmit interval is 8.And need DLsubframe 2 (@frame nf), DL subframe 0 (@frame nf+1), DL subframe 8 (@framenf+2), DL subframe 6 (@frame nf+3) cooperation.And these subframes all are not used as repeated link, so UE _ RN ↔ RN Between communication be not affected, guaranteed backward compatibility.
Introduce the special processing to indivedual descending sub frames below.
At DL subframe{0, on 4,5, the 9}, there is RN → UE_RN, necessity operation of eNB → UE_eNB, as P/S-SCH, P/D-BCH, Paging.If the DL repeated link also will use these subframes, then need to do some special processings.
In the embodiment of the invention, RN or communicate by letter with eNB, or communicate by letter with UE_RN, but can not communicate with eNB and UE_RN simultaneously, at any one time namely, repeated link eNB ↔ RN With access link RN ↔ UE _ RN Can not exist simultaneously.
Introduce first kind of special treatment method to indivedual descending sub frames of the embodiment of the invention below.
Table 1
Figure G2009101374523D00094
As shown in table 1, UL subframe{n-4, n+4}, DL subframe{n, n+8} select according to the system of selection of repeated link subframe shown in Figure 3, are used for the relay sub-frame of UL/DL repeated link; And on DL subframe n, there is necessity operation of LTE system restriction in RN → UE_RN link, then first kind of processing method be RN → UE_RN link except carrying out these necessary operations, can also normally send the PDSCH channel, and corresponding PDCCH, configuration informations such as PCFICH.First kind of processing method M1 is divided into two kinds of situations:
Situation 1 on the DL subframe n, contains the data of issuing UE_RN in the PDSCH channel of RN → UE_RN link, and then UE need send UL ACK/NACK at UL subframe n+4, and this moment, this UL subframe n+4 can not be applied to repeated link;
Situation 2 on the DL subframe n, does not contain the data that send to UE_RN in the PDSCH channel of RN → UE_RN link, and then UE_RN need not send UL ACK/NACK at UL subframe n+4, and this moment, this UL subframe n+4 can be applicable to repeated link.Therefore, situation 2 has guaranteed the availability of the repeated link of UL subframen+4.
In addition, for access link RN ↔ UE _ RN , Because the access link of UL subframe n-4 forbidding, then RN does not need to send PHICH on the access link of DL subframe n.And RN does not send UL grant on the access link of DL subframen, make UE_RN on UL subframe n+4, not send data (PUSCH), namely on the access link of DL subframe n+8, do not need RN to send PHICH, thereby guarantee the availability of the repeated link of DL subframe n+8; If descending sub frame DL subframe n+8 is configured to MB SFN (Multicast Broadcast Single Frequency Network, Multicast Broadcast Single Frequency Network) during subframe, just can allow to send the UL data at up subframe n+4, its corresponding ACK/NACK feedback is carried out at DL subframe n+8, the UL scheduling is given UL grant and is carried out at DLsubframe n, and this moment, the non-unicast service of MBSFN subframe subframe n+8 partly can be used for repeated link, still guaranteed the availability of repeated link on this subframe.
As shown in Table 1, in the situation 1 of first kind of processing method, available repeated link is UL subframen-4 and DL subframe n+8; Available repeated link is UL subframe{n-4 in the situation 2, n+4} and DL subframe n+8.As seen, for repeated link eNB ↔ RN , Do not meet the HARQ sequential of LTE FDD, but can carry out design flexible to the HARQ sequential according to the characteristics of repeated link, namely according to available repeated link subframe, the feedback sequential of redesign UL/DL HARQ, and sequential relationships such as UL scheduling and UL retransmit interval.Be similar to the sequential of LTE TDD HARQ as employing, as shown in table 2, table 2 is depicted as cycle frame[nf, nf+p) a kind of sequential of Nei HARQ, and other periodic group is seemingly.
Table 2
Figure G2009101374523D00111
In the table 2, for first kind of processing method situation 1, the PHICH that DL subframe n+8 sends on repeated link is the ACK/NACK feedback of RN on the UL subframe n-4 being issued the PUSCH of eNB.And UL subframe n-4 apart from the time interval that next UL retransmits be 16, other all be 8, as seen the UL re-transmission period here has certain variation, therefore UL retransmits and uses asynchronous mode in the embodiment of the invention, be that eNB needs at each cycle frame[nf, nf+p) DL subframe n+8 sends, and informs to retransmit the position at UL subframe n+12, and each retransmit interval afterwards all is defaulted as 8.
In the table 2, for first kind of processing method situation 2, the PHICH that DL subframe n+8 sends on repeated link, comprised the subframe{n-4 to UL, the ACK/NACK feedback of the data on two subframes of n+4}, the UL grant that on repeated link, sends of DL subframe n+8 in like manner, comprised ULsubframe{n-4, the schedule information of two subframes of n+4}, remaining subframe is all also undertaken by the HARQ sequential of LTE FDD, namely in first kind of processing method situation 2, need dispatch and the PHICH feedback information at the UL grant that some downlink relay link subframes send a plurality of UL repeated link subframes.And the existing 8ms of UL re-transmission period also has 16ms, need to use the asynchronous system notice, or the mode of storing this information is in advance known.
First kind of processing method can be used for the processing of all DL subframe, below with DLsubframe{0,4,5,9} is that example describes.Specifically as shown in table 3:
Table 3
Figure G2009101374523D00121
Introduce second kind of special treatment method to indivedual descending sub frames of the embodiment of the invention below.
Different with first kind of processing method is, second kind of processing method requires on DL subframe 0, RN → UE_RN link is except operations necessary, do not do other any operation, namely do not send PDSCH and relevant PDCCH, configuration informations such as PCFICH, so it is second kind of processing method only can be applicable to DLsubframe0, specifically as shown in table 4.
Table 4
Figure G2009101374523D00132
As shown in Table 4, second kind of processing method cut apart DL subframe 0, several OFDM of front (Orthogonal Frequency Division Multiplexing, OFDM) symbols sends PCFICH for repeated link eNB → RN, PHICH, UL grant and pilot tone, this moment, RN was in accepting state; The symbols of back is used for access link RN → UE_RN and carries out necessary operation, sends P/S-SCH, P-BCH and pilot tone, and this moment, RN was in the transmission state, and namely DL subframe 0 part is used for repeated link, and part is used for access link.And the embodiment of the invention constrains on this DL subframe, and repeated link eNB → RN does not send data and relevant configuration information thereof, thereby has avoided RN to receive and dispatch simultaneously.And then according to LTE FDD constraint (4), on repeated link RN → eNB of UL subframe 4, do not need to send UL ACK/NACK.
As shown in Table 4, UL Subframe 6@ frame nf-1, UL subframe 4@ frame nf, DLsubframe 0@ frame nf, DL subframe 8@ frame nf all can be used for repeated link, second kind of processing method guaranteed that repeated link satisfies the sequential of LTE FDD HARQ, i.e. the sequential relationship of the UL ACK/NACK of the UL grant of UL re-transmission period, UL data and PHICH feedback and DL data.After introducing relay, very little to the change of original system like this, also reduced the complexity that repeated link designs simultaneously.
In conjunction with the constraint (6) of LTE FDD, the option among Fig. 3 has following characteristics:
One, option{0, each option among 2,4, the 6} does not contain DL subframe 9, and all contains DL subframe{0,4}, brief note option{0,2,4,6} is Group x;
Two, option{1, each option among 3,5, the 7} does not contain DL subframe 4, and all contains DL subframe{5,9}, brief note option{1,3,5,7} is Group y.
6 constraints of comprehensive above characteristics and LTE FDD, for Ns=1, Paging message will send at DLsubframe 9, and the repeated link subframe can be selected those option that do not contain DL subframe 9 or its combination; Or those use option or its combination after first kind of disposal methods to DL subframe 9; Option after perhaps selecting these to handle and the combination that does not contain the option of DL subframe 9.For Ns=2 or 4, Paging message need be at DL subframe{4,9}, or DL subframe{0,4,5,9} sends, but each option or comprise DL subframe 4 among Fig. 3, comprise DLsubframe 9, therefore need to use first kind of processing method respectively to DL subframe{4,9} handles, and then repeated link just can be selected the combination of these option after treatment.Provide the system of selection of embodiment of the invention repeated link subframe below, as shown in table 5.
Table 5
Ns The selection of repeated link subframe
1 Any one option among the Group x or its combination; Perhaps select any one option or its combination among the Group y after first kind of disposal methods of DL subframe 9 uses; Perhaps DL subframe 9 is used the combination of the option among the option and Group x among the Group y after first kind of disposal methods
2 or 4 To option or its combination among the Group y after first kind of disposal methods of DL subframe 9 uses; Or to option or its combination among the Group x after first kind of disposal methods of DL subframe 4 uses; Or the combination of option between these two Group after handling
Shown in Fig. 4 a, in LTE, the MBSFN subframe is the DL subframe, and 1～2 the OFDM symbol in its front is used for clean culture (Unicast) business, the PCFICH that transmits control channel, PHICH and/or UL Grant, pilot tone.
When underway stepchild's frame is selected, the DL repeated link also can be arranged in the MBSFN subframe, DL repeated link eNB → RN uses the part that non-unicast service uses in the MBSFN subframe to transmit at this moment, be that each subframe that can be configured to MBSFN all can be selected as DL repeated link subframe, in LTE/LTE-A FDD, except DL subframe { subframe n|n=0,4, other DL subframes outside 5, the 9} all can be configured to the MBSFN subframe, and can be used for DL repeated link subframe potentially.
