CN101166055B - Multi-hop relay method and multi-hop relay system - Google Patents
Multi-hop relay method and multi-hop relay system Download PDFInfo
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Abstract
This invention discloses a multi-hop relay method including: data are interacted and transferred between a base station and relays or among relays by relay sub-frames and terminals of the base station, relays or their administrative regions interact service data by terminal sub-frames. This invention also discloses a multi-hop relay system.
Description
Technical field
The present invention relates to the relaying technique in the mobile communication, particularly multi-hop relay method and multihop relay system.
Background technology
In wireless communication system, because electromagnetic path attenuation, particularly adopt the electromagnetic wave of high frequency carrier, and building reason such as block, (Base Station, coverage BS) make that the wireless communication signals intensity of subregion is lower to have limited the base station, (Mobile Station, communication quality MS) will become very poor to be positioned at the travelling carriage as terminal in these zones.Therefore, for solving the little problem of BS coverage that electromagnetic wave attenuation causes, (Relay Station RS) carries out relay process to the wireless communication signals between BS and the travelling carriage, the decay of compensating signal to need to use relay station usually.
RS is responsible for the forwarding of data between BS and the travelling carriage or signaling information.
With micro-wave access to global intercommunication (Worldwide Interoperabilityfor Microwave Access based on IEEE 802.16 agreements, WiMAX) system is an example, at time division duplex (Time Division Duplex, TDD) under the pattern, (Orthogonal FrequencyDivision Multiplexing Access, OFDMA) the base station frame of mode and relevant terminal frame are realized relaying by OFDM between BS, RS and the MS.
Fig. 1 a is the base station frame structure schematic diagram of OFDMA mode in the prior art; Fig. 1 b is the terminals frames structural representation of OFDMA mode in the prior art.The base station frame is made up of descending sub frame and sub-frame of uplink, and descending sub frame is used to send downlink data, and sub-frame of uplink is used to receive upstream data.Emission/reception switching slot (Transmmit/Receive Transition Gap, TTG) be converted to the accepting state elapsed time at interval for BS from emission state, (Receive/Transmmit TransitionGap RTG) is BS is converted to emission state from accepting state the time interval to reception/transmission switching slot.User platform emission/reception switching slot (Subscriber Station Rx/Tx Gap, SSRTG) be MS is converted to emission state from accepting state the time interval, (Subscriber StationTx/Rx Gap SSTTG) is converted to the accepting state elapsed time at interval for MS from emission state to user platform reception/emission switching slot.
Wherein, the logical sub-channel sequence number represents that a subchannel is made of the plurality of sub carrier wave by the subchannel sequence number of logical order arrangement.Business burst refers to the business datum of using the same-code modulation system.Frame head comprises leading and time-frequency resource allocating information etc., the wherein leading Time and Frequency Synchronization that is used for MS and BS; Time-frequency resource allocating information has then reflected user data residing running time-frequency resource position in descending sub frame and sub-frame of uplink, MS knows promptly by this information oneself should receive data from which downlink business burst, and which uplink service burst to send the data of oneself by.Insert subchannel and be used for the MS process of access network at random, BS inserts the access request that subchannel obtains MS by monitoring.
Adopt the communication system of above-mentioned relaying technique, enlarged the coverage of BS to a certain extent, but still have the little problem of BS coverage.If a plurality of RS can cascade up, realize multi-hop relay, just can make BS obtain bigger coverage.
Yet existing relay system only provides base station frame and terminals frames, is not used in the transformat definition between the RS, thereby is merely able to support the single-hop relaying, can not realize multi-hop relay, thereby can not more effective coverage that improves BS.
Summary of the invention
In view of this, a main purpose of the present invention is: provide a kind of multi-hop relay method, the coverage of more effective raising base station.
Another main purpose of the present invention is: provide a kind of multihop relay system, the coverage of more effective raising base station.
A main purpose according to above-mentioned the invention provides a kind of multi-hop relay method, may further comprise the steps:
Transmit data by the mutual relaying of relay sub-frame between base station and the relay station;
Transmit data by the mutual relaying of relay sub-frame between the relay station;
Terminal room in base station and self compass of competency is by terminal subframe interactive service data;
Terminal room in relay station and self compass of competency is by terminal subframe interactive service data.
Another main purpose according to above-mentioned the invention provides a kind of multihop relay system, comprising: base station and relay station,
Transmit data by the mutual relaying of relay sub-frame between described base station and the relay station;
Transmit data by the mutual relaying of relay sub-frame between the described relay station;
Terminal room in described base station and self compass of competency is by terminal subframe interactive service data;
Terminal room in described relay station and self compass of competency is by terminal subframe interactive service data.
As seen from the above technical solution, website, for example BS or RS carry out the mutual of business datum with higher level's website and/or the RS of subordinate respectively by relay sub-frame, realize the multi-hop relay of uplink service and downlink business.
And the present invention can realize the cascade of different ability websites; The present invention also realizes rational resource allocation, resource adjustment by relay sub-frame, has reduced the propagation delay time that resource allocation and resource are adjusted, and has accelerated the process of resource allocation and adjustment, has improved the operating efficiency of multihop relay system; Dynamic trunking frame head distribution method among the present invention, the variation of the RS quantity in can the flexible adaptation multihop relay system makes full use of system resource, has improved the reliability of system; Transfer of data among the present invention and relaying feedback method make website to control relay transmission flexibly, have guaranteed reliability, the practicality of multi-hop relay.
Description of drawings
Fig. 1 a is the base station frame structure schematic diagram of OFDMA mode in the prior art.
Fig. 1 b is the terminals frames structural representation of OFDMA mode in the prior art.
Fig. 2 is the multi-hop relay topological structure schematic diagram in the embodiment of the present invention.
Fig. 3 a is the frame structure schematic diagram of multihop relay system cascade mode 1 in the embodiment of the present invention.
Fig. 3 b is the frame structure schematic diagram of multihop relay system cascade mode 2 in the embodiment of the present invention.
Fig. 4 is the exemplary block diagram of multihop relay system in the embodiment of the present invention.
Fig. 5 is the exemplary process diagram of multi-hop relay method in the embodiment of the present invention.
Fig. 6 is the flow chart of multi-hop relay method in the embodiment of the present invention.
Fig. 7 a is the schematic diagram of resource allocation methods 1 in the multi-hop relay method in the embodiment of the present invention.
Fig. 7 b is the schematic diagram of resource allocation methods 2 in the multi-hop relay method in the embodiment of the present invention.
Fig. 8 is the flow chart of resource allocation methods 1 in the multi-hop relay method in the embodiment of the present invention.
Fig. 9 is the flow chart of resource adjusting method in the multi-hop relay method in the embodiment of the present invention.
Figure 10 is the schematic diagram of the repeat transmitted subframe 1 in the embodiment of the present invention.
Figure 11 is the flow chart that distributes RFCH in the embodiment of the present invention in the multi-hop relay method.
Figure 12 is the flow chart that discharges RFCH in the embodiment of the present invention in the multi-hop relay method.
Figure 13 a is the schematic diagram from primary resource time-frequency dividing mode of the repeat transmitted subframe 2 in the embodiment of the present invention.
Figure 13 b is the schematic diagram from primary resource time dividing mode of the repeat transmitted subframe 2 in the embodiment of the present invention.
Figure 14 a is the schematic diagram from primary resource time dividing mode of the repeat transmitted subframe 3 in the embodiment of the present invention.
Figure 14 b is the schematic diagram from primary resource frequency partition mode of the repeat transmitted subframe 3 in the embodiment of the present invention.
Figure 15 is the sub-carrier distribution manner schematic diagram of RFCH subchannel in the multi-hop relay method in the embodiment of the present invention.
Figure 16 is the schematic diagram of RL-MAP message body structure and relay transmission data block encapsulating structure in the embodiment of the present invention.
Figure 17 is the resource indication schematic diagram of multi-hop relay method in the embodiment of the present invention.
Figure 18 be in the embodiment of the present invention in the multi-hop relay method downlink relay transmit the transmission method flow chart of data.
Figure 19 be in the embodiment of the present invention in the multi-hop relay method uplink relay transmit the transmission method flow chart of data.
Figure 20 is the relaying feedback method schematic diagram in the multi-hop relay method in the embodiment of the present invention.
Figure 21 is the schematic diagram of the message bit pattern coded system of HARQ feedback message in the embodiment of the present invention.
Figure 22 is the schematic diagram of low ability RS cascade system 1 in the embodiment of the present invention.
Figure 23 is the schematic diagram of low ability RS cascade system 2 in the embodiment of the present invention.
Figure 24 is the schematic diagram of low ability RS cascade system 3 in the embodiment of the present invention.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, below embodiment of the present invention is further described.
The basic thought of embodiment of the present invention is: website carries out the mutual of business datum with higher level's website and/or the RS of subordinate respectively by relay sub-frame, realizes the multi-hop relay of uplink service and downlink business.
Wherein, website comprises BS and/or RS.
Fig. 2 is the multi-hop relay topological structure schematic diagram in the embodiment of the present invention.As shown in Figure 2, this multihop relay system comprises M0, M1, M2, BS, RS1 and RS2.The RS1 level is coupled to the subordinate of BS, is the first jumping website; The RS2 level is coupled to the subordinate of RS1, is the second jumping website; M0, M1, M2 are respectively the MS that belongs to BS, RS1, RS2 compass of competency.
In the above topology structure, can comprise that according to actual conditions the 3rd jumps and more website.
Based on above-mentioned topological structure, transmit the business datum that needs relaying to transmit by relay sub-frame between the website, promptly relaying is transmitted data, simultaneously, by the business datum by other RS forwardings that relay sub-frame receives, also is that relaying is transmitted data.
Fig. 3 a is the frame structure schematic diagram of multihop relay system cascade mode 1 in the embodiment of the present invention.Shown in Fig. 3 a, transverse axis express time, i.e. OFDM symbolic number; The longitudinal axis is represented frequency subchannels, i.e. subcarrier.