In specific embodiments of the invention, integral multiple with frame is the cycle, choose the corresponding subframe of combination of elementary cell or elementary cell as the repeated link subframe, wherein, the feature of elementary cell is, be one group of sub-frame of uplink and descending sub frame in the unit period at the integral multiple of frame, these subframes satisfy specific HARQ sequential; And/or these subframes satisfy following relation: be spaced apart UL HARQ retransmit interval between the UL subframe, interval between the DL subframe equals the interval between the UL subframe, the subframe numbers of sub-frame of uplink=(subframe numbers+side-play amount k of descending sub frame) mod M, described M is all descending/sub-frame of uplink numbers in the described integral multiple frame period, wherein side-play amount k is natural number, generally determined by employed HARQ sequential on these subframes, be specially the ACK/NACK feedback interval of the DL process on this DL subframe, perhaps k is certain offset value of system restriction, as k=4.
The corresponding elementary cell of every kind of option as shown in Figure 3, with the definition of the elementary cell among Fig. 3 first kind elementary cell, brief note is Alt1, the feature of Alt1 is, integral multiple with frame, for example 4 times is one group of sub-frame of uplink and the descending sub frame in the unit period, these UL subframes and DL subframe satisfy first kind of HARQ sequential, the ACK/NACK feedback interval that is the process on the DL subframe is 4ms, the 4ms that is spaced apart between the transmission of (UL grant) and UL process is given in the scheduling of UL process, the ACK/NACK feedback interval of the process on the UL subframe is 4ms, and the re-transmission period of UL process is 8ms.For example, shown in Fig. 4 b, example for an elementary cell among the Alt1, the corresponding UL/DL subframe of grey colored pattern is that the integral multiple (4 times) with frame is one group of sub-frame of uplink and the descending sub frame in the unit among the figure, and satisfies first kind of above-mentioned HARQ temporal aspect, and the DL sub-frame interval is 8ms, the UL subframe be spaced apart 8ms, UL subframe numbers=(DL subframe numbers+4) mod 40, wherein in the integral multiple (4 times) of frame, on/scope of descending sub frame number is 0～39.
Similarly, define the second class elementary cell and be designated as Alt2, their features are: be one group of sub-frame of uplink and the descending sub frame of chronomere with the integral multiple (4 times) of frame, these sub-frame of uplink and descending sub frame satisfy second kind of HARQ sequential, the ACK/NACK feedback interval that is the process on the DL subframe is 4ms, the scheduling of UL process give and the transmission of UL process between be spaced apart 4ms, the ACK/NACK feedback interval of the process on the UL subframe is 6ms, the re-transmission period of UL process is 10ms.For example, shown in Fig. 4 c, for being an elementary cell example among the Alt2, the corresponding UL/DL subframe of grey colored pattern is that the integral multiple (4 times) with frame is one group of sub-frame of uplink and the descending sub frame in the unit among Fig. 4 c, satisfy second kind of above-mentioned HARQ temporal aspect, and the DL sub-frame interval is 10ms, the UL subframe be spaced apart 10ms, UL subframe numbers=(DL subframe numbers+4) mod 40.
Similarly, define the 3rd class elementary cell and be designated as Alt3, its feature is: be one group of sub-frame of uplink and the descending sub frame of chronomere with the integral multiple (4 times) of frame, these UL/DL subframes satisfy the third HARQ sequential, the ACK/NACK feedback interval that is the process on the DL subframe is 4ms, the scheduling of UL process give and the transmission of UL process between be spaced apart 4ms, the ACK/NACK feedback interval of the process on the UL subframe is 12ms or 4ms, and the retransmit interval of UL process is the integral multiple of 8ms or 8ms.For example, shown in Fig. 4 d, it is an elementary cell example among the Alt3, be that the subframe numbers of the up/descending sub frame in the unit is 0～39 with the integral multiple (4 times) of frame, the corresponding UL/DL subframe of grey colored pattern is that the integral multiple (4 times) with frame is one group of sub-frame of uplink { 1 in the unit among Fig. 4 d, 17,25} and descending sub frame { 13,21,37}, they satisfy the third above-mentioned HARQ temporal aspect, namely at frame[n, n+3] time on, DL subframe { 13, the ACK/NACK feedback interval of the process on 21, the 37} is 4ms; The scheduling of UL process give and corresponding UL process transmission between the interval be 4ms; The UL subframe ACK/NACK feedback interval of the process on 1,17, the 25} is followed successively by 12ms, and 4ms, 12ms, { re-transmission period of the process on 1,17, the 25} is followed successively by 16ms to the UL subframe, 8ms, 16ms.The DL sub-frame interval is the integral multiple of 8ms, the integral multiple that is spaced apart 8ms of UL subframe, UL subframe numbers=(DL subframe numbers+4) mod 40.
The 3rd class elementary cell is the DL subframe subframe n in the first kind elementary cell, and UL subframe subframe n+4, n=0, and 4,5,9, UL and DL subframe after the deletion are combined to form the 3rd class elementary cell.This processing method is identical with the situation 1 of aforementioned first kind of processing method, all is with the DL subframe subframe n in the elementary cell, and UL subframe subframe n+4, n=0, and 4,5,9, be not used in repeated link.
As shown in table 6, be the explanation of above-mentioned three kinds of HARQ sequential.
Table 6
Three kinds of HARQ sequential PDSCH VS.UL ACK/NACK； PHICH/UL grant VS.PUSCH (ms) PUSCH VS. PHICH(ms) UL retransmission period(ms)
Alt 1 4 4 8
Alt 2 4 6 10
Alt 3 4 4，12 8，16
Integral multiple (4 times) at frame is in the unit, has 8 first kind elementary cells of quadrature each other, i.e. Alt1 option i, i=0,1,2 ..7; Have 10 second class elementary cells of quadrature each other, i.e. Alt2 option i, i=0,1,2 ..9; Have 8 the 3rd class elementary cells of quadrature each other, i.e. Alt3 option i, i=0,1,2 ..7.Specifically as shown in table 7:
Table 7
Figure G2009101374523D00171
In the table 7, nf represents frame number, and the numeral in the row of " option " correspondence is the numbering to elementary cell option, each corresponding elementary cell, the numeral subframe numbers in the row except " option ".According to table 7, each elementary cell of Alt1 comprises 5 DL subframes and 5 UL subframes; Each elementary cell of Alt2 comprises 4 DL subframes and 4 UL subframes; Each elementary cell of Alt3 comprises 3 DL subframes and 3 UL subframes.And the interval in each elementary cell between the UL subframe equals the re-transmission period of UL process, and the interval between the DL subframe also equals the interval between the UL subframe.And the integral multiple (4 times) at frame is in the chronomere, all elementary cells of Alt3 and Alt2 option{3,4,8,9} is supplementary set each other, i.e. all elementary cells of Alt3 and Alt2 elementary cell option{3,4, the integral multiple (4 times) that the corresponding subframe of 8,9} is formed frame jointly is all UL and DL subframe in the chronomere.The another one characteristics are option m among the Alt3, m=0,2,4,6 is one group of elementary cell of ring shift right each other, and the subframe that namely any one elementary cell wherein can be comprised is ring shift right integral multiple frame simultaneously, be the integral multiple of 10ms, obtain other three elementary cells; In like manner, optionm among the Alt3, m=1,3,5,7 also is one group of elementary cell of ring shift right each other, can carry out ring shift right by any one elementary cell wherein and obtain other three elementary cells.At this moment, system only need preserve two elementary cells just can obtain all elementary cells among the Alt3, thereby saves memory space.For example can obtain Alt3 option m, m=3,5,7 by Alt 3 option 0 being carried out ring shift right; Can obtain Alt3 option m by Alt 3 option 1 being carried out ring shift right, m=3,5,7, so system only needs to preserve option0 and option1 among the Alt 3, just can obtain all option among the Alt3.These two elementary cells for the needs storage, as opotion 0, option 1, can further simplify their storage, namely only preserve the subframe numbers of the DL subframe in these two elementary cells, sub-frame of uplink obtains by sub-frame of uplink number=(descending sub frame number+side-play amount (OFFSET)) mod40, as only preserving the DL subframe numbers k=12 among the option0,28,36, (the DL/UL subframe numbers is 0 in the chronomere of four frames, 1,2 ... 39), the sub-frame of uplink that corresponds in this elementary cell of (k+4) mod 40 then; Option 1 also is in like manner.
The subframe numbers of the subframe that comprises in each elementary cell in the table 7 or be even number, it all is odd number, so according to these odd even characteristics, all be that the elementary cell of even number is classified as Group A with the subframe numbers of contained subframe, all be that the elementary cell of odd number is classified as Group B with the subframe numbers of contained subframe, and with Alt i, i=1, the elementary cell subclass that belongs to GroupA in 2,3 is called " Alt i idol "; With Alt i, i=1, the elementary cell subclass that belongs to GroupB in 2,3 is called " Alt i is strange ".Option{0 among the Alt2 for example, 2,4,6,8} are called " Alt2 idol "; Option{1 among the Alt2,3,5,7,9} are called " Alt2 is strange ".
Each corresponding a kind of HARQ sequential of above-mentioned three class elementary cell Alt1, Alt2 and Alt3.There is the coincidence of subframe when two elementary cells, namely there are common UL subframe or DL subframe, and the subframe numbers of this subframe in these two elementary cells is all identical with frame number, then between these two elementary cells the HARQ timing conflict can take place, and the UL/DL HARQ process in these two elementary cells can the generation process be collided on this UL/DL subframe also; Namely according to the HARQ sequential of an elementary cell, need communicate at certain UL or DL subframe, and communicate at this UL or DL subframe according to the HARQ sequential of another elementary cell also needs, will clash this moment.
If one in two elementary cells that meeting is clashed is used for access link, another is used for repeated link, the HARQ timing conflict of repeated link and access link will take place, and this conflict can be by following several solutions: one, by distributing those elementary cells that can not bump to avoid conflict for respectively repeated link and access link; Two, change the HARQ sequential, the HARQ sequential of the process that i.e. adjustment can bump, as adjusting the ACK/NAK feedback interval of UL/DL process, or the UL process be dispatched to interval between the UL process transmission, UL re-transmission period etc. avoid conflict by adjusting the HARQ sequential; Three, select repeated link and an access link link wherein to transmit, abandon the transmission on another link, on the subframe that bumps, the HARQ process on the link of not abandoned can incur loss so.
If two elementary cells that meeting is clashed are used for two different UE, then base station or relay station can be by distinguishing the HARQ process that UE distinguishes these two collisions.If these two elementary cells are used for two different processes of same UE, then can clash, the solution of this conflict can allow base station or relay station distinguish this two processes by process number; Or the corresponding subframe of elementary cell and HARQ sequential thereof that scheduling can not be collided each other avoid conflict for the different processes of same UE.
In the table 7, the elementary cell that can clash is:
Option m among the Alt1, m ∈ { the option n among 0,2,4,6} and the Alt2, n ∈ { 0,2,4,6};
Option m among the Alt1, m ∈ { the option n among 1,3,5,7} and the Alt2, n ∈ { 1,3,5,7};
Option m among the Alt3, m ∈ { the option n among 0,2,4,6} and the Alt2, n ∈ { 0,2,6};
Option m among the Alt3, m ∈ { the option n among 1,3,5,7} and the Alt2, n ∈ { 1,5,7};
Option m among the Alt3 and the option n among the Alt1, and m=n; M, n ∈ { 0,1,2,3,4,5,6,7}.
Along with the evolution of network, the phenomenon of UE (R8/9/10-UE) coexistence under the multiple version such as R8/9/10 will appear in the network, and base station or relay station will provide service for R8/9/10-UE in those subframes that satisfies backwards compatibility fully; And providing service in those subframes that not exclusively satisfy backwards compatibility for R10-UE, this moment, some variations may take place than the HARQ sequential among the R8/9 in the UL/DL HARQ sequential of R10-UE.
In sum, be not that the subframe that comprises of the combination of all elementary cells in the table 7 or elementary cell all can be used for repeated link, in embodiments of the present invention, need take all factors into consideration following factor during the choosing of the underway link subframe that continues:
1) assurance is to the backward compatibility of Rel-8/9UE;
2) Rel-10UE, Rel-10RN, the change of the relative Rel-8 of Rel-10eNB minimizes;
3) the HARQ process of repeated link can not clash with the HARQ process of access link, namely can there be certain UL/DL repeated link subframe, HARQ sequential needs according to repeated link carry out relay transmission in this subframe, transmit in this subframe according to the HARQ sequential of access link also needs simultaneously;
4) DL repeated link subframe does not comprise the DL subframe that can not be configured to the MBSFN subframe, and DL repeated link subframe does not comprise DL subframe{0,4,5,9} in LTEFDD;
5) relay sub-frame as far as possible evenly distributes in each frame, is conducive to postpone control and simple;
6) Backhaul (backhaul) link need have enough resources to guarantee mating (containing a plurality of RN) with the capacity of access link;
7) backhaul resource branch is equipped with and supports different RN quantity and different application scenarioss as far as possible flexibly, channel condition etc., and repeated link can be shared the resource of this subframe with UE_eNB in same subframe;
8) can guarantee support to the MBSFN business simultaneously.
According to above consideration, the option{0 in the table 7 among the Alt2,2,6, elementary cell among 1,5,7} and the Alt3 does not comprise the subframe that can not be configured to MBSFN in the LTE/LTE-A FDD system, namely do not comprise DL subframe { 0,4,5,9}, so the subframe that these elementary cells comprise can be used to repeated link, and repeated link corresponding HARQ sequential of elementary cell under each subframe of these elementary cells is used this subframe.Consider simultaneously, avoid conflicting of above-mentioned repeated link and the employed elementary cell of access link, then can only distribute elementary cell that those and elementary cell that repeated link uses can not clash or the combination of elementary cell to use to UE.Shown in the table 8 specific as follows:
Table 8
Figure G2009101374523D00221
In the table 8, " Alt 2 ' idol " refers to Alt2 option{0,2,6}; " Alt 2 ' is strange " refers to Alt2 option{1,5,7}; " supplementary set " refers to the set with the complementary elementary cell of the selected elementary cell of repeated link [option m], and for example " Alt3 supplementary set " refers among the Alt3 set with the complementary elementary cell of the selected elementary cell of repeated link [option m]; " Alt2 idol supplementary set " refers in " Alt2 idol " set with the complementary elementary cell of the selected elementary cell of repeated link [option m].
Because it is a plurality of that the elementary cell of same type has, so the different elementary cells of same number can form the various combination under the same ratio.If nf is in the chronomere of the integral multiple of the residing frame of elementary cell (4 times), the number of all UL/DL subframes; The elementary cell that is used for repeated link is [option m] ∈ { Alt2 option{0,2,6,1,5,7}, Alt3}, m=1,2 ... N, 1≤N≤8, and the number of [the option m] of elementary cell UL/DL subframe of comprising is Km, { 3,4}, then repeated link UL/DL number of subframes is Km ∈
Figure G2009101374523D00222
And max { Σ m = 1 N K m } = 24 , Repeated link UL/DL number of subframes with the ratio of access link UL/DL number of subframes is ( Σ m = 1 N K m ) : ( Nf - Σ m = 1 N K m ) .
The relation that repeated link shown in the table 8 and access link do not bump can be specific as follows:
Table 9
Figure G2009101374523D00225
Figure G2009101374523D00231
As shown in table 9, several configuration modes of repeated link subframe have been provided, namely in the chronomere of the integral multiple of frame, dispose which subframe for the transmission of repeated link, and be given in simultaneously under the various configuration modes, can be used for the subframe that satisfies LTE R8 HARQ sequential of access link, and satisfy the subframe of Alt2/Alt3HARQ sequential.Wherein, use subframe must satisfy LTE R8 HARQ sequential, i.e. subframe in the Alt1 elementary cell to R8/9-UE; The subframe of using to R10-UE can be Alt1, or Alt2, or the subframe in the Alt3 elementary cell, but consider the complexity that R10-UE can bear, can priority allocation those do not clash with repeated link, and the subframe that belongs to the elementary cell of Alt2 or Alt1 is given R10-UE.If system allows the spendable HARQ sequential of UE greater than a kind of, so when giving the UE scheduling resource, should clearly tell the employed HARQ sequential of process of this UE; Otherwise, if system only allows UE to use a kind of definite HARQ sequential, then need not to inform.The table 9 specifically HARQ sequential on every link is as shown in table 10:
Table 10
Figure G2009101374523D00241
According to table 10 as seen, the corresponding HARQ sequential of Alt2 and Alt3 is two kinds of HARQ sequential that can be used for repeated link, and along with the difference of configuration mode, repeated link can only use a kind of sequential wherein, or uses this two kinds of sequential simultaneously.
In the table 9 under the configuration mode of different repeated link subframes, repeated link is also different, specifically as shown in table 11 with maximum HARQ process on the access link:
Table 11
Figure G2009101374523D00251
As shown in table 11, configuration mode for different repeated link subframes, the position of subframe that can be used for UE is different with number, and the number of subframes that can be used for R8/9-UE is also different with the ratio of the number of subframes that can be used for R10-UE, be under the configuration mode of different repeated link subframe, the maximum HARQ process number of repeated link, and supported R8/9-UE is also different with the number ratio of R10-UE, and supported R8/9-UE is also different with the maximum HARQ process number of R10-UE.System can come the choose reasonable configuration mode according to actual conditions.
Base station and relay station can be according to actual conditions, as residing application scenarios, and as the city, suburb etc.; Load separately, type of service and service quality (Quality of Service, QoS); The resource situation that the base station has, as resource size, continuously/and discontinuous frequency spectrum, state of carrier aggregation (carrier aggregation); The position of the relay station that lays under the base station and number; The number ratio of R8/9-UE and R10-UE; And actual wireless communication environments feature, determine required repeated link resource, thereby select the configuration of suitable repeated link subframe, comprise number and position, HARQ sequential etc. realize that the repeated link resource is distributed flexibly, make the coupling of repeated link and access link capacity, making the base station when relay transmission is provided, also can directly be user's service as much as possible, improves the capacity of network.In the network, there is difference in the actual conditions of each base station, so each residential quarter selects the configuration possibility of employed repeated link subframe different.
The configuration mode of repeated link subframe has multiple, and the configuration mode of the employed repeated link subframe of real system can be the whole of table 9, also can be the subclass of selecting from table 9.Simultaneity factor also can be classified to the configuration mode of repeated link subframe.A kind of mode classification as shown in table 9, corresponding all elementary cells of index#0 all belong to the situation of Alt2, the corresponding even number elementary cell of index#1 belongs to Alt2, the odd number elementary cell belongs to the situation of Alt3, the corresponding odd number elementary cell of index#2 belongs to Alt2, the even number elementary cell belongs to the situation of Alt3, and corresponding all elementary cells of index#3 all belong to the situation of Alt3.In fact, can carry out diversified classification to the configuration mode of repeated link subframe, the sorting technique of the index shown in the table 9 is wherein a kind of just.
Before the underway transmission that continues, relay station and/or adjacent area need be informed with relevant repeated link configuration information by system, and these configuration informations comprise:
1. the term of validity of repeated link configuration, and/or effective marker position, namely the base station is according to system loading, the trunk channel condition, the relay application scenarios, UE QoS etc., inform the repeated link configuration information the time, need inform this configuration information validity in time, be effectively as this configuration information in the integral multiple of frame, as 1 frame, 4 frame, 32 frame, 256 frame etc.; Also can be provided with the valid flag position simultaneously, whether effective to show present configuration information, as put 1 expression effectively, it is invalid to put 0 expression, if find that present configuration information with invalid, then needs to receive new configuration information.Another kind of mode is, periodically indication, the changes in demand situation of determining to depend on the repeated link subframe of periodic quantity, and above-mentioned similar factor, generally speaking, for fixing relay, can use the long cycle to indicate, to use relatively short cycle indication comparatively speaking for mobile relay.