Embodiment of the present invention further is divided into downstream station subframe (Acess Downlink with descending sub frame on the basis of existing frame format, ADL) and first relay sub-frame (FRL), sub-frame of uplink further is divided into up terminal subframe (AUL) and second relay sub-frame (SRL).TTG is the change-over time that emission state arrives accepting state; The accepting state of representing RTG arrives the change-over time of emission state; Square A represents the terminal frame head, and square R represents the frame head of relay sub-frame.
In the above-mentioned cascade system, BS periodically sends business datum by ADL to M0 successively; Send relaying by FRL to RS1 and transmit data; By the business datum of AUL reception from M0; Transmit data by the SRL reception from the relaying of RS1;
RS1 periodically sends business datum by ADL to M1 successively; Transmit data by the FRL reception from the relaying of BS; By the business datum of AUL reception from M1; Send relaying by SRL to BS and transmit data;
RS2 periodically sends business datum by ADL to M2 successively; Send relaying by FRL to RS1 and transmit data; By the business datum of AUL reception from M2; Transmit data by the SRL reception from the relaying of RS1.
Wherein, BS and RS are provided with parameter according to frame and receive and dispatch relaying forwarding data; Frame is provided with parameter and comprises that the terminal subframe is provided with parameter and relay sub-frame is provided with parameter; Frame is provided with sequence of positions and the time span ratio that parameter is used to refer to each subframe, specifically comprises the original position of following information: AUL/FRL/SRL, the time span of ADL/AUL/FRL/SRL; It can be system's predefine that frame is provided with parameter, also can be dynamic adjustment, can also be the adjustment of part predefine partial dynamic.
RS and MS can know that frame is provided with parameter, and carry out the transmitting-receiving of business datum according to this parameter.
In the multihop relay system cascade mode 1 in the present embodiment, when website sends relaying forwarding data by FRL, for example BS or RS2, after FRL, this website transfers accepting state through the stand-by period of TTG to by emission state, begins again by the business datum of AUL reception from the MS in its compass of competency, and receive relaying forwarding data by SRL after, the stand-by period of process RTG goes back to and is emission state, continues to send business datum by the MS of ADL in its compass of competency; When website sends relaying forwarding data by SRL, RS1 for example, before SRL, this website transfers emission state through the stand-by period of RTG to by accepting state, begin again to send relaying forwarding data to higher level's website and/or the RS of subordinate by SRL, and after sending business datum by the MS of ADL in its compass of competency, the stand-by period of process TTG goes back to and is accepting state, continues to transmit data by the FRL reception from the relaying of higher level's website and/or descending RS.
In order not change existing MS, i.e. the structure of common MS, the effect and the structure of downstream station subframe and up terminal subframe, identical with existing descending sub frame and sub-frame of uplink, be used for providing descending and transmitting uplink data for MS; FRL and SRL are used for transmitting between the RS for the relay transmission frame that embodiment of the present invention provides, and the relaying between RS and the BS is transmitted data.
Wherein, the time sequencing of four subframes (ADL/AUL/FRL/SRL) can be adjusted arbitrarily and not change the essence of embodiment of the present invention.Fig. 3 b is the frame structure schematic diagram of multihop relay system cascade mode 2 in the embodiment of the present invention.Shown in Fig. 3 b, the order of each subframe is: ADL, FRL, SRL, AUL.
In the above-mentioned cascade system, BS periodically sends business datum by ADL to M0 successively; Send relaying by FRL to RS1 and transmit data; Transmit data by the SRL reception from the relaying of RS1; Receive the business datum of M0 by AUL;
RS1 periodically sends business datum by ADL to M1 successively; Transmit data by the FRL reception from the relaying of BS; Sending relaying by SRL to BS transmits data, receives business datum from M1 by AUL;
RS2 periodically sends business datum by ADL to M2 successively; Send relaying by FRL to RS1 and transmit data; Transmit data by the SRL reception from the relaying of RS1; By the business datum of AUL reception from M2.
Wherein, BS and RS are provided with parameter according to frame and come the transmitting and receiving service data.
In the multihop relay system cascade mode 2 in the present embodiment, when website sends relaying forwarding data by FRL, for example BS or RS2, after FRL, this website transfers accepting state through the stand-by period of TTG to by emission state, and begin to receive relaying again and transmit data by SRL, and after the business datum that receives by AUL from the MS in its compass of competency, the stand-by period of process RTG goes back to and is emission state, continues to send business datum by the MS of ADL in its compass of competency; When website sent relaying forwarding data by SRL, for example RS1 after receiving by each subframe or sending data, needed the stand-by period through RTG or TTG, transfers to and launching or accepting state.
Relay sub-frame in the embodiment of the invention can also further be divided into: first uplink relay subframe, first downlink relay sub-frame, second uplink relay subframe and the second downlink relay relay sub-frame, promptly up FRL, up SRL, descending FRL and descending SRL;
The reiving/transmitting state of uplink and downlink FRL and uplink and downlink SRL also interlocks.
By above-mentioned cascade system as seen, embodiment of the present invention has been constructed the staggered relay sub-frame of a kind of reiving/transmitting state, thereby realizes the mutual cascade of each RS and BS.When the RS connecting system, can set the reiving/transmitting state of self relay sub-frame according to the reiving/transmitting state of its higher level's website relay sub-frame, thereby form above-mentioned staggered relay sub-frame reiving/transmitting state.Shown in Fig. 3 a and Fig. 3 b, the state of the FRL/SRL of BS is for sending out/receiving, then with the state of the FRL/SRL of the RS1 of BS cascade for receiving/send out, with the state of the FRL/SRL of the relay station RS2 of RS1 cascade for sending out/receiving, this moment, the state of MS was a silent status.And when website sent ADL/ reception AUL, the state of MS then was reception/emission state.
For a relay sub-frame, its emission state comprises simultaneously to higher level RS or BS transmission upstream data, and sends downlink data to the RS of subordinate.Relay sub-frame at the emission state of each website, be in the repeat transmitted subframe, comprise a relaying frame head R, be used to refer to the resource location that it sends data, the position of relaying frame head can be predefined, also can be when this RS connecting system dynamic assignment, as long as different relaying frame heads does not disturb mutually, or interference is very little, and the RS of cascade up and down can find the position of this relaying frame head to get final product.
In the configuration information of relaying frame head R, distribute the running time-frequency resource of FRL and SRL can for any MS, MS can think does not all the time have one's own data in these two intervals, and therefore, FRL and SRL are sightless for existing MS.But, then can under the control of RS or BS, utilize this terminal subframe and/or relay sub-frame transmission data for the novel MS that can discern FRL and SRL.
In the multihop relay system of embodiment of the present invention, comprise at least one RS, RS receives the downlink service data from higher level's website, and downlink service data is sent to RS of subordinate and/or MS; Reception is from the uplink business data of RS of subordinate and/or MS, and uplink business data is sent to higher level's website.
Fig. 4 is the exemplary block diagram of multihop relay system in the embodiment of the present invention.As shown in Figure 4, the relay system of embodiment of the present invention comprises: BS 401 and relay structure 402.
Wherein, a plurality of RS can with the series system cascade, perhaps with tree-shaped mode, netted mode cascade, can also adopt star-like mode cascade according to the relation of the superior and the subordinate.When RS passes through relay sub-frame, be FRL or SRL, when receiving business datum, judge this Frame and whether be the business datum of the MS in the compass of competency to one's name, if, then business datum is sent to corresponding MS by the terminal subframe, if not, then continue to transmit to other RS by relay sub-frame.
Fig. 5 is the exemplary process diagram of multi-hop relay method in the embodiment of the present invention.As shown in Figure 5, the multi-hop relay method may further comprise the steps in the embodiment of the present invention:
Step 501 is passed through the business datum that the mutual relaying of relay sub-frame is transmitted respectively between BS and the RS and between the RS;
Pass through terminal subframe interactive service data between the MS in the step 502, BS or RS and self compass of competency.
In the above-mentioned flow process, replace execution in step 501 and step 502, also can first execution in step 502.
Specifically, above-mentioned flow process can be expressed as:
BS and RS by the terminal subframe respectively the MS in compass of competency separately send business datum;
BS sends relaying by relay sub-frame to RS and transmits data; RS receives from the relaying of other RS in BS and/or the multihop relay system by relay sub-frame and transmits data or send relaying forwarding data by relay sub-frame other RS in BS and/or multihop relay system;
BS and RS receive the business datum that sends from MS separately respectively by the terminal subframe;
BS receives from the relaying of RS by relay sub-frame and transmits data; RS sends business datum by relay sub-frame other RS in BS and/or multihop relay system, perhaps by the business datum of relay sub-frame reception from other RS in BS and/or the multihop relay system.
In the above-mentioned flow process, the reiving/transmitting state of the relay sub-frame of RS and its higher level's website and the RS of subordinate is interlaced.
In the process of RS connecting system, system need distribute running time-frequency resource for the new RS that inserts.
Distribute the basic principle of running time-frequency resource method to be in the embodiment of the present invention: for RS and BS, the reserved resource of domination is to one's name all arranged, promptly from primary resource, each RS and BS can oneself make a strategic decision, and will the part in primary resource distribute to the RS of subordinate, as the RS of subordinate from primary resource, so just can realize resource allocation step by step, the RS that progression is low more, more little from primary resource, BS's is maximum from primary resource.Distributing after primary resource, BS and RS also can initiate the resource of having distributed is adjusted.
In embodiment of the present invention, distribution be meant the time-frequency chance that is used for sending data from primary resource, comprise sending upstream data and downlink data.Each RS uses from primary resource in relay sub-frame and sends data, and inform the website of its higher level or subordinate's cascade by the relaying frame head, this website sends the running time-frequency resource position of data, the website of cascade can obtain the data that this website sends by this relaying frame head up and down, finds one's own data by analyzing the index information that comprises in the data.
In the process of RS connecting system, system also needs to distribute the relaying frame head for each RS.
Because RS need use the relaying frame head to indicate the position of its relay resource, and the quantity dynamically changeable of RS.Variation for flexible adaptation RS quantity, and make full use of system time frequency resource, embodiment of the present invention realizes the dynamic assignment of relaying frame head by the following method: the original position of fixing first relaying frame head, fix the size of each RS relaying frame head, guarantee that each relaying frame head resource of system assignment links to each other.In the relaying frame head, comprise that system has distributed the indication information of relaying frame head quantity, this information is sent at identical resource location with BS simultaneously by all RS, and any one RS all can know the resource location of the relaying frame head that all have distributed according to this information.That is to say, know the original position of first relaying frame head, know the size of each relaying frame head, know relaying frame head quantity altogether, just can know the position of all relaying frame heads.