2. the configuration of repeated link subframe, namely concrete which subframe is used for the transmission of repeated link.
Wherein, the configuration information of repeated link subframe can have following several indicating mode:
One, be that the bitmap in cycle directly indicates the repeated link subframe with the integral multiple of frame, namely be used for repeated link with which subframe in the cycle of the integral multiple of bitmap indication frame, configuration in each cycle is identical, wherein one of correspondence may be for the descending sub frame of repeated link respectively for each bit, just the corresponding bit of this subframe is put 1 if this subframe is used for repeated link, otherwise put 0.The bit number of bitmap equal integral multiple with frame be in the unit might be used for the number of the descending sub frame of repeated link.And establish DL subframe subframe n for downlink relay link, then the corresponding UL subframe of this subframe subframe j also is used for the UL repeated link, the subframe numbers j=of sub-frame of uplink (subframe numbers+side-play amount k that is used for the descending sub frame of repeated link) mod M, described M is all descending/sub-frame of uplink numbers in the described integral multiple frame period, wherein side-play amount k is natural number, generally determined by employed HARQ sequential on the repeated link, be specially the ACK/NACK feedback interval of the DL process on this DL subframe subframe n, perhaps k is certain offset value of system restriction, as k=4.In three class elementary cells in the embodiment of the invention, k=4.
Two, the mode of elementary cell bitmap, be used for repeated link with concrete which elementary cell of using of bitmap indication, wherein one of correspondence may be for the elementary cell of repeated link respectively for each bit, just the corresponding bit of this elementary cell is put 1 if this elementary cell is used for repeated link, otherwise put 0.The bit number of bitmap equals to be used for the number of the elementary cell of repeated link.Subframe in elementary cell or the elementary cell combination is configured to the repeated link subframe.
Three. the mode of the bitmap of descending sub frame group, be which descending sub frame group in the cycle is used for repeated link at the integral multiple of frame specifically with bitmap indication, the corresponding descending sub frame group that may be used for repeated link of each bit, wherein the descending sub frame group is made up of one group of descending sub frame with specific sub-frame interval, and described sub-frame interval is the retransmit interval of repeated link UL HARQ.And then obtain sub-frame of uplink for repeated link according to following relation, the subframe numbers of sub-frame of uplink=(subframe numbers+side-play amount k that is used for the descending sub frame of repeated link) mod M, described M is all descending/sub-frame of uplink numbers in the described integral multiple frame period, the side-play amount definite and in above-mentioned first kind of indicating means of described side-play amount is the same, repeats no more here.The bit number of Bitmap may be used for the number of the descending sub frame group of repeated link
Four. the mode of the bitmap of initial subframe, if M is all descending/sub-frame of uplink numbers in the integral multiple frame period, subframe numbers i=(a+k*L) modM that then is used for the descending sub frame of repeated link, and imodN ≠ 0,4,5,9, be used for subframe numbers j=(i+b) modM of the sub-frame of uplink of repeated link, wherein N is the descending sub frame number in each frame, as N=10; L is UL HARQ re-transmission period, the aliquot M of L, and as L={8, or 10}; A is initial subframe numbers in the UL HARQ re-transmission period, as a={0, and 1,2 ..., L-1}; B is the side-play amount between sub-frame of uplink number and the descending sub frame number, as b=4.When system uses the mode of Bitmap to indicate, use the value of the corresponding a of a bit, bit puts 1, and expression a can get corresponding value, and bit puts 0, and expression a cannot go corresponding value.Obtain several values of a according to Bitmap, at each value of resulting a, can obtain one group of descending sub frame and sub-frame of uplink respectively according to above-mentioned formula then, and these subframes are used for the repeated link transmission.
Five, directly indicate the configuration mode of repeated link subframe, all configuration modes that are about to the actual employed repeated link subframe of system are numbered, and directly which kind of configuration mode indication uses then, and the required bit number of this indicating mode is
Figure G2009101374523D00281
Wherein P is the number of the configuration mode of all possible repeated link subframe.
Six, any one in above-mentioned five kinds of indicating modes or multiple compound mode.
The configuration information of above-mentioned repeated link link can inform or by high-rise (highlayer) configuration, also can inform when the initialization of relay station by system message, or relay station is linked in the process of base station and informs.Relay station just can use for the UE that serves according to the selection of rule shown in the above-mentioned table 9 suitable subframe and HARQ sequential then.
For supporting multicast MBMS business, the base station can preferentially dispose the employed MBSFN subframe of those non-repeated links and be used for this business.If the configuration difference of the repeated link subframe of each base station/relay station, need carry out negotiation between base station/relay station this moment by network side, and the MBSFN subframe that disposes the common non-repeated link link subframe of each base station/relay station is used for being used for the MBMS business in the same multicast service district.If there is not the common subframe that can be used for the MBMS business in each base station/relay station in same multicast service district, then can be by suitably adjusting the scope in this multicast service district, and/or adjust the repeated link sub-frame configuration of some base station/relay station, make the such subframe that can be used for the MBMS business jointly of appearance in this district.
In addition, if the MBSFN subframe some be used for repeated link, some is used for multicast MBMS business, then needs concrete above-mentioned which kind of communication of informing that UE carries out in this subframe.
Can reserve guard time (GAP) according to the needs of reiving/transmitting state change-over time of synchronous error/propagation delay time and relay for selected repeated link subframe.This guard time is positioned at relay sub-frame, and relay does not does not receive and dispatch data in guard time, can be for changing between idle (IDLE) and/or the reiving/transmitting state.The length of guard time can be got the K in LTE sampling interval doubly, and wherein K is integer, and for example K is the approximate number that Fourier transform is counted, specifically as shown in Figure 5.Ctrl among Fig. 5 is illustrated on RN → UE_RN link and sends PFICH, PHICH, UL grant or pilot tone etc.
As shown in Figure 5, on selected DL subframe n, if DL subframe n-1 is used for access link RN → UE_RN, then need reserve guard time in the stem of DL subframe n; If DLsubframe n+1 is used for access link RN → UE_RN, then need reserve guard time at the afterbody of DL subframe n.Communication according to whether existing at DL subframe n on access link RN → UE_RN is divided into two types (Type) with DL subframe n:
There is not the communication on access link RN → UE_RN in Type1 on the DL subframe n, only need respectively reserve guard time at the head and the tail of this subframe this moment and just can;
There is communication on access link RN → UE_RN in Type2 at selected DL repeated link subframe DL subframe n, as PCFICH, and PHICH, information such as UL grant or pilot tone then only need to reserve guard time by mode as shown in Figure 5 and get final product.Ctrl among Fig. 5 comprises a kind of or whole of this several Control information.
When DL repeated link subframe was positioned at the MBSFN subframe, then the guard time of Yu Liuing can not utilize the clean culture OFDM symbol time of MBSFN subframe front, also can partly utilize or all utilize the clean culture OFDM symbol time of MBSFN subframe front.Describe at Type1 and Type2 below, specifically as shown in Figure 6.
Fig. 6 is Type1; part is protected time utilization MBSFN subframe clean culture OFDM symbol among Fig. 6; the guard time of repeated link subframe stem has used 1～2 OFDM symbol of the front of MBSFN subframe; and need additionally reserve guard time at the afterbody of subframe, be used for the conversion of relaying reiving/transmitting state and/or propagation delay time etc.
Figure 7 shows that Type1, namely during no unicast service, when eNB and the skew of RN subframe, the guard time total length that is positioned at the relay sub-frame initial and tail sections is the OFDM symbol lengths (1 OFDM symbol or 2 OFDM symbols) that eNB is used for unicast service to RN in relay sub-frame.For example in Fig. 7, the guard time of relay sub-frame front and the guard time of back respectively account for half of MBSFN subframe clean culture OFDM symbol.
Fig. 8 is Type2; 1～2 OFDM symbol of repeated link subframe front still is used for the unicast service on access link RN → UE_RN; ensuing guard time and all need additionally to reserve in the tail part protection time of subframe is used for the conversion of relaying reiving/transmitting state and/or propagation delay time etc.
Fig. 9 is Type2; it also is a kind of form that guard time does not utilize the clean culture OFDM symbol of MBSFN subframe; be that eNB and RN subframe are when existing as shown in Figure 9 skew; RN is at the OFDM symbol of the clean culture of this repeated link subframe front; it is 1～2 OFDM symbol of the front of MBSFN subframe; RN still is used for the unicast service on RN → UE_RN link, and ensuing guard time and all need additionally to reserve in the tail part protection time of subframe is used for the conversion of relaying reiving/transmitting state and/or propagation delay time etc.
Figure 10 a is depicted as Type2, namely in the RN relay sub-frame unicast service is arranged, and the guard time when eNB and the skew of RN subframe is followed the example of.The guard time length that is positioned at relay sub-frame among Figure 10 a is the integral multiple in LTE sampling interval, as being 1 OFDM symbol.
The guard time of corresponding UL relay sub-frame need satisfy for the K in sampling interval doubly, wherein K is integer, for example K is the approximate number that Fourier transform is counted.
For the selected DL repeated link subframe situation on the MBSFN subframe not, similar to the above, guard time is positioned at relay sub-frame.
In a specific embodiment of the present invention, based on Fig. 3, according to the characteristics of first kind and second kind processing method, use the DL subframe0 of each option among first kind of disposal methods Group x, and the DL subframe{5 of each option among the Group y, 9} obtains table 12.Use the DL subframe 0 of each option among second kind of disposal methods Group x, obtain table 13.Use the DL subframe{0 of each option among first kind of disposal methods Group x, 4}, and the DL subframe{5 of each option among the Group y, 9} obtains table 14.
Table 12
Figure G2009101374523D00311
Table 13
Figure G2009101374523D00312
Figure G2009101374523D00321
Table 14
The choosing method that can be used for the repeated link subframe according to table 5 as can be known in LTE FDD system is as follows:
Table 15
Ns The selection of repeated link subframe
1 Any one option in the table 12 or its combination; Or any one option or its combination in the Group x in the table 13
2 or 4 Any one option in the table 14 or its combination
According to aforesaid subframe selecting method, table 16 has specifically provided the selection of several repeated link subframes.
Table 16
Ns A kind of selection of LTE FDD system repeated link subframe
1 Option 0 in the table 12; Or the option 0+option 1 in the table 12; Or the option in the table 13 0;
2 or 4 Option 0+option 1 in the table 14
Below every kind of special treatment method of selecting and being correlated with is carried out labor respectively.Because the DL repeated link subframe subframe{0 in the table 12,5,9} has used first kind of processing method respectively.So the option 0 in the brief note table 12 is option0-M1, option 1 is option1-M1; In like manner, the option 0 in the brief note table 13 is option0-M2.
1、option0-M1
When as mentioned above, the option0-M1 scheme is applicable to Ns=1.And do not contain DLsubframe9 among the option 0, only need handle getting final product DL subframe 0, because first kind of processing method is divided into two kinds of situations, analyze at both of these case respectively below:
Table 17
Figure G2009101374523D00331
Figure G2009101374523D00341
Shown in table 17, at cycle frame[nf, nf+3) in, the subframe that is used for repeated link has ULsubframe{0,8,6,2} and DL subframe{4,2,8,6}.Remove these subframes, in this cycle remaining whole subframe all can be used for access link ( RN ↔ UE _ RN )&( eNB ↔ UE _ eNB ), and access link all satisfies the HARQ constraint of LTE FDD, and during for Ns=1, for any one UE, DL subframe 9 can be used to receive Paging message, at DL subframe{0,5} is used for receiving synchronously and broadcast message.Only UE_RN can not send the UL data on UL subframe 4@frame nf+2.
Simultaneously, the HARQ of repeated link is according to the principle of table 2, and concrete sequential is shown in table 18.
Table 18
Subframe 4UL:4DL DL 4 UL 8 DL 2 UL 6 DL 0 UL 4 DL 8 UL 2 DL 6 UL 0
state for relay link ○ ○ ○ ○ × × ○ ○ ○ ○
PDSCH VS. UL ACK/NACK 4 4 - - 4 4
PUSCH VS. UL grant G3 Process 3 G4 Process 4 - - G1 Process 1 G2 Process 2
PUSCH VS. PHICH P2 Process 3 P3 Process 4 - - P4 Process 1 P1 Process 2
UL retransmission interval 8 16 - 8 8
In like manner, use the method for first kind of processing method situation 2 to handle the DL subframe 0 among the option 0, specifically shown in table 19:
Table 19
Figure G2009101374523D00351
As shown in Table 19, the Opton0-M1 under the situation 2 has guaranteed that too UE_RN satisfies the sequential relationship of LTE FDDHARQ.And the HARQ on the repeated link also satisfies the principle of table 2.And situation also exists for 2 times, is that a plurality of UL subframe send UL grant and PHICH at a DL subframe, and is specifically as shown in table 2.
Other option and option0-M1 principle in the table 12 are similar, do not repeat them here.
2、option0-M1+option1-M1
The same, when the option0-M1+option1-M1 scheme is applicable to Ns=1, and the characteristics of this scheme are that it is the combination of two independent option, and is specifically shown in table 20.
Table 20
Figure G2009101374523D00361
As shown in Table 20, the combination of so-called option, exactly with these two kinds independently option separately selected repeated link subframe queue according to time order and function, the processing of each repeated link subframe is still carried out according to the processing mode of original option, and the relation of HARQ also keeps the relation among original option.This also is the embodiment of characteristic separate between each option.It is very simple that this characteristic is got up the combination operation of option.In real system, can determine to increase the number of combinations of option according to the service conditions of repeated link reality, if traffic carrying capacity is little during i.e. beginning, select an option, after a period of time, traffic carrying capacity increases, just increase an option again, forming the combination of option.
Here the number of combinations of option can be more than or equal to 2, namely can allow combine more than 2 option.The operation of other option combination in table 12 and the table 13, similar with said method, do not repeat them here.
3、option0-M2
When in like manner, the option0-M2 scheme is applicable to Ns=1.Second kind of processing method is applied to the DL subframe 0 of option0, specifically shown in table 21.
Table 21
Figure G2009101374523D00381
Option0-M2 can guarantee that not only access link RN-＞UE_RN is unaffected, guarantees that simultaneously the HARQ sequential of repeated link satisfies the sequential relationship of LTE FDD fully.
Other option and option0-M2 principle in the table 13 are similar, and the combination of option also is that option is not made putting together of any change, do not repeat them here.
4、option0+option1
Option in the table 14 and combination thereof all are under the situation of Ns=2 or 4.Here select for use the method for first kind of processing method situation 2 to handle DL subframe{0 among the option, 4,5,9}, thus obtain table 22.
Table 22
Figure G2009101374523D00382
Figure G2009101374523D00391
The processing method of each subframe is shown in table 22 in this scheme, and the combination of option also is that two option are not made putting together of any change.The processing of other option combinations also is similar in the table 14.
Shown in Figure 10 b, in another embodiment of the present invention, it is the configuration scenario Alt 2[optionm in the table 9], m=0, an example of 2,6, this moment is at frame[n, n+3] chronomere on, the number of subframes that is used for repeated link is 8, mutually deserved repeated link is 8: 32 with the ratio of the number of subframes of access link.
If the repeated link subframe of use shown in Figure 10 b determined according to the actual conditions of oneself in the base station, the mode that can to adopt with a frame be the bitmap in cycle is informed relay station and/or the adjacent area under this base station, namely uses bit i, i=0,1,2,3,4,5 corresponding DL subframe n successively, n=1,2,3,6,7,8, the bitmap information that be cycle with a frame this moment is that " 000101 " indicates the DL subframe n=6 in each frame, 8 are used for repeated link, and corresponding UL subframe (n+4) mod10=0,2 also are used for repeated link, and the configuration in other cycle (1 frame) is identical.The bitmap mode that is the cycle with a frame is applicable to that the configuration of repeated link subframe on each frame is identical situation, only needs the information of informing of 6 bits this moment.The configuration information of this repeated link subframe can pass through system message or high level (high layer) configuration information, or the relay station initialization is informed.Relay station can distribute Alt1 option k, k=1 according to the relation shown in the table 9 after obtaining this configuration information, 3,5,7 corresponding subframes are used to R8/9/10-UE, and these UE use the corresponding HARQ sequential of Alt1 on these subframes, and this sequential can guarantee backward compatibility; Can also distribute Alt 2 option k, k=1,3,4,5,6,7,8,9 corresponding subframes are used to R10-UE, and these UE use the corresponding HARQ sequential of Alt2 on these subframes.
At frame[n, n+3] on, using the maximum DL/UL process number of the UE of the corresponding HARQ sequential of Alt1 is 4, and using the maximum DL/UL process number of the UE of the corresponding HARQ sequential of Alt2 is 8, and the maximum DL/UL process number of repeated link is 2.
{ 1,2,3,7} all can be used for the MBMS business of this relay station to the DL subframe.If it is that { 2,3,6}, then { 2,3} can be configured to the MBSFN subframe for the MBMS business to public DL subframe that other base station/relay stations that this moment and this base station/relay station are in same MBMS service area can be used for the DL subframe of MBMS business.Can dispose this moment by the mode of one frame bitmap among the LTE.
For the configuration scenario Alt 2[option m in the table 9], m=0,2,6, Alt2 option m also can select in system, m=0, in 2,6 any 1,2, or the mode of 3 elementary cell combinations is used for repeated link, repeats no more here.In order to satisfy backwards compatibility, this configuration scenario Alt2 optionm, m=0,2,6 are suitable for following situation uses: at frame[n, n+3] chronomere on, the subframe that is used for the UL/DL repeated link is not more than 12.
Shown in Figure 10 c, in another embodiment of the present invention, it is the configuration scenario Alt2 optionm in the table 9, m=1, an example of 5,7, this moment is at frame[n, n+3] chronomere on, the number of subframes that is used for repeated link is 12, mutually deserved repeated link is 12: 28 with the number of subframes ratio of access link.
Similarly, the mode that it is the bitmap in cycle that system can adopt with a frame is informed the relay station under this base station, its bitmap information is that the DL subframe n=1 in each frame is indicated in ' 101010 ', 3,7 are used for repeated link, and corresponding UL subframe (n+4) mod10=5,7,1 also are used for repeated link.Relay station can distribute Alt1 option k according to the relation shown in the table 9 then, k=0, and 2,4,6 corresponding subframes are used to R8/9/10-UE, and these UE use the corresponding HARQ sequential of Alt1 on these subframes; Can also distribute Alt 2 option k, k=0,2,3,4,6,8,9 corresponding subframes are used to R10-UE, and these UE use the corresponding HARQ sequential of Alt2 on these subframes.
At frame[n, n+3] on, using the maximum DL/UL process number of the UE of the corresponding HARQ sequential of Alt1 is 4, and using the maximum DL/UL process number of the UE of the corresponding HARQ sequential of Alt2 is 7, and the maximum DL/UL process number of repeated link is 3.
{ 2,6,8} all can be used for the MBMS business of this relay station to the DL subframe, and can dispose this moment by the mode of one framebitmap.
In like manner, for the configuration scenario Alt2 option m in the table 9, m=1,5,7 times, Alt2 option m also can select in system, m=1, in 5,7 any 1,2, or the mode of 3 elementary cell combinations is used for repeated link, repeats no more here.In order to satisfy backwards compatibility, this configuration scenario Alt2option m, m=1,5,7 are suitable for following situation uses: at frame[n, n+3] chronomere on, the subframe that is used for the UL/DL repeated link is not more than 12.