For the HARQ data block, whether the transmit leg website needs correctly to be received according to coming definite relaying that has sent to transmit data from the relaying feedback of one or more recipient's website.If do not receive feedback in predefined frame period, being fed back to of perhaps receiving takes defeat, and then the transmit leg website can resend this relaying and transmit data; Whether recipient's website needs the accepting state of basis from the HARQ data block of one or more transmit leg websites, correctly received to transmit leg website feedback respective data blocks.
Below, being applied to the WiMAX system with the technical scheme of embodiment of the present invention is example, and the relay system and the trunking method of embodiment of the present invention is elaborated, the relay system of present embodiment please refer to Fig. 2.
Present embodiment is dynamically adjusted frame, and that the process of parameter is set is as follows:
To existing MS, only need know that the terminal subframe is provided with parameter, i.e. the original position of AUL, the time span of AUL/ADL can be informed terminal by existing method, for example, in the terminal frame head, informs all MS by broadcast;
To RS, and the novel MS that can discern relay sub-frame, need know further that relay sub-frame is provided with parameter.As a RS, in the time of maybe can discerning the novel MS connecting system of relay sub-frame, can obtain the terminal subframe by the broadcast of existing terminal subframe parameter is set, and, higher level's website further by the form of terminal subframe with clean culture or broadcast, is provided with the RS that parameter is informed this new access with relay sub-frame.For example, send corresponding relay subframe parameter with the basic connection identifier (Basic CID) of this RS/MS or broadcasting CID message is set, it is as shown in table 1 that the relay sub-frame parameter is provided with the concrete form of message.
| Sentence structure | Bit | Remarks |
| REL_FRM_PRM{ | The relay sub-frame parameter is provided with message | |
| Management?Message?Type | 8 | The type of message sign indicating number |
| FRL?Start?Time | 32 | The zero-time of FRL |
| SRL?Start?Time | 32 | The zero-time of SRL |
| FRL?NO.OFDMA?Symbols | 8 | The number of symbols that FRL comprises |
| SRL?NO.OFDMA?Symbols | 8 | The number of symbols that SRL comprises |
| Padding} | Filling bit |
Table 1
When system carries out framing control, BS is provided with parameter by relay sub-frame with new frame, and all RS in the information notification system such as this parameter enabling time, this information can send in the mode of the MAC administrative messag of relay sub-frame, also can send by the RL-MAP of relay sub-frame, promptly the form with message body is included among the RL-MAP, identifying this message body by RIUC is frame parameter definition message body, be responsible for notifying subordinate's website by higher level's website, after new argument enabling time arrival, all RS start new parameter simultaneously and communicate, and to the new terminal subframe of subordinate MS broadcasting parameter are set in terminal subframe separately.The concrete form of corresponding frame parameter definition message body is as shown in table 2.
| Sentence structure | Bit | Remarks |
| FRM_DEF_IE | Frame parameter is provided with IE | |
| { |
4 | Trunk information entity identification sign indicating number |
| Length | 8 | The length of this IE |
| AUL?Start?Time | 32 | The zero-time of AUL |
| FRL?Start?Time | 32 | The zero-time of FRL |
| SRL?Start?Time | 32 | The zero-time of SRL |
| ADL?NO.OFDMA?Symbols | 8 | The number of symbols that ADL comprises |
| AUL?NO.OFDMA?Symbols | 8 | The number of symbols that AUL comprises |
| FRL?NO.OFDMA?Symbols | 8 | The number of symbols that FRL comprises |
| SRL?NO.OFDMA?Symbols | 8 | The number of symbols that SRL comprises |
| Enable?Time | 8 | Frame parameter enabling time |
| Padding} | Filling bit |
Table 2
In the relay system of present embodiment, BS can also be used to RS1, RS2, RS3 to distribute, adjust running time-frequency resource, distribute the relaying frame head; BS, RS1, RS2, RS3 can also be used for when the business datum that receives is the HARQ data block, in predetermined frame frame at interval, to the transmit leg transmission HARQ of business datum relaying feedback, i.e. success or failure.
Below, the multi-hop relay method in the present embodiment is elaborated.
Fig. 6 is the flow chart of multi-hop relay method in the embodiment of the present invention.As shown in Figure 6, the multi-hop relay method of embodiment of the present invention may further comprise the steps:
Wherein,, comprise the data block of the business datum of needs forwarding, be called relaying and transmit data block in the relay sub-frame transmission;
In this step, judge whether that need transmit data block to relaying feeds back, can transmit the indicating bit that whether comprises in the data block that this data block of indication needs recipient's website to feed back for judging relaying, if, for example relaying forwarding data block is data blocks such as HARQ or ARQ, then needs feedback; Each website can preestablish the frame period that sends the relaying feedback, and periodically by predetermined frame frame at interval, transmit leg to business datum sends the relaying feedback, if the transmit leg of business datum is not received the relaying feedback in predetermined frame frame at interval, then think the relaying of its transmission transmit data block not the side's of being received website correctly receive.
In the above-mentioned flow process, step 602～step 605 can be carried out according to random order, for the website in the relay system carries out the process of multi-hop relay, the execution in step that can circulate 602～step 605 by the staggered relay sub-frame of terminal subframe and reiving/transmitting state; Relaying feedback procedure in step 606 and the step 607 also can be carried out with step 602～step 605 respectively simultaneously; If transmitting in the data block, relaying do not comprise the sign that expression need be fed back, then not execution in step 606 and step 607.
In the above-mentioned steps 601, system is that the new RS that inserts distributes running time-frequency resource and relaying frame head.
Wherein, distribute running time-frequency resource that following method can be arranged: resource allocation methods 1 is distribution method step by step; Resource allocation methods 2 is the unified distribution method.
Fig. 7 a is the schematic diagram of resource allocation methods 1 in the multi-hop relay method in the embodiment of the present invention.Shown in Fig. 7 a, the total resources of establishing FRL are F, and the total resources of SRL are S, remove the shared resource of relaying frame head of FRL/SRL, and the transmitting-receiving total resources of BS are A+B, and wherein A is the FRL resource, is the transmission resources of BS, and B is the SRL resource, are the reception resources of BS.As RS1, RS2, RS3 connecting system successively, and RS1 is cascaded under the BS, and RS2 is cascaded under the RS1, and RS3 is cascaded under the RS2, and the resource allocation step of system is as follows:
RS1 is connected to BS, BS is that the RS1 distribution is first jumping from primary resource: RS1, BS is the first all jumping RS Resources allocation, because the reiving/transmitting state of RS1 relay sub-frame and BS's is staggered, BS is the resource in its distribution SRL subframe, be that BS marks off a resource B1 in resource B, give RS1 as the autonomous resource allocation of RS1;
RS2 is connected to RS1, BS be RS2 to distribute the last two-stage website from primary resource: RS2 be BS, the reiving/transmitting state of RS2 relay sub-frame is identical with BS, BS marks off a resource A1 from oneself from primary resource A, as the autonomous resource allocation of RS2 to RS2;
RS3 is connected to RS2, RS1 be RS3 to distribute the last two-stage website from primary resource: RS3 be RS1, RS1 guarantee with the nonoverlapping prerequisite of B1 under, from oneself from primary resource B, mark off a resource B2, as the autonomous resource allocation of RS3 to RS3;
The rest may be inferred, and the RS of all new accesses can be assigned with one's own from primary resource.In a word, if RS is first jumping, then BS distributes from primary resource for it; If more than or equal to double bounce, then the website by the last double bounce of the RS of new access distributes from primary resource for it.
In the said method, if RS more than or equal to double bounce, also can jump or go up double bounce, again or go up double bounce with first-class multi-hop website at interval by last one, for the new RS that inserts distributes from primary resource.
Any one RS carries out the resource adjustment, must initiate relay resource adjustment request to distributing from the website of primary resource for it, has distributed the website from primary resource to send relay resource adjustment order to any one RS by its Resources allocation.
Fig. 7 b is the schematic diagram of resource allocation methods 2 in the multi-hop relay method in the embodiment of the present invention.Shown in Fig. 7 b, be the RS Resources allocation of all new accesses by BS, allocation criteria is identical with resource allocation methods 1.The resource allocation step of system is as follows:
RS1 is connected to BS, BS is that the RS1 distribution is first jumping from primary resource: RS1, BS is the first all jumping RS Resources allocation, because the reiving/transmitting state of RS1 relay sub-frame and BS's is staggered, BS is the resource in its distribution SRL subframe, be that BS marks off resource B1 in resource B, give RS1 as the autonomous resource allocation of RS1;
RS2 is connected to RS1, BS be RS2 to distribute the last two-stage website from primary resource: RS2 be BS, the reiving/transmitting state of RS2 relay sub-frame is identical with BS, BS marks off a resource A1 from oneself from primary resource A, as the autonomous resource allocation of RS2 to RS2;
RS3 is connected to RS2, and BS is that RS3 distributes from primary resource: BS and marks off a resource B2 from own from primary resource B1, as the autonomous resource allocation of RS3 to RS3;
The rest may be inferred, and the RS of all new accesses can be distributed one's own from primary resource by BS.
Any one RS carries out the resource adjustment, must initiate relay resource adjustment request to BS, and BS can send relay resource adjustment order to any one RS.
Below, during with the RS3 connecting system, RS1 is elaborated to resource allocation methods in the present embodiment 1 for the RS3 Resources allocation is an example.
Fig. 8 is the flow chart of resource allocation methods 1 in the multi-hop relay method in the embodiment of the present invention.As shown in Figure 8, the resource allocation methods in the multi-hop relay method may further comprise the steps in the embodiment of the present invention:
In the present embodiment, before step 801, RS3 carries out the capability negotiation process with BS earlier, and BS informs RS1 with ability and the type of RS3 again.
RS can be known the autonomous resource size of self and carry out the size of the required relay resource of relay transmission that therefore, RS1 only need judge that the idling-resource and the magnitude relationship of application resource get final product in this step.
In this step, the resource size that RS1 marks off is determined according to ability and the type of RS3 by RS1 in step 801.
Step 806 to higher level's resource allocation website of RS1, sends resource and adjusts request message, request increase oneself from primary resource.
In this method, higher level's resource allocation website of RS1 is BS; To the size of higher level's site requests resource is the difference of self idling-resource and subordinate's site requests resource, or the value that calculates by preordering method for self idling-resource and subordinate's site requests resource.
Step 808～step 809, RS1 does not receive the affirmation message and the timer expiry of RS3 feedback, prepares to resend the resource allocation Indication message, and judges number of retries, if number of retries does not surpass stipulated number, then execution in step 810; If number of retries is then carried out error handling processing to surpass stipulated number, and process ends.
Before this step, set in advance waiting timer, for being provided with, retryCounter sends the number of retries that the resource allocation Indication message is allowed; In this step, if after sending resource allocation indication failure, retryCounter subtracts 1, when the count results of retryCounter is kept to 0, then judges number of retries and surpasses stipulated number; Error handling processing in this step is meant, when repeatedly not receiving the signal of this RS, can enter and judge whether this RS disconnects the flow process of connection, or think that directly this RS has disconnected connection, and the active disconnection is connected with this RS's, and discharges the resource that it takies.
Step 810 sends the resource allocation Indication message to RS3 again, and retryCounter subtracts 1, the timer zero clearing, and returns step 804.
In the above-mentioned flow process, when the RS3 connecting system, relevant resource allocation message comprises the resource allocation Indication message, and the resource allocation acknowledge message can be before RS3 formally starts relay function, when promptly being considered as MS by higher level's website, by transmitting in the terminal subframe; Also can after being considered as RS by its higher level's website, RS3 in relay sub-frame, transmit; Information interaction between RS1 and the RS3 is to transmit by the relaying of RS2 to realize.
When adopting resource allocation methods 2 to carry out resource allocation, according to the operating process that above-mentioned RS1 carried out, can pass through the distribution that resource allocation methods 2 is realized from primary resource by BS.
After resource allocation, RS and BS all can initiate the resource adjustment, comprise following two kinds of situations:
A kind of situation is initiatively to adjust, and subordinate's website is initiated resource adjustment request to higher level's website, and may be that the resource of subordinate's website is not enough this moment, need to increase the part resource, or the resource of subordinate's website is too many, wishes the release portion resource, initiates resource adjustment request by subordinate's website to higher level's website;
Another kind of situation is passive adjustment, higher level's website is initiated resource adjustment order to subordinate's website, triggered by the adjustment of higher level's site resource this moment, also may be that higher level's website carries out the resource adjustment, with the more efficient use resource, as for avoiding resource fragmentation, or, adjust resource ratio etc. according to the load of its subordinate's website.
Fig. 9 is the flow chart of resource adjusting method in the multi-hop relay method in the embodiment of the present invention.As shown in Figure 9, initiate resource with RS3 to RS 1 and be adjusted into example, the resource adjusting method in the multi-hop relay method of embodiment of the present invention may further comprise the steps:
Before this step, whether RS3 at first judges oneself needs to carry out the resource adjustment, if needed, then sends resource adjustment request to RS1.
Step 902 after RS1 receives the resource adjustment request of RS3, judges it is to discharge resource or application resource earlier, if discharge resource, then execution in step 903; If the application resource, then execution in step 904.
Step 903 is selected adequate resources piece position and size according to the size of RS3 request release resource, adjusts response message by resource and informs RS3, and the resource size that resource size that reality discharges and RS3 request discharge can not wait.
After this step, if after RS3 receives that the resource of RS1 is adjusted response message, adjust acknowledge message to the RS1 feedback resources, then the resource dispose procedure completes successfully, and process ends.
In this step, RS1 is transmitted by the RS2 relaying to the resource adjustment indication that RS3 sends; Before this step, set in advance waiting timer, and send the number of retries that the resource allocation Indication message is allowed for retryCounter is provided with.
After RS3 receives that the resource of RS1 is adjusted response message, can adjust acknowledge message to the RS1 feedback resources, resource adjustment so far completes successfully, and process ends.
In this step, if this higher level's resource allocation website is not BS, and does not have enough resources, then this website continues to send resource adjustment request message to its higher level's resource allocation website, adjust request message until resource and arrive BS, or be requested website enough resources are arranged.
In this step, be requested website or BS according to present load and resource operating position, and parameters such as QoS and priority, judge whether Resources allocation to RS3, and distribute great resource, and will send resource to subordinate's resource request website and adjust response message, respective site can according to this resource adjust response message adjust oneself from primary resource, and, adjust response message up to this resource and reach RS1 to its subordinate's request resource website transmission resource adjustment response message.
In the above-mentioned flow process, resource is adjusted response message can comprise whether adjustment is successful, and adjusted total resources, position and size, release or increase part resource size and position.
When higher level's website when the subordinate website is initiated resource adjustment order, higher level's website judges at first whether the use of the RS of its subordinate resource is reasonable, whether it is necessary or not carries out the resource adjustment, if needed, for example the RS's of subordinate is excessive or too small from primary resource, then send resource adjustment order, and wait for the resource adjustment acknowledge message of subordinate's website to subordinate's website.
Subordinate's website is adjusted acknowledge message to higher level's website feedback resources after the resource adjustment order that receives higher level's website, and uses adjusted autonomous resource transmission relaying to transmit data.
Except distributing from primary resource, system also can distribute the relaying frame head for the new RS that inserts.RS need use the relaying frame head to indicate the position of its relay resource, and the number of RS is a dynamically changeable, therefore, for the variation of flexible adaptation RS, and does not cause the wasting of resources, has provided a kind of method of dynamic assignment relaying frame head below.
Figure 10 is the schematic diagram of the repeat transmitted subframe 1 in the embodiment of the present invention.As shown in figure 10, the repeat transmitted subframe comprises the relaying frame head, mapping message body RL-MAP and autonomous Resource Block; Wherein, RICH (Relay Indication Channel) is the relaying indicating channel, uses predefined dedicated channel, has indicated the position and the size of autonomous Resource Block, the position and the size of the autonomous Resource Block that the corresponding different RS of different RF CH are shared; Each RS takies one or more autonomous Resource Block; Comprise RFCH (Relay Frame Control Header) in the relaying frame head, RFCH is the repeater frame control channel, and each RS takies one or more RFCH, and the size of each RFCH is fixed; RL-MAP is the relay map message body, and the relaying that indication is carried in primary resource is transmitted the attribute of data block; From primary resource, be used for carrying relaying and transmit data block, constitute by one group of subchannel and some OFDM symbols, subsignal and OFDM symbol can be continuous in logic, also can be physically continuous, unfixing from the position of primary resource, indicate its position and size by RFCH.
The relaying frame head comprises: the position of the autonomous Resource Block corresponding with RFCH and size information, be used for indicating the relaying indicating channel RICH of RFCH number and be used for the synchronous leading symbol Preamble of temporal frequency between each RS of system.Wherein, the quantity of the RFCH that the RICH indication has distributed, each RS sends identical information with BS simultaneously at RICH, promptly indicates the RFCH number of current system assignment; (i is a positive integer to RFCHi, and i=1～K) has indicated the position and size of the shared resource of RSi, can further include: RSID, the code modulation mode that the RL-MAP of RSi correspondence uses.
At the indicated resource section start of relaying frame head, comprised a RL-MAP.RL-MAP comprises: the length of MAP message body, and this Resource Block data carried by data piece number, resource size that each data block takies and position, each data block is in the destination address of this transmission, and the code modulation mode that uses of each data block etc.One of them data block can be corresponding more than one destination address, destination address can use RSID to indicate.
Figure 11 is the flow chart that distributes RFCH in the embodiment of the present invention in the multi-hop relay method.As shown in figure 11,, distribute the method for RFCH in the multi-hop relay method of embodiment of the present invention, may further comprise the steps based on relaying frame head 1:
In this step, if there is not available RFCH, and the data of RFCH surpass predetermined maximum value in the system, then refuse the access of this RS.
In this step, running time-frequency resource links to each other and to be meant physically and/or to link to each other in logic.
When more RS disconnects connection, can discharge some RFCH, avoid system resource waste.Figure 12 is the flow chart that discharges RFCH in the embodiment of the present invention in the multi-hop relay method.As shown in figure 12,, discharge the process of RFCH in the multi-hop relay method of embodiment of the present invention, may further comprise the steps based on relaying frame head 1:
In the above-mentioned flow process, for BS, step 1203 and step 1204 also can be carried out simultaneously.
Embodiment of the present invention also provides two kinds of relay sub-frame, i.e. repeat transmitted subframe 2 and repeat transmitted subframe 3, and the relaying frame head that comprises, relay resource mapping message body (RL-MAP) and the autonomous Resource Block of relaying wherein, do not comprise RICH in the relaying frame head.Position from primary resource can not fixed, and indicates its position and size by RFCH, can fixed position and size yet.Unfixed to the position from primary resource, must indicate its position and size by RFCH, this moment, RFCH must use predefined dedicated channel, and promptly RFCH takies special-purpose resource location, as shown in figure 13; To fixed-site from primary resource, do not need position, so RFCH can use special-purpose channel by the RFCH indexed resource, also can will be placed in primary resource, as shown in figure 14.
Ad-hoc location in the autonomous Resource Block of relaying comprises relay resource mapping RL-MAP.Wherein, ad-hoc location can be the original position of the autonomous Resource Block of relaying, also can be other predefined ad-hoc location.
In relay sub-frame 2, the repeater frame control channel takies predefined dedicated channel, and this dedicated channel is divided into K equal-sized relay and control subchannel, the corresponding autonomous Resource Block of relaying of each repeater frame control subchannel.The autonomous resource block size of each relaying can be different, and each RS can take the autonomous Resource Block of one or more relayings.