Shown in Figure 10 d, in another embodiment of the present invention, it is the configuration scenario Alt2 optionm in the table 9, m=0,2,6,1,5, an example of 7, this moment at frame[n, n+3] chronomere on, the number of subframes that is used for repeated link is 24, and mutually deserved repeated link is 24: 16 with the number of subframes ratio of access link.
The bitmap information that be unit with a frame this moment is that the DL subframe n=1 in each frame is indicated in ' 111111 ', and 2,3,6,7,8 are used for repeated link, and corresponding UL subframe (n+4) mod10=5, and 6,7,0,1,2 also are used for repeated link.According to the relation shown in the table 9, there is not the elementary cell among the Alt1, namely do not satisfy the subframe of the HARQ sequential of LTE R8 fully and use to R8/9-UE, the UL/DL process of R8/9-UE this moment on the access link subframe has the loss of process; But can distribute Alt 2option k, k=3,4,8,9 corresponding subframes are used to R10-UE, and these UE use the corresponding HARQ sequential of Alt2 on these subframes.
At frame[n, n+3] on, using the maximum DL/UL process number of the UE of the corresponding HARQ sequential of Alt2 is 4, the maximum DL/UL process number of repeated link is 6.
In the chronomere of the integral multiple of frame, { outside 0,4,5, the 9}, remaining DL subframe all is used for repeated link, then under this disposes, can't support multicast MBMS business except all DL subframes that not can be configured to the MBSFN subframe.
For the configuration scenario Alt2 option m in the table 9, m=0,2,6,1,5,7 times, Alt2 option m also can select in system, m=0, the mode of any k elementary cell combination in 2,6,1,5,7 is used for repeated link, and 1≤k≤6 repeat no more here.
In order to satisfy backwards compatibility, this configuration scenario Alt2 option m, m=0,2,6,1,5,7 are suitable for following situation uses: at frame[n, n+3] chronomere on, be used for the subframe of UL/DL repeated link greater than 12.
Shown in Figure 10 e, in another embodiment of the present invention, use four elementary cell combination Alt2option{0,2,6} and Alt3{5} are used for repeated link, it is an example of index 1 corresponding configuration scenario in the table 9, adopt the mode of three second class elementary cells and the 3rd class elementary cell combination, this moment is at frame[n, n+3] chronomere on, the number of subframes that is used for repeated link is 15, and corresponding repeated link is 15: 25 with the number of subframes ratio of access link.
Because the configuration of repeated link subframe is different on each frame, the mode that can to adopt with four frames be the bitmap in cycle is informed the relay station under this base station, and the DL/UL subframe numbers is 0,1,2 in the chronomere of four frames ... 39.Use bit i, i=0,1,2 ..., the DL subframe n in corresponding these four frames of 23 difference orders, n=1,2,3,6,7,8,11,12,13,16,17,18,21,22,23,26,27,28,31,32,33,36,37,38, indicate DL repeated link subframe shown in Figure 10 e with four frames bitmap information that is unit for " 110101010111010101011101 " this moment, and corresponding UL subframe (n+4) mod M, and M is the UL subframe sum on the number of cycles of frame, also is used for repeated link.Be the different situation of repeated link sub-frame configuration that the bitmap mode of unit generally is used for each frame with the integral multiple (＞1) of frame, and the information of informing that need this moment is more, as 24 bits.
The base station also can adopt the mode of the bitmap of elementary cell to indicate, namely with the corresponding elementary cell that may be used for repeated link of each bit, configuration shown in Figure 10 e uses " 10100110 " to indicate option i, i=0,2,5,6 have been used for repeated link, and then the UL in this elementary cell and DL subframe are used for repeated link.At this moment, the indicating mode of the bitmap of elementary cell, the only information of informing of need 8Bit.Relay station is according to the relation shown in the table 9 after obtaining the configuration information of this repeated link subframe, can distribute Alt1 option k, k=1,3,7 corresponding subframes are used to R8/9/10-UE, and these UE use the corresponding HARQ sequential of Alt1 on these subframes; Can also distribute Alt 2 option k, k=3,4,8,9 corresponding subframes are used to R10-UE, and these UE use the corresponding HARQ sequential of Alt2 on these subframes.
At frame[n, n+3] on, using the maximum DL/UL process number of the UE of the corresponding HARQ sequential of Alt1 is 3, and using the maximum DL/UL process number of the UE of the corresponding HARQ sequential of Alt2 is 4, and the maximum DL/UL process number of repeated link is 4.
At frame[n, n+3] chronomere on, { 0,4,5,9} and be used for all can be used for the MBMS business of this relay station outside the subframe of repeated link, can dispose this moment by the mode of four framebitmap except the DL subframe.
For the 1 corresponding configuration scenario of index in the table 9, Alt 2[option m also can select in system] and Alt 3[option n]; M=0,2,6; N=1, the mode of any k elementary cell combination in 3,5,7 is used for repeated link, and 1≤k≤7 repeat no more here.
Consider backwards compatibility and the complexity of system, index 1 corresponding configuration scenario in the table 9 generally is used for Alt 2 option{0,2,6}﹠amp; Alt 3[option n]; N=1,3,5,7 situation, this moment is at frame[n, n+3] chronomere on, be used for the subframe of repeated link greater than 12.
Shown in Figure 10 f, in another embodiment of the present invention, use Alt2 option{1,5,7} and Alt3{0,4} is used for repeated link, and it is the example of index 2 in the table 9, adopts the mode of three second class elementary cells and two the 3rd class elementary cell combinations, this moment is at frame[n, n+3] chronomere on, the number of subframes that is used for repeated link is 18, corresponding repeated link is 18: 22 with the number of subframes ratio of access link.
If the repeated link subframe of use shown in Figure 10 f determined according to the actual conditions of oneself in the base station, can adopt the above-mentioned bitmap indicating mode that is unit with four frames similarly, or the indicating mode of the bitmap of elementary cell, relay station is according to the relation shown in the table 9 after obtaining the configuration information of this repeated link subframe, can distribute Alt1 option k, k=2,6 corresponding subframes are used to R8/9/10-UE, and these UE use the corresponding HARQ sequential of Alt1 on these subframes; Can also distribute Alt2 optionk, k=3,4,8,9 corresponding subframes are used to R10-UE, and these UE use the corresponding HARQ sequential of Alt2 on these subframes.
At frame[n, n+3] chronomere on, using the maximum DL/UL process number of the UE of the corresponding HARQ sequential of Alt1 is 2, using the maximum DL/UL process number of the UE of the corresponding HARQ sequential of Alt2 is 4, the maximum DL/UL process number of repeated link is 5.
At frame[n, n+3] chronomere on, { 0,4,5,9} and be used for all can be used for the MBMS business of this relay station outside the subframe of repeated link, can dispose this moment by the mode of four framebitmap except the DL subframe.
For the 2 corresponding configuration scenarios of index in the table 9, Alt 2[option m also can select in system] ， ﹠amp; Alt 3[option n]; M=1,5,7; N=0, the mode of any k elementary cell combination in 2,4,6 is used for repeated link, and 1≤k≤7 repeat no more here.
Consider backwards compatibility and the complexity of system, index 2 corresponding configuration scenarios in the table 9 generally are used for Alt 2 option{1,5,7} ， ﹠amp; Alt 3[option n]; N=0,2,4,6 mode, this moment is at frame[n, n+3] chronomere on, be used for the subframe of repeated link greater than 12, or the elementary cell that is used for repeated link is greater than 3.
Shown in Figure 10 g, in another embodiment of the present invention, use Alt3 option{0,1} is used for repeated link, it is the 3rd class situation Alt 3[option m among the index 3 in the table 9] ， ﹠amp; Alt 3[option n]; M=0,2,4,6; N=1, an example of 3,5,7 adopts the mode of two the 3rd class elementary cells combination, this moment is at frame[n, n+3] chronomere on, the number of subframes that is used for repeated link is 6, mutually deserved repeated link is 6: 34 with the number of subframes ratio of access link.
If the repeated link subframe of use shown in Figure 10 g determined according to the actual conditions of oneself in the base station, can adopt the above-mentioned bitmap indicating mode that is unit with four frames similarly, or the indicating mode of the bitmap of elementary cell, relay station is according to the relation shown in the table 9 after obtaining the configuration information of this repeated link subframe, can distribute Alt1 option k, k=2,4,6,3,5,7 corresponding subframes are used to R8/9/10-UE, and these UE use the corresponding HARQ sequential of Alt1 on these subframes; Can also distribute Alt 2 option k, k=3,4,8,9 corresponding subframes are used to R10-UE, and these UE use the corresponding HARQ sequential of Alt2 on these subframes.
Wherein using the maximum DL/UL process number of the UE of the corresponding HARQ sequential of Alt1 is 6, and using the maximum DL/UL process number of the UE of the corresponding HARQ sequential of Alt2 is 4, and the maximum DL/UL process number of repeated link is 2.
The head and the tail of each UL subframe need reserve the transmitting-receiving change-over time, if two UL subframes link to each other, so only { 0, the 1}'s UL subframe of need in the wherein frame of these two UL subframes n is connected with each other, so at frame[n, n+3] chronomere on, except DL subframe { 0,4,5,9} reaches and is used for all can be used for the MBMS business of this relay station outside the subframe of repeated link, and can dispose this moment by the mode of four frame bitmap.
For the configuration mode of index in the table 93, Alt 3[option m also can select in system] ， ﹠amp; Alt3[option n]; M=0,2,4,6; N=1, the mode of any k elementary cell combination in 3,5,7 is used for repeated link, and 1≤k≤8 repeat no more here.