RS is distributing to the RFCH subchannel of oneself, and for example k RFCH subchannel sends the repeater frame control information of oneself.The RFCH subchannel has stipulated to take the relay station sign (RSID) of the autonomous Resource Block of k piece relaying, the autonomous Resource Block of k piece relaying position and size information, for example, the initial moment (SymbolBegin) and the finish time (SymbolEnd); In addition, can further include the parameter of RL-MAP message, for example, the repeated encoding number of times of RL-MAP indication (Repetition_Coding_Indication), coded system (MAP_Coding_Indication), the length of RL-MAP (RL-MAP_Length).The parameter of RL-MAP message also can send before RL-MAP message, adopted fixing coded system, can further reduce the size of RFCH subchannel like this, thereby increase available RFCH subchannel number.In addition, can also send some frequency pilot signs on each RFCH subchannel, be used for the recipient and carry out channel estimating, synchronously, or be used for other RS and carry out purposes such as neighbours' detection.
In relay sub-frame 3, repeater frame control channel RFCH has indicated the code modulation mode that RL-MAP uses in the original position of relaying from primary resource.Owing to use fixing autonomous resource distribution mode, each RS is in the one's own repeater frame control information that sends oneself from the original position of primary resource.RFCH has stipulated relay station sign (RSID), the parameter of RL-MAP message, for example, the repeated encoding number of times of RL-MAP indication (Repetition_Coding_Indication), code modulation mode (MAP_Coding_Indication) etc.In addition, can also send some frequency pilot signs on each RFCH subchannel, be used for the recipient and carry out channel estimating, synchronously, or be used for other RS and carry out purposes such as neighbours' detection.
Relaying can be divided according to different modes from primary resource.Can be that time-frequency is divided, promptly autonomous Resource Block takies the OFDM symbol of part, and the subchannel of part is shown in Figure 13 a; Also can be to divide the time, promptly autonomous Resource Block takies the OFDM symbol of part, and all subchannels are shown in Figure 13 b and Figure 14 a; To the time-division from primary resource, RS can take whole groups of subchannels, also can only take the part groups of subchannels; Relaying can also be a frequency partition from the division of primary resource, promptly takies the subchannel of part, all OFDM symbols, shown in Figure 14 b, to frequency division from primary resource, different RS use different groups of subchannels from primary resource.
In above autonomous resource division, the group technology of the subchannel that relates to, and the mapping method of logical sub carrier wave and physical sub-carrier can be used the method in the existing WiMAX system.
Figure 15 is the sub-carrier distribution manner schematic diagram of RFCH subchannel in the multi-hop relay method in the embodiment of the present invention.As shown in figure 15, inner circle of filling oblique line is represented pilot sub-carrier, empty circles is represented data subcarrier, each RFCH subchannel is made up of several equally spaced sub-pieces (Tile) on frequency, each Tile is made up of several continuous physical sub-carriers, wherein first subcarrier of each Tile and last subcarrier are pilot sub-carrier, and all the other subcarriers are data subcarrier.If the sub-carrier number of a Tile is more, then also should comprise pilot sub-carrier in the centre of Tile.
No matter be the repeat transmitted subframe that adopts as shown in figure 10, still adopt the repeat transmitted subframe shown in Figure 13 a, Figure 13 b, Figure 14 a and Figure 14 b, all do not influence the structure of FRL and SRL in the embodiment of the present invention.
In the autonomous Resource Block of the relaying of embodiment of the present invention relay sub-frame, resource mapping (RL-MAP) message has been indicated the time-frequency resource allocating situation of this Resource Block.RL-MAP by several relay resource map information entities (RL-MAP information entity RL-MAP-IE) forms, and in addition, can also comprise the message body that some are special among the RL-MAP, and is as FRM_DEF_IE, as follows:
RL-MAP
{
FRM_DEF_IE
RL-MAP-IE1
RL-MAP-IE2
RL-MAP-IEn
}
RL-MAP-IE has provided the information that relaying is transmitted data block, relaying transmit data block be RS send have same-code modulation system data block, each RS sends one or more relayings forwarding data blocks at it on primary resource.The information that relaying is transmitted data block comprises that needs receive the relay station connection identifier tabulation (RS_CID List) of this data block, and relaying is transmitted the parameter (BurstParameters comprises whether running time-frequency resource positional information, code modulation mode, power that data block takies promote etc.) of data block.
Relaying is transmitted and has been sent the Medium Access Control (MAC) Protocol Data Unit of transmitting by this RS from MS or other website (MAC PDU) on the data block.
Figure 16 is the schematic diagram that RL-MAP message body structure and relaying are transmitted the data block encapsulating structure in the embodiment of the present invention.As shown in figure 16, after the RL-MAP of this RS is received in the last jumping of this RS and next jumping, extract RL-MAP-IE wherein successively, judge the RS_CID (RS_CID is used for identifying RS) that whether comprises oneself among the RS_CID List wherein, if comprise, the relaying that this RL-MAP-IE indication then is described is transmitted in the data block and is included the data that send to oneself.
Be that this RS can realize the relay transmission function after the new RS that inserts distributed running time-frequency resource and relaying frame head by said method.In relay transmission, RS transmits data block with relaying and sends by relay sub-frame, and the running time-frequency resource position of indicating this data block to take by the relaying frame head; Receive RS and need obtain relevant information, judge whether the relaying forwarding data block that receives issues oneself according to the running time-frequency resource position of relaying frame head indication.
With RS2 transmitting-receiving uplink business data and downlink service data is example, and the repeat transmitted subframe of RS2 is FRL, in FRL, comprises the relaying frame head, the running time-frequency resource that the relaying frame head has indicated this data transfer to use.
Figure 17 is the resource indication schematic diagram of multi-hop relay method in the embodiment of the present invention.As shown in figure 17, relaying frame head R has indicated the position of a running time-frequency resource, and the indication Resource Block is the subclass from primary resource A1 of RS2.Relaying frame head R comprises: the size of Resource Block and position indication; Relaying frame head R can also comprise: the relay station sign, this transmits employed Resource Block number, the length of relaying frame head, the used information such as modulation coding mode of mapping (MAP) message body.
At the section start of relaying frame head indication resource, comprised MAP message body, this MAP message has been indicated the attribute of data block that this resource is carried.MAP message body can comprise: the length of MAP message body, and this Resource Block data carried by data piece number, resource size that each data block takies and position, each data block is in the destination address of this transmission, and the code modulation mode that uses of each data block etc.One of them data block can be corresponding more than one destination address, destination address can use RSID to indicate.
With relaying frame head R, MAP message body, and corresponding data block sends, RS1 and RS3 receive in separately FRL subframe RS2 simultaneously in the FRL subframe.RS1 and RS3 be according to receiving that the relaying frame head finds the resource block location of this transmission, demodulation MAP message body then, thus find one's own data block location, and the parameter that receives own data.
RS1 and RS3 obtain sending to the data of oneself according to the indication of MAP message body, and utilize in the data block predefined pilot tone to carry out demodulating and decoding, obtain sending to the MAC PDU of oneself.In each MAC PDU, for example at the front end of MAC PDU, the traffic stream identifier that comprises a PDU, be used to indicate this PDU corresponding service stream, be designated the PDU sign hereinafter to be referred as this, can know according to this PDU sign which MS this PDU belongs to, for downlink transfer, this sign the is corresponding final goal address of PDU; This sign can be used MS sign MSID, or connection identifiers CID, or traffic stream identifier SFID.
Below, based on above-mentioned resource indicating method, the data transmission method in the multi-hop relay method of embodiment of the present invention is elaborated.
Figure 18 be in the embodiment of the present invention in the multi-hop relay method downlink relay transmit the transmission method flow chart of data.As shown in figure 18, receive the downlink relay forwarding data instance that RS1 sends with RS2, the data transmission method in the multi-hop relay method of embodiment of the present invention may further comprise the steps:
In all RS and BS of the multihop relay system of embodiment of the present invention, all storing a data route mapping table, this data route mapping table has been constructed final goal address and the one-to-one relationship of transmitting destination address next time, therefore can obtain the destination address of transmitting next time according to the PDU sign of PDU.For downlink transfer, can know that certain PDU is the RS of subordinate that be dealt into oneself, and be dealt into which RS, still send to the MS in the own compass of competency; If the destination address of transmitting is the RS of subordinate, then current RS continues to transmit this PDU in relay sub-frame; If the destination address of transmitting is a self ID, or the corresponding one's own service range of final goal MS of this PDU sign, represent that then this PDU is the MS that sends in the own compass of competency, this RS will send this PDU in the terminal subframe, comprise the relevant terminal identification information in the sign of this PDU.
In the above-mentioned flow process, it is downlink service data that relaying is transmitted data, the final goal address of its MAC PDU is corresponding MS, need obtain the PDU sign of this PDU from MAC PDU, and default corresponding relation, judge whether this business datum needs relaying to transmit, if desired, then, carry out relaying by relay sub-frame and transmit according to transmitting destination address next time corresponding in the corresponding relation with the final goal address, until being sent to afterbody RS, send to MS again; Otherwise, described business datum is sent to corresponding M S.
Figure 19 be in the embodiment of the present invention in the multi-hop relay method uplink relay transmit the transmission method flow chart of data.As shown in figure 19, receive the uplink relay forwarding data instance that RS3 sends with RS2, the data transmission method in the multi-hop relay method of embodiment of the present invention may further comprise the steps:
For uplink, the final goal address of this MAC PDU is BS, is RS if work as the website of this MAC PDU of pre-treatment, then searches data route mapping table and finds the destination address of transmitting next time, and transmit this PDU in relay sub-frame, until sending to BS; If, then will send to network side after this data processing when the website of this MAC PDU of pre-treatment is BS.
Under some special situation, uplink can be searched this data route mapping table.For example to tree-shaped topological structure, a RS has only higher level's services sites, so any one RS only needs that the uplink relay data are sent to its higher level's services sites and gets final product.But a RS there are a plurality of possible services sites, or higher level's services sites situation that can change, the destination address that data route mapping table determines that transmit next time still need be searched.Different with the data route mapping table in the downlink transfer, the data route mapping table of uplink has shown the route annexation of current website to BS.