Consider backwards compatibility and the complexity of system, the configuration mode of index 3 in the table 9 generally is used for Alt 3[option m] ， ﹠amp; Alt 3[option n]; M=0,2,4,6; N=1,3,5,7 mode, this moment is at frame[n, n+3] chronomere on, be used for the subframe of repeated link greater than 12, or the elementary cell that is used for repeated link is greater than 3.
Shown in Figure 10 h, in another embodiment of the present invention, use Alt3 option{1,5,7} is used for repeated link, and it is the second class situation Alt 3[option m among the index 3 in the table 9], m=1,3,5, an example of 7, adopt the mode of three the 3rd class elementary cells combination, this moment is at frame[n, n+3] chronomere on, the number of subframes that is used for repeated link is 9, and mutually deserved repeated link is 9: 31 with the number of subframes ratio of access link.
If the repeated link subframe of use shown in Figure 10 h determined according to the actual conditions of oneself in the base station, can adopt the above-mentioned bitmap indicating mode that is unit with four frames similarly, or the indicating mode of the bitmap of elementary cell, relay station is according to the relation shown in the table 9 after obtaining the configuration information of this repeated link subframe, can distribute Alt1 option k, k=0,2,4,6,3 corresponding subframes are used to R8/9/10-UE, and these UE use the corresponding HARQ sequential of Alt1 on these subframes; Can also distribute Alt2 option k, k=0,2,3,4,6,8,9 corresponding subframes are used to R10-UE, and these UE use the corresponding HARQ sequential of Alt2 on these subframes.
Wherein using the maximum DL/UL process number of the UE of the corresponding HARQ sequential of Alt1 is 5, and using the maximum DL/UL process number of the UE of the corresponding HARQ sequential of Alt2 is 7, and the maximum DL/UL process number of repeated link is 3.
At frame[n, n+3] chronomere on, { 0,4,5,9} and be used for all can be used for the MBMS business of this relay station outside the subframe of repeated link, can dispose this moment by the mode of four framebitmap except the DL subframe.
For 3 second kinds of situation Alt 3[option of index in the table 9 m], m=1,3,5,7 configuration mode, Alt 3[option m also can select in system], m=1,3, the mode of any k elementary cell combination in 5,7 is used for repeated link, and 1≤k≤4 repeat no more here.And Alt 3 option{1 wherein, second kind of situation Alt 2 option{1 of 3,5,7} and index0,5,7} equivalence.
Configuration scenario Alt 3[option m in the table 9], m=0,2,4,6 configuration mode, Alt 3[option m also can select in system], m=0, the mode of any k elementary cell combination in 2,4,6 is used for repeated link, and 1≤k≤4 repeat no more here.And Alt 3 option{0 wherein, first kind of situation Alt 2 option{0 of index0 in 2,4,6} and the table 9, the configuration of the repeated link subframe shown in 2, the 6} is identical.
Shown in Figure 10 i, in another embodiment of the present invention, use Alt3 option{0, the subframe that 1,2,3,5,6,7} comprises is used for repeated link, it is the 3rd class situation Alt 3[option m among the index 3 in the table 9] and Alt 3[option n]; M=0,2,4,6; N=1,3,5, an example of 7, the mode that adopts seven the 3rd class elementary cells to make up, this moment is at frame[n, n+3] chronomere on, the number of subframes that is used for repeated link is 21, mutually deserved repeated link is 21: 19 with the number of subframes ratio of access link.
If the repeated link subframe of use shown in Figure 10 i determined according to the actual conditions of oneself in the base station, can adopt the above-mentioned bitmap indicating mode that is unit with four frames similarly, or the indicating mode of the bitmap of elementary cell, relay station is according to the relation shown in the table 9 after obtaining the configuration information of this repeated link subframe, can distribute Alt1 option k, the corresponding subframe of k=4 is used to R8/9/10-UE, and these UE use the corresponding HARQ sequential of Alt1 on these subframes; Can also distribute Alt2 option k, k=3,4,8,9 corresponding subframes are used to R10-UE, and these UE use the corresponding HARQ sequential of Alt2 on these subframes.
Wherein using the maximum DL/UL process number of the UE of the corresponding HARQ sequential of Alt1 is 1, and using the maximum DL/UL process number of the UE of the corresponding HARQ sequential of Alt2 is 4, and the maximum DL/UL process number of repeated link is 7.
At frame[n, n+3] chronomere on, { 0,4,5,9} and be used for all can be used for the MBMS business of this relay station outside the subframe of repeated link, can dispose this moment by the mode of four framebitmap except the DL subframe.
For the configuration mode of index in the table 93, Alt2[option m also can select in system] ， ﹠amp; Alt3[option n]; M=0,2,6; N=1, the mode of any k elementary cell combination in 3,5,7 is used for repeated link, and 1≤k≤7 repeat no more here.
In the specific embodiment of the present invention, the configuration mode of employed repeated link subframe is subclass of configuration mode shown in the table 9, and these configuration modes are concrete as table 23.
Table 23
Figure G2009101374523D00461
Shown in table 23, classify from less to more according to the number of the elementary cell that is used for repeated link, be to classify from less to more by the UL/DL number of subframes that is used for repeated link in essence.And has only a kind of definite repeated link sub-frame configuration mode under every kind of classification; The concrete configuration mode that uses which kind of repeated link subframe under every kind of classification, the configuration mode of any one repeated link subframe that satisfies this class definition shown in can option table 9, wherein a kind of example just shown in the table 23.This moment is in integral multiple (4 times) unit of frame, the number of subframes that is used for repeated link is 4* (index+1), the ratio of the number of subframes of repeated link and access link is 4* (index+1): (Nf-4* (index+1)), the number of UL/DL subframe in the integral multiple of Nf=frame (4 times) unit, Nf=40 among the LTE FDD.And the mode of base station indication repeated link sub-frame configuration can be used 3 bits, directly indicates the configuration mode of repeated link subframe.
Repeated link as shown in table 11 and the HARQ sequential on the access link specifically can be specifically shown in table 24.
Table 24
Figure G2009101374523D00471
As seen, the HARQ sequential on repeated link and the access link is all comparatively simple, is easy to the realization of system.
In specific embodiment of the present invention, the configuration mode of employed repeated link subframe is subclass of configuration mode shown in the table 9, and these configuration modes are specifically as shown in Table 25.
Table 25
Figure G2009101374523D00472
As shown in Table 25, in the chronomere of the integral multiple (4 times) of frame, when satisfying certain condition, the DL/UL subframe that for example is used for repeated link in the cycle of 4 frame is used the configuration mode of index=0 during smaller or equal to 12; When satisfying certain condition, for example the DL/UL subframe that is used for repeated link in the cycle of 4 frame is greater than 12, and will keep backwards compatibility, in the time of namely will supporting R8/9-UE and not have the loss of HARQ process, uses the configuration mode of index=1; When satisfying certain condition, for example the DL/UL subframe that is used for repeated link in the cycle of 4 frame is greater than 12, and do not need to keep backwards compatibility, namely can accept the section H ARQ process loss of R8/9-UE, or when not having R8/9-UE, use the configuration mode of index=2.
The configuration mode of the repeated link subframe shown in system's dial gauge 25 is as follows:
Field (1bit): be used to refer to the employed HARQ sequential of repeated link kind, put the HARQ sequential of 1 correspondence " UL HARQ re-transmission period is 10ms "; Put the HARQ sequential of 0 correspondence " UL HARQ re-transmission period is the integral multiple of 8ms ".
For index=0,2 configuration mode uses " with the integral multiple (1 times) of the frame bitmap as unit " (6bits), bit i, i=0,1,2,3,4,5 corresponding DL subframe n successively, n=1,2,3,6,7,8, bit i set represents that corresponding DL subframe is used for repeated link, and corresponding UL subframe (n+4) mod 10 also is used for repeated link; Otherwise, reset.And use UL HARQ re-transmission period to be 10ms in these subframes " the HARQ sequential.
For the configuration mode of index=1, " bitmap of the elementary cell " mode (8bits) of use is indicated, and namely is used for the elementary cell of repeated link with the Bitmap indication, i.e. bit i, i=0,1,2,3,4,5,6,7 corresponding elementary cell option i successively, i=0,1,2,3,4,5,6,7, bit i set represents that corresponding elementary cell is used for repeated link, otherwise, reset.And use the ULHARQ re-transmission period to be the integral multiple of 8ms in these subframes " the HARQ sequential.
For the configuration mode of index=1, can also use " mode of the bitmap of initial subframe " to indicate, namely use each the bit i among the Bitmap, i=0,1,2,3,4,5,6,7 difference are 8 possibility values of the interior initial subframe numbers a of corresponding UL HARQ re-transmission period successively, a={0,1,2 ..., L-1}, L=8, for each bit, bit puts 1, expression a can get corresponding value, and bit puts 0, and expression a cannot get corresponding value.Obtain several values that a can get according to Bitmap, at each value of resulting a, can obtain one group of descending sub frame and sub-frame of uplink respectively according to following formula then, and these subframes are used for the repeated link transmission.Subframe numbers i=(a+k*L) modM that then is used for the descending sub frame of repeated link, and imodN ≠ 0,4,5,9 are used for subframe numbers j=(i+b) modM of the sub-frame of uplink of repeated link, N=10 wherein, M=40, b=4.
For the configuration mode of index=1, can also use another kind of " bitmap of elementary cell " mode (5bits) of simplifying to indicate.Be bit i, i=0,1,2,3,4, wherein, and the value K of bit i=4, K=1 represents four elementary cell option{0,2,4,6} is all for repeated link; K=0 represents four elementary cell option{1, and 3,5,7} is all for repeated link; Remaining bit i, i=0,1,2,3 indicate elementary cell option k=i*2+K respectively, whether are used for repeated link, and set represents for repeated link, otherwise, reset, wherein k=(i+K) * 2, and K is the value of bit i=4.