In the above-mentioned flow process, it is uplink business data that relaying is transmitted data, the final goal address of its MAC PDU is BS, if when the website of this MAC PDU of pre-treatment is RS, then find the destination address of transmitting next time according to default corresponding relation, and send by relay sub-frame, or directly send to higher level's website by relay sub-frame, until with this data forwarding to BS; If, then will send to network side after this data processing when the website of this MAC PDU of pre-treatment is BS.
For the RS of new connecting system, each website in the multihop relay system can also carry out the transmission of relay data after having carried out aforesaid resource allocation, the distribution of relaying frame head, promptly presses flow process transmission trunking forwarding data block as mentioned above; Some relaying is transmitted data block, need recipient's website whether correctly to receive relaying and transmit data block to transmit leg website feedback, as the HARQ data block, the relaying that this class needs recipient's website to feed back is transmitted data block, receiving status information is carried in the feedback message, unify feedback to transmitting data block from the relaying of different websites, when avoiding a plurality of website independent feedback, the expense that is used to feed back is excessive.
Below, below with the example that is fed back to of relaying HARQ data block, the feedback method of multi-hop relay method in the embodiment of the present invention is elaborated.
Wherein, comprise in the feedback information: the targeted sites of feedback sign, for example RSID tabulation etc.; Message bit pattern (Bitmap) to the targeted sites feedback.Any data block that comprises business datum, for example HARQ data block or ARQ data block etc., feedback information be mapped to a bit position of this bitmap uniquely, show whether corresponding data block is correctly received.
In the MAP message of HARQ data block, comprise that is used to an indicating bit of representing that the transmit leg website needs recipient's website to feed back, this indicating bit also can be included in other information in the HARQ data block.After receiving the data block that comprises business datum when recipient's website, and to judge this data block be the HARQ data block, promptly comprises indicating bit in the data block, then according to predefined frame period, sends the relaying feedback to the transmit leg website.
The relaying feedback can adopt the method for synchronization, recipient's website is after receiving that relaying is transmitted data block, after predefined frame period, feed back, promptly receive relaying and transmit data block to this data block is fed back, like this, the transmit leg website just can be known the feedback information that goes to receive to this data block in which frame.
If the transmit leg website is not being received the feedback of recipient's website to respective data blocks in corresponding frame, then the transmit leg website thinks that recipient's website correctly do not receive this data block; If the transmit leg website is being received the feedback of receiving terminal to this data block in corresponding frame, but feedback information represents to receive mistake, show that then recipient's website correctly do not receive this data block.
Judge incorrect this data block that receives of recipient's website when the transmit leg website, then can start, resend this data block in the suitable time to the resending of this data.
Recipient's website to the feedback of data block comprise affirmation (Acknowledgement, ACK) and non-affirmation (Negative Acknowledgement, NAK).If recipient's website correctly receives relaying and transmits data block, then the frame in appointment sends the affirmation feedback to transmitting terminal; If receiving terminal does not correctly receive relaying and transmits data block, then the frame in appointment sends non-affirmation feedback to the transmit leg website.
Figure 20 is the relaying feedback method schematic diagram in the multi-hop relay method in the embodiment of the present invention.As shown in figure 20, in the embodiment of the present invention, feedback message is carried on an information entity (Information Element, IE) the middle transmission of RL-MAP.The relaying forwarding data block that each RS sends is numbered in a certain order, and the relaying that will mail to same purpose website is transmitted the unified numbering of data block, and the relaying forwarding data block that mails to the various objectives website can use identical relaying to number.
The concrete form of feedback information entity is as shown in table 3.
| Sentence structure | Bit | Remarks |
| ?RL-HARQ-ACK_IE | Repeated link feedback IE | |
| ?{ |
4 | Trunk information entity identification sign indicating number |
| ?Length | 8 | The length of this IE |
| ? |
4 | The RSID number that this IE comprises |
| ?for?i＝1to?RSID_Num | ||
| ?{ |
6 | |
| ?Bit_Number_Indicator_i} | 2 | The feedback information 0x00-Bit_Number=1 0x01-Bit_Number=2 0x10-Bit_Number=4 0x11-Bit_Number=6 that comprises how many bits among the indication Bitmap |
| ?Bitmap | Variable | The feedback information bitmap, total bit number equals the number of bits of feedback sum of each RSID correspondence |
| ?Padding} | Filling bit makes entire I E comprise the integer byte |
Table 3
Wherein, RIUC is used for showing that this message is the relaying feedback message; Bit_Number_Indicator_i represents to have in the bitmap a plurality of bit position to distribute to RSIDi, guarantee the bit position distributed more than or equal to need be to the relaying HARQ number of data blocks of RSIDi feedback, and the bit position that has more can fill out 0, or fills out 1, or fills out 0 or 1 at random.
Bitmap is the feedback information bitmap, promptly to receiving the feedback information from the HARQ data block of different websites.Each feedback bits is arranged at the sequencing that RL-HARQ-ACK_IE occurs according to RSID.For example, the feedback correspondence of RSID1 the 1st～Bit_Number_1 bit among the Bitmap, the feedback correspondence of RSID2 Bit_Number_1+1～Bit_Number_1+Bit_Number_2 bit, analogize in proper order.For example, Bit_Number_1=3, Bit_Number_2=1 ..., Bit_Number_n=2.
Figure 21 is the schematic diagram of the message bit pattern coded system of HARQ feedback message in the embodiment of the present invention.As shown in figure 21, website therefrom finds own corresponding feedback bits position after receiving and receiving the RL-HARQ-ACK_IE that sends from certain RS, knows that just the own relaying that sends transmits data block and whether correctly received by website accordingly.
They more than be the explanation to multihop relay system structure in the embodiment of the present invention and multi-hop relay method principle, yet in real system, the purposes of RS may be different, this can cause the difference of RS ability, promptly has the RS of different abilities.
For the RS of high ability, can own management resource, comprise the resource management of terminal subframe and relay sub-frame, described in above-mentioned execution mode; For RS with part resource management capacity, for example can only be the RS of relay sub-frame resource management, also can carry out multi-hop relay by resource allocation methods and the data transmission method described in the above-mentioned execution mode, but this RS does not need to send the null terminator Null frame head, or transmission and the identical terminal subframe of higher level's website frame head, manage the resource of its terminal subframe by its higher level's website; Also have some RS, do not have resource management capacity fully, not only the resource of its terminal subframe is managed by higher level's website, and the resource of relay sub-frame is also managed by its higher level's website, and this RS can only be as the final jump of RS cascade.
To not possessing the RS of resource management capacity fully, it does not need to send the relaying frame head, but its higher level RS need send the relaying frame head, and must indicate the resource location of these RS reception downlink relay data in the relaying frame head, and the resource location that sends the uplink relay data.
If when low ability RS needs cascade next stage RS, then produce the relaying frame head, otherwise do not produce the relaying frame head, the relaying frame head of generation has been indicated the time-frequency resource allocating situation of this relay sub-frame.When low ability RS did not produce the relaying frame head, relaying frame head of high jump ability RS or BS was also indicated the time-frequency resource allocating situation of the relay sub-frame of this low ability RS on it.
Wherein, comprise relay area in the terminal subframe of high ability RS, be used for relaying and transmit data that this relay area comprises the relaying frame head, is used to indicate the time-frequency resource allocating situation of relay area.
Below, in conjunction with different actual conditions, the frame format of hanging down ability RS is specifically described.
Figure 22 is the schematic diagram of low ability RS cascade system 1 in the embodiment of the present invention.As shown in figure 22, (Access Station AS) is the RS or the BS of high ability, and low ability RS does not have resource management capacity fully to insert website; RS I represents the RS of the low ability of the first kind, and such low ability RS does not send the terminal frame head; RS II represents the RS of the low ability of second class, and such low ability RS sends and the identical terminal frame head of its higher level's website; RS I and RS II do not send the relaying frame head; RS I and RS II and AS use same frequency range, and all are connected to AS, are that RS I and RS II do resource management by AS, comprise the resource management of terminal subframe and the resource management of relay sub-frame, therefore, can reduce the complexity of low ability RS.
Because RS I do not send the terminal frame head, RS I need receive this terminal frame head when AS sends the terminal frame head, and according to the indication of this terminal frame head, is the service of the MS in its compass of competency.RS II sends and the identical terminal frame head of AS, and this needs AS in advance by relay sub-frame, gives RS II with the terminals frames hair that generates, and RS II is the service of the MS in its compass of competency according to the indication of this terminal frame head.
In the terminal subframe, AS is that RS I and RS II do resource management, and by terminal frame head indication RS I and RS II be the interior MS of the compass of competency resource location of serving separately, comprise that RS I and the RS II MS in compass of competency separately sends the resource of downlink data, and receive resource from the upstream data of MS in the compass of competency separately.
In relay sub-frame, RS I and RS II do not send the relaying frame head, by AS is that RS I and RS II do resource management, and to the resource location that RS I and RS II indicate its relay sub-frame, comprise that receiving downlink relay transmits data block and send the resource location that uplink relay is transmitted data block by the relaying frame head.
Figure 23 is the schematic diagram of low ability RS cascade system 2 in the embodiment of the present invention.As shown in figure 23, AS is the RS or the BS of high ability, and RS I and RS II are low ability RS, do not have resource management capacity fully; RS I and RS II and AS use same frequency range, and all are connected to AS.Wherein, RSI does not send the terminal frame head, and RS II sends the terminal frame head identical with its higher level's website, RS I and RS II and AS use same frequency range, and all being connected to AS, is the scheduling that RS I and RS II do the terminal subframe by AS, thereby has reduced the complexity of low ability RS.
In the cascade system 3, in first relay sub-frame and second relay sub-frame, low ability RS is in idle condition, like this, has further reduced the complexity of low ability RS.
Be with the main distinction of two kinds of different Cascading Methods shown in Figure 23 as Figure 22, in the low ability RS cascade system 1 shown in Figure 22, relay data transmits by relay sub-frame, therefore can use with diverse resource division of terminal subframe and data transmission method and come the transmission trunking data; In the low ability RS cascade system 2 shown in Figure 23, relay data transmits by the terminal subframe, therefore the resource division of relay data employing and data transfer mode and terminal subframe are identical, promptly adopt existing resources to divide the transmission that just can realize relay data with data transmission method.
From the downstream station subframe, mark off a zone as the downlink relay district, be used to transmit downlink data from AS to low ability RS; From up terminal subframe, mark off a zone as the uplink relay district, be used to transmit upstream data from low ability RS to AS.The downlink relay district begins part need send the relaying frame head, and the relaying frame head has been indicated the time-frequency resource allocating situation in downlink relay district and uplink relay district.
For the downstream station subframe, consider that each RS and their access website need send pilot tone respectively, so the resource used of each RS and their access website quadrature in time.In up terminal subframe, then only need the running time-frequency resource quadrature to get final product.
Figure 24 is the schematic diagram of low ability RS cascade system 3 in the embodiment of the present invention.As shown in figure 24, AS is the BS or the RS of high ability; RS I and RS II are the low ability RS with part resource management capacity, can do the resource management of relay sub-frame; Wherein, RS I does not send the terminal frame head, and RS II sends the terminal frame head identical with its higher level's website; RS I and RS II and AS use same frequency range, and all are connected to AS, are the resource management that RSI and RSII do the terminal subframe by AS; The resource management of RS I and RS II it goes without doing terminal subframe, thus the complexity of low ability RS reduced.
In this cascade mode, low ability RS is the same with high ability RS, can realize the mutual cascade of multi-hop relay by relay sub-frame.For the downstream station subframe, consider that each RS and their access website need send pilot tone respectively, so the resource used of each RS and their access website quadrature in time.In up terminal subframe, then only need the running time-frequency resource quadrature to get final product.
More than be to the detailed description of the multihop relay system of embodiment of the present invention and multi-hop relay method in practical situations.
The multihop relay system of embodiment of the present invention and multi-hop relay method, not only realized the mutual cascade of multistage RS, and the multi-hop cascade between multiple ability RS, realized that also rational relay transmission resource allocation, relay transmission resource are adjusted, the dynamic trunking frame head distributes, relay data transmits and the relaying feedback, guarantee reliability, the practicality of multi-hop relay, made the technical scheme of embodiment of the present invention can realize the multi-hop relay transmission effectively.
The above only is better embodiment of the present invention, is not to be used to limit protection scope of the present invention.All within the spirit and principle of embodiment of the present invention, any modification of being done, be equal to and replace and improvement etc., all should be included within protection scope of the present invention.
Claims (44)
1. a multi-hop relay method is characterized in that, may further comprise the steps:
Transmit data by the mutual relaying of relay sub-frame between base station and the relay station;
Transmit data by the mutual relaying of relay sub-frame between the relay station;
Terminal room in base station and self compass of competency is by terminal subframe interactive service data;
Terminal room in relay station and self compass of competency is by terminal subframe interactive service data.
2. multi-hop relay method according to claim 1 is characterized in that, described relay sub-frame comprises: first relay sub-frame and second relay sub-frame; Transmit data if first relay sub-frame is used to receive relaying, second relay sub-frame then is used to send relaying and transmits data, transmits data if first relay sub-frame is used to send relaying, and second relay sub-frame then is used to receive relaying and transmits data;
Described terminal subframe comprises: downstream station subframe and up terminal subframe, and up terminal subframe is used to receive the business datum from terminal in its compass of competency, and the terminal that the downstream station subframe is used in its compass of competency sends business datum;
The reiving/transmitting state of corresponding relay subframe interlocks between the relay station of described base station and its cascade and between the relay station of mutually cascade.
3. multi-hop relay method according to claim 2 is characterized in that,
The data that send in first relay sub-frame or second relay sub-frame comprise: the uplink relay to superordinate relay stations or base station transmission is transmitted data, and/or transmits data to the downlink relay that subordinate relay sends; The data that receive in first relay sub-frame or second relay sub-frame comprise: the downlink relay from superordinate relay stations or base station transmission is transmitted data, and/or transmits data from the uplink relay that subordinate relay sends.
4. multi-hop relay method according to claim 1 is characterized in that,
Described relay sub-frame comprises: first uplink relay subframe, first downlink relay sub-frame, second uplink relay subframe and second downlink relay sub-frame;
Described terminal subframe comprises: downstream station subframe and up terminal subframe, and up terminal subframe is used to receive the business datum from terminal in its compass of competency, and the terminal that the downstream station subframe is used in its compass of competency sends business datum;
The reiving/transmitting state of corresponding relay subframe interlocks between the relay station of described base station and its cascade and between the relay station of mutually cascade; Wherein
The data that send in first uplink relay subframe or second uplink relay subframe are: the uplink relay to superordinate relay stations or base station transmission is transmitted data; The data that send in first downlink relay sub-frame or second downlink relay sub-frame are: transmit data to the downlink relay that subordinate relay sends; The data that receive in first downlink relay sub-frame or second downlink relay sub-frame are: the downlink relay from superordinate relay stations or base station transmission is transmitted data; The data that receive in first uplink relay subframe or second uplink relay subframe are: transmit data from the uplink relay that subordinate relay sends.
5. according to claim 2 or 3 or 4 described multi-hop relay methods, it is characterized in that, the transmission of described business datum and reception are provided with parameter according to frame and periodically carry out, described frame is provided with parameter and comprises that the terminal subframe is provided with parameter and relay sub-frame is provided with parameter, is respectively applied for the sequence of positions and the time span ratio of indicating terminal subframe and relay sub-frame.
6. multi-hop relay method according to claim 5 is characterized in that, described multi-hop relay method further comprises: described frame is provided with parameter informs relay station and terminal;
The terminal subframe is provided with parameter sends to ordinary terminal with broadcast mode;
By terminal subframe and/or relay sub-frame relay sub-frame is provided with the new model terminal that parameter sends to relay station and can discern relay sub-frame,, the terminal subframe is provided with the new model terminal that parameter sends to relay station and can discern relay sub-frame by the terminal subframe.
7. multi-hop relay method according to claim 5, it is characterized in that, when system carries out framing control, the base station is provided with parameter by relay sub-frame with new frame, and the time that this parameter is enabled inform relay station, after new argument enabling time arrived, relay station started new parameter simultaneously and communicates, and the new terminal subframe of terminal broadcasting in compass of competency separately is provided with parameter in terminal subframe separately.
8. according to claim 2 or 3 or 4 described multi-hop relay methods, it is characterized in that described relay sub-frame comprises relaying frame head, mapping message body RL-MAP and autonomous Resource Block.
9. multi-hop relay method according to claim 8 is characterized in that, described relaying frame head comprises: repeater frame control channel RFCH, RFCH is at the original position of autonomous Resource Block, the modulation coding method of having indicated mapping message body RL-MAP to be adopted.
10. multi-hop relay method according to claim 8 is characterized in that, described relaying frame head comprises repeater frame control channel RFCH, and RFCH uses predefined dedicated channel, has indicated the position and the size of autonomous Resource Block; Each relay station accounts at least one autonomous Resource Block.
11. multi-hop relay method according to claim 10 is characterized in that, described relaying frame head also comprises: the relaying indicating channel RICH that is used to indicate described RFCH number.
12. multi-hop relay method according to claim 10 is characterized in that, described relaying frame head also comprises: be used for the synchronous leading symbol Preamble of temporal frequency between each relay station of system.
13. multi-hop relay method according to claim 8 is characterized in that, this method also further comprises: when described relay station inserts, distribute the relaying frame head to give relay station;
The method of described distribution relaying frame head is:
In the check system of described base station whether available RFCH is arranged,, then specify existing RFCH for described relay station if having; If no, and the number of RFCH then distributes new RFCH for relay station smaller or equal to predetermined maximum value; If no, and the data of RFCH are then refused the access of this relay station greater than predetermined maximum value in the system.
14. multi-hop relay method according to claim 13 is characterized in that, this method also comprises:
The RFCH that described base station release portion is not used, the running time-frequency resource that makes the RFCH of each relay station take links to each other, and informs the position of carrying out its new RFCH of relay station that RFCH adjusts.
15. multi-hop relay method according to claim 11, it is characterized in that, the method that RICH information is upgraded in the base station is: described base station is notified to all relay stations in self compass of competency with amended RICH information, and with the RICH information of relay station after the broadcasting of the time of agreement is upgraded.
16. multi-hop relay method according to claim 8 is characterized in that, further comprises before this method: when described relay station inserted, for it distributes from primary resource, relay station utilized sending relaying from primary resource and transmitting data of described distribution.
17. multi-hop relay method according to claim 16 is characterized in that, jumps relay station if described relay station is the first jumping relay station or second, then the base station is distributed from primary resource for it as the resource allocation website;
Jump above relay station if described relay station is the 3rd jumping or the 3rd, then superordinate relay stations or base station are distributed from primary resource for it as the resource allocation website.
18. multi-hop relay method according to claim 17 is characterized in that, describedly for relay station distributes the method from primary resource is:
Described Resources allocation website is defined as the size of relay station Resources allocation according to the ability and the type of relay station;
Described Resources allocation website has enough from primary resource, is that described relay station distributes from primary resource from primary resource from self then.
19. multi-hop relay method according to claim 18, it is characterized in that, described Resources allocation website does not have enough from primary resource, then this method also comprises: distribute the website request resource to its other resources, if ask successfully, be that described relay station distributes from primary resource from primary resource then from what adjust acquisition; All ask failure until the base station, then refuse described relay station and insert;
Described Resources allocation website distributes the size of website request resource to be to its other resources: self is from the difference from primary resource of primary resource and subordinate's site requests free time, or is self from the value that calculates by preordering method from primary resource of primary resource and subordinate's site requests free time.
20. multi-hop relay method according to claim 18 is characterized in that, distributes behind primary resource, described Resources allocation website is carried at the size of the resource of distributing and position in the resource allocation Indication message and sends to relay station;
Or return the resource allocation acknowledge message to described resource allocation website.
21. multi-hop relay method according to claim 20 is characterized in that, sets in advance waiting timer and retryCounter;
After described resource allocation website sends the resource allocation Indication message, this method also comprises: after waiting timer is overtime, do not receive resource allocation acknowledge message from relay station, then the resource allocation website resends described resource allocation Indication message to relay station, restart waiting timer and retryCounter is subtracted one, count results until retryCounter is kept to zero, carries out error handling processing.