Obviously, this is " integral multiple with frame is the bitmap of unit " and " bitmap of elementary cell " two kinds of a kind of hybrid modes of informing mode.
Repeated link as shown in table 11 and the HARQ sequential on the access link, specifically shown in table 26.
Table 26
Figure G2009101374523D00491
As seen, HARQ sequential on repeated link and the access link is all comparatively simple, under every kind of configuration, can only have a kind of HARQ sequential on the repeated link, be easy to the realization of system, and can satisfy the flexible configuration of repeated link subframe and the evolution of backwards compatibility and future network.
The specific embodiment of the invention can be applicable to the fusion of LTE network and LTE-A network equally, the embodiment of the invention has proposed a kind of data transmission method of network node, this network node is specially LTE-A UE and LTE UE, this method comprises: in LTE FDD system, integral multiple with frame is that subframe is selected by unit, only provide proprietary service for LTE-A UE, on non-selected subframe, provide service for LTE UE and LTE-A UE, comprise the combination of an elementary cell or a plurality of elementary cells in the described unit, described elementary cell is at the integral multiple of frame being one group of sub-frame of uplink and the descending sub frame of unit, these subframes satisfy certain specific HARQ sequential, and be spaced apart the UL re-transmission period between the UL subframe, interval between the DL subframe equals the interval between the UL subframe, the subframe numbers of UL subframe equals the subframe numbers+OFFSET of DL subframe, and wherein OFFSET is the ACK/NACK feedback interval of the DL process on this DL subframe; Carry out transfer of data according to the subframe of selecting.This method has guaranteed the service scenarios of LTE_A network than the uniqueness of LTE network, and namely network can be UE_LTE and UE_LTE_A service simultaneously, and only for UE_LTE_A provides some proprietary service scenarios, thereby effective fusion of realization LTE and LTE-A.
Concrete grammar can for: selecting some subframes is the UE_LTE_A special use, and provides proprietary service for UE_LTE_A on these subframes; And in remaining subframe, eNB provides generic services for UE_LTE and UE_LTE_A simultaneously.And the system of selection of above-mentioned repeated link subframe can be applicable to select special-purpose subframe for UE_LTE_A fully in the embodiment of the invention.Be specifically as follows:
In the UNE of LTE and LTE-A, eNB, UE_LTE and UE_LTE_A will communicate according to pattern shown in Figure 11, and wherein T2 is exactly the special-purpose subframe of selecting for UE_LTE_A; T1 then is remaining subframe, and being used for simultaneously providing service for UE_LTE and UE_LTE_A.The special-purpose subframe of UE_LTE_A is specifically shown in table 27:
Table 27
Figure G2009101374523D00501
As shown in Table 27, all option among Fig. 3 and combination thereof all can be used as the special-purpose subframe of UE_LTE_A.And for each option, all satisfy the sequential relationship of LTE FDD HARQ.
And for UE_LTE, the scheduling of the DL data of eNB on DL subframe n, wherein n ∈ 0,4,5,9} can have two kinds of situations, and is specifically shown in table 28:
Situation 1, eNB is to UE_LTE scheduling DL data, and then UE_LTE need be to eNB feedback UL ACK/NACK on UL subframen+4.
Situation 2, eNB is not to UE_LTE scheduling DL data, and then UE_LTE need be to eNB feedback UL ACK/NACK on UL subframen+4.
Table 28
Figure G2009101374523D00512
Certainly, when if LTE-A UE can use the HARQ sequential that is different from LTE UE, also can use subframe as shown in table 9 to choose mode, the subframe that just will wherein be used for repeated link provides the subframe of the proprietary service of LTE-A to use to LTE-A UE as being used for, and the subframe of Alt1 elementary cell correspondence uses for LTE UE; And can guarantee that LTE-A UE and LTE-A UE do not have the collision of HARQ process.If use configuration mode as shown in the table, then have the collision that LTE-A UE and LTE-A UE do not have the HARQ process, can just can not guarantee the proprietary service of LTE-A fully this moment by distinguishing the process that UE distinguishes collision on the subframe of collision.
Table 29
for LTE-A UE for LTE UE
Alt2[option m]，m＝0，1， 2...9 Alt1[option k]，k＝0，1，2，...9
No matter the UE_LTE-A of eNB adopts the sub-frame configuration mode, and the embodiment of the invention all still can guarantee UE _ LTE ↔ eNB Between satisfy the constraint of LTE FDD, do not influence the proper communication of UE_LTE, thereby realize effective fusion of LTE and LTE-A network.
Simultaneously, the embodiment of the invention also is by a kind of processing method of LTE to the LTE-A smooth evolution, namely according to the described method of the embodiment of the invention and relevant treatment, some subframes of choosing in the LTE network provide the exclusive service of LTE-A network than the LTE network for UE_LTE_A.
As shown in figure 12, be the structure chart of a kind of network node of the embodiment of the invention, this network node comprises:
Receiver module 121 is used for receiving the repeated link sub-frame information, and described repeated link subframe is configured in the subframe that with the integral multiple frame is the cycle, has specific mixing and retransmits the HARQ sequential automatically;
Transport module 122 carries out the repeated link transmission according to the definite repeated link subframe of repeated link sub-frame information that described receiver module receives.
The network node that present embodiment provides can be carried out the method that the above embodiment of the present invention provides, and is illustrated in the method that is configured in above-described embodiment of the repeated link subframe among this embodiment, does not repeat them here.
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.
More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.

Claims (13)

1. a relay transmission method is characterized in that, is applied to comprise in Long Term Evolution (LTE) the FDD system:
Relay station receives the repeated link subframe configuration information, described repeated link subframe is configured according to the combination of elementary cell or elementary cell, described elementary cell is formed by having specific sub-frame one group of descending sub frame and sub-frame of uplink at interval in the integral multiple frame, the specific sub-frame of described descending sub frame is spaced apart up mixing and retransmits the integral multiple of (HARQ) re-transmission period or the integral multiple of frame automatically, the specific sub-frame of described sub-frame of uplink equals the specific sub-frame interval of described descending sub frame at interval, the subframe numbers of described sub-frame of uplink=(subframe numbers+side-play amount of described descending sub frame) mod M, described M is descending sub frame number or sub-frame of uplink number all in the described integral multiple frame, and described side-play amount is natural number;
Carry out the repeated link transmission according to described repeated link subframe.
2. method according to claim 1 is characterized in that, the downlink relay link sub-frame configuration in the described repeated link subframe is Multicast Broadcast Single Frequency Network (MBSFN) subframe.
3. according to the arbitrary described method of claim 1 to 2, it is characterized in that, describedly carry out repeated link transmission according to described repeated link subframe and comprise:
N sends upstream data in the repeated link subframe, receives at repeated link subframe n+k and determines (ACK) or uncertain (NACK) information, and described n is integer, and described k is 4,6 or 12.
4. according to the arbitrary described method of claim 1 to 2, it is characterized in that described method also comprises:
The upstream data that on repeated link subframe n+j described repeated link subframe n is sent retransmits, and described j=L*K, described L are natural number, and described K equals 8 or 10.
5. according to the arbitrary described method of claim 1 to 2, it is characterized in that described method also comprises:
Downlink data receiving on repeated link subframe m sends definite (ACK) or uncertain (NACK) information at repeated link subframe m+4, and described m is integer.
6. according to the arbitrary described method of claim 1 to 2, it is characterized in that described configuration information also comprises effective time, be used to indicate this configuration information validity in time described effective time, equal the integral multiple of frame described effective time; Perhaps,
Described configuration information carries out the cycle indication by the base station, and the described cycle equals the integral multiple of frame.
7. according to the arbitrary described method of claim 1 to 2, it is characterized in that described method further comprises: described repeated link subframe configuration information is indicated in the bitmap mode.
8. method according to claim 7, it is characterized in that, the corresponding bit of at least one descending sub frame in the described integral multiple frame, this bit indicates corresponding descending sub frame whether to be used for the repeated link transmission, and described bit number of indicating in the bitmap mode equals not comprise in the described integral multiple frame descending sub frame number of broadcast channel, synchronizing channel and paging channel place subframe.
9. method according to claim 1 is characterized in that, the corresponding bit of described each elementary cell, this bit indicate corresponding elementary cell whether to be used for the repeated link transmission.
10. method according to claim 9 is characterized in that, the number of bit equals the number of the elementary cell in cycle of this integral multiple frame.
11. according to the arbitrary described method of claim 1 to 2, it is characterized in that, the terminal that non-repeated link sub-frame configuration in the described integral multiple frame serves for relay station, described terminal comprises Long Term Evolution (LTE) system version eight (Rel-8) terminal, and/or LTE version nine (Rel-9) terminal, and/or LTE version ten (Rel-10) terminal.
12. method according to claim 1 is characterized in that, the ascending HARQ in the repeated link subframe of described configuration is synchronous HARQ or asynchronous HARQ.
13. a network node is characterized in that, is applied to comprise in Long Term Evolution (LTE) the FDD system:
Receiver module, be used for receiving the repeated link sub-frame information, described repeated link subframe is configured according to the combination of elementary cell or elementary cell, described elementary cell is formed by having specific sub-frame one group of descending sub frame and sub-frame of uplink at interval in the integral multiple frame, the specific sub-frame of described descending sub frame is spaced apart up mixing and retransmits the integral multiple of (HARQ) re-transmission period or the integral multiple of frame automatically, the specific sub-frame of described sub-frame of uplink equals the specific sub-frame interval of described descending sub frame at interval, the subframe numbers of described sub-frame of uplink=(subframe numbers+side-play amount of described descending sub frame) mod M, described M is descending sub frame number or sub-frame of uplink number all in the described integral multiple frame, and described side-play amount is natural number;
Transport module carries out the repeated link transmission according to the definite repeated link subframe of repeated link sub-frame information that described receiver module receives.
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