22. multi-hop relay method according to claim 16, it is characterized in that, described resource allocation website is adjusted the resource of relay station according to the request that receives, and the position and the size of adjusted resource be notified to relay station, the adjusted resource that described relay station will receive as self from primary resource.
23. multi-hop relay method according to claim 16, it is characterized in that, the resource allocation website of described relay station uses when unreasonable in the resource of judging relay station, the resource concurrence of adjusting described relay station send the position of adjusted resource and size to give relay station, described relay station with the resource that receives as self from primary resource.
24. multi-hop relay method according to claim 22 is characterized in that, if described resource allocation website adjustment failure then further distributes the site requests adjustment to its other resources, all can not adjust until the base station, then returns to described relay station and adjusts failure.
25. multi-hop relay method according to claim 12 is characterized in that, sets in advance final goal address and the corresponding relation of transmitting destination address next time in described base station and relay station respectively, described transmission business datum is:
Find the resource location of business datum according to described relaying frame head, read the relay map message body from this resource location;
Find business datum according to the relay map message body, thereby obtain media access control protocol data unit MAC PDU, from MAC PDU, obtain the PDU sign again;
When business datum when being up, when the website of this MAC PDU of pre-treatment is a relay station, then find the destination address of transmitting next time according to default corresponding relation, if when the website of this MAC PDU of pre-treatment be the base station, then will send to network side after this data processing;
When business datum when being descending, if business datum needs relaying to transmit, then, carry out relaying by relay sub-frame and transmit according to transmitting destination address next time corresponding in the corresponding relation with the final goal address, until being sent to the afterbody relay station, send to terminal again; Otherwise, then described business datum is sent to corresponding terminal.
26. multi-hop relay method according to claim 25, it is characterized in that, described relay station receives from the relaying of different relay stations and transmits after the data block, this method further comprises: comprise the indicating bit that is used to represent the needs feedback in the data block if the described relaying that receives is transmitted, then described relay station is carried on receiving status information in the feedback message, the accepting state of transmitting data block from the relaying of different websites is unified feedback, transmit the unified relaying feedback that sends of website of data block to sending relaying.
27. multi-hop relay method according to claim 26, it is characterized in that, it is the data block of transmit leg site number that described relaying is transmitted data block, the transmit leg website is transmitted data block to the relaying of issuing different receiving terminal websites and independently is numbered, and the relaying of issuing identical receiving terminal website is transmitted data block unify numbering;
The method of described transmission relaying feedback is: according to the frame period that sets in advance, numbering according to the business datum piece that receives, this relaying is transmitted the corresponding relaying that shows of data block and transmitted the feedback information whether data block is correctly received, be carried in the relay resource mapping message body of relay sub-frame, send to the website that described transmission relaying is transmitted data block.
28. multi-hop relay method according to claim 1 is characterized in that, described relay station comprises low ability relay station;
Described low ability relay station and high ability relay station, low ability relay station does not produce the terminal frame head, and described terminal frame head is used in reference to the time-frequency resource allocating situation of showing the terminal subframe.
29. multi-hop relay method according to claim 28, it is characterized in that, when described low ability relay station needs cascade next stage relay station, produce the relaying frame head, otherwise do not produce the relaying frame head, described relaying frame head is used in reference to the time-frequency resource allocating situation of showing this relay sub-frame.
30. multi-hop relay method according to claim 29, it is characterized in that, when low ability relay station did not produce the relaying frame head, relaying frame head of a high jump ability relay station or base station also was used to indicate the time-frequency resource allocating situation of the relay sub-frame of described low ability relay station on it.
31. multi-hop relay method according to claim 28 is characterized in that, comprises relay area in the terminal subframe of high ability relay station, is used for transmission trunking and transmits data, this relay area comprises the relaying frame head;
The relaying frame head of described relay area is used in reference to the relay area time-frequency resource allocating situation of showing.
32. a multihop relay system is characterized in that, comprising: base station and relay station,
Transmit data by the mutual relaying of relay sub-frame between described base station and the relay station;
Transmit data by the mutual relaying of relay sub-frame between the described relay station;
Terminal room in described base station and self compass of competency is by terminal subframe interactive service data;
Terminal room in described relay station and self compass of competency is by terminal subframe interactive service data.
33. multihop relay system according to claim 32 is characterized in that, described relay sub-frame comprises: first relay sub-frame and second relay sub-frame; If first relay sub-frame receives relaying and transmits data, second relay sub-frame then sends relaying and transmits data, transmits data if first relay sub-frame sends relaying, and second relay sub-frame then receives relaying and transmits data;
Described terminal subframe comprises: downstream station subframe and up terminal subframe, and up terminal subframe receives the business datum from terminal in its compass of competency, and the terminal of downstream station subframe in its compass of competency sends business datum;
Between the relay station of described base station and its cascade and mutually the reiving/transmitting state of corresponding relay subframe interlocks between the cascade relay station.
34. multihop relay system according to claim 33 is characterized in that,
The data that send in first relay sub-frame or second relay sub-frame comprise: the uplink relay to superordinate relay stations or base station transmission is transmitted data, and/or transmits data to the downlink relay that subordinate relay sends; The data that receive in first relay sub-frame or second relay sub-frame comprise: the downlink relay from superordinate relay stations or base station transmission is transmitted data, and/or transmits data from the uplink relay that subordinate relay sends.
35. multihop relay system according to claim 32 is characterized in that,
Described relay sub-frame comprises: first uplink relay subframe, first downlink relay sub-frame, second uplink relay subframe and second downlink relay sub-frame;
Described terminal subframe comprises: downstream station subframe and up terminal subframe, and up terminal subframe receives the business datum from terminal in its compass of competency, and the terminal of downstream station subframe in its compass of competency sends business datum;
Between the relay station of described base station and its cascade and mutually the reiving/transmitting state of corresponding relay subframe interlocks between the cascade relay station; Wherein
The data that send in first uplink relay subframe or second uplink relay subframe are: the uplink relay to superordinate relay stations or base station transmission is transmitted data; The data that send in first downlink relay sub-frame or second downlink relay sub-frame are: transmit data to the downlink relay that subordinate relay sends; The data that receive in first downlink relay sub-frame or second downlink relay sub-frame are: the downlink relay from superordinate relay stations or base station transmission is transmitted data; The data that receive in first uplink relay subframe or second uplink relay subframe are: transmit data from the uplink relay that subordinate relay sends.
36. according to claim 33 or 34 or 35 described multihop relay system, it is characterized in that described base station is provided with parameter according to frame, periodically transmit data by relay sub-frame and the mutual relaying of relay station; According to frame parameter is set, periodically with self compass of competency in terminal room by terminal subframe interactive service data;
According to parameter being set, periodically transmit data between the described relay station by the mutual relaying of relay sub-frame with the corresponding frame in base station; According to parameter being set with the corresponding frame in base station, periodically with self compass of competency in terminal room by terminal subframe interactive service data;
Described frame is provided with parameter and comprises that the terminal subframe is provided with parameter and relay sub-frame is provided with parameter, is respectively applied for the sequence of positions and the time span ratio of indicating terminal subframe and relay sub-frame.
37. multihop relay system according to claim 36 is characterized in that, further by terminal subframe and/or relay sub-frame, the frame that receives described dynamic adjustment is provided with parameter to described terminal;
If described terminal is an ordinary terminal, obtains the terminal subframe by broadcast parameter is set;
If described terminal is for discerning the new model terminal of relay sub-frame, described new model terminal and/or relay station receive relay sub-frame by terminal subframe and/or relay sub-frame parameter are set; By the terminal subframe, the receiving terminal subframe is provided with parameter.
38., it is characterized in that according to the described multihop relay system of claim 37, when framing control is carried out in system in described base station, new frame is provided with parameter by relay sub-frame, and the relay station in the time apprizing system enabled of this parameter;
Described relay station starts new parameter simultaneously with other relay stations and communicates after new argument enabling time arrives, and the new terminal subframe of terminal broadcasting in compass of competency separately is provided with parameter in terminal subframe separately;
The terminal subframe that described terminal receives from superordinate relay stations is provided with parameter.
39. multihop relay system according to claim 32 is characterized in that, described relay station comprises the relay station of new access;
The superordinate relay stations of described base station or described new access relay station is further used for distributing from primary resource into the relay station of described new access as higher level's resource allocation website.
40. according to the described multihop relay system of claim 39, it is characterized in that, described relay station be further used for self when primary resource is not enough, to described higher level's resource allocation website application resource; Self when primary resource is superfluous, discharge resource to described higher level's resource allocation website application; Reception is from the adjustment result of higher level's resource allocation website.
41. multihop relay system according to claim 32 is characterized in that, described relay station is the new relay station that inserts;
Described base station is further used for distributing available repeater frame control channel RFCH or new RFCH into described relay station; Relay station notice in self administers is used to represent the relaying indicating channel RICH information of RFCH number; With the interior RICH of relay station after the broadcasting of the time of agreement is upgraded of self administration.
42. multihop relay system according to claim 32 is characterized in that,
Described base station is further used for judging whether comprise the indicating bit that is used to represent the needs feedback in the data block that receives, if comprise, then sends the relaying feedback by predetermined frame relay sub-frame at interval to subordinate relay; The relaying that receives from subordinate relay by predetermined frame relay sub-frame at interval feeds back;
Described relay station is further used for judging whether comprise the indicating bit that is used to represent the needs feedback in the data block that receives, if comprise, then sends the relaying feedback by predetermined frame relay sub-frame at interval to the higher level's website and/or the subordinate relay of described relay station; The relaying that receives from higher level's website and/or subordinate relay by predetermined frame relay sub-frame at interval feeds back.
43. multihop relay system according to claim 32, it is characterized in that, described relay station comprises low ability relay station and high ability relay station, and low ability relay station does not produce the terminal frame head, and described terminal frame head is used in reference to the time-frequency resource allocating situation of showing the terminal subframe.
44. according to the described multihop relay system of claim 43, it is characterized in that, when described low ability relay station needs cascade next stage relay station, produce the relaying frame head, otherwise do not produce the relaying frame head, described relaying frame head is used in reference to the time-frequency resource allocating situation of showing this relay sub-frame.
